JPH1077666A - Piling-up member for underground water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide piling-up members capable of building up the members in a polygonal cylindrical body in a construction site, displaying great resistance force against vertical downward load and conveying or keeping them in a neat shape. SOLUTION: Piling-up members for an underground water storage tank are formed of a pair of symmetrical synthetic resin divided bodies 40 forming hollow polygonal cylindrical bodies making a polygon in a plane view by having a plurality of side walls 41 equipped with a large number of water ports 42 and opposing them to each other to butt. Then, each of the divided bodies 40 is divided into one end edge 43 and the other end edge 44, and an interlocking section 45 and an interlocked section 46 are provided. A bearing surface 54 is provided over the entire length part of one side 47 on one end side of each of the divided bodies 40 and the other side on the other end side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stacking member arranged side by side in a water storage space of an underground water storage tank and stacked vertically.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 4-26648 discloses a stacking member of this type. The stacking member described in this publication is a hollow polygonal tubular body having a polygon in plan view having a plurality of side walls provided with a large number of water inlets, and the plurality of side walls are constricted or constricted. It is inclined to the ball. The stacking member is added to the water permeable layer by supporting the water permeable layer disposed over the opening at the ground surface of the water storage space formed in a concave shape in the ground from below, from below. One of the roles is to receive the load.

[0003]

However, when the stacking members described in the above publications are stacked,
Since the side walls of each stacking member are inclined, the vertical downward load applied to the permeable layer is supported by the inclined side walls of the individual stacking members. Buckling is likely to occur, and if one side wall is buckled, its effect is exerted on the other side wall, and the buckling of the other side wall is likely to occur. Although this situation is somewhat improved by increasing the thickness of the sidewalls, it cannot be an essential solution.

When a hollow polygonal tubular body is used as a stacking member as in the stacking member described in the above-mentioned publication, one stacking member has a large bulk and is conveyed from a factory to a construction site of an underground water storage tank. In addition to the high cost, there is a problem that a large space is required as a storage space in a factory or a construction site, so that the economy is low.

The present invention has been made in view of the above-mentioned problems, and not only can the side walls become vertical when piled up to exert a large counterforce against a vertical downward load, but also to a construction site. It is an object of the present invention to provide a stacking member for an underground water storage tank that can be assembled into a polygonal cylindrical body, and can be transported or stored in a bulkless shape.

[0006]

SUMMARY OF THE INVENTION A stacking member for an underground water storage tank according to the present invention is a stacking member which is arranged side by side in a water storage space formed in a concave shape in the ground and is vertically stacked. A symmetrical shape having a plurality of side walls with a large number of water openings formed therein and having a plurality of vertical side walls by facing and facing each other to form a hollow polygonal cylindrical body having a polygon in plan view A pair of synthetic resin divided bodies, which are divided into one edge and the other edge corresponding to the divided portion in each divided body, and an engaging portion and an engaged portion which can be connected to each other. A support surface is provided over the entire length of one side and the other side of each of the divided bodies in the axial direction of the polygonal cylindrical body. Between the two above-mentioned divided bodies stacked in To the support surface which is provided on the side portion of the other end of the body, the supporting surface which is provided on the side portion of the one end side of the upper side of the divided bodies are formed so as to overlap, is that.

[0007] In this stacking member, the pair of divided bodies can be connected using the engaging portion and the engaged portion provided on each of the pair of divided bodies. And, on each of the side portion on one end side and the side portion on the other end side of the stacking member formed by connecting the pair of divided bodies,
Since the support surfaces provided on the one end side and the other end side of each of the pair of divided bodies are located, a large number of stacking members are vertically stacked using the support surfaces. can do. The pair of divided bodies form a hollow polygonal cylindrical body having a plurality of vertical side walls and forming a polygon in a plan view by facing and butting each other. When the stacking members formed by connecting are stacked, each of the side walls of the individual stacking members becomes vertical. For this reason, a large counterforce is exerted against a vertical downward load applied to the stacking member via the permeable layer.

[0008] In addition, a large number of individual divided bodies can be overlapped in a fitting manner in the same direction.

