湖北省科技馆新馆大跨度大悬挑结构高空拼装及支撑胎架设计技术

High Altitude Assembly and Supporting Bed-jig Design Technology for Large-span and Large-cantilever Structure of Hubei Science and Technology Museum New Hall

湖北省科技馆新馆为满足建筑内部大跨度、大空间的视野需求,主体采用核心筒-钢桁架-预应力拉索结构,最大悬挑长度45m,单层悬挑面积占单层建筑面积的60%,施工难度大。根据本工程大跨度、大悬挑结构特点,项目采用胎架支撑高空原位拼装法。通过综合考虑机械设备选型和构件安装顺序解决胎架布置的施工难题,通过施工全过程有限元仿真分析,完成合理的胎架结构设计,实现胎架高效利用。

In order to meet the requirement of large-span and large-space vision in Hubei Science and Technology Museum new hall, the structure of core tube-steel truss-prestressing cable is adopted, the maximum cantilever length is 45m , and the single-storey cantilever area accounts for 60% of the singlestorey building area. According to the characteristics of the large-span and large-cantilever structure of this project, the method of in-situ assembling of bed-jig support at high altitude is adopted in this project. Through the comprehensive consideration of the selection of mechanical equipment and the sequence of component installation, the construction problem of the bed-jig layout is solved. Through the finite element simulation analysis of the whole construction process, the reasonable design of the bed-jig structure is completed , and the efficient utilization of the bed-jig is realized.