JPH026887B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slope protection method. According to the present invention, protection of steeply sloping slopes, bank protection, etc. can be easily achieved.

Conventionally, large-scale and relatively simple slope protection methods, such as the block construction method, connected block construction method, and slope block construction method, have been used to protect gently sloping slopes and protect banks.

However, in areas near cities or in rural areas, there are many steep slopes with slopes of about 3 to 5 minutes because land is difficult to obtain or is small, so the large-scale and simple slope protection method described above is not suitable. Not applicable. Conventionally, to protect such steep slopes, a construction method has been used in which materials such as split stones, interstitial stones, blocks, etc. are piled up on the surface. However, because the site has many small turns and curved sections, it is difficult to increase the size of split stones, Kanchi stones, blocks, etc., plan mechanized construction, and improve workability.
It was necessary to obtain pieces of talc, etc., each about cm in size, and pile them up one by one, making the work extremely difficult.

In addition, in order to maintain a retaining wall made of split stones after stacking without losing its shape over a long period of time, it is necessary to pour mortar or concrete between each split stone or block on site to unify the whole. In addition, in this case, it is also necessary to drain the soil water behind the retaining wall, so drainage works such as backfilling with chestnut stone and laying drainage pipes on the slope surface are also required. From this point of view, the workability was extremely poor.

The present invention aims to solve these conventional problems.

In the present invention, a large number of concrete blocks are fixedly arranged in a row along the edge of one side of a fiber sheet having water permeability and flexibility, and a large margin is provided on the side opposite to the side where the concrete blocks are arranged. A plurality of stacked block mats are stacked horizontally from bottom to top, with the side where the rows of concrete blocks are placed facing the front side of the slope, and the stacked concrete blocks of each mat form a retaining wall for the slope. This is a slope protection method that is characterized by layering.

The invention will be explained in more detail with reference to the drawings.

FIG. 1 is a side view showing an example of a block stack used in the present invention. The concrete block 1 and the rectangular fiber sheet 2 are connected by adhesive or uncured mortar or cement paste, or alternatively, the fiber sheet 2 is brought into contact with the uncured concrete during the molding of the concrete block 1.
After infiltrating into uncured concrete, or after embedding a part or the whole of the contacting fiber sheet 2 in uncured concrete, by curing the concrete, many parts of the concrete block 1 are formed along the edge of one side of the fiber sheet 2. A fixed row is provided in one row.

There is a space between the edge of one side of the fiber sheet 2 and the concrete block 1 in the block stack.
It is preferable to arrange the concrete blocks 1 in a row without providing any blank space. Further, it is preferable to provide a margin between the concrete blocks 1. This is because the stacked block mats are lightweight and inexpensive, and when stacked block mats are laid one on top of the other, they help drain underground water behind the retaining wall, and they are easy to install and adapt to curved slopes.

It is preferable that the concrete block 1 has a planar shape with a maximum dimension part 4 on the edge side of the fiber sheet 2, and that this maximum dimension part 4 is a raised part 3 that is raised upward (see FIGS. 1B and 1). (See Figure A). This allows the lower stacked blocks to reliably support the upper stacked blocks, draining soil water behind the retaining wall and preventing soil from flowing out between the stacked blocks stacked above and below. In addition, when the slope is a curved surface, it can be rotated slightly in the vertical direction around the raised part 3, and relatively slightly rotated laterally around the maximum dimension part 4 as the center of rotation. This is to facilitate good adaptation to the surface shape.

The length of the fiber sheet 2 in the lateral direction (direction perpendicular to the side on which the concrete blocks 1 are arranged) is increased, and a large margin is provided on the side opposite to the side on which the concrete blocks 1 are arranged (first ~See Figure 6).
For example, the length should be longer than the thickness of a normal backfilling stone layer or the embedding depth of a drainage pipe. This is because the presence of soil on the margin ensures that the mutual position of the stacked blocks is stable, and the permeable fiber sheet 2 ensures that the soil water in the soil deep behind the retaining wall is absorbed. This is because water can be drained outward from the retaining wall. The lateral length of the blank space is preferably about 10 to 500% of the lateral length of the concrete block 1.

As shown in Figs. 2 to 6, the slope protection method of the present invention is a method in which a plurality of stacked block mats are stacked with the side where each row of concrete blocks is placed facing the front side of the slope. It is also possible to lay them one after another from bottom to top so as to form a surface retaining wall, and to pour uncured concrete or mortar 5 between each stacked block mat and block 1 and harden it to integrate the whole. Alternatively, if conditions such as soil quality or slope slope are good, it is possible to easily protect the surface of a steeply sloping slope by filling the back of the retaining wall with earth and sand 5.

Since a large number of concrete blocks 1 are fixed to a fiber sheet 2 in one row, the fiber sheets 2 are held at both ends with fastening devices such as clamps, lifted by a machine such as a crane, and stacked one by one on the slope surface. If this happens, a large number of stacked blocks will be laid quickly.

