A different approach and result to the measurement of K_o of granular soils

An in-soil version of the null soil pressure measurement system has been used in the measurement of lateral earth pressures of granular soils for at-rest K o conditions. Four uniformly graded soils were tested, from particle diameter 0·15 mm through to 15 mm. Two significant observations were made based upon the data presented. For initial loading, the coefficient of lateral earth pressure, K o , was found to be higher for soil placed in a dense...