复杂环境深大基坑支护结构有限元分析

Finite Element Analysis of Deep and Large Foundation Pit Support Structure in Complex Environment

文章以某深基坑为研究对象,采用大型有限元软件对基坑开挖、支护方案及施工进行了较为深入的研究。研究结果表明,该基坑支护结构有效地约束了坑底隆起,基坑外侧表面土体沉降呈凹陷型分布且沉降量均在预警值以下;桩身变形呈弓形分布特征,且随着开挖深度的增加,最大变形量不断下移。模拟结果可为同类基坑工程提供施工经验。

A deep foundation pit is taken as the research object,and the large-scale finite element software is used to study the excavation,support scheme and construction of the foundation pit.The research results show that the support structure of the foundation pit effectively restrains the uplift of the bottom of the foundation pit,and the settlement of the soil on the outer surface of the foundation pit is concave and the settlement amount is below the warning value;the deformation of the pile body is characterized by a bow-shaped distribution,and the maximum deformation continues to move down with the increase of excavation depth.The simulation results can provide construction experience for similar foundation pit engineering.