河渠高边坡开挖对邻近桥墩桩基的影响分析

Numerical Simulation of the Influence of Canal High Slope Excavation on Adjacent High-speed Railway Bridge Pile Foundation

在引江济淮菜子湖线C5标河渠工程施工中,河渠边坡开挖线距附近的某铁路特大桥桥墩桩基较近,采用MIDAS-GTS NX通用岩土有限元分析软件,构建了模拟输水河渠高边坡开挖施工的数值模型,基于该模型,分析了输水河渠高边坡开挖对邻近桥墩桩基的影响。分析结果表明,由开挖引起的边坡土体位移影响范围较小,对桥墩桩基产生的侧向水平位移微小,引江济淮菜子湖线C5标邻近该铁路桥处的边坡开挖施工及运行引起桥墩桩基的微小位移,不影响该桥的正常使用。

On the account of the short distance between excavation line of the canal slope and the high-speed railway bridge pile foundation encountered in C5 Tender of Caizi Lake Line in the project of leading Yangtze River to Huai River, the MIDAS-GTS NX general geotechnical FEM software was used for simulating the excavation of high slope in the canal for water conveyance, whose influence was discussed based on this numerical model. The calculation results show that the displacement of slope soil caused by excavation has a little influence on the range and the lateral horizontal displacement of the bridge pile foundation. The construction of the slope excavation near the bridge does not have a major impact on the pile foundation of the bridge nearby.