Revista Recursos Hídricos

DOI:10.5894/rh34n1-3
O texto deste artigo foi submetido para revisão e possível publicação em janeiro de 2013, tendo sido aceite pela Comissão de Editores Científicos Associados em abril de 2013. Este artigo é parte integrante da Revista Recursos Hídricos, Vol. 34, Nº 1, 25-41, maio de 2013.

Métodos convencionais de proteções contra erosões localizadas junto de pilares e de encontros de pontes

Conventional local scour countermeasures for bridge piers and abutments

Cristina M. S. Fael ¹, António H. Cardoso ²

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1 - Professora Auxiliar /// Universidade da Beira Interior (Departamento de Engenharia Civil e Arquitectura) /// E-mail: cmsf@ubi.pt
2 - Professor Catedrático /// Instituto Superior Técnico (Departamento de Engenharia Civil, Arquitectura e Georrecursos).

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RESUMO
O objetivo deste artigo consiste na apresentação dos critérios de projeto relativos a soluções convencionais de proteção contra erosões localizadas junto de pilares e encontros de pontes. Incluem-se soluções que envolvem a construção de tapetes de enrocamento, de colchões Reno, de blocos artificiais ligados por cabos e de ensacados de argamassa, especificando-se métodos de cálculo das dimensões dos blocos naturais ou artificiais e sugerem-se esquemas simples de fixação das dimensões dos tapetes, tanto em planta como em corte. Apresentam-se ainda recomendações a respeitar na instalação de filtros granulares ou de geotêxtil.

Palavras Chave: Medidas de proteção, pilares e encontros de pontes, erosões localizadas

ABSTRACT
The purpose of this paper is the presentation of design guidelines of conventional local scour countermeasures at bridge piers and abutments. Namely, solutions involving the construction of riprap mattress, Reno mattresses, cable-tied blocks and grout-filled bags are included, by specifying predictors of block sizes, for both natural and artificial, while schematic solutions are also suggested for the plan form and the thickness and topographic placement of mattresses. Recommendations for the setting of natural and synthetic filters are finally presented.

Keywords:Scour countermeasures, piers and bridge abutments, local scour

 

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