越东路跨曹娥江大桥方案比选研究

Comparison and Analysis on Scheme of Yuedong Road Bridge Spanning Cao’e River

摘要:

公路跨江特大桥梁通常是工程项目建设的控制性节点工程，而桥梁方案比选作为首要解决的技术问题，对工程造价、质量和安全有着深远的影响。现以越东路跨曹娥江大桥为例，结合水文、防洪评价、航道通航和地质等建设条件，对桥型、主梁、索塔、斜拉索和锚固方案进行多方案比选研究。最终采用钢混组合梁斜拉桥方案，索塔采用景观优美的水滴形状，斜拉索采用钢绞线斜拉索，索梁锚固采用锚箱式，索塔锚固采用钢锚梁。该方案整体刚度良好、行车舒适、施工工艺成熟、工期可控，不会对通航产生影响，投资估算费用低。

Abstract:

The highway cross-river super-large bridges are usually the key control node projects in engineering construction, and the comparison of bridge schemes is the primary technical issue to be addressed, which has a profound impact on the engineering cost, quality and safety. Taking Yuedong Road Bridge spanning Cao’e River as an example, and combined with the construction conditions of hydrology, flood control evaluation, waterway navigation and geology, the multiple schemes are compared and studied on bridge type, girder, cable pylon, stayed cable and anchoring. Finally, the scheme of steel-concrete composite beam cable-stayed bridge is adopted. The cable pylon is in the shape of a beautiful water droplet. The stayed cable is the steel strand stayed cable. The anchoring of the cable beam is in the anchor box type. And the steel anchor beam is used for the anchoring of the cable pylon. This scheme features the good overall rigidity, comfortable driving, mature construction techniques and controllable construction period. There is no impact on the navigation, and the estimated investment cost is low.