In-ground stress-strain condition beneath center and edge of vibratory roller compactor

摘要

Roller-integrated measurement of soil stiffness is now commonly used during continuous com-paction control (CCC). Soil stiffness is estimated from measured drum acceleration and eccentric position. Tobetter understand the relationship between roller measured stiffness and soil behavior, a study was conductedto capture in-ground stress strain behavior during roller passes. Experimental results show that vertical stressesbeneath the drum center are greater than under the drum edge. Combined with supporting theoretical analysis,the results illustrate that plane strain conditions exist under the drum center to a depth equal to 0.25 of the drumlength. Beyond that depth and at the drum edge, plane strain conditions do not exist.