Accession Number : ADA137226

Title :   In Situ and Laboratory Shear Devices for Rock. A Comparison.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB

Personal Author(s) : Nicholson,G A

PDF Url : ADA137226

Report Date : Oct 1983

Pagination or Media Count : 144

Abstract : Shear strength parameters were measured using an assortment of testing devices. The results were compared and contrasted. The devices included machines routinely used by the U.S. Army Corps of Engineers and several machines with new or unusual features. The tests were performed on rock simulant and Rangely sandstone. The tests on rock simulant used specimen suites that included smooth cast joints, joints with asperities, and intact material. The tests on the Rangely sandstone were performed on clean discontinuities. All tests on the rock simulant were performed in the laboratory. One of the test suites on the sandstone was performed in situ; the remainder of the tests were performed in the laboratory. The tests showed substantial differences in strength parameters due to test machine details. The study demonstrated the need for a reliable direct shear device capable of testing 60-in.-diam core.

Descriptors :   *Rock mechanics, *Test methods, Rock, Substitutes, Sandstone, Shear strength, Shear stresses, Triaxial stresses, Variations, Test equipment, Laboratory tests, Field tests

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE