水力发电2025，Vol.51Issue(5)：46-51,81,7.
盾构法双线隧道施工围岩变形数值模拟分析
Numerical Simulation Analysis of Surrounding Rock Deformation during Shield Tunneling Construction of Twin-line Tunnels
摘要
Abstract
To analyze the disturbances caused by the excavation of the rear tunnel on the front tunnel during the construction of twin-line tunnels using the shield tunneling method,Urumqi Metro Line 2 is taken as the research object,and the FLAC3D software is used to simulate and analyze the impact of the left line(rear excavation)on the right line(front excavation)from four aspects of surrounding rock deformation,stress distribution,plastic zone development,and segment structure stress.The results indicate that,(a)the excavation of twin-line tunnels significantly increases the deformation of surrounding rock,particularly in the arch crown and shoulder areas,with the excavation of the left line causing more pronounced disturbances to the surrounding rock of the right line;(b)the excavation leads to an increase in the range of stress disturbances in the surrounding rock,resulting in more significant stress redistribution after the excavation of the left line,thereby increasing the risk of deformation and failure of the surrounding rock;and(c)additionally,the excavation of twin-line tunnels exacerbates the expansion of plastic zone in surrounding rock,leading to severe damage to the rock mass around the support structure.It is recommended to optimize the construction sequence and enhance real-time monitoring to reduce the risk of surrounding rock failure.关键词
盾构法/双线隧道/施工扰动/围岩变形/数值模拟Key words
shield tunneling method/twin-line tunnel/construction disturbance/surrounding rock deformation/numerical simulation分类
土木建筑引用本文复制引用
张祖国,刘佳怡,孙淼军,谢良甫..盾构法双线隧道施工围岩变形数值模拟分析[J].水力发电,2025,51(5):46-51,81,7.基金项目
国家自然科学基金地区科学基金资助项目(52068-066) （52068-066）
