Technology of Water Proofing and Discharge of Double-arched Tunnels

Based on construction practise of Maoshan tunnel of western Guandong coastal highway, the paper introduces technology of water proofing and discharge of double arched tunnels including water proofing and discharge at top of middle blocking walls, treatment of coustruction crevice, treatment of streamed and linear water, and water-proof and discharge system of the tunnel, for a reference for similar engineering.