1, first flatten and tamp original drawing 2, dig 400mm × 600mm ditch at the bottom 3, brush slope - engineering or mechanical side slope brush design 4, pave 50mm-long and 0.8 thick washed-out sand 5, pave geomembrane 6, apply 30mm cement mortar on geomembrane door 7, assembling?reinforcement on cement mortar surface layer 8, asphalt crack pouring
