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大跨圆拱钢结构施工方案一般是高空原位散拼、地面分段拼装高空组装,但在既无法安装塔式起重机,场地又极为复杂的情况下,以上方案都不能实施。成都新世纪环球中心入口门厅圆拱桁架钢结构工程采用高空液压同步累积滑移技术,即就近地面分段拼装,高空组装,组装完成一榀桁架滑移一次,直至施工完成。结果表明,该方案不但安装速度快,大大减少高空作业,而且由于减少了大量的支撑架,还节省了施工费用。
Large-span circular arch steel construction program is generally high-altitude scattered scattered in place, the ground assembled assembled at high altitude, but in neither the installation of tower cranes, the venue is extremely complex circumstances, the above programs can not be implemented. Chengdu New Century Global Center entrance hall round arch truss steel structure using high-altitude hydraulic cumulative cumulative slip technology that is assembled near the ground segment, high-altitude assembly, the completion of a truss assembly slip once, until the construction is completed. The results show that the solution not only has the advantages of quick installation, greatly reduced height work but also saved construction cost due to the large reduction of the support frame.