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World’s Largest EPB Shield Tunneling Machine – Building underground highway in Seattle

| Science and Technology Reports | 06/09/2014

Hitachi Zosen Corporation - SR99 Tunnel Project 10

The World’s Largest EPB Shield Tunneling Machine
Source: Hitachi Zosen Corporation

The Hitachi Zosen Sakai Works has completed work on the world’s largest earth pressure balance (EPB) shield tunneling machine, with a diameter of 17.45 meters.The tunneling machine will be delivered by ship to Seattle in March 2013.

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