体外预应力加固旧桥设计与施工方法研究

The Study on the Design and Construction Method of Reinforcing Old Bridge with External Prestress

体外预应力是一种近期效果十分明显的桥梁加固方法,受力途径明确,能够显著提高承载力和改善结构的应力状态。针对一种布筋方式,结合工程实例,提出了体外预应力加固旧桥的设计与施工方法,对原有混凝土结构进行加固补强、改造翻新,最大程度利用现有资源,保证其使用安全,延长其使用寿命具有一定的意义。

External prestress is an approach recently adopted in bridge reinforcement with obvious effect. With clear load bearing path, it can conspicuously enhance the load bearing capacity and improve the structure's stress condition. In light of one reinforcement approach, as well as combined with actual construction practice, this paper presents the design and construction method of reinforcing old bridge with external prestress. Through reinforcing and strengthening original concrete structure for remodeling and revamping, the current resources can be used to a maximum extent with significance on ensuring the safety and extending the life of the old bridge.