地面沉降对京津城际铁路工程稳定性影响的数值分析

地面沉降的快速发展对京津城际铁路的安全运行构成潜在威胁,特别是差异沉降较大的地段,对铁路桥梁及轨道稳定性产生较大影响。利用ABAQUS有限元,分析了局部抽水引起的地下水位下降和地面沉降对铁路桥梁桩基承载力和轨道混凝土支承层的影响,探讨了作用方式和影响程度,从而为制定高速铁路地面沉降防治工程措施提供技术依据。

A numerical analysis of the inlfuence of land subsidence on the engineering stability of the Beijing-Tianjin intercity railway

The occurrence of land subsidence constitutes a threat to the Beijing-Tianjin intercity railway. In particular, regions undergoing non-uniform subsidence can greatly affect the stability of both bridges and sections of rail. This paper uses the ifnite-element software ABAQUS to analysis the bearing capacity of railroad bridge piles and the inlfuence of rail concrete-supported beds under the conditions of a drop in the regional water-table level and subsidence caused by local pumping. The paper discusses the methods used and the computed stability of the rail structures with a view to preventing and/or remedying the engineering problems of the high-speed railway caused by land subsidence.