When the slope is curved in the horizontal direction and the center of curvature of the curved surface is inside the slope, that is, when the slope is convex outward, the shape of the concrete block 1 is
If the concrete blocks 1 are configured as shown in Figure B and Figure 1A, the concrete blocks 1 will not collide with each other.
A firm slope retaining wall can be formed by laying the inner fiber sheets 2 slightly overlapping each other (see FIG. 1C).

If the slope is curved in the horizontal direction and the center of curvature of the curved surface is on the outside of the slope, that is, if the slope is concave toward the outside, the concrete blocks 1 will not collide with each other, so As long as the radius of curvature of the surface is large, the fiber sheet 2 stretches relatively easily due to the inherent stretchability of the fiber sheet 2, so the inner edge of the fiber sheet 2 is laid with the inner edge slightly stretched to match the curvature. . When the radius of curvature of the slope is small, the fiber sheet 2 can be laid by partially cutting the inner end of the fiber sheet 2 (see FIG. 1D).

By increasing the lateral length of the fiber sheet 2 and embedding it in the soil on a slope, the fiber sheet 2 is restrained by the frictional force with the soil. Therefore, the concrete block 1 fixed to the fiber sheet 2
will not detach from the surface of the retaining wall. Therefore, pouring concrete or the like between the blocks, which is done in conventional stacking blocks, is not necessarily necessary and can be omitted.

The fiber sheet 2 has the ability to drain soil water to the slope because the space inside the fiber sheet 2 is not completely filled with concrete, mortar, or earth and sand 5 poured during construction. Therefore, it is not necessary to backfill with chestnut stone or install a drainage pipe on the surface of the retaining wall, which is carried out in the ordinary block construction method. However, if the influence of water such as spring water on the slope is large,
Of course, it is possible to use conventional safety measures such as backfilling with chestnut stone and installing drainage pipes.

Figure 3 shows an example in which the surface of the block 1 has the same slope as the slope in order to make the retaining wall on the slope smooth. This is an example of construction in which one surface is parallel to the slope surface.

FIG. 5 shows an example in which the fiber sheet 2 is extended long inside the slope. In this way, the effect of the fiber sheet 2 in stabilizing the slope surface and reinforcing the retaining wall by the frictional force between the fiber sheet 2 and the soil increases, so that the same effect as the conventional reinforced earth construction method can be obtained.
Therefore, even when embanking is performed using soft soil, it is possible to protect the surface of a steeply sloped and high embankment in a sufficiently stable and firm manner.

FIG. 6 shows an example in which a cavity 9 is bored in a part of a concrete block 1, soil is added, and vegetation is planted.

The front shape of the concrete block 1 is usually a square, but it is not limited to just a square, but in order to give the blocks an aesthetic appearance after being laid over each other.
Within the scope of the present invention, the shape may be a polygon larger than a triangle or any other arbitrary shape. In the case of a triangular shape, it is preferable to stack the triangular concrete blocks 1 in a shark's tooth shape, and appropriately bond the upper fiber sheet 2 to the fiber sheet 2 of the next block stack.

Regarding the shape of the concrete block 1, which is a so-called retaining part embedded inside the retaining wall surface, only the surface fixed to the fiber sheet 2 is flat, but the other surfaces may be configured as desired within the scope of the present invention. For example, by providing an upper protrusion 6 shown in dotted lines in FIG. 1A or a side protrusion 7 shown in dotted lines in FIG.
It is possible to prevent detachment from the molecule.

Thus, according to the present invention, it is possible to obtain a slope protection method that protects a narrow, steeply sloped slope simply, quickly, and extremely firmly.

[Brief explanation of drawings]

FIG. 1A is a side view diagrammatically showing an example of the building block mat used in the present invention, FIG. 1B is a plan view diagrammatically showing another example of the building block mat used in the present invention, and FIG. Figures C and 1D are a diagrammatic perspective view and a plan view showing the state of the stacked blocks when the present invention is applied to a curved slope, respectively, and Figures 2 to 6 are respectively the figures according to the present invention. FIG. 2 is a diagrammatic cross-sectional view showing a slope protection method. DESCRIPTION OF SYMBOLS 1...Concrete block, 2...Fiber sheet, 3...Protuberance of concrete block 1, 4
...Maximum dimension part of concrete block 1, 5...
...Filling material, 6, 7... Convex portion of concrete block 1, 9... Hollow portion of concrete block 1.

Claims (1)

[Claims] 1 A stack consisting of a large number of concrete blocks fixedly arranged in a row along the edge of one side of a fiber sheet having water permeability and flexibility, with a large margin provided on the side opposite to the side where the concrete blocks are arranged. A plurality of block mats are laid one on top of the other in the horizontal direction from bottom to top, with the side where the concrete blocks are arranged facing the front side of the slope, and the pile of concrete blocks of each mat forms a retaining wall for the slope. A slope protection method featuring: