JPS6026890B2 - slope stabilization device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for stabilizing slopes such as embankments and cutouts.

Various techniques have been explored to stabilize such slopes. In other words, what is shown in Figure 1 A, C, and C is an example of a construction method called the "Shigara construction method," in which concrete piles are installed at predetermined intervals in the slope direction and longitudinal direction of the slope. Drive a wax or wooden pile 1, etc., attach a net 5 or a sodder 6, etc. to the pile 1, support the earth pressure with the pile 1 and the net 5 (soda 6), and use the area where the table top collapses. I was trying to stop it. In addition, the water in the soil is allowed to pass through the net 5 (soda 6), etc., without being stopped at the shingles, thereby preventing water pressure from being applied to the shingles. This technology has a lot of experience in construction, and has the advantage of being low cost and easy to construct. However, on the other hand, the water pressure in the soil is applied to the foot of the slope, making it prone to collapse if there is heavy rainfall, and it is difficult to prevent landslides at each level. Therefore, pile 1 and net 5 (
Part of the soda 6) had to be made to protrude, which had the disadvantage of worsening the appearance and wasting material.

Figure 2 A shows an example of the casing technique known as the ``jacage cage method,'' in which chestnut stone, gravel 7, etc. are wrapped in wire mesh 8, etc.
In other words, it is a device that uses a cage and buries it on the slope, and uses the cage to prevent the topsoil from collapsing and remove water from the inside.This technology has been used since ancient times, similar to the Shigara construction method. However, since chestnut stone, gravel 7, etc. are heavy, construction is very time-consuming, and the time and effort required to use baskets is also troublesome.Furthermore, chestnut stone, gravel 7, etc. do not have adhesive strength and are heavy, so they cannot be used on slopes. It had the disadvantage of increasing the tonosho applied to X.

Additionally, Samurai Seki 47 General Publication No. 406 also discloses a technique using a filler such as 4. stone. In addition, Figures 1 and 2
In the figure, 3 is a U-shaped groove, and in Figure 2, 2 is a U-shaped groove.
is an effective pipe, and this effective pipe 2 is used as necessary.

Further, for example, Japanese Patent No. 1981-81306 discloses a method of constructing a frame using hollow tubes.

However, when hollow pipes are used, the drainage range is linear, and this technique cannot drain soil water over a wide planar area. Therefore, the purpose of the present invention is to quickly and reliably eliminate soil water over a wide area to prevent soil slippage, reduce soil shoals, reliably maintain soil shoals, and be easy to construct. Therefore, it is an object of the present invention to provide a stabilizing device for a slope that, once installed, exhibits its effect permanently.

According to the present invention, there is provided a drainage material in the form of a plastic plate having a water-permeable portion and a drainage portion, one surface forming the water-permeable portion and the other surface forming the water-impermeable portion; The permeable part of the material faces upstream of the slope, the drainage part is located downstream of the slope, and the longitudinal direction of the drainage material is substantially horizontal and the longitudinal direction is substantially vertical. This drainage material is installed in the middle of the ground, and the water inside the ground is removed by this drainage material.

Therefore, rainwater or gray water flowing down the slope is dammed by the plate-like body, flows into the permeable part of the plate-like body, flows downward along the impermeable part, and is drained from the drainage part.

In this case, the permeable portion prevents dirt and the like from entering the drainage material, allowing for suitable drainage. In addition, soil water on a slope can be drained in a planar manner by the height relative to the width of the drainage material, and since it is made of plastic, it is lightweight and easy to install, and the amount of dirt can be reduced. The drainage material used in the present invention is a rectangular elongated material as a whole, so the longitudinal direction means the direction in which the elongated material extends, and the linear direction means the width direction, that is, the rectangular direction. It means the direction of the green side.

Therefore, the plate-shaped drainage material is provided so that its width direction is substantially vertical, and its longitudinal direction extends substantially horizontally. In carrying out the present invention, the water-permeable portion is formed of a perforated plate, a nonwoven fabric, etc., and a porous embossed sheet or a corrugated sheet may be used, but the shape is not particularly limited.

Further, the water-impermeable portion may be a plate, a boss sheet, a sheet with corrugated sheet ribs, etc., and its shape is not limited. In carrying out the present invention, the water-permeable part is made up of a porous plastic material, a net, a non-woven fabric, etc., and the drainage part is made up of a space surrounded by the water-permeable part and the non-water-permeable part. In this specification, plastic means something substantially made of plastic, and includes, for example, synthetic paper made of material pulp and plastic pulp, and metal coated with plastic.

Next, a slope stabilizing device embodying the present invention will be described with reference to FIG. 3 and subsequent figures.

In Figures 3 to 5, pile 1 is placed on ground A,...
Type in.

For piles 1,..., concrete piles or plastic piles are used to ensure durability, and slope
If the length in the inclination direction is, for example, 5 skins, then two are driven at an interval of 1.5, and two at an interval of 1 in the longitudinal direction, that is, in the left-right direction in FIG. Then, the ground A near where the piles 1, ...... were driven is excavated B, and the perforated pipe,
For example, mesh pipes 2, .

Next, the two-layer plastic plate-like body is flattened with an embossed sheet 11 (a sheet on which a large number of cylindrical or truncated conical embosses 11a are protruded) provided with embossing 11a, as shown in FIG. 6A, for example. The flat sheet 12 has a large number of small holes 12a through which water passes, that is, a water-permeable portion, and the embossed sheet 11 constitutes a water-impermeable portion without small holes as shown in the figure.

Further, in the middle part formed by the two-layer plate bodies 11 and 12, a long sheet-like drainage material 4, .・・・
The flat sheet 12 on the side with... faces the upstream side of the slope Attach the bag to the pile 1, so that the direction is vertical.
In this case, as shown in FIG. Gravel D is applied to restrict the movement of the drainage material 4.

