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Title

STRENGTH-FLOW PARAMETERS OF LOOSE SILTY SANDS FROM PIEZOCONE TESTS

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 Start Page 15 | End Page 23

Abstract

 Piezocone penetration tests with dissipation phases are particularly useful for geotechnical site characterization. They also provide three independent readings with depth from a single sounding as well as time-rate information. In past investigations, only SILTY SANDs with specific silt content have been tested and complete sets of tests have not been conducted to evaluate the influence of different silt contents on CPTU results. In the present research, the complimentary CPTU tests with PORE PRESSURE DISSIPATION phase and soil laboratory tests (including consolidation, PERMEABILITY and triaxial tests) are also performed on SILTY SAND samples with different silt content. In this study, six piezocone tests are performed in saturated SILTY SAND samples with several different silt contents ranging from zero to 50 percent. The PORE PRESSURE DISSIPATION tests are also carried out in samples and t50 (the time for 50% PORE PRESSURE DISSIPATION) is evaluated. Laboratory tests including consolidation, PERMEABILITY and triaxial tests are also performed for the soil parameter determination. Based on the obtained results, the interrelationships among “K- t50”, “Cv - t50” and “j' -qc” are finally presented.

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