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Rapid construction method of high-pressure water-rich fault zone of tunnel

A construction method and fault technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to reduce risks, reduce water pressure in front tunnels, and strengthen construction organization

Active Publication Date: 2012-05-23
CHINA RAILWAY 12TH BUREAU GRP
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  • Abstract
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Problems solved by technology

[0003] In order to solve the problems of different construction methods for tunnels in high-pressure water-rich fault zones under the guidance of traditional understanding, the present invention provides a rapid construction method for high-pressure water-rich fault zone tunnels

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  • Rapid construction method of high-pressure water-rich fault zone of tunnel
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  • Rapid construction method of high-pressure water-rich fault zone of tunnel

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Embodiment Construction

[0046] List the following engineering examples to further illustrate the construction method of the present invention

[0047] 1. Brief introduction of the project. The F11 fault of Qiyueshan Tunnel is exposed on the surface DK364+950~+180 segment, and it develops in the hard soluble rock dominated by T1j4 dolomite and the soft non-ferrous rock dominated by T2b1 calcareous shale and mudstone. The junction of soluble rocks, the tunnel range DK365+110~+340 is the main fault zone, with multi-phase, secondary structure development, complex lithological composition, loose cementation, broken rock mass, and deterioration of rock and soil properties due to saturated water .

[0048] The F11 fault is divided into the upper and lower wall broken rock mass contact zone and the core broken and weak zone, with well-developed structural fissures and strong water permeability; the middle core zone is dominated by soft materials similar to gravel-containing silty clay or gravel-like soil, sa...

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Abstract

The invention relates to the field of tunnel construction, in particular to a rapid construction method of a high-pressure water-rich fault zone of a tunnel, which solves a plurality of problems in the construction method of high-pressure water-rich fault zone tunnels under the guide of the traditional knowledge. A draining branch tunnel is additionally arranged between a main tunnel and a parallel heading, the water flow pressure of the hanging wall of a fault interface is reduced progressively, and a large amount of water is discharged from the main tunnel by adopting a guiding and non-clogging mode; when the water pressure of the main tunnel is reduced to 0.3-0.5MPa, an informationized tracking and accurate grouting method is used for grouting and reinforcing the main tunnel; and rapidly excavating and sealing technology is used for excavating the main tunnel and the parallel heading. The invention adopts the technology combining the water distribution and pressure reduction mode, the informationized tracking and accurate grouting method and the rapidly excavating and sealing technology for high-pressure water-rich shattered fault zones for the first time, breaks through the traditional concept that the water distribution and pressure reduction mode is opposite to the grouting and reinforcing construction method, solves the world-class problem of construction of the high-pressure water-rich fault zone of the tunnel, improves the construction progress and the construction efficiency, and ensures safe and rapid perforation of the tunnel.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a rapid construction method for high-pressure water-rich faults in tunnels. Background technique [0002] Today, with the development of engineering construction, tunnel construction technology in complex areas has been greatly improved. At present, the construction methods for tunnels in high-pressure water-rich fault zones mainly include energy release and pressure reduction method and curtain grouting reinforcement method. In actual construction, it is found that these two methods have different problems. The specific analysis is as follows: 1. Energy release and reduction Problems in the pressure method: (1) For the case where there are underground rivers and karst development below the fault surface, and there are wide joint fissure waters in the vertical joint fissures, and the surface above the tunnel is houses, roads and paddy fields, the release of energy and pressure ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/14E21D11/04E21D20/00
Inventor 商崇伦张梅董裕国赵西民宋津喜和万春祁玺剑张金柱徐家定王晋雄吴波邱文恒席继红武亮月骆文学兰福东
Owner CHINA RAILWAY 12TH BUREAU GRP
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