Abstract：Systematical testing studies on 8 kinds of materials for a high embankment dam whose maximum height is 258 m are performed. Stress-strain-strength characteristics of them in high stress conditions are analyzed through large triaxial tests. The results show that cohesion c of embankment materials does exist，which contradicts the routine idea c = 0. The value of c is suggested for this project. And the results show that shear strength characteristics are obviously nonlinear and deformation properties are harmonious. According to original physical meaning of Duncan-Chang model，an improved method for determining strength parameters is introduced，which involves a and b. Different figures are drawn in different axis strains a，and a or initial modulus Ei is obtained according to the possible minimum value of a，whereas b is gained from a bigger range of a. Since basic physical meaning of a and b are thoroughly different，the improved method overcomes the defect of routine method which obtains the two parameters on the same line. According to different coordinate scales，different parameters including a and b，and corresponding Ei，k，n and Rf of Duncan-Chang model are gained. Suggested parameters are proposed in comparison with constitutive parameters by routine method and they are proved to be reliable by data fitting.
张 茹 何昌荣 费文平 陈 群. 高土石坝筑坝料本构模型参数研究[J]. 岩石力学与工程学报, 2004, 23(S1): 4428-4434.
Zhang Ru，He Changrong，Fei Wenping，Chen Qun. Study on parameters of constitutive model of materials of a high embankment dam. , 2004, 23(S1): 4428-4434.
2004, Vol. 23 
