黄土深基坑内支撑体系分析及优化

Analysis and optimization of inner support system in loess deep foundation pit

基坑工程是城市建设中的重要部分。在基坑开挖过程中,地面土体受到破坏和变形,对围护结构产生一定的负荷作用,因此需要采取措施来增加围护结构的稳定性。本文以某隧道工程明挖段为例,对土体和钢支撑、围护桩等各部分之间的相互作用建立有限元模型,结合现场实测和数值模拟,研究钢支撑架设位置对围护桩水平位移的影响,并提出相应的优化设计方案,可为相关研究提供参考。

Foundation pit engineering is an important part of urban construction.During the excavation process,the ground soil undergoes damage and deformation,exerting a certain load effect on the enclosure structure.Therefore measures need to be taken to enhance the stability of enclosure structure.This paper took an open excavation section of a tunnel as an example to establish a finite element model for the interaction between soil mass,steel support,and retaining pile.Combined with field measurement and numerical simulation,the influence of erection position of steel support on the horizontal displacement of retaining pile was studied,and a corresponding optimization design scheme was proposed,providing reference for related research.