JPH04213619A - Stabilizing work for face of slope in banking - Google Patents

Abstract

PURPOSE:To stabilize a banking and increase the restraining effect of a face of slope of the banking by using a lattice frame and reinforcement members. CONSTITUTION:A banking structure is formed by placing a mesh like reinforcement member 12 on the surface of the banking layer 10, placing another banking layer 10 on the previous layer 10, and repeating these processes by turns. Over the entire surface of the slope is placed a precast lattice frame 14. The upper and lower lattice frames 14 are joined and retained by squeezing the ends of the reinforcement members 12 between the lattice frames 14. Because the slope surface is covered with the reinforcement members retained with the lattice frames in this way, the effect of retaining the slope surface is increased and deformation such as bulging of the slope surface is prevented.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a construction method that integrates reinforcing materials and soil to prevent deformation of slopes and contribute to stabilization.

0002

[Prior Art] During construction, embankments are laid flat layer by layer and thoroughly compacted so that the entire cross section has a uniform density, resulting in a stable structure, but the slope of the embankment is , is generally constructed on a gentle slope, constrained by the inherent strength characteristics of the embankment material used.

In order to prevent this type of defect, as shown in FIG.
A mesh reinforcing material 2 is laid on the surface of the constructed embankment layer 1, and then the exposed surface 2a of the reinforcing material 2 is folded back and laid on the slope of the constructed embankment layer 1, and this end 2b is placed on the slope of the constructed embankment layer 1. The most common method is to wrap it around the top surface. In this construction method, layer 1
The embankment structure is completed by repeating the work of laying the reinforcing material 2 and the construction work of the embankment layer 1 alternately.

According to this construction method, in theory, the load of the upper embankment layer 1 is supported by the reinforcing material 2, so the load on the lower embankment layer 1 or the ground surface side is applied uniformly, and the stability of the embankment structure is improved. Sex increases. Furthermore, the exposed surface 2a on the extension of the reinforcing material 2 covers the slope and provides great resistance to slipping, thereby preventing the slope from collapsing.

However, in this construction method, the slope surface is restrained by the exposed surface 2a of the reinforcing material 2, which causes the following practical problems.

[0006]

[Problem to be Solved by the Invention] In other words, in this construction method, as shown by the imaginary line in the figure, as soil water pressure is applied to each layer 1 after construction, a phenomenon occurs in which the slope begins to bulge with the reinforcement material 2 as a node. was. This phenomenon is thought to be caused by poor compaction or compaction of each embankment layer 1, or by the presence of water after construction, but in order to prevent this slope bulge phenomenon, the exposed surface 2a was expected to have a restraining effect on the slope.

However, since the reinforcing material 2 is made of a flexible material, the slope may swell during construction, or the material may stretch due to soil water pressure. The actual binding force was very small. In addition, when the slope surface is scoured in such a swollen state, the tension of the exposed surface 2a is lost, further reducing the restraint effect, and there is a fear that this may cause the slope collapse.

[0008] This invention solves the above-mentioned problems, and provides slope stabilization work for embankments that can improve the stability of embankments by using reinforcing materials and further increase the effect of restraining the slopes. The purpose is to provide law.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a work in which a mesh reinforcing material is laid on the surface of a previously constructed embankment layer, and another embankment layer is further constructed on top of the mesh reinforcement material. In a construction method in which an embankment structure is constructed by repeating the steps alternately, a lattice frame is laid on the slope of the embankment structure, and the edges of the reinforcing material exposed on the slope side are secured to each of the lattice frames. It is characterized by The mesh-like reinforcing material mentioned above is
A water-permeable material such as a non-woven fabric or a woven fabric having a mesh smaller than that of the reinforcing material can be provided above and below the reinforcing material.

0010

[Function] According to the above structure, the reinforcing material is laid in the embankment with its edges integrally locked to the lattice frame, thereby firmly restraining the slope.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, the embankment structure is constructed by laying a mesh reinforcing material 12 on the surface of an embankment layer 10 that has been constructed in advance,
It is formed by alternately repeating the work of constructing other embankment layers 10 on top of the embankment, and a precast lattice frame 14 is laid all over the slope. The reinforcing material 12 is a lattice-shaped reinforcing material made of various materials and is commonly called a geogrid.

