Experimental study on permanent deformation characteristics of coarse-grained soil under repeated dynamic loading

Abstract Practical assessment of subgrade settlement induced by train operation requires developing suitable models capable describing permanent deformation characteristics filling under repeated dynamic loading. In this paper, load triaxial tests were performed on coarse-grained soil (CGS), and the axial strain CGS different confining pressures stress amplitudes was analysed. Permanent behaviors categorized based variation trend rate with accumulated shakedown theory. A prediction model considering state number cycles established, ranges parameters for types also divided. The results indicated that variational can be used as a basis classifying CGS. (confining pressure amplitude) has significant effects rate. accumulative described power function, reflect influence amplitude. study’s could help deepen understanding