S32高速公路上海段跨大蒸港矮塔斜拉桥设计

S32申嘉湖高速公路上海段跨越大蒸港处主桥为矮塔斜拉桥,主跨165 m。该桥设计为塔梁固结、墩梁分离的结构型式。斜拉索为单索面,主梁为预应力混凝土单箱五室,主塔为钢-混组合结构,桥梁全宽34 m。拉索为平行钢丝斜拉索、冷铸锚,主塔锚固区采用钢锚箱的锚固方式。主桥位于曲线半径R=3 000 m的平曲线范围内,对主塔的设计提出了新的挑战

Design of Low-pylon Cable-stayed Bridge Crossing over Dazhenggang River in Shanghai Section of S32 Expressway

The main bridge crossing over Dazhenggang River in Shanghai Section of S32 Expressway is a low-pylon cable-stayed bridge. Its main span is 165 m long. The bridge is designed as the structural type of pylon girder consolidation and pier girder separation. The stayed cable is in the type of single plane. The main girder is the pre-stressed concrete single-box five-cell structure. The main pylon is the steel-concrete combined structure. The total width of bridge is 34 m. The cable is the parallel steel wire stayed cable coldly casted anchored. The anchoring mode of steel anchor box is used in the anchorage zone of the main pylon. The main bridge is located in the range of horizontal curve with the curve radius 3000m, which puts forward the new challenges for the design of the main pylon.