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Reducing self-adaptive expansion grouting device and reinforcing method for cracking and breaking position of tunnel second liner

A grouting device and self-adaptive technology, which is applied in the direction of tunnel lining, tunnel, shaft equipment, etc., can solve the problems of high safety risk and aggravation, and achieve the effect of improving the overall strength and stability and improving permeability

Active Publication Date: 2020-02-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the tunnel structure is damaged, the damage is exacerbated by human disturbance and the safety risk is higher

Method used

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  • Reducing self-adaptive expansion grouting device and reinforcing method for cracking and breaking position of tunnel second liner
  • Reducing self-adaptive expansion grouting device and reinforcing method for cracking and breaking position of tunnel second liner
  • Reducing self-adaptive expansion grouting device and reinforcing method for cracking and breaking position of tunnel second liner

Examples

Experimental program
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Embodiment

[0051] The NSB tunnel in the Wuji section of the Daguang Expressway in Jiangxi Province is a split tunnel with a total length of 924m (964m on the right) and a maximum buried depth of about 110m. The clear height of the tunnel building boundary is 10.75m, the clear width is 5.0m, and the section is a three-center circular curved wall lining. During the operation period, the tunnel experienced long-term seepage and weathering by groundwater, and the surrounding rock, primary support and secondary lining were seriously damaged progressively. After the successful acceptance of the tunnel in 2008, it experienced five major disasters in 2008, 2010, 2012, 2014 and 2015. Disasters such as cracking of the second lining, water gushing, mud outbursts, collapse pits on the top of the mountain, and seepage from inverted arch uplifts followed one after another. After many times of treatment, the disaster cannot be fundamentally prevented from happening. The multiple occurrences of disaste...

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PUM

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Abstract

The invention discloses a reducing self-adaptive expansion grouting device and a reinforcing method for the cracking and breaking position of a tunnel second liner. The device comprises a body and a damper. The damper is arranged on the end portion of the body. The body is overall of a tubular structure, and the body is sequentially provided with a grout outflow section, a first expansion section,a second expansion section and a grouting section in the direction away from the damper. Multiple grout outlets are evenly distributed in the grout outflow section. The diameter after expansion of the first expansion section is larger than that of the second expansion section. By means of the grouting device, compaction grouting and splitting grouting can be simultaneously achieved, and by meansof compaction and splitting filling, the overall strength and the safety of reinforced surrounding rocks are improved.

Description

technical field [0001] The invention belongs to the technical field of operation tunnel renovation, and specifically relates to a different-diameter self-adaptive expansion grouting device and a reinforcement method for the cracked and damaged part of the second lining of the operation tunnel. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In recent years, with frequent abnormal climate changes, especially under the influence of heavy rainfall, many tunnels in China have experienced varying degrees of water gushing and mud gushing, and even serious landslides have occurred, posing a great threat to the normal operation and safety of tunnels. Water and mud inrush in tunne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 林春金潘光明谢云海于振张洪顺刘春国王凤伟张猛
Owner SHANDONG UNIV
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