摘要
为减小基坑开挖对既有地铁隧道的影响,以某邻近济南地铁2号线的基坑工程为例,通过数值模拟分析,研究了基坑分层开挖、分段开挖和分层分幅开挖3种工序对隧道隆起变形的影响,通过数值模拟及现场实践验证,基坑分层分幅开挖施工工序对隧道变形和轴力影响最小。
In order to mitigate the impact of foundation pit excavation on existing tunnels,a case study was conducted on a foundation pit adjacent to the Jinan Metro Line 2.Through numerical simulation analysis,the influence of three excavation processes(layer-by-layer,section-by-section,and combined layer-section)on tunnel ver-tical displacement was systematically investigated.Comparative analysis demonstrated that the layer-section excavation method exhibited the least impact on tunnel deformation and axial force,validated by both numeri-cal simulation and field monitoring data.
作者
郭继杰
张潇丽
李大勇
顾永财
GUO Jijie;ZHANG Xiaoli;LI Dayong;GU Yongcai(Jinan Rail Transit Group Co.Ltd.,Jinan 250014,China;China Railway Sixth Survey and Design Institute Group Co.Ltd.,Tianjin 300308,China)
出处
《天津建设科技》
2025年第3期22-27,共6页
Tianjin Construction Science and Technology
关键词
基坑
隧道
开挖卸载
施工工序
foundation pit
tunnel
excavation and unloading
construction process
