某条形基础房屋的顶升纠倾加固技术

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...

Jacking Rectifi cation and Reinforcement Technology for a Strip Foundation Building

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.