JPH046818B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a slope protection method.

<Prior Art> Recently, various methods have been proposed to more reliably prevent slope collapse by using a combination of slope construction and vegetation construction as slope protection means.

In this method, the slope is expected to have the function of supporting soil and the drainage treatment of running water on the slope surface, and the plants grown on the slope are expected to have the function of stabilizing the soil and preventing runoff of the soil. This method aims to effectively prevent slope collapse.

Furthermore, various materials are used for the legal frame, such as concrete, resin, and wire mesh, and various shapes of the legal frame, such as a lattice shape and a circular shape, have been proposed.

<Problems to be Solved by the Present Invention>> Conventional slope protection techniques have the following problems.

(b) When workers walk on the slope, there is a risk that clods of earth or stones may fall on the slope, which poses a problem in terms of work safety.

(b) Even if soil is applied to the slope and vegetation grows, it takes a long time for the soil to stabilize because there is no material for the roots of the plants.

(c) When constructing a slope using ready-made concrete blocks, the construction cost is high because of the material costs and the labor involved in transporting and installing the concrete blocks.

(d) In the case of constructing a concrete legal framework using formwork on the slope of the site, it takes a lot of time and effort to construct the legal framework.

<Object of the present invention> The present invention was made in view of the above points, and an object of the present invention is to provide a slope protection construction method that improves construction safety and provides a good view of plants.

<Structure of the present invention> An embodiment of the present invention will be described below with reference to the drawings.

<A> Legal frame used FIG. 1 shows an example of the legal frame 1 used in the present invention.

This legal frame 1 is a foldable legal frame that includes a belt-shaped net body 11 and a connecting member 12 that connects the plurality of net bodies 11.

[Mesh body] The net body 11 is a belt-shaped wire mesh formed by knitting wire rods vertically and horizontally.

In addition, a resin plate or a steel plate with a large number of holes, or expanded metal may be used as the net body 11.

[Connection material] The connection material 12 includes a plurality of net bodies 1 arranged facing each other.
This is a member for connecting two parts, and a rod such as a steel rod or a string can be used.

Annular hooks 13 are provided at both ends of this connecting member 12.
, and each hook 13 is connected to a mesh body 11.
A foldable legal frame 1 is formed by loosely fitting the vertical line or horizontal line of the frame 1.

Note that the folding direction of the legal frame 1 is the same as that of the connecting member 12.
When hung on the vertical line of the net 11, the net 11
There are two methods: one that can be folded in the longitudinal direction (horizontal folding type) and one that can be folded in a direction that goes over the net 11 when the connecting member 12 is hooked to the horizontal line of the net 11 (vertical folding type). Whether to select the horizontal folding type or the vertical folding type is determined as appropriate depending on the undulations of the slope 2.

Further, the number of mesh bodies 11 constituting one set of legal frames 1 may be two or more, but in consideration of preventing the legal frames 1 from falling over, it is preferable that the number is about 10 to 20.

<B> Paving net laid on the slope surface In the present invention, the paving net 3 is laid over the entire surface of the slope surface 2 during construction.

This net 3 is made of a flexible net, and for example, known nets made of metal, resin, fiber, etc. can be used.

<C> Construction method (1) Laying the net (Figure 2) Lay the net 3 over the entire surface of the slope 2 that is to be protected.

The upper part or part of the net 3 is fixed to the slope 2 using anchors.

(2) Installation of the slope (Fig. 3) Next, the folded slope 1 is transported upstream of the slope 2 and laid out on the bedding net 3.

At this time, each net 11 is arranged in a direction perpendicular to the direction of inclination of the slope 2.

The uppermost net 11 is fixed to the slope 2 using anchors.

Even if a worker walks on the slope when transporting the slope frame 1 and various materials, the surface of the slope will not be damaged by the netting 3, and furthermore, accidents from falling rocks can be prevented.

(3) Reinforcement arrangement of vertical frame reinforcing bars Vertical frame reinforcing bars 4 are arranged between each net body 11 that constitutes the slope 1 in parallel to the inclination direction of the slope 2.

Anchors are used to fix the intersection of the vertical frame reinforcing bars 4 and the mesh body 11 or the middle of the vertical frame reinforcing bars.

(4) Construction of lattice frame (Figure 1) Next, mortar or concrete is sprayed onto the reinforcing bars 4 for the vertical frame to construct the vertical frame 5.

