【摘要】 本文根据大量土样的三轴排水试验得到上海各主要土层的邓肯—张模型参数,讨论了模型参数的取值特点和变化规律。试验结果表明,粘土的k值明显小于砂土,但粘土的kur/k要大于砂土,粘土的kur/k在4~10之间,砂土的kur/k在2~7之间;k与φ具有明显的相关关系,k随φ近似按指数曲线变化;破坏比Rf的取值多在0.70~0.85之间;nur/n与n没有明显的关系,n值大多在0.5~1.0之间。更多还原

【Abstract】 Many soil samples were acquired from different hydrostratigraphic units in Shanghai City.Drained consolidated triaxial tests were performed.Based on the tests,the parameters in Duncan-Chang model for the units in Shanghai City have been obtained and the change in the parameters has been discussed.The test results indicate that the value of k for clays is smaller than that for sands,whereas the value of k_ur/k for clays is greater than that for sands.The value of k_ur/k range within 4～10 for clays and 2～7 for sands.The value of k is closely related to the value of internal friction angle φ and increases with φ in exponential function approximately.The failure ratio R_f often changes between 0.70 and 0.85.And n_ur/n is nearly not related to n and n often changes within 0.5～1.0.更多还原