JPH11229391A - Method for reinforcing grooved slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To economically construct on the surface layer of a slope a structure which does not project to the surface of the ground at all to keep the natural environment and view. SOLUTION: Grooves 1, 1 are drilled in a slope while crossing one another lengthwise and crosswise. A broad tension member 2 woven in the form of a strip and made of a synthetic resin or the like is placed in the groove 1. A permeating hardener 3 is injected toward subsoil to permeate the subsoil. A hardener 4 of high viscosity is injected into the groove 1 to construct a structure 5 where the tension member 2 is integrated with natural ground by the hardeners 3, 4. Therefore, the structure 5 extends lengthwise and crosswise over the natural ground and functions to prevent the collapse of a surface layer, so that even if a part of the natural ground collapses, it is supported by the peripheral structure 5 to prevent collapse. Since no structural parts project onto the surface of the ground, the structure serves to conserve the natural environment and view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground reinforcement method for stabilizing a slope, and more particularly to a grooving slope reinforcement method utilizing a ground itself as a ground reinforcement structure connected to the slope. It is.

[0002]

2. Description of the Related Art Various methods have been developed for stabilizing slopes. Hardening material spraying method that sprays hardening material on slopes, block stacking method of stacking blocks on slopes, construction method of constructing building materials on slopes, casting hardening material and building structures that intersect in a vertical and horizontal grid pattern is there. These conventional methods try to receive the earth and sand load of the ground by a block or a built structure placed on a slope.

[0003]

That is, according to these conventional methods, blocks and structures inevitably protrude or appear on the ground. The appearance of blocks and structures on the slopes would inevitably impair the natural landscape. In many cases, it is necessary to cut the flowers and trees on the slope to perform the construction, and sometimes the growth of the vegetation is hindered after the construction, which may impair the natural environment.

Further, the conventional construction method is intended to receive the earth and sand load of the ground by a block or a structure, and the ground itself is not expected at all as a structure for stabilizing a slope. In other words, the size of the blocks and structures was increased in order to counteract the earth and sand load of the ground only with the blocks and structures, and the construction was large and the construction cost was high.

[0005]

According to the present invention, there is provided a groove cutting slope reinforcing method in which a tensile material is provided in a groove cut into a ground on a slope, and the tensile material is connected to the ground by a hardening material injected into the ground. The problem is solved by integrating the structure into a reinforcing structure that does not appear at all on the ground, and by receiving the sediment load of the ground by the structure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, a reinforcement structure is constructed in which no structure is exposed on the slope surface.
Excavate a trench in the ground. The width of the groove is about several mm to several cm, and the depth is about several cm to several tens cm. The trench is to be excavated multiple times and cut so as to cross the slope vertically and horizontally. In the vertical and horizontal directions, a vertical groove and a horizontal groove may be cut in a lattice shape, or a diagonal groove inclined to the right and a diagonal groove inclined left may be cut in an oblique lattice shape. Even if they are not always equidistant and parallel, they may be irregularly spaced apart or not parallel, such as when excavating around trees. In this way, even if grooves are cut vertically and horizontally according to the situation at the site and cross each other, the original function is not impaired at all.

In these grooves, a tensile member is provided as a reinforcing member. As the tensile material, various members can be considered as long as the member can receive the earth and sand load of the ground as a tensile force, such as a PC steel strand, a deformed reinforcing bar, a synthetic resin-based tensile material, and a polymer-based tensile material. Materials can be adopted. These members are cord-shaped members, but are more preferable because other wide band-shaped members can receive the load of the ground more reliably. In other words, a member made of a synthetic resin or a polymer-based material, or a band-shaped tensile material obtained by widening a stainless steel material can be considered. It is also favorable and has an advantage in drainage, and is more preferable. In the case of a strip-shaped tensile member, it is disposed in the groove so as to stand up in the width direction. In other words, they are arranged in such a manner that the strip-shaped tensile member stands in the groove. The arrangement of the tension members one by one is not limited.
A plurality of strip-shaped tensile members may be provided in one groove, or a plurality of different tensile members such as a combination of a strip-shaped tensile member and a PC steel strand may be provided.

[0008] From these grooves, a permeable hardening material is injected toward the surrounding ground on the slope. Permeability is a material that easily penetrates into voids in the ground, and various materials such as a resin-based hardening material such as low-viscosity cement milk and epoxy resin can be used. Thereafter, the groove is filled with a highly viscous hardening material to cover the tensile material. As the hardening material having high viscosity, mortar having low slump, concrete, and other resin-based hardening materials can be widely used. As a result, the ground around the groove hardened by the hardening material is integrated with the hardening material and the tensile material in the groove. Such a structure is constructed in a state of crossing the ground vertically and horizontally. If necessary, anchors may be struck from the ditch to the ground to integrate the ground with the ground. Anchors such as steel rods, rock bolt type anchors, and ground anchors that pass a plurality of tensile members through the sheath, insert into the drilled hole in the ground, and fix with the grout material can also be used. . It is preferable to place the anchor near the place where the tensile members intersect.

