Application of PBA Method for Tunnel Portal Excavation in Soft and Easysliding Strata of Waterrich Xigeda Formation

WANG Lichuan, LI Zhipeng, LIU Zhiqiang, WANG Xiaobing, LUO Rong, WU Jian,ZHAO Qiushi, KUANG Liang, YANG Bo

Tunnel Construction . 2019, (1): 139 -147 . DOI: 10.3973/j.issn.2096-4498.2019.01.018