WO2013133179A1

WO2013133179A1 - Slope ground drainage structure and method for constructing same

Info

Publication number: WO2013133179A1
Application number: PCT/JP2013/055723
Authority: WO
Inventors: 良介江守; 岩佐　直人; 吉田　幸司; 剛男原田
Original assignee: 日鐵住金建材株式会社
Priority date: 2012-03-08
Filing date: 2013-03-01
Publication date: 2013-09-12
Also published as: TW201337068A; JP2013185358A; TWI551750B; JP5950629B2

Abstract

On a slope (1), a midrib drainage (2) is installed in a vertical direction of the slope. A lateral vein pipe (3), part of which is exposed from the ground surface, is connected to the midrib drainage in a descending slope from a horizontal direction of the slope. A water collection pipe (4) that has a water collecting hole (4a) is inserted into the ground, and an end portion is connected to the lateral vein pipe. A surface water collection port (8a) that is capable of collecting water flowing down from an upper side of the slope is installed in the lateral vein pipe. Rainwater flows from the surface water collection port of the lateral vein pipe into the lateral vein pipe. Osmosis water inside the ground flows through the water collection pipe into the lateral vein pipe. Both the surface water and the osmosis water are excluded from the slope ground after flowing into the midrib drainage and flowing downward, and can be excluded effectively. Drainage of the osmosis water is performed by the midrib drainage and lateral vein pipe which is common to surface water collection means. Therefore, efficiency can be high and manufacturing costs can be reduced.

Description

Drainage structure of slope ground and its construction method

This invention relates to the drainage structure of the slope ground for preventing the slope in embankment, cutting, etc. from collapsing due to the action of water, and its construction method.

Rain that falls on slopes due to embankments and cuts erodes the slopes when they flow down. Moreover, there are very many cases where the seepage water that has penetrated into the soil due to rain or the like causes the slope failure.
For this reason, on the slopes such as embankments and cuts, ground surface drainage works that exclude surface water are often constructed (see Patent Document 1 etc.), and seepage water that has penetrated into the soil. In many cases, a groundwater drainer that collects and drains water is constructed (see Patent Document 2, etc.).

Patent Document 1 is a vertical slope drainage structure that allows rainwater accumulated from the slope surface to flow down the slope, but on the side slope of a road that has been built by embankment or cutting, the upper part of the slope or the middle of the slope It is assumed that the rainwater collected in the water collecting basin established in will be drained into the water collecting basin below.

Patent Document 2 is a method of driving a plurality of drainage pipes provided with a large number of drain holes into an inclined surface so that the outer end exposed to the horizontal or the outside (slope) is slightly downward. The permeated water in the soil is taken into the pipe from the drain hole of the drain pipe and drained from the outer end exposed to the outside (slope), thereby preventing the slope from collapsing due to water.

JP 2003-313875 A JP 2003-155737 A

As described with reference to Patent Document 1, it is not possible to eliminate rainfall over a wide range of slopes only by the slope drainage structure in the vertical direction of the slope, that is, the vertical drainage groove. Therefore, rainwater that has not been removed penetrates and accumulates in the ground, and the accumulated seepage water causes slope failure.
However, a construction method is known in which a lateral groove so-called small drainage groove is provided on the slope, and this is connected to the vertical drainage groove so as to eliminate rainfall over a wide range of the slope. However, the slope drainage structure with the vertical drainage channel and the small drainage channel is effective in preventing the erosion of the slope, and can reduce the infiltration of rainwater into the soil, but eliminate the infiltrated water in the soil. I can't. Therefore, rainwater that has not been removed penetrates and accumulates in the ground, and the accumulated seepage water causes slope failure.

The method of driving a plurality of drainage pipes with drain holes on the slope as described with reference to Patent Document 2 is not sufficient as a means for removing permeated water in the soil by itself. That is, even if the permeated water in the soil is taken in by the drain pipe and discharged to the outside, that is, the slope, the water discharged to the slope erodes the slope. Moreover, if the slope is covered with sprayed concrete or the like in order to prevent the erosion of the slope, the slope cannot be vegetated.

It is conceivable to construct both the above-mentioned method of installing the vertical drainage groove and the method of constructing the drainage pipe with drain hole, but even if the two methods are constructed on the same slope, It is not necessarily an effective and practical construction method in terms of various points such as performance, construction cost and drainage performance.

The present invention was made based on the above background, and mainly intended for slopes such as embankments and cuts. Both surface water and permeated water can be effectively eliminated, and workability, construction cost, drainage performance, etc. It aims at providing the drainage structure of the slope ground excellent in various points.

