Special-shaped TBM
Cross-Passage TBM
A cross passage is the lateral connection between two adjacent metro, rail or highway tunnels, providing connectivity, drainage and fire-safety functions, effectively 'tunnelling within a tunnel'. The CRCHI cross-passage TBM is a compact machine for this duty, sized to suit metro, rail and highway cross-passage geometries.
Features
Cuts main-tunnel segmental lining directly and efficiently
Fully sealed sleeve for both launch and reception
Pre-stressed reaction-frame support system
Highly integrated package optimised for tight working envelopes
Specifications
| Excavation diameter | 3,860 mm | |
| Main-machine length | 3.3 m | |
| Total weight | approx. 460 t | |
| Main drive | Electric drive, rated torque 1,470 kN·m | |
| Articulation type | Active articulation | |
| Installed power | approx. 370 kW |
Configuration and engineering
Every CRCHI TBM is engineered to project. Shield diameter, cutterhead geometry, drive power, segmental ring design and back-up arrangement are configured to the alignment, ground conditions and water pressure of the drive. Project-specific scope beyond the standard envelope is engineered to brief, and where a drive calls for it, a machine is developed from the ground up. CRCHI Australia is the engineering, commercial, commissioning and aftermarket point of contact for Australian projects.
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