Long tunnel fast construction process

A technology for long tunnels and construction techniques, applied in tunnels, tunnel linings, ventilation of mines/tunnels, etc., can solve the problems of long construction period, large investment in equipment, slow construction progress, etc., and achieve simple construction steps and proper connection arrangements , design reasonable effect

Active Publication Date: 2013-12-25
中铁二十局集团第二工程有限公司
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  • Abstract
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a rapid construction process for long tunnels in view of the deficiencies in the above-mentioned prior art, which has reasonable design, simple construction, safe and reliable construct

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  • Long tunnel fast construction process

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Embodiment Construction

[0075] like figure 1 Shown is a long tunnel rapid construction technology, the construction tunnel is a mountain tunnel with the cave body in the rock formation, the length of the construction tunnel is greater than 5km and its excavation section is greater than 100m2; the construction tunnel is divided into multiple sections from front to back. construction section, the construction section is a stable section of surrounding rock or a weak section of surrounding rock, the surrounding rock grade of the stable surrounding rock section is above grade III, and the surrounding rock grade of the weak surrounding rock section is grade V or grade IV , where the total length of all stable sections of surrounding rock accounts for more than 80% of the total length of the tunnel to be constructed, and the entrance and exit of the tunnel to be constructed are started at the same time and are constructed opposite to each other from the entrance and exit.

[0076] In actual construction, t...

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Abstract

The invention discloses a long tunnel fast construction process. The tunnel construction method in the direction from the entrance to the exit and the tunnel construction method in the direction from the exit to the entrance are the same and each construction section is respectively constructed from back to front. The construction process is as follows: 1, excavating construction at an initial construction section, the process is as follows: performing advance geology forecast, determining the excavating construction method for the current construction section, excavating and primary supporting; 2, excavating construction at the next construction section; 3, repeating the step 2 for multiple times until the construction tunnel is through, wherein in the tunnel construction process, found water seepage areas are timely subjected to draining treatment, and the secondary lining construction is synchronously performed on the tunnel holes formed by excavating from front to back. The long tunnel fast construction method is reasonable in design, simple and convenient in construction, safe in the construction process, short in construction process and fast in construction progress, thus effectively solving the defects and shortcomings such as large equipment investment, long construction period and slow construction progress of the existing long tunnel construction.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a rapid construction technology for long and long tunnels. Background technique [0002] The Nanguang Railway is a passenger-cargo railway with a design speed of 200 kilometers per hour, 250 kilometers are reserved, and the construction requirements reach 250 kilometers at a time. The Huapeiling Tunnel is one of the control projects of the Nanguang Railway. It is designed as a double-line large-section tunnel, which is divided into two-way excavation construction at the entrance and exit. It is designed without inclination and shafts. It is located at the junction of Guangdong and Guangxi provinces, crossing the two provinces The entrance is located in Dugou Village, Dapo Town, Cangwu County, Guangxi Province, and the exit is located in Gulong Village, Platform Town, Yunan County, Guangdong Province. The main vein of Peiling. The clearance width of Huape...

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Application Information

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IPC IPC(8): E21D9/00E21F1/00E21F16/02E21D9/12E21D11/10E21D11/00
Inventor 邵怀全苗文怀祝建周雷耀军袁昌生李玉洁万承茂田育虎仲维玲傅旋王群英高功林雷青川戴奇林党莹
Owner 中铁二十局集团第二工程有限公司
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