INFLUENCE OF EQUIPMENT AND TEST PROCEDURES ON INTERPRETATION OF PRESSUREMETER TESTS . PRESSUREMETERS. PROCEEDINGS OF THE THIRD INTERNATIONAL SYMPOSIUM, ORGANISED BY THE BRITISH GEOTECHNICAL SOCIETY, OXFORD UNIVERSITY, APRIL 2-6, 1990
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Factors affecting pressuremeter test results are discussed. Specific aspects of equipment design and tolerances, installation method and test procedures are addresssed. It has been shown that volume change strain measurements in mono-cell instruments should be used with caution, possible hysteresis effects during unload-reload cycles and arm-membrane interaction should be checked for, tolerances in instrument dimensions are critical especially for small diameter instruments and rate effects can affect results in sands and clays. (Author/TRRL)