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A Construction Method for Inverted Long Anchor Rod in Tunnel with Weak Surrounding Rock

A technology with weak surrounding rocks and construction methods, applied in tunnels, installation of bolts, tunnel lining, etc., can solve the problems of increasing the risk of inverted arch construction, slow support closure, and long time-consuming long bolts, etc., to achieve the benefit of machinery The effect of equipment deployment, control of vault sinking, and less material consumption

Active Publication Date: 2019-08-09
NO 4 ENG CO LTD OF CHINA RAILWAY 11 BUREAU GRP +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide an inverted arch for tunnels with weak surrounding rocks in view of the existing problems such as long time-consuming installation of long anchor rods, slow support closure, and increased risk of inverted arch construction in tunnel construction with weak surrounding rocks. Construction method of long anchor rod

Method used

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  • A Construction Method for Inverted Long Anchor Rod in Tunnel with Weak Surrounding Rock
  • A Construction Method for Inverted Long Anchor Rod in Tunnel with Weak Surrounding Rock

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Embodiment Construction

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] see Figure 1 to Figure 2 , a construction method of an inverted arch long bolt of a weak surrounding rock tunnel, when the initial support steel frame 3 of the inverted arch 8 is implemented, the pre-buried steel pipe 2 needs to be implemented at the position of the long bolt 1; 2 the bottom is connected with the initial support steel frame 3 by welding, and the top of the initial support steel frame 3 is flush with the filling surface and wrapped with non-woven fabric 6; This reinforces the weak rock formation at the bottom of the tunnel. Specifically include the following steps:

[0029] Step 1, construction preparation: determine the length of the corresponding embedded steel pipe 2 according to the design position of the long anchor rod 1, that is, determine the corresponding length of the embedded steel pipe 2 through the...

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Abstract

A construction method for a weak surrounding rock tunnel inverted arch long anchor rod comprises the steps of construction preparation, steel pipe (2) embedding, long anchor rod (1) manufacturing, staking out in survey, steel pipe embedding, long anchor rod manufacturing and anchor sealing. The engineering cost is reduced, the inverted arch closing time is shortened, the construction progress is accelerated, and construction organization of all parts and all procedures is facilitated.

Description

technical field [0001] The invention relates to a construction method of an anchor rod, in particular to a construction method of an inverted arch long anchor rod of a weak surrounding rock tunnel, and belongs to the technical field of tunnel construction. Background technique [0002] In a tunnel with weak surrounding rock, due to the broken rock mass, the surrounding rock has poor self-stabilizing ability, fast deformation rate, and large amount of deformation, so it is necessary to strengthen the support parameters and improve the support strength; therefore, it is necessary to apply an inverted arch in time to seal the support into a ring , in order to control the deformation of the surrounding rock, maintain the stability of the support, and ensure the safety of the construction. [0003] Setting long bolts in the inverted arch can effectively strengthen the weak rock formation at the bottom of the tunnel, enhance the self-stabilizing ability of the surrounding rock, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D21/00E21D20/00
CPCE21D11/18E21D20/003E21D21/00
Inventor 李行利汪伟刘志中王宁黄新宇
Owner NO 4 ENG CO LTD OF CHINA RAILWAY 11 BUREAU GRP
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