The slope ground drainage structure of the invention according to claim 1 that solves the above-mentioned problems,
The main vein drainage channel that has the vertical direction of the slope is installed on the slope, and the side vein pipe that is connected to the main vein drainage channel in a manner that descends from the lateral direction of the slope with respect to the main vein drainage channel is at least partially from the ground surface A water collecting pipe that is installed in an exposed manner and has a plurality of water collecting holes on the outer peripheral surface is inserted horizontally or slightly upward from the slope into the ground, and the end of the water collecting pipe on the ground surface side is inserted into the side vein pipe. Connected,
The side vein pipe is provided with a surface water collecting port that is open to the ground surface and capable of collecting water flowing down from above the slope on the upper side of the radial slope.

Claim 2 is the drainage structure of the slope ground according to claim 1, wherein the side vein pipe is installed so as to be able to deposit by receiving earth and sand flowing down from the upper side of the slope in such a manner that at least a part projects from the ground surface. It is characterized by.
In the above, “capable of catching earth and sand” means that at least a part of the side pipe protrudes from the ground surface and the height is secured, and the side pipe moves, for example, by a pile or the like below the slope. This includes not being done.

Claim 3 is characterized in that, in the drainage structure of the slope ground according to

claim

1 or 2, a bearing plate is attached to a connecting portion of the water collecting pipe with the side pipe.

Claim 4 is the drainage structure of the slope ground according to any one of claims 1 to 3, characterized in that the side vein pipe is installed such that a part of its cross section is buried in the soil.

A fifth aspect of the present invention is the slope ground drainage structure according to any one of the first to fourth aspects, wherein the surface water collecting port is provided in a short pipe attached to a hole formed in the side vein pipe. And

A sixth aspect of the present invention is the slope ground drainage structure according to any one of the first to fifth aspects, wherein the side vein pipe moves to the lower slope side adjacent to the lower radial slope side of the side pipe. It is characterized in that a pile for prevention is placed.

A seventh aspect of the present invention is the slope ground drainage structure according to any one of the first to sixth aspects,
One or more rod-like members are stacked on the side vein pipe.

An eighth aspect of the present invention is the slope ground drainage structure according to any one of the first to seventh aspects, wherein the side pipe is a ground side half having a connection hole to which an end portion of the ground surface side of the water collecting pipe is connected. It is characterized by a split structure divided into a body and an outer half on the opposite side.

The invention of claim 9 is a slope ground drainage construction method for constructing the slope ground drainage structure according to any one of claims 1 to 8,
When installing the side pipe and the water collection pipe, a connection hole for connecting the water collection pipe corresponding to each water collection pipe to be connected to each side pipe is opened in each side pipe,
For each side pipe, each water collecting pipe to be connected to each side pipe is inserted into the ground at a preset insertion position,
Next, install each side pipe on the slope so that the ground surface side end of each water collection pipe inserted into the ground enters each connection hole of the side pipe. The end on the surface side is connected to a side pipe.

Invention of Claim 10 is the construction method of the drainage structure of the slope ground at the time of constructing the drainage structure of the slope ground of Claim 8,
When installing side pipes and water collection pipes, for collecting water pipes corresponding to each water collection pipe to be connected to each side pipe on the ground half of each side pipe that has a split structure Open the connection hole of
For each side pipe, each water collecting pipe to be connected to each side pipe is inserted into the ground at a preset insertion position,
Next, the ground side half of each side pipe is inclined so that each ground hole side end of each water collecting pipe inserted into the ground enters each connection hole of the ground side half of the side pipe. Installed on the
Next, the outer half of each side pipe is covered and joined to the ground half to be integrated.

In the present invention, rain that falls on the slope flows down the slope, enters the side pipe from the surface water collecting port of the side pipe that is at least partially exposed from the ground surface, and flows in the side pipe. It flows into the main drainage channel that forms the vertical direction of the slope, flows down in the main drainage channel, and drains into a drainage channel provided at the lower part of the slope, for example.
Therefore, the erosion of the slope by the surface water at the time of rainfall can be prevented effectively. In addition, since the amount of rainwater that penetrates into the ground during rainfall is reduced, the amount of seepage water that causes slope collapse can be reduced.

In addition, infiltrated water in the ground such as rainwater that has penetrated into the slope ground is taken into the collecting pipe through the collecting hole of the collecting pipe, and along the collecting pipe that goes to the side pipe with a horizontal or slight downward slope. It flows into the side vein pipe, flows through the descending side vein pipe, flows into the main vein drainage channel, flows down through the main vein drainage channel as described above, and is drained to the drainage channel below the slope.
In this way, the permeated water in the ground is collected by the collecting pipe, but the water is not drained to the ground surface, but is drained to the lower part of the slope through the side vein pipe and the main drainage channel. The water collected from the water collecting pipe does not simply flow into the surface of the slope and penetrate into the ground again, and the slope is not eroded.

