Chapter
Aug 30, 2024
Repairing History: DC Water’s Experience Designing the Rehabilitation of a 150-Year-Old Sewer
Authors: Steve Bian, P.E. [email protected], Haile Tsehayu, P.E. [email protected], Renni Zhao, Ph.D., P.E. [email protected], and Josh Crossen, P.E. [email protected]Author Affiliations
Publication: Pipelines 2024
ABSTRACT
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.
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REFERENCES
ASCE. ASCE 7-16: Minimum Design Loads for Buildings and Other Structures.
Assefa, M., and Frechette, D. (2022). “Appendix J – Finite Element Analysis (FEA) Report”, Major Sewer Rehabilitation 1-5 Northeast Boundary Trunk Sewer Concept Finalization Report. Washington, DC.
DACCO SCI, Inc. (2018). “Final Report – The Northeast Boundary Trunk Sewer Inspection – Phase II.” Columbia, MD.
Greeley and Hansen, LLC. (2021). Field Investigation Photos. Washington, DC.
Mathews, J., and Royer, J. R. (2018). “Laboratory Testing and Analysis of Geopolymer Pipe-Lining Technology for the Rehabilitation of Sewer and Stormwater Conduits”, Presentation No. TRB 19-01-01481, 2019 Annual Meeting, Transportation Research Board (TRB), January 13-17, 2019.
TMS 402-13/ACI 530-13/ASCE 5-13: Building Code Requirements and Specification for Masonry Structures.
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Pipelines 2024
Pages: 292 - 301
History
Published online: Aug 30, 2024
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Affiliations
1Supervisor, Civil and Structural Design, DC Water, Washington, DC. Email: [email protected]
2Supervisor, Dept. of Engineering and Technical Services, DC Water, Washington, DC. Email: [email protected]
3Engineer III, Civil and Structural Design, DC Water, Washington, DC. Email: [email protected]
4Civil Engineer and Associate, Greeley and Hansen, Alexandria, VA. Email: [email protected]
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