砖烟囱安全等级评定与加固技术  

Safety Grade Assessment and Reinforcement Technology for Brick Chimney

作　　者：孙晓阳[1] SUN Xiaoyang(China Construction Eighth Engineering Division Co.,Ltd.General Contracting Co.,Shanghai 201204,China)

机构地区：[1]中国建筑第八工程局有限公司总承包公司,上海201204

出　　处：《施工技术》2021年第9期71-76,共6页Construction Technology

基　　金：住房和城乡建设部2019年科学技术计划:复杂山地环境大型园艺博览建筑景观群建造关键技术研究与应用(2019-K-068);中建股份科技研发课题(CSCEC-2020-Z-29)。

摘　　要：依托砖烟囱安全等级评定与加固改造工程,对地基基础、上部承重结构、材料强度、构件缺陷与损伤进行现场检测,并结合有限元软件计算结果对烟囱安全等级进行鉴定。根据鉴定与计算结果提出合理的加固方案,包括修复烟囱筒体裂缝及风化部位,对烟囱外侧进行防腐施工,在烟囱筒体外侧整体包覆60mm×8mm竖、环向钢箍带,在烟囱顶部增设1道压顶圈梁并浇筑100mm厚混凝土板。采取加固措施后确保了烟囱后期安全使用,延长了烟囱使用寿命,取得良好加固效果。Based on the safety grade evaluation and reinforcement and reconstruction project of brick chimney,the field detection of foundation,upper bearing structure,material strength,component defects and damage were carried out,and the safety grade of the chimney was identified combined with the calculation results of finite element software.According to the identification and calculation results,a reasonable reinforcement scheme is proposed,including repairing the cracks and weathering parts of the chimney body,anti-corrosion construction on the outer side of the chimney.The outer side of the chimney body is covered with 60 mm×8 mm vertical and circumferential steel hoops.A top ring beam is added at the top of the chimney and 100 mm thick concrete slab is poured.After the reinforcement measures were taken,the safe use of the chimney in the later period was ensured,the service life of the chimney was prolonged,and good reinforcement effect was achieved.

关 键 词：烟囱 安全性 稳定性 鉴定 加固 有限元分析 

分 类 号：TU746[建筑科学—建筑技术科学]