An Experimental and Theoretical Study on the Dilatancy of Sand and Clays

摘要

Rowe's (1962) stress-dilatancyrelationship for sand, and Schofield and Wroth (1968) (Roscoe et al., 1963). and Roscoe and Burland (1968) energy equations for soft clays are classical work in describing the stress-dilatancy behaviour of sand and clay. However, the stress-dilatancy behaviour of soils is affected by the stress and strain paths followed by the soil and it is difficult to use a single equation to model the stress-dilatancy behaviour of all soils. In this paper, the historical development of the stress-dilatancy theories is briefly reviewed. The generalised stress-dilatancy behaviour of clay and sand is presented. Comparisons between the experimental observations and the theoretical predictions are made. The suitability of different stress-dilatancy theories to different soils under different testing conditions is examined. The data presented can also be used to examine other stress-dilatancy theories proposed by other researchers.