As described above, according to the present invention, both surface water and permeated water on the slope ground can be effectively excluded.
And the drainage of the osmotic water in the slope ground to the lower part of the slope is performed using the side pipe and main drainage channel common to the surface water collecting means, so it is extremely efficient and has good workability, and low Cost construction is possible. As described above, the present invention effectively combines the ground surface drainage for draining the surface water of the slope ground and the groundwater drainage for draining the seepage water inside the ground in various aspects.
Further, only the main drainage channel and the side pipes cover the slope, and the area covered with them is small, so that sufficient vegetation can be performed on the slope.

The water collecting pipe inserted into the slope ground acts to reinforce the slope ground by acting in the same way as the reinforcing steel in the reinforcing bar insertion reinforcement earth method. When the bearing plate is attached to the connecting portion, the bending / pulling resistance of the water collecting pipe can be more effectively exhibited by the bearing pressure of the bearing plate, and small-scale collapse of the ground surface layer can be prevented more effectively.

According to claim 2, the rain that has fallen on the slope flows down the slope and is blocked by the ground protruding portion of the side pipe that protrudes at least partially from the ground surface, to the surface water collecting port of the side pipe. Directly or after flowing along the side pipe that is descending slope, it reaches the surface water collecting port of the side pipe and enters the side pipe from the surface water collecting port. Drained into a drainage channel provided in
In addition, after construction, earth and sand flowing down the slope due to rainfall and other reasons are blocked by the side pipe projecting from the ground surface and deposited on the upper part of the slope of the side pipe. It is a soft earth and sand with many gaps, usually not containing humus and fallen leaves. Therefore, the rainwater that has flowed down the slope during the rain and reached the sedimentary sediment easily penetrates to the lower part (bottom portion) of the sedimentary sediment and enters the lateral pipe from the surface water collecting port of the lateral pipe. Soft sediments are suitable for efficiently collecting rainwater that has fallen on the slope, and high surface water collection performance can be realized at a very low cost.
In addition, the accumulated sediment deposited on the upper part of the slope of the side pipe after construction is usually soft soil including humus and fallen leaves, so the deposited sediment is particularly suitable for vegetation.

If the side pipe is installed in such a manner that a part of its cross section (for example, a semicircular part) is buried in the soil as in claim 4, particularly when the main drainage channel has a groove shape, The internal water can be smoothly flowed into the groove-shaped main drainage channel without impairing the function of depositing, and the connection structure with the groove-shaped main vein drainage channel is simplified and the connection work is facilitated. be able to.
Also, because part of it is buried in the soil, it acts to resist the movement of the side vein pipe to the lower side of the slope, so if the slope is gentle, the side pipe is It is possible to omit the means for preventing the downward movement.

When a pile for preventing the side vein pipe from moving to the lower slope side is placed as in claim 6, the side pipe is moved to the lower slope side, particularly when the slope slope is steep. It can be surely prevented.

If a rod-like member such as thinned wood is stacked on the side vein pipe as in claim 7, the amount of sediment that accumulates sediment flowing down from the upper side of the slope can be increased, and the surface water is collected. Water function can be improved.
When stacking rod-shaped members, it is particularly effective to drive piles as in claim 6.

As in claim 8, when the side pipe is divided into two parts, that is, the ground half and the outer half on the opposite side, each half can be overlapped during transportation and storage, and is not bulky. Easy to transport and store.
In addition, when installing the side pipe and the water collection pipe, the end of the water collection pipe is connected and fixed to the side pipe after the water collection pipe is inserted into the ground in advance as in claim 10. Can do. At the time of the fixing work, only the semicircular ground side half is provided, and the portion for fixing the water collecting pipe is opened, so that it can be fixed by simple fixing means, and the workability is good.

It is a typical top view of the slope which constructed the drainage structure of the slope ground of a 1st embodiment of the present invention. (A) is an AA enlarged sectional view of FIG. 1, and (b) is a BB sectional view of (a). FIG. 2 is an enlarged CC sectional view showing a detailed structure of a CC cross section of FIG. 1. FIG. 4 is a plan view of FIG. 3. FIG. 4 is a view corresponding to FIG. 3, showing a second embodiment when the slope of the slope is gentle. FIG. 4 is a view corresponding to FIG. 3, showing a third embodiment in a case where the side vein pipe has a split structure of a ground half and an outer half. FIG. 4 is a view corresponding to FIG. 3, showing a fourth embodiment in a case where the side vein pipe has a split structure, and the side vein pipe is simply placed on the ground surface of the slope. FIG. 2 is a diagram schematically showing various patterns of arrangement of main drainage channels and side pipes, where (a) shows the patterns described in FIG. 1, and (b) to (f) show different arrangement patterns. .

