JPS6337208B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a slope stabilization method using a large container.

[Conventional technology]

Conventionally, methods are often used to protect slopes by combining concrete slope frames or by spraying mortar on site to form slope frames, adding soil inside the frames, and planting vegetation. Landing on high slopes is quite hard work and is often disliked. For this purpose, the soil is put into sandbags together with fertilizer, compost, water retaining materials, etc., or in some cases, seeds for vegetation are attached to the surface of the sandbags in advance and the sandbags are piled inside the legal frame to add soil. There are many methods used to do this.

[Problem that the invention seeks to solve]

The purpose of this invention is to eliminate the double work of forming a legal framework and then adding soil in the conventional technology.

[Means to solve problems]

In order to solve this problem, in the present invention, a large container whose periphery is at least partially reinforced with a rigid material is filled with soil, and this large container is laid on a slope.

[Effect]

With this structure, soil filling work is easy, and construction using mechanical power is efficient and inexpensive.
The reinforced rigid material acts as a legal framework and prevents soil from flowing out.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an example of a container 2 used in the present invention. It is a box-shaped container with an open top surface, and a bottom surface 5.
is made of a strong, flexible, water-permeable material that prevents soil from spilling, and the peripheral edge 6 is constructed by overlapping a water-permeable sheet 4 on a rigid wire mesh 11 to prevent soil from spilling.

It is convenient to form rings 12 for fishing hooks and anchor pins in two places at the top and bottom of the four corners of this container 2. Further, reinforcing materials, partition plates, etc. may be placed inside the container. When using this sub-soil on a steep slope, the surface may be protected with a net or the like to prevent the sub-soil from falling off. The container itself has strength, flexibility,
Of course, it is also possible to use a bag made of the same water-permeable material, with a portion of its periphery reinforced with a rigid material.

As long as this container has sufficient water permeability at least on the bottom surface, the periphery does not necessarily have to be water permeable; for example, the periphery may be formed of a thin band-like plate made of ferrocement. This periphery may be ribbed to increase rigidity.

In this example, the rigid material is used for reinforcement.
It does not have to cover the entire periphery; for example, only two adjacent peripheries may be used.

Before laying the container on the slope, fill the container constructed in this way with soil 8 on the road etc.
shall be.

The size of this sub-soil is not particularly stipulated, but usually the length of each side is 0.5 to 1.5 m and the height is
It is 10~30cm, and the weight when filled with soil is 100~
1000Kg is common, and it is difficult to handle by input.

It is desirable that the soil to be filled be suitable for vegetation. Grass growth requires 50% sand, 35% silt, and clay.
It is said that soil with a content of 15% or less is good, so it is desirable to adjust and fill with such soil as appropriate, but it is often difficult to obtain the most suitable material due to the location.
Mix and adjust soil amendments, fertilizers, etc. as appropriate.
Bentonite and slaked lime are commonly used as soil amendments, and as fertilizers, in addition to fast-acting compound fertilizers, there is slow-release fertilizer made by Mitsubishi Chemical Corporation, which is formed into large particles of isobutylidene diurea. It is desirable to mix in. In addition, it is desirable to mix peat moss, bark compost, vermiyukilite, and water retaining materials such as foamed resin made of open cells.

When constructing this kind of soil, heavy equipment such as a truck, crane, or power shovel is used to lift it, move it, and lay it.

The laying method is not to install it in a separately formed slope frame, but to form the frame itself that prevents the soil from flowing out with a rigid periphery at the same time as the soil. A certain edge is placed on the valley side of the slope, and the soil is laid at a nearly right angle so as to support the soil from below. After laying the anchor pin, attach it to the ring 1 at the four corners.
It is preferable to secure the base by pounding it in place 2. In this way, the construction is completed by stacking up the extra soil one after another vertically and horizontally, covering the entire slope with the extra soil. When the peripheral edges of two adjacent sides are reinforced with a rigid material, they can be stacked such that the unreinforced peripheral edge is joined to the rigid peripheral edge.

Instead of the additional soil, a soil/vegetation board 15 as shown in FIG. 2 may be used. In this way, it is convenient to form the seed fertilizer mixed layer 13 on the surface layer of the customer soil in advance because there is no need to sow seeds later. The seed fertilizer mixed layer uses seeds and fertilizer as essential materials, and various mixed materials are added thereto. As the mixed material, fibers, soil, bentonite, peat moss, vermiyukilite, and adhesive are used as appropriate.

Furthermore, it is preferable to provide an erosion prevention coating layer 14 against rain and the like on the seed fertilizer mixed layer. Other means may be used to protect the seed fertilizer mixture from erosion by rain. That is, it is better to cover the seed fertilizer mixed layer with a relatively fine-mesh net. This restraining net is made of, for example, a 300-denier monofilament of polyethylene, the mesh is 10 mm square, and the entire surface is entangled with cotton-like material.

The type of seeds for the seed fertilizer mixed layer may be selected as appropriate depending on the location conditions of the slope and the construction period.

Furthermore, it is convenient to use a granular or solid compound fertilizer containing nitrogen, phosphoric acid, and potassium. The amount of fertilizer is preferably around 50g per ^square meter.

〔effect〕

Since the present invention is configured as described above, it exhibits the following effects.

(1) Even without constructing a separate slope frame, the stability of the soil is maintained by the rigid periphery laid around the container.
Construction is easy because the surrounding area can be constructed at the same time as the additional soil.

(2) Since the container is made of permeable material, spring water and rainfall on the slope will be drained downward.
Water will not accumulate in the container and will not harm the plants.

(3) Since the bottom surface is made of a flexible material, it can adapt to slight irregularities on the slope.

(4) By using large containers, it is possible to reduce the number of customer soils, and since processing is performed using heavy machinery, it is possible to rationalize materials and save labor in construction, reducing overall construction costs. .

(5) Since the soil is filled in advance, work such as mixing the soil is easy, and more suitable soil can be used.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the additional soil, and Figure 2 is a side sectional view of the vegetation and additional soil. 1: Customer soil, 2: Container, 4: Water permeable sheet,
6: Periphery, 8: Soil, 11: Wire mesh, 12: Ring, 1
3: Seed fertilizer mixed layer, 14: Erosion prevention layer, 15: Addition soil/vegetation board.

Claims (1)

[Claims] 1. Filling a large container made of a strong, flexible, and water-permeable material with at least a portion of its periphery made of a rigid material, and then laying it on a slope. Slope stabilization method.