近年来,河北省高速公路出现了多起车辆撞击桥梁事件。车辆撞击使桥梁上部主要承重构件严重破损,个别预应力空心板的预应力钢束甚至被撞断多根,桥梁的安全运营受到了巨大的威胁。文章通过对一座被撞击桥梁的加固方案设计进行总结分析,对空心板预应力钢束部分断裂提出了几种加固方法。 In recent years, a number of vehicles hit the bridge on the highway in Hebei Province. The impact of the vehicle caused serious damage to the main load-bearing components in the upper part of the bridge. Even prestressed beams of individual prestressed hollow slabs were even severed and severely damaged. Therefore, the safe operation of the bridge was greatly threatened. In this paper, by summarizing and analyzing the design of reinforcement plan of a struck bridge, some reinforcement methods are proposed for the partial fracture of the prestressed steel hollow slab.