近海填土对既有桥梁桩基影响分析与建议

Analysis and Suggestion on Influence of Offshore Filling on Existing Bridge Pile Foundation

摘要:

随着沿海城市建设的发展，土地资源逐渐成为制约其城市发展的瓶颈。工程建设中常常出现由于地面填筑、堆载等施工导致邻近结构物桩基拉应力和位移过大的情况。结合沿海某人工岛填筑项目对桥桩影响为例，运用Midas GTS NX三维数值模拟方法分析了填土方向以及分层填土衔接顺序对桥梁桩基的影响，同时对比分析了填土对不同桥桩桩径的影响以及对桥墩采用不同保护措施后桥桩的影响，研究结果可以为类似工程设计施工提供参考。

Abstract:

With the development of coastal cities, the land resources have gradually become the bottleneck of restricting the urban development. In engineering construction, the excessive tensile stress and displacement of pile foundations of adjacent structures are often caused by ground filling and loading. Taking the influence of a coastal artificial island filling project on the bridge piles as an example, Midas GTS NX three-dimensional numerical simulation method is used to analyze the influence of the filling direction and the layered filling linking-up sequence on the bridge pile foundation. At the same time, the influences of filling on the different bridge pile diameters and on the bridge piles after the bridge piers with the different protective measures are compared and analyzed. The research results can provide reference for the design and construction of the similar projects.