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Tunnel water inrush prevention and treatment method

A water inrush and tunnel technology, which is applied in the field of water inrush disaster prevention and control in tunnels, can solve the problems of blindness, experience, and insecurity in disaster prevention and early warning

Inactive Publication Date: 2020-10-23
CHINA RAILWAY 16TH BUREAU GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, this traditional early warning of water inrush control is blind and empirical, so that there are unsafe factors in the actual use of the tunnel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] This embodiment provides a tunnel water inrush disaster prevention treatment method, including the following steps:

[0044] S1: Geological forecast of gushing area, including the following steps:

[0045] Use one or more of the seismic wave reflection method, infrared water detection, geological radar and conventional geological methods to detect the mountains within 30-100m in front of the construction site, and analyze the surrounding rock conditions in front of it combined with various detection data. Whether there is diving, water supply, water quality, water inflow, and water inrush pressure;

[0046] The water inflow in the unexcavated section is inferred from the measured water inflow in the excavated section of the main tunnel;

[0047] When the geophysical method is used to detect that there may be water gushing ahead, use a horizontal drilling rig to drill holes, and water gushing may occur before the detection;

[0048] S2: Construction of the seepage chan...

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Abstract

The invention discloses a tunnel water inrush prevention and treatment method. The method comprises the following steps of geological forecasting of water inrush areas; construction of water inrush channels; excavation of faults or water-rich sections; grouting, sealing and reinforcement; and treatment of water inrush and mud gushing positions. The tunnel water inrush prevention and treatment method provided by the invention can predict and forecast in advance, strengthen advanced support management, especially grouting management, block mud and water inrush channels, ensure that the consolidation and stone rate enhancement are first achieved, and excavation are then carried out after surrounding rock reinforcement and water permeability reduction, and ensure that the flow of water does not cause cracks to open as well as sidewalls and roof collapse, thereby ensuring the safe use of tunnels.

Description

technical field [0001] The invention relates to the technical field of tunnel water inrush construction, in particular to a tunnel water inrush disaster prevention and control method. Background technique [0002] Longnan Tunnel is a controllable and difficult project on the whole line. The total length of the tunnel is 10.24km, the maximum buried depth is 580m, and the minimum buried depth is 16m. 4 working areas and 5 working faces organize construction. The geological lithology is mainly composed of granite and sandstone, and a total of 11 faults are crossed. Among them, the DK99+500~+620 section is the F8 regional large fault fracture zone, with a length of 120m and a water pressure of 0.5MPa in the cave body. There are dangerous rocks in the cave body There are many risks such as rockfall, mud gushing, rock burst, high ground temperature, karst, shallow burial, surrounding rock instability and landslides, etc. The maximum water inflow is 18,000 cubic meters per day, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38E21F16/02E21F17/18
CPCE21D11/10E21D11/38E21F16/02E21F17/18
Inventor 马栋闫肃王武现黄立新李永刚冯义涛晋刘杰
Owner CHINA RAILWAY 16TH BUREAU GRP CO LTD
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