平潭竹屿湖大桥初步设计方案比选探讨

Discussion on the Selection of Preliminary Design Scheme of Zhuyu Lake Bridge in Pingtan Comprehensive Experimental Area

方案比选在桥梁设计过程中是一项十分重要的工作。桥梁结构安全、功能舒适、成本经济、外型美观是进行方案比选的主要技术标准。文章结合平潭综合实验区竹屿湖大桥初步设计方案,对预应力混凝土拱形连续梁桥、V型墩-先简支后连续预制箱梁桥、变截面预应力混凝土连续箱梁桥三种方案分别从桥型、跨径布置、技术难度、景观效果、施工周期、后期养护、总投资等角度对平潭综合实验区竹屿湖大桥进行多方位探讨并提出推荐方案。

The comparison of the schemes is a very important task in the bridge design process.The safety,functional comfort,cost-effectiveness and aesthetic appearance of the bridge structure are the main technical standards for the comparison and selection of the scheme.By referring to the preliminary design scheme of Zhuyu Lake bridge in Pingtan Comprehensive Experimental Area,this paper made a multi-directional exploration on the schemes of prestressed concrete arch continuous girder bridge,simple supported-to-continuous prefabricated box girder bridge with V-shaped pier and prestressed concrete continuous box girder bridge with variable section,and put forward the recommended scheme according to the analysis results of bridge type,span arrangement,technical difficulty,landscape effect,construction period,post maintenance and total investment.