小跨石拱桥实用加固改造方法探讨

摘要

基于乡、县道路上大量建造年代久远的小跨径石拱桥的病害调查分析,提出在拱背增设钢筋混凝土增强层+贫混凝土拱上填料的简便加固方法.结合实际加固工程,对该加固方法的构造细节、承载力计算方式及施工工艺进行探讨,其结果可为同类桥梁加固设计提供参考.%Based upon survey and analysis to diseases in large number of old small span stone arch bridges on village and county roads,the authors have suggested simple reinforcing method for adding steel reinforced concrete layer above arch and add packing on lean concrete arch.Integrated with reinforcement project practice,this paper discussed the construction details,bearing force calculation and construction process of this reinforcement.The results can be used as reference for similar bridge reinforcement design.