灰色系统理论在大跨斜拉桥合龙中的应用-港工技术.pdf

56 灰色系统理论在大跨斜拉桥合龙中的应用 王进军 1 ，张 凯 2 （1.中交二航局六公司，湖北 武汉 430014 ；2.天津市市政工程设计研究院，天津 300000 ） 摘要：河口黄河大桥属于兰州（新城）至永靖沿黄河快速通道的重难点控制工程，主桥采用主跨 360 m 的结合梁斜拉桥。以 河口黄河大桥为例，在-5 ℃的低温状态下，采用灰色系统理论对合龙时状态进行了分析，采用索力适当调整保证无应力长 度不变的自然低温合龙方案，代替了传统顶推合强制合龙方案，节省了工期。该方法可供类似工程参考。 关键词：结合梁；斜拉桥；灰色系统理论；强制合龙 中图分类号：U448.27 文献标识码：A 文章编号：1004-9592（2016）01-0056-03 DOI: 10.16403/j.cnki.ggj Application of Grey System Theory in Large Span Cable-stayed Bridges Beam Closure 1 2 Wang Jinjun , Zhang Kai (1.No.6 Engineering Co., Ltd. of CCCC Second Harbor Engineering Co., Ltd., Wuhan Hubei 430014, China; 2. Tianjin Municipal Engineering Design Research Institute, Tianjin 300000, China) Abstract: The estuary Yellow River bridge belongs to key and difficult engineering along the Yellow River fast track from Lanzhou (new city) to Yongjing, and its main bridge adopts the bond beam cable-stayed bridge with the main span 360 m. Taking estuary Yellow River bridge as an example, under - 5 ℃low temperature condition, grey system theory is used to analyze the closure error, and the cable force is used to appropriately adjust and ensure unstressed, natural and low temperature closure with constant length. This replaces the traditional pusher forced closure plan and saves the time for a project. This method can be used for reference in the similar projects. Key words: bond beam; cable-stayed bridge; grey system theory; closure 引 言 斜拉桥钢梁合龙是施工过程需要解决的关键 技术问题，温度、施工误差、不均衡荷载等因素都 河口黄河大桥是兰州（新城）至永靖沿黄河快 会对合龙口状态造成较大的影响，特别是钢结合梁 速通道的重难点控制工程，主桥采用主跨 360 m 的 对气温十分敏感。在经过多次方案研讨及理论分析 结合梁斜拉桥（见图 1 ），