深基坑支撑立柱竖向位移的简化计算及立柱加固应对措施  

Simplified Calculation of Vertical Displacement of Foundation Pit Support Column and Countermeasures for Column Reinforcement

作　　者：韦巡洲 谢晟 古志文 WEI Xunzhou;XIE Sheng;GU Zhiwen(Geological Construction Engineering Group Corporation of Guangdong Province Guangzhou 510080,China)

机构地区：[1]广东省地质建设工程勘察院,广州510080

出　　处：《广东土木与建筑》2025年第3期43-47,共5页Guangdong Architecture Civil Engineering

摘　　要：基坑支护工程结构中支撑立柱的竖向位移对基坑内支撑结构体系的影响较大,现行规范中尚未明确立柱竖向位移计算的相关公式。文中通过工程实例,建立主要由基坑底地基土回弹变形量、立柱柱体压缩变形量、立柱桩桩身变形量所组成的立柱竖向位移简化计算模型;基于工程实例立柱竖向位移的计算结果与实测结果对比分析,提出本地区类似工程地基土回弹量计算经验系数的建议值;针对实际工程中因建筑结构调整或坑中坑后设计遇到的立柱加固问题,提出托换加强微型桩、增设剪刀型钢撑的加固方法。The vertical displacement of the supporting columns in the foundation pit support engineering structure has a significant impact on the supporting structure system within the foundation pit.The current specifications do not specify the relevant formulas for calculating the vertical displacement of the columns.Establishes a simplified calculation model for the vertical displacement of the columns,which is mainly composed of the rebound deformation of the foundation soil at the bottom of the foundation pit,the compression deformation of the column body,and the deformation of the column pile shaft,through engineering examples.Based on the comparison and analysis of the calculation results and measured results of the vertical displacement of the columns in engineering examples,proposes the recommended values of the empirical coefficients for calculating the rebound amount of the foundation soil in similar projects in this region.In view of the column reinforcement problems encountered in actual engineering due to building structure adjustment or post-pit design,proposes reinforcement methods such as underpinning and strengthening micro-piles and adding scissors-type steel braces.

关 键 词：深基坑 立柱 竖向位移 回弹变形量 

分 类 号：TU471[建筑科学—结构工程]