WORLD TRADE CENTER - GREENWICH STREET CORRIDOR

Contracting Agent:
Tutor-Perini

Project Location:
Manhattan, NY

Project Highlights:

The Port Authority of NY & NJ awarded Tutor-Perini a $178 million contract to build permanent bracing for the structural box that will enclose New York City Transit’s 1&9 subway structure running through the World Trade Center site. This contract, called the Greenwich Street Corridor, used top-down construction to build a box to brace the subway line. This box formed the foundation for the extension of Greenwich Street that now bisects the World Trade Center site. One of the Port Authority’s milestones, this contract was a critical element of the WTC reconstruction to assure public access to the 9/11 Memorial Plaza for use on the 10th anniversary of 9/11.

Atlantic Concrete Cutting was contracted by Tutor-Perini to cut apart the old slurry wall that ran beside this new box structure. Atlantic worked several shifts per day to cut the wall into manageable pieces using diamond wire sawing, a method of cutting concrete by using a diamond-impregnated steel cable as the "blade". In addition, hundreds of access holes had to be core drilled into the slurry wall to allow for the diamond wire to be fed through and to allow for the attachment of the steel cables needed to lift the pieces away.

The working conditions were rough at times because of cramped spaces, wet ground, and the constant noise of excavation and construction. Personal Protective Equipment was a must, and safe work practices had to be followed to a T.

Sections of the old slurry wall, cut and ready to be lifted away by crane.

Drilling access holes for wire sawing and for picking.

Working conditions were very cramped.

Working conditions were also very muddy.

Remaining portion of the old slurry wall.

Remaining portion of the old slurry wall.

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