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Collapse cavity compact filling method

A technology of cavity collapse and filling, which is applied in earth-moving drilling, shaft equipment, wellbore lining, etc., can solve problems such as initial support deformation, and achieve the effect of solving additional deformation of tunnels

Active Publication Date: 2018-11-20
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new method for densely filling the collapsed cavity behind the lining after the tunnel collapses, aiming at the problem that the existing compact filling method of the collapsed cavity often causes the primary support to continue to deform

Method used

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0067] This embodiment discloses a compact filling method for a collapsed cavity, such as figure 1 shown, including the following steps:

[0068] Ⅰ. Measure the geometric dimensions of the collapsed cavity space;

[0069] Ⅱ. Calculate the single maximum grouting volume and grouting depth based on the geometric dimension data of the collapse cavity;

[0070] Ⅲ. Determine the length of the monitoring pipe and the grouting pipe based on the single maximum grouting volume and grouting depth;

[0071] Ⅳ. Embedding monitoring pipes and laying out monitoring points;

[0072] Ⅴ. Adhesive grouting;

[...

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Abstract

The invention discloses a collapse cavity compact filling method which comprises the following steps: I, measuring the geometry size of a collapse cavity space; II, calculating the single maximal grouting amount and grouting depth; III, determining lengths of a monitoring pipe and a grouting pipe; IV, embedding the monitoring pipe and arranging monitoring points; V, performing close contact grouting; VI, performing grouting with surrounding rock reinforcement; VII, performing intermediate stage grouting; VIII, supplementation grouting; and IX performing real-time monitoring. The collapse cavity compact filling method aims at providing a novel collapse cavity compact filling method behind lining after tunnel collapse aiming to the usually caused problem of continuous deformation of primarysupport in the existing collapse cavity compact filling method. The filling method utilizes the monitoring pipe to perform real-time monitoring to deformation of primary support, and stops grouting when a primary support standard prewarning value is reached.

Description

technical field [0001] The invention belongs to the technical field of underground cavern engineering construction. Specifically, it relates to a method for compactly filling collapsed cavities in engineering construction of underground caverns. Background technique [0002] Due to the complex surrounding rock conditions of underground cavern engineering, there are many unknown unfavorable geological factors; therefore, the excavation support scheme obtained by using various calculation models and comprehensive engineering experience cannot completely avoid the collapse during the excavation process of the cavern. Once a landslide occurs, it will inevitably cause heavy losses and have a significant negative impact on the construction safety, construction period and investment of the project. After a landslide in an adverse geological environment (fragmented zone, fault, etc.), the surrounding rock collapses and holes appear in the initial support, often forming a collapsed ...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 赵伟杨小东何文俊
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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