佛山市地铁区间隧道下穿佛开高速桥施工对地表沉降影响的数值分析

Numerical Analysis of the Influence of Foshan Subway Tunnel Under the Buddha Open High Speed Bridge on the Ground Surface Settlement

为研究佛山地区地铁区间隧道下穿佛开高速桥施工对地表沉降的影响,以下穿佛开高速桥的佛山市地铁2号线莲塘站—张槎站区间隧道工程为背景,对下穿佛开高速桥段区间隧道进行了设计,并用MIDAS/GTS有限元软件对区间隧道下穿佛开高速桥进行有限元分析,研究了佛开高速桥建成前后初始地应力场变化规律,分析了区间隧道施工过程中对地表变形影响,并与Peck公式横向地表沉降规律进行对比研究,总结了盾构施工影响地层变形的规律,分析盾构施工影响地层变形的因素,提出了盾构掘进控制措施。

As the research area of Foshan subway tunnel under Fokai highway bridge construction on the influence of surface subsidence,the wear Fokai highway bridge of Foshan Metro Line 2 Liantang Railway Station to Zhangcha station tunnel project as the background,to wear under the Fokai bridge tunnel is designed,and using MIDAS/GTS finite element software for interval through the tunnel under the Fokai highway bridge is studied by finite element analysis,studied the Fokai bridge after the completion of the initial stress field variation,the deformation influence on surface tunnel construction process is analyzed,and the formula of Peck lateral surface subsidence law comparative study,summed up the shield construction ground deformation law,analysis of shield construction the influence factors of strata deformation in shield tunneling,put forward control measures.