Reinforcement method of shield tunnel segment

A shield tunnel segment and segment technology, which is applied to tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of complex tunnel reinforcement and high cost, and achieve the effects of fast construction, low cost and stable performance.

Inactive Publication Date: 2017-08-11
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a reinforcement method for shield tunnel segments, which solves the problems of complicated tunnel reinforcement and high cost

Method used

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  • Reinforcement method of shield tunnel segment
  • Reinforcement method of shield tunnel segment

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Embodiment 1

[0022] Figure 1-Figure 2 It shows a reinforcement method for shield tunnel segments. Firstly, the inner wall of segment 1 in the shield tunnel reinforcement section is notched and chiseled, and the key areas of damage to the segment structure are generally chiseled at the capping block and joints. Remove the concrete protective layer to expose the stressed steel bar 3 in the shield tunnel segment; avoid the main steel bars of the segment, drill holes along the axial and radial distribution of the segment 1, inject reinforcement glue into the hole, and then implant positioning steel bars 5. The end of the positioning reinforcement bar 5 is the thickness mark of the sprayed ultra-high performance soil (UHPC), with a thickness of 50-100 mm; then the bound reinforcement mesh 4 is fixed on the stressed reinforcement bar 3 and the positioning reinforcement bar 5 by welding, and the reinforcement bar Mesh 4 includes axial steel bars 41 and circumferential steel bars 42; clean scum t...

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Abstract

The invention relates to a construction method, in particular to a reinforcement method for a shield tunnel segment. The method comprises the following steps of 1, engraving and rough chiseling treatment; 2, hole drilling and bar planting; 3, steel-bar net making; 4, cleaning; 5 humidification; 6, concrete spraying. The reinforcement method for the shield tunnel segment is quick in construction and low in cost, it can be ensured that a reinforced body and the segment are deformed in a coordination mode and stable in performance, the problem of reinforcing a shield tunnel after a large area of fragmentation occurs due to nearby construction in the propulsion process and in the operation process can be solved, and it is ensured that the tunnel meets the requirements for operation safety.

Description

technical field [0001] The invention relates to a construction method, in particular to a reinforcement method for a shield tunnel segment. Background technique [0002] At present, the damaged segment structure is repaired and reinforced inside the tunnel. According to different segment damage conditions, two methods are usually used: the first method is to paste fiber sheets such as aramid cloth which is soft and can only bear tensile force on the damaged segment. In the tensile area of ​​the shield tunnel segment, the tensile performance of the segment and the joint position can be improved, but this method cannot greatly improve the structural rigidity, and the reinforcement effect is affected by the degree of deformation of the tunnel, that is, the tunnel The smaller the deformation, the better the reinforcement effect. The second method is to strengthen the damaged shield tunnel segments with internal tension steel plates to improve the overall load-bearing performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08
Inventor 陈仁朋鲁立刘源吴熠文张品
Owner HUNAN UNIV
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