JPH04330116A - Method for repairing old slope protector - Google Patents

Abstract

PURPOSE:To simplify repair works, save labor, shorten the time of executing works, and accomplish economical repair works. CONSTITUTION:In the repair method for an old slope protecting body which was executed for the purpose of stabilizing the inclined surface of a natural ground, holes are bored from the surface of the oil slope protecting body toward natural ground so as to reach cavities 11 existing at the boundary between the old slope protecting body and the natural ground. The cavities are filled with a filler 3 from these through holes 21, and a new slope protecting work is applied from over the old slope protecting body.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing old slope protection bodies constructed for the purpose of stabilizing mountain slopes during construction work for expressways, dams, etc.

0002

2. Description of the Related Art One of the methods for stabilizing a mountain slope is to spray or paint the slope with mortar and then cover the slope with a protector to protect it. In the case of spraying or painting work, the mortar protection covering the slope may crack over time due to various weathering processes, or may partially peel off and fall. The risk level increases every year. In particular, in the case of spraying or painting work, the weathering phenomenon is often accelerated due to the voids that exist between the old protective body and the ground. That is,
Rainwater and groundwater infiltrate the voids, causing repeated freezing and frost heaving, which accelerates the weathering of the old protective structure. Therefore, it is necessary to repair the old protection body every few years. The conventional repair method is performed through the following steps. ■First of all,
Make cuts in the old protective body and cut wire mesh, reinforcing bars, etc. ■
Next, remove the mortar from the old protective body and discard it. ■Cut the exposed ground and level the ground. ■Construct new slope protection.

0003

[Problem to be solved by the invention] The above-mentioned prior art includes:
The following problems exist. <B> Since the chiseling work for the old protection body is carried out on the slope,
The reality is that it is difficult to use large machines, and the work relies on manual labor. Therefore, performing chisel work requires a lot of effort and time, and is very uneconomical. <B> Since the collected mortar is industrial waste, disposal is costly and uneconomical.

0004

[Means for Solving the Problems] The present invention has been made to solve the above-mentioned problems, and it simplifies repair work, saves labor and shortens construction time, and is economical. The purpose of this study is to provide a method for repairing old slope protection structures that enables efficient repair work. That is, the present invention provides a method for repairing an old slope protector constructed for the purpose of stabilizing a ground slope, in which a hole is drilled from the surface of the old slope protector toward the ground, and the old slope protector and the ground are repaired. After passing through the hole to the gap between the hole and filling the filler into the gap from this through hole,
This is a method of repairing old slope protection, which is characterized by applying new slope protection over the old slope protection.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <A> Confirmation of void position Figure 1 shows a state in which an old slope protection body 2 to be repaired has been constructed on the slope of a mountain 1. This old slope protection body 2 was constructed by a mortar sprayer or painter. In the repair work, first, the position of the gap 11 interposed between the old slope protection body 2 and the ground mass 1 is confirmed. The confirmation method is preferably carried out using a known ultrasonic sensor or the like. Another possible method is to tap the surface of the old slope protector 2 and search for changes in sound. In addition, the position of the void 11 can be confirmed by various methods.

<B> After confirming the position of the drilling gap 11, a hole is drilled from the surface of the old slope protector 2 toward the ground 1 side, and the injection hole 21 is penetrated to the gap 11. The holes are drilled by a known method using a hammer drill or the like.

<C> Filling with filler Next, the gap 11 is filled with the filler 3 through the injection hole 21 . At this time, the filling material 3 is also filled into the injection hole 21 . The filling material 3 can be efficiently filled by filling large voids 11 with mortar such as cement milk and filling small voids 11 with a resin system such as epoxy. In this way, by filling the void 11 with the filler 3, it is possible to prevent rainwater and groundwater from entering the void 11, prevent weathering of the old slope protection body 2, and prevent the old slope protection The adhesion between the body 2 and the ground 1 can be strengthened.

<D> New slope protection work After the void 11 has been improved as described above, as shown in FIG. 2, mortar spraying, painting, or Various slope protection works such as slope works and greening works 4
will be newly constructed using a known method.

[0009]

[Effects of the Present Invention] Since the present invention is as explained above, the following effects can be obtained. <B> Since there is no need to chisel out the old slope protection, repair work can be simplified. Therefore, it is not necessary to spend a lot of labor and time on chisel work as in the past, and repair work can be carried out efficiently and economically. <B> Since the voids between the old slope protection body and the ground are filled with filler, it is possible to prevent rainwater and groundwater from entering the voids, thereby suppressing weathering of the old slope protection body. At the same time, it is possible to strengthen the adhesion between the old slope protection body and the ground.

[Brief explanation of drawings]

[Figure 1] Explanatory diagram of the work of drilling holes in the old protection body and filling them with filler material

[Figure 2] Explanatory diagram of the new slope protection work constructed over the old protection structure

Claims (1)

[Claims] [Claim 1] In a method for repairing an old slope protector constructed for the purpose of stabilizing a ground slope, holes are drilled from the surface of the old slope protector toward the ground, and the old slope protector and the ground are separated. The method of this method is to penetrate the gap between the two holes, fill the gap with filler material from the through hole, and then apply new slope protection work over the old slope protection structure. Repair method.