Abstract:The South Extension Project of Ningbo Airport Road adopts Ultra-High-Performance Concrete (UHPC) as the wet joint of the small box beam. The steel bar is weld-free and the amount of concrete poured on site is greatly reduced, which effectively accelerates the construction speed and guarantees that the opening time of the Ningfeng rail transit line built at the same time can be on schedule, reduces the impacts of construction on the environment and traffic. In this paper, the experimental study of wet joints of bridge decks is carried out, the results show that the crack resistance and bearing capacity of the V-shaped joint are better than the grooved joint and the flat joint. Wetting interfaces and chiseling can significantly improve the bonding performance of the interface of UHPC and precast concrete. Through numerous application research of South Extension Project of Ningbo Airport Road, a complete set of technical requirements for the design, construction, testing and acceptance of UHPC precast assembled bridges has been formed, the application and development of new technologies of UHPC have been further promoted.
