Discussion on the Maintenance and Reinforcement Technology of Zhengjialiang 2# Bridge and Yingzui Bridge of G109 Line in Baiyin Highway Section in 2019

Yingzui Bridge was built in 1998. The upper structure of the bridge is a 1～6 m reinforced concrete rectangular slab, and the lower part is a concrete U-shaped platform expansion foundation. The main diseases of the bridge: there are 6 longitudinal through seams and 2 transverse cracks at the bottom of the slab; 1 transverse through seam and 3～4 vertical cracks on the 0 and 1# platform bodies. The cracks were sealed by glue injection in 2018 Treat. The side walls have serious vertical and horizontal cracks, the concrete falls off, and the platform cap cracks; the bottom of the bridge part of the slab is effluent, rusted, and carbonized, and the concrete falls off seriously.