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针对杭州铁路南站站房屋盖上跨运营线路时的拼装跨度大、结构复杂、施工“天窗”期短等特点,经综合考虑,决定采用分单元滑移拼装技术进行站房屋盖钢桁架的拼装施工。在滑移过程中,对分单元桁架进行动态监测,通过计算机同步控制及监测,对钢桁架施加顶推力,同步控制所有滑移轨道上滑靴的前进,消除了不同步性带来的屋盖桁架变形。同时通过“千斤顶+钢垫板”的组合,完成单元桁架的落位安装、固定,降低了落位过程中的不均匀变形对钢桁架的影响。经实践,施工取得了较好的社会和经济效益。
According to the characteristics of large span, complicated structure and short construction period of the roof of Hangzhou South Railway Station when it covers the cross-operating lines, after considering the comprehensive consideration, it is decided to adopt the sub-unit slip assembly technology to carry out the steel truss The construction of the assembly. During the slipping process, the subunit truss was dynamically monitored. Through the computer synchronization control and monitoring, a thrust force was applied to the steel truss to control the advancement of all the sliding shoes on the sliding track synchronously, eliminating the unsynchronized roofing Truss deformation. At the same time through the “jack + steel plate ” combination, to complete the unit truss fall installation, fixed, reducing the uneven deformation of the process of falling steel truss. After practice, the construction has achieved good social and economic benefits.