Numerical analysis on zone-divided deep excavation in soft clays using a new small strain elasto–plastic constitutive model

作     者：Afnan Younis Tanoli Bin Yan Yong-lin Xiong Guan-lin Ye Usama Khalid Zhong-hua Xu 

作者机构：Department of Civil EngineeringState Key Laboratory of Ocean Engineering and ShanghaiKey Laboratory for Digital Maintenance of Buildings and InfrastructureShanghai Jiao Tong UniversityShanghai 200240China Institute of Geotechnical EngineeringNingbo UniversityNingbo 315211China Department of Civil EngineeringKhwaja Fareed University of Engineering and Information TechnologyRahim Yar Khan 64200Pakistan East China Architectural Design&Research InstituteShanghai 200002China 

出 版 物：《Underground Space》 (地下空间（英文）)

年 卷 期：2022年第7卷第1期

页      面：19-36页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：support of the National Nature Science Foundation of China(Grant Nos.42072317 41727802)is gratefully acknowledged 

主　　题：Deep excavation Soft clays Small strain Elasto-plastic model Ground displacements Metro tunnels 

摘      要：Accurate prediction of displacements associated with deep excavations is essential to ensure safety and stability of the excavation and to prevent any damage and distress to the adjoining *** paper presents a numerical approach for prediction of ground displacements related to a zone-divided deep excavation construction executed in Shanghai soft clays based on a new elasto–plastic con-stitutive model(small-strain Shanghai model)that incorporates small strain *** model can describe the mechanical properties and structural and over-consolidated characteristics of natural *** model is implemented into a finite element analysis *** analysis on the deep excavation in Shanghai using zone-divided method is conducted.A comparison between monitored and simulated results of horizontal displacements along the diaphragm wall,the settlements in the surroundings,and the effects on the adjoin-ing metro tunnel due to excavation construction is carried *** attention is paid to the stiffness degradation of representative elements in the *** simulated displacements show a good agreement with the monitored ***,this study provides an integrated solution for predicting displacements related to deep excavation in soft clays.