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A Construction Method for Preventing Collapse of Large Section Tunnel Lining Reinforcing Bar

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 effects of firm support, convenient preparation, and firm connection

Active Publication Date: 2021-07-13
ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Construction Method for Preventing Collapse of Large Section Tunnel Lining Reinforcing Bar
  • A Construction Method for Preventing Collapse of Large Section Tunnel Lining Reinforcing Bar
  • A Construction Method for Preventing Collapse of Large Section Tunnel Lining Reinforcing Bar

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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 discloses a large-section tunnel lining steel reinforcement anti-collapse construction method, which relates to the technical field of tunnel construction. When the first group of lining steel reinforcement initial support is opened, the location of the opening or initial support section steel is determined, the steps of laying waterproof boards, and anchor rods are disclosed. The steps of anchoring or welding the supporting ribs, waterproofing the penetration position of the waterproof board, installing the positioning steel bars, installing the outer layer steel bars, installing the inner layer steel bars, trimming the steel bars, and installing the protective layer pads complete the construction; the invention is easy to operate, The fixed support is stable, which effectively avoids the risk of collapse due to large deformation and insufficient support during the construction of the steel bar.

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 Patents(China)
IPC IPC(8): E21D11/00E21D11/18E21D11/10E21D11/38E21D20/00E21D20/02E21D11/28
CPCE21D11/003E21D11/10E21D11/107E21D11/18E21D11/28E21D11/38E21D11/383E21D20/003E21D20/025
Inventor 张玉强陈凤熔赖红霞申涛马强王宁何佳洲
Owner ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP