JPH0931955A - Laying structure for underground drainage material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily secure continuous drainage spaces for joints of an underground drainage material and facilitate the installation works therefor. SOLUTION: An underground drainage material 12 constituting the laying structure 10 thereof is composed of a drainage material body 13 and non-woven cloth sheets 13 stuck to the upper and lower faces thereof respectively. The non-woven cloth 13 is fitted so as to stretch by a specified length from the end of the downstream side of the drainage material body 13, when the drainage materials 12 are laid one by one in the flowing direction X of the underground seepage water. In this laying structure, a number of underground drainage materials 12 are laid by turns in the flowing direction X of the underground water, while connecting the materials 12 so as to put inside the upper end of the underground drainage material 12 positioned at the downstream side of the flow from the upper and lower sides by use of respective non-woven cloth sheets 13 of the part 14 stretched from the downstream end of the underground drainage material 12 positioned in the upstream side of the flow.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for laying underground drainage material, and in particular, it is an underground structure that is laid in a planar manner so that water that has penetrated underground flows down in a predetermined direction and is drained. Concerning the laying structure of drainage materials.

[0002]

2. Description of the Related Art For example, in a baseball field, a soccer field, or other competitive gounds, it is necessary to promptly remove rainwater that has fallen in the rain to make these gounds ready for use. And, in order to promptly remove the rainwater that has poured down without causing pools on the ground surface, it is necessary to quickly remove the rainwater that has penetrated underground, so these grounds usually have a predetermined ground level. By arranging a drainage material having a water-passing function in a plane at a depth, the permeated rainwater is made to flow down in a predetermined direction through the underground drainage material so as to be collected and eliminated. Also, on the railroad floor and the surface layer of the embankment,
It is necessary to promptly drain the rainwater that has poured onto the ground surface in a planar manner.

Since it is difficult to cover a wide area at once with a single drainage material, the drainage material thus disposed underground has a predetermined size suitable for construction and transportation. By using a divided underground drainage material and arranging a plurality of the underground drainage materials at a predetermined gradient which allows the underground permeated water to flow down, the surface of the gland or the like is covered from below to be laid in a planar shape.

Further, when a plurality of underground drainage materials are connected and arranged at a predetermined gradient in this way, the connection portion of the adjacent underground drainage materials is arranged so that the underground seepage water can flow down quickly. In the above, since it is preferable that the water passage space secured by the underground drainage material is continuous, in order to maintain such continuity, conventionally, as shown in FIG.
A configuration has been adopted in which the underground drainage material 40 is laid while sandwiching the connection portion 41 from above and below with a pair of joint sheets 42 made of, for example, a nonwoven fabric.

[0005]

However, according to the conventional method in which the connecting portion 41 is continuously laid while being sandwiched from above and below by the pair of sheets 42 for joint,
Since the drainage direction is a narrow longitudinal direction and a large number of drainage materials need to be arranged in parallel, there is a problem that it is not easy to ensure continuity of the water passage space by the underground drainage material 40.

In addition to the underground drainage material 40, the work of accurately positioning and arranging the seat 42 for the joint is troublesome, and since the seat 42 easily moves during other work, There was a problem that it was inconvenient to handle.

Further, since it is difficult to accurately dispose the drainage members 40 and 41, there is a problem that it is difficult to secure the water flow of the vertical drain.

Therefore, the present invention has been made in view of such a conventional problem, and it is possible to easily ensure the continuity of the water passage space at the connecting portion of the underground drainage material and to facilitate the laying work. The purpose of the present invention is to provide a structure for laying underground drainage that can be performed.

Another object of the present invention is to provide an underground drainage laying structure capable of easily ensuring the flow of vertical water.

[0010]

The present invention has been made in order to achieve the above-mentioned object, and its gist is to connect water infiltrating underground in a predetermined direction so that the water permeates underground and drains. A structure for laying underground drainage material that is laid down in a planar manner, wherein the underground drainage material is configured by attaching sheet members to the upper and lower surfaces, respectively, and the sheet members flow down the underground drainage material. When installing these underground drainage materials by extending from the downstream side end, the upper end part of the underground drainage material located on the downstream side in the downflow direction is attached to the underground drainage material located on the upstream side in the downflow direction. Further, there is provided an underground drainage laying structure in which underground drainage materials are laid while being connected and arranged so as to be sandwiched from above and below by the extension portions of the respective sheet members.

