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Collapse Treatment of Faulted Karst Cave Tunnel

WANG Zheng-zheng;SUN Tie-cheng;ZHANG Sheng-lin;LI Bin;School of Civil Eengineering,Dalian University of Technology;School of Civil Eengineering,Shijiazhuang Tiedao University;Guizhou Bridge Construction Group Co. ,Ltd.;China Railway 13th Bureau Group Co. ,Ltd.;  
To aim at analyzing collapse of a tunnel during construciton in faulted karst cave,unfavorable geological condition,continuous rainstorm and inaccurate geological survey were discussed and according to in-situ survey,the method of advanced pipe with ductile grouting was put up,and applied to collapse treatment.Furthermore,monitoring and measurement of groupting zone was conducted during tunnel construction.The in-situ monitoring data show that the method of advanced pipe with ductile grouting is effective for temporary support requirements in tunnel collapse treatment.
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