Dynamic Response Analysis on Stress and Displacement of the Shield Tunnel Structure and Soil Layer under Train-Induced Vibration in Xiamen Metro Line 6

Jiaqi Guo, Lexin Xu, Chong Xu (), Ruimin Chen and Jinhai Lin
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Jiaqi Guo: School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
Lexin Xu: School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China
Chong Xu: China Railway First Survey and Design Institute Group Co., Ltd., Xi’an 710043, China
Ruimin Chen: Zhongtian Construction Group Co., Ltd., Hangzhou 310002, China
Jinhai Lin: China Railway First Survey and Design Institute Group Co., Ltd., Xi’an 710043, China

Sustainability, 2022, vol. 14, issue 19, 1-21

Abstract: Tunnel engineering develops rapidly. To study the dynamic response of shield tunnel structure and its bottom soil layer caused by metro train operation, a three-dimensional finite-difference dynamic calculation method is used to establish a shield tunnel-soil layer coupling model based on the shield tunnel project of Maluan Central Station-Jimei Island Station of Xiamen Metro Line 6, and the dynamic response of tunnel structure and its bottom soil layer caused by metro train operation is calculated. The results show that: Under the action of train-induced vibration, the shield tunnel structure mainly bears compressive stress and generates compressive deformation. The dynamic response of tunnel structure represents a significant increasing trend with the enhancement of train-induced vibration load. Under the same load strength, dynamic response change amplitude of structure is not obvious with tunnel structural stiffness, stress is gradually increasing, and displacement is weakening. The deeper the soil depth at the bottom of the shield tunnel structure, the weaker the dynamic response of the soil layer. The stress response of the soil layer at the same depth is increasing with the train-induced vibration load improving, but the displacement response has a stage characteristic. The dynamic response of the soil layer at the same depth does not change obviously with the increase in shield tunnel structural stiffness, but the stress response gradually increases, and the displacement response becomes weak. In general, investigation of the dynamic response of the subway shield tunnel under train-induced vibration has important practical significance for maintaining the long-term safe operation of subway tunnels.

Keywords: tunneling engineering; shield tunnel; numerical simulation; dynamic response; train-induced vibration load (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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