Tunnel information tracing accurate grouting method

A grouting and precise technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as thick reinforcement rings, long construction period, and large number of drilling holes, so as to reduce impact, high grouting efficiency, and reduce grouting The effect of size

Active Publication Date: 2010-09-15
CHINA RAILWAY 12TH BUREAU GRP
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Problems solved by technology

[0004] In order to solve the existing tunnel grouting using the traditional curtain grouting method, there are problems such as thick reinforcement circle, large number of drilling holes, long construction period, etc., and provides an accurate grouting method for tunnel information tracking

Method used

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  • Tunnel information tracing accurate grouting method

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Embodiment Construction

[0034] List the following engineering examples to further illustrate the grouting method of the present invention

[0035] 1. Project introduction. The total length of the Qiyueshan Tunnel is 10,528 meters, the maximum buried depth is 670 meters, and the height difference between the entrance and exit reaches 150 meters. The tunnel passes through the Qiyueshan anticline structure, passes through 15 faults, and 3 underground rivers. With an area of ​​743,000 square meters, the Qiyueshan Tunnel is a typical representative of mountainous railway tunnels in the current domestic railway construction. The risk and difficulty of karst development, high-pressure water inrush and mud inrush are rare in China, and it is praised as world-class by domestic tunnel experts and peers. The tunnel is mainly characterized by poor geological conditions and high engineering risks. Whether it can be safely and smoothly penetrated controls the construction safety and construction period of the entir...

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Abstract

The invention relates to the field of tunnel grouting, in particular to a tunnel information tracing accurate grouting method, which solves the problems of thick reinforcing ring, large number of drilled holes, long construction period and the like of the traditional curtain grouting method adopted in current tunnel grouting. The method comprises the processes of grout stopping wall building, arrangement of orifice tubes and grouting tubes, measurement of the water burst of a drill hole, packer test, hole arrangement, drilling operation and grouting, wherein the hole arrangement and the grouting are performed according to the sequence from an advance geological drill hole to other outer ring holes to an inner ring hole to a working surface stabilizing hole to an access hole to a pipe-shed hole; and steps such as advance big pipe-shed construction of a working chamber and working surface stabilization by using a glass fiber anchor rod are saved. In the invention, a break through is made in the conventional construction philosophy, grouting design and geological change are tightly combined together, a grouting mechanism of 'crack blocking, water reduction, surrounding rock fixation and stratum stabilization' is adopted, the grouting holes are reduced by 30 to 40 percent, grouting quality is improved, the safe and quick construction is guaranteed, major water burst and mud burst accidents are eliminated, and the environment is protected maximally.

Description

technical field [0001] The invention relates to the field of tunnel grouting, in particular to a tunnel information tracking grouting method. Background technique [0002] Today, with the development of engineering construction, the tunnel construction technology in complex areas has been greatly improved. As an effective construction method to deal with complex geology, advanced grouting of the full section of the tunnel is playing an increasingly important role in the construction of karst high-risk tunnels and high-pressure water-rich faults. In the actual application process, how to closely integrate the grouting design with the geology, rationally optimize, improve efficiency, and save investment has always been an important factor restricting its promotion and use. [0003] The traditional full-section advanced curtain grouting is water blocking from the inside to the outside, the design of the reinforcement circle is thick, the holes are arranged in the whole section,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38
Inventor 商崇伦董裕国张民庆孙国庆谢达文宋津喜霍玉华张金柱徐家定王晋雄赵西民席继红都强
Owner CHINA RAILWAY 12TH BUREAU GRP
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