Supporting structure of tunnel in bias salt cavity environment and construction method of supporting structure

A technology of support structure and construction method, applied in tunnels, tunnel linings, underground chambers, etc., can solve problems such as tilting, collapse, and deformation of tunnel support structures, and achieve guaranteed support effects, reliable support effects, and construction The effect of simple process

Inactive Publication Date: 2015-12-23
中铁二十五局集团第四工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When constructing in a biased solution cavity environment, due to the existence of bias, the tunnel support structure is prone to inclination, deformation, or even collapse, which brings safety risks

Method used

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  • Supporting structure of tunnel in bias salt cavity environment and construction method of supporting structure
  • Supporting structure of tunnel in bias salt cavity environment and construction method of supporting structure
  • Supporting structure of tunnel in bias salt cavity environment and construction method of supporting structure

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Experimental program
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Embodiment Construction

[0023] A tunnel support structure in a biased solution cavity environment, such as Figure 1-4 , in the tunnel 1, during the excavation construction process of the tunnel, a series of portal frames 2 arranged longitudinally and the steel wire mesh 3 provided on the tunnel wall are gradually arranged, and the portal frame is connected with the steel wire mesh provided on the tunnel wall through the support 4, and the steel mesh support; on the periphery of the tunnel, anchor rods 5 radially driven into the outer soil body are arranged, and the steel wire mesh is also fixedly connected with these anchor rods; There are multiple anchor cables 7 that go deep into the stable rock foundation 6 from the tunnel wall. The anchor cables are arranged horizontally or slightly upward; 6, the other end is anchored on the anchorage 8 set at the entrance of the anchor cable on the tunnel wall, and the anchorage is installed on the anchor cap 9 arranged at the entrance of the anchor cable, and...

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Abstract

The invention discloses a supporting structure of a tunnel in a bias salt cavity environment and a construction method of the supporting structure. The supporting structure comprises gate-type frameworks, a steel mesh arranged on the wall of a tunnel and supported by the gate-type frameworks via supporting parts, anchor rods arranged at the periphery of the tunnel and connected into a whole with the steel mesh, and a plurality of anchor cables arranged on the two sides of the tunnel and between the adjacent gate-type frameworks and going deep into a stable batholith from the wall of the tunnel, wherein the two ends of the anchor cables are tensioned on the stable batholith and anchor devices arranged at the inlets of the anchor cables on the wall of the tunnel. By the adoption of the structure, the constructed tunnel is supported in multiple ways, the prestress anchor cables which are tensioned on two sides can adapt to the situation of different pressures on the two sides of the tunnel, the tunnel can be well supported in the same situation, and deformation of the supporting structure and collapse of the tunnel, caused by biasing of the tunnel, are prevented.

Description

technical field [0001] The invention relates to a support structure used in tunnel construction and a tunnel construction method. Background technique [0002] When roads and railways pass through mountains, tunnels need to be built, and the tunnel construction process is greatly affected by the resistive environment. When the tunnel construction encounters karst and fractured structures, the construction is very difficult. During construction, the tunnel or the periphery of the tunnel will encounter multiple large and medium-sized dissolved cavities. Because the tunnel is located in the dissolved cavity and the filling conditions in the dissolved cavity are different For other reasons, it will lead to uneven force on both sides of the tunnel, resulting in bias voltage and the formation of bias voltage dissolution cavity. When constructing in a biased solution cavity environment, due to the existence of biased pressure, the tunnel support structure is prone to inclination, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/14E21D21/00E21D20/02
Inventor 韦庆武武睿李勇良谭志乾刘晓煜李先健韦露明蔡文胜符望春
Owner 中铁二十五局集团第四工程有限公司
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