JPH08338027A - Construction of slope of embankment - Google Patents

Abstract

PURPOSE: To sufficiently tighten earth and sand in the face of slope without excessively hardening the earth and sand of the surface of slope so that water infiltrating from the face of slope into an embankment can be uniformly supplied to the surface layer of the slope. CONSTITUTION: A surface layer part 12 is divided, in the vertical direction, into a plurality of surface layers 12' and a corrugated sheet 14 is embedded so as to be set at the bottom of each layer 12'. The sheet 14 is prepared by bending, for example, a plate material of synthetic resin into a corrugated shape so that the sheet can elastically expand and contract in the thickness direction thereof with respect to a load from above. Consequently a load at the time of compaction is absorbed by the corrugated sheets and elasticity is given to the surface layer part 12 to prevent earth and sand of the part 12 from becoming excessively hard and also infiltration water is uniformly supplied to the face of slope and hence the growth of vegetation 13 can be accelerated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embankment slope structure, and more particularly to an embankment slope structure provided on a surface layer portion of the embankment slope.

[0002]

2. Description of the Related Art Road embankments for constructing the ground on which roads are installed, river embankments, embankments for constructing residential land, etc.
It is a typical embankment structure formed by using excavated earth and sand, but such embankment structure does not cause collapse or landslide of the embankment when it is constructed as a main structure. As shown, the surrounding area is rubbed with a slope with a certain slope on the field board, and this slope is appropriately compacted with earthen soil and protected by vegetation if necessary. .

[0003]

However, according to the above-mentioned conventional method for protecting the slope, if the soil of the soil is compacted excessively and the hardness of the surface layer of the slope becomes excessively large, the vegetation can be grown. Since it hinders, sufficient compaction work cannot be performed, so that there is a problem that the soil in the surface layer tends to become soft due to rainfall or the like.

Further, the rainfall that has fallen on the slope penetrates into the embankment, but if the compaction condition on the slope is insufficient and there is a loose part, the infiltrated water flows from there. There was a problem that the water was intensively drained, a shallow landslide occurred, and the water supply from the inside of the embankment became uneven, and uneven growth of vegetation was likely to occur.

Therefore, the present invention has been made in view of the above-mentioned conventional problems. It is possible to sufficiently compact the earth and sand of the slope without excessively hardening the earth and sand of the surface layer portion, and from the slope. It is an object of the present invention to provide a slope structure of an embankment capable of uniformly supplying the permeated water that has permeated into the embankment to the sediment in the surface layer.

[0006]

The present invention has been made in order to achieve the above object, and the gist thereof is a slope surface structure provided on the surface layer portion of the slope of the embankment. It is characterized in that the corrugated sheet is divided in the height direction, and the corrugated sheet is disposed on the bottom portion of each of the divided layers in the embankment while the slanted grooves of the corrugated sheet are extended downward toward the slope. It is in the slope structure of the embankment.

Further, in the sloped surface structure of the present invention, the corrugated plate disposed on the bottom surface of each of the divided layers is composed of a plurality of corrugated plates, and the upper corrugated plate of the downstream corrugated plate has the corrugated plate of the upstream side corrugated plate. It is preferable that the lower end portions are connected and arranged in a roof tile shape while being overlapped with each other.

[0008]

According to the slope structure of the embankment of the present invention, the corrugated sheet disposed on the bottom surface portion of the surface layer portion of each of the divided layers is laid on the upper end surface of the lower embankment and the corrugated sheet is uneven. As a result of this, a gap or a loose part is created between this upper end surface and even if the embankment is piled up above this and the surface sand is sufficiently compacted, the impact during compaction work will be affected by the corrugated sheet. This elasticity absorbs the voids and also imparts elasticity to the embankment of the surface layer to prevent the surface layer of the embankment from becoming excessively hard during compaction.

[0009] Further, rainwater that has penetrated into each layer of the surface layer due to the rainfall that has fallen on the slope is blocked from penetrating downward by each corrugated sheet, and the soil around each corrugated sheet is compacted during compaction. Since it is loosened due to elastic vibration, it passes through the loosened portion and flows down along each corrugated plate to reach the slope, and is distributed and supplied to the earth and sand in each surface layer portion below this.

Further, the corrugated sheet disposed on the bottom surface of each of the divided layers is composed of a plurality of corrugated sheets, and the lower end portion of the upstream corrugated sheet is superposed on the upper end portion of the downstream corrugated sheet and the roof tile. By arranging in a concatenated manner, even when the region of the surface layer portion is provided in a wide area, it is possible to easily prevent the surface layer portion from becoming excessively hard by laying the corrugated sheet in a wide area while ensuring workability. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The embankment slope structure of this embodiment is, for example, provided on the slope 11 of the embankment structure 10 constructed as a road embankment as shown in FIG.
A region having a width of 1 to several meters along 1 is defined as the surface layer portion 12, and the surface layer portion 12 is formed by compacting the slope 11.
To prevent the earth and sand from rising too hard,
The rainwater that pours onto the slope 11 and permeates into the surface layer portion 12 is installed so as to be able to supply the vegetation 13 on the slope 11 approximately evenly.

That is, in the slope structure of this embodiment, the surface layer portion 12 is vertically divided into a plurality of pieces having a thickness of about 30 cm to 3 m, and the bottom surface portion of each layer 12 'of the divided surface layer portion 12 is corrugated. It is configured by laying and embedding the plates 14 respectively.

