1. Construction of drainage structures
1.1 Shape of flow structures
The shape of drainage pipes is chosen on the basis of several factors, including expected flow rate, ease of construction and maintenance, and efficient use of space.
Small-diameter pipes are generally circular (see figure 1 ) because they are easy to manufacture, install and occupy minimal space, while minimizing the material required for their construction. The circular cross-section is also highly effective in resisting internal and external pressures. For these reasons, the circular shape is often preferred for domestic sewer pipes and other small drainage systems.
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Construction of drainage structures
Ancillary works
Bibliography
Standards and norms
- sanitation facilities – Title I: networks - Fascicule n° 70 -
- sanitation facilities – Title II: Stormwater collection, conveyance and storage facilities - Fascicule n° 70 -
- Équipement d´installations de pompage pour réseaux d'évacuation et d'assainissement - Fascicule 81-1 -
- mise en œuvre et essai des branchements et collecteurs d'assainissement - NF EN 1610 -
- réseaux d'évacuation...
Regulations
European Directive of May 21, 1991 concerning urban waste water treatment.
Arrêté du 22 juin 2007 relatif à la collecte, au transport et au traitement des eaux usées des agglomérations d'assainissement ainsi que à la surveillance de leur fonctionnement et de leur efficacité, et aux dispositifs d'assainissement non collectif recevant une charge brute de pollution organique supérieure à 1,2 kg/j de DBO...
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