道路配套工程施工对运营地铁车站的影响分析

Analysis on the Infl uence of Road Supporting Engineering Construction on the Operating Subway Station

运营地铁保护区内施工要求高,地铁车站上方覆土浅,卸载对既有结构的影响明显。文章以上跨地铁的市政配套工程为例,通过有限元分析和抗浮验算,研究施工对既有地铁结构变形、抗浮稳定安全系数的影响。由计算结果可知,开挖卸载对结构竖向变形影响明显,压顶梁拆除对地铁结构抗浮稳定影响满足规范要求。数值模拟数据与监测数据对比,模拟结果与实际情况相吻合,可为类似工程提供一定的参考。

The construction requirements in the protected area of the operating subway are high,the soil covering above the subway station is shallow,and the influence of unloading on the existing structure is obvious.Taking the municipal supporting engineering across the subway as an example,this paper studies the influence of construction on the deformation and anti-floating stability safety factor of existing subway structure throughfinite element analysis and anti-floating checking calculation.From the calculation results,it can be seen that the excavation unloading has obvious influence on the vertical deformation of the structure,and the influence of the roof beam demolition on the anti-floating stability of the subway structure meets the requirements of the specification.The comparison between numerical simulation data and monitoring data shows that the simulation results are consistent with the actual situation,which can provide some reference for similar engineering.