JPH0525962B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides a gutter-like structure by interposing a net-like filter material on the outer side of a drainage channel member, except for a required width portion on the lower side, if necessary. The blind drainage method and drainage channel for forming culvert collection and drainage pipes are based on covering with pine and are not only capable of efficiently collecting and draining ground water for many years, but also have excellent construction efficiency and economy. It is related to members.

(Prior Art and Problems to be Solved by the Invention) When constructing a blind drainage system in the ground, how can soil particles be separated and only water collected efficiently and permanently? The most important thing is to keep this in mind.

By the way, conventional blind drainage construction methods for the ground include a method in which the ground is replaced with chestnut stone or gravel to form a drainage space between the stones, or a construction method made of synthetic resin or concrete that has a water collection port as a collection of independent holes. There are construction methods such as burying perforated pipes underground to perform blind drainage of the ground.

However, with the former construction method, there was a problem that clogging of the stone gaps was rapid and it was difficult to ensure the durability of the drainage collection. On the other hand, in the latter method, since the pipe itself needs to function both as a water collection pipe and as a drainage pipe, the hole is drilled at the bottom of the pipe, as shown in Figure 32. It has no choice but to be the upper part b, excluding part a, which is about 1/4 of the height of the side. Therefore, there are restrictions on the location where the holes are drilled and the number of holes, making it difficult to collect water well. Furthermore, since the water level inside the pipe was limited to a low level of about the lower quarter of the pipe (compared to the highest water level shown in Figures 2 and 32), drainage efficiency was not good. Furthermore, since the through hole c not only serves as a filter for water inflow, but also as a filter, if the through hole c is clogged, it becomes impossible to collect water at the clogged portion, and the water collection and drainage are permanent. There was a defect that made it difficult to ensure the quality.

The object of the present invention is to provide a new blind drainage construction method that not only makes it possible to solve these problems, but also allows easy and efficient construction and is also economically efficient.

(Means for solving the problem) Blind drainage construction method according to the present invention (hereinafter referred to as construction method)
In the outer part 2a of the drainage channel member 2, an inflow opening 15 for water inflow is provided so as to be continuous with the gutter part 7,
An underdrain collection/drainage pipe 1 is formed by directly covering a trough-like pine 3 exhibiting a water collection function, and the outside thereof is a filter layer 51 made of a filter material such as gravel, cobblestone, or sand.
This is a blind drainage construction method in which the trough-shaped mat 3 is buried in the soil surrounded by a trough-shaped body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2. The water inflow portion 38 is formed between the adjacent gutter-like bodies 17, 17, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable to each other, and are configured in this way. The trough-like mat 3 is placed on the outer side 2a of the drainage channel member 2 disposed in the excavated groove 42 with a required drainage slope, except for the lower required width portion 34 where the inflow opening 15 does not exist, and the inflow is carried out. The opening 15 is directly covered so that the axial water channel 16 is covered with the covering portion.
However, it is characterized in that it is connected to a filter water passage section 40 between the outer section 2a of the drainage channel member 2 and the outer section 17a of the gutter-like body 17.

In addition to the construction method according to the present invention, a gutter-like mat is constructed by interposing a mesh filter material 36 on the outer side 2a of the drainage channel member 2, in which the inflow opening 15 for water inflow is provided so as to be continuous with the gutter part 7. This is a blind drainage construction method in which an underdrain collection/drainage pipe 1 covered with a culvert 3 is buried in the soil with its outside surrounded by a filter layer 51 made of a filter material such as gravel, cobblestones, sand, etc. The gutter-like body mat 3 is a gutter-like body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2.
A water inflow portion 38 is formed between the adjacent gutter-like bodies 17, 17, and the adjacent gutter-like bodies 17, 17
The gutter-like mat 3, which is connected and integrated so as to be bendable, is attached to the outer side 2a of the drainage channel member 2 disposed in the excavated groove 42 with a required drainage slope. , a mesh filter material 36 is interposed to cover the inflow opening 15 except for the lower required width portion 34 where the inflow opening 15 does not exist, and in the covered portion, the axial water channel 16 is It is characterized by being connected to a filter water passage section 40 between the outer part 2a of the drainage channel member 2 and the mesh filter material 36 or between the outer part 17a of the gutter-like body 17 and the mesh filter material 36. It is something to do.

Another aspect of the construction method according to the present invention is to directly attach a gutter-like mat 3 exhibiting a water collecting function to the outer side 2a of the drainage channel member 2, in which the inflow opening 15 for water inflow is provided so as to be continuous with the gutter part 7. A blind drainage method in which an underdrain collection/drainage pipe 1 is buried in the soil with its outside surrounded by a filter layer 51 made of a filter material such as gravel, cobblestones, sand, etc. The gutter-like body mat 3 includes a gutter-like body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2.
Water inflow portion 38 between adjacent gutter-like bodies 17, 17
is formed, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable, and the gutter-like body mat 3 constructed in this way is inserted into the excavated groove 42 with a required drainage slope. The outer part 2a of the disposed drainage channel member 2 is covered directly with the exception of the lower required width part 34 where the inflow opening 15 does not exist, so as to cover the inflow opening 15, and in the covered part, The axial water channel 16 is connected to the filter water passage section 40 between the outer part 2a of the drainage channel member 2 and the outer part 17a of the gutter-shaped body 17, and is covered with the drainage channel member 2. This structure is characterized in that the outer side of the gutter-like mat 3 located at 3 is covered with a mesh filter material 39.