Hereinafter, preferred embodiments of the drainage structure of the slope ground and the construction method thereof according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to the following embodiment. In the drawings of the following embodiments, for convenience of illustration, the dimensional relationship (proportional relationship such as size and distance) of each part does not necessarily match that described.

(First embodiment)
FIG. 1 is a schematic plan view of a slope on which the drainage structure of the slope ground according to the first embodiment is constructed, FIG. 2 (a) is an AA enlarged sectional view of FIG. 1, and (b) is a B- B sectional view, FIG. 3 is an enlarged sectional view taken along the line CC of FIG. 1, and FIG. 4 is a plan view of FIG.
In these drawings, reference numeral 1 indicates a slope ground such as embankment or cut. For example, a U-shaped main drainage groove (main drainage channel) 2 extending in the vertical direction of the slope (the direction along the ground surface 1a of the slope ground 1, the vertical direction in FIG. 1) is installed on the ground surface 1a of the slope ground 1. A side pipe 3 connected to the main drainage groove 2 is installed in such a manner that a downward slope is formed from the lateral direction of the slope (lateral direction in FIG. 1) with respect to the main drainage groove 2.
A lower portion of the slope of the main drainage groove 2 is connected to a drainage channel (not shown), for example.

As shown in FIG. 3, the side vein pipe 3 is installed so that about half (generally a semicircular portion) is buried in the ground. The end of the side vein pipe 3 on the side of the main drainage groove 2 is connected to the main drainage groove 2 in such a manner that it fits into a semicircular notch 2a formed in the main drainage groove 2 as shown in FIG. ing.

As shown in FIG. 3, the end portion on the ground surface side of the water collecting pipe 4 inserted into the ground is connected to the side pipe 3. The water collecting pipe 4 is for taking in the permeated water in the ground and sending it out to the side pipe 3 and has a large number of water collecting holes 4a on the outer peripheral surface. The water collecting hole 4a is preferably not provided near the lower end of the cross section of the water collecting pipe 4, but provided near the top and on the side surface.
In the illustrated example, the water collecting pipe 4 is driven from the slope (ground surface) into the ground slightly upward from the horizontal, and is connected to the side pipe 3 with a slight downward slope as the slope toward the side pipe 3. ing. However, they may be connected horizontally.
The connecting portion between the side vein pipe 3 and the water collection pipe 4 is inserted into the hole 3a opened in the side vein pipe 3 and the end portion of the water collection pipe 4 is inserted by the fixing means 5 schematically shown. Is fixed to the side pipe 3.

A bearing plate 6 is attached to the connection portion of the water collecting pipe 4 with the side vein pipe 3.
In this embodiment, a portion where the side pipe 3 is disposed on the slope is excavated to form a recess (a groove extending in a direction perpendicular to the paper surface) 7 as indicated by a two-dot chain line. The water pipe 4 is inserted into the ground, and the bearing plate 6 is disposed in the recess 7 so that the end of the water collecting pipe 4 passes through the center hole 6a, and then the side pipe 3 is connected to the connection hole 3a. The end of the water collecting pipe 4 is installed in the recess 7 so that the end of the water collecting pipe 4 is passed through, and the end of the water collecting pipe 4 is fixed to the side pipe 3 by the fixing means 5 schematically shown. After that, earth and sand are backfilled in the recess 7.

The side vein pipe 3 is provided with a plurality of surface water collecting ports 8a capable of collecting water that opens to the ground surface 1a and flows down from the upper side of the slope, on the upper side of the radial slope. . The surface water collecting port 8a in the illustrated example is formed by attaching a socket (short tube) 8 made of, for example, rubber, metal, or plastic to the hole 3b opened in the side pipe 3.
Moreover, on the side pipe 3, for example, a rod-like member 11 made of thinned wood is stacked in two stages.
Further, a pile 12 for preventing the side vein pipe 3 from moving to the lower side of the slope is placed on the lower side of the slope in the radial direction of the side pipe 3. In this example, the pile 12 prevents the side pipe 3 and the rod-shaped member 11 from moving downward. In addition, although illustration is abbreviate | omitted, it is good to tie the rod-shaped member 11 to the pile 12 with a wire etc. and to fix.
Since the half of the side pipe 3 protrudes from the ground surface 1a in the illustrated example, it is possible to receive and deposit the earth and sand flowing down from the upper side of the slope due to rainfall or other causes after construction. Further, the height of the rod-shaped member 11 stacked in two steps is sufficiently high, and the amount of sediment (deposition depth) can be earned. A two-dot chain line S shown in FIG. 3 indicates sedimentation earth and sand that will be deposited after construction.

