运营地铁上方箱涵施工数值模拟分析与实测研究

Numerical Simulation Analysis and Measured Study of Box Culvert Construction above Operating Subway

以苏州高铁新城民四南路箱涵工程为例,通过建立三维有限元模型分析了箱涵结构分段开挖、分序吊装的地表变形及地铁结构的变位,并与现场实测数据进行对比分析。结果表明实测数据与计算结果较为接近,分段施工各节段开挖及回填量少,对地铁结构的变形扰动影响较小,确保了下卧地铁结构安全,可为类似工程设计与施工提供借鉴和参考。

Taking the Suzhou High Speed Rail New City Minsi South Road Box Culvert Project as an example,a 3D finite element model is established to analyze the surface deformation of box culvert structure and the displacement of the subway by subsection excavation and sequential hoisting,and the contrastive analysis is carried out with the field measured data.The result shows that the measured data are more close to the calculation result.The excavation and backfilling of each segment in the subsection construction are little.And the influence of the deformation and disturbance on the subway structure is little,which ensures the safety of the underlying subway structure,and can provide reference for the design and construction of the similar projects.