SOME EFFECTS OF INTRINSIC CYCLIC LOADING IN SATURATED SANDS

This paper presents original results of triaxial experiments performed at a cyclically changed
pore pressure (intrinsic cyclic loading). The results display unusual behaviour of saturated
sand subjected to such atypical loading. Some features of this behaviour are shown, including
the following effects: static liquefaction of initially contractive sand, apparent creep of
initially dilative sand, initial anisotropy, etc. Some differences between the classical geotechnical
understanding of the effects of external cyclic loadings (such as earthquakes) and those
caused by intrinsic cyclic loadings (such as wave-induced pressures) are discussed.