In the slope where the drainage structure is constructed, rainwater flows down the slope during rain, and is blocked by the ground protrusion of the side pipe 3 and reaches the socket 8 (surface water collecting port 8a) of the side pipe 3 directly. Alternatively, after flowing along the downwardly inclined side vein pipe 3, it reaches the socket 8, enters the side vein pipe 3 from the surface water collecting port 8 a, flows through the side vein pipe 3, and flows into the longitudinal direction of the slope to form the main drainage. It flows into the groove 2, flows down through the main drainage groove 2, and is drained, for example, into a drainage channel provided at the lower part of the slope.
Therefore, the erosion of the slope by the surface water at the time of rainfall can be prevented effectively. In addition, since the amount of rainwater that penetrates into the ground during rainfall is reduced, the amount of seepage water that causes slope collapse can be reduced.
Moreover, after construction, the earth and sand flowing down the slope due to rainfall and other causes is blocked by the side pipe 3 and deposited on the upper part of the slope of the side pipe 3. The accumulated earth and sand S deposited there is usually It is a soft earth and sand with a lot of gaps, and it is not tight due to the inclusion of humus and fallen leaves. Accordingly, the rainwater that has flowed down the slope during the rain and has reached the sedimentary sediment S easily penetrates to the bottom (bottom portion) of the sedimentary sediment and enters the lateral conduit 3 from the socket 8 of the lateral conduit 3. Soft sediments are suitable for efficiently collecting rainwater that has fallen on the slope, and high surface water collection performance can be realized at a very low cost.

In addition, infiltrated water in the ground such as rainwater that has permeated into the slope ground 1 is taken into the water collecting pipe 4 from the water collecting hole 4a of the water collecting pipe 4, and along the water collecting pipe 4 having a downward slope in the illustrated example. And then flows into the side pipe 3 and flows through the descending side pipe 3 and flows into the main drainage groove 2 and flows down through the main drainage groove 2 in the same manner as described above. To be drained.
Thus, the permeated water in the ground is collected by the water collecting pipe 4, but the water is not drained to the ground surface, but drained to the lower part of the slope through the side pipe 3 and the main drainage groove 2. Will not erode the slope.

According to this drainage structure, both the surface water and the permeated water on the slope ground can be effectively excluded as described above.
And since the drainage of the permeated water of the slope ground 1 to the lower part of the slope is carried out using the side pipe 3 and the main drainage channel 2 which are common to the surface water collecting means, it is extremely efficient and has good workability. Yes, low-cost construction is possible. As described above, this drainage structure is an effective combination of the ground surface drainage for draining the surface water of the slope ground 1 and the groundwater drainage for eliminating the seepage water inside the ground in various aspects. .
Further, only the main drainage groove 2 and the side pipe 3 cover the slope, and the area covered with them is narrow, so that sufficient vegetation can be performed on the slope. In addition, the accumulated earth and sand S deposited on the upper part of the slope of the side vein pipe 3 after construction is usually soft earth and sand including humus and fallen leaves. Therefore, the accumulated earth and sand part is particularly suitable for vegetation.

Further, the water collecting pipe 4 inserted into the slope ground 1 acts to reinforce the slope ground 1 by acting in the same manner as the reinforcing bars in the reinforcing bar insertion reinforcing earth method, but the side pipe 3 of the water collecting pipe 4 and Since the support plate 6 is attached to the connection portion of the water collection pipe, when the pulling force is applied to the water collection pipe 4 due to the slip of the surface layer, the bending pressure of the water collection pipe 4 is more effectively reduced by the support pressure of the support plate 6. And can effectively prevent a small-scale collapse of the ground surface layer.
In addition, since the end portion of the water collecting pipe 4 is fixed to the side vein pipe 3 by the fixing means 5, the side vein pipe 3 itself can be operated in the same manner as the bearing plate 6.

