深基坑施工对原水管线影响的数值模拟研究

Numerical Simulation Study of the Impact of Deep Foundation Pit Construction on the Original Water Pipeline

为研究某地铁站深基坑施工对邻近原水管线的位移影响,采用MIDAS GTS建立原水管线-土-基坑三维有限元模型,通过数值模拟对比分析不采取预加固措施和采取预加固措施2个情况对原水管线的位移影响,通过模拟结果可知采取预加固措施可有效减小对原水管线的影响。通过后期施工实际监测原水管线沉降值发现,数值模拟较为准确,可为今后工程施工对原水管线的沉降影响提供参考。

In order to study the displacement impact of the deep foundation pit construction on the adjacent original water pipeline of a certain subway station,this paper uses MIDAS GTS to establish a three-dimensional finite element model of the original water pipeline plus soil plus deep foundation pit.By numerical simulation,the displacement impact of the original water pipeline under two scenarios,without pre-reinforcement measures and with pre-reinforcement measures,is compared and analyzed.The simulation results show that pre-reinforcement measures can effectively reduce the impact on the original water pipeline.Through the actual monitoring of the settlement value of the original water pipeline during the later construction period,the numerical simulation is relatively accurate and can provide reference for the settlement impact of future project construction on the original water pipeline.