Another aspect of the construction method according to the present invention is to directly attach a gutter-like mat 3 exhibiting a water collecting function to the outer side 2a of the drainage channel member 2, in which the inflow opening 15 for water inflow is provided so as to be continuous with the gutter part 7. A blind drainage method in which an underdrain collection/drainage pipe 1 is buried in the soil with its outside surrounded by a filter layer 51 made of a filter material such as gravel, cobblestones, sand, etc. The gutter-like body mat 3 includes a gutter-like body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2.
Water inflow portion 38 between adjacent gutter-like bodies 17, 17
is formed, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable, and the gutter-like body mat 3 constructed in this way is inserted into the excavated groove 42 with a required drainage slope. The outer part 2a of the disposed drainage channel member 2 is covered directly with the exception of the lower required width part 34 where the inflow opening 15 does not exist, so as to cover the inflow opening 15, and in the covered part, The axial water channel 16 is connected to the filter water passage section 40 between the outer part 2a of the drainage channel member 2 and the outer part 17a of the gutter-shaped body 17, and is covered with the drainage channel member 2. The outer part of the gutter-like mat 3 located at
a (not necessarily sandwiched over the entire length),
It is characterized by being sandwiched between the drainage channel member 2 and the lower end portion 46 of the trough-like mat 3.

Furthermore, the drainage channel member 2 for forming an underdrain collection/drainage pipe according to the present invention connects a drainage gutter body 5, which is entirely made of synthetic resin, and the opposing upper ends of the drainage gutter body 5 at required intervals. The drainage gutter body 5 includes an upper opening gutter portion 7 having a shape in which the upper portion of a cylindrical tube is cut out, and the opposing upper end portion thereof has a locking protrusion. Alternatively, the connecting member 6 may be a locking groove portion.
is characterized in that it has an arch shape with a downward opening, and its opposing lower end is a locking groove or a locking protrusion that is engaged and integrated with the locking protrusion or locking groove. It is something.

(Function) According to the construction method of the present invention, ground water is efficiently filtered and collected due to the presence of the trough-like mats 3. For this water collecting action, the trough-like body pine 3
There are two modes of active water collection: one is active water collection through the water inlet 38 as a connection part, and the other is active water collection through the gap 52 between the trough-like mat 3 and the drainage channel member 2. Note that the latter water collecting action is performed by the trough-like pine 3.
The ground water at the lower end portion 53 of the gap 52 between the drain channel member 2 and the drain channel member 2 is passed from the linear water intake portion as the lower edge portion 53 through the gap 52 where a mesh filter material 36 is interposed as necessary. let it rise;
Since the lower end portion 53 is positioned lower, the linear water intake portion is lowered, and the water performance is improved accordingly.

The collected ground water is then transferred to a filter water passage section 40 between the outer part 2a of the drainage channel member 2 and the outer part 38 of the gutter-like body 17, or between the outer part 2a of the drainage channel member 2 and the mesh filter. 36 or between the outer part 17a of the gutter-like body 17 and the mesh filter material 36, and moves in the circumferential direction (for example, in the direction of arrow F1 shown in FIG. 2),
In addition, ground water flows through the axial waterway 16 and moves in the axial direction of the underdrain collection and drainage pipe 1 (for example, in the direction of arrow F2 shown in Fig. 1), and due to the combined phenomenon of water movement in the circumferential direction and the axial direction, the ground water The water moves by freely changing the direction of the flow, flows into the gutter portion 7 of the drainage channel member 2 through the inflow opening 15, flows smoothly within the gutter portion 7, and is discharged at its end.

Here, the filter action in the underdrain collection and drainage pipe 1 will be explained. First, when water is collected through the water inlet 38 of the trough-like pine 3, particles such as soil particles contained in ground water are separated and captured in the water inlet 38; After
It is subjected to multiple filter actions, such as being separated and captured in the filter water passage section 40, or sedimented and separated and captured in the axial channel 16 of the trough-like body 17. Further, when water is collected through the gap 52 between the trough-like mat 3 and the drainage channel member 2, particles such as soil particles in the ground water are separated and captured in the filter water passage section 40.

(Example) Examples of the present invention will be described below based on the drawings.

First Embodiment FIG. 1 shows an example of an underdrain collection/drainage pipe 1 in the construction method of the present invention, and the underdrain collection/drainage pipe 1 is as follows:
It is constructed at the construction site by covering the required outer part of the drainage channel member 2 disposed in the excavated groove with the gutter-like mat 3, especially with the mesh filter material 36 interposed therebetween.

The drainage channel member 2, as shown in FIGS. 1 to 4,
The entire structure is made of synthetic resin and consists of a drainage gutter body 5 and an arch-shaped connecting member 6. The drainage gutter body 5 has an upper opening gutter portion 7 having a shape in which about the upper quarter of a cylindrical pipe is cut off.
As shown in FIG. 3, the opposing upper end portions are wedge-shaped locking protrusions 10 having locking steps 9, 9 on both sides of the base end. Further, the connecting member 6 has an arch shape with a downward opening having a required length set according to the curvature of the drainage gutter body 5, etc., and the opposing lower end portions thereof are formed into a locking groove portion 11.
The locking groove portion 11 has an inverted U-shape into which the locking protrusion 10 can be inserted, and the groove wall piece 1 opposite thereto
Locking protrusions 13, 13 that can engage with the locking step portions 9, 9 of the locking protrusion 10 are provided on the inner side of the lower ends of the locking projections 2, 12.
is expanded. However, for example, both groove wall pieces 1
When the locking protrusion 10 is pushed into the locking groove 11 against the elastic action of the grooves 2 and 12, the engagement between the locking step 9 and the locking protrusion 13 causes the drainage gutter body 5 to connect with the arch. It will be integrated with the shaped connecting member 6. When the opposing upper ends of the drainage gutter bodies 5 are connected at required intervals by the arch-shaped connecting members 6 in this manner, the gutter portions 7 are formed as shown in FIG.
The required drainage channel member 2 in a stable state is constructed, having an inlet opening 15 for water inflow that is continuous with the drain channel member 2 . Note that the locking protrusion 10 and the locking groove 1
1 may be provided in the opposite manner.

