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土的本构模型是研究其力学特性的核心问题,邓肯-张双曲线模型能较好地反映土体的非线性性态,概念清楚,易于理解,在岩土工程和地下工程的数值分析中得到广泛应用。本文通过三轴固结排水试验,分析不同围压下粉土应力应变曲线的特点,得到不同含水率粉土的邓肯-张模型参数。并通过分析由不同含水率粉土的邓肯-张模型参数构成曲线的变化特征,归纳了不同含水率粉土邓肯-张模型各参数的变化规律,为工程设计、计算提供一定的参考价值。
The constitutive model of soil is the core issue to study its mechanical properties. The Duncan-Chang hyperbola model can well reflect the nonlinear behavior of soil so that its concept is clear and easy to understand. In the numerical analysis of geotechnical and underground engineering Be widely used. In this paper, the characteristics of stress-strain curves of silt under different confining pressures are analyzed by the triaxial consolidation drainage test, and the Duncan-Chang model parameters of the silts with different water contents are obtained. By analyzing the characteristics of the curves of Duncan - Chang model with different water contents, the variation rules of parameters of Duncan - Chang model for silt with different water contents are summarized, which will provide certain reference value for engineering design and calculation.