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通过分析侧限压缩条件下基于应变考虑的土结构性参数和基于应力考虑的土结构性参数,给出了结构性参数的统一表达式,即采用割线模量表示的土体结构性参数。这种表示的积极意义在于避免了初始状态下基于应变考虑的土结构性参数和基于应力考虑的土结构性参数均无法求解的现象。构建了以主动作用为单变量描述的土体结构性参数模型,即基于相同应力方法的土结构性参数模型和基于相同应变方法的土结构性参数模型,并对杨凌黄土的原状样、重塑样和饱和样进行侧限压缩试验。通过试验值和计算值的比较,检验了模型的合理性。研究结果表明,试验值和计算值能够较好吻合。采用主动作用为单变量描述的土体结构性参数直观地反映主动作用对土体结构性的影响,同时简化结构性参数计算过程,实现数值计算。
By analyzing the constitutive parameters of soil based on strain and the constitutive parameters of soil based on stress, the unified expression of structural parameters is given, which is the constitutive parameters of soil with secant modulus. The positive meaning of this expression is to avoid the initial state of the soil structural parameters based on strain considerations and stress-based soil structure parameters can not be solved. The constitutive model of soil mass with active role as univariate is established, which is the soil structural parameter model based on the same stress method and the soil structural parameter model based on the same strain method. The original shape and remodeling of the Yangling loess Stricted and saturated specimens were subjected to confined compression tests. Through the comparison of test value and calculated value, the rationality of the model is verified. The results show that the experimental values and calculated values can be in good agreement. The structural parameters of soils, whose active role is described as a single variable, directly reflect the influence of the active effect on the structural properties of the soil, simplify the calculation process of the structural parameters and achieve numerical calculation.