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Construction method for preventing collapse of large-section tunnel lining reinforcing steel bars

A construction method and large-section technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., can solve problems such as deformation and collapse, and achieve the effect of firm support, fixed support and no cumbersome steps

Active Publication Date: 2020-07-28
ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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  • Abstract
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Problems solved by technology

For the lining of large-section and long-span tunnels, the construction of the first set of lining steel bars is particularly important. Due to the large-section and long-span structure of the tunnel, large deformations will inevitably occur during the installation and erection of the steel bars. The lining reinforcement has no other fixed connection, which leads to the risk of collapse due to large deformation and insufficient support during the construction of the reinforcement

Method used

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  • Construction method for preventing collapse of large-section tunnel lining reinforcing steel bars
  • Construction method for preventing collapse of large-section tunnel lining reinforcing steel bars
  • Construction method for preventing collapse of large-section tunnel lining reinforcing steel bars

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Embodiment Construction

[0038] The present invention can be explained in detail through the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0039] combined with Figure 1-4 The construction method for preventing the collapse of the lining reinforcement of large-section tunnels specifically includes the following steps:

[0040] (1) The opening of the initial support of the first set of lining steel bars or the position where the initial support section steel 11 is chiseled

[0041] When opening holes for the initial support of the first group of lining steel bars, select the construction position of the first group of lining steel bars, mark the longitudinal centerline at the position of the arch, and mark a point at intervals of 1.5m~2m along the longitudinal centerline; Mark a longitudinal line at intervals of 2m, and mark a point at intervals of 1.5m~2m along the longitudinal line; after ...

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Abstract

The invention provides a construction method for preventing collapse of large-section tunnel lining reinforcing steel bars, and relates to the technical field of tunnel construction. The constructionmethod comprises the steps that an opening hole is determined by the preliminary supporting of the first group of the lining reinforcing steel bars or the position of preliminary supporting profile steel is dig out; waterproof boards are paved; anchor rods are anchored or supporting ribs are welded; the penetrating positions of the waterproof boards are subjected to waterproof processing; positioning reinforcing steel bars are installed; external layer reinforcing steel bars are installed; internal layer reinforcing steel bars are installed; the reinforcing steel bars are trimmed; and protective layer supporting blocks are installed. The operation is simple and convenient, fixed supports are stable, and the collapse risk due to large deformation and poor supporting in the reinforcing steelbar construction process is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a construction method for preventing the collapse of lining steel bars of large-section tunnels. Background technique [0002] It is well known that with the rapid development of social economy, the requirements for convenient transportation are getting higher and higher, which in turn promotes the wider application of large-section and long-span tunnel technology. Its application is a manifestation of technological progress and can effectively reduce resource occupation. At the same time, it utilizes space resources to a greater extent, saves investment, and has more versatility. [0003] The support technology of underground engineering is inseparable from the combined support system of advanced support + initial support + waterproof board + reinforced concrete structure. Advance support pre-reinforces the weak ground before excavation, provides advanced pre-suppor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/18E21D11/10E21D11/38E21D20/00E21D20/02E21D11/28
CPCE21D11/003E21D11/10E21D11/107E21D11/18E21D11/28E21D11/38E21D11/383E21D20/003E21D20/025
Inventor 张玉强李茂兵赖红霞申涛马强王宁何佳洲
Owner ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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