超深基坑开挖段钻孔桩侧摩阻力消除隔离网施工技术研究
Construction Technology of Isolation Net for Eliminating Pile Side Friction Resistance in Deep Foundation Pit Excavation Segment
熊帮亮 1陈嘉帅1
作者信息
- 1. 江西省地质工程集团有限公司,江西 南昌 330029
- 折叠
摘要
针对深基坑开挖段桩侧摩阻力对工程桩承载力数据的影响,文中采用防止桩身混凝土外泄隔离网加超长钢护筒等组合装置,减少混凝土与孔壁的黏结,达到准确测试基坑开挖后钻孔桩承载力目的,给桩基设计和后期施工提供准确的设计和工艺参数.结合某深基坑试验场地,介绍了超深基坑开挖段钻孔桩侧摩阻力消除隔离网施工工艺流程及操作要点,着重阐述了隔离网的做法、超长钢护筒安装拔出的关键控制节点,可为解决类似工程相关技术问题提供参考借鉴.
Abstract
In order to reduce the influence of pile side friction resistance on the bearing capacity data of engineering piles in deep foundation pit excavation segment,the isolation net was used to prevent the leakage of concrete from the pile body,combined with the super-long steel cas-ing,etc.The combination device was used to reduce the adhesion between concrete and the pile wall,so as to achieve the goal of accurately testing the bearing capacity of the pile after foundation pit excavation,providing accurate design and processing parameters for pile foundation design and subsequent construction.Based on a deep foundation pit test site,this paper introduces the construction technology of isolation net for eliminating pile side friction resistance in deep foundation pit excavation segment,focusing on the construction techniques of isolation net and the key control nodes of super-long steel casing installation and pulling out,providing certain reference for similar engineering related tech-nical issues.
关键词
超深基坑/侧摩阻力/隔离网,承载力/超长钢护筒Key words
Deep foundation/Side Friction Resistance/Isolation net/Bearing capacity/Super-long steel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