Furthermore, the connection between the upper end of the drainage gutter body 5 and the lower end of the arch-shaped connecting member 6 is not limited to that described in the above embodiment, and various engagement means may be employed.

In this embodiment, the gutter-shaped mat 3 has the following features:
As shown in FIG. 5, gutter-like bodies 17 for forming an axial water channel 16 (see FIG. 1) extending in the axial direction of the drainage channel member 2 are successively connected in a loosely fitted manner. The gutter-like body 17 is entirely made of synthetic resin and is integrally molded, and as shown in FIGS. 6 and 7, by winding both ends of the central wall 19 in opposite directions, two adjacent cavities that become water channels are formed. The center wall 19 mainly has an S-shaped cross section, which has openings 22 and 22 forming water inlets between the ends of the ends and the center wall 19. Between the ends, protrusions 23, 23 are provided so as to protrude on both sides, and the empty space 1
The outer surfaces of 6a and 16b are provided with a locking protrusion 25 and a locking groove 26 that can engage with each other. As shown in FIG. 7, the locking protrusion 25 has a substantially T-shaped cross section with locking portions 29, 29 swollen on both sides of the distal end of the protrusion 27. In addition, the locking groove 26 is connected to the locking protrusion 2.
A pair of opposing protruding pieces 3 form a groove 31 into which the distal end portion 30 of No. 5 can be fitted with a margin.
2, 32, and the locking portions 29, 29 are formed at the tips of the respective protruding pieces 32, 32.
Locking pieces 33, 3 curved in a semicircular arc that can be engaged with
3 are arranged in series so as to face each other. Note that the protruding length of the locking protrusion 25 is set to be slightly larger than the groove depth of the locking groove 26.

However, as shown in FIG. 7, when the distal end portion 30 of the locking protrusion 25 is loosely inserted into the locking groove 26 against the elastic action of the protruding pieces 32, 32, for example,
Due to the engagement between the locking portion 29 and the locking piece 33, the locking protrusion 25 cannot be removed from the locking groove 26, thereby connecting the gutter-shaped bodies 17 and 17 with each other in a loose fit. It will be done. The connected gutter-like body can be bent within a certain range due to the play in the connecting portion 35, and the connecting portion 35 can be bent within a certain range.
The gap g formed in is, as described later,
This serves as a water inflow section 38 through which ground water actively flows in and passes. The gutter-like body 17 having such a configuration is set to have a length substantially equal to the entire length of the drain channel member 2, for example, and the required number of gutter bodies 17 are sequentially connected and integrated according to the above-mentioned procedure, and the length of the gutter-like body 17 is set to be approximately equal to the entire length of the drain channel member 2. Outer part 2a
The trough-like mat 3 is designed to cover the entire area except for the lower required width portion 34 (see FIGS. 1-2 and 5).

Here, the lower required width portion 34 of the drainage channel member 2 refers to the lower required width portion of the outer portion 2a of the drainage channel member 2 where the inflow opening 15 for water inflow does not exist (in this embodiment). refers to the portion excluding the lowermost end surface portion of the drainage gutter body 5.

In order to prevent the trough-like mat 3 from losing its shape, it is preferable to connect the trough-like bodies 17, 17 to each other using adhesive tape (not shown). When the gutter-like mat 3 formed in this way is placed over the outer part 2a of the drainage channel member 2, in this embodiment, it is necessary to interpose the mesh filter material 36 between the two, so it is done in this way. The formed trough-like mat 3 is housed in a net-like body 37 with both ends open and having a filter function, and as shown in FIG. I am trying to make it so that

The underdrain collection and drainage pipe 1 is constructed by covering the lower required width portion 34 of the drainage channel member 2 with the gutter-like mat 3 covered with mesh filter materials 36 and 39. As shown in FIGS. 1 and 2, the underdrain collection/drainage pipe 1 has the following configuration: between the outer part 2a of the drainage channel member 2 and the mesh filter material 36, or between the outer part 17a of the gutter-like body 17 and the mesh filter material 39. An axial water channel (mainly an inner opening cavity 16) extending in the axial direction F2 (see FIG.
a) comprises 16. In this state, the other empty chamber 16b of the gutter-like body 17 opens outward (see FIGS. 1 and 2). Note that the outer opening cavity 16b
In some cases, the axial water channel 16 also functions effectively as the axial water channel 16, but this point will be described later.

In addition, in the present invention, a gutter-like mat 3 is installed in the drainage channel member 2 depending on the condition of the ground where blind drainage is to be performed.
In some cases, it is covered in double, triple, or more layers. Further, the trough-like mat 3 is formed by joining a plurality of unit trough-like mats 3a each having a unit width at their side ends via a net-like body, as shown in FIG. 8, for example. There is also.
In this case, water will also be collected from the joint 41.

Next, the construction method of the present invention will be specifically explained, taking as an example the case where the underdrain collection and drainage pipe 1 having the above-mentioned configuration is targeted. In addition, the function of collecting and draining ground water in this construction method will be explained.

