A load deformation model for subgrade soils is developed, where total cumulative axial strains are correlated with applied stresses and number of load repetitions. The model is based on the results ofrepeated load tests for a compacted silty clay. The concept of a constant failure strain independent of load history is presented and used in the proposed model. Results of static triaxial tests, slow cyclic tests, and repeated load tests are used to verify that the failure strain for given compaction conditions and confining pressure isessentially independent of stress history. Good agreement is obtained between predicted strains and experimental values from repeated load tests. Model predictions are within plus or minus 10% of experimental results. This paper appears in transportation research record no. 1278, Dynamic testing of aggregates and soils and lateral stressmeasurements 1990.
Samenvatting