预应力框架梁拆除及加固施工技术  

CONSTRUCTION TECHNIQUE FOR DISMANTLEMENT AND STRENGTHENING OF PRESTRESSED FRAME BEAM

作　　者：李峰 

机构地区：[1]南京市江宁区建设工程质量监督站,南京211100

出　　处：《建筑技术》2015年第10期873-878,共6页Architecture Technology

摘　　要：某大跨度预应力混凝土结构因漏设预应力筋导致个别预应力框架梁存在缺陷,经论证后实施了局部解体拆除及加固施工。经可靠性应力分析,对拆除梁周边区域梁板进行临时支撑,再采用机械切割结合人工凿除的方式对缺陷梁进行拆除,最后采取局部替换构件的方式进行加固,使其重新满足结构安全性及耐久性的要求。Defects are caused on individual frame beams of a wide-span prestressed concrete structure due to lack of prestressed reinforcement, and local dismantlement and strengthening techniques are adopted after discussion and verification. After analysis on reliability stress, temporary support is set for beam slabs around the beam to be dismantled, mechanical cutting and manual chiseling are adopted to dismantle the defective beam, and then local replacement of component is carried out to strengthen the structure and to satisfy the requirements for structural safety and endurability.

关 键 词：加固改造 预应力结构 框架梁 局部解体 

分 类 号：TU746[建筑科学—建筑技术科学]