East Side Access CQ039

Northern Boulevard Crossing Tunnel

Project Details

TUTOR PERINI AFFILIATES

Superior Gunite
Shotcrete Subcontractor
Contract Amount: $1.5 Million

OWNER
NYC Metropolitan Transportation Authority

LOCATION
New York, NY

ARCHITECT
GEC (PB/STV/Parsons)

SIZE
125 Feet Long

COMPLETION
2015

Project Description

The Northern Boulevard Crossing tunnel is a crucial link for the East Side Access program. It is a 125-foot long, sequentially excavated tunnel. The tunnel is situated approximately 55 feet below the groundwater table and was mined through glacial deposits. The tunnel alignment also crossed beneath a pile-supported, elevated railway line; a six-lane street; and an active below-grade subway structure.

Superior Gunite’s scope was to expeditiously shoot the structural liner of this tunnel to then allow quickly unfreezing the ground and transfer the load from the above-ground structures. Coordination with the contractor allowed crews to use the same scaffolding system used by the lathers installing the reinforcing bars, saving time and money.

 

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