Method for grouting polymers for tunnel protection

A high polymer and tunnel technology, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effects of no disturbance in the lining, strong pertinence, and small additional loads

Inactive Publication Date: 2011-08-03
ZHENGZHOU URETEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polymer grouting technology is mainly used in foundation reinforcement and road maintenance of industrial and civil buildings. There are no relevant reports on polymer grouting protection technology in the country about the presence of dissolved cavities in tunnel surrounding rocks and cavities caused by tunnel collapse.

Method used

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  • Method for grouting polymers for tunnel protection
  • Method for grouting polymers for tunnel protection
  • Method for grouting polymers for tunnel protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] (1) According to the condition of the cavity 1 at the top of the tunnel and the condition of the tunnel lining structure 2, determine the tunnel section that needs protective treatment, such as figure 1 shown;

[0023] (2) Determine the thickness of the polymer buffer layer according to the size and height of the cavity 1 at the top of the tunnel, possible rockfall conditions, and the bearing capacity of the lining structure 2, such as figure 1 shown;

[0024] (3) Polymer grouting technology is used to directly inject high polymer material to the periphery of the lining structure 2 . The material expands rapidly after a chemical reaction to form a polymer buffer layer3, such as figure 2 shown.

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PUM

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Abstract

The invention discloses a method for grouting polymers for tunnel protection. According to the method, a polymer material is grouted to the periphery of the lining structure of a tunnel aiming at dissolved cavities existing in tunnel surrounding rock or cavities caused by collapse of a tunnel, and the polymer material expands rapidly after a reaction to form a polymer buffer layer in the cavity at the periphery of the lining structure, thereby preventing rocks above the tunnel from falling to impact the tunnel lining. The method has the advantages of strong pertinence, good controllability, no disturbance to the lining, rapidness in construction, simple process, high efficiency and the like. Therefore, the polymer material with light weight and good elasticity has been successfully applied in the tunnel engineering, and shows the huge economic and social benefits and wide application prospect.

Description

technical field [0001] The invention belongs to the tunnel protection technology, in particular to a high polymer grouting method for cavity protection caused by dissolved cavities in the surrounding rock of the tunnel or tunnel collapse. Background technique [0002] In recent years, as an important building with smooth line connections, tunnels have developed rapidly under the premise that the country has increased infrastructure construction such as roads and railways. Since the construction quality and operation management of tunnel engineering involve people's life and property safety, they are highly valued by relevant departments and widely concerned by the society. [0003] The tunnel is a concealed project, and often encounters rock formation planes, faults, fault fracture zones, fissures, and unfavorable geological bodies such as rich water, karst water, and fissure water in the fault zone. cavity, so that the tunnel often encounters rock fall during the excavatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00
Inventor 王复明钟燕辉张蓓郭成超许建强
Owner ZHENGZHOU URETEK TECH
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