That is, as shown in FIG. 4, the construction method of the present invention first requires drain gutter bodies 5 to be installed in an excavated groove 42 provided in the area where the blind drainage work is to be performed, with the ends successively joined. The drainage slope is as follows. Note that the drainage gutter bodies 5, 5 are connected to each other by the drainage gutter bodies 5, 5.
This is done by covering the abutting end portions 43 of the joint tape 45 with adhesive joint tape 45. Thereafter, a continuous body of drainage channel members 2 is formed by connecting the opposing upper ends of the drainage gutter bodies 5 at required intervals by arch-shaped connecting members 6. At this time, in order to improve the bonding strength between the drainage gutter bodies 5, 5, it is preferable to attach the connecting member 6 so as to straddle the end portions of the drainage gutter bodies 5, 5 to be joined. In this way, when attaching the connecting member 6 across both drainage gutter bodies 5, 5, as shown in FIG. It is best to wrap it around 6 times. After that, 1st to 2nd
As shown in the figure, the outer part 2a of the formed drainage channel member 2 is covered with mesh filter materials 36 and 39, except for the lowermost end surface part (lower required width part) 34. Cover with the trough-like mat 3, and if necessary, lower both lower end portions 46, 46 of the trough-like mat 3.
The lower end portion 46 is temporarily fixed to the drain channel member 2 with an adhesive tape or the like, or temporarily pressed to the drain channel member 2 with a stone or the like, so that the lower end portion 46 is in close contact or substantially close contact with the outer portion 2a of the drain channel member 2. The required underdrain collection and drainage pipe 1 is constructed (see Fig. 9). In addition,
In order to actively utilize the covering with the gutter-like mat 3 to improve the strength of the underdrain collection/drainage pipe 1, as shown in FIG. An adhesive intermediate support tape 47 similar to the joint tape 45
is wound so that the joint ends 49, 49 of the trough-like mat 3 are positioned on the intermediate support tape 47, and the joint ends 49, 49 are covered with an adhesive joint tape 50 and joined. It is better. In addition, when the gutter-like mats 3 and 3 are joined together in this way, the presence of the joint tape 45 and the intermediate support tape 47 makes it possible to connect the gutter-like mats 3 to the outside of the drainage channel member 2. A flowing water gap is positively formed between the part 2a and the part 2a. After that, as shown in Figure 9, the outside of the culvert collection and drainage pipe 1 is covered with gravel,
It is surrounded by a filter layer 51 made of filter materials such as cobblestones, sand, and rice husk, and then the underdrain collection and drainage pipe 1 and the filter layer 51 are buried in the soil.

The filtration and collection of ground water in the construction method of the present invention can be broadly divided into the first mode through the water inflow section 38 as the connection section of the trough-like pine 3, as described in the section of "function" above. There are two types: (1) and a second mode (see FIGS. 1-2, FIG. 9) that passes through the gap 52 between the trough-like mat 3 and the drainage channel member 2.

First filtration water collection function Ground water is filtered through the filter layer 5 made of gravel, cobblestones, etc.
1 and the mesh filter material 39 forming the outermost layer of the underdrain collection and drainage pipe 1, after coarse particles are filtered.
The water reaches the filter water passage section 40 through the water inflow section 38 of the trough-like mat 3.
Particles such as soil particles contained in the ground water that has passed through the water inflow section 38 are separated and captured. In particular, in this embodiment, the underdrain collection and drainage pipe 1
However, since it has an outer opening cavity 16b formed by the trough-like body 17, soil particles in the ground water heading towards the water inflow part 38 pass through the outer opening before reaching the water inflow part 38. It flows into the empty chamber 16b and is captured by the empty chamber 16b. That is, the outer opening cavity 16b thus functions as a filter. Therefore, the amount of particles such as soil particles heading toward the water inflow portion 38 is reduced accordingly. The ground water that has passed through the water inflow section 38 reaches the filter water passage section 40, where it can move in the circumferential direction F1 (see Fig. 2) and in the axial direction F2 within the axial water channel 16 (see Fig. 1). reference). In addition, the gutter-like body pine 3
The mutual bonding is performed using the intermediate support tape 47 as described above.
If this is done above, the gap between the gutter-like mat 3 and the outer side 2a of the drainage channel member 2 will increase by the thickness of the joint tape 45 and the intermediate support tape 47. Water movement in this direction will occur more smoothly. And these circumferential directions F
1. Due to the combined phenomenon of water movement in the axial direction F2, ground water can freely change its flow direction and move.
It flows into the drain channel member 2 through the inflow opening 15 (see FIG. 2). At this time, since microparticles are separated and captured in the filter water passage section 40, clean water containing extremely few soil particles flows into the gutter section 7 of the drain channel member 2 from the inflow opening section 15.

Second filtration water collection action The ground water at the lowermost end of the underdrain collection and drainage pipe 1 flows from the linear water intake section as the lower end 53 of the gap 52 between the trough-like mat 3 and the drainage channel member 2. 5
2 rises, receives the filtration action by the mesh filter material 36 interposed in the gap 52, and flows into the gutter portion 7 of the drain channel member 2 through the inlet opening 15. In other words, the same water collection effect as if a linear water collection hole were provided on the lower side of the outer part 2a of the drainage channel member 2 at the same height as the lower end part is exhibited. becomes.

For this reason, in this embodiment, ground water is collected actively even at the lowest end of the underdrain collection and drainage pipe 1, and the position of the inflow opening 15 for water inflow is Since it is set high, the water level in the underdrain collection and drainage pipe 1 can be made high.

