钢板桩基坑支护稳定性影响因素分析  

Analysis of Factors Affecting the Stability of Steel Sheet Pile Foundation Pit Support

作　　者：郭芳 宋国栋 GUO Fang;SONG Guodong(Guangdong Hydropower Planning&Design Institute Co.,Ltd.,,Guangzhou 510635,China)

机构地区：[1]广东省水利电力勘测设计研究院有限公司,广州510635

出　　处：《广东水利水电》2025年第3期85-89,共5页Guangdong Water Resources and Hydropower

摘　　要：以广东某引水工程输水管线明挖工程为背景,分析钢板桩基坑支护嵌固深度、横撑数量和位置等因素对钢板桩基坑支护稳定性的影响。结果表明:在嵌固深度方面,嵌固深度增加对基坑整体稳定性、抗倾覆稳定性和抗隆起稳定性均有较大提升,并对基坑抗隆起稳定性起决定性作用;此外,当采用放坡增加嵌固深度时,基坑抗隆起和抗倾覆稳定性均有显著提高;在横撑方面,随着横撑数量的增加,基坑的桩底抗倾覆稳定性和整体稳定性基本呈线性增长,而横撑位置深度的变化主要对基坑的抗踢脚破坏稳定性有较大影响。Taking the open excavation project of a water diversion project in Guangdong as the background,this paper analyzes the influence of factors such as the embedded depth of steel sheet pile foundation pit support,the number and position of horizontal supports,on the stability of deep foundation pit support.The results show that in terms of embedded depth,an increase in embedded depth significantly improves the overall stability,anti overturning stability,and anti uplift stability of the foundation pit,and plays a decisive role in the anti uplift stability of the foundation pit.In addition,when using sloping to increase the embedded depth,the stability of the foundation pit against uplift and overturning is significantly improved.In terms of horizontal support,as the number of horizontal supports increases,the anti overturning stability of the pile bottom and overall stability of the foundation pit show a linear growth trend.And the change in the depth of the horizontal brace position mainly has a significant impact on the stability of the foundation pit's anti kick failure.

关 键 词：钢板桩 嵌固深度 横撑 稳定性计算 

分 类 号：TU473.1[建筑科学—结构工程]