Method for reinforcing cracked and damaged lining of operation tunnel

A technology of lining and crack damage, which is applied in the direction of tunnel lining, tunnel lining, shaft lining, etc., can solve the problems of high construction cost, large impact on tunnel operation, frequent falling off of sprayed materials, etc., and achieve the effect of small economy

Active Publication Date: 2014-10-29
CENT SOUTH UNIV
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AI Technical Summary

Problems solved by technology

Ordinary spraying method is difficult to ensure that the sprayed material and the lining are connected as a whole, and the sprayed material often falls off after deterioration, and the reinforcement effect is difficult to guarantee
The cast-in-place concrete method requires a large margin in the tunnel clearance, and the method takes a long time to construct, has a great impact on the operation of the tunnel, and has a high construction cost.
The main purpose of arch reinforcement is to control the lining with high possibility of spalling and spalling. It is usually used as an emergency remedial measure. When it is used alone, it needs anti-rust treatment before it can be used as a permanent component. Compared with the lining, the stiffness of the reinforced arch is lower. Small, it is difficult to achieve the desired reinforcing effect when used alone

Method used

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  • Method for reinforcing cracked and damaged lining of operation tunnel
  • Method for reinforcing cracked and damaged lining of operation tunnel
  • Method for reinforcing cracked and damaged lining of operation tunnel

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Embodiment Construction

[0029] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] see figure 1 , figure 2 and image 3 , the method for reinforcing and reinforcing the cracked lining of the operating tunnel provided by the present invention, the cracked lining is reinforced by using anchor rods, steel mesh, ribbed steel bars, and shotcrete, and the lining and surrounding rock are integrated to improve the lining structure. The overall stability of the system includes the following steps:

[0031] a. Clean the lining surface: remove impurities such as decorative layers, oil stains, and floating dust on the concrete surface;

[0032] b. Judgment of headroom: According to the measurement data and limit size of the headroom section, for the part with insufficient headroom, the lining shall be properly chiseled to ensure that the sprayed concrete does not invade the limit after covering;

[0033] c. Con...

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Abstract

The invention discloses a method for reinforcing a cracked and damaged lining of an operation tunnel. An annular reinforcing structure is mainly formed by ribbing steel bars, anchor rods, a steel bar mesh and jetting concrete, and therefore the cracked and damaged lining is reinforced. The method is easy to implement, the lining of the tunnel can be prevented from being detached and changed on a large scale, the influence on tunnel operation is reduced to the maximum, the repairing construction method and technology are fast and rapid to conduct, the repairing time can be greatly shortened, and the construction process and structure safety can be ensured. Thus, by means of the structure, great economic benefits can be brought, and the method is particularly suitable for reinforcing of the lining of the operation tunnel.

Description

technical field [0001] The invention relates to a method for reinforcing tunnel linings, in particular to a method for reinforcing and reinforcing cracked and damaged linings of operating tunnels. Background technique [0002] After the tunnel is completed, due to the effects of topography, geology, and climate conditions, as well as factors such as low tunnel design standards or poor design considerations, construction not strictly in accordance with specifications, and insufficient maintenance, the lining may appear cracks to varying degrees during operation. The damage will reduce the stability and safety of the tunnel structure, and even endanger the driving safety. Therefore, it is necessary to reinforce the cracked lining. Lining structure reinforcement is commonly used for lining (spray method and cast-in-place concrete method) or arch reinforcement. Ordinary spraying method is difficult to ensure that the sprayed material is integrated with the lining, and the spra...

Claims

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Application Information

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IPC IPC(8): E21D11/00
Inventor 肖小文阳军生杨峰刘锦成王立川
Owner CENT SOUTH UNIV
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