A series of direct shear tests were run on a saturated normally consolidated clay. The test were supposed to be run slow

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A Series Of Direct Shear Tests Were Run On A Saturated Normally Consolidated Clay The Test Were Supposed To Be Run Slow 1 (29.47 KiB) Viewed 19 times

A series of direct shear tests were run on a saturated normally consolidated clay. The test were supposed to be run slow enough that any shear induced excess pore pressures were able to dissapate and therefore the measured friction angle would be the effective friction angle. However the technician running the tests was in a hurry and speeded up the testing. As a result excess pore pressures were present during testing, but since the direct shear device had no way to measure pore pressure, this was not known. A staff engineer plots the data from the test and computes the effective friction angle (p') How would the true effective friction angle compare to the one calculated? O Less that that measured Equal to that measured Greater than that measured O Can't be determined without more data