The water flowing into the drainage channel member 2 smoothly flows through the drainage channel member 2 and is discharged at the end thereof.

In addition, since the ground water is configured so that it can move in the circumferential direction F1 and the axial direction F2, for example, if the amount of water collected in a certain water collection part is excessive, the inflow in a certain water collection part Even if the opening is clogged, the inflow water quickly flows downstream in the axial water channel 16 and also moves in the circumferential direction, so that it flows into the required inflow opening 15. be. At this time, since the axial water channels 16 are arranged in parallel, the inflow water can be appropriately selected to flow easily depending on the state of accumulation of soil particles, etc. in the axial water channels 16. Flows smoothly.

In this embodiment, in particular, since the underdrain collection/drainage pipe 1 is provided with the outer opening cavity part 16b, for example, if the amount of water to flow into the drainage channel member 2 is excessive, the filter water passage part 40 flows out from the water inlet 38 as a trough-like body connection part, flows in a suitable outer opening cavity 16b, passes through the water inlet 38 again at a suitable position on the downstream side, and is passed through the filter. It is conceivable that the water reaches the water passage portion 40 and flows into the drainage channel member 2 in the same manner as described above. Alternatively, if the amount of ground water to be collected in a certain water inlet 38 is excessive, a portion of the ground water flows into the outer opening cavity 16b and flows downstream. , water inflow part 3 at a suitable location on the downstream side
It is also conceivable that the water passes through 8 and reaches the filter water passage section 40. In this case, the outer open cavity 16b functions as the axial water channel 16, and can be said to assist the drainage action in the axial water channel 16 as the inner open cavity 16a.

Second Embodiment FIG. 11 shows another embodiment of the construction method according to the present invention, in which the outer part 2a of the drainage channel member 2 is
The trough-like mat 3 is directly placed over the trough-like mat 3 without intervening a mesh filter material, and the axial water channel 16 formed by the trough-like mat 3 is connected to the outer side 2a of the drainage member 2 and the outside of the trough-like member 17. It is constructed so as to be connected to the filter water passage section 40 between the filter section 17a and the section 17a.

Third Embodiment FIG. 12 shows another embodiment of the construction method according to the present invention, in which the outer part 2a of the drainage channel member 2 is
The trough-like mat 3 is directly placed over the trough-like mat 3 without intervening a mesh filter material, so that the axial water channel 16 formed by the trough-like mat 3 connects the outer part 2a of the drainage channel member 2 and the trough-like body 17. The outer part of the gutter-like mat 3 which is connected to the filter water passage part 40 between the outer part 17a and covered with the drainage channel member 2 is covered with a mesh filter material 39.

Fourth Embodiment FIG. 13 shows another embodiment of the construction method according to the present invention, in which the outer part 2a of the drainage channel member 2 is
The trough-like mat 3 is directly placed over the trough-like mat 3 without intervening a mesh filter material, so that the axial water channel 16 formed by the trough-like mat 3 connects the outer part 2a of the drainage channel member 2 and the trough-like body 17. The outer part of the gutter-like mat 3 which is connected to the filter water passage part 40 between the outer part 17a and covered with the drainage channel member 2 is covered with a mesh filter material 39, and Lower end portion 39a of mesh filter material 39
, the lower end portion 4 of the drainage channel member 2 and the gutter-like body mat 3
6 (due to the sandwiching,
(The lower end 39a of the net-like filter material is stabilized), and when sandwiched in this way, the outer part 2a of the drain channel member 2 is
The area between the filter material 39a and the sandwiched net-like filter material 39a, or between the outer portion 17a of the gutter-like body 17 and the sandwiched mesh-like filter material 39a becomes the filter water passage section 40 according to the present invention.

Others In the construction method of the present invention, the drainage channel member 2 is connected to the drainage gutter body 5 as in the above embodiment (not limited to an arch-shaped member).
In addition to being configured as a combination with 6,
As shown in FIGS. 14 and 15, it is configured as a tube body having the required number of water inflow openings 15 such as circular holes 55, slit holes (not shown), or relatively large windows 56. Sometimes.

16 and 17 show other examples of the gutter-like mat 3, in which the gutter-like body 17 is connected using joint tape 45, and the water inflow portion 38 is formed between the adjacent gutter-like bodies 17, 17. The adjacent gutter-like bodies 17, 17 are connected and integrated so that they can be bent within a certain range (see FIG. 18).

19 to 24 show other examples of the gutter-like body 17,
It is a sectional view showing the connection state and the state arranged around the drainage channel member 2, and as in the case of the previous embodiment, the ground water flowing in from the water inflow part 38 as the gutter-like body connection part is and flows in the axial direction and into the drainage channel member 2. Note that FIGS. 19 to 21 show cases in which a trough-like body formed by partially modifying the form of the S-shaped trough-like body shown in the above embodiment is used, and in particular, the second trough-like body is used.
FIG. 1 shows a case where some of the gutter-like bodies constituting the gutter-like body mat 3 are connected so that the inner open chamber parts 16a, 16a or the outer open chamber parts 16b, 16b are adjacent to each other. .

25 and 26 show the outer part 2 of the drainage channel member 2.
This figure shows another embodiment of the underdrain collection/drainage pipe 1 in which the degree of coverage of the gutter-like body pine 3 on the underdrain pipe 1 is different from that in the previous embodiment, and the degree of coverage is different from that of the blind drainage pipe. It is set as required, taking into consideration the ground conditions, etc.

