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冻土与融土的主要区别是冰,温度变化影响着孔隙冰含量,进而影响着冻土的物理力学性质.广义非线性强度准则用一个表达式描述了材料在π平面及子午面上的非线性强度特性,其在主应力空间的π平面上的破坏函数为介于SMP准则和Mises准则之间的光滑曲线,子午面上的破坏函数为幂函数曲线.在该准则的框架下,通过国内学者已取得的冻土材料的三轴试验结果,研究冻土子午面上各参数随温度变化的规律,并验证该强度准则对于冻土材料的适用性.
The main difference between permafrost and thaw is ice, which affects the ice content in the pore, which affects the physical and mechanical properties of frozen soil. The generalized nonlinear strength criterion describes the material in the π plane and the meridian plane using an expression The linear intensity characteristics of the stress field in the π plane of the destruction function is a smooth curve between the SMP criterion and the Mises criterion and the damage function of the meridional surface is a power function curve.Under the framework of this criterion, The results of triaxial tests of permafrost material obtained by scholars have been used to study the law of temperature variation of each parameter on the meridional surface of frozen soil and verify the applicability of the strength criterion to the frozen soil material.