Factors Influencing Ground Settlement during Tunnel Proximity Construction

Xun Yuan, Hongchao Wang, Shun Kang (), Changwu Liu, Yulin Chen, Xianliang Zhou, Chengzhe Wu, Haowei Zhu, Changyu Yang, Yong Zhu and Hua Wu
Additional contact information
Xun Yuan: China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
Hongchao Wang: China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
Shun Kang: School of Emergency Management, Xihua University, Chengdu 610039, China
Changwu Liu: College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
Yulin Chen: College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China
Xianliang Zhou: School of Emergency Management, Xihua University, Chengdu 610039, China
Chengzhe Wu: China Chengda Engineering Co., Ltd., Chengdu 610096, China
Haowei Zhu: Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu 610041, China
Changyu Yang: China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
Yong Zhu: China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
Hua Wu: China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Sustainability, 2023, vol. 15, issue 17, 1-19

Abstract: Adjacent tunnel excavation has an adverse impact on existing structures. Based on the engineering project of the Donghuashan Tunnel under-crossing an existing tunnel, this paper designed 25 sets of orthogonal numerical simulation tests to investigate the influential mechanisms of five parameters on ground displacement and deformation. The influential factors are skew angle ( α ), proximity distance ( l ), buried depth ( h ), clearance ( D ), and ratio of tunnel clearances ( ν ). The orthogonal test results revealed that (1) the new tunnel clearance is the main impact factor of both ground settlement and curvature deformation, (2) ground horizontal movement is most significantly influenced by the skew angle between the existing tunnel and the new tunnel, and (3) the new tunnel buried depth is the key influential parameter for ground tilt deformation as well as horizontal deformation. The conclusions of this research suggest that during the period of railway planning, it is very important to plan the buried depths and spans of new tunnels rationally to minimize disturbance to existing tunnels.

Keywords: adjacent tunneling; under-crossing excavation; influential parameter; ground settlement; ground deformation (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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