[0009] In the stacking member according to the present invention, the divided body may have two side walls orthogonal to each other, or may have three side walls continuously connected at an opening angle larger than 90 degrees. It may be something. The same effect as described above is exerted on these stacking members.

In the present invention, the engaging portion is an engaging groove provided over the entire length of one edge of the divided body, and the engaged portion is one of the divided bodies. It is possible to adopt a configuration in which the projection is provided over the entire length of the end edge and can be fitted only by sliding the polygonal tubular body in the axial direction of the polygonal tubular body. This stacking member also exerts the same effect as described above.

In the present invention, a rib extending in the axial direction of the polygonal cylindrical body is provided on each of the plurality of side walls,
A support surface provided on each of the full length portions of the one end side and the other end side of the divided body is formed by the surface of the flange portion provided on each of those sides, One end of the rib is connected to a flange provided on one side of the divided body, and the other end of the rib is provided on a flange provided on the other side of the divided body. It is desirable to adopt a configuration of being provided continuously. By doing so, the ribs serve to increase the strength against a downward load.

[0012] In the present invention, a positioning piece protruding from one side of the above-mentioned divided body is fitted to the other side of the other divided body on which the divided body is stacked. ,
It is desirable to adopt the configuration described above.

In this way, when the stacking members formed by connecting the pair of split bodies are stacked one above the other, the positioning piece forms the lower stacking member. The workability is improved because the stacking member stacked on the lower stacking member is positioned with respect to the lower stacking member only by being internally fitted to the other end portion of the stacking member.

[0014]

FIG. 1 is a partially omitted vertical sectional view schematically showing an underground water storage tank A constructed using a stacking member 4 according to an embodiment of the present invention, and FIG. 2 is an underground water storage tank. A is a schematic plan view, FIG. 3 is an explanatory view showing a part of the underground water storage tank A, FIG. 4 is an explanatory view showing another part of the underground water storage tank A, and FIG. Perspective view from obliquely above, FIG.
7 is a perspective view of the divided body 40 as viewed obliquely from below, FIG. 7 is a perspective view of the stacking member 4 as viewed obliquely from above, and FIG.
FIG. 9 is a partial plan view showing the engaging portion 45 and the engaged portion 46, FIG. 10 is a cross-sectional view for explaining the operation of the positioning piece 55, and FIG. It is explanatory drawing of the state which overlapped 40 in the fitting shape.

The underground water storage tank A shown in FIG. 1 has a water storage space 1 which is formed by digging into the ground so as to be recessed into the ground. In the water storage space 1, the peripheral wall surface 11 is inclined upwardly so as to have an elevation angle as small as possible in consideration of the angle of repose of the earth and sand forming the stratum. The bottom wall surface 12 and the bottom wall surface 1 of the water reservoir section 1
2 is covered with a water impermeable sheet 2 having no water permeability, and a nonwoven fabric 21 is provided on the water impermeable sheet 2. Sheets such as a vinyl chloride resin sheet, a rubber sheet, and a pocket ethylene resin sheet can be used as the water-impervious sheet 2.

The aggregate 3 is loaded on the bottom wall 12 of the water storage space 1 via the water-blocking sheet 2 and the nonwoven fabric 21. This assembly 3 is composed of a large number of stacking members 4 which are arranged horizontally and stacked vertically. These stacking members 4 are made of a synthetic resin skeletal structure, and each of the stacking members 4 itself has a space for storing water, and these spaces communicate with each other to form one large space as a whole. ing.

