Abstract:

In order to effectively reduce the construction risks caused by complex and unfavorable geological conditions, advance geological prediction for TBM construction is carried out systematically. Technologies, i.e. TRT7000, TSP203, advance geological drilling, microseismic monitoring, etc.〖ＫＧ－３〗, are comprehensively adopted. In combination with geological prospecting, ground geophysical prospecting and revealed surrounding rock features, accurate and effective judgment of adverse geology is realized. According to the actual geological conditions along the tunnel line, the optimized design for TBM equipment is carried out to improve the ability of TBM equipment to cope with disasters such as fault fracture zone, water gushing, large squeezing deformation and rockburst. And further more, advance pretreatment technology scheme for TBM construction disaster is put forward to reduce phenomenon of TBM jamming and avoid the risk of TBM burying.

Key words: deepburied tunnel, TBM, advance geological prediction, unfavorable geology, pretreatment technology