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Tunnel collapse handling method for convergent collapse cavity

A treatment method and technology for tunnels, which are applied in tunnels, tunnel linings, ventilation of mines/tunnels, etc., can solve the problems that the treatment method has no operability, safety hazards, uneconomical problems, etc., achieve a wide range of practical value, speed up construction progress, The effect of saving project investment

Active Publication Date: 2020-01-07
POWERCHINA CHENGDU ENG
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Problems solved by technology

[0012] The invention provides a tunnel collapse treatment method of convergent cavity collapse, which solves the problems that the existing treatment methods are not operable, have potential safety hazards, and are uneconomical

Method used

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  • Tunnel collapse handling method for convergent collapse cavity
  • Tunnel collapse handling method for convergent collapse cavity

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with accompanying drawing.

[0050] refer to figure 1 and 2 , a convergent landslide occurs in the tunnel at 8 places on the tunnel face. The present invention includes a tunnel collapse treatment method for a convergent cavity. After the tunnel cavity 1 is stabilized, the following steps are implemented:

[0051] S1. Utilize the slag to form a construction operation platform 2

[0052] After the collapse cavity 1 of the tunnel converges (no more collapses and falling blocks), the existing slag is used to form a construction operation platform. Use the excavator to level the slag collapse, and back-pressure the side walls on both sides of the tunnel and the bottom of the tunnel face 8. The slag collapse often has a large particle size, and the fine stone cave slag can be backfilled on the upper part of the construction work platform 2 from the outside of the tunnel. The purpose of caulking and levelin...

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Abstract

The invention discloses a tunnel collapse handling method for a convergent collapse cavity, and relates to the field of tunnel engineering. By the adoption of the tunnel collapse handling method for the convergent collapse cavity, the problem that an existing handling method lacks operability, can cause potential safety hazards, and is not economical is solved. According to the technical scheme, the tunnel collapse handling method for the convergent collapse cavity comprises the steps that first, after the tunnel collapse cavity is stabilized, a construction platform is formed by means of collapse residues; second, a landslide-affected section is divided into an excavated landslide-affected section and a non-excavated landslide-affected section which are separately reinforced; third, concrete is sprayed to support the collapse cavity; fourth, a temporary support and a formwork are constructed on a landslide section, a manhole is formed in the portion, in the middle of the landslide section, of a tunnel vault, the collapse cavity is backfilled with concrete, landslide anchoring rods are constructed, reinforcement of the temporary support and the landslide-affected section is removed, and the construction platform is removed through excavation; and finally, a tunnel drain pipe and a waterproof plate are constructed according to original design, and secondary lining concrete is constructed. The tunnel collapse handling method has high practical value in handling convergent tunnel collapse cavities.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a tunnel collapse treatment method for convergent cavity collapse. Background technique [0002] A new tunnel is built under the geological conditions of hard rock (granite, limestone, etc.). fall. After the tunnel collapses to a certain extent, the collapse cavity will be stable, and this type of tunnel collapse cavity is called convergent cavity collapse. [0003] There are no specific technical requirements and treatment methods for tunnel collapse in the current code. The existing method for dealing with similar landslides is: after the tunnel collapses, remove the slag, then carry out anchoring and spraying support for the collapsed cavity, and then pre-bury the concrete pumping pipe, and pump concrete to fill the collapsed cavity. There are following disadvantages in the above-mentioned processing method: [0004] (1) The method of landslide treatment after removing th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/15E21D11/18E21D11/28E21D11/10E21D11/04E21D20/00E21D20/02E21F1/18E21F16/02E21D9/12
CPCE21D9/122E21D11/006E21D11/04E21D11/10E21D11/105E21D11/152E21D11/18E21D11/28E21D20/00E21D20/021E21F1/18E21F16/02
Inventor 吴学智王建黄鹏顾峰张少辉
Owner POWERCHINA CHENGDU ENG
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