深厚软土地区大面积堆载对铁路桥梁下部结构的影响分析

Influence of Large-area Loading on the Substructure of a Railway Bridge in Deep Soft Soil Areas

以福州可门港区大面积堆载造陆工程为背景，通过 FLAC3D 数值模拟，研究了深厚软土地区大面积堆载对既有铁路桥梁下部结构的影响。着重分析了不同地质条件与不同堆载距离，对桥梁桩基内力、桥梁墩台位移的影响。根据数值分析结果和相关规范，给出了确保铁路桥梁结构安全的堆载距离，可为可门港区填海造陆工程及其他类似工程提供参考。

Based on the reclamation project in Kemen Port of Fuzhou,the influence of large-area loading on the substruc-ture of the existing railway bridge is well studied through FLAC3D numerical simulations.The inner force of bridge pile foundation and the displacement of bridge pier are focused,according to different geological condition and different loading distance.On the basis of these numerical analysis results and the related standards,the safety distance between the filling and the bridge is proposed,which can provide references for the Kemen Port reclamation project and other similar projects.