Construction method of prefabricated support structure for tunnels in alpine regions

A supporting structure and construction method technology, applied in the direction of tunnels, tunnel linings, shaft equipment, etc., can solve the problems of time consumption, many processes, and influence on the progress of construction, so as to reduce the number of processes, improve the working environment, and improve the construction efficiency. efficiency effect

Active Publication Date: 2021-04-02
中铁隧道局集团建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the existing construction method, the initial support structure and the secondary lining structure must be assembled with supporting steel frames, steel mesh installation and sprayed concrete, etc., and the process is already complicated enough. There are more processes and time consumed, which will seriously affect the progress of construction

Method used

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  • Construction method of prefabricated support structure for tunnels in alpine regions
  • Construction method of prefabricated support structure for tunnels in alpine regions
  • Construction method of prefabricated support structure for tunnels in alpine regions

Examples

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Comparison scheme
Effect test

Embodiment 1

[0043] A construction method for a prefabricated support structure of a tunnel in an alpine region, comprising the following steps:

[0044] 1) Manufacture of permeable concrete components: After the permeable pipes are preset in the permeable concrete component molds, sand-free concrete is used to pour into block structures to obtain permeable concrete components. It protrudes from the front of the permeable concrete member; the mass ratio of sand-free concrete is: cement: crushed stone: water = 1:4.53:0.23, and it is processed in a factory-style block. use 10HPB300 steel bars are used as connecting bars with a spacing of 20cm×20cm.

[0045] 2) The permeable concrete component and the supporting concrete layer are poured together to form a splicing block: using factory centralized processing, the permeable concrete component is put into the forming mold as the bottom layer, and then a layer of waterproof material is sequentially laid on the front of the permeable concrete c...

Embodiment 2

[0049] A construction method for a prefabricated support structure of a tunnel in an alpine region, comprising the following steps:

[0050] 1) Manufacture of permeable concrete components: After the permeable pipes are preset in the permeable concrete component molds, sand-free concrete is used to pour into block structures to obtain permeable concrete components. It protrudes from the front of the permeable concrete member; the mass ratio of sand-free concrete is: cement: crushed stone: water = 1:4.53:0.23, and it is processed in a factory-style block. use 10HPB300 steel bars are used as connecting bars with a spacing of 20cm×20cm.

[0051] 2) The permeable concrete component and the supporting concrete layer are poured together to form a splicing block: using factory centralized processing, the permeable concrete component is put into the forming mold as the bottom layer, and then a layer of waterproof material is sequentially laid on the front of the permeable concrete c...

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Abstract

The invention discloses a construction method of an assembly type supporting structure for a high cold area tunnel, wherein the steps of prefabricating splicing blocks and then splicing the splicing blocks in the high cold area tunnel to form the supporting structure are included, wherein each splicing block includes a previous concrete layer on the outermost layer, a support concrete layer on theinnermost layer, and an insulating layer positioned between the previous concrete layer and the support concrete layer; a pervious pipe is buried in each previous concrete layer, and penetrates through the insulating layer and the support concrete layer and then forms a drainage port. According to the invention, the splicing blocks are prefabricated and then are spliced in the tunnel section by section, so that the procedure amount during the construction of the supporting structure is reduced, the cycling time is reduced, the working environment is improved, and the construction progress isimproved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and more specifically, the invention relates to a construction method for an assembled support structure of a tunnel in an alpine region. Background technique [0002] The temperature in the tunnel in the alpine region is very low, and the heat in the tunnel rock formation is easily dissipated quickly through the supporting structure layer, causing the water in the rock formation near the tunnel to freeze and cannot be discharged smoothly. Therefore, the technical issues of thermal insulation and drainage need to be considered in the construction of the support structure layer of the tunnel in the alpine region. [0003] The support structure of the tunnel generally includes: primary support structure and secondary lining structure. In order to solve the problem of icing and drainage obstacles in the alpine region, the existing technology usually adds an insulation layer between the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08E21D11/38E21F16/02
CPCE21D11/08E21D11/38E21F16/02
Inventor 莫智彪王小平陈世凯张瑞刘德美崔明亮吴东华代彦华邓伟刘凡金
Owner 中铁隧道局集团建设有限公司
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