Replacement of Pontesei Bridge, Italy
Publication: Journal of Bridge Engineering
Volume 9, Issue 5
Abstract
Pontesei Dam is a major concrete dam built after World War II across the canyon of Maè Creek (Valle di Zoldo) in the Italian Eastern Alps. Just upstream from the dam, a gully discharges water from steep mountains. The only road serving the dam and the entire valley upstream of the dam runs along the mountainside and crosses the gully. In 1959, an exceptionally rainy season caused a flood, which destroyed the bridge. A temporary Bailey bridge was subsequently built by the army, but in 1990 it was decided to design a new bridge. The main challenges posed to the designer included building the new deck and the abutments underneath the Bailey bridge without disrupting traffic, hoisting the deck just to the bottom of the Bailey bridge, and finally substituting the new deck for the Bailey bridge in one day. Other problems included the instability of the rock mass at the abutments and the gravitative convergence of the two sides of the gully. This paper describes the design, construction, and testing of the bridge replacement and the bridge abutments.
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References
Kiersch, G. A. (1964). “Vaiont Reservoir disaster.” Civ. Eng., March, 32–40.
Mammino, A. (1994). Micropali, Tecniche di Analisi e di Progetto (Micropiles—Analysis and design techniques), Alinea Editrice, Florence, Italy.
Milli, E. (1979). Strada Statale No. 251—Attraversamento del Rio Bosconero (Km 117+970)—Relazione Geologica [State Road No. 251—Bosconero Creek crossing (Sta. 117+970)—Geological Rep.].
Milli, E. (1985). Strada Statale No. 251—Attraversamento del Rio Bosconero (Km 117+970)—Relazione Geologica Integrativa [State Road No. 251—Bosconero Creek crossing (Sta. 117+970)—Supplemental Geological Rep.].
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Copyright © 2004 American Society of Civil Engineers.
History
Received: May 20, 2002
Accepted: Feb 3, 2003
Published online: Aug 16, 2004
Published in print: Sep 2004
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