铁路荷载对邻近桥梁桩基侧向力学特性影响分析

Influence Analysis on Lateral Mechanical Characteristics of Adjacent Bridge Pile Foundation under Railway Load

某铁路以路基形式在沙坪镇特大桥下穿川南城际铁路,两条铁路在穿越区域同期建设,为从设计源头消除路基形式铁路对穿越桥梁形式铁路的附加水平应力影响,基于有限元软件,在施工阶段和运营阶段下,对桥梁桩基的附加水平应力问题进行研究,并与理论计算结果进行对比分析。研究发现:铁路荷载对同一承台下的桩基影响存在差异,应力重分布与荷载作用位置、地形起伏情况密切相关,其研究成果对分析类似问题有一定参考价值。

A certain railway traverses the Southern Sichuan Intercity Railway under the Shaping Town Bridge in the form of a roadbed.The two railways were constructed in the crossing area at the same time.In order to eliminate the additional horizontal stress effect of the roadbed railway on the bridge type railway from the design source,based on the finite element software,in the construction and operation stages,the additional horizontal stress of the bridge pile foundation was studied.And compared with the theoretical calculation results,it was found that the influence of the railway load on the pile foundation under the same cap was different.The redistribution of stress is closely related to the position of the load and the terrain fluctuations,and its research results have certain reference value for the analysis of similar problems.