JPS63217019A - Slope protection work - Google Patents

Abstract

PURPOSE:To raise the safety of construction work as well as to improve the appearance of plant by a method in which slope frames are set on slope, reinforcing bars for other vertical frame are set in parallel with the inclined direction of the slope, vertical frames are constructed and horizontal frames are formed, then soil is placed. CONSTITUTION:A net 3 is laid on the whole surface of a slope 2, slope frames 1 are set on the net 3, and the uppermost net 11 is set in the direction of crossing the inclined direction of the slope 2. Reinforcing bars 4 for vertical frame are set in parallel with the inclined direction of the slope 2 and cement mortar is sprayed to construct the vertical frame 5. Horizontal frames 6 crossing the frames 5 are constructed, and soil 7 is placed on the net 3. Operations can thus be made in safe environment without devastating the surface of slope.

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 a means of protecting slope surfaces.

In this method, the slope is expected to have the function of supporting the soil and the drainage treatment function 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 the soil from flowing out. This method aims to effectively prevent slope collapse.

In addition, various materials for the legal framework are used, including concrete, resin, and all-mesh material, and various shapes of the legal framework, such as a lattice shape and a circular shape, have been proposed.

Problems to be Solved by the Present Invention> The following problems exist in the conventional slope protection technology.

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

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

(c) Construction costs are high when using prefabricated concrete blocks for the construction of a rampart, due to the material costs and the labor involved in transporting and installing the concrete blocks.

(d) The method of constructing a concrete legal framework using formwork on the slope of the site requires a lot of time and effort to construct the legal framework.

OBJECTS OF THE INVENTION The present invention was made in view of the above points, and it is an object of the present invention to provide a slope protection construction method that improves construction safety and provides a good view of plants.

Configuration of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

Kui〉Dharma frame to use FIG. 1 shows an example of a 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 an expanded metal plate can be used as the net body 11.

[Connection Material] The connection material 12 is a member for connecting the plurality of mesh bodies 11 arranged facing each other, and can be a rod such as a steel rod or a string.

Annular hooks 13 are formed at both ends of this connecting member 12,
The foldable legal frame 1 is formed by loosely fitting the hooks 13 onto vertical lines or horizontal lines of the net body 11, respectively.

Note that the folding direction of the legal frame 1 is such that the connecting member 12 is
If the connecting member 12 is hung on the vertical line of the net body 11, it can be folded in the longitudinal direction of the net body 11 (horizontal folding type). There is a foldable type (vertical folding type), and whether to select the horizontal folding type or the vertical folding type is appropriately determined depending on the undulations of the slope 2.

Further, the number of mesh members 11 constituting the - group legal frame 1 may be two or more, but in consideration of preventing the legal frame 1 from falling over, it is preferably about 10 to 20 net members.

Entrance> Net laid on the slope In the present invention, the net 3 is laid over the entire surface of the slope 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.

Kuha〉Construction method (1) Laying the net (Fig. 2) A net 3 is laid over the entire surface of the slope 2 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 paving net 3, and furthermore, accidents from falling rocks can be prevented.

(3) Reinforcement arrangement method for vertical frame reinforcing bars Vertical frame reinforcing bars 4 are arranged between each net body 11 that constitutes the frame 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 the lattice frame (Fig. 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, each net body 11 near the vertical frame reinforcing bars 4
Both ends of each net body 11 are integrally fixed to the vertical frame 5 by spraying mortar or concrete on both ends thereof.

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 horizontal frame 6,
The net body 11 and the bed net 3 are exposed.

(5) Soil and vegetation (Figure 5) Add soil 7 mixed with seeds and fertilizers is brought in until the soil is completely absorbed.

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. 5, the grown plants are well entangled with the roots of the netting 3 laid on the slope 2, and the soil 7 is stabilized at an early stage.

Kuha〉A study on the deterrent effect of soil replacement A part of the weight of soil 7 carried onto slope 2 acts as a collapse force toward the downstream side.

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, so that collapse is reliably suppressed.

In particular, when comparing the deterrent effect of soil in a grid of the same size between the present invention and a conventional grid-shaped concrete framework,
The deterrent effect of the present invention is greater than that of the conventional method by the amount of the mesh body 11 located within the grid.

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. Since it is shared and supported, the deterrent effect of the land 7 is excellent.

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 described above, the following effects can be obtained.

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

(b) Even if you walk on the slope when transporting the slope frame or each of the 81 materials, the bedding net functions as a protective material for the slope, so the surface of the slope will not be 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 legal frame, the restraints can be easily removed from the bedding net, so it is possible to reliably prevent the legal frame from falling during construction.

(e) Replenishment soil is supported by vertical frames and horizontal frames that are rigid structures, and a group of nets that are flexible structures, and the movement of the soil is also regulated by the bedding nets. The deterrent effect will be 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 the drawing]

Figure 1: Perspective explanatory diagram of an embodiment of the slope protection method according to the present invention. Figure 2: Explanatory diagram of J net laying work. Figure 3: Explanatory diagram when the slope frame is developed. Figure 4: Construction of the horizontal frame. Explanatory diagram at the time Figure 5: Cross-sectional view of the slope when it is covered with vegetation Figure 3

Claims (1)

[Claims] 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. , 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 vertical frames are arranged between each mesh body parallel to the direction of slope slope, After constructing the vertical frame by spraying mortar or concrete on the reinforcing bars for the frame, and constructing the horizontal frame that intersects with the vertical frame by spraying mortar or concrete on every few nets in parallel with the construction of the vertical frame. , A slope protection method that involves adding soil to the slope between the vertical and horizontal frames.