Moreover, in this embodiment, since the bar-shaped member 11 is piled up on the side pipe 3 in two steps to increase the height, it is possible to increase the deposition amount for depositing sediment flowing down from the upper side of the slope. The water collecting function for collecting surface water can be improved.
However, the side vein pipe 3 is installed in such a manner that about half (semi-circular portion) is buried in the soil and has a certain height for depositing earth and sand. Can also collect the surface water.
In addition, when the half of the side pipe 3 is semi-circularly buried in the soil, as shown in FIG. 2B, the end of the side pipe 3 is connected to the main drainage groove 2. It can be connected to the main vein drainage groove 2 in a manner fitted to the semicircular notch 2a, and is suitable for smoothly flowing water in the side vein pipe 3 into the main vein drainage groove 2. In addition, the side vein pipe 3 can be stably connected to the main drainage groove 2 by simply fitting the side pipe 3 into the semicircular notch 2a, and the connection structure with the main vein drainage groove 2 is simplified and the connection work is facilitated. It can be.

(Second Embodiment)
FIG. 5 shows a second embodiment in which the slope of the slope is gentle.
In this embodiment, since the gradient is gentle, there is little flow of earth and sand, and there is little accumulation, so a bar-like member such as thinned material is not stacked on the side vein pipe 3. Moreover, the pile which prevents the movement to the slope lower side of the side pipe 3 is not provided. Further, no fixing means for fixing the end of the water collecting pipe 4 to the side pipe 3 is provided. Further, no support plate is provided. Other configurations are generally the same as those in the first embodiment, and common portions are denoted by the same reference numerals, and description thereof is omitted.

When the slope slope is sufficiently gentle, the force acting on the side pipe 3 has a small component below the slope, so only about half of the side pipe 3 (semicircular part) is buried in the soil. It is possible to omit a pile or the like that provides sufficient resistance to the side pipe 3 moving to the lower side of the slope and prevents the side pipe 3 from moving to the lower side of the slope.
Further, in the illustrated example, the end of the water collecting pipe 4 is only inserted into the connection hole 3a opened in the side vein pipe 3, and is not fixed to the side vein pipe 3, but it is fixed in this way depending on the situation. It is also possible to omit the means.
However, by fixing the end portion of the water collecting pipe 4 to the side pipe 3, the side pipe 3 itself can be operated in the same manner as the pressure plate, and the side pipe 3 can be moved to the lower side of the slope. It is also possible to prevent the movement.

(Third embodiment)
In the drainage structure of the slope ground 1 shown in FIG. 6, the side vein pipe 23 has a ground side half body 23A having a connection hole 23a to which an end of the ground surface side of the water collecting pipe 4 is connected, and the opposite side. It is a two-part structure divided into the outer half body 23B. In the illustrated side vein pipe 23, the ground side half body 23A and the outer side half body 23B both have a cross-sectional shape having flanges 23c at both ends of the semicircular cross section, and both flanges 23c are opposed to each other with bolts. When joined, the side pipe 23 has a circular cross section.
In this case, the ground-side half 23A, which is the lower half of the side vein pipe 23, is installed in a state where it is buried in the ground, that is, the flanges 23c at both ends of the ground-side half 23A are positioned on the ground surface 1a. . The socket 8 whose end opening is the surface water collecting port 8a is attached to the outer half body 23B.

An example of an outline construction procedure when constructing the drainage structure of the slope ground 1 using the side pipe 23 will be described.
A position where the main drainage groove 2, the side pipe 3 and the water collecting pipe 4 are installed on the slope is set in advance.
A longitudinal groove is excavated along the set position of the main vein drainage groove 2, and the recesses 7 are excavated in a groove shape along the set position of each side vein pipe 3.
For each side pipe 23 to be installed, each water collecting pipe 4 to be connected to each side pipe 23 is inserted into the ground at a preset insertion position.
Next, the bearing plate 6 is placed on the bottom surface (or wall surface) of the recess 7 through the end of the water collecting pipe 4 in the center hole 6a.
Next, the ground-side half 23A is placed on the slope so that the end portions on the ground surface side of the water collecting pipes 4 inserted into the ground respectively enter the connection holes 23a of the ground-side half 23A of the side pipe 23. Install in.
Next, the end of the water collecting pipe 4 is fixed to the ground side half body 23A. In the illustrated example, a nut 25 is screwed and fastened to a screw portion formed on the outer surface of the end portion of the water collecting pipe 4 with a washer 24 having a lower surface extending along the inner surface of the side vein pipe.
Next, the outer half body 23B having the socket 8 attached to the hole 23b is covered with the ground side half body 23A, and the flanges 23c are joined with bolts to form the side pipe 23 having a circular cross section. After that, earth and sand are backfilled in the recess 7.
Next, the pile 12 is driven along the slope lower side of the side vein pipe 23.
Next, the main drainage groove 2 is installed in the longitudinal groove excavated earlier.
Next, an end portion of the side vein pipe 23 on the main vein drainage groove 2 side is connected to the main vein drainage groove 2.
The side vein pipe 23 is constructed by connecting a plurality of short side vein pipes 23 ′ having a short length as shown in FIG. 1. In the case of the above description, the side vein pipe 23 is directly connected to the main drainage groove 2. The short side vein pipe 23 ″ not connected to the water collecting pipe 4 at the end of the main groove drain groove 2 is installed in the circular notch 2a (FIGS. 2A and 2B) of the main vein drain groove 2. And connecting with the adjacent short side pipe 23 '. The short side pipe 23 "at the end is further shorter than the other short side pipes 23'. The area without the water collecting pipe 4 is narrow and has no particular problem.
The above procedure is an example, and the order can be appropriately changed. For example, the main drainage groove 2 may be installed first.

