超高层伸臂桁架梁柱安装施工技术研究

Research on the Construction Technology of Beam Column Installation of Super High-rise Extension Truss

目前国内超高层建筑通常采用框架—剪力墙结构形式,且框架结构一般使用型钢梁进行连接,形成较为稳定的受力体系.西北地区某超高层项目,采用框架—核心筒混合结构体系,外框架由H型钢梁和型钢混凝土柱构成,结合避难层设置两道伸臂桁架—环桁架,楼板采用钢筋桁架楼承板、现浇混凝土结构.为了提高施工效率,避免重复用工,保证施工安全和伸臂桁架安装质量,通过应用BIM技术模拟优化梁柱节点位置、改善作业空间、避免焊缝重叠出现等施工技术,较好地降低了施工成本、提高了吊装效率、缩短了工期,并有效降低了吊装作业风险,为其他类似钢结构工程施工提供了参考和借鉴.

Currently,the domestic super high-rise buildings usually use the frame-shear wall structure form,and the frame structure generally uses steel beams to connect,forming a relatively stable force system.A super high-rise project in northwest China uses a composite structure system with frame and core tube,the outer frame is composed of H-type steel beams and steel concrete columns,and two extension trusses-ring trusses are set in combination with the shelter layer.The floor adopts the reinforced truss floor bearing plate and cast-in-place concrete structure.In order to improve the construction efficiency,avoid duplication of labor,and ensure construction safety and the installation quality of extension truss,BIM Technology is applied to simulate and optimize the position of beam column nodes,improve the working space and avoid the overlapping of welding seams and other construction technical measures,which can well reduce the construction cost,improve the hoisting efficiency,shorten the construction period,and effectively reduce the risk of hoisting operation.It provides reference for other similar steel structure engineering construction.