In the construction method of the present invention, the manner in which the drainage channel members 2, 2 are connected to each other is not limited to that shown in the embodiment described above, and as shown in FIG. In some cases, they are joined. In addition, in order to facilitate the joining and to allow the above-mentioned connecting member 6 to be attached without difficulty by spanning the end portions 57, 57 of both drainage gutter bodies 5, 5, the end of one drainage gutter body 5a is It is best to cut the portion diagonally 59. Alternatively, the drainage channel members 2, 2 may be connected to each other using a connecting pipe 60 or the like, as shown in FIG. 28.

Since the underdrain collection and drainage pipe 1 is formed by on-site construction as described above, how can the drainage channel members 2, gutter-like mats 3, etc. for constructing the underdrain collection and drainage pipe 1 be economically constructed? The question of whether or not to transport the materials to the site is an issue in terms of construction costs.

Examples of transportation methods that eliminate waste include:
If the drain channel member 2 is pipe-shaped and has a relatively large diameter, the wound gutter-like mat 3a is housed inside the pipe-shaped drain channel member 2, as shown in FIG. It is a good idea to wear it. Also, drainage channel member 2
However, in the case where it is composed of the drainage gutter body 5 and the arch-shaped connecting member 6 as shown in the above embodiment, as shown in FIGS. 30 and 31,
It is preferable to stack the drainage gutter bodies 5 on top of each other and to stack the arch-shaped connecting members 6 on top of each other for transportation.

(Effects of the Invention) As is clear from the descriptions in (a) and (b) below, the construction method of the present invention separates the water collection part and drainage part to improve water collection efficiency and drainage efficiency as much as possible. This not only makes it possible to efficiently collect and drain ground water in a short period of time, but also allows effective collection and drainage to continue for many years.

(a) The construction method of the present invention covers the outer part of the drainage channel member.
If necessary, a net-like filter material is interposed and the internal space formed by this is covered with a gutter-like mat that forms a linear water collection part.
Various types of spaces (mainly spaces formed by gutter-like mats, spaces within drainage channel members,
and (if a mesh filter material is interposed, a space formed by the mesh filter material, which is a space that communicates with each other), and each of these spaces is independent of each other. In addition, it is constructed to maximize the effectiveness of water collection and drainage to separate water and soil particles. Therefore, the underdrain collection and drainage pipe of the present invention is completely different in nature from the above-mentioned conventional perforated pipe, which is configured to perform the water inflow function and the filter function through the same through hole, and is efficient. It is possible to collect water.

In addition, in the construction method of the present invention, since ground water can freely move in the circumferential direction and axial direction, the inflow opening provided in the drainage channel member Even if a part of the section is clogged, the ground water in the clogged section will quickly flow to other parts except the clogged inflow opening, and will flow into the drainage channel member from the inflow opening in the other part. Inflow. In this way, when looking at a certain inflow opening, not only the ground water in the surrounding area flows into the inflow opening, but also the ground water that has collected and moved in the area away from the inflow opening. will flow in.

As is clear from the above, the construction method of the present invention enables "permanent water collection."

(b) Furthermore, the construction method of the present invention has multiple filter actions (separation and capture of soil particles at the water inflow part as the connection part of the trough-like pine, filter water flow part (separation and capture of soil particles by sedimentation in the axial channel of the gutter-like body), clean water with less particulate matter flows into the inlet opening of the drainage channel member. . Therefore, in the drainage channel member, there is no risk that the internal space will become narrow due to accumulation of soil particles and the drainage performance will deteriorate, and in this way, clean water with less particulate matter is drained. Since the inflow flows into the inflow opening of the channel member, it is also possible to set the inflow opening large, so that even with a small number of inflow openings, the inflow can flow into the axial water channel of the trough-like body. This allows the water to quickly flow into the drainage channel member. And because of this, and secondly,
Since ground water can be raised and collected from the linear water intake section at the lower end between the trough-like body pine and the drainage channel member, the inflow opening is used as a drainage channel. It can also be provided in the upper part of the member as much as possible, and unlike the case of the conventional perforated drainage pipe described above, the water level of the drainage channel member can be set high. In other words,
The flow rate within the drainage channel member can be increased. In addition, even if there is a slight deviation in the drainage gradient due to installation errors in the underdrain collection/drainage pipe, or if the underdrain collection/drainage pipe partially sinks due to uneven pressure, the drainage within the drainage channel member will be prevented. The effect can be guaranteed.

As is clear from the above, the construction method of the present invention enables "effective drainage" in a permanent manner.

The underdrain collection and drainage pipe in the construction method of the present invention has a structure as a "flexible pipe" in which the drainage channel member is covered with a trough-like mat and has added elasticity, so it is different from the conventional one which is a simple single pipe. It has a much higher load-bearing capacity than perforated pipes, and is less susceptible to damage due to earth pressure.

The construction method of the present invention provides for a required outer part of a drainage channel member placed in an excavated trench with a required drainage slope.
It is very simple to cover the gutter-like pine with a net-like filter material interposed if necessary, or to cover the outer part of the covered gutter-like pine with the mesh-like filter material, so we hope to improve construction efficiency. sell.

In addition, the trough-like mat is provided on the outside of the drainage channel member.
Because it is covered except for the required width on the lower side, the number of gutter-like bodies that make up the gutter-like mat is reduced compared to the case where the entire circumference of the drainage channel member is covered with the gutter-like mat. Excellent economical efficiency. By the way, the gutter-like body that covers the lower required width part of the outer side of the drainage channel member hardly contributes to collecting ground water, so there is no particular problem in removing it. , the lower end between the gutter-like mat and the drainage channel member functions as a linear water intake part, and it is as if a linear shape is formed below the outer part of the drainage channel member at the same position as the lower end. The water collection effect similar to that achieved when a water collection hole is provided is exhibited, and the water performance of the underdrain collection and drainage pipe is improved.

