Hydraulic Roughness of Untroweled Field Cement Mortar Lined Olmsted 102-in. Diameter Pipeline
Publication: Pipelines 2023
ABSTRACT
The Olmsted 102-in. diameter welded steel pipeline was originally constructed in the 1950s and conveys water to the 11 mega-watt Olmsted Hydroelectric Power Plant. As part of the rehabilitation and replacement of the Olmsted Power Plant in 2018, an in-place cement mortar lining was installed inside the pipeline in accordance with AWWA C602, Standard for Cement-Mortar Lining of Water Pipelines in Place—4 in. (100 mm) and Larger. It was decided during construction that the field-installed cement mortar lining would not require a finished troweled surface because of concerns related to the out-of-round and elliptical shape of the pipe. It was also assumed that the untroweled cement mortar lining would exhibit a hydraulic surface roughness similar to that of the surface of an orange, as suggested in AWWA C602. This paper will present the hydraulic capacity and roughness characteristics of the untroweled cement mortar lining along with the field-measured and calibrated roughness characteristics for this pipeline based on the original bare steel lining and subsequent field-installed epoxy lining used in the existing 102-in. diameter pipeline. The hydraulic roughness was determined by measuring free water surface elevations and installing manometers along the pipeline to collect hydraulic grade line data for flows between 100 and 400 cubic feet per second (cfs). The roughness and surface profile of the field cement mortar lining will also be presented based on collected samples of the lining once it was removed. The benefits of this paper will be a presentation of roughness coefficients for a large-diameter pipeline that utilized different lining systems, all field-measured and calibrated under similar flow and hydraulic conditions. The subject matter will be useful for pipeline designers and utility owners considering different options for the rehabilitation of linings in large-diameter pipelines.
Get full access to this article
View all available purchase options and get full access to this chapter.
REFERENCES
ANSI/AWWA (American National Standards Institute/American Water Works AssociationANSI/AWWA). ANSI/AWWA C602, Cement Mortar Linings of Water Pipelines in Place 4 in (100 mm) and Larger, 2017. Denver, CO: American Water Works Association.
Lambson, C., Mickelson, M., Jones, N., and Murdock, A. (2004). “102-inch Cliff Pipe Rehabilitation”, ASCE Pipelines 2004: American Society of Civil Engineers, Reston, VA.
Pitcher, D., Lambson, C., Devey, D., Mickelson, M., Jones, N., and Murdock, A. (2003). “120” Olmsted and 90” Alpine Aqueduct Landslide Crossings,” ASCE Pipelines 2003, American Society of Civil Engineers, Reston, VA.
Information & Authors
Information
Published In
History
Published online: Aug 10, 2023
ASCE Technical Topics:
- Building materials
- Cement
- Concrete
- Construction engineering
- Construction methods
- Energy engineering
- Energy infrastructure
- Energy sources (by type)
- Engineering materials (by type)
- Hydraulic engineering
- Hydraulic properties
- Hydraulic roughness
- Hydro power
- Infrastructure
- Lifeline systems
- Linings
- Materials engineering
- Mortars
- Pipe sizes
- Pipeline systems
- Pipes
- Power plants
- Renewable energy
- Steel pipes
- Water and water resources
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.