立交改扩建工程中桥梁改造技术的探索

Exploration on Bridge Reconstruction Technology in Interchange Reconstruction and Expansion Project

桥梁改造是城市快速路互通立交改扩建工程中的重点、难点问题。以常州市龙江路—长虹路立交改扩建工程为例,在桥梁改造设计中采用多项技术手段,例如对弧形箱梁拓宽改造进行多方案技术比选,得出最优结构方案;新老桥面纵向结构缝采用无缝伸缩缝;运用可视化设计手段等。上述技术手段在本工程中均得到成功应用,可为类似城市快速路互通立交改扩建工程中的桥梁改造设计提供参考。

Bridge reconstruction is the key and difficult problem in the reconstruction and expansion project of urban expressway interchange.Taking the reconstruction and expansion project of Longjiang Road-Changhong Road Interchange in Changzhou as an example,a number of technical means are adopted in the bridge reconstruction design,such as multi-scheme technical comparison and selection of arc box girder widening reconstruction,and the optimal structural scheme is obtained;The longitudinal structural joints of new and old bridge decks shall be seamless expansion joints;Using visual design means,etc.The above technical means have been successfully applied in the project,which provides a certain reference for the bridge reconstruction design in the reconstruction and expansion project of similar urban expressway interchange.