Concrete Bridge-Tunnel Has No Deck

by Paul A. deNapoli, (M.ASCE), Former Chf. Engr.; Hayden, Harding & Buchanan, Inc., Boston, Mass.,

Serial Information: Civil Engineering—ASCE, 1977, Vol. 47, Issue 4, Pg. 75-77

Document Type: Feature article


Engineers solve the problem of how to economically span a single track railroad without interrupting train traffic. Highway fill was placed over post-tensioned precast concrete arch sections placed over an operational railroad track. This method of construction proved cost effective and avoided any interference with railroad traffic. This design also permitted the engineer to carry the typical roadway section over the bridge thus avoiding the undesirable side effects of typical bridge decks.

Subject Headings: Bridge decks | Railroad tracks | Bridge design | Railroad trains | Traffic management | Precast concrete | Construction methods

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