A concrete partition wall 5 which is vertically raised is provided around the assembly 3. A large number of water holes 51 are formed in the partition wall 5 so as to penetrate therethrough, and water is given to the partition wall 5 by the water holes 51. In the example shown in the figure, partition walls 5, 5 which are vertically raised are also provided at two places in the center of the water storage space 1, and the partition walls 5 divide the assembly 3 into two right and left parts. Have been. Then, a water-permeable layer 6 composed of a collection of small solids is provided in the space between the partition wall 5 and the peripheral wall surface 11 and the space between the two partition walls 5 and 5 at the center.
Has been deployed. The water-permeable layer 6 is formed by loading crushed stone into the space. It is also possible to form this water-permeable layer 6 with pebbles such as gravel or cobblestone. Further, a water permeable layer 7 is provided on the assembly 3 and the water permeable layer 6. The permeable layer 7 is formed by laying earth and sand, and a lawn is vegetated using the permeable layer 7. It is also possible to form a car parking lot on the permeable layer 7. In addition, the partition wall 5 may be made of porous concrete, and the partition wall 5 may be provided with water permeability. In addition, the thickness of the partition wall 5 is
The thickness is set so as to have a strength that can withstand them by comprehensively taking into consideration the load applied to the water and the load applied to the water-permeable layer 6. In addition, the partition wall 5 can be made of plastic such as FRP, whereby the weight of the partition wall can be reduced, and there is an advantage that transportation and construction are facilitated.

In this underground water storage tank A, when the partition wall 5 is formed in a rectangular shape as shown in FIG. 2, a plurality of flat concrete panels can be formed by butting at right angles or by flat plates. By doing so, the workability of the partition wall 5 is improved. When the partition walls 5 are joined at right angles to each other and joined to each other, as shown in FIG. 3, the abutting portions of the partition walls 5 are sandwiched between a pair of corner connecting tools 101 and 102 from both the front and back sides, and they are joined. 10 such as bolts and nuts inserted through
It should just be tightened at 0. When the partition walls 5 are joined in a flat plate shape and joined together, as shown in FIG. 4, the abutting portions are sandwiched between a pair of flat connecting members 103 and 104 from both front and back sides thereof, and these are joined to the partition wall. 5 may be fastened with fasteners 100 such as bolts and nuts.

The water-impervious sheet 2 and the water-permeable layer 6 are provided in the water-storage space formed by the stacking member 4.
Is arranged at the end of the surface water introduction channel 8 extending therethrough. The surface water introduction channel 8 is provided for introducing rainwater collected from a gutter provided on the sidewalk of a city park (not shown) or rainwater flowing out of a tennis court or the like into the water gap. . Further, a drain groove 91 for draining water collected in the water gap is provided at the bottom of the water storage space 1. The start of the drain passage 9 is connected to the drain groove 91. ing. The drainage channel 9 can be formed by embedding a synthetic resin pipe, and a control valve 92 is interposed in the drainage channel 9.

In the underground water storage tank A described above, the wall 13 surrounding the water storage space 1 is not always necessary. However, when it is necessary to strengthen or stabilize the ground, the wall 13 may be formed of a discarded concrete layer having a predetermined thickness.

The stacking member 4 is prepared by preparing a pair (two) of the divided bodies 40 shown in FIGS. 5 and 6, and abutting the pair of the symmetrical divided bodies 40, 40 to face each other. Are formed by forming a hollow polygonal cylindrical body having a vertical side wall and having a rectangular shape in a plan view, and connecting them to each other. Split body 40
Is integrally formed of a synthetic resin such as a polypropylene resin or a polyvinyl chloride resin, and the stacking member 4 formed by connecting the pair of divided bodies 40 becomes a skeleton structure made of a synthetic resin.

The divided body 40 shown in FIGS. 5 and 6 is provided with a large number of water inlets 42... And has two side walls 41, 41 connected in a rectangular shape which are orthogonal to each other. Further, an engaging portion 45 and an engaged portion 46 which can be connected to each other are provided by being divided into one edge 43 and the other edge 44 corresponding to the division portion in the division body 40. . In addition, the side 4 on one end side of the divided body 40 in the axial direction of the polygonal cylindrical body formed by the pair of divided bodies 40
Flanges 49, 49, 52, 52 are provided over the entire length of the side 7 and the other side 48, and the surfaces of the flanges 49, 49, 52, 52 form support surfaces 53, 54. Is formed. Then, between the two divided bodies 40, 40 stacked vertically,
The supporting surface 54 provided on the side 48 on the other end of the lower divided body 40 is attached to the side 4 on one end of the upper divided body 40.
The support surfaces 53 provided on the 7 overlap each other.

