大跨度混凝土拱桥关键施工技术及荷载试验

Key Construction Technology and Load Test of Long-Span Concrete Arch Bridge

针对两河口水电站1号临时桥主拱圈施工关键技术问题,根据现场施工条件及保证工期要求等,将桥梁主拱圈由原设计采用钢拱架整体现浇改为预制吊装施工方案,提出了1号临时桥的关键施工方法和工艺,解决了高海拔高寒地区混凝土拱桥施工的关键技术问题,1号临时桥荷载试验表明各项指标均在正常范围内,可为同类工程施工提供借鉴。

Aiming at solving the key technical problems in the construction of the main arch of the No.1 temporary bridge of the Lianghekou Hydropower Station,in accordance with the site condition and the construction period requirements,etc.,construction of the main arch has been changed from steel arch integral cast-in-place in the original design to precast hoisting.The key construction methods and specific techniques for construction of No.1 temporary bridge are proposed which solve the key technical problems of concrete arch bridge construction in high altitude and cold areas.The load test shows that the indexes of No.1 temporary bridge were within the normal range.This paper provides reference for the construction of similar projects.