随着我国桥梁建设的突飞猛进,占75%以上的预应力混凝土桥梁的预应力损失病害问题日益突出。本文通过对在役预应力混凝土桥梁预应力无损检测技术和局部破损检测技术现状的研究分析,指出当前在役预应力混凝土桥梁预应力检测技术存在的技术难点,提出采用部分区域局部破损检测和大范围无损检测相结合的方法提高对在役预应力混凝土桥梁持久应力的测试精度,并建议通过在预应力钢筋中埋设智能传感器对在役预应力混凝土桥梁的持久应力进行长期监测。 With the rapid development of the bridge construction in China, the problem of prestress loss and loss of prestressed concrete bridges accounting for more than 75% has become increasingly prominent. In this paper, the existing prestressed concrete bridge prestressed non-destructive testing technology and local damage detection technology research and analysis, pointed out that the current prestressed concrete bridge in-service pre-stress detection technology there are technical difficulties, the proposed regional partial damage detection and large Range non-destructive testing methods to improve the durability of prestressed concrete bridges in service testing accuracy, and proposed to prestressed reinforced by embedded intelligent sensors on-site prestressed concrete bridges for long-term monitoring of stress.