国道G325九江大桥重建工程方案比选

Scheme Comparison of Jiujiang Bridge Rebuilding Project of G325 National Highway

简要介绍国道325九江大桥原桥布置情况及被撞情况,并详细描述了新建九江大桥的总体设计原则和设计思路。针对新建九江大桥桥位所处的自然地理环境和原九江大桥剩余孔的位置,设计提出了独塔斜拉桥、连续T构和连续梁三种不同的桥型结构,根据三种桥型结构的特点提出6种具体的桥梁方案,并针对其中3个桥梁方案进行了深度的经济技术比选,最终确定独塔组合结构斜拉桥为本桥推荐方案。

This paper has not only briefly introduced the bridge arrangement and collision accident of the former G325 Jiujiang Bridge,but also described in detail the overall design principles and thoughts for rebuilding of Jiujiang Bridge.Based on its geographical environment and the positions of its residual piles,the cable-stayed bridge with single tower,continuous beam and continuous T-shaped rigid frame have been put forward in design.According to the three bridge configurations,six detailed bridge schemes have been presented,three of which have been compared carefully and deeply in terms of economy and technology.In the end,the cable-stayed bridge with single tower has been recommended finally.