复杂工况下的桥梁拼宽构造研究

Research on Widening Construction of Bridge under Complex Working Conditions

随着社会经济的发展,城市交通拥堵现象日益加剧,对现有城市桥梁进行拼宽改造可极大缓解城市交通压力。然而,许多城市桥梁由于受到现有结构特殊性、新桥布跨特殊性等的限制,新老桥之间无法直接进行结构连接。因此,进一步开展新型拼接构造的研究十分必要。通过总结规拼桥的拼接方式,并依托实际工程,针对老桥挑臂承载能力不足且加固困难的问题,提出了一种用于复杂工况的桥梁拼宽构造,为相近拼宽桥梁结构的设计与施工提供参考。

With the development of social economy,the phenomenon of urban traffic congestion is becoming more and more serious.The widening reconstruction of the existing urban bridges can greatly relieve the pressure of urban traffic.However,due to the specificity of the existing structure and the span layout of new bridge,the structure connection between the old and new bridges cannot be made directly.Therefore,it is necessary to further study the new splicing constructions.The splicing methods of conventional spliced bridges are summarized.And based on the practical projects,aiming at the problems of the insufficient bearing capacity of the cantilever arm of old bridge and the dfficulty of reinforcement,a kind of structure used for the bridge widening under the complex working conditions is proposed,which can provide a reference for the design and construction of the similar bridge widening structures.