大跨度混凝土梁斜拉桥挂篮设计及安装技术

Design and Installation Technology of Hanging Basket for Long-Span Concrete Girder Cable-Stayed Bridge

准格尔黄河特大桥主桥为(160+440+160)m双塔双索面全漂浮体系混凝土梁斜拉桥,主梁宽为28.4 m双边箱预应力混凝土结构,采用前支点挂篮悬臂浇筑施工,最大悬浇节段重5800 kN。为了保证挂篮整体刚度,挂篮承载平台采用钢箱梁结构,为方便挂篮运输及安装,长大构件采取分段制作高强螺栓连接;挂篮采用“二次接长”技术减少高空支架搭设工程量;挂篮下放、行走、提升采用一键启动自动化同步控制技术,斜拉索索力转换装置、挂篮安装支架设计了一系列新工艺和创新技术。

The main bridge of Zhungeer Yellow River Super Major Bridge is a(160+440+160)m double tower double cable plane full floating system concrete grider cable-stayed bridge.The main beam is a 28.4m wide double box prestressed concrete structure.It was constructed by cantilever pouring with a front fulcrum hanging basket.The maximum weight of the cantilever pouring section is 5800 kN.To ensure the integral rigidity of the hanging basket,the hanging basket bearing platform adopted the steel box girder structure.The long and large components were connected by high-strength bolts made in sections to facilitate the transportation and installation of the hanging basket.The hanging basket adopted the“secondary lengthening”technology to reduce the quantities of high-altitude support erection;The one-click start automatic synchronous control technology was adopted for the lowering,walking,and lifting of the hanging basket.A series of new processes and innovative technologies are designed for the cable-stayed cable force conversion device and the hanging basket installation support.