随着交通运输业的不断发展,对公路桥梁的设计使用性能也提出了越来越高的要求,大多原有按老的规范标准设计施工的桥梁因负荷过大或出现裂缝等缺陷,普遍存在承载力不足的现象,已无法满足正常的交通需求。体外预应力加固桥梁结构是一种效果较好、使用较广的方法。为此,现简要介绍了桥梁体外预应力加固的常用方法,以供参考。 With the continuous development of the transportation industry, the design and performance of highway bridges have also put forward higher and higher requirements. Most of the bridges originally designed and constructed according to the old norms and standards are ubiquitous because of defects such as excessive load or cracks. The phenomenon of insufficient capacity has been unable to meet the normal traffic demand. External prestressed reinforcement of the bridge structure is a better, more widely used method. To this end, a brief introduction to the common external bridge prestressed reinforcement methods for reference.