Experimental Study on Influence of Initial Relative Dry Density on K0 of Coarse-Grained Soil

The coefficient of earth pressure at rest, K0, is a significant mechanical parameter, and the investigation K0 coarse-grained soil has important theoretical significance applicational value in geotechnical engineering. However, there are few studies on influence initial dry density (ρd) due to limitations related test instruments or methods. A series tests for two types soils (rockfill sandy-gravel soil) were conducted based newly developed large-scale apparatus reveal relationship between ρd soil. results showed that decreases with an increase vertical stress, this trend tends be gentle respect stress. also implied was negative linear ρd. Furthermore, comparative analysis rockfill indicated relative equation proposed by authors appropriate any type Moreover, empirical can accurately describe effective σv proposed, accuracy equations verified concerning sand-gravel Finally, published research findings, equations’ applicability verified.