As shown in FIGS. 4 and 5A, the drainage material 4 and the silk pipe 2 are connected at the connecting portion 2b. That is, in FIG. 5A, the connecting portion 2b schematically shows the portion where the silk pipe 2 is inserted into the drainage material 4.

Therefore, rainwater flowing down along the slope can be seen in the permeable part 1.
It flows into the space 13 from 2a and flows downward. FIG.
7 is reinforced.

That is, a large number of holes 15a are provided on one surface of the so-called corrugated cardboard material. Then, the perforated plate 15 is placed on the upstream side, and is placed horizontally with the longitudinal direction perpendicular to the plane of the paper in FIG. 5C. At this time, water flowing down the slope enters the space 13 between the impermeable part 16 and the permeable part 15 from the upper hole 1, as shown by arrow A, and then flows out of the space 13 from the lower hole 15a. The water is drained and then guided downward while repeating the flow of inflow and outflow. However, for example, in the example of the embossed sheet (Fig. 6) A, the flowing water does not flow out to the outside, but instead passes between the embosses 11a and 11a adjacent in the longitudinal direction (perpendicular to the plane of the paper) and flows downward (to the right side of the drawing). flows to Finally, cover soil (embankment) C to a thickness of 20 to 30 cm on the ground A, and plant if necessary.

In addition, before adding drainage material 4 to pile 1, cover soil (embankment) C
However, the covering soil (embankment) C may be excavated B, 8 together with the ground A, and the drainage material 4 may be attached to the pile 1.

Figures 6 to 9 show drainage materials used in the embankment stabilizing device according to the present invention, and in these figures,
All drainage materials shall be placed with the top of the drawing facing upstream, the left and right sides of the drawing being vertical, and the direction perpendicular to the paper plane being horizontal.

Figure 6 shows a drainage material consisting of an embossed sheet 11 and a flat sheet 12.
a, the opening is a small hole 11b in the embossed sheet 11
, ... with small hole 11c, ..., C is small hole 12a
, . . . In place of the flat sheet 12, a fibrous filter, for example, a nonwoven fabric 14 is used, FIG. 7 shows a rib 21a.
,... is a drainage material consisting of a sheet 21 and a flat sheet 22. A is a drainage material consisting of a sheet 21 and a flat sheet 22, with a flat sheet 22 equipped with small holes 22a, . The one with small holes 22a, . . . small holes 21c, FIG. 8 shows the rib 3.
A drainage material (ribs 31a, . . . ) consisting of a sheet 31 with ribs 31a, .
... intersects with Toripu 32a, ...)
One sheet 32 is provided with four holes 32b, . . . . Fig. 9 shows a drainage material consisting of a corrugated sheet 41 and two flat sheets 42, 43;
small hole 3a. The opening is a corrugated sheet 41 with small holes 41a, ..., and the opening is a flat sheet 43 with small holes. 43
It is equipped with a,... In addition, Figures 6 to 9
In the figure, 13, 23, 33, 44 are spaces that can be drained,
In other words, it is the drainage part. The present invention is not limited to the example of the drainage material described above, and various other combinations and modifications can be implemented.

Further, the small pores may be formed mechanically or chemically by foaming. As explained above, according to the present invention, underground water can be quickly and reliably removed, soil support can be reliably supported, construction is easy, and once installed, the effect is exhibited semi-permanently. Therefore, it can be said that it is an extremely excellent slope stabilizing device.

In particular, in the present invention, since one side of the plate-shaped drainage material is a permeable part, rainwater flows in from here and does not flow on the slope at the other impermeable part, but between the permeable part and the impermeable part. The slope is stabilized as it flows downward through the .

Also, since underground water flows in through the permeable part, it can be drained in the same way.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional slope stabilization device. , Figure 2A is a cross-sectional view of the cage construction method, and the opening is a front view of A. Figures 3 to 5 show the slope stabilizing device according to the present invention, in which Figure 3 is a sectional view, Figure 4 is a front view, and Figure 5A shows the combination of a drainage agent and a silk pipe. The front view shows the connected state, and the mouth is a side view. Figures 6A, 6C, 7A, 8A and 9A, 9A and 9C are cross-sectional views of the drainage material used in the slope stabilization device according to the present invention, respectively. be. 1...
・Pile, 2... Perforated pipe, 3... U-shaped groove, 4...
Plastic drainage material, 5... Net, 6... Soda, 7. ．．・Chestnut stone, gravel, 8... wire mesh, 11... embossed sheet, 12, 22, 42, 43... flat sheet,
14... Fibrous filter, 21, 31, 32... Sheet with ribs, 41... Wavy sheet, 12a, 110,
11c, 21b, 21c, 22a, 31b, 31c, 3
2b, 41a, 42a, 43a...small hole, 13, 23
, 33, 44...drainage channel, A...ground, B, B'...
Excavation part, C...embankment, D...gravel. Figure 1 [a) Figure 1 (b) Figure 1 (',) Figure 2 (a) Figure 2 (mouth) Figure 3 Figure 4 Figure 5 (a) Figure 5 (b) Figure 5 H V Figure 6 Figure T Figure 8 Figure 9

Claims (1)

[Claims] 1. A plastic plate-like drainage material having a water-permeable part and a drainage part, one surface forming the water-permeable part and the other surface forming the impermeable part, and the water-permeable part of the drainage material The drainage material is oriented toward the upstream side of the slope, the drainage part is located on the downstream side of the slope, and the drainage material is placed in the soil of the slope so that its longitudinal direction is substantially horizontal and its longitudinal direction is substantially vertical. A slope stabilization device that is installed in a slope and is characterized by removing underground water using this drainage material.