金沙江某一大跨度钢结构桥梁快速安装技术措施

Technical Measures for Rapid Installation of A Long-span Steel Structure Bridge in Jinsha River

金沙江某电站上游一座开口式钢桁架结构桥梁,总长205.6m,钢结构总重达到921.86t。该桥梁在保证工程施工安全、质量以及“短、平、快”工期要求的前提下,采用平推法的快速安装措施,主桁架安装施工仅用40d时间完成,平均每天安装及平推达到5m,安装速度在同行业内达到先进水平。该桥梁已成功实施,为电站建设提供了方便快捷的交通条件。运行至今,各项监测结果表明,桥梁稳定、安全,满足设计运行工况要求。

An open steel truss structure bridge in the upstream of a power station in Jinsha River is 205.6m in length and 921.86t in total weight of steel structure.The bridge is installed quickly by the horizontal pushing method on the premise of ensuring construction safety,quality and construction period.Installation and construction of main truss only takes 40 days,with average daily installation and pushing up to 5 m,and installation speed reaches advanced level in the same industry.The bridge has been successfully implemented,providing convenient and fast traffic conditions for power station construction.Up to now,various monitoring results show that the bridge is stable and safe,and meets the requirements of design and operation conditions.