Furthermore, in the construction method of the present invention, since the underdrain collection and drainage pipes perform multiple filter functions, filter materials are saved compared to the case of constructing blind drainage works in the ground using perforated pipes, as mentioned at the beginning. At the same time, conditions regarding the quality of filter materials can be relaxed.

In this way, when using the construction method of the present invention,
It is possible to save material costs and construction labor, thereby reducing construction costs and shortening the construction period.

The arch-shaped connecting member connects the drainage channel member for forming an underdrain collection/drainage pipe according to the present invention to a drainage gutter body made entirely of synthetic resin and the opposing upper ends of the drainage gutter body at required intervals. When the drainage gutter body and the arch-shaped connecting member are configured to be integrated by engagement with the locking protrusion and the locking groove, on-site assembly work is required. In addition to being easy to carry out, the drainage gutter bodies can be stacked on top of each other, or the arch-shaped connecting members can be stacked on top of each other, and transported efficiently to the construction site without waste.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing an embodiment of the underdrain collection and drainage pipe according to the construction method of the present invention, Fig. 2 is a cross-sectional view of the underdrain collection and drainage pipe, and Fig. 3 is the engagement with the locking protrusion. 4 is a perspective view showing the drainage channel member, FIG. 5 is a perspective view showing the gutter-like mat covered with a net, and FIG. 6 is the gutter-like member. FIG. 7 is a side view showing how the gutter-like bodies are connected to each other, FIG. 8 is a cross-sectional view showing the drainage channel member covered with a plurality of gutter-like mats, and FIG. 9 is the present invention. Perspective view showing a blind drainage structure made by applying the construction method, Part 1
Figure 0 is a perspective view showing an example of how to connect the gutter-like mats to each other, Figures 11-13 are sectional views showing other aspects of the underdrain collection and drainage pipe, and Figures 14-15 are other aspects of the drainage channel member. FIGS. 16 and 17 are perspective views showing other examples of trough-like mats, and FIG. 18 is a 17th
A sectional view showing the bent state of the trough-like body shown in the figure, the first
Figures 9 to 24 are cross-sectional views showing other examples of gutter-like bodies, together with their connected states and the states in which they are arranged on the outer circumferential surface of the drain pipe. Cross-sectional views showing other aspects, No. 27-
FIG. 28 is a cross-sectional view showing another aspect of joining the drainage channel members, FIG. 29 is a cross-sectional view showing a state in which the rolled gutter-like mat is housed in the pipe-shaped drainage channel member.
Fig. 30 is a side view showing a state in which drainage gutter bodies are stacked together, Fig. 31 is a side view showing a state in which arch-shaped connecting members are stacked together, and Fig. 32 is an example of a conventional culvert collection/drainage pipe. It is a sectional view shown together with a state of use. DESCRIPTION OF SYMBOLS 1... Underdrain collection drain pipe, 2... Drain channel member, 3... Gutter-shaped body mat, 7... Gutter part, 15... Inflow opening, 16...
Axial water channel, 17...Gutter-shaped body, 34...Required width portion,
36...Mesh filter material, 38...Water inlet, 40...
Filter water passage section, 42...excavation groove, 51...filter layer.

Claims (1)

