异形钢独塔斜拉桥设计

Design of Special-shaped Steel Single-pylon Cable-stayed Bridge

洞口县平溪江大桥为主跨100 m的异形钢独塔斜拉桥,跨越洞口县平溪江。该桥为双索面,塔梁墩固结体系;主梁为两侧单箱单室P-K预应力混凝土混凝土箱形梁,桥梁全宽34.6 m。拉索为平行钢丝斜拉索,冷铸锚。主塔为异形钢箱结构,拉索通过钢锚箱锚固于主塔上。主跨跨越平溪江,采用悬臂浇筑法施工;锚跨位于岸上,采用现浇支架施工。

The Pingxi River Bridge in Dongkou County is a special-shaped steel single-pylon cable-stayed bridge with the main span 100 m across Pingxi River in Dongkou County.The bridge is a double-plane bridge with a pylon-beam-pier consolidation system.Its main beam is a single-box single-chamber P-K prestressed concrete box girder on both sides.The total width of the bridge is 34.6 m.The stayed cable is a parallel steel wire stayed cable with cold-cast anchor.The main pylon is a special-shaped steel box structure,and the cable is anchored to the main pylon through a steel anchor box.The main span spans the Pingxi River and is constructed by the cast-in-cantilever method.The anchor span is located on the shore and is constructed by cast-in-place support.