某深基坑及建筑施工对邻近虎门高铁站的影响分析

Analysis of the Influence of Deep Foundation Pit and Building Construction on Nearby Humen High-Speed Railway Station

以广深港高铁虎门站特大桥旁某TOD项目为背景,介绍了该项目基坑设计的重难点问题,并给出相应的解决方案。同时利用三维有限元软件模拟深基坑及建筑施工对临近既有高铁桥墩的影响,计算出各施工工况下的高铁桥墩的变形数值,并进行对比分析。分析结果表明:桥墩的变形满足铁路相关规范的要求。实际施工监测数据与数值模拟结果相符,证明该安全评估方法真实有效,模拟结果既可作为基坑设计依据又可指导施工及位移监测,从而保证铁路的运营安全。

Based on a deep foundation pit project nearby Humen High-speed Railway Station of Guangzhou-Shenzhen-Hong Kong High-speed Railway,this paper introduces the key and difficult problems of the foundation pit design,and the corres-ponding solutions are given.At the same time,this article simulates the influence of deep foundation pit construction on adjacent high-speed rail-way piers by using three-dimensional finite element software,calculates the deformation values ofhigh-speed railway piers under various construction conditions,and makes a comparative analysis.The results show that the deformation ofbridge pier meets the relevant requirements of high-speed railway.The actual construction monitoring data is consistent with the numerical simulation results,which proves that the safety evaluation method is true and effective,and the simulation results can serve as the foundation pit design basis and guide the construction and displacement monitoring,so as to ensure the safetyofrailway operation.