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通过比选,确定了斜拉桥组合主梁的安装工艺:无索区主梁支架采用竖向支架,且利用悬拼吊机从边跨穿越索塔安装其预制桥面板;中跨主梁使用悬拼吊机进行悬拼;边跨全部梁段采用“落地支架+桥式起重机”进行安装;中跨、边跨合龙均采用自然合龙工艺,并优化了边跨合龙前桥梁状态。还对安全技术措施、为达到监控目标而采取的措施进行了介绍。注意到了边跨支架与钢梁之间会发生相对位移,对可能会引起的质量、安全隐患采取了技术措施。
Through the comparison and selection, the installation process of the main girder of the cable-stayed bridge is determined: the vertical bracket is adopted for the girder supporter of the cable-stayed bridge and the prefabricated bridge deck is installed through the pylon from the side span by using the flying crane; Hanging overhead crane hanging suspension fight; edge span of all beams using “floor bracket + bridge crane ” for installation; mid-span, side cross-hang are used natural closure process, and optimize the cross-bridge cross-dragon status. Also introduced the measures for safety and technical measures to achieve the monitoring objectives. Noted that the relative displacement between the side span bracket and the steel beam takes technical measures to the possible quality and safety hidden danger.