Three-Dimensional Numerical Modeling of Ground Deformation during Shield Tunneling Considering Principal Stress Rotation

doi:10.1061/(ASCE)GM.1943-5622.0002048

	Three-Dimensional Numerical Modeling of Ground Deformation during Shield Tunneling Considering Principal Stress Rotation
	Ruan, Hang 1; Wang, Yuke 1,2; Wan, Yongshuai 2; Yu, Xiang 2; Zeng, Changnv 3; Shao, Jinggan 4
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2021-07-01
卷号	21 期号:7 页码:10
关键词	Principal stress rotation Shield tunneling Ground surface deformation Cohesive soil Numerical method
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0002048
英文摘要	In the process of tunnel excavation, the change of soil stress field will inevitably lead to principal stress axis rotation, which is a common but easily ignored phenomenon in shield tunneling. Therefore, it is necessary to consider the effect of principal stress rotation in the process of shield tunneling. In this paper, the stress field variation and ground surface deformation of cohesive soil are investigated by a numerical method via the strength parameter variation. A UMAT (user material) subroutine is programmed and embedding into the finite-element software to realize the strength parameter variation that is caused by the principal stress direction rotation during the whole tunneling process. The ground deformation considering the variation of the principal stress direction is compared with that when the variation of the principal stress direction is not considered. The simulation results show that the principal stress direction of the soil changes significantly during the tunnel excavation, and the principal stress direction of the soil within 1.5D (D = tunnel diameter) away from the tunnel axis and all the soil above the tunnel changes obviously. In addition, during the excavation, the rotation angle of the principal stress for each point in the soil gradually increases; in the direction perpendicular to the tunnel axis, the rotation angle of the principal stress increases first and then decreases from the tunnel axis to the edge of the model; when the direction of the principal stress changes, the strength parameters of the soil are modified, the ground deformation of which is larger than that before correction.
资助项目	National Key Research and Development Program of China[2019YFC1510803-2] ; National Natural Science Foundation of China[51639002] ; National Natural Science Foundation of China[51809034] ; National Natural Science Foundation of China[51708310] ; Key Projects of High Schools of Henan province[20A560021] ; China Postdoctoral Science Foundation[2019M662533] ; Open Research Fund of State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[Z017012]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000657451200009
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27477]
专题	中科院武汉岩土力学所
通讯作者	Wang, Yuke
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Zhengzhou Univ, Coll Water Conservancy Engn, Zhengzhou 450001, Peoples R China 3.Henan Univ Technol, Coll Civil Engn & Architecture, Zhengzhou 450001, Peoples R China 4.Henan Jiaoyuan Engn Technol Co Ltd, Zhengzhou 450001, Peoples R China
推荐引用方式 GB/T 7714	Ruan, Hang,Wang, Yuke,Wan, Yongshuai,et al. Three-Dimensional Numerical Modeling of Ground Deformation during Shield Tunneling Considering Principal Stress Rotation[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2021,21(7):10.
APA	Ruan, Hang,Wang, Yuke,Wan, Yongshuai,Yu, Xiang,Zeng, Changnv,&Shao, Jinggan.(2021).Three-Dimensional Numerical Modeling of Ground Deformation during Shield Tunneling Considering Principal Stress Rotation.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(7),10.
MLA	Ruan, Hang,et al."Three-Dimensional Numerical Modeling of Ground Deformation during Shield Tunneling Considering Principal Stress Rotation".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.7(2021):10.