论文部分内容阅读
Farulla等[1]通过固结仪对不同轴应力下的超固结非饱和土进行了湿化变形研究,试验结果表明超固结非饱和土的湿化变形随轴应力的不同而不同,其规律与Alonso等[2]的假设并不完全相符。为了进一步验证这个试验现象,利用双压力室非饱和土三轴仪,在同一个前期固结压力下对不同程度的超固结非饱和土进行了湿化试验,研究其湿化变形特性;对某一吸力下的超固结非饱和土进行三轴排水剪切试验,研究其体变和强度特性。试验结果证明了Farulla等试验的正确性,最后用文中所提的模型进行了预测,其结果与试验现象一致。
Farulla et al. [1] studied the wet deformation of overconsolidated unsaturated soils under different axial stresses by means of a consolidation tool. The experimental results show that the wet deformation of overconsolidated unsaturated soils varies with different axial stresses, The rules do not exactly match the assumptions of Alonso et al. [2]. In order to further validate the phenomenon of this test, the humidification tests of different degrees of overconsolidated unsaturated soils were carried out under the same pre-consolidation pressure to study their wet deformation characteristics by using the double pressure chamber unsaturated soil triaxial apparatus. Under a certain suction, the overconsolidated unsaturated soil undergoes triaxial drainage shear tests to study its bulk and strength characteristics. The test results prove the validity of Farulla and other tests, and finally predict with the model mentioned in the paper. The result is consistent with the experimental results.