河道开挖和弃土堆载对邻近高速铁路桥梁的影响分析

Influence Analysis of River Excavation and Soil Heaping on the Adjacent High Speed Railway Bridge

以浙江省嘉兴市一高铁段邻近施工工程为背景,选取沿线3个典型断面建立数值分析模型,研究河道开挖、弃土堆载对桥墩和承台的竖向位移、横向位移的影响。研究结果表明:河道开挖施工和弃土堆载的影响范围受堆土尺寸影响明显,表现为堆土的高度和宽度越大,弃土堆载的影响范围越大;在堆土距桥墩最短距离不变的情况下,堆土宽度对桥墩位移的影响小于堆土高度;桥墩和承台的竖向位移、横向位移均随堆土距桥墩距离的增大而明显减小。

Taking the construction adjacent to high speed railw ay in Zhejiang,Jiaxing Province as researchbackground, three typical sections along the railw ay were selected to establish the numerical analysis model. Theinf luence of river excavation and soil heaping on the adjacent high speed railw ay bridge was studied in this paper .The results show that the inf luence scope of river excavation and soil heaping is obviously affected by the size of thesoil, which show s that the greater the height and width of the soil, the greater the inf luence scope. When the distancebetw een the soil and the pier remains the shortest distance, the inf luence of the width of the soil on the displacementof the pier is less than the height of the soil. With the increase of the distance betw een pier and soil, the verticaldisplacement and lateral displacement of pier and bearing platform decrease obviously.