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在扰动状态概念基础上,建立了一个考虑土结构性影响的软黏土应力应变本构模型。模型尝试运用电阻率不规则因子来表征和测定土样的扰动变量,从而克服了传统扰动变量获取方法的不足,使之简便、快捷、经济、实用。另外,模型中,增加了土体体应变对土体扰动影响,且以试验和理论为依据建立扰动函数,从而使得模型更加符合土体实际工程力学特性。模型形式相对简单,参数易于确定。三轴排水剪切试验的验证结果表明,所构建的模型能较为合理地模拟结构性软黏土受荷扰动下的变形过程。
Based on the concept of disturbance state, a stress-strain constitutive model of soft clay considering the influence of soil structure was established. The model attempts to use the irregularity factor of resistivity to characterize and measure the disturbance variables of soil samples, thus overcoming the shortcomings of traditional disturbance variable acquisition methods, making them simple, rapid, economical and practical. In addition, in the model, the influence of soil body strain on soil disturbance is increased, and the disturbance function is established on the basis of experiment and theory, which makes the model more in line with the actual engineering mechanical properties of soil. The form of the model is relatively simple and the parameters are easy to determine. The test results of triaxial drainage shear test show that the model can simulate the deformation process of structural soft clay under perturbation.