Both monotonic drained and cyclic undrained tests are performed in large triaxial aparatus. Sand contents of 100%, 80%, 65% and 50% are selected for the tested sand-gravel mixtures. The purpose of the study is to evaluate effect of gravel contents on behaviour of sand-gravel mixtures. Discussion on important parameters for evaluating the static and cyclic strength of gravelly sands is given. This paper presents an interpretation of the monotonic and cyclic large size triaxial tests on clean sand and sand-gravel mixtures, including contour diagrams of cyclic strength and strain development. The test results indicated that static compression strength is changing with variations of gravel contents for sand-gravel mixtures. However there is no clear trend on cyclic strength. The results are expected to be of significant value for offshore windfarm foundation design.
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
3 - Constitutive models and soil behaviour modelling