The engaging portion 45 is an engaging groove provided over the entire length of the one edge 43, and the engaged portion 46 is provided over the entire length of the other edge 44. And an engaged projection which can be slid and fitted into the engagement groove. That is, as shown in FIG. 9, the engaging portion 45 has a protruding portion 45a and a protruding portion 45b protruding at right angles to the protruding portion 45a.
The engaged portion 46 has a wide groove portion 46b into which the projecting piece portion 45b can be fitted and a narrow groove portion 46a into which the projecting portion 45a can be fitted.

A positioning piece 55 protrudes from a side portion 47 on one end side of the divided body 40. The positioning piece 55 is internally fitted to the side portions 48 on the other end side of the lower divided body 40.

The two side walls 41, 41 of the divided body 40
A rib 5 extending in the axial direction of the polygonal cylindrical body
6 are provided over a plurality of sections. These ribs 56
Has one end and the other end connected to the flanges 49,5.
2 are connected to each other.

When the engaging portions 45, 45 provided on each of the pair of divided bodies 40, 40 and the engaged parts 46, 46 are fitted to each other, and the pair of divided bodies 40, 40 are connected to each other. The stacking member 4 shown in FIGS. 7 and 8 is assembled.

FIG. 10 shows a form in which the stacking members 4 are vertically stacked. As can be seen from the figure, the support surface 53 provided on the upper stacking member 4 overlaps with the support surface 54 provided on the lower stacking member 4 and is provided on the upper stacking member 4. The positioning piece 55 is fitted inside the lower stacking member 4. For this reason, the upper stacking member 4 is accurately positioned with respect to the lower stacking member 4. Also, each of the side walls 41 of the individual stacking members 4 is vertical, and the ribs 5
6 and the positioning piece 55 are also vertical. Therefore, the permeable layer 7
A large opposing force is exerted against a vertical downward load applied to the stacking member 4 via the second member, so that the side wall 41 does not buckle due to a normal downward load.

A lid is attached to each of the uppermost stacking members 4, and the water holes 42 of the stacking members 4 are closed by the lids. The permeable layer 7 is formed on the lid.

As shown in FIG. 11, a large number of the above-mentioned divided bodies 40 can be fitted together in the same direction. In this case, since a large number of divided bodies 40 are not bulky, when storing a large number of divided bodies 40 at a factory or a construction site of the underground water storage tank A, a very large space is not required, and the division by trucks is not required. The transportation cost per one divided body when transporting the body 40 is reduced. Further, since the ribs 56 are provided on the side walls 41 of the divided body 40, the ribs 56 help to increase the strength against a downward load.

FIG. 12 is a partial plan view showing a stacking member 4 according to another embodiment of the present invention and a state in which the stacking members 4 are arranged, and FIG. 13 is a divided body 40 for forming the stacking member 4 of FIG. It is explanatory drawing of the state which overlapped in the fitting shape.

The stacking member 4 shown in FIG. 12 has three side walls 41, 41, 41 connected at an opening angle larger than 90 degrees.
This is an example of a configuration in which a pair of divided bodies 40, 40 having the same are faced to face each other, and an engaging portion 45 provided on each of the divided bodies 40, 40 and an engaged portion 46 are connected. . In this case, the stacking member 4 is formed of a polygonal cylindrical body having a regular hexagonal shape in plan view.

Other divided body 40 or stacking member 4
, For example, the point that a large number of water inlets 42 are opened in the three side walls 41 of the divided body 40,
And the engaged portion 46 are provided separately on one edge and the other edge corresponding to the divided portion in the divided body 40, and one side and the other end of the divided body 40 are provided. A flange portion is provided over the entire length of each side portion,
A rib 56 is provided on each of the point that a supporting surface is formed by the surfaces of the flange portions, a point that a positioning piece protrudes from a side portion on one end side of the divided body 40, and the above-described three side walls 41. About points that are
The configuration is the same as the configuration of the divided body 40 or the stacking member 4 described in FIG.

