土的应力状态和基于Mohr-Coulomb准则的结构性模型
[Abstract]:In order to establish the structural model of undisturbed soil, the initial stress of the soil and its role in the formation of soil material were studied, and the applicability of the conventional Mohr-Coulomb criterion was analyzed. Based on the objective reality that many properties of soil depend on its specific structure and ultimately depend on the corresponding initial stress, the concept of loading ratio is given. The modified Mohr-Coulomb strength yield criterion which can reflect the initial stress and the incremental stress is established. On this basis, the anisotropic yield models of two kinds of structural soils, Pisa soft clay and Jiuzhou pozzolanic sand method, are presented. The results show that the modified Mohr-Coulomb yield criterion based on initial stress and incremental stress takes the initial stress line instead of the isoclinic line as the axis, and the modified criterion can reasonably reflect the structure and anisotropy of the undisturbed soil, and it is in good agreement with the experimental results.
【作者单位】: 河南大学土木建筑学院;新乡学院土木工程与建筑学院;
【基金】:国家自然科学基金项目(51178290,41472253) 岩土力学与工程国家重点实验室开放基金项目(Z013002)
【分类号】:U412.22
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