超大深基坑桩锚支护结构变形规律研究
Study on Deformation Rule of Pile-anchor Support Structure in Super-large Deep Foundation Pit
王明芬 1吴远纪 1白显凤 1王伟1
作者信息
- 1. 威宁彝族回族苗族自治县农村公路养护中心,贵州 威宁 553100
- 折叠
摘要
文中以某深基坑项目为例,对超大深基坑支护设计方案进行分析,并利用现场监测数据分析桩顶水平位移和基坑外地下水位的变化规律.实践表明,随着基坑开挖深度增加,桩顶水平位移由初期较小幅度(<2 mm)逐渐增大至 2～17 mm,即开挖作业显著改变了土压力分布,导致桩顶位移显著增加.因此,施工过程中,应加强对基坑中部支护体系的变形监测.
Abstract
Taking a deep foundation pit project as an example,the paper analyzes the support design scheme of super deep foundation pit,and analyzes the changes of the horizontal displacement of pile top and the lower water level outside the foundation pit by using the field monitoring data.The practice shows that with the increase of excavation depth,the horizontal displacement of pile top gradually increases from a small am-plitude(<2 mm)in the initial stage to2～17 mm,which indicates that the excavation operation significantly changes the soil pressure distri-bution,resulting in a significant increase in pile top displacement.Therefore,the deformation monitoring of the central support system of foun-dation pit should be strengthened during construction.
关键词
深基坑/桩锚支护/桩顶水平位移/变形规律Key words
Deep foundation pit/Pile-anchor support/Horizontal displacement of pile top/Deformation rule引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据