聊城市徒骇河超宽自锚式悬索桥设计

A Design of Tuhai River Extra-wide Self-anchored Suspension Bridge in Liaocheng

徒骇河大桥是一座自锚式悬索桥。主梁采用超宽预应力混凝土结构,建成后宽幅居同类桥型之首。自锚式悬索桥最大的特点是主缆直接锚固在加劲梁的两端,由加劲梁直接承受主缆的水平拉力和锚固点主缆的竖向力,在加劲梁的水平方向形成自平衡体系。重点介绍徒骇河大桥的主要设计特点及主体结构的施工方法,并对设计中遇到的一些关键性问题进行较系统的研究,以利于该桥型的进一步发展。

Tuhai River Bridge is designed as a self-anchored suspension bridge.The main beam is adopting extra-wide prestressed concrete structure which will be the widest one of similar bridge type in China.The most characteristic of self-anchored suspension bridge is the main cable anchored itself on the stiffening girder directly;the stiffening girder bears the horizontal force and vertical force of the main cable anchorage point directly;and the formation of self-balancing system in the horizontal direction of the stiffening girder.The main design features of Tuhai River Bridge and the construction process of its main structure are emphasized,and moreover,systematic researches for some crucial problems in its design are made,which will be helpful to the further development of this bridge type.