深基坑钢板桩支护结构变形分析及方案优化

Deformation Analysis and Scheme Optimization of Steel Sheet Pile Supporting Structure for Deep Foundation Pit

本文通过理论计算及数值模拟方法,研究襄阳东西轴线深基坑钢板桩支护的合理性,并优化钢板桩支护方案。文中通过FLAC3D建立了深基坑开挖及钢板桩支护模型,分析钢板桩的内力及变形规律,并将模拟结果与计算结果相对照,证明了数值分析的有效性,对比分析不同嵌固深度的钢板桩最大位移及最大弯矩,结果显示桩身最大弯矩均未达到桩身极限承载弯矩,桩顶最大位移在嵌固深度较小时接近极限值。随后结合经济分析结果,选用合理的支护方案。

This paper uses theoretical calculations and numerical simulation methods to study the rationality of steel sheet pile support for deep foundation pits on the east-west axis of Xiangyang,and optimize the steel sheet pile support scheme.In this paper,a deep foundation pit excavation and steel sheet pile support model is established through FLAC3D,the internal force and deformation laws of steel sheet piles are analyzed,and the simulation results are compared with the calculated results,which proves the validity of the numerical analysis and compares and analyzes different embedded depths.The maximum displacement and maximum bending moment of the steel sheet pile,the results show that the maximum bending moment of the pile body has not reached the ultimate bearing bending moment of the pile body,and the maximum displacement of the pile top is close to the limit value when the embedded depth is small.Then combined with the results of economic analysis,a reasonable support plan was selected.