Abstract: In this paper, a series of triaxial consolidated-drained compressive shear tests (CD-test) were performed on a wide graded gravelly soil sample. The shear strength, stress-stain properties and the nonlinear parameters of Duncan model of this wide graded gravelly soil sample under different gravel contents and dry densities were devaluated. The results indicate that the shear strength and the parameters of Duncan model of this wide graded gravelly soil sample exhibit correlations with various of gravel contents and dry densities. When the content of coarse gravelly grains increases, the angle of internal friction φ and φ₀ also increases, the cohesion c increases initially then decreases. When the dry density increases, the angle of internal friction φ and φ₀ and Δφ increases, the cohesion c increases initially then decreases.

Key words: Wide Graded Gravelly Soil, Dry Density, Water Content, Shear Strength