ENGINEERING GEOLOGICAL ANALYSES ON 2·22 BLOCKAGE ACCIDENT IN TBM CONSTRUCTION OF Shanggongshan Tunnel
Song Tiantian1,Xiao Zhengxue1,Su Huayou1,Lu Xiaoxia2
(1College of Environment Engineering,Southwest University of Science and Technology, Mianyang 621010 China) (2Zhangjiuhe Project Department of CMC Company, Kunming 651500 China)
Abstract During the course of the TBM construction in Shanggongshan Tunnel,the TBM blockage occurs frequently. So the blockage has become the main control factor of the TBM construction. Base on the 2·22 blockage accident,engineering geological analyses are carried to search for the general rules of TBM blockage and countermeasures.