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
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).
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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