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Tunnel primary support reinforcement treatment method

A technology of initial support and treatment method, applied in tunnels, tunnel lining, earthwork drilling, etc., can solve the problems of poor reinforcement effect, affecting tunnel construction and operation, etc., to ensure stability, effectiveness and safety. Effect

Active Publication Date: 2021-01-05
ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the above technical problems, especially when the tunnel is in a complex karst pipeline system, such as the development of surrounding rock joints, fissures and fracture structures, and the groundwater is very rich, the effect of primary support and reinforcement through the existing technology is poor, which affects the tunnel. For the later construction and operation issues, the following technical solutions are proposed:

Method used

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  • Tunnel primary support reinforcement treatment method
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  • Tunnel primary support reinforcement treatment method

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Embodiment Construction

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but not to be construed as a limitation of the present invention.

[0047] It will be understood by those skilled in the art that the singular forms "a", "an", "the" and "the" as used herein can include the plural forms as well, unless expressly stated otherwise. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of features, integers, steps, operations, but does not exclude the presence or addition of one or more other features, integers, steps, operations.

[0048] It will be u...

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Abstract

The invention relates to a tunnel primary support reinforcement treatment method. The method comprises the following steps of constructing an intercepting ditch in a confluence ponding area, and draining the earth surface confluence ponding area; measuring and setting out a tunnel primary support risk section, determining a primary support reinforcing position, and grouting the primary support reinforcing position by arranging a small grouting guide pipe to realize primary support reinforcing; according to a clearance convergence monitoring point, a vault subsidence monitoring point and a ground surface subsidence monitoring point which are arranged at the primary support risk section, detecting the deformation amount of the primary support and the surrounding rock variation amount of theprimary support after grouting; and when the deformation amount of the primary support is not within the threshold range of the deformation amount of the primary support and the variation amount of the primary support surrounding rock is not within the threshold range of the variation amount of the primary support surrounding rock, carrying out slurry mixing and re-grouting. According to the method, the intercepting ditch is built in the water accumulation area to realize intercepting and drainage; and after grouting reinforcement of the primary support, continuous monitoring is conducted, grout is readjusted, unstable surrounding rock and the primary support are grouted again, and the stability of the primary support is guaranteed.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a processing method for initial support and reinforcement of a tunnel. Background technique [0002] During the construction of mountain highway tunnels, unfavorable geological conditions such as karst cavities and water-rich fault fracture zones are encountered from time to time, and the unfavorable geology can easily lead to water inrush and mud inrush and tunnel deformation. In karst tunnels with abundant water and developed fissures, the excavation of the tunnel can easily induce water inrush, while the initial support cracking water inrush occurs with the inrush water, which endangers the safety of tunnel construction and operators, and seriously affects the tunnel. In the later construction and operation, it is necessary to deal with the water and mud inrush and tunnel deformation often caused by bad geological conditions in a timely and effective manner. [0003...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21F16/02E21D11/18E21F17/00
CPCE21D11/10E21F16/02E21D11/18E21F17/00
Inventor 姜冰王方立韩晓东葛浪潮曹敏
Owner ROAD & BRIDGE SOUTH CHINA EINGINEERING CO LTD
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