calldocumentfacebookmessagemypartnerwindowsapplegoogleplayworkerroutecoinspinterestplaysearchsmartphonetwittercaraccordeonvideoarrowarrowdownloaddownloaduploadsection_scrollerglobemapIcon-Shop-Websitecontactenergyhomebridgeshighrisetunnelmininghousearrow-uparrow-downarrow-leftarrow-leftarrow-circle-rightchevron-right-circleuserexternlinkcartissuuclosekeystarweb

2nd Midtown Tunnel

United States of America

A new two-lane transportation tunnel under the Elizabeth River and parallel to the existing Midtown tunnel. This is the first SL-1 Tunnel project in the USA

Back

Project data

Year of completion
2015
Project duration
36 Months
Country
United States of America
Address
Norfolk and Portsmouth VA.
Town or city
Portsmouth
Realization
Skanska-Kiewit-Weeks - Joint Venture
Structure
Tunnel
Type of structure
Cut-and-cover tunnel
Architect
Parsons Brinckerhoff

Floor-slab

Construction method
Arched
Cross-sectional shape
Multi-cell box girder – straight webs
Structure height
28,50 m
Number of spans
11
Longest span
54,00 m
Clear width
36,00 m
Clear height
21,50 m
Formed length of tunnel
3770 m
Shape
Radius
Type of carriage/traveller or formwork
Large formwork traveller
Number of casting sections
55
Cycle time
4 -day cycle
Form-tie pattern
Stipulated by architect
Type of edge
Rounded/chamfered edge