Reinforcing method for impacted damaged bridge girder

The invention discloses a method for reinforcing a bridge girder damaged by impact, which belongs to the field of bridge engineering and comprises the following steps: cleaning an impact damage area, and chiseling concrete of a girder web at the edge of the impact damage area; chiseling the auxiliary reinforcing area, and dividing the auxiliary reinforcing area into a deep chiseling interface area and a shallow chiseling interface area; mounting the formwork, pouring the ultra-high performance concrete, removing the formwork after the ultra-high performance concrete reaches the design strength, polishing away the protruding reinforcing material around the joint, coating the whole beam, unifying the appearance of the main beam, and finishing the reinforcing work. According to the invention, the bonding performance between the reinforcing material and the existing beam body can be ensured, and the cracking strength of the interface between the damaged area and the undamaged area can be improved by utilizing the