Tunnel collapse treatment process and structure

A technology for processing technology and tunnels, which is applied in the direction of tunnels, tunnel linings, earthwork drilling and mining, etc., and can solve problems such as geological secondary landslides, hidden dangers, and anchor-spray failure safety, so as to reduce safety, impact, and The effect of safety hazards

Pending Publication Date: 2022-05-24
重庆市交通工程监理咨询有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the actual construction process of the above-mentioned technology, due to the relatively loose geology of the collapsed area, although the inner wall of the collapsed hole has been supported by the anchor shotcrete method, in the actual anchor shotcrete process, it is still easy to be damaged due to the vibration of the equipment. etc., resulting in a secondary landslide in the geology of the collapsed cave, leading to the failure of the initial anchor spraying and relatively large safety hazards

Method used

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  • Tunnel collapse treatment process and structure
  • Tunnel collapse treatment process and structure
  • Tunnel collapse treatment process and structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] refer to figure 1 and figure 2 , a tunnel collapse treatment process includes the following steps:

[0045] S1. Exclusion of water spray: A nozzle is installed in the collapsed cave or at the bottom, and the inner wall of the collapsed cave is scoured by high-pressure water through the nozzle, and the unstable rocks and earthwork in the collapsed cavern are cleaned up, thereby reducing the rock or earthwork in the subsequent construction process. The possibility of secondary landslides can effectively increase the safety in the subsequent construction process.

[0046] After the collapsed hole is stabilized, that is, after the initial infiltration and drainage of the water, a plurality of drainage holes are opened on the inner wall of the collapsed hole, and then a flushing pipe 1 is inserted in the drainage hole, and the flushing pipe 1 is inserted into the top wall of the drainage hole 30-60cm; Then, high-pressure water is poured into the collapsed cave through the...

Embodiment 2

[0059] refer to Figure 4 The difference between this embodiment and Embodiment 1 is that the specific steps of step S4 are as follows: when backfilling the collapsed hole with the support plate 41 as the construction platform, set up a plurality of filling grouting pipes distributed in sequence from top to bottom in the collapsed hole 5. The filling and grouting pipes 5 are annular and are respectively fixed and connected to different initial bolts 21, and the filling and grouting pipes 5 are arranged horizontally. The grouting pipe 5 can be made of an ordinary concrete grouting guide pipe, or the grouting pipe 5 can be formed by opening a grouting hole on the side wall of the pipe.

[0060] Further, the plurality of filling and grouting pipes 5 are connected with pump pipes 51 passing through the collapsed holes, so as to be used for pouring concrete into the filling and grouting pipes 5 . A filling valve 52 for controlling the passage of concrete is provided between the fi...

Embodiment 3

[0062] refer to Figure 5 The difference between this embodiment and Embodiment 1 is that the specific steps of step S4 are as follows: the support plate 41 is used as a construction platform in the collapsed hole, and the reinforcement formwork is hung on the initial anchor rod 21 at the top, and the reinforcement formwork is placed in the reinforcement formwork. The reinforcing support plate 44 is formed by pouring concrete, and after the reinforcing support plate 44 is cured, the reinforcing formwork located below is removed.

[0063] A reinforcing formwork is hung under the formed reinforcing support plate 44, and the next reinforcing support plate 44 is formed through the reinforcing formwork, thereby forming a plurality of reinforcing support plates 44 in sequence from top to bottom in the collapsed hole. Finally, the opening formed by the support plate 41 and the edge of the opening of the collapsed hole is closed. In order to achieve the support for the inside of the ...

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PUM

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Abstract

The invention relates to a tunnel collapse treatment process and structure, and the process comprises the following steps: S1, draining spraying water: arranging a spraying pipe in a collapsed hole or at the bottom, then remotely washing the inner wall of the collapsed hole with water, cleaning unstable rocks and earthwork in the collapsed hole, inserting a plurality of flushing pipes into the inner wall of the collapsed hole after the collapsed hole is stable, and then washing with water, further cleaning unstable rock and earthwork in the collapsed hole; s2, primary support: spraying concrete on the inner wall of the collapsed hole, and sealing and leveling the rock surface to form a primary support layer; a plurality of initial anchor rods are buried in the inner wall of the collapse hole, the initial anchor rods penetrate out of the initial supporting layer, secondary supporting grids are fixedly connected to the ends, penetrating out of the initial supporting layer, of the initial anchor rods, and then concrete is sprayed for the second time to form a secondary supporting layer; and S4, collapsed hole backfilling is conducted, specifically, concrete is backfilled in the collapsed hole. The method can effectively reduce the potential safety hazard of the collapse area to the subsequent construction.

Description

technical field [0001] The present application relates to the field of tunnel construction technology, in particular to a tunnel collapse treatment process and structure. Background technique [0002] In the process of tunnel construction, due to the complex geological conditions in the mountain, during the construction process, it is easy to cause landslides when the tunnel is excavated to an area with relatively loose geology; at this time, the top of the tunnel will be relatively Large collapse holes will have a certain impact on the lining of subsequent tunnels and the safety of construction. [0003] In the prior art, in order to reduce the impact of the collapse area on the safety of subsequent construction, the method of support is often used for treatment. The specific scheme is as follows: when supporting the collapsed cave, the inner arm of the collapsed cave is often consolidated by means of bolting and spraying, and the collapsed cave is supported by the bracket...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/00E21D11/15E21D20/00E21F16/02
CPCE21D11/105E21D11/00E21D11/152E21D20/00E21F16/02Y02A10/23
Inventor 唐小红刘泽昱林莉琼赵勇
Owner 重庆市交通工程监理咨询有限责任公司
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