大跨度机库整体提升施工关键问题研究  

RESEARCH ON THE KEY PROBLEMS IN THE OVERALL LIFTING CONSTRUCTION OF LARGE-SPAN HANGAR

作　　者：雷淑忠[1] 李沛萱 侯海涛 黄帅 刘之春 于瑞梁 LEI Shu-zhong;LI Pei-xuan;HOU Hai-tao;HUANG Shuai;LIU Zhi-chun;YU Rui-liang(School of Civil Engineering,Shandong Jianzhu University,250101,Jinan,China;China Construction First Bureau(Group)Co.,Ltd.,100161,Bejjing,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]中国建筑一局(集团)有限公司,北京100161

出　　处：《建筑技术》2024年第23期2937-2943,共7页Architecture Technology

摘　　要：某大跨度机库屋盖为网架-桁架混合结构,跨度大,自重大,施工复杂,拟采用液压整体提升方案进行施工。采用SAP2000对其整体提升过程进行仿真模拟,确定了合理的提升方案,优化了施工的预起拱方案,并对提升过程中的不同步工况的影响进行了综合分析。结果表明:整体一次提升和整体二次提升对结构完成后的应力和变形影响相差不大,从施工工期、难度和造价综合考虑,优选采用整体二次提升方案;机库结构的网架部分可以不起拱,桁架部分建议起拱,采用小立柱屋面找坡;整体提升时网架部分不同步位移限值不大于25 mm,桁架部分不同步位移限值不大于20 mm,为后续相似工程提供了不同步控制建议。The roof of a large-span hangar in Jinan is a composite structure of grid truss,with complex structure,large span,self-weight and complex construction.According to its structural characteristics,the roof structure adopts hydraulic overall lifting construction scheme to carry out construction operations.In this paper,SAP2000 is used to simulate the overall lifting process to determine the most reasonable construction scheme.The pre-arch scheme of construction is optimized,and the non-synchronous working conditions in the lifting process are comprehensively analyzed.The results show that the stiffness distribution of the truss part and the truss part of the hangar structure is uneven,and the displacement limits of the truss part and the truss part are different,the non-synchronous displacement limit of the truss part is less than 25 mm,and the non-synchronous displacement limit of the truss part is less than 30mm.This paper provides some suggestions on non-synchronous control for subsequent similar projects.

关 键 词：二次提升 预起拱 模拟分析 不同步提升 

分 类 号：TU758.15[建筑科学—建筑技术科学]