温州市七都二桥总体方案研究

Research on Overall Scheme of Qidu Bridge II in Wenzhou

摘要:

七都岛作为温州国际未来科技岛的核心载体，其交通压力日益剧增，亟需谋划新通道以解决岛上的出行问题。从建设条件、纵断面控制因素等方面探讨建设的可行性；考虑慢行交通技术要求研究不同的接地方案；从景观定位论述主桥采用七跨连续中承式+上承式组合拱桥方案的合理性；考虑本桥特殊的交通功能，对比不同类型双层桥面结构形式，提出上层采用双边箱钢箱梁结构形式，下层采用钢桁架结构形式。该方案可为跨江市政桥梁设计提供参考。

Abstract:

Qidu Island, as the core carrier of the international science and technology island of Wenzhou in future, its traffic pressure is increasing rapidly. It is urgent to plan a new channel to solve the travel problem on the island. The feasibility of construction is discussed from the aspects of construction conditions, vertical section control factors and the others. For considering the technical requirements of slow traffic, the different grounding schemes are studied. Based on the landscape orientation, the rationality of the seven-span continuous half-through + deck composite arch bridge scheme for the main bridge is discussed. Considering the special traffic function of the bridge, the different types of double-deck bridge structure are compared. It is proposed to use the double-sided box girder structure for the upper deck and the steel truss structure for the lower deck. The scheme can provide reference for the design of municipal bridges across rivers.