兰州大通河宏图桥双曲拱加固提载技术研究与实践

Study and Practice of Reinforcing Loading Technology for Double-curve Arch of Hongtu Bridge on Datong River of Lanzhou

该文在分析总结双曲拱桥结构特点的基础上,以大通河宏图桥的加固改造为例,对双曲拱桥的病害原因、加固技术和施工工艺进行研究,介绍了粘贴钢板、粘贴碳纤维布、改变腹拱结构、加强横系梁、改造桥面系等加固提载技术的综合应用和施工工艺。

On the basis of analyzing and summarizing the structural characteristic of the double-curve arch bridge,the article studies the disease cause,reinforcing technique and construction technology of the double-curve arch bridge by taking the reinforcing reconstruction of Hongtu Bridge on Datong River as a case,and introduces the comprehensive application and construction technology of the reinforcing and loading technology,i.e.to stick the steel sheet,to stick the carbon fiber cloth,to change the web arch structure,to strengthen cross tie beam and to reconstruct the deck system.