[Claims] 1. An inflow opening 15 for water inflow is provided in the outer part 2a of the drainage channel member 2 so as to be continuous with the gutter part 7,
An underdrain collection/drainage pipe 1 is formed by directly covering a trough-like pine 3 exhibiting a water collection function, and the outside thereof is a filter layer 51 made of a filter material such as gravel, cobblestone, or sand.
This is a blind drainage construction method in which the trough-shaped mat 3 is buried in the soil surrounded by a trough-shaped body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2. The water inflow portion 38 is formed between the adjacent gutter-like bodies 17, 17, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable to each other, and are configured in this way. The trough-like mat 3 is placed on the outer side 2a of the drainage channel member 2 disposed in the excavated groove 42 with a required drainage slope, except for the lower required width portion 34 where the inflow opening 15 does not exist, and the inflow is carried out. The opening 15 is directly covered so that the axial water channel 16 is covered with the covering portion.
is connected to a filter water passage section 40 between the outer section 2a of the drainage channel member 2 and the outer section 17a of the gutter-like body 17. 2. The blind drainage construction method according to claim 1, wherein the trough-like mat 3 is formed by integrally connecting the trough-like bodies 17 and 17 with each other in a loosely fitted manner. 3. The blind drainage construction method according to claim 1, wherein a thin tape-like material is adhered to the outer part 2a of the drainage channel member 2. 4. The blind drainage construction method according to claim 1, wherein the gutter-like body mat 3 is formed by integrally connecting the gutter-like bodies 17 and 17 with each other using a joint tape 45. 5. On the outer side 2a of the drainage channel member 2, the inflow opening 15 for water inflow is provided so as to be continuous with the gutter section 7,
The trough-like mat 3 is formed with a mesh filter material 36 interposed therebetween.
This is a blind drainage construction method in which an underdrain collection/drainage pipe 1 is buried in the soil with its outer side surrounded by a filter layer 51 made of filter material such as gravel, cobblestones, sand, etc. The shaped body mat 3 has a gutter-like body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2, and an adjacent gutter-like body 17,
A water inflow portion 38 is formed between the trough-like bodies 17, and the adjacent trough-like bodies 17, 17 are connected and integrated so as to be bendable. Excavation trench 4 with drainage slope
On the outer part 2a of the drainage channel member 2 disposed inside the drain channel member 2,
Lower required width portion 3 where no inflow opening 15 is present
A net-like filter material 36 is interposed to cover the inflow opening 15 except for the inlet 4, and in the covered portion, the axial water channel 16 is connected to the drain channel member 2.
between the outer part 2a of the trough-like body 17 and the mesh filter material 36, or between the outer part 17a of the gutter-like body 17 and the mesh filter material 3.
6. A blind drainage construction method characterized in that the blind drainage construction method is characterized in that the drainage construction method is continuous with a filter water passage section 40 between the filter water passage section 40 and 6. The blind drainage construction method according to claim 5, wherein the trough-like mat 3 is formed by integrally connecting the trough-like bodies 17 and 17 with each other in a loosely fitted manner. 7. The blind drainage construction method according to claim 5, wherein a thin tape-like material is adhered to the outer part 2a of the drainage channel member 2. 8. The blind drainage construction method according to claim 5, wherein the gutter-like mat 3 is formed by integrally connecting the gutter-like bodies 17 and 17 with each other using a joint tape 45. 9. On the outer side 2a of the drainage channel member 2, an inflow opening 15 for water inflow is provided so as to be continuous with the gutter part 7,
An underdrain collection/drainage pipe 1 is formed by directly covering a trough-like pine 3 exhibiting a water collection function, and the outside thereof is a filter layer 51 made of a filter material such as gravel, cobblestone, or sand.
This is a blind drainage construction method in which the trough-shaped mat 3 is buried in the soil surrounded by a trough-shaped body 17 for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2. The water inflow portion 38 is formed between the adjacent gutter-like bodies 17, 17, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable to each other, and are configured in this way. The trough-like mat 3 is placed on the outer side 2a of the drainage channel member 2 disposed in the excavated groove 42 with a required drainage slope, except for the lower required width portion 34 where the inflow opening 15 does not exist, and the inflow is carried out. The opening 15 is directly covered so that the axial water channel 16 is covered with the covering portion.
The gutter-like body is connected to the filter water passage portion 40 between the outer side portion 2a of the drain channel member 2 and the outer side portion 17a of the gutter-like body 17, and is placed over the drain channel member 2. A blind drainage construction method characterized by covering the outer part of the mat 3 with a mesh filter material 39. 10. The blind drainage construction method according to claim 9, wherein the trough-like mat 3 is formed by integrally connecting the trough-like bodies 17 and 17 with each other in a loosely fitted manner. 11. The blind drainage construction method according to claim 9, wherein a thin tape-like material is adhered to the outside portion 2a of the drainage channel member 2. 12. The blind drainage construction method according to claim 9, wherein the gutter-like mat 3 is formed by integrally connecting the gutter-like bodies 17 and 17 with each other using a joint tape 45. 13 Outer side 2a of the drainage channel member 2 provided with an inflow opening 15 for water inflow so as to be continuous with the gutter 7
An underdrain collection/drainage pipe 1 which is directly covered with a gutter-like pine 3 exhibiting a water collection function is provided with gravel on the outside.
Filter layer 5 made of filter materials such as cobblestones and sand
This is a blind drainage construction method in which the trough-like mat 3 is buried in the soil in a state surrounded by a trough member 2, and the trough-like mat 3 is a trough-like member for forming an axial water channel 16 extending in the axial direction of the drainage channel member 2. 17, adjacent gutter-like bodies 17, 17
A water inflow portion 38 is formed between each other, and the adjacent gutter-like bodies 17, 17 are connected and integrated so as to be bendable. Directly cover the outer part 2a of the drainage channel member 2 arranged in the excavated groove 42 with a slope, except for the required width part 34 on the lower side where the inflow opening 15 does not exist, and so as to cover the inflow opening 15. , in the covered portion, the axial water channel 1
Reference numeral 6 denotes a filter water passage section 40 between the outer section 2a of the drainage channel member 2 and the outer section 17a of the gutter-like body 17.
At the same time, the outer side of the gutter-like mat 3 placed over the drainage channel member 2 is covered with a mesh filter material 39, and the lower end portion 39a of the mesh filter material 39 is connected to the drainage channel member 2. 2 and the lower end portion 46 of the gutter-like body pine 3. 14. The blind drainage construction method according to claim 13, wherein the gutter-like mat 3 is formed by integrally connecting the gutter-like bodies 17, 17 with each other in a loosely fitted manner. 15 Claim 13: A thin tape-like material is attached to the outer part 2a of the drainage channel member 2.
Blind drainage construction method described in section. 16. The blind drainage construction method according to claim 13, wherein the gutter-like mat 3 is formed by integrally connecting the gutter-like bodies 17 and 17 to each other using a joint tape 45. 17 Consists of a drainage gutter body 5 made entirely of synthetic resin and arch-shaped connecting members 6 that connect the opposing upper ends of the drainage gutter body 5 at required intervals. , comprising an upper opening gutter part 7 having a shape in which the upper part of a cylindrical pipe is cut off,
The opposing upper end portions are a locking protrusion or a locking groove, while the connecting member 6 has an arch shape with a downward opening, and the opposing lower end portion is a locking protrusion or a locking groove. A drainage channel member for forming an underdrain collection and drainage pipe, characterized in that it has a locking groove portion or a locking protrusion portion that is integrally engaged with the groove portion.