Collapse Treatment of Faulted Karst Cave Tunnel

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.