Also with this divided body 40, as shown in FIG. 13, a large number of divided bodies can be overlapped in the same direction in a fitting manner. Even in such a case, a large number of divided bodies 40 are not bulky. When storing a large number of divided bodies 40 at a factory or a construction site of the underground water storage tank A, a very large space is not required, and the transportation cost per one divided body when transporting the divided bodies 40 by truck is low. Cheap.

In the underground water storage tank A described with reference to FIGS. 1 and 2, since the peripheral wall surface 11 of the water storage space 1 is inclined upward and upward, when the peripheral wall surface 11 is formed vertically. In comparison, the surrounding wall surface 11 itself is stable.
In addition, the load on the water-permeable layer 6 between the partition wall 5 and the peripheral wall surface 11 is applied in a direction to compact the peripheral wall surface 11, so that the peripheral wall surface 11 is further stabilized. In addition, since the partition wall 5 that is vertically raised around the aggregate 3 is provided between the water-permeable layer 6 and the aggregate 3, the partition wall 5 allows the water to flow through. The small solids such as crushed stones forming the layer 6 are prevented from entering the water collecting space inside the aggregate 3 and closing the space, and at the same time, a person walks on the water permeable layer 7. The horizontal load applied to the assembly 3 via the water permeable layer 7 when the vehicle runs or the vehicle runs is dispersed and received by the partition wall 5, so that the assembly 3 collapses to the side. Things don't happen.

In the underground water storage tank A, the rainwater that has fallen on the surface of the ground is introduced through the permeable layer 7 into the water gaps provided in the assembly 3 and the water-permeable layer 6, The rainwater that has infiltrated the layer 6 is introduced into the gap through the water holes 51 provided in the partition wall 5 and stored. Surface water such as rainwater collected in a gutter or the like is directly introduced into the gap via the surface water introduction channel 8. However, when the surface water contains solids such as dead leaves and earth and sand, a solid separation tank, a filtration tank, a sedimentation tank and the like are provided in front of the underground water storage tank A to remove the solids. It is desirable to be able to separate. By doing so, clean water free of solid matter accumulates in the water gap. The water collected in the water gap can be drained through the drain 9 as needed.

Such an underground water storage tank A can be used to avoid a situation in which the water level of an urban river suddenly rises and causes flooding when it is hit by a torrential rain. For example, the pool 1 is emptied in advance by a warning of a torrential rain, and while the water level of the river is rising due to the torrential rain, a part of the rainwater flowing over the surface of the ground and flowing into the river is used as the water. If the water in the reservoir space 1 is allowed to flow into the reservoir space 1 and temporarily stored, and the water level of the river falls due to the torrential rainfall, the water in the reservoir space 1 is discharged to the river. Floods due to ascent can be avoided. When an emergency such as a fire is required, the water stored in the water storage space 1 can be pumped up and used as fire protection water. Usually, the sump space 1
Can be used for watering plants and the like, and for that purpose, it is preferable to separately draw out a water fetching port from the water storage space 1.

Further, as in the above-described underground water storage tank A, the above-mentioned assembly 3 is divided into right and left, and the left and right
If a water-permeable layer 6 made of a collection of small solids such as crushed stones is formed in the space sandwiched between the partition walls 5 and 5, the scale of one aggregate 3 is reduced to an appropriate scale. So that
The partition wall 5 not only ensures the effect of fixing the stacking member 4 so as not to be displaced,
The workability of the stacking member 4 is also improved. Also, when water moves from the sump gap of the left aggregate 3 to the sump gap of the right aggregate 3 through the water passage layer 6 between the partition walls 5 and 5. The water passage layer 6 exerts a water purifying function as a filter. For this reason, if the water-permeable layer 6 is formed of charcoal or a special mineral, the water taken out from the water-storage space of the right-side assembly 3 can be effectively used according to the degree of purification. Will be possible.

