Research Article
Apr 1978
Model Tests for Plastic Response of Lined Tunnels
Authors: Timothy C. Kennedy and Herbert E. LindbergAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 104, Issue 2
Abstract
Static isotropic and uniaxial strain loading tests were performed on models in a rock simulant having an unconfined compressive strength of about 4,300 psi (29.7 MN/m²) and a friction angle of 33°. The liners consisted of direct-contact steel tubes of three different radius-to-thickness ratios (a/h=50, 25, 12.5). In the isotropic loading experiments, the load-deformation relationship for the liners was in good agreement with theoretical curves from an elastic-plastic analysis and showed substantial increase in strength with increasing liner thickness. At the higher loads, the a/h=50 and a/h=25 liners buckled, and the deformations became larger than predicted by the theory. The a/h=12.5 liner did not buckle, even at tunnel closures of 5%. Similar behavior was found in uniaxial strain loading experiments, but 30% to 50% less load was required to cause 5% tunnel closure than under isotropic loading.
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Information
Published In
Journal of the Engineering Mechanics Division
Volume 104 • Issue 2 • April 1978
Pages: 399 - 420
Copyright
© 1978 American Society of Civil Engineers.
History
Published in print: Apr 1978
Published online: Feb 3, 2021
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Authors
Affiliations
Timothy C. Kennedy
Asst. Prof., Dept. of Mech. Engrg., Oregon State Univ., Corvallis, Oreg.; formerly, Research Engr., SRI International, Menlo Park, Calif.
Herbert E. Lindberg
Staff Scientist, SRI International, Menlo Park, Calif.
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