Face stability of shield tunnels considering a kinematically admissible velocity field of soil arching

作     者：Wei Li Chengping Zhang Dingli Zhang Zijian Ye Zhibiao Tan Wei Li;Chengping Zhang;Dingli Zhang;Zijian Ye;Zhibiao Tan

作者机构：Key Laboratory for Urban Underground Engineering of the Ministry of EducationBeijing Jiaotong UniversityBeijing100044China School of Civil EngineeringBeijing Jiaotong UniversityBeijing100044China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2022年第14卷第2期

页      面：505-526页

核心收录：

学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程] 

基　　金：financial support provided by the National Natural Science Foundation of China(Grant No.51978042) 

主　　题：Tunnel face stability Velocity field Failure pattern Improved failure mechanism Critical face pressure 

摘      要：Existing mechanism of simulating soil movement at tunnel face is generally based on the translational or rotational velocity field,which is,to some extent,different from the real soil movement in the arching *** simulations are carried out first to investigate the characteristics of the velocity distribution at tunnel face and above tunnel *** a new kinematically admissible velocity field is proposed to improve the description of the soil movement according to the results of the numerical *** on the proposed velocity field,an improved failure mechanism is constructed adopting the spatial discretization technique,which takes into account soil arching effect and plastic deformation within soil ***,the critical face pressure and the proposed mechanism are compared with the results of the numerical simulation,existing analytical studies and experimental tests to verify the accuracy and improvement of the presented *** proposed mechanism can serve as an alternative approach for the face stability analysis.