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Segment joint water leakage treatment method of shield tunnel in operation period

A technology for shield tunneling and water leakage, applied in tunnels, tunnel lining, drainage, etc., can solve the problems of filling material cracks, loss of waterproof effect, etc., to achieve high impermeability and elongation, improve treatment efficiency, and good leakage repair effect of effect

Active Publication Date: 2019-12-31
中交隧桥(南京)技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When water leakage occurs at the joint, the grouting method is mainly used to fill the joint of the segment where the segment leaks to achieve sealing and water sealing. The grouting medium is cured with modified epoxy resin, water glass cement double slurry, etc. The material with a small post-deformation is the main material. When the joints of the tunnel segments deform again, the injected filling material will crack and lose the waterproof effect

Method used

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  • Segment joint water leakage treatment method of shield tunnel in operation period
  • Segment joint water leakage treatment method of shield tunnel in operation period
  • Segment joint water leakage treatment method of shield tunnel in operation period

Examples

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Effect test

Embodiment 1

[0036] This embodiment relates to a treatment method for water leakage at segment joints

[0037] Such as Figure 1-3 , there is a joint 100 between two adjacent segments 300 in the shield tunnel 400 during an operation period, the segment joint 100 includes a longitudinal joint 12 along the direction of the tunnel and a circumferential direction along the arc direction of the shield tunnel seams11.

[0038] In this embodiment, according to the above-mentioned segment joints in the shield tunnel 400 , the treatment method for joint water leakage includes: cleaning the segment joints, constructing a first leak-trapping sealing layer and building a second leak-trapping sealing layer.

[0039] Cleaning the segment joints is to clean the segment joints in the leaking water area on the inner side of the segment joints, and insert water-swellable water-stop strips 5 into the cleaned segment joints, A grouting chamber 130 is formed on the outer side of the water-expandable water-st...

Embodiment 2

[0050] This embodiment is based on one of the sealing strips 2 used in the method described in Embodiment 1.

[0051] The inner seam structure on the inner side of the segment is as follows: Figure 8 , including a wide slit 102 and a narrow slit 101 arranged from inside to outside, wherein: the narrow slit 101 is formed by two parallel straight wall surfaces 1011; The side wedge-shaped wall surface is formed with two inclined wall surfaces 1021 of the straight wall surface. The straight wall surface 1011, the wedge-shaped wall surface 1022 and the inclined wall surface 1021 are produced by the design structure of the joint side of the segments.

[0052] Such as Figure 9 In the present invention, the sealing strip 2 includes a first body 20 , a second body 21 , a sealing rib 25 and sealing teeth 24 . The second body 20 is disposed at the lower part of the first body 21 and is integrally formed. The width of the second body 21 is greater than that of the first body 20 . Tw...

Embodiment 3

[0060] This embodiment is based on another sealing strip 2 used in the method described in Embodiment 1.

[0061] Such as Figure 11 , Figure 12 , this embodiment also includes a sealing strip 2 and a core 3, the structure of the sealing member 2 is basically the same as that of the above-mentioned embodiment 2, the only difference is that the structure of the insertion groove 211 is different, and the insertion groove 221 is arranged The center of symmetry of the body 21 is formed by several circular holes 212 arranged along the height direction and opening grooves 213 connecting the several circular holes. The corresponding core 3 is a bar with a T-shaped cross-section composed of horizontal plates and vertical plates, and the core 3 is inserted into the insertion groove 211 through the vertical plates.

[0062] Other structures of this embodiment are the same as those of Embodiment 2 and have the same performance and effect, and will not be repeated here.

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Abstract

The invention discloses a segment joint water leakage treatment method of a shield tunnel in an operation period. The segment joint water leakage treatment method of the shield tunnel in the operationperiod takes blocking as the main purpose, combines the blocking with discharging, adjusts measures to local conditions, and comprehensively treats water leakage. In the tunnel maintenance process, the segment joint water leakage treatment method of the shield tunnel in the operation period adopts the comprehensive treatment construction method including the steps of filling segment joints with acrylate in a pouring mode for blocking water, using EPDM (ethylene propylene diene monomer) strips for filling the joints again to achieve water resistance and preforming water outlet channels in thejoints preformed in two sides of the tunnel for discharging water, and achieves good treatment effect.

Description

Technical field: [0001] The invention relates to a treatment method for water seepage at joints of segments in a shield tunnel during an operation period. Background technique: [0002] Tunnel water leakage is a common phenomenon in shield tunnels at home and abroad, and it is the main disease during the operation of shield tunnels, and water leakage is mainly at the joints of segments. At present, the main method of waterproofing domestic segment joints is to install water-stop rubber strips in the joints during construction, and fill the caulking grooves with materials such as neoprene cement or polyurethane sealant. When water leakage occurs at the joint, the grouting method is mainly used to fill the joint of the segment where the segment leaks to achieve sealing and water sealing. The grouting medium is cured with modified epoxy resin, water glass cement double slurry, etc. The material with a small amount of post-deformation is the main material. When the joints of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38E21F16/02
CPCE21D11/38E21D11/385E21F16/02E21D11/386E21D11/388
Inventor 张英明时小群罗良乾李东彪管雪峰张捷陆帅侯登志常皖靖马济昶
Owner 中交隧桥(南京)技术有限公司
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