Overview
ABSTRACT
After having presented the various deterioration risks of sanitation networks, this article goes on to explain the encountered pathologies. Following, the diagnostic method for networks is detailed, as well as the various auscultation techniques used by professionals. In addition, the reader is provided with an overview of maintenance methods and rehabilitation, renovation and renewal techniques of sanitation networks and ancillary works. Methods for site monitoring are presented in a specific chapter. This article thus provides all the tools in order to implement a true patrimonial management of networks.
Read this article from a comprehensive knowledge base, updated and supplemented with articles reviewed by scientific committees.
Read the articleAUTHOR
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Jean-Marc BERLAND: Doctorate in Environmental Sciences and Techniques from the École Nationale des Ponts et Chaussées (France) - Project Manager, International Office for Water – CNIDE
INTRODUCTION
Sewer network maintenance consists of three main categories of tasks:
unclogging and hydrodynamic cleaning of pipes;
pumping of downspouts and storm water basins;
cleaning of sewage treatment plants, lift stations and grease traps.
For network inspection and diagnostics, specialists use mobile television equipment to check the condition of pipes. Anomalies are detected and located using a range of cutting-edge equipment and processes: push cameras equipped with laser or sonar systems, motorized video tanks or directional robots...
Finally, network rehabilitation can be carried out using trenchless techniques, or by opening trenches and laying a new pipe. This article looks in detail at these various options.
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KEYWORDS
public network | maintenance | sanitation works | | sewer sytems | sewage network
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Maintenance, diagnosis and rehabilitation of wastewater networks
Causes of damage to structures
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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