1. The surface of the bridge deck is water-proofed, and the surface of the high-speed railway box girder is flat and water-proof.
2. Milling and planing of asphalt pavement, rutting, net cracking and potholes. Clear the ice and snow from the bridge deck and road surface.
3. Lightly roughen the original old pavement before new asphalt concrete paving, or cooperate with a large milling machine to complete the milling and roughening operations in the corner area and the area with dense steel bars.