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Method for utilizing combined structure to conduct shield tunnel strengthening

A technology of shield tunnel and combined structure, applied in tunnels, tunnel linings, mining equipment and other directions, can solve the problems of I-beams occupying a large headroom, easily unstable under pressure, not very optimistic, etc., and achieves good temperature resistance performance. , Improve safety and reliability, and enhance the effect of reinforcement

Active Publication Date: 2015-07-22
上海同禾工程科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the I-beam has the disadvantages of occupying a large headroom and is prone to instability under pressure, and the ability to connect with bolts to ensure the overall work of the components is not very optimistic.

Method used

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  • Method for utilizing combined structure to conduct shield tunnel strengthening
  • Method for utilizing combined structure to conduct shield tunnel strengthening
  • Method for utilizing combined structure to conduct shield tunnel strengthening

Examples

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Embodiment

[0038] refer to Figure 1 ~ Figure 3 , a method for shield tunnel reinforcement using a composite structure, comprising the following steps:

[0039] (1) Chisel the inner surface of the original segment 1 of the tunnel, and use planting glue to plant bars according to a certain distance. Each ring segment is divided into 3-4 rows of planting bars, in order to avoid excessive weakening of the same section Each row of planting bars 6 is staggered laterally (to ensure that no more than two planting bars 6 appear in the same section) or arranged in a quincunx shape, wherein one end of planting bars 6 protruding from the original tunnel segment 1 is provided with a hook. The advantage of using planting glue is that it has high bonding strength, like pre-embedding, curing at room temperature, small shrinkage during hardening, good temperature resistance, can be welded after embedding, good durability, weather resistance, aging resistance, and medium resistance (acid, alkali, water)...

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Abstract

The invention relates to a method for utilizing a combined structure to conduct shield tunnel strengthening. The method comprises the following steps that steel bar planting is conducted on the inner surfaces of tunnel original duct pieces; steel bar nets are arranged at the inner sides of the tunnel original duct pieces, and the steel bar nets are fixed to the planted steel bars; steel plates matched with the shapes of the tunnel original duct pieces of the tunnel are produced, and cotters are welded at the outer sides of the steel plates; the steel plates are closed to the tunnel original duct pieces, concrete is poured between the steel plates and the tunnel original duct pieces, the concrete fixes the steel bar nets to the inside, and the concrete is cured to a designed strength. Compared with the prior art, the combined structure including the steel plates, the steel bar nets, the planted steel bars, cotters and the concrete is adopted to shield tunnel strengthening for the first time. The method for utilizing the combined structure to conduct shield tunnel strengthening has the advantages that the durability is good, material drawing is convenient, construction is rapid, the economic benefit is good, the strengthening degree is high, the strengthening rigidity is large, and fissure controlling is efficient.

Description

technical field [0001] The invention relates to a method for reinforcing a shield tunnel, in particular to a method for reinforcing a shield tunnel by adopting a combined structure. Background technique [0002] With the increase of operating years, some subway shield tunnel structures have gradually exposed some structural diseases. It can be mainly divided into two types: local damage and overall large deformation of the tunnel structure. Local damage includes: water leakage, cracks, missing corners, etc.; overall deformation of the tunnel structure includes: joint opening, segment displacement, segment deformation, etc.; some tunnels also have the problem of longitudinal settlement. Local damage to the structure has affected the normal operation of the shield tunnel, and if it continues to develop, it may affect the normal driving safety; and the large deformation of the tunnel structure will seriously affect the safe operation of the shield tunnel and the safety and rel...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/08E21D11/105
Inventor 柳献蒋首超蒋子捷叶宇航
Owner 上海同禾工程科技股份有限公司
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