[0038]

According to the present invention, since the side walls of the individual stacked members become vertical, a large counterforce is exerted against a vertical downward load applied to the stacked members. For this reason, it is easy to secure sufficient strength enough to support the water-permeable layer disposed over the opening at the ground surface of the water reservoir space formed concavely in the ground from below. It is possible to provide a stacking member for an underground water storage tank. In addition, it is possible to provide a stacking member for an underground water storage tank that can be assembled into a polygonal cylindrical body at a construction site and that can be transported or stored in a bulkless shape.

[Brief description of the drawings]

FIG. 1 is a partially omitted longitudinal sectional view schematically showing an underground water storage tank constructed using a stacking member according to an embodiment of the present invention.

FIG. 2 is a plan view schematically showing an underground water storage tank.

FIG. 3 is an explanatory view showing a part of an underground water storage tank.

FIG. 4 is an explanatory view showing another part of the underground water storage tank.

FIG. 5 is a perspective view of the divided body as viewed obliquely from above.

FIG. 6 is a perspective view of the divided body as viewed obliquely from below.

FIG. 7 is a perspective view of the stacking member as viewed obliquely from above.

FIG. 8 is a perspective view of the stacking member viewed from obliquely below.

FIG. 9 is a partial plan view showing an engaging portion and an engaged portion.

FIG. 10 is a cross-sectional view for explaining the operation of the positioning piece.

FIG. 11 is an explanatory view of a state where the divided bodies are overlapped in a fitting manner.

FIG. 12 is a partial plan view showing a stacking member according to another embodiment of the present invention and a state in which the stacking members are arranged.

FIG. 13 is an explanatory view of a state where divided bodies for forming the stacking member of FIG. 12 are overlapped in a fitting manner.

[Explanation of symbols]

 A For underground water storage tank 1 Water storage space 4 Stacking member 42 Water passage 41 Side wall 40 Divided body 43 One edge 44 The other edge 45 Engagement part 46 Engagement part 47 One end side part 48 The other end side Side 53, 54 Supporting surface 56 Rib 55 Positioning piece

Claims (6)

[Claims] 1. A stacking member which is arranged side by side in a water reservoir space formed in a concave shape in the ground and is vertically stacked, having a plurality of side walls provided with a large number of water passage openings, and It consists of a pair of symmetrical synthetic resin divided bodies that form a hollow polygonal cylindrical body having a plurality of vertical side walls and forming a polygon in a plan view by facing each other. An engaging portion and an engaged portion are provided so as to be connectable to each other by being distributed to one edge corresponding to the dividing portion and the other edge, and are provided in the axial direction of the polygonal cylindrical body. A support surface is provided over the entire length of each of the one end side and the other end side of each of the divided bodies, and the lower side is located between the two divided bodies stacked vertically. On the support surface provided on the side on the other end side of the divided body of
A stacking member for an underground water storage tank, wherein the support surfaces provided on a side portion on one end side of an upper divided body are formed so as to overlap with each other. 2. A stacking member for an underground water storage tank according to claim 1, wherein said divided body has two side walls orthogonal to each other. 3. The stacking member for an underground water storage tank according to claim 1, wherein said divided body has three side walls continuously connected at an opening angle larger than 90 degrees. 4. The engaging portion is an engaging groove provided over the entire length of one edge of the divided body, and the engaged portion is formed on one edge of the divided body. 4. The engaging projection according to claim 1, wherein the engaging projection is provided over the entire length and is engageable only by sliding in the axial direction of the polygonal tubular body in the engaging groove. A stacking member for an underground water storage tank according to any one of the above. 5. A rib extending in the axial direction of the polygonal cylindrical body is provided on each of the plurality of side walls, and is provided on each of the entire lengths of the one end side and the other end side of the divided body. Support surfaces are formed by the surfaces of the flange portions provided on each of the side portions, and one end of the rib is connected to the flange portion provided on the one end side of the divided body. The other end portion of the rib is connected to a flange portion provided on a side portion on the other end side of the divided body, in any one of claims 1, 2, 3, and 4. Stacking member for the described underground water tank. 6. A positioning piece protruding from an edge on one end side of the divided body is fitted into an edge on the other end side of another divided body on which the divided body is stacked. , Claim 2,
The stacking member for an underground water storage tank according to any one of claims 3, 4, and 5.