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Construction method suitable for soft rock bedding tunnel

A construction method and technology for tunnels, which are applied in tunnels, tunnel linings, earthwork drilling and other directions to achieve the effects of controlling deformation, reducing the probability of large deformation and landslides, and reducing the degree of disturbance of surrounding rock.

Active Publication Date: 2019-08-02
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method suitable for soft rock bedding tunnels in view of the problem that there is no mature design and construction method for the bedding bias tunnel in the prior art

Method used

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  • Construction method suitable for soft rock bedding tunnel
  • Construction method suitable for soft rock bedding tunnel

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Embodiment

[0024] see figure 1 and figure 2 . Embodiments of the present invention provide a construction method suitable for bedding tunnels in soft rock, which includes the following steps:

[0025] S1. Excavate the core soil I of the upper step on the anti-tilt side, and construct the first support system;

[0026] see figure 1 and figure 2 . Specifically, in step S1, applying the first support system includes: applying the anti-inclination side arch waist anchor 21 and the anti-inclination side wall anchor 22, and applying the steel frame reinforcement layer 30 and the anti-inclination side arch waist-cis-inclination side arch Foot temporary support upper section 40a, forward side arch waist-anti-inclination side arch bottom temporary support upper section 50a, along-inclination side arch waist-anti-inclination side arch bottom temporary support middle section 50b and the left section 60a of the side wall temporary support, and the side wall temporary support left The left si...

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Abstract

The invention relates to the field of tunnel support, in particular to a construction method suitable for a soft rock bedding tunnel, which comprises the following steps: S1, excavating reverse-tilting upper step core soil, and constructing a first support system; S2, excavating core soil of the lower step of the reverse side, and constructing a second supporting system; S3, excavating upper stepcore soil along the inclined side, and constructing a third support system; S4, excavating core soil of the lower step along the inclined side, and constructing a fourth support system; and S5, disassembling the temporary support, and constructing a secondary lining. According to the construction method, reasonable excavation steps and supporting structures are adopted in a targeted mode accordingto the bias deformation characteristic of the bedding tunnel and the surrounding rock stability difference, deformation during tunnel construction can be effectively controlled, surrounding rock self-bearing is given to full play, the surrounding rock stability is improved, and therefore the construction risk and the engineering cost are reduced.

Description

technical field [0001] The invention relates to the field of tunnel support, in particular to a construction method suitable for bedding tunnels in soft rock. Background technique [0002] Layered soft rock has a wide range of distribution in my country. When tunnels are excavated in such rock formations, the layered rock mass will slide along the structural plane of the rock formations, and a bias load will be generated on the tunnel support structure. It is related to factors such as rock structure plane. In recent years, geological bedding-biased tunnel diseases have occurred frequently, and many main railway lines have experienced landslides, large deformations, steel frame distortions, primary support and secondary lining cracks during the construction and operation stages. Operations were adversely affected. [0003] At present, there is no mature design and construction method for tunnels in the bedding bias section, and empirical analogy design and step method are...

Claims

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Application Information

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IPC IPC(8): E21D9/00E21D20/00E21D11/14E21D19/04
CPCE21D9/00E21D11/14E21D19/04E21D20/00
Inventor 胡炜蒋尧谭信荣李奎喻渝尚寒春李老三刘雄伟唐茂皓陶伟明张永平
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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