JPH0320349Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slope reinforcement structure in which the slope is covered with a synthetic resin net.

[Conventional technology]

2. Description of the Related Art Reinforcing structures for slopes, which cover the slopes with synthetic resin nets to prevent collapse of the slopes and outflow of earth and sand, have been well known. Further, as shown in Fig. 4, a greening agent M made of a mixture of plant seeds, fertilizer, mud hardening agent, etc. is sprayed onto the slope B, and plants are grown on the slope B, thereby greening the slope B. When such greening measures are taken, which is often done, the net A that covers the slope B also serves to retain the uncured greening agent.

[Problem that the invention attempts to solve]

However, the synthetic resin net A used in the conventional slope reinforcement structure has warp 1 and weft 2 that form a lattice-like mesh, as shown in Figure 5.
The cross-sectional shape of each is configured to be flat,
When the greening agent M is covered over the slope B as shown in FIG. 4, the greening agent M sprayed onto the slope B tends to run off easily, so there is a problem that only a small amount of the greening agent is retained.

The present invention solves these problems by making it possible to effectively dam up the greening agent sprayed onto the slope by the weft threads of the net, thereby increasing the amount of greening agent held by the net. With the goal.

[Means for solving problems]

In order to solve the above problems, the slope reinforcement structure of the present invention has a lattice-like mesh formed on the slope by warp threads extending in the direction of inclination of the slope surface and weft threads crossing the warp threads. A net made of synthetic resin with The main point is that

[Effect]

According to the slope reinforcement structure with the above configuration, the slope is reinforced by being covered with a synthetic resin net, so collapse of the slope and outflow of earth and sand are prevented in the same way as in the conventional case. .

In addition, the weft threads dam up and prevent the greening agent from flowing down immediately after being sprayed on the slope, or from flowing down due to rainfall after being sprayed.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

Figure 1 shows a net A for covering a slope. This net A has a large number of lattice-like meshes formed by warp yarns 1 and weft yarns 2 that run perpendicular to the warp yarns 1. The warp yarns 1 have a flat cross-sectional shape, and the weft yarns 2 The net A has a thickness H such that the upper edges of the weft threads 2 protrude above the surface of a layer of greening agent (described later) sprayed onto the slope surface on which the net A is laid. Such a net A can be formed by continuous injection molding using polyethylene resin or polyvinyl chloride resin as a raw material. Here, it is sufficient that the specific dimension of the thickness H of the weft thread 2 is about 10 mm or more. That is, the above-mentioned greening agent is usually sprayed to a layer thickness of 10 mm or less, and it is sufficient to spray the greening agent to such a layer thickness for greening the slope. On the other hand,
Increasing the above thickness H without limit would be a waste of material and lead to a rise in prices, so the upper limit is set at 30 mm.
It is desirable to keep it to a moderate level. Further, it is desirable that the thickness t of the weft yarn 2 is set to such an extent that the mesh of the net A is not deformed too much due to the deformation of the weft yarn 2. Specifically, the thickness t may be approximately 0.5 to 1 mm. Further, the size of the lattice constituting the mesh may be approximately 2 cm square to 10 cm square.
If the size of the lattice is smaller than 2 cm square, the effect of reinforcing the slope will not be sufficiently exerted, and even if the greening agent enters the mesh, there will be a problem that plant seeds will be difficult to take root on the slope. On the other hand, the size of the grid is 10cm
When the size is larger, the shape of the mesh becomes easily deformed. In addition, the thickness H and wall thickness t of the weft thread 2 mentioned above,
Also, the size of the grid is just an example, and these dimensions should be appropriately changed depending on the soil quality of the slope and the ingredients of the greening agent.

FIG. 3 shows a state in which a net A of a constant width is laid down by hanging down from the top of a slope B. In this case, the warp yarns 1 of the net A are made to extend in the direction of inclination of the slope B. By doing this, when the above-mentioned greening agent is sprayed onto the slope B, the greening agent will be dammed up by the weft 2, so that the washing away of the greening agent will be suppressed, and each mesh of the net A will have enough A large amount of greening agent is retained. Even when it rains after the greening agent has been sprayed, the flow of the greening agent is dammed by the weft 2. Therefore, plants grow lively on the slope B over time. When laying the net A on a slope, work efficiency is improved if the roll-shaped net A of a certain width (for example, about 50 cm) is rolled out from the top of the slope B downward. Further, it is desirable that the ends of the adjacent nets A and A are overlapped with each other.

In the net A explained in Fig. 1, the weft thread 2 has a thickness of about 10 mm, and the warp thread 1 has a flat cross-sectional shape similar to the warp thread of a conventional net. The thickness is about the same as the weft thread 2, i.e.
The thickness may be such that it protrudes from the slope.

[Effect of idea]

According to the reinforcing structure of the present invention, by simply carrying out the extremely simple task of laying a net on a slope, the slope is reinforced by the net, and at the same time, the weft of the net strengthens the slope. The loss of the greening agent sprayed on the area is minimized. Therefore, the slope reinforcement structure of the present invention has great practical value not only in preventing slope collapse and soil outflow, but also in promoting greening of the slope.

[Brief explanation of drawings]

Fig. 1 is a partial perspective view showing a net used in the reinforcing structure of the present invention, Fig. 2 is a partial perspective view showing a modification of the above net, and Fig. 3 is a partial perspective view showing a state in which a slope is covered with the net. Figures 4 and 4 are cross-sectional views for explaining the state in which a greening agent is sprayed onto a slope covered with netting, and FIG. 5 is a partial perspective view showing the netting used in a conventional reinforcing structure. 1... Warp, 2... Weft, A... Net, B...
...Slope surface, H... Thickness of weft thread, M... Greening agent.

Claims (1)

[Scope of utility model registration request] A synthetic resin net having a lattice-like mesh formed by warp threads extending in the slope direction of the slope and weft threads crossing the warp threads is laid on the slope, and the upper edge of the weft thread of the net is projected onto the surface of a layer of greening agent made of a mixture of plant seeds, fertilizer, mud, hardening agent, etc. that is sprayed onto the slope.