摘要
针对某体育馆双向不对称大悬挑钢桁架的施工技术进行了探索和实践,分析了该结构施工的技术难点,主要包括悬挑跨度大、结构高度高、卸载要求严、工期要求紧.通过技术难点分析,从支撑系统设计、钢桁架吊装、应力变形监测等几方面进行了重点介绍:支撑系统采用组合式格构钢支承柱和热轧H型钢以提供临时拼装平台;制定合理的吊装顺序以保证结构安全和稳定性;卸载过程采用手动螺旋千斤顶,按分步骤多次循环、微量下降的原则进行;对整个施工过程中主要构件进行监测,以保证施工过程的安全可靠.通过对该施工技术的系统分析,得出该施工技术应用于类似结构的可行性.
The construction technology for the bidirectional asymmetric large cantilevered steel truss of a gymnasi -um was discussed .The difficulties during the construction were analyzed , including the large span , the large height , the strict requirement and the tight schedule .Through analyzing the difficulties , the design of support system , steel truss lifting, stress and deformation monitoring were highlighted .The modular lattice steel columns and hot-rolled H-beams were used in the support system;the reasonable ceiling order was developed to ensure the safety and stability;the manual screw jack was used during uninstalling , obeying the principles that the procedure should be done by steps and multiple cycles and declined little by little;the deformation monitoring was done during the whole construction to ensure the safety and reliability .The feasibility of the construction techniques used in similar structures was concluded from the analysis of the construction technology .
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2015年第1期154-156,共3页
Journal of Xinyang Normal University(Natural Science Edition)
基金
河南省科技发展计划项目(112300410105
122400450336)
关键词
大悬挑钢桁架
施工技术
支撑系统
吊装
监测
large cantilevered steel truss
construction technology
support systems
lifting
monitoring
