American Society of Civil Engineers


Control of Scour at Bridge Piers by a Downstream Bed Sill


by Carmelo Grimaldi, (Dipartimento di Difesa del Suolo “V. Marone,” Università della Calabria, Ponte P. Bucci, Cubo 42b, 87036 Rende (CS), Italy. E-mail: carmelogrimaldi@yahoo.it), Roberto Gaudio, (Dipartimento di Difesa del Suolo “V. Marone,” Università della Calabria, Ponte P. Bucci, Cubo 42b, 87036 Rende (CS), Italy. E-mail: gaudio@unical.it), Francesco Calomino, (Dipartimento di Difesa del Suolo “V. Marone,” Università della Calabria, Ponte P. Bucci, Cubo 42b, 87036 Rende (CS), Italy. E-mail: calomino@dds.unical.it), and António H. Cardoso, (Departmento de Engenharia Civil e Arquitectura, Instituto Superior Técnico, Avenida Rovisco Pais, 1, 1049-001 Lisboa, Portugal. E-mail: ahc@civil.ist.utl.pt)

Journal of Hydraulic Engineering, Vol. 135, No. 1, January 2009, pp. 13-21, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9429(2009)135:1(13))

     Access full text
     Purchase Subscription
     Permissions for Reuse  

Document type: Journal Paper
Abstract: Results are presented from laboratory experiments to investigate the effectiveness of bed sills as countermeasures against local scouring at a smooth circular bridge pier, for flow conditions near the threshold of uniform sediment motion. The bed sill was located downstream of the pier, and its effectiveness with the distance between pier and sill was evaluated. The dependence of the scour depth on different dimensionless groups was defined. The results showed that a bed sill placed at a short distance downstream of the pier reduces the scour depth, area, and volume. In particular, the smaller the distance between the two structures, the larger the effectiveness of the countermeasure. The bed sill seems to take effect some time after the beginning of the test, as the scour hole downstream of the bridge pier develops sufficiently and interacts with the countermeasure.


ASCE Subject Headings:
Scour
Bridges
Piers
Experimentation