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| Grouting Technology for Construction of Mountain Tunnel in High-pressure Water-rich Fault Fracture Zone |
| ZHANG Jian-ru |
| Project Management Department of ZD-Ⅰ Bid Section of Longyan-Xiamen Railway, China Railway Tunnel Group Co. Ltd., Longyan, Fujian 364000, China |
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Abstract Research purposes：The geological disaster of high-pressure water bursting easily happens in construction of mountain tunnel in fault fracture zone with complex lithology and rock crushing under condition of the sufficient groundwater recharge source and it seriously affects the safety and progress of the construction. In order to effectively predict and control the water-in rushing from the fracture zone and prevent the appearance of the water-bursting into the tunnel ,it is necessary to do the research on the characteristics of the fault fracture zone and treatment measures.
Research conclusions：Reasonable adoption of tunnel grouting method should depend on the surrounding rock conditions revealed by excavation along with the predicted results. For construction of the tunnel in high-pressure water-rich fault fracture zone, the advanced grouting should be used to reduce the penetration coefficient of the surrounding rocks and losing the underground water. After grouting, the inspection assessment should be made to the grouting effect by inspection hole.
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Received: 26 March 2010
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2010, Vol. 27 
