Backup System and Tunnel Services
AssemblyA train of steel decks towed behind the machine that carries its power, hydraulics, conveyors and services, and supplies the tunnel behind it with fresh air, water, compressed air, drainage and material handling, plus a refuge chamber for the crew. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Backup System and Tunnel Services
13 top-level lines as of r194045| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Backup Bridge | main-beam-tbm-backup-bridge | 1× | 1 | · | part |
| 2 | Backup Deck | main-beam-tbm-backup-deck | 8× | 8 | · | part |
| 3 | Backup Wheel Set | main-beam-tbm-backup-wheel-set | 16× | 16 | · | part |
| 4 | Material Handling Crane | main-beam-tbm-material-crane | 1× | 1 | · | part |
| 5 | Electric Chain Hoist 9 parts | chain-hoist | 4× | 4 | 0 | product |
| 6 | Ventilation Duct Cassette | main-beam-tbm-duct-cassette | 1× | 1 | · | part |
| 7 | Tunnel Ventilation Fan 7 parts | tunnel-ventilation-fan | 1× | 1 | 0 | product |
| 8 | Dust Scrubber 4 parts | main-beam-tbm-dust-scrubber | 1× | 1 | 0 | assembly |
| 9 | Water Supply and Cooling 4 parts | main-beam-tbm-water-system | 1× | 1 | 0 | assembly |
| 10 | Dewatering Pump | main-beam-tbm-dewatering-pump | 2× | 2 | · | part |
| 11 | Rotary Screw Air Compressor 9 parts | screw-compressor | 1× | 1 | 0 | product |
| 12 | Refuge Chamber | main-beam-tbm-refuge-chamber | 1× | 1 | · | part |
| 13 | Workshop and Spares Store | main-beam-tbm-workshop | 1× | 1 | · | part |