Inglewood Sanitary Trunk-A Case Study in Using Today's State of the Art Technologies to Provide Sewage Conveyance Capacity to Meet Tomorrow's Needs

摘要

The Inglewood Sanitary Trunk (IST) is a large diameter sanitary trunk located in Calgary, Alberta. Construction of Phase 1 was completed in November 2020 and consisted of approximately 3,500 m (2.2 mi) of 2,286/2,500 mm (90/98 in.) reinforced concrete pipe installed by microtunneling and approximately 270 m (0.17 mi) of 3,000 mm (120 in.) × 1,500 mm (60 in.) reinforced concrete box section installed by traditional cut and cover construction. Live connections were completed to 1,800 mm (71 in.) diameter pipe, a 2,100 mm (83 in.) × 1,500 mm (60 in.) concrete box section and the Bonnybrook Wastewater Treatment Plant (BBWWTP) headworks. Design of Phase 2 is currently nearing completion and consists of a twin 400 m-1,500 mm (60 in.) inverted siphon crossing of the Bow River. Construction is projected to be completed by 2024. When fully constructed, this upgrade will provide much needed additional sanitary capacity for a total equivalent population of 1.1 million residents and support growth to the 2,076 design horizon. This paper discusses the hydraulic concepts of the IST solution, design and selection of construction concepts, and a summary of the construction itself, including risk mitigation and project challenges overcome in the successful delivery of this project.