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Large-diameter shield tunnel deformation control structure and construction method thereof

A technology for shield tunneling and deformation control, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effect of increasing the anti-pull effect, preventing uneven floating or settlement, and low work efficiency

Active Publication Date: 2021-07-20
江苏中车城市发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no effective prevention and control measures for large-diameter tunnel convergence deformation or longitudinal uneven floating and settlement deformation. Usually, targeted reinforcement treatment is carried out after excessive deformation occurs or even leads to catastrophic accidents

Method used

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  • Large-diameter shield tunnel deformation control structure and construction method thereof
  • Large-diameter shield tunnel deformation control structure and construction method thereof
  • Large-diameter shield tunnel deformation control structure and construction method thereof

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Embodiment Construction

[0058] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0059] Such as figure 1 As shown, the deformation control structure of a large-diameter shield tunnel provided by this embodiment includes a bag-expanded prestressed anchor rod 1, a bag-expanded prestressed anchor rod 3, a water storage tank 2 and a control system.

[0060] Such as Figure 2-4 As shown, the bladder expansion type drainage prestressed anchor 1 is composed of a bladder expansion type drainage prestressed anchor body 1-1, a drainage channel 1-2, a first grouting body 1-3, a first prestressed Composed of stress steel bars 1-4 and first grouting pockets; said pockets expand type drainage prestressed anchor main body 1-1 and intersect and run through the first grouting holes 1-1-1 and drainage holes in the circumferential direction 1-2-1; Drainage channels 1-2 are arranged on the inner side of the bladder expansion type drainage p...

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Abstract

The invention discloses a large-diameter shield tunnel deformation control structure and a construction method thereof. The structure is installed in the construction period of a shield tunnel and comprises a bag expansion type dewatering and drainage pre-stressed anchor rod, a bag expansion type pre-stressed anchor rod, a water storage and drainage tank and a control system. The contact area between the bag expansion type dewatering and drainage pre-stressed anchor rod and a soil layer below the shield tunnel and the contact area between the bag expansion type dewatering and drainage pre-stressed anchor rod and a soil layer above the shield tunnel are increased through expansion type bags, the pulling resistance is increased, and uneven floating or settlement disasters of the large-diameter shield tunnel can be effectively prevented; prestress is symmetrically applied to the bag expansion type dewatering and drainage pre-stressed anchor rod and the bag expansion type pre-stressed anchor rod, resistance for convergence deformation is formed on a large-diameter shield tunnel section, and convergence deformation of the large-diameter shield tunnel section and engineering diseases possibly caused by the convergence deformation are effectively prevented and treated; and floating or sedimentation of the large-diameter shield tunnel is controlled through the combined effect of the bag expansion type dewatering and drainage pre-stressed anchor rod and the water storage and drainage tank.

Description

technical field [0001] The invention relates to the technical field of convergence deformation control of shield tunnels, in particular to a large-diameter shield tunnel deformation control structure and a construction method thereof. Background technique [0002] In recent years, many large-diameter shield tunnel projects have been planned and built in large and super-large cities at home and abroad, and the traffic lanes or tracks of urban underground traffic have been increased through driving modes such as "double tunnels and double tracks" and "highway-rail mixed traffic" To a certain extent, it increases the efficiency of vehicle traffic, relieves traffic pressure, and provides the impetus for urban development. [0003] The well-developed urban shallow space and the demand for the construction of river-crossing tunnels and sea-crossing tunnels have led to an increasing burial depth of newly added large-diameter tunnels. For large-diameter shield tunnels passing throu...

Claims

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Application Information

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IPC IPC(8): E21F16/02E21D11/38E21D21/00E21D20/02E21F17/18E21D11/18E21D11/28
CPCE21F16/02E21D11/38E21D21/0026E21D21/0093E21D21/0086E21D20/02E21D20/028E21F17/18E21D11/18E21D11/28
Inventor 刘春桃齐太山王波林强王浩豆红尧周鑫苏光旭
Owner 江苏中车城市发展有限公司
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