市政技术2025，Vol.43Issue(6)：141-147,7.DOI:10.19922/j.1009-7767.2025.06.141
黄土基坑斜-直组合支护性能数值分析
Numerical Analysis of the Performance of Inclined-Vertical Composite Support Systems for Loess Foundation Pits
摘要
Abstract
The inclined-vertical composite support systems has the advantages of green,environment friendly and good supporting effect,etc.,which has been applied in soft soil foundation pit projects.However,there is few stud-ies on the inclined-vertical composite support of loess foundation pit.The PLAXIS 3D finite element software is used to analyze the difference between the internal and external inclined-vertical composite support systems in control-ling the horizontal displacement of the foundation pit and the soil settlement outside the pit during the excavation of loess foundation pit.The influence of rainfall on the stability of the foundation pit is studied and compared with the performance of traditional cantilever support structures.The analysis results show that the inclined-vertical compos-ite support systems surpass the cantilevered vertical piles in both limiting horizontal displacement of the pit and re-ducing settlement of the external soil.The internal inclined-vertical composite arrangement delivers better perfor-mance than the external arrangement;In the composite systems,the inclined piles act as either internal struts or anchors,with the internal supporting better than the anchoring one;Rainfall significantly undermines the stability of collapsible loess foundation pits.Compared with the external composite system and the cantilevered vertical-pile support,the internal inclined-vertical composite support maintains superior stability.关键词
斜-直组合桩/黄土基坑/支护性能/数值分析Key words
inclined-vertical composite pile/loess foundation pit/support performance/numerical analysis分类
建筑与水利引用本文复制引用
罗龙平,曹卫平,赵敏..黄土基坑斜-直组合支护性能数值分析[J].市政技术,2025,43(6):141-147,7.基金项目
陕西省自然科学基础研究计划一般面上项目(2024JC-YBMS-299) （2024JC-YBMS-299）