[0009] These structures extend vertically and horizontally at the ground and intersect, and are connected by a tensile member. In other words, the structures that cross vertically and horizontally function in the same way as the conventional lattice-like structure, and hold down the load on the ground. Since no structures protrude from the surface of the earth, the natural landscape and environment are not damaged. In addition, it is only necessary to cut the groove and dispose the tensile material and to cast the hardening material, and the construction is extremely easy as compared with the related art.

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Figures 1 to 3 show the slope on the ground,
This is an embodiment in which a vertical groove 1 and a horizontal groove 1 are excavated and formed in a lattice shape. A tensile member 2 as a reinforcing member is provided in each groove 1.1. As the tensile member 2, a wide band-like tensile member 2 in which fibers of a synthetic resin material are knitted in a net shape is used.
The width of the belt-shaped tensile member 2 is about several tens cm. The intersecting portions are arranged in the grooves 1.1 by sewing or welding in advance the belt-shaped tensile members 2 arranged vertically and horizontally.

A permeable hardening material 3 is injected from the groove 1 toward the ground. Cement milk is used as the permeable hardening material 3. After the permeable hardening material 3 permeates into the ground, the groove 1 is filled with a highly viscous hardening material 4. As the highly viscous hardening material 4, mortar having a low slump is used. As the hardening materials 3 and 4 harden, the ground around the groove 1, the hardening material 4 and the tensile material 2 in the groove 1 are integrated. In this way, the structure 5 extending in a lattice pattern near the ground surface is constructed. The grid-like structure 5 extending on the slope is continuously connected like a net as a whole. When a part of the ground collapses and a sediment load acts, the surrounding structure 5 becomes like a net. Support this,
Prevent collapse as a whole. Even when the anchor is not used, when the center of the slope is about to collapse, the structures 5 built on the left and right slopes support this and prevent the collapse.

FIG. 4 shows an example in which a groove 1 inclined to the right and a groove 1 inclined to the left are excavated on a slope by a plurality of lines, and the grooves 1.1 are excavated so as to intersect in an oblique lattice pattern. A tensile material 2 is also provided in these grooves 1, a permeable hardening material 3 is penetrated around the grooves 1, and a highly viscous hardening material 4 is filled in the grooves 2 to form a structure 5. In the embodiment shown in FIG. 4, an anchor 6 is provided at the intersection of the grooves 1.1. The crossed structures 5
It is supported from below by this anchor 6, and the collapse of the ground is prevented more effectively.

[0013]

The present invention has the above-described configuration, and can obtain the following effects. Grooves are cut vertically and horizontally on the slope, and a tensile material that is a reinforcing material is placed in the groove to form a structure in which a part of the ground is integrated vertically and horizontally by hardening material, so that this structure is like a net It has a function to prevent the surface layer from collapsing as a continuous structure vertically and horizontally. As a result, when a part of the slope tries to collapse, the other part also receives the sediment load and prevents the collapse. A groove is cut on the slope, and a tensioning material is placed in the groove to inject and fill the hardening material into the ground and the groove.Therefore, no structure appears on the surface of the ground, and the growth of plants is inhibited. This method has little effect and is effective for environmental protection. Since it is only necessary to cut a narrow groove, it can be installed on the slope without touching as much as possible, so the cutting of trees and the like can be reduced as much as possible. Since no structures protrude above the ground surface, natural slopes can be preserved and the landscape of the slopes is excellent. In other words,
The labor of planting etc. is significantly reduced. A permeable hardening material is injected into the ground of the ground, and a part of the ground is integrated with the tensile material and used as a structure, which enables economical construction and energy saving. Useful for saving resources. By arranging a belt-like tensile material in the groove and using it as a reinforcing material for the ground, it is possible to transmit the load of the ground to the ground widely, and at the same time, when the reinforcing material is made into a belt,
Because of its wide width, it can be easily settled on the ground.

[Brief description of the drawings]

FIG. 1 is a front view of a structure constructed on a slope according to the present invention.

FIG. 2 is a sectional view of a groove.

FIG. 3 is a sectional view of a slope of the embodiment of FIG. 1;

FIG. 4 is a front view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Groove 2 Tensile material (strip-shaped reinforcement material) 3 Hardening material 4 Hardening material 5 Structure 6 Anchor

Claims (2)

[Claims] 1. Excavating a plurality of grooves vertically and horizontally on a slope, arranging a tensile material in each groove, injecting a permeable hardening agent from the grooves toward the ground, Filling the groove with a viscous hardener and covering the tensile agent, filling the groove, and constructing a reinforcing structure in which the tensile material is integrated with the ground by the hardener to prevent the slope from collapsing Grooving slope reinforcement method. 2. The method for reinforcing a grooved slope according to claim 1, wherein a strip-shaped tensile material is used as the tensile material, and is disposed in the groove so as to stand up in the width direction.