This paper investigated the deformation behaviour of K-consolidated sand–clay mixtures through cyclic triaxial (CT) and hollow cylinder (CHC) tests. The sand–clay mixtures contained 0%, 5%, 10% and 20% clay by weight and were prepared at a relative density of 75%. Clay inclusion caused an increase in the permanent axial strain of mixtures (0.075% to 5% in CT and 0.186% to 5% in CHC), while a relatively insignificant increase in permanent axial strain was observed in the CT specimens containing 5% and 10% clay (0.075% to 1.299%). However, all CHC specimens with clay failed (ε_z ≥ 5%). It was also observed that shear strain development of sand is significantly influenced by clay inclusion (0.096–2.241%) in CHC tests. Test results clearly show that the effect of a principal stress rotation should be taken into account to better estimate the deformation behaviour of sand–clay mixtures under repetitive traffic loads.

本文通过循环三轴 (CT) 和空心圆柱 (CHC) 试验研究了K固结砂粘土混合物的变形行为。砂-粘土混合物含有按重量计 0%、5%、10% 和 20% 的粘土，并以 75% 的相对密度制备。粘土夹杂物导致混合物的永久轴向应变增加（CT 中为 0.075% 至 5%，CHC 中为 0.186% 至 5%），而在含有 5% 和 10 % 粘土（0.075% 至 1.299%）。然而，所有带有粘土的 CHC 试样都失败了 (ε _z ≥ 5%）。在 CHC 试验中还观察到，沙子的剪切应变发展受到粘土夹杂物（0.096-2.241%）的显着影响。测试结果清楚地表明，应考虑主应力旋转的影响，以更好地估计重复交通载荷下砂粘土混合物的变形行为。