深基坑排桩-内支撑支护结构变形特征分析  

The Analysis of Deformation Characteristics in Deep Foundation Pits for Pile Row and Internal Support Structure

作　　者：王钊 张杨婕 WANG Zhao;ZHANG Yangjie(Anyang Water Resources Center,Anyang 455000,China)

机构地区：[1]安阳市水资源事务中心,河南安阳455000

出　　处：《河南水利与南水北调》2024年第5期50-51,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：深基坑开挖施工过程中对土体和支护结构产生扰动,导致基坑结构产生变形破坏。基于深基坑排桩-内支撑支护有限元数值分析模型,分析了支护结构变形与土体破坏特征,结果表明:随着基坑开挖深度的逐渐增加,围护桩水平位移和地表沉降量呈现逐渐增大趋势,内支撑施加对基坑变形控制效果显著,深基坑最大坑底隆起量处基坑底部中心线位置处,坑底隆起呈现中间高两端低的拱形变形特征,排桩-内支撑能够较好地控制基坑变形,支护方案具有合理性。During the excavation of deep foundation pit,the soil and supporting structure are disturbed,leading to deformation and structural damage of the foundation pit.Based on a finite element numerical analysis model of a deep foundation pit with row piles and inner bracing,the deformation and failure characteristics of the retaining structure are analyzed.The results indicate a gradual increase in the horizontal displacement and surface settlement of retaining piles.The influence of internal bracing on the deformation of deep foundation pit is significant,with the uplift at the bottom of the pit exhibiting arch-like deformation characteristics at both ends of the middle section.The arrangement of piles and internal braces effectively mitigates pit deformation,demonstrating a well-designed support scheme.

关 键 词：深基坑 支护结构 排桩-内支撑 数值模型 

分 类 号：TV52[水利工程—水利水电工程]