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Tunnel Ceiling Replaced over traffic

by R. M. Monti, Dir. of Engrg.; Port Authority of New York and Jer Jersey, 72 South, One World Trade Center, New York, NY 10048,


Serial Information: Civil Engineering—ASCE, 1986, Vol. 56, Issue 6, Pg. 80-83


Document Type: Feature article

Abstract:

The ceiling of the Holland Tunnel under the Hudson River, connecting New Jersey and Manhattan, was 59 years old and needed replacement, a big job because there are 3 miles of ceiling in the two bores. Replacing the old cast in place concrete ceiling is a precast one. Extraordinary efforts wre made to retard corrosion of concrete-embedded and exposed steel. Embedded steel was either sand-blasted and covered with an advanced coating system, or covered with an aluminum-filled epoxy mastic, which requires minimum surface preparation. Concrete anchors that hold brackets to which the ceiling panels are bolted, are stainless steel. The old roadway drainage system�a trench embedded in the lining concrete along one side of the pavement�was filled with sediment and debris. It could not be readily cleaned, and will be replaced by a precast concrete one that can. A survey to establish precise dimensions for each ceiling panel was done by close-range photogrammetry, and the panel designers were given the dimensions data in digital form, thereby reducing time spend on design.

Subject Headings: Ceilings | Concrete | Precast concrete | Tunnels | Steel | Water transportation | Trenches

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