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Second Midtown Tunnel: underwater solution to keep traffic flowing

Supplier: Doka Formwork Australia
11 June, 2013

The tunnel formwork traveller was completely pre-assembled from the flexible, high-performing 'Heavy-duty supporting system SL-1' in the dry dock in Baltimore, where the first trial pours for the eleven tunnel segments were carried out at the beginning of this year.

The major order that Doka 'landed' for the Second Midtown Tunnel will actually be finished underwater.

This 113 km long immersed tunnel will link the cities of Norfolk and Portsmouth in the US state of Virginia.

The eleven separate segments of the tunnel are being cast at a dry dock in Baltimore, MD, after which they will be floated about 320 km south to the Elizabeth River and lowered to the riverbed.

The 'Heavy-duty supporting system SL-1' tunnel formwork that Doka is supplying to this project is a high-performing yet cost-saving solution.

As well as being the first SL-1 project in the USA, the Second Midtown Tunnel is the biggest SL-1 tunnel project (by order volume) in Doka's history.

Click here to complete the complete press release from Doka Formwork Australia