A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Scheduling Annual Inspections of Sanitary Trunk Sewers Using a Prioritization Framework
Sewers form a huge maze in the underground infrastructure where resource allocation could be an obstacle for decision-makers. The main aim of this paper is to develop a methodology for the Region of Peel to support its ongoing sewer inspection program by prioritizing sanitary trunk sewer (STS) segments within floodplains and adjacent to watercourses. While the overall project consisted of three main tasks submitted in three technical reports, this paper focused on one parameter (Importance Grade) of the prioritization methodology. The project started by analyzing closed-circuit television (CCTV) grades and the vulnerability factors that would expedite the deterioration of the assets. A Structural Performance Grade (SPG) was assigned to each trunk sewer by combining the impacts of the CCTV and vulnerability grades. A detailed sewer accessibility analysis was also performed using a Geographic Information System (GIS) tool to classify sewers by their level of accessibility. The accessibility and the consequence of failure (CoF) results were combined to calculate the Importance Grade for each STS. A structured decision-based matrix, combining the SPG and the Importance Grade, was used to determine the required inspection frequency. Based on the prioritization and from the identified STS that would be scheduled for inspection in the next five years, 84% (136 km out of 162 km) of the observed STS were within a floodplain, and 87% (83 km out of 95 km) of the STS were within a 10 m distance of the closest watercourse.
Scheduling Annual Inspections of Sanitary Trunk Sewers Using a Prioritization Framework
Sewers form a huge maze in the underground infrastructure where resource allocation could be an obstacle for decision-makers. The main aim of this paper is to develop a methodology for the Region of Peel to support its ongoing sewer inspection program by prioritizing sanitary trunk sewer (STS) segments within floodplains and adjacent to watercourses. While the overall project consisted of three main tasks submitted in three technical reports, this paper focused on one parameter (Importance Grade) of the prioritization methodology. The project started by analyzing closed-circuit television (CCTV) grades and the vulnerability factors that would expedite the deterioration of the assets. A Structural Performance Grade (SPG) was assigned to each trunk sewer by combining the impacts of the CCTV and vulnerability grades. A detailed sewer accessibility analysis was also performed using a Geographic Information System (GIS) tool to classify sewers by their level of accessibility. The accessibility and the consequence of failure (CoF) results were combined to calculate the Importance Grade for each STS. A structured decision-based matrix, combining the SPG and the Importance Grade, was used to determine the required inspection frequency. Based on the prioritization and from the identified STS that would be scheduled for inspection in the next five years, 84% (136 km out of 162 km) of the observed STS were within a floodplain, and 87% (83 km out of 95 km) of the STS were within a 10 m distance of the closest watercourse.
Scheduling Annual Inspections of Sanitary Trunk Sewers Using a Prioritization Framework
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / el Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / Kaddoura, Khalid (author) / Gan, Nicholas (author) / Chen, Leo (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 21 ; 261-272
2022-05-26
12 pages
Article/Chapter (Book)
Electronic Resource
English
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