Tunnel high and steep slope dangerous rock falling rock protection structure and constructing method

A technology for rockfall of dangerous rock and protection structure, which is applied in basic structure engineering, construction, excavation and other directions, can solve the problems of unfavorable promotion and difficult construction of rockfall protection of dangerous rock, and achieves the effect of being favorable for promotion, good protection effect, and favorable for popularization and application.

Pending Publication Date: 2020-06-05
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a rockfall protection structure and construction method for high and steep slopes of tunnels, which can effectively protect dangerous rock Rockfall, simple construction, economical and environmentally friendly, conducive to popularization and application

Method used

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  • Tunnel high and steep slope dangerous rock falling rock protection structure and constructing method
  • Tunnel high and steep slope dangerous rock falling rock protection structure and constructing method
  • Tunnel high and steep slope dangerous rock falling rock protection structure and constructing method

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Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides a protection structure for dangerous rockfall on the high and steep side slope of the tunnel, such as Figure 1-2 As shown, it includes a number of supporting columns 1, blocking force nets 2 and guiding nets 3; supporting columns 1 are arranged on the slope at the tunnel entrance to fix the blocking force nets 2 and guiding nets 3; the blocking force nets 2 Both sides are fixed on the support column 1, and the retaining force net 2 is in an inclined state relative to the horizontal, which is used to guide the falling rocks to slide to the outside of the tunnel opening; the bottom side of the retaining force net 2 is connected to the slope; The top side of the net 2 is fixedly connected with the top of the support column 1 and the retaining force net 2, so as to close the direction of one end where the tunnel opening is located.

[0038] The protective structure can guide dangerous rockfall to only one side of the tunnel opening. Specifically, ...

Embodiment 2

[0040] This embodiment also provides a protection structure for dangerous rockfall on the high and steep side slope of the tunnel, such as Figure 3-5 As shown, it includes a number of supporting columns 1, blocking force nets 2 and guiding nets 3; supporting columns 1 are arranged on the slope at the tunnel entrance to fix the blocking force nets 2 and guiding nets 3; the blocking force nets 2 Both sides are fixed on the support column 1, and the retaining force net 2 is in an inclined state relative to the horizontal, which is used to guide the falling rocks to slide to the outside of the tunnel opening; the bottom side of the retaining force net 2 is connected to the slope; The top side of the net 2 is fixedly connected with the top of the support column 1 and the retaining force net 2, so as to close the direction of one end where the tunnel opening is located.

[0041] Specifically, such as image 3 , the support column 1 is provided with three columns, vertically standi...

Embodiment 3

[0045] Based on the rockfall protection structure for high and steep slopes of tunnels described in Embodiment 1 or Embodiment 2, this embodiment provides its construction method, including the following steps:

[0046] S1. In the stable area of ​​the high and steep slope, locate the construction position of the support column 1, and then excavate the foundation pit of the support column 1 or construct the grouting anchor to form the structure of the support column 1; reserve the connecting steel ring on the support column 1;

[0047] S2. Install the blocking force net 2 between the support columns 1, and bind and fix the blocking force network 2 and the connecting steel ring on the support column 1;

[0048] S3. Construct a fixed anchor rod 4 on the slope body to fix the retaining force net 2;

[0049] S4. Install the guide net 3 in blocks or as a whole from top to bottom. The guide net 3 is fixedly connected to the top of the support column 1 and the retaining force net 2, a...

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Abstract

The invention relates to the field of geotechnical engineering, in particular to a tunnel high and steep slope dangerous rock falling rock protection structure and a constructing method. The protection structure comprises a plurality of supporting columns, blocking stress nets and guide nets. The supporting columns are arranged on a slope of a tunnel hole and used for fixing the blocking stress nets and the guide nets. The two sides of the blocking stress nets are fixed to the supporting columns. The blocking stress nets are at a horizontal inclined state and used for guiding falling rock to slide to the outside of the tunnel hole. The bottom sides of the blocking stress nets are connected with the slope. The guide nets cover the top sides of the blocking stress nets and are fixedly connected with the top ends of the blocking stress nets to close the direction of the end with the tunnel hole. The slope surface of the steep slope is divided by the supporting columns, the blocking stressnets and the guide nets into a plurality of protection regions of a block-shaped structure, the dangerous rock falling rock in each region only acts on the portion, located in the region, of the protection structure after falling, the impact of the dangerous rock falling rock on the supporting columns and the blocking stress net is divided, and the protection structure is good in protection effect, safe and reliable.

Description

technical field [0001] The invention relates to geotechnical engineering, in particular to a dangerous rockfall protection structure and construction method for high and steep slopes of tunnels. Background technique [0002] High and steep slopes are widely distributed in mountainous roads, and it is difficult for rocks and rocks to fall into the tunnel entrance, which has a great impact on road operation safety. For high and steep slopes, dangerous rockfalls have great destructive power. After the outer layer of dangerous rockfalls falls, new dangerous rockfalls will continue to develop inward. It is very difficult to protect against dangerous rockfalls, and it is difficult to clean up later. When protecting dangerous rocks and falling rocks, the method of fully reinforcing high and steep slopes is often used. The reinforcement range is large, the engineering volume is high, the difficulty is high, and the input cost is high, which is not conducive to popularization. Cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20
CPCE02D17/20E02D17/202Y02A10/23
Inventor 姚裕春邹兴普程云张耀房立凤高继涛
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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