The Northeast Boundary Trunk Sewer (NEBTS) was constructed between 1879 and 1894 and ranges from approximately 6 ft (1.8 m) to 23 ft (7 m) in diameter and is approximately 28,800 linear feet (LF) (8,778 m) in length. In 2018, DC Water commissioned a report on the condition of various sections of the sewer. Based on the results of the report, two sections/segments of the sewer required rehabilitation. Segment 1 has a circular cross section with a diameter of 22 ft (6.7 m). Segment 2 has a 9 ft (2.7 m) by 6 ft (1.8 m) wide egg-shaped cross section. DC Water tasked the Greeley and Hansen/Ramboll Joint Venture with analysis of rehabilitation alternatives. Once geopolymer was selected, the Joint Venture was tasked with a Finite Element Analysis to determine the thickness of the liner. Construction is anticipated to begin in Spring 2024 and finish in Summer 2025.
No takes yet. Share an insight, caveat, or question.
Bian et al. (2024) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: