USA

Norris Cut Projekt:
Tunneling at Florida’s Coast

The launch shaft on Virginia Key with a diameter of only 12 m saved space. As a result, however, the HCS machine had to begin the drive in pipe jacking mode using a jacking frame adapter Quelle/credit: Herrenknecht
The launch shaft on Virginia Key with a diameter of only 12 m saved space. As a result, however, the HCS machine had to begin the drive in pipe jacking mode using a jacking frame adapter
Quelle/credit: Herrenknecht
In February 2016 the TBM reached the target shaft on Fisher Island around 1.6 km away in less than ten months. In late 2016 a new 60“ sewer line, installed in the segmentally lined protection tunnel, will replace the old, worn-out line and transport wastewater from Fisher Island to the treatment plant on Virginia Key Quelle/credit (2): Herrenknecht
In February 2016 the TBM reached the target shaft on Fisher Island around 1.6 km away in less than ten months. In late 2016 a new 60“ sewer line, installed in the segmentally lined protection tunnel, will replace the old, worn-out line and transport wastewater from Fisher Island to the treatment plant on Virginia Key
Quelle/credit (2): Herrenknecht

In February 2016 construction company Bessac completed work on the Norris Cut protection tunnel in extremely difficult geology in South Florida. Norris Cut is a shallow inlet between Fisher Island and Virginia Key, just south of the Main Channel to the Port of Miami.  In just ten months and using a customized machine designed especially for the mission, a “Herrenknecht Combined Shield” (HCS, diameter 3.13 m), 1613 m were tunnelled adhering to the highest safety standards. A new sewer line was installed in the finished tunnel – after half a century in use the old pipe was simply worn out.

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