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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Structural Behavior of Precast Concrete Tunnel Liners
Author(s): William L. Gamble
Publication: Journal Proceedings
Appears on pages(s): 1-11
Keywords: deflection; liners; precast concrete; subways; testing; tunnels (transportation)
Abstract:Structural tests were conducted on precast concrete segmental tunnel liners considered for use in subway tunnels of the San Francisco Bay Area Rapid Transit District. Each tunnel liner ring consisted of seven segments which formed 30 in. of circular tunnel liner when bolted together. Two liner rings were tested, with loads applied to the outer surface of the rings at 12 points. The behavior of the rings was good. At the maximum load levels attainable, only a small amount of cracking had occurred. The acceptance criterion was that the rings should deflect at least 1 in. without visible damage. Both reached 2.5 in. deflection without appreciable damage.
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