The invention relates to a reinforcement structure for solving a cracked steel
bridge deck by using lightweight aggregate concrete. According to key points of the technical scheme, the reinforcement structure comprises the fatigued cracked steel
bridge deck, shear connecting pieces,
fiber reinforced composite
layers, reinforcing meshes and a lightweight aggregate concrete layer. The fatigued cracked steel
bridge deck is provided with the shear connecting pieces, and the reinforcing meshes are placed on the fatigued cracked steel bridge
deck. The
fiber reinforced composite
layers are laid on the crack parts of the fatigued cracked steel bridge
deck, and the lightweight aggregate concrete layer is poured on the fatigued cracked steel bridge
deck and covers the shear connecting pieces, the
fiber reinforced composite
layers and the reinforcing meshes to be connected with the fatigued cracked steel bridge deck. The shear connecting pieces are connected to the
fiber reinforced composite layers, and the shear connecting pieces are arranged in the transverse bridge direction of the fatigued cracked steel bridge deck by fiber reinforced composites. The shear connecting pieces are arranged on the fatigued cracked steel bridge deck, and the
fiber reinforced composite layers connected with the shear connecting pieces are laid between the shear connecting pieces connected with the steel bridge deck, wherein the spacing of the adjacent shear connecting pieces is 100-300 mm.