Analytical algorithm for longitudinal deformation profile of a deep tunnel

作     者：Qian Fang Gan Wang Fucai Yu Jianming Du Qian Fang;Gan Wang;Fucai Yu;Jianming Du

作者机构：Key Laboratory of Urban Underground Engineering of Ministry of EducationBeijing Jiaotong UniversityBeijing100044China Beijing Academy of Safety Science and TechnologyBeijing101101China 

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：2021年第13卷第4期

页      面：845-854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：the financial support by the Key Project of High-speed Rail Joint Fund of National Natural Science Foundation of China(Grant No.U1934210) the Natural Science Foundation of Beijing,China(Grant No.8202037) 

主　　题：Deep tunnel Elastic solution Longitudinal deformation profile(LDP) Tunnel face Displacement 

摘      要：To investigate the longitudinal deformation profile(LDP)of a deep tunnel in non-hydrostatic condition,an analytical model is proposed in our *** this model,the problem is considered as a superposition of two partial models,and the displacement field of the second partial model is the same as that of the concerned ***,the problem can be solved by a model with simple boundary *** obtain the solutions for the stress and displacement fields of an infinite body caused by arbitrary surface tractions on the boundary of the coming tunnel(zone inside the tunnel before excavation)by integrating the extended Kelvin solution over the *** obtained stress solution is used to solve the specific surface tractions,which can satisfy the boundary conditions of the second partial model,on the boundary of the coming tunnel in an infinite ***,the specific surface tractions are substituted into the obtained displacement solution to solve the displacement on the wall and face of the ***,the LDP can also be *** proposed solution is verified by both numerical simulation and the LDP functions recommended by other *** major advantage of our analytical model is that it can consider the effects of the axial and horizontal lateral pressure *** is revealed that the horizontal lateral pressure coefficient majorly affects the LDP behind the tunnel face,while the axial lateral pressure coefficient dominates the LDP ahead of the tunnel ***,the deformation characteristics of the LDPs ahead of the face and the unexcavated core are *** axial displacements of the excavation face can be used to predict the crown displacements ahead of the face.