Further, according to the present invention, it is preferable that the underground drainage material is constituted by a corrugated plate having concave and convex grooves extending in the downflow direction.

Further, according to the present invention, a nonwoven fabric is used as a sheet member attached to each of the upper and lower surfaces of the underground drainage material,
It is also possible to give a double-sided drainage function to the underground drainage material, also, using a non-woven fabric as a sheet member attached to the upper surface of the underground drainage material, using a water-impervious sheet as a sheet member attached to the lower surface, One side drainage function can be added to the underground drainage material.

Furthermore, in the underground drainage laying structure according to the present invention, the upper end portion of the underground drainage located on the downstream side in the downflow direction is attached to the underground drainage material located on the upstream side in the downflow direction. At the connection portion of the underground drainage material, which is connected so as to be sandwiched from above and below by the extension portion of the sheet member, perforated pipes extending in the direction intersecting the downflow direction are arranged on the downstream side and the upstream side. It is preferable to lay the underground drainage material while arranging it between the ends of both underground drainage materials.

Further, according to the underground drainage laying structure of the present invention, since one side of the extending sheet member is fixed, it is difficult to move, and one side is not fixed, so that the upper end portion of the underground drainage material can be easily Since it can be inserted, the continuity of the water passage space at the connection part of the underground drainage material can be easily ensured compared to the conventional method of sandwiching the connection part with a sheet for joint, which is separate from the underground drainage material. ,
In addition, construction is easy.

Further, if the underground drainage material is constituted by a corrugated plate having a concave and convex groove extending in the downflow direction of the underground permeated water, the rainwater that has permeated underground is not collected at one place, so that the accumulation of water on the ground surface is unlikely to occur. Uniform drainage can be performed.

Further, if a nonwoven fabric is used as a sheet member attached to each of the upper and lower surfaces of the underground drainage material, and the double-sided drainage function is imparted to the underground drainage material, the consolidated water in the embankment is used as the consolidated drainage material. Can be used for drainage of soil and to prevent sludge on the railroad floor, and a non-woven fabric is used as the sheet member attached to the upper surface of the underground drainage material, and a water barrier sheet is used as the sheet member attached to the lower surface. If the underground drainage material is given a one-sided drainage function, surface water can be completely drained and prevented from penetrating into the lower layer. Also,
Rainwater can be easily collected by collecting permeated water and storing it.

Furthermore, the upper end portion of the underground drainage material located on the downstream side in the flow-down direction is sandwiched from above and below by the extension portion of each sheet member attached to the underground drainage material located on the upstream side in the flow-down direction. A perforated pipe extending in a direction intersecting with the downflow direction is arranged between the ends of both the underground drainage materials arranged on the downstream side and the upstream side at the connection portion of the underground drainage material that is connected and connected. However, if underground drainage material is laid, the water flowing into the perforated pipe that reaches the connection part will flow down along this perforated pipe, and the flow of vertical water for removing underground permeated water will occur. Can be easily secured.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments, ie, embodiments of the present invention will be described below in detail with reference to the accompanying drawings. An underground drainage laying structure 10 according to an embodiment of the present invention shown in FIGS. 1 (a) and 1 (b) is, for example, for promptly discharging rainwater that has fallen on the surface of the ground 30 and has penetrated into the ground. It consists of underground drainage material 11 buried in a relatively shallow portion just below the ground 30, and this underground drainage material 11 is a plate-shaped unit underground drainage material 12 divided into a size suitable for transportation and construction. By arranging and arranging a large number of the permeated water side by side in the vertical and horizontal directions at a gradient that allows the permeated water to flow down, the entire area of the gland 30 is covered from below.

That is, the unit underground drainage material 12 constituting the laying structure 10 is composed of the drainage material body 17 and sheet-like nonwoven fabrics 13 attached to the upper and lower surfaces thereof, respectively. In the case where the unit underground drainage materials 12 are sequentially laid in the downflow direction X of the underground permeated water,
A predetermined length from the downstream end of the drainage material body 17, for example, 5 cm
It is attached so as to extend to the downstream side.
In this embodiment, as the water-permeable sheet member, the one made of the non-woven fabric 13 is used, but a sheet member made of a woven cloth, a net-like material or the like can also be used.

