SEDL / STP / STP392-EB / STP41281S

Measurement of Rock Deformations in Foundations for Mass Concrete Dams

Rouse, George C.
Head, Bureau of Reclamation, U. S. Dept. of the Interior, Denver, Colo

Richardson, Joe T.
Supervising structural engineer, Bureau of Reclamation, U. S. Department of the Interior, Denver, Colo

Misterek, Dewayne L.
Structural engineer, Bureau of Reclamation, U. S. Department of the Interior, Denver, Colo

Pages: 21    Published: Jan 1965

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Abstract

Three types of gages suitable for long-term rock deformation measurements have been developed. These gages were installed in foundation or abutment rock for mass concrete dams. Components of the gages used for indicating rock deformations are mechanical or electrical instruments. The measured results of 24 rock deformation gages having lengths ranging from 20 to 256 feet are reported. These results are used to determine (1) differential settlements beneath gravity structures, (2) deformation moduli of foundation rock, or (3) relative compression in abutment rock.