JPS6311706A - Shock refaxing structure with butyl rubber mat for rock jet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention of this application relates to a butyl-based rubber mat impact mitigation structure for mitigating the impact when a rock falls on a beam end.

Conventionally, impact-reducing structures have used sand padding on the top of rock sheds as a sand cushion, but in order to improve the impact S-reduction effect, it became necessary to use a large amount of sand. As a result, in the event of a rockfall, the bedding may be torn off, and the rockshed members beneath the bedding may be directly damaged by a large impact, so as a countermeasure, it is necessary to make the cross-section of the rockshed members extremely large. I needed to do it. Therefore, the invention of this application aims to eliminate the above-mentioned drawbacks.

Next, a specific configuration for achieving the above purpose will be explained with reference to the drawings. The upper surface of the leg of the rock shed body supports an appropriate position near one end of the rockfall protection fence, and the other end of the rockfall protection fence is supported on the cliff. A butyl-based rubber mat is placed on the top of the front protection fence, supported directly or indirectly through a concrete wall member, at an appropriate position on a wall-like part that is relatively close to a vertical wall, such as a part of a slope or a part of a slope. A butyl-based rubber mat for Rokusei Tsud, in which anti-slip materials are arranged at appropriate intervals from the bottom to the top of the butyl-based rubber mat, a net is laid on top of the butyl-based rubber mat, and sand is laid on top of the net. Tsukimachi! It is a relaxation structure.

In addition, install an end stop at the lower end of the top surface of the rockfall protection fence on the leg of the rock shed body, and set the end stop on the bottom edge of the rockfall protection fence on the leg of the rock shed body. It is preferable to maintain the structure of the impact mitigation structure by supporting the end faces of the mitigation mat, net and bedding portion. Next, to describe the effects resulting from the above structure, a butyl rubber mat is laid on the top of the rockfall protection fence, and sand is laid on top of the rubber mat, so the impact from falling rocks etc. is absorbed by the two layers of sand and rubber mat. In addition to the netting, the net interposed between the rubber mat and the bedding sand further alleviates the impact, and also prevents the rubber mat located at the top of the protective fence from moving, especially preventing it from falling off. This has the effect of preventing the sand that has been placed from moving. Further, by arranging the butyl rubber mat below the sand layer, there is an effect that the amount of sand for shock absorption can be reduced. In particular, butyl-based rubber mats have a strong impact temperature reduction effect, so they have a great cushioning effect as a cushioning material. Therefore, although it is relatively cheap, it is extremely expensive.
It provides a shock absorbing structure with a large sum effect and has a hanging effect.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a rockfall protection fence according to the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the main part of FIG. 1. 1. Completion protective fence body 2, butyl rubber mat 3, net 4, sand 5, end stop 6, anti-slip material

Claims (1)

[Claims] A butyl rubber mat is laid on top of Rockshed's rockfall protection fence, and a net is laid on top of the rubber mat.
Shock mitigation structure with butyl-based rubber mat for rock sheds with sand laid on top of the net.