|
Cette méthode regroupe les défaillances en deux catégories : opérationnelle (accumulation de corps gras, racines, infiltrations) et structurelle (fissures, joints ouverts et bris des conduites), et prévoit jusqu'à trois niveaux de gravité. Dans le cas des défaillances structurelles, des facteurs comme la longueur et la profondeur des fissures sont pondérés pour obtenir une cote structurelle.
|
|
In the course of the inspection, defects are found, identified and coded. The IRC approach provides definitions for identifying and rating defects on the basis of type and degree of severity. There are two main types of defect - service (i.e., grease build-up, roots, infiltration) and structural (i.e., fractures, open joints and broken pipes) - and up to three levels of severity. For structural defects, factors such as the length and depth of the defect are weighted to give a structural rating; in the case of service defects, factors such as the percentage of the cross-section that remains open govern the service rating of a pipe segment.
|