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Waterview tunnel: How the boring machine works
New Zealand

Waterview tunnel: How the boring machine works

Video Graphics that show how the TBM (called an EPBM or Earth Pressure Balance Machine) will bore and line the tunnel for the 2.4 km stretch between Owairaka and Waterview. The Tunnel Boring Machine not only bores the tunnel but also lines the tunnel with segments, essentially making the tunnel as it excavates through the ground.