某条形基础房屋的顶升纠倾加固技术  

Jacking Rectifi cation and Reinforcement Technology for a Strip Foundation Building

作　　者：周健男 戴占彪 刘辉 赵晓玉 ZHOU Jiannan;DAI Zhanbiao;LIU Hui;ZHAO Xiaoyu(Hebei Building Research Engineering Co.,Ltd.,Shijiazhuang,Hebei 050200,China)

机构地区：[1]河北建研科技有限公司,河北石家庄050200

出　　处：《建筑施工》2021年第1期105-108,共4页Building Construction

基　　金：河北省建设科技研究指导性计划项目(2020-208)。

摘　　要：以张家口地区某砌体结构住宅楼纠倾加固工程为例,根据工程地勘报告及附近环境,确定该楼发生倾斜的原因,制定了采用桩基托换技术对该楼进行顶升纠倾的设计方案。重点阐述了桩基托换技术的施工工艺及关键技术,并结合有限元对托换梁、既有砌体墙与基础之间的受力情况进行分析,结果表明托换体系可有效扩散千斤顶施加的集中应力,为顶升作业顺利完成提供了保障。该住宅楼经纠倾加固后,倾斜量由0.55%降至0.06%,满足规范要求,纠倾效果显著。Taking a masonry structure residential building in Zhangjiakou area as an example,according to the engineering geological survey report and the surrounding environment,the causes of the building's inclination were determined,and the design scheme of jacking rectification of the building's inclination by the pile foundation underpinning technology is formulated.This paper focuses on the construction technology and key technology of pile foundation underpinning technology,and combined with the finite element method analyzes the stress situation between the underpinning beams,the existing masonry wall and the foundation.The results show that the underpinning system can effectively diffuse the concentrated stress applied by the jacks,which provides a guarantee for the successful completion of jacking operation.After the rectification and reinforcement,the inclination amount of the residential building decreased from 0.55%to 0.06%,which met the requirements of the code,and the rectification effect was remarkable.

关 键 词：砌体结构 条形基础 顶升纠倾 桩基托换 数值模拟 

分 类 号：TU746.3[建筑科学—建筑技术科学]