城市独柱墩桥梁抗倾覆加固改造设计探讨

Discussion on Design of Anti-overturning Reinforcement and Reconstruction of Urban Single-pier Bridge

摘要:

独柱墩桥梁具有结构轻巧、占地少等优点，被广泛应用在城市立交和高架上。近年来，独柱墩桥梁倾覆事故频繁发生，独柱墩桥梁结构的稳定性问题越来越受到桥梁管理者的重视。结合南京市独柱墩桥梁抗倾覆加固改造的工程实践，首先确定了独柱墩桥梁加固改造原则；然后，对不同桥型进行加固改造方案比选，优化抗倾覆加固设计；最后，对桥梁特征状态1和特征状态2情况下如何进行改造进行了总结。

Abstract:

Single-pier bridge has the light structure, less land occupation and other advantages, and is widely used in urban interchanges and viaducts. In recent years, the overturning accidents of single-pier bridges occur frequently. The bridge managers pay more and more attention to the stability problems of single-pier bridge structure. Combined with the engineering practices of the anti-overturning reinforcement and reconstruction of single-pier bridges in Nanjing, the reinforcement and reconstruction principles of single-pier bridge are firstly determined, then the reinforcement and reconstruction schemes of the different bridge types are compared, and the design of anti-overturning reinforcement is optimized, and finally, how to reconstruct the bridges under the conditions of feature state 1 and feature state 2 is summarized.