Multi-structure waterproof system and process for high-salt-rock-content stratum tunnel

The invention discloses a multi-structure waterproof system and process for a high-salt-rock-content stratum tunnel. The multi-structure waterproof system comprises an annular system and a longitudinal system. The annular system comprises a grouting ring, a primary support, a first waterproof layer, a waterproof concrete layer, a second waterproof layer and a secondary lining which are sequentially arranged. The longitudinal system comprises a water blocking tenon and a transition section. The transition section is arranged at the joint of a salt rock stratum and a non-salt rock stratum. According to the multi-structure waterproof system and process, underground water is prevented from entering the structure through an annular system, cl- is prevented from eroding the structure, and waterpressure and salt rock expansion force are resisted. Through a longitudinal system, flowing of the underground water is inhibited, and structural damage caused by salt rock corrosion around the tunnelis prevented. Meanwhile,