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2. Possible faults and their consequences
Sanitation network failures can be classified into five distinct families. We have ranked them in descending order of potential structural risk, and therefore of need for restructuring.
These are the following points:
breaks ;
deformations ;
leaks ;
one-off anomalies ;
damage to facings.
2.1 Breaks
Fractures are one of the families of failures most closely linked to structural risks (tables
1
and
2
, figures
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Possible faults and their consequences
Overall diagnosis of a wastewater network
Bibliography
Software tools
Software developed as part of the "Computer Aided REhabilitation of Sewer Networks" project, downloadable from the CARE-S project website:
Events
Pollutec in Paris every other year and in Lyons every other year.
Ville Sans Tranchée" exhibition organized by FSTT (France Sans Tranchées Technologies)
Standards
- Prescriptions générales pour les composants utilisés pour la rénovation et la réparation des branchements et des réseaux d'assainissement à l'extérieur des bâtiments. - AFNOR – Norme NF EN 13 380 - 2001
- Condition of drainage and sewage systems outside buildings – Part 2: Visual inspection coding system. - NF EN 13508-2 -
Regulatory texts
Arrêté du 22 juin 2007 relative 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 DBO5.
Websites
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SYNCRA (Syndicat national des contrôleurs de réseaux d'assainissement - National union of wastewater network inspectors)
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FSTT (France sans tranchées technologies – formerly Comité français pour les...
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