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.

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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.