CSI Code | Short Description | Extended Description |
02400 | Tunneling, Boring and Jacking |
02410 | Tunnel Excavation | Compressed Air Tunneling Muck Disposal Rock Excavation - Drill and Blast Rock Excavation - Tunnel Boring Machine Soft Ground Shield - Driven Tunneling |
02420 | Initial Tunnel Support System | Prefabricated Steel Tunnel Linings Rock Bolting Steel Ribs and Lagging |
02425 | Tunnel Lining | Cast - in - Place Concrete Tunnel Linings Precast Concrete Tunnel Lining |
02430 | Tunnel Grouting | Earth Stabilization Chemical Grouting Rock Seam Pressure Grouting Tunnel Liner Grouting |
02440 | Immersed and Sunken Tube Tunnel |
02441 | Microtunneling |
02442 | Cut and Cover Tunnel |
02443 | Tunnel Leak Repair |
02444 | Shaft Construction |
02445 | Boring or Jacking Conduit |