New Pressuremeter Test Analysis Based on Critical State Mechanics
Publication: International Journal of Geomechanics
Volume 13, Issue 5
Abstract
To analyze the pressuremeter test results, the medium around the probe is modeled by a clay hollow cylinder subjected to external and internal uniform pressures. However, assuming that during the test the medium strains around the pressuremeter test cavity are homogeneous results in an oversimplification of the problem. A new analysis method is proposed based on an energy approach concept. The objectives are to determine the outer radius of the clay hollow cylinder that models a normally consolidated clay medium idealized in undrained conditions and to express the clay behavior by the effective stress path and the stress-strain relationship. At the position of three particles across such a cylinder, the developed excess pore water pressures were measured during testing. The analysis showed that the development of greater excess pore pressure than the circumferential stress in compression indicates the critical state and that the testing rate has a negligible influence on the deduced critical state. Thus, the undrained shear strength at the level of testing underground can be obtained.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 13 • Issue 5 • October 2013
Pages: 625 - 635
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 14, 2011
Accepted: Sep 25, 2012
Published online: Sep 27, 2012
Published in print: Oct 1, 2013
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