14 深埋长隧道TBM施工关键问题探讨_周建军.pdf

DOI:10.16285/j.rsm.2014.s2.049 35 2 Vol.35 Supp.2 2014 10 Rock and Soil Mechanics Oct. 2014 10598 (2014)2 0299 07 TBM 1, 2 1, 2 1. 450001 2. 471009 TBMTBM TBM TBM 3 TBM TBM TBM TBM TBMTBM U 452 A Discussion on key issues of TBM construction for long and deep tunnels ZHOU Jian-jun 1, 2, YANG Zhen-xing1, 2 (1. State Key Laboratory of Shield Machine and Boring Technology, China Railway Tunnel Group Co., Ltd., Zhengzhou 450001, China; 2. China Railway Tunnel Group Co., Ltd., Luoyang, Henan 471009, China) Abstract: Aiming at high water-pressure, great ground stress, high ground temperature, large deformation, difficult supporting and other problems in the construction of deep and long tunnels, the superiority and disadvantage of tunnel construction method are conducted, such as drill-blasting method, TBM method, and TBM bored pilot+enlarging method. TBM bored pilot+enlarging method provides a new idea for tunnelling design of deep and long tunnels. Due to the remarkable differences in geological condition between deep tunnels and shallow tunnels, there are three crucial problems for TBM construction, namely, rockburst, TBM jamming (large deformation), and construction accidents (water gush, mud burst, etc.) attributed to inaccurate geological prediction. In order to detect the occurrence of TBM jammi