The experimental results show that the failure of specimens will be either hydraulic fracturing or shearing plastic flow, it depends on the initial principalstress ratio.
研究结果表明，在不同起始主应力比条件下，试件可以表现为水力劈裂破坏，也可以为剪切塑流破坏。
2
Water content wand initial average principalstress pm0 have significant influences on the initial dynamic shear modulus of undisturbed loess under the condition of pre-shearing stresses.
含水率与初始平均主应力对预剪应力作用下原状黄土的初始动剪切模量具有显著的影响；
3
The degrees of effects of water content wand initial average principalstress pm0 on the dynamic shear modulus of undisturbed loess reduce under the condition of pre-shearing stresses.