Here, the corrugated sheet 14 is formed by bending a corrugated sheet material made of, for example, synthetic resin or stainless steel, which is in the embankment 10 and is resistant to corrosion, and is placed on a flat surface. In this case, it has elasticity that expands and contracts in the thickness direction with respect to a load from above.

The corrugated plate 14 has a surface layer portion 12.
For each of the layers 12 ′ constituting the above, on the upper end surface of the lower layer 12 ′, which has become a flat surface after the spreading and rolling operation is completed,
After laying the corrugated groove of the corrugated sheet 14 while extending it so as to incline downward toward the slope, laying earth and sand of the next layer 12 ′ above this, and laying and leveling a step of performing rolling compaction work. By repeating this in sequence, each layer 12 'is embedded in the bottom surface portion.

In this embodiment, a corrugated board 14 having a width of about 1 m, which is suitable for transportation and construction, is formed by stacking the upper end portion of the downstream corrugated board 14 with the lower end portion of the upstream corrugated board 14. By arranging them in a contiguous manner, they are laid in the entire area of the surface layer portion 12. However, if the width of the surface layer portion 12 is not so large, the roof tile shape is not connected and a single unit is formed in the direction of inclination. It is also possible to lay it in the region of the surface layer portion 12 by using the corrugated plate 14 of FIG.

Further, in this embodiment, the corrugated sheets 14 laid in connection with the bottom surface portions of the respective layers 12 'are arranged so that at least the lower end portion of the corrugated sheet 14 provided in the upper layer 12' and the lower layer 1 are provided.
Since the upper end portion of the corrugated plate 14 provided in 2'is arranged so as to overlap in a plan view, most of the rainwater that falls on the slope 11 and permeates the surface layer portion 12 downward. The water can be drained to the slope 11 via the corrugated plate 14.

According to the slope surface structure of this embodiment installed as described above, the slope surface 11 is formed by spreading and leveling each layer 12 ', or by raising the earth and soil appropriately. As shown in FIG. 2, even when the sand and sand of the surface layer portion 12 is sufficiently compacted by
The concave portion on the lower surface of the corrugated sheet 14 holds a gap 15 or a loosened portion between the corrugated sheet 14 and the upper surface of the lower layer 12 ′, whereby the shock during the compaction work is absorbed by the elastic deformation of the corrugated sheet 14. Along with the surface layer of the embankment 12
The respective layers 12 'are also provided with elasticity to prevent the surface layer portion 12 from being excessively hardened by the compaction work.

Further, the rainfall pouring on the slope 11 penetrates the surface layer portion 12 downward to reach the corrugated sheet 14 laid on the bottom portion of each layer 12 ', and is generated by elastic vibration of the corrugated sheet 14 at the time of compaction. Through the loosened portion 16 on the upper surface of the corrugated plate 14
It will flow down toward the slope 11 along the inclination of the corrugated plate 14. Therefore, the rainwater that has poured on the slope 11 of each layer 12 'is distributed and supplied from the tip portion of the corrugated plate 14 to the vegetation 13 of the sloped slope 11 of the lower layer 12' substantially evenly. become.

That is, according to the slope surface structure of this embodiment, since the soil in the surface layer portion 12 has elasticity, the compacted soil does not become excessively hard, and therefore the slope is applied by spraying seeds, etc. The vegetation 13 such as grass and trees can be easily grown, and rainwater that permeates the surface layer 12 is quickly discharged to prevent weakening, and the vegetation 13 on the slope is almost evenly permeated. To promote even growth, the stable slope 11 of the embankment 10 whose surface is protected by the vegetation 13 can be easily obtained.

[0020]

As described above in detail, according to the slope surface structure of the embankment of the present invention, the surface layer portion of the slope is divided in the height direction, and the corrugated plate is provided on the bottom surface portion of each divided layer. Since the corrugated groove of the corrugated plate is disposed in the embankment while being inclined and extended downward toward the slope, the slope of the slope can be sufficiently compacted without excessively hardening the sediment of the surface layer. At the same time, the permeated water that has penetrated into the embankment from the slope can be uniformly supplied to the soil in the surface layer to facilitate the growth of vegetation and easily form a stable slope of the embankment.

[Brief description of drawings]

FIG. 1 is a cutaway sectional view showing the structure of a slope surface structure of an embankment according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing a laying condition in a surface layer portion of a corrugated plate.

[Explanation of symbols]

 10 Embankment 11 Slope 12 Surface layer 12 'Each layer obtained by dividing the surface layer 13 Vegetation 14 Corrugated sheet

Claims (2)

[Claims] 1. A slope surface structure provided on a surface layer portion of an embankment slope, wherein the surface layer portion is divided in a height direction,
A sloped surface structure of an embankment, characterized in that a corrugated plate is disposed on the bottom surface of each of the divided layers in the embankment while the concave and convex grooves of the corrugated plate are inclined and extended downward toward the slope. 2. A roof tile-shaped corrugated plate disposed on the bottom surface of each of the divided layers, in which a plurality of corrugated plates are superposed with an upper end portion of a downstream corrugated plate and a lower end portion of an upstream corrugated plate. The embankment slope structure according to claim 1, wherein the slope surface structure is formed by connecting and arranging the slopes.