Tunnel Ceiling Replaced over trafficby 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: Civil engineering landmarks | Ceilings | Precast concrete | Rehabilitation | Tunnels
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