冯永珍, 张吾渝, 马艳霞, et al. Deformation Analysis of Remolded Loess under Principal Stress Axes Rotation Considering the Effect of Deviatoric Stress Ratio[J]. 2018, 38(3): 535-541.
冯永珍, 张吾渝, 马艳霞, et al. Deformation Analysis of Remolded Loess under Principal Stress Axes Rotation Considering the Effect of Deviatoric Stress Ratio[J]. 2018, 38(3): 535-541. DOI: 10.13409/j.cnki.jdpme.2018.03.018.
Three groups of tests on remolded loess under complex stress path are conducted using the hollow cylinder apparatus of Zhejiang University.The investigation highlights the influences of deviatoric stress ratio and rotation of principal stress axes on the deformation behaviors of remolded loess.The experimental results show that the strength of remolded loess is different under different deviatoric stress ratio;The soil strength reaches a minimum whenη=0.133 and it peaks whenη=0.433.When the deviatoric stress ratio gradually increases from 0.133 to 0.433
the normalized strength initially increases
declines
and then increases and declines
again.The principal stress axes rotation has an effect on the strain increments of the remolded loess
and the effect becomes the greatest for the intermediate principal strain increment.The maximum and minimum principal strains symmetrically develop on theε-q coordinate plane
which follow the conditions ofΔ
ε
z
>0 andΔ
ε
θ
<
0.In general
the intermediate principal strainΔ
ε
r
<
0.When the principal stress axes rotation meets the condition ofα>45°
the intermediate principal strain shows a different pattern.The remodeled loess demonstrates the anisotropic characteristics under unidirectional rotation of the principal stress axes.