中文摘要：

利用GDS应力路径三轴仪,对无根素土和根-土复合体均进行等向固结和K0固结后,再分别对其进行了普通三轴压缩和减压三轴压缩排水剪切试验。在不同固结方式和不同三轴试验条件下,对比研究了无根素土和根-土复合体的抗剪强度特性受不同应力路径条件的影响。通过研究得到了诸多有益的结论,证明了不同应力路径对根-土复合体的抗剪强度具有不同的影响。通过对试验结果的拟合,得到了可用于描述根-土复合体临界状态曲线的幂函数关系式并确定了相关参数。研究结果为在生态边坡稳定性分析中,获得合理的抗剪强度参数提供了理论基础。

英文摘要：

Under the conditions of isotropic consolidation and K0 consolidation,a series of drained triaxial compression tests on rootless soil and root-soil composite are performed respectively,by GDS Stress Path Triaxial Testing System. These experiments are including conventional triaxial compression and reduced triaxial compression. The effects of stress paths on the shear strength characteristics of rootless soil and root-soil composite are studied comparatively,by different consolidation methods and different triaxial compression test methods. Through this experimental study some useful conclusions have been obtained,and it is proved that the different stress path has different effects on the shear strength of root-soil composite. By fitting the experimental results,an equation is obtained,which is in the form of power function and can be used to describe the critical state curve of root-soil composite. Furthermore,the related parameters are given. The research results provide a theoretical basis for the determination of some reasonable shear strength parameters,which is necessary for the analysis of ecological slope stability.