As described above, when the side vein pipe 23 is divided into the half structure 23A divided into the ground side half body 23A and the outer side half body 23B on the opposite side, the half bodies can be overlapped during transportation and storage and are not bulky. So it is easy to transport and store.
As described above, when the side pipe 23 and the water collection pipe 4 are installed, the end of the water collection pipe 4 is connected and fixed to the side pipe 23 after the water collection pipe 4 is inserted into the ground beforehand. Can do. In the fixing operation, only the semicircular ground side half body 23A is provided, and the portion for fixing the water collecting pipe 4 is opened. Therefore, a simple fixing means such as a washer 24 and a nut 25 as shown in FIG. The workability is good.

(Fourth embodiment)
The drainage structure of the slope ground 1 shown in FIG. 7 is a case where the side vein pipe 23 is installed on the slope without being partially embedded in the soil. The side vein pipe 23 in the illustrated example has a split structure of a ground side half body 23A and an outer side half body 23B, similarly to the side vein pipe 23 in FIG.
The other points are substantially the same as those of the third embodiment of FIG. 6, but in the case of the fourth embodiment, the socket 8 is attached to the ground side half body 23A. Further, the bearing plate 6 is placed directly on the ground surface 1 a of the slope ground 1, but a triangular cross-section spacer 30 is interposed in a triangular gap formed between the bearing plate 6 and the side vein pipe 23. And the end part of the water collecting pipe 4 is fixed by screwing and tightening a nut 25 with a washer 24 interposed in the threaded portion of the outer peripheral surface thereof as in FIG.
The other points are substantially the same as those of the third embodiment in FIG.

In this 4th Embodiment, since the side vein pipe 23 is set | placed on the ground surface, the ground protrusion height is high. Therefore, the amount of earth and sand that can be deposited on the upper side of the slope of the side pipe 3 after construction can be increased.
In this case, the rod-like member 11 stacked on the side vein pipe 23 has two steps in the illustrated example, but may be one step or may be omitted.

(Fifth embodiment)
FIG. 8 is a diagram schematically showing various patterns of the arrangement of the main drainage grooves 2 and the side pipes 3, (a) is the pattern described in FIG. 1, and (b) to (f) are respectively Different arrangement patterns are shown. In FIG. 8, reference numeral 3 is attached to the side pipe, but the side pipe 23 shown in FIGS. 6 and 7 is also included.
(B) is the simplest pattern in which one side vein pipe 3 is installed on one side of the main vein drainage groove 2, and this pattern is the basis.
(C) is a pattern in which two side pipes 3 are installed on one side of the main drainage groove 2.
(D) is a pattern in which two side vein pipes 3 are installed on both sides of the main drainage groove 2.
(E) is a pattern in which two side vein pipes 3 connected to one place of the main drainage groove 2 with different slopes are respectively installed on both sides of the main drainage groove 2.
(F) is a pattern in which branch side vein pipes 3 ′ that are downwardly inclined are connected to the side vein pipes 3 in the pattern of (d). A water collecting pipe 4 inserted into the ground is connected to the branch side vein pipe 3 ′ in the same manner as the side vein pipe 3.

