The Southern Interchange Compound is currently being used for tunnelling and surface roadwork activities. Once the project is completed, the Southern Interchange will provide connections between the NorthConnex tunnel, Hills M2 Motorway and Pennant Hills Road.
A roadheader, also called a boom-type roadheader, road header machine, road header or just header machine, is a piece of excavating equipment consisting of a boom-mounted cutting head, a loading device usually involving a conveyor, and a crawler travelling track to move the entire machine forward into the rock face.
Practical Tunnel Construction [Gary B. Hemphill] on . *FREE* shipping on qualifying offers. The only modern guide to all aspects of practical tunnelconstruction Practical Tunnel Construction</i> fills a void in theliterature for a practical guide to tunnel construction.