Sistemática de cálculo para o dimensionamento de galerias de águas pluviais: uma abordagem alternativa
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Data
2012-07-25
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Universidade Federal de Goiás
Resumo
The use of tables for the design of storm sewer system is considered by
both professionals and training students as a hard task due to the need for
successive interpolations in the search of the depth‐diameter ratio and of velocity
imposed as thresholds, given the essential condition of the design as partially filled
pipes. In this way, the replacement of tables and nomographs by equations that can
be arranged in a spreadsheet speeds up the process and understanding of
calculations. This study aimed at developing a systematic calculation for the design
of storm sewer systems as opposed to the use of tables based on the Manning's
Formula. An advantage in relation to the traditional process using interpolations lies
on the time spent and the possibility of using spreadsheets available in personal
computers. The development of the set of equations was based on Saatçi (1990), by
imposing thresholds for the depth‐diameter ratio and velocity. Another required
step was the adimensionalization for calculating the central angle given the
different existing commercial diameters. The equations for the central angle and
depth‐diameter ratio presented a high coefficient of determination (R²=0.99). The
equations were tested for eight hypothetical stretches of storm sewer systems
including the following restrictions: the depth‐diameter ratio and velocity resulting
in values similar to tabulated. This process aims to reduce the time and ease the
analysis of alternatives such as changes of diameters and even the slope in the
design of storm sewer systems.
Descrição
Palavras-chave
Drenagem urbana, Sistematização de cálculo, Galerias de águas pluviais, Urban drainage, Systematic calculation of drainage systems, Storm sewer systems
Citação
MENEZES FILHO, Frederico Carlos Martins de; COSTA,Alfredo Ribeiro da. Sistemática de cálculo para o dimensionamento de galerias de águas pluviais: uma abordagem alternativa. Revista Eletrônica de Engenharia Civil, Goiânia, v. 1, n. 4, 2012. Disponível em: https://revistas.ufg.br/reec/article/view/18162. Acesso em: 4 nov. 2022.