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Rockfall prevention structure at tunnel entrance

A technology for tunnels and anti-fall, applied in the treatment of dangerous rock and rockfall at the entrance of highway tunnels and railway fields, can solve the problems of large amount of brushing and difficult handling, and achieve the effects of reducing damage, convenient construction and lowering cost.

Active Publication Date: 2017-03-08
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using Qingfang to process, the amount of brushing is huge, and it is difficult to deal with

Method used

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  • Rockfall prevention structure at tunnel entrance
  • Rockfall prevention structure at tunnel entrance
  • Rockfall prevention structure at tunnel entrance

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Experimental program
Comparison scheme
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] refer to figure 1 , figure 2 and image 3 , the tunnel entrance rockfall prevention structure of the present invention includes a tunnel entrance structure 12 and a rockfall occurrence area 21 located on the slope above it. A rockfall induction groove 11 is set on the slope between the tunnel portal structure 12 and the dangerous rockfall occurrence area 21. The rockfall induction groove 11 has an arc-shaped top section close to the dangerous rockfall occurrence area 21, and the original along the slope surface The arc-shaped left section and the arc-shaped right section that extend downward to the outside of the tunnel portal structure 12 and the line. The rockfall generated in the rockfall occurrence area 21 falls into the rockfall induction groove 11, and the rockfall induction groove 11 changes its trajectory so that it rolls down along t...

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Abstract

The invention discloses a rockfall prevention structure for a tunnel portal. The rockfall prevention structure for the tunnel portal aims to substantially reduce the amount of moving rocks at the tunnel portal, lower the construction cost of a rockfall prevention project and reduce the construction difficulty. The rockfall prevention structure for the tunnel portal comprises a tunnel portal structure and a rockfall happening area located on a slope face above the tunnel portal structure. A falling rock induction groove is formed in the portion, between the tunnel portal structure and the rockfall happening area, of the slope face. The falling rock induction groove is provided with an arc top segment, a left side segment and a right side segment, wherein the arc top segment is close to the rockfall happening area, and the left side segment and the right side segment extend downwards along the original slope face to the portions outside the tunnel portal structure and the line.

Description

technical field [0001] The invention relates to the entrance and exit of railway and highway tunnels, and is suitable for the treatment of dangerous rockfall at the entrance of railway and highway tunnels, which affects the structure and operation safety of the tunnel entrance due to the development of dangerous rockfall in the unloading fissure zone. Background technique [0002] Railways and highways in mountainous areas are limited by the terrain, and the lines often pass through the mountains and inevitably cross valleys and rivers in the mountains. Due to the limitation of the radius of the curve of the line, the line needs to cross mountains and mountains with tunnel engineering, and cross valleys and rivers with bridge engineering. Especially in the tunnel entrance with steep terrain and deep canyons, it often appears in the form of bridge-tunnel connection. [0003] Due to the limitation of the terrain and the construction site in the bridge-tunnel connection section...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/14
CPCE21D9/14
Inventor 熊祥雪琚国全赵万强马青谭永杰曹彧何昌国胖涛郑长青罗禄森刘佩斯刘凯刘金松袁竹陈朝辉吴林朱志远
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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