体外预应力体系是一种新型的预应力施工工艺,在高架桥施工过程中不需注浆,进而简化了施工工序,提高了工程质量。研究的目的是力求通过工程的施工,摸索体外予应力施工工艺以及控制重点,为该工艺的推广提供技术储备。 External prestressing system is a new type of prestressed construction technology, which requires no grouting during viaduct construction, which simplifies the construction process and improves the quality of the project. The purpose of the study is to seek through the construction of the project, to explore the external prestressed construction technology and control of the key points for the promotion of the technology to provide technical reserves.