某宴会厅拆除柱托换改造工程关键技术研究  

Key Technologies Research of Underpinning Project by Removing Columns in a Banquet Hall

作　　者：邓婷 Deng Ting(Guangzhou Huate Structural Design Firm,510010,China)

机构地区：[1]广州华特建筑结构设计事务所,510010

出　　处：《特种结构》2024年第3期60-65,共6页Special Structures

摘　　要：结合实际工程案例,针对某宴会厅二层托换改造工程,分析了拆除柱前后对结构总体性能和原结构构件内力的影响,根据拆除后结构的受力特点和相关结构构件不满足要求的根本原因提出采用后张法预应力混凝土托换桁架整体加固的方法,同时讨论了托换改造加固施工阶段的施工顺序并进行了防倒塌分析,得出该加固方法安全可靠的同时可较大程度减小加固范围。Combined with practical engineering case,a two-story underpinning project in a banquet hall,the influence of the removing columns engineering on the overall performance of structure and the internal force of the original structural was analyzed..According to the stress characteristics of the structure removed columns and the root cause that the related structural members do not meet the requirements,the method of post-ten-sioned prestressed concrete underpinning truss overall reinforcement was proposed.At the same time,the con-struction sequence and anti-collapse analysis in the construction stage of underpinning transformation and rein-forcement were discussed.The results showed that the reinforcement method is safe and reliable,while the rein-forcement range of related structural members can be greatly reduced.

关 键 词：混凝土结构改造 托换工程 后张法预应力混凝土托换桁架 施工顺序 防倒塌分析 

分 类 号：TU375.5[建筑科学—结构工程]