Therefore, the laying structure 10 of this embodiment
When laying the above-mentioned unit underground drainage material 12, the unit underground located at the downstream side in the downflow direction is defined by each nonwoven fabric 13 of the extension portion 14 from the downstream end of the unit underground drainage material 12 located at the upstream side in the downflow direction. While the upstream portion of the drainage material 12 is sandwiched from above and below and connected to each other, a large number of unit underground drainage materials 12 are sequentially laid in the direction X of groundwater flow.

That is, according to the laying structure 10 of this embodiment, in the connecting portion between the adjacent unit underground drainage materials 12,
The unit underground drainage material 1 is formed by the non-woven fabrics 13 above and below the extension portion 14 without requiring a separate member for the joint.
Laying work can be performed easily while sandwiching the end of 2 and it is convenient to transport as a roll and it is difficult to cut when the ground is deformed, so the unit basement at the connection part after laying It is possible to easily ensure the continuity of the water passage space of the drainage material 12, which facilitates the flow of underground permeated water to increase the amount of drainage.

The drainage material body 17 constituting the unit underground drainage material 12 is made of a synthetic resin such as polyethylene, nylon, polypropylene, vinyl chloride or the like, which is formed into a plate shape by entwining a hard filamentous material in a loofah shape. , A plate-shaped resin molded product formed into a sponge having a large number of continuous bubbles, or a corrugated plate, by having a strength that is not crushed by the weight of the upper layer of sand and the load from the ground, It is possible to use various drainage materials that have the function of easily holding the interstitial layer as a water-passing space in the ground, and the thickness of the drainage material is designed appropriately in consideration of the permeability coefficient of the ground and the amount of rainfall. However, in this embodiment, a corrugated plate made of synthetic resin having a thickness of, for example, about 3 to 5 mm as shown in FIG. To extend To slide into laying. in this way,
By using the drainage body 17 made of a corrugated plate as the unit underground drainage material 12, it is possible to prevent the water that would be collected by a slight gradient change from collecting at one location.

Further, in this embodiment, the unit underground drainage material 1
Non-woven fabric 13 is attached on both upper and lower sides of 2 and underground drainage material 11
Since it has a double-sided drainage function, it is possible to collect infiltrated rainwater from above and collect water that has accumulated underground from below.

On the other hand, FIGS. 2A and 2B show an underground drainage laying structure 20 according to another embodiment of the present invention. According to this embodiment, this laying structure 20 is used. As the unit underground drainage material 12 to be formed, a sheet-shaped non-woven fabric 13 is attached to the upper surface, and a water impermeable sheet 21 made of, for example, synthetic resin is attached to the lower surface. That is, according to this embodiment, since the underground drainage material 11 has the one-sided drainage function, it is possible to collect rainwater that has permeated underground and has no turbidity. By storing this water, it can also be used as tap water for car washing.

Further, FIG. 3 shows a third embodiment of the present invention. According to this embodiment, the upper end portion of the unit underground drainage material 12 located on the downstream side is a unit located on the upstream side. The connection portion 1 of the unit underground drainage material 12 configured so as to be sandwiched from above and below by the nonwoven fabric 13 attached to the underground drainage material 12 and the extension portion 14 of the water blocking sheet 21.
In 5, the underground drainage material is arranged while arranging a perforated pipe 16 extending in a direction intersecting with the downflow direction X of the underground permeated water between the ends of both the upstream and downstream unit underground drainage materials 12 that are connected. 11 is laid.

That is, according to the laying structure 22 of this embodiment, a part of the underground permeated water which reaches the connecting portion 15 by flowing down through the water passage space by the unit underground drainage material 12 is arranged in the connecting portion 15. It flows into the inside of the perforated pipe 16 that has been formed, and flows down along the perforated pipe 16 in a direction intersecting with the downflow direction X, whereby the underground drainage material 11 arranged underground Therefore, it is possible to easily secure the flow of vertical water for removing underground permeated water.

As the perforated pipe 16 arranged in the connecting portion 15, for example, a hollow pipe made of a synthetic resin such as vinyl chloride having a large number of holes formed in its outer peripheral surface can be used. The size of the hole and the size of the pipe are appropriately designed in consideration of the hydraulic conductivity of the ground, the amount of rainfall, and the like, but in this embodiment, a diameter of about 30 to 50 mm having a large number of holes of about 3 mm is used. Hollow pipes are used.

In this embodiment, the case where the present invention is applied when the ground drainage is performed has been described, but the present invention is not limited to this embodiment,
It can be used by installing it in various types of ground that require plane drainage, such as the surface layer of embankments and the railroad track.

