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K-G模型较之E-μ模型有较好的优越性,每个参数都能与土的剪切模量或体变模量直接联系,便于岩土工程的非线性理论和计算分析。以西部甘肃永登非饱和黄土为研究对象,进行大量不同湿度下的非饱和黄土常规三轴试验,获得不同初始饱和度下的K-G模型参数,进一步研究这些参数随初始饱和度的变化规律,建立模型参数和初始饱和度的相关表达式。在实际工程中,用测得的非饱和黄土的湿度指标,就可以得到黄土的K-G模型参数进行非饱和黄土的增湿数值模拟计算分析,避免吸力的量测和计算,具有一定的工程实际应用价值。
The K-G model has better advantages than the E-μ model. Each parameter can be directly related to the shear modulus or bulk modulus of soil, which is convenient for the nonlinear theory and calculation analysis of geotechnical engineering. Taking the non-saturated loess of Yongden in Gansu as an example, a large number of conventional triaxial tests of unsaturated loess at different humidities were carried out to obtain KG model parameters under different initial saturations. The variation rules of these parameters with initial saturation were also established Correlation expressions for model parameters and initial saturation. In practical engineering, using the measured moisture index of unsaturated loess, KG model parameters of loess can be obtained for numerical simulation of humidification of unsaturated loess to avoid the measurement and calculation of suction, which has some practical application value.