What are the properties of tunnel?

Answer 1

Tunnels are underground or underwater passages typically used for transportation, utilities, or drainage. Key properties include structural integrity, which involves careful engineering to withstand external pressures; ventilation systems to ensure air quality; and waterproofing to prevent water infiltration. Additionally, tunnels often require specific materials and designs to accommodate the geological conditions they traverse, enhancing safety and durability. Proper lighting and emergency exits are also critical for ensuring user safety.