ASTM - GEOTECHNICAL TESTING JOURNAL
Geotechnical Testing Journal
-۴۰ / ۷
An Experimental Study on Excess Pore-Water Pressure Generation of a Poorly Graded Sand Using Combined RCTS Device
The combined dynamic torsional resonant column and cyclic torsional shear (RCTS) device is employed to study the generation of excess pore-water pressure, especially the threshold shear strain of excess pore-water pressure, γPPt , in an uncemented poorly graded granular soil.
Reconstituted specimens of uncemented sand were constructed under water and then tested in the RCTS device using a newly designed base pedestal, with which pore-water pressure is measured at four points systematically located at 0.75 times the radius of the base pedestal.
Specimens were tested under different mean effective confining pressures, and all specimens had B-values above 0.95 at the start of testing.
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