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A platform for research: civil engineering, architecture and urbanism
16th Avenue Sanitary Trunk Sewer Rehabilitation Pilot Study—Sprayed Geopolymer Lining
Value engineering (VE) and peer review (PR) was performed on the Preliminary Design (30% Design) associated with the 16th Avenue Sanitary Trunk Sewer Rehabilitation project located on 16th Avenue (between Minghay Ave and 9th Line) in the City of Markham, York Region. The objective of the VE and PR was to perform an evaluation of the proposed trunk sewer rehabilitation approach based on existing information to identify the “the lowest risk, best technical, and best value solution available” for rehabilitation. The key requirements of the proposed rehabilitation solution were to minimize disruption, reduce construction risks, reduce capital cost, and minimize impact on hydraulic capacity of the sewer. The defects observed in the trunk sewer comprised of groundwater infiltration of varying flow rates located primarily at construction joints, and localized longitudinal cracking and fractures generally parallel to the pipe axis primarily located at or adjacent to pinch points (areas where tunnel section reduced due to difficulties encountered during tunnel construction). The findings of the PR and VE reported “the 16th Avenue sewer to be in adequate structural condition but suffering from high levels of infiltration in certain areas which can lead to structural problems if infiltration is left unattended.” The authors found the proposed preliminary design rehabilitation solution costly; and disruptive to local residents, businesses, and traffic throughout construction. After reviewing the full range of pipe rehabilitation technologies available in the marketplace, using a Multi Criteria Analysis process, it was concluded that a less-costly and lower risk solution to stop groundwater infiltration would be to consider the use of a high-strength spray applied geopolymer mortar to the inner surface of the pipe. A Pilot Study scope of work was developed to demonstrate the suitability of the geopolymer material and installation procedures as an option for system-wide sewer rehabilitation. This paper will discuss the findings of the VE and PR along with the design and results of the Pilot Study.
16th Avenue Sanitary Trunk Sewer Rehabilitation Pilot Study—Sprayed Geopolymer Lining
Value engineering (VE) and peer review (PR) was performed on the Preliminary Design (30% Design) associated with the 16th Avenue Sanitary Trunk Sewer Rehabilitation project located on 16th Avenue (between Minghay Ave and 9th Line) in the City of Markham, York Region. The objective of the VE and PR was to perform an evaluation of the proposed trunk sewer rehabilitation approach based on existing information to identify the “the lowest risk, best technical, and best value solution available” for rehabilitation. The key requirements of the proposed rehabilitation solution were to minimize disruption, reduce construction risks, reduce capital cost, and minimize impact on hydraulic capacity of the sewer. The defects observed in the trunk sewer comprised of groundwater infiltration of varying flow rates located primarily at construction joints, and localized longitudinal cracking and fractures generally parallel to the pipe axis primarily located at or adjacent to pinch points (areas where tunnel section reduced due to difficulties encountered during tunnel construction). The findings of the PR and VE reported “the 16th Avenue sewer to be in adequate structural condition but suffering from high levels of infiltration in certain areas which can lead to structural problems if infiltration is left unattended.” The authors found the proposed preliminary design rehabilitation solution costly; and disruptive to local residents, businesses, and traffic throughout construction. After reviewing the full range of pipe rehabilitation technologies available in the marketplace, using a Multi Criteria Analysis process, it was concluded that a less-costly and lower risk solution to stop groundwater infiltration would be to consider the use of a high-strength spray applied geopolymer mortar to the inner surface of the pipe. A Pilot Study scope of work was developed to demonstrate the suitability of the geopolymer material and installation procedures as an option for system-wide sewer rehabilitation. This paper will discuss the findings of the VE and PR along with the design and results of the Pilot Study.
16th Avenue Sanitary Trunk Sewer Rehabilitation Pilot Study—Sprayed Geopolymer Lining
Headland, Paul (author) / Steele, James (author) / Nuhfer, Mike (author) / Shah, Birju (author) / Servera, Vinor (author)
Pipelines 2017 ; 2017 ; Phoenix, Arizona
Pipelines 2017 ; 445-456
2017-08-03
Conference paper
Electronic Resource
English
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