高速铁路路基浅埋式桩板结构力学性能分析

Analysis of Mechanical Properties of Shallow Buried Pile-slab Structure in High-speed Railway Subgrade

依托广西在建高铁项目,运用数值模拟软件sap2000 v15,对桩板结构的变形特征和内力分布规律进行研究,对比分析影响变形和力学性能的主要因素,以达到优化目的。结果表明:承台板的弯矩分布及变形呈中心对称,剪力分布呈反中心对称;桩的弯矩极值和剪力极值均出现在桩顶位置,随深度增加而递减;板厚、边跨、桩间距等参数均对桩板结构的内力和变形有较大影响。

In relation to a high-speed railway project under construction in Guangxi, using numerical simulation software sap2000 v15, the deformation characteristics and internal force distribution of the pile-slab structure have been studied. The major factors that affect the deformation and mechanical properties of the pile-slab structure have been compared and analyzed to achieve the purpose of optimization. The results show that the distribution of bending moment and deformation of the cap plate is centrosymmetric, while the distribution of shear force is anticentrosymmetric. The extreme values of bending moment and shear force appear at the top of pile and decrease with the increase of pile depth. The parameters such as plate thickness, side span and pile spacing have great influence on the internal force and deformation of pile-plate structure.