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Repair and reinforcement construction methods for segments in formed tunnel

A construction method and tunnel segment technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as tunnel segment fragmentation repair and reinforcement, and achieve the effect of meeting operational safety requirements

Inactive Publication Date: 2014-03-19
SHANGHAI FOUND ENG GRP
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Problems solved by technology

[0004] The present invention is to provide a construction method for segment repair and reinforcement in a formed tunnel, which is used to solve the technical problems of tunnel segment repair and reinforcement

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  • Repair and reinforcement construction methods for segments in formed tunnel
  • Repair and reinforcement construction methods for segments in formed tunnel
  • Repair and reinforcement construction methods for segments in formed tunnel

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 Shown, the forming tunnel segment repair of the present invention and reinforcement construction method, concrete construction method is as follows:

[0039] (1) Segment repair measures:

[0040] 1) Division of Fragmentation Areas

[0041] According to the actual situation of the construction tunnel and the width of the train, the damaged parts of the segment 6 are divided into three parts, namely, the tunnel vault top, the waists on both sides of the tunnel, and the tunnel arch bottom track bed. The repair measures for different parts need to be considered separately, as follows:

[0042] ① Tunnel vault position: the 100° range of the tunnel’s upper vault, that is, the downward projection range covers the connection between block D and block B of the tunnel segment;

[0043] ② Tunnel arch bottom ballast bed location: the 90°...

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Abstract

The invention relates to repair and reinforcement construction methods for segments in a formed tunnel. The segment repair construction specifically comprises steps as follows: 1, segment fragmentation classification identification; 2, selection of repair measures; 3 surface cleaning of segment fragmentation; 4, drilling and steel bar embedding; 5, interfacial agent brushing; 6, reinforcement mesh binding; and 7, polymer repair mortar application. The segment reinforcement specifically comprises steps as follows: 1, caulking, grouting and hand hole blocking; 2, steel plate processing and corrosion prevention processing; 3, mounting of a protective steel plate; and 4, epoxy resin grout filling. The construction methods can solve the repair and reinforcement problems after large-area fragmentation in a propulsion and assembly process of the tunnel, and ensures that the formed tunnel meets an operation safety requirement.

Description

technical field [0001] The invention relates to a construction method for repairing and reinforcing segments in a formed tunnel. Background technique [0002] It has been 20 years since the construction of Shanghai rail transit. From the initial construction of Rail Transit Line 1 to the most recent construction peak to welcome the World Expo, Shanghai rail transit has formed a certain scale as a whole, and the total number of kilometers is also among the top in the world. With the successful conclusion of the World Expo, a new round of rail transit construction is gradually underway, and the focus will shift from progress to construction quality. [0003] Tunnel segment fragmentation is a common problem in shield tunnels. It is unavoidable during the construction process. Relevant repair work needs to be carried out in the later stage. How to improve the quality of segment repair and even take reinforcement measures to reduce hidden dangers after tunnel operation will be T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00
Inventor 张子敏李峰朱文良顾解桢
Owner SHANGHAI FOUND ENG GRP
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