In each of the above-described embodiments, for example, as shown in FIG. 3, half or all of the side vein pipe 3 protrudes from the ground surface 1a, but the extent that the surface water collecting port 8a can take in rainwater flowing down the slope. It may be just exposed. Further, in any case where the surface water collecting port 8a is used as the hole 3b or the surface water collecting port 8a is used as the socket 8, the hole 3b or the The socket 8 may be provided with a clogging prevention material such as a filter.
Further, in each of the above-described embodiments, the main drainage channel that forms the vertical direction of the slope is the main drainage channel 2, that is, the groove-shaped main drainage channel, but may be a tubular main channel drainage channel. In the case of the groove shape (main drainage groove 2), a steel groove such as a U-shaped flume made of a corrugated steel sheet, a concrete groove such as a U-shaped side groove of precast concrete, or a resin groove can also be used. In the case of a tubular main vein drainage channel, a steel steel pipe such as a corrugated pipe, or a resin pipe or a concrete pipe can also be used.
A steel pipe such as a corrugated pipe or a resin pipe can be used as the side pipe.

The present invention can effectively eliminate both surface water and permeated water, and can be used as a drainage structure excellent in terms of workability, construction cost, drainage performance, and the like.

1 Slope ground 1a Slope (ground surface)
2 Main drainage ditch (main drainage channel)

2a Semicircular notch

3, 23

Side vein pipe

3a,

23a Connection hole

3b, 23b (Socket is attached) hole 23c Flange 23A Ground side half 23B Outer half 4 Water collecting pipe 4a Water collecting hole 5 Fixing means 6 Support Pressure plate 6a Center hole 7 Recess 8 Socket (short tube)
8a Surface water collection port 11 Rod-like member (such as thinned wood) 12 Pile 24 Washer 25 Nut S (After construction) Sediment

Claims

A main drainage channel is installed on the slope.
The side vein pipe connected to the main vein drainage channel in a mode that forms a downward slope from the lateral direction of the slope with respect to the main drainage channel is installed in a mode in which at least a part is exposed from the ground surface,
A water collecting pipe having a plurality of water collecting holes on the outer peripheral surface is inserted horizontally or slightly upward from the slope into the ground, and the end of the water collecting pipe on the ground surface side is connected to the side pipe.
The side ground pipe is provided with a surface water collecting opening on the radial upper side of the slope, which is capable of collecting water that opens to the ground surface and flows down from the upper side of the slope. Drainage structure.
The slope ground drainage structure according to claim 1, characterized in that the side vein pipe is installed so as to be able to receive and deposit earth and sand flowing down from the upper side of the slope in a manner in which at least a part projects from the ground surface.
The drainage structure for slope ground according to claim 1 or 2, wherein a bearing plate is attached to a connection portion of the water collecting pipe with the side pipe.
The slope ground drainage structure according to any one of claims 1 to 3, characterized in that the side vein pipe is installed such that a part of its cross section is buried in soil.
The slope ground drainage structure according to any one of claims 1 to 4, wherein the surface water collecting port is provided in a short pipe attached to a hole formed in the side vein pipe.
6. A pile for preventing the side pipe from moving to the lower side of the slope is disposed adjacent to the lower side of the slope in the radial direction of the side pipe. The slope ground drainage structure according to any one of the above.
The slope ground drainage structure according to any one of claims 1 to 6, wherein a bar-shaped member is stacked on the side vein pipe in one or more stages.
The side vein pipe has a split structure that is divided into a ground side half body having a connection hole to which an end of the water collecting pipe on the ground surface side is connected and an outer half body on the opposite side. The slope ground drainage structure according to any one of claims 1 to 7, wherein:
A method for constructing a slope ground drainage structure for constructing the slope ground drainage structure according to any one of claims 1 to 8,
When installing the side pipe and the water collection pipe, a connection hole for connecting the water collection pipe corresponding to each water collection pipe to be connected to each side pipe is opened in each side pipe. Every
For each side vein pipe, each water collecting pipe to be connected to each side vein pipe is inserted into the ground at a preset insertion position,
Next, each of the side pipes is installed on a slope so that each end of the water collecting pipe inserted into the ground enters each connection hole of the side pipe, and each side pipe is installed on a slope. The construction method of the drainage structure of the slope ground characterized by connecting the edge part of the ground surface side of a water pipe to the said side vein pipe.
A construction method of the drainage structure of the slope ground when constructing the drainage structure of the slope ground of claim 8,
When installing the side pipe and the water collecting pipe, the ground pipe half of each side pipe that has a split structure corresponds to the water collecting pipe to be connected to the side pipe. Make a connection hole for collecting the water collecting pipe,
For each side vein pipe, each water collecting pipe to be connected to each side vein pipe is inserted into the ground at a preset insertion position,
Next, the ground surface side ends of the water collecting pipes inserted into the ground are respectively inserted into the connection holes of the ground side half of the side pipes, respectively, so that the ground side of each of the side pipes is on the ground side. Half on the slope,
Then, the construction method of the drainage structure of the slope ground, wherein the outer half of each side vein pipe is covered and joined to the ground side half.