Water-pressure-resistant composite structure for tunnel

The utility model discloses a water-pressure-resistant composite structure for tunnel. The water-pressure-resistant composite structure is mainly composed of a water plugging reinforcement ring, a primary support, a culvert barrel waterproof and drainage network system and a secondary lining. The culvert barrel waterproof and drainage network system comprises a waterproof board and annular and longitudinal drainage pipes, wherein the waterproof board is arranged between the primary support and the secondary lining, and the annular and longitudinal drainage pipes are arranged at back of the secondary lining. The water plugging reinforcement ring, the primary support, the culvert barrel waterproof and drainage network system and the secondary lining are sequentially arranged from outside to inside. According to the water-pressure-resistant composite structure for the tunnel, a surrounding rock, serving as a bearing structure, can fully play a role in sharing external water pressure, deformation compatibility of