摘要
Abstract
Conventional foundation pit support structures generally adopt equal-length layout.For deep soft soil foundation pits,the support structure generally needs to penetrate the soft soil layer and enter the underlying hard soil layer,and the support structure is relatively long.The adoption of equal-length layout leads to very poor economy of the support.Combined with an example of a cantilever long-short combined support structure foundation pit under a typical deep soft soil geological condition,the internal force deformation and stability calculation of the support structure are considered separately.The long pile meets the stability requirements of the support structure,and the short pile and the long pile jointly meet the internal force deformation requirements of the support structure.When the embedded depth of the short pile reaches a certain level,increasing the length of the short pile has basically no effect on controlling the internal force deformation of the support structure,and then the length of the short pile is determined economically and reasonably.Finally,the finite element method is used for comparative analysis.The implementation effect of the project is good,and the deformation of the support structure is all within the allowable range of the specification.The research results provide a reference for similar projects.关键词
基坑工程/长短桩/深厚软土/悬臂支护结构Key words
foundation pit engineering/long-short piles/deep soft soil/cantilever support structure分类
建筑与水利
