考虑桥面变形控制的换索技术研究

通过对四川德阳桥的工程概况以及换索原因的介绍，并针对有纵梁且纵梁刚度较大的中承式拱桥，用控制桥面变形的方式．解决用常规方法可能导致换索过程中桥梁产生过大内力的问题。该方法对桥面变形的控制较好，用临时支撑代替临时拉索．可实现在不需要安装临时拉索情况下对提篮拱桥进行换索施工，大大缩短了换索工期且降低了工程造价，对类似桥型的换索有所帮助。

Bridge Deck Technology Research for Cable Replacement in Consideration of Deformation Control

It introduces the project profile of the Sichuan Deyang Bridge and the reasons for bridge cable replacement. For the half-through arch bridge which has stringer and greater longitudinal stiffness, the excessive internal forces due to replacing arch bridge cable is overcome through conventional methods, and it＇s achieved by controlling deformation of bridge deck. The method of control deformation of bridge deck is better. Moreover, it can replace bridge cable of X-shaped arch bridge without installing temporary cables through temporary support instead of temporary cables, and shortens the construction period of bridge cable replacement and reduces project cost greatly. What＇s more, it＇s helpful to bridge cable replacement of similar bridge.