INFRA 2013
Par George Del Rio et Abdelwahib Bekkouche, Ville de Montréal
L’étude de cas présentée dans cette conférence traite du gainage structural de 100 km de conduites de distribution d’eau en fonte et en fonte ductile pendant une période de 5 ans. Cette conférence présentera également la méthodologie et les critères de décision utilisés par la Ville de Montréal pour choisir et prioriser le renouvellement de ses conduites d’eau potable, une description de l’étendue des travaux, incluant le remplacement par technique sans tranchée des branchements de service en plomb, les leçons apprises et les avantages techniques et financiers que cette technologie de gainage (CIIP) apporte à la ville.
The City of Montreal’s Water Services Division, which manages over 4,200 kilometers of watermains, is responsible for the production and distribution of drinking water for 1.6 million people, businesses and industries. Like most cities in North America, the City of Montreal is faced with the costly repairs of watermain breaks and leaks. These breaks also result in water losses, frequent water disruptions as well as other negative impacts, such as impeding emergency response and damaging infrastructures.
In 2005, the City started an Asset Management Program whose master plan proposed massive investments in its water and wastewater infrastructures over the next 20 years. Due to lack of time and financial resources required to replace its deteriorated watermains, it was important that the City investigate other methods of renewing its water system and help reduce its capital investments in a time-efficient manner. In 2008, following an evaluation of the technology, a committee recommended the use of Cured-in-Place Pipe (CIPP) for watermain pipe rehabilitation in the City of Montreal. From 2008 to 2012, the City of Montreal rehabilitated over 100 km of small diameter distribution watermains with the use of CIPP liners.
The case study presented in this presentation represents the structural lining of 100 km of cast and ductile iron watermains with cured-in-place pipe (CIPP) over a 5-year period. This presentation will also present the methodology and decision criteria used by the City of Montreal to choose and prioritize the renewal of its watermains, a description of the scope of the work, including the trenchless replacement of lead services, the lessons learned and the technical and financial benefits that CIPP provides to the City.