[0029]

As described in detail above, according to the underground drainage material laying structure of the present invention, the underground drainage material is constructed by attaching sheet members to the upper and lower surfaces thereof, respectively. When laying these members by extending from the downstream side end of the underground drainage material and installing these underground drainage materials, the upper end part of the underground drainage material located on the downstream side in the downstream direction is located on the upstream side in the downstream direction. Since the underground drainage material is laid while connecting and arranging it so that it is sandwiched from above and below by the extension parts of each sheet member attached to the underground drainage material, continuity of the water passage space at the connection part of the underground drainage material Can be easily secured, and the laying work can be easily performed.

Further, if the underground drainage material is constituted by a corrugated plate having concave and convex grooves extending in the downflow direction of the underground permeated water, uniform water collection is possible and water is not collected at one place, so that it collects on the surface. You can avoid water.

Further, if non-woven fabric is used as the sheet member attached to each of the upper and lower surfaces of the underground drainage material and the double-sided drainage function is imparted to the underground drainage material, it will cause the sludge due to repeated load. Separated water can be drained or water that has been dewatered by consolidation can be drained, and a non-woven fabric as a sheet member attached to the upper surface of the underground drainage material, and a water-blocking sheet as a sheet member attached to the lower surface. If a single-sided drainage function is added to the underground drainage material, a large amount of rainwater that has permeated underground can be collected without permeating to the lower layer.

Furthermore, at the connection portion of the underground drainage material arranged continuously in the downflow direction, a perforated pipe extending in a direction intersecting with the downflow direction is provided at the end portions of both the upstream and downstream underground drainage materials. By laying an underground drainage material while arranging it between them, it is possible to easily secure the flow of vertical water to efficiently remove the underground permeated water, thereby treating a large amount of underground permeated water. It will be possible.

[Brief description of drawings]

FIG. 1 (a) is a vertical cross-sectional view showing the structure of an underground drainage laying structure according to an embodiment of the present invention, and FIG.
It is a transverse cross-sectional view along AA of (a).

FIG. 2 (a) is a vertical cross-sectional view showing the structure of an underground drainage laying structure according to another embodiment of the present invention, and FIG.
It is a transverse cross-sectional view along BB of (a).

FIG. 3 is a vertical cross-sectional view showing the structure of an underground drainage material laying structure according to a third embodiment of the present invention.

FIG. 4 is a schematic plan view illustrating a configuration of a conventional underground drainage laying structure.

[Explanation of symbols]

 10, 20, 22 Laying structure 11 Underground drainage material 12 Unit underground drainage material 13 Nonwoven fabric (sheet member) 14 Extension portion 15 Connection portion 16 Perforated pipe 21 Water-impervious sheet (sheet member) 30 Ground

Claims (5)

[Claims] 1. A laying structure of underground drainage material, which is laid in a plane in a continuous manner so as to flow down water permeating underground in a predetermined direction to drain the water. , The upper and lower surfaces are respectively attached with sheet members, and each sheet member is extended from the downstream end of the underground drainage material and attached, and when laying these underground drainage materials, While arranging the upper end portion of the underground drainage material located on the downstream side so as to be sandwiched from above and below by the extension portion of each sheet member attached to the underground drainage material located on the upstream side in the flowing direction, the underground drainage material An underground drainage laying structure characterized by laying 2. The underground drainage laying structure according to claim 1, wherein the underground drainage material is constituted by a corrugated plate having concave and convex grooves extending in the downflow direction. 3. The underground drainage material has a double-sided drainage function by the sheet members attached to the upper and lower surfaces of the underground drainage material being made of a non-woven fabric.
Alternatively, the underground drainage laying structure according to 2 is provided. 4. The underground drainage material, wherein the sheet member attached to the upper surface of the underground drainage material is made of non-woven fabric, and the sheet member attached to the lower surface of the underground drainage material is a water blocking sheet. 4. The underground drainage laying structure according to any one of claims 1 to 3, wherein the one-sided drainage function is provided. 5. The upper end portion of the underground drainage material located on the downstream side in the flow-down direction is sandwiched from above and below by the extension portion of each sheet member attached to the underground drainage material located on the upstream side in the flow-down direction. While arranging a perforated pipe extending in a direction intersecting the downflow direction at the connection portion of the underground drainage material that is connected and arranged, between the end portions of both the underground drainage materials arranged on the downstream side and the upstream side. The underground drainage material laying structure according to any one of claims 1 to 4, wherein an underground drainage material is laid.