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混凝土独塔斜拉桥采用联塔分幅的结构型式在国内外均属少见。南仓道立交桥跨越铁路南仓编组站、铁路京山线、在建的京津城际铁路等重要铁路干线。受规划及建设条件限制,主桥采用联塔分幅的独塔4索面混凝土斜拉桥,用前支点挂篮悬浇施工。介绍了方案构思的特点、结构体系拟定、塔形方案比选及施工方案的选择。
Concrete single-pylon cable-stayed bridge with the tower structure of the pattern is rare at home and abroad. South Wharf Road Overpass Nankang Marshalling Station across the railway, the railway line Jingshan, Beijing-Tianjin inter-city railway under construction and other important railway lines. Subject to the planning and construction conditions, the main bridge adopts the tower with separate tower 4 cable-stayed concrete cable-stayed bridge, with the former fulcrum hanging cantilever construction. Introduced the characteristics of the concept of the program, the development of the structural system, the tower selection and comparison of construction options.