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A large-diameter shield tunnel deformation control structure and its construction method

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: 2022-05-06
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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  • A large-diameter shield tunnel deformation control structure and its construction method
  • A large-diameter shield tunnel deformation control structure and its construction method
  • A large-diameter shield tunnel deformation control structure and its construction method

Examples

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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 during the construction period of the shield tunnel, and includes a bag-enlarged drainage prestressed anchor rod and a bag-expanded prestressed anchor rod , storage and drainage tank and control system; the present invention increases the contact area of ​​the bag-enlarged drainage prestressed anchor rod and the bladder-expanded prestressed anchor rod with the soil layer below and above the shield tunnel respectively by expanding the bladder , increasing the pull-out resistance can effectively prevent uneven floating or subsidence disasters in large-diameter shield tunnels; apply prestress symmetrically to the bag-enlarged drainage prestressed anchor rod and the bag-enlarged prestressed anchor rod. The resistance to convergent deformation is formed on the section of the diameter shield tunnel, which can effectively prevent the convergence deformation of the section of the large-diameter shield tunnel and the engineering diseases that may be caused; through the joint action of the bag-enlarged drainage prestressed anchor rod and the storage and drainage box, control Floating or sinking of large diameter shield tunnels.

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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Patent Type & Authority Patents(China)
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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