Karst stratum tunnel secondary lining renovation construction structure and method based on sleeve lining

A tunnel and lining technology is applied in the field of tunnel secondary lining remediation and construction, which can solve the problems of inability to lining the tunnel secondary lining, the quality of the lining cannot be guaranteed, and the tunnel secondary lining cannot be rectified.
CN110761804APending Publication Date: 2020-02-07THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
Publication Date
2020-02-07

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Abstract

The invention discloses a karst stratum tunnel secondary lining renovation construction structure and method based on a sleeve lining. The structure comprises a grouting anchoring structure for supporting a tunnel section arch wall needing to be renovated and a strengthening sleeve lining for strengthening the tunnel section arch wall needing to be renovated. The strengthening sleeve lining is arranged on the inner side of a tunnel secondary lining, and the grouting anchoring structure is arranged on the outer side of the strengthening sleeve lining. The method comprises the steps including the first step of structural steel arch frame installing, the second step of grouting anchoring construction, the third step of tunnel secondary lining inner wall roughening treatment, the fourth step of arch-shaped steel bar structure construction and the fifth step of concrete sleeve lining construction. According to the karst stratum tunnel secondary lining renovation construction structure and method, design is reasonable, construction is simple and convenient, and the usage effect is good; the surrounding rock on the outer side of the tunnel section needing to be renovated is integrally strengthened through the grouting anchoring structure, and the tunnel outer side surrounding rock and the tunnel support structure are fastened and connected into a whole; and meanwhile, the strengthening sleeve lining is arranged in the tunnel secondary lining, the support strength and the support effect of the constructed formed sleeve lining are further effectively improved, and the renovation effect of the tunnel secondary lining is ensured.
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Description

technical field

[0001] The invention belongs to the technical field of tunnel secondary lining renovation construction, and in particular relates to a lining-based construction structure and method for secondary lining renovation of tunnels in karst formations. Background technique

[0002] With the continuous development of high-speed railways, single-hole and double-track tunnels that pass through complex geological conditions are becoming more and more common, and the number of tunnel defects that they face is also increasing. The upper part of the lining concrete is voided and the steel frame is twisted and deformed, which further increases the risk of collapse and seriously threatens driving safety. Karst geology is mainly the result of chemical dissolution and mechanical damage to soluble rock formations due to runoff, recharge, infiltration and circulation of surface water and groundwater. After the construction of the tunnel passing through the karst strata (that is...

Claims

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