A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Trenchless Water Main Rehabilitation Design Considerations
Aging infrastructure is a major problem facing the USA. ASCE's Infrastructure Report Card graded the nation's water distribution systems with a D-, and indicated an annual shortfall of $11 billion to renovate the aging drinking water infrastructure needs over the next 20 years. Consequences of failure in a water distribution pipeline may be severe, including water quality degradation, hydraulic capacity loss, structural failure, and water losses due to leakage. Recent technological advances in trenchless methods are being considered by more water authorities across the country because they minimize the need for excavation and can save from 20 to 60 percent in overall costs. The objective of this study was to provide an overview of trenchless water main rehabilitation and analyze the effect of trenchless pipeline rehabilitation on the hydraulic capacity. Data from experimental work on a full-scale testing setup (for relined and slightly deteriorated unlined pipe) and computational flow analysis (for pipe in poor condition) showed that rehabilitation will significantly increase flow capacity (that is more flow at the same pumping power) of a severely deteriorated pipe. Whereas, flow capacity might be decreased by as high as 20 percent for the slightly deteriorated cast iron water main in comparison with relined pipe.
Trenchless Water Main Rehabilitation Design Considerations
Aging infrastructure is a major problem facing the USA. ASCE's Infrastructure Report Card graded the nation's water distribution systems with a D-, and indicated an annual shortfall of $11 billion to renovate the aging drinking water infrastructure needs over the next 20 years. Consequences of failure in a water distribution pipeline may be severe, including water quality degradation, hydraulic capacity loss, structural failure, and water losses due to leakage. Recent technological advances in trenchless methods are being considered by more water authorities across the country because they minimize the need for excavation and can save from 20 to 60 percent in overall costs. The objective of this study was to provide an overview of trenchless water main rehabilitation and analyze the effect of trenchless pipeline rehabilitation on the hydraulic capacity. Data from experimental work on a full-scale testing setup (for relined and slightly deteriorated unlined pipe) and computational flow analysis (for pipe in poor condition) showed that rehabilitation will significantly increase flow capacity (that is more flow at the same pumping power) of a severely deteriorated pipe. Whereas, flow capacity might be decreased by as high as 20 percent for the slightly deteriorated cast iron water main in comparison with relined pipe.
Trenchless Water Main Rehabilitation Design Considerations
Sever, V. Firat (author) / Bakeer, Reda M. (author)
Pipeline Division Specialty Conference 2010 ; 2010 ; Keystone, Colorado, United States
Pipelines 2010 ; 764-774
2010-08-26
Conference paper
Electronic Resource
English
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