Project description
Tunnel (CBBT) is a 30-km long 2-lane facility consisting of highways, bridges, tunnels (2 sections of 1.8km each) and artificial islands (connecting tunnel and bridge sections) connecting the Eastern Shore of Virginia with the Virginia mainland. In 2015-2016 the expansion of the first of the two tunnels was tendered. The Parallel Thimble Shoal Tunnel Project will construct a new two-lane tunnel under Thimble Shoal Channel. When complete, the new tunnel will carry two lanes of traffic southbound, and the existing tunnel will carry two lanes of traffic northbound.
Scope of work
TEC was a member of a design JV led by Arup New York and covered the following scope of work:
- Design development of immersed tunnel option
- Review of Geotechnical FE analyses (Plaxis)
- Assessment of the existing steel immersed tunnel with regard to the impact due to the construction of the new parallel bored tunnel
- Marine works design of the island protection and protective works on the tunnel
- Assessment of ship impact on the new tunnel and the protective works on top of the tunnel
- Design temporary jetty (construction purposes)
- Participation in (internal) design workshops and Clients’ meetings
Client
BTM JV : Bouygues (France) – Trailor Brothers (USA) – Manson Construction (USA)
In co-operation with
Arup New York / Michael Baker
Type of project
Country
USA
Location
Norfolk, West Virginia
Project duration
2015-2016
Project phase
Tender
Construction cost
Approx. $ 750 million (excl. VAT)
Consultancy fee
Approx $ 300.000,- (excl. VAT)