垃圾焚烧发电厂烟气净化间钢结构屋盖累积滑移施工技术  

Cumulative Slipping Construction Technology of Steel Structure Roof for Flue Gas Purification Room in Waste Incineration Power Plant

作　　者：段劲松[1] 贺雄 刘震国[1] 赵强[1] 刘进 孙豪君 赵翔宇 DUAN Jinsong;HE Xiong;LIU Zhenguo;ZHAO Qiang;LIU Jin;SUN Haojun;ZHAO Xiangyu(Beijing Urban Construction Group Co.,Ltd.,Beijing 100088,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京城建集团有限责任公司,北京100088 [2]清华大学土木工程系,北京100084

出　　处：《施工技术（中英文）》2024年第20期94-100,共7页Construction Technology

基　　金：国家自然科学基金(52378164)。

摘　　要：由于垃圾焚烧发电厂具有跨度大、高度高、厂房内工艺设备先行安装且厂房结构滞后安装的特点,需采用高空整体滑移施工方案。以北京安定循环经济园垃圾焚烧发电厂项目为背景,采用MIDAS Gen软件模拟其烟气净化间钢结构屋盖累积滑移施工技术,提出3种施工方案,有效解决了原方案中部分构件挠度和应力超限问题。基础滑移方案为两轨道滑移方案,但存在滑移过程中屋盖变形过大、高应力构件较多问题;改进方案包括增设轨道滑移方案和加劲网架滑移方案。滑移模拟计算结果表明,采用两轨道滑移方案时,结构最大应力为711.78MPa、最大挠度为1 256.05mm,应力、挠度均超过限值;采用增设轨道滑移方案时,结构最大应力为133.73MPa、最大挠度为98.19mm;采用加劲网架滑移方案时,结构最大应力为186.52MPa、最大挠度为124.77mm。计算结果表明,改进方案提高了滑移过程中结构刚度,降低了应力幅值,是结构滑移的可选方案。Because the waste incineration power plant has the characteristics of large span,high height,first installation of process equipment in the plant and lagging installation of the plant structure,it is necessary to adopt the overall slipping construction scheme at high altitude.Based on the waste incineration power plant project of Beijing Anding Circular Economy Park,MIDAS Gen software was used to simulate the cumulative slipping construction technology of steel structure roof in flue gas purification room.Three construction schemes were proposed,which effectively solved the problem of deflection and stress overrun of some components in the original scheme.The basic slipping scheme is a two⁃track slipping scheme,but there are problems such as excessive roof deformation and many high⁃stress components during the slipping process.The improvement scheme includes adding track slipping scheme and stiffening grid slipping scheme.The results of slipping simulation show that the maximum stress of the structure is 711.78MPa and the maximum deflection is 1256.05mm when the two⁃track slipping scheme is adopted,and the stress and deflection exceed the limit value.When the adding track slipping scheme is adopted,the maximum stress of the structure is 133.73MPa and the maximum deflection is 98.19mm.When the stiffening grid slipping scheme is adopted,the maximum stress of the structure is 186.52MPa and the maximum deflection is 124.77mm.The calculation results show that the improved scheme improves the structural stiffness during the slipping process and reduces the stress amplitude.It is an alternative for structural slipping construction.

关 键 词：钢结构 屋盖 滑移 有限元分析 应力 挠度 施工技术 

分 类 号：TU758[建筑科学—建筑技术科学]