持力层深度对单桩受力变形的影响分析

为研究桩基持力层深度影响单桩受力变形规律,以白山管理房桩基工程为例,根据工程地质条件建立数值计算模型,基于 FLAC3D 对不同桩基持力层、不同桩顶荷载条件下桩与桩周土的竖向位移和桩身竖向应力进行计算。结果表明:持力层越深,桩顶沉降越小,在不同荷载作用下桩顶所产生的差异沉降也越小,桩身最大竖向应力值越大，故采用较深桩基持力层能更好地解决白山管理房桩基沉降和差异沉降问题。

Analysis of the influence of bearing strata depth on the deformation of single pile under load

To investigate the influence of bearing strata depth on the deformation behavior of single piles, the case study of the Baishan Management Building foundation project is considered. A numerical computational model is established based on the engineering geological conditions. Using FLAC3D software, the vertical displacement of the pile and the vertical stress distribution along the pile shaft are calculated under different bearing strata depths and pile top load conditions. The results indicate that as the bearing strata depth increases, the settlement at the pile top decreases, and the differential settlement between piles under different load conditions also decreases. Additionally, the maximum vertical stress in the pile shaft increases with deeper bearing strata. Therefore, adopting a deeper bearing strata can better address the settlement and differential settlement issues in the Baishan Management Building foundation project.