New York East Side Access

Contract CQ031

Client

Metropolitan Transit Authority MTA
USA

Contractor

Joint Venture: Granite - Traylor - Frontier
Consultant:
BeMo USA Inc.: Essential design-input for 3-cell NATM crosspassage between Yard Lead Tunnel and Emergency shaft structure; Consulting and Technical Support during execution; Know-how transfer; two SEM/ NATM Tunnel Superintendents for round the clock coverage on site

Project location

Long Island City, Queens
New York
USA

Start of construction

2010

End of construction

2012

Project total value

approx. 0.5 million €

Geology

Jet grouted soil

Technical Data

• Essential design input for design of a 3-cell crosspassage
• Know-how Transfer Project (application of SEM / NATM) for the construction of a 3-cell crosspassage between the segmentally lined Yard Lead Tunnel and a vertical concrete emergency shaft
• 3 tunnel excavation phases (each approx. 16.4 ft (5 m) in length)
• 3 waterproofing / concrete phases
• Cross sections: approx. 42 m²/ 28 m²/ 28 m² (452.08 SF / 301.39 SF / 301.39 SF)
• Excavation by mini excavator (Brokk) under spile umbrella and in jet grouted soil
• Installation of steel frame “hamster cages” in main tunnel

Further project related information

• Emergency shaft located in Amtrak area