[0012] The lattice frame 14 is a rectangular frame-shaped precast product made of metal, plastic molding, reinforced plastic molding, or concrete molding, and the length of one side is equal to the slope of the construction thickness of each embankment layer 10. The length corresponds to the length of the slope, and as shown in Figure 2, they are laid densely in all directions on the slope. At the upper edge of each lattice frame 14,
As shown in detail in , a plurality of bolts 16 are protruded in a line. Further, on the lower edge side, insertion holes 16a corresponding to the respective bolts 16 are opened.

[0013] The end edge of the reinforcing material 12 exposed on the slope is located on each bolt 16 that protrudes from the upper end of the lattice frame 14 laid at an arbitrary height position on the slope.

Therefore, after the lattice frame 14 is laid, the end edges are inserted into each bolt 16, and when the upper lattice frame 14 is further laid, the insertion holes 16a at the lower edge of the upper lattice frame 14 are inserted. By passing the bolt 16 through and fastening the nut 20 to the protruding end of the bolt 16 via the seat ring 18, the reinforcing member 12 is
The edge of the reinforcing material 1 is clamped and fixed between the upper and lower lattice frames 14.
2 are secured to the upper and lower ends of each lattice frame 14.

Furthermore, cushioning materials 22 made of cork, rubber, or other polymer materials are sandwiched above and below the clamped edges to prevent damage to the reinforcing material 12. Therefore, in this embodiment, each lattice frame 14
In addition to being locked to the edge of the reinforcing member 12, the lattice frames 14 are also connected to each other, so that the effect of restraining the slope is extremely high.

Although the explanation has been omitted, the lower edge of the lattice frame 14 located at the lowest part of the slope and the reinforcing member 14 protruding toward the ground surface can be fastened by other fastening means. . In addition, if necessary, a plate, a net, a non-woven fabric, etc. can be attached to the hollow part inside the lattice frame 14 to prevent soil from spilling out, and greening can be carried out. Further, above and below each reinforcing material 12, a water-permeable material such as nonwoven fabric or woven fabric with a mesh smaller than that of the reinforcing material 12 can be placed to strengthen integration with the embankment layer 10.

[0017]

[Effects of the Invention] As described above in detail with reference to the embodiments, the method for stabilizing slopes in embankments according to the present invention stabilizes the embankment by alternately laminating mesh reinforcing materials on the embankment layers. You can aim for sex. Furthermore, since the slope is covered by a lattice frame integrally joined to the edge of the reinforcing material, the effect of restraining the slope can be increased, and deformation such as bulges of the slope can be prevented. In addition, the finished shape of the slope becomes better in terms of appearance.

Furthermore, there is an advantage that cost reduction can be expected by designing the embankment structure taking the above-mentioned restraint effect into consideration.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing a slope stabilization method according to the present invention.

FIG. 2 is a partially cutaway front view of the lattice frame installed.

FIG. 3 is an enlarged sectional view taken along line AA in FIG. 1;

FIG. 4 is an enlarged view of part B in FIG. 1;

FIG. 5 is a cross-sectional explanatory diagram showing a conventional embankment construction method.

[Explanation of symbols]

10 Embankment layer 12 Reinforcement material 14 Lattice frame

Claims (2)

[Claims] [Claim 1] A construction method in which an embankment structure is constructed by alternately repeating the work of laying a mesh reinforcing material on the surface of a pre-constructed embankment layer and then constructing another embankment layer on top of it. A method for stabilizing a slope in an embankment, characterized by laying lattice frames on the slope of an embankment structure, and locking the edges of the reinforcing material exposed on the slope side to each of the lattice frames. 2. The embankment according to claim 1, wherein the mesh-like reinforcing material is provided above and below with a water-permeable material having a mesh smaller than that of the reinforcing material, such as a non-woven fabric or a woven fabric. Slope stabilization method.