When constructing the vertical frame 5, mortar or concrete is also sprayed on both ends of each net body 11 near the reinforcing bars 4 for the vertical frame, and both ends of each net body 11 are integrally fixed to the vertical frame 5.

At the same time, mortar or concrete is sprayed on every few net members 11 to construct horizontal frames 6 that intersect with the vertical frames 5. (Figure 4) In this way, mortar or concrete is sprayed onto the slope 2 to construct a lattice frame.

Inside the lattice frame formed by the vertical frame 5 and the horizontal frame 6, the net body 11 and the floor net 3 are exposed.

(5) Soil and vegetation (Fig. 5) Net 11 is placed on the bedding net 3 exposed within each lattice frame.
Add soil 7 mixed with seeds and fertilizers is brought in until the soil is covered.

The above steps are repeated to advance the slope work and vegetation work towards the downstream side of the slope 2.

As shown in FIG.
Hakoto 7 will be stabilized quickly.

<C> Examination of deterrent effect of soil replacement A part of the weight of soil reinforcement 7 carried onto slope 2 acts as a collapse force toward the downstream side.

Since the collapse force of the soil 7 is supported by the vertical frame 5 and the horizontal frame 6 made of mortar or concrete and the group of nets 11 connected to the horizontal frame 6, collapse is reliably suppressed.

In particular, when comparing the deterrent effect of the present invention and the conventional concrete lattice-shaped slope frame, it is found that the present invention is more effective than the conventional method in deterring soil by the net 11 located in the lattice. The effect will be greater.

Also, when comparing the deterrent effect of the soil 7 in the present invention and the conventional mesh-made legal frame, the weight of the soil 7 in the vertical frame 5 and the horizontal frame 6 is lower in the present invention than in the conventional one. Because it is shared and supported, it is a different land 7
has an excellent deterrent effect.

From the above, in the present invention, even if the span of the horizontal frame 6 is increased, it is possible to reliably prevent the top soil 7 from collapsing.

<Effects of the Present Invention> Since the present invention is as explained above, the following effects can be obtained.

(b) The netting laid on the slope and the net slope frame provide good root support for plants and improve the stability of the soil.

(b) Even when walking on the slope while transporting the slope frame and various materials, the bedding net functions as a protective material for the slope, so the surface of the slope is not damaged.

(c) Even if clods of earth or stones on the slope try to fall, the net prevents them from falling, so work can be done in a safe environment.

(d) When installing the slope frame, the restraints can be easily removed from the bedding net, so it is possible to reliably prevent the slope frame from falling during construction.

(e) The soil is supported by the vertical and horizontal frames, which are rigid structures, and a group of nets, which are flexible structures, and the movement of the soil is also regulated by the netting. Therefore, the deterrent effect of soil is significantly improved.

(F) As a reinforcing material for the horizontal frame, only the mesh was used without using reinforcing bars.

This choice of use was made in consideration of the tendency for mortar or concrete to sag on sloped surfaces.

Therefore, construction can be carried out without exposing the net, which is a reinforcing material for the horizontal frame, from the mortar or concrete.

[Brief explanation of drawings]

Figure 1: An explanatory perspective view of one embodiment of the slope protection method according to the present invention, Figure 2: An explanatory diagram of the work of laying a bedding net, Figure 3: An explanatory diagram of the unfolding of the slope frame, Figure 4 : Explanatory diagram when constructing the horizontal frame, Figure 5: Cross-sectional diagram of the slope when it is covered with vegetation.

Claims (1)

[Scope of Claims] 1. A flexible bedding net is laid over the entire area of the slope to be protected, and a foldable slope frame formed by connecting a plurality of nets with connecting materials is deployed on the slope. and the slope frame is arranged in a direction perpendicular to the direction in which the slope of each mesh body slopes, separate reinforcing bars for the vertical frame are arranged between each mesh body in parallel to the direction of inclination of the slope surface, and the above-mentioned Vertical frames were constructed by spraying mortar or concrete on the reinforcing bars for the vertical frames, and in parallel with the construction of the vertical frames, mortar or concrete was sprayed on every few nets to construct horizontal frames that intersect with the vertical frames. Afterwards, this is a slope protection method in which soil is added to the slope between the vertical and horizontal frames.