Published: Jan 1970
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An anlysis of the convergence of rock that accompanies the driving of a tunnel or underground chamber is presented. The analysis was used to augment conventional methods of determining in situ modulus of deformation for the design of an underground power plant chamber. An evaluation of rock behavior in the chamber is presented in which the relaxation analysis is used. Use of the relaxation analysis in determining in situ modulus of deformation for the design of the steel liner of a high-pressure discharge line in rock is also discussed.
rocks, rock mechanics, strains, subsurface structures, modulus of elasticity, determination of stress, deformation, electric power plant, pressure tunneling, evaluation
Associate engineer, California Department of Water Resources, Sacramento, Calif.