高层建筑全过程施工对临近既有隧道影响的数值模拟分析

Numerical Simulation Analysis of the Impact Caused by the Whole Process Construction of High-rise Building upon the Adjacent Tunnel

结合某高层建筑施工实际工程,运用Midas软件建立真三维数值模型,模拟高层建筑基坑分块、分层开挖卸载和建筑施工加载整个施工全过程对临近既有隧道的影响,通过隧道洞周收敛、隧道竖向位移、水平位移、变形曲率和衬砌产生的附加应力变化,对隧道安全进行评价。结果表明,计算结果与工程实际监测结果基本吻合,得出隧道处于安全工作状态的结论。

Combined with the actual project of high-rise building construction near the terminal of Jiaozhou Bay Tunnel in Qingdao,this paper utilizes Midas software to build real three-dimensional numerical model, modeling foundation excavation, which are divided into different areas and stratification,excavation unloading and building loading of high-rise building to analyze the influence on the adjacent tunnel,and evaluate the tunnel safety through the tunnel convergence,lateral displacement,longitudinal displacement,deformation curvature and the additional stress produced by lining. The results indicate that calculations and actual monitoring results of the engineering are basically consistent,which comes that the tunnel is in safety operating condition.