土的應(yīng)力狀態(tài)和基于Mohr-Coulomb準(zhǔn)則的結(jié)構(gòu)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.
【作者單位】: 河南大學(xué)土木建筑學(xué)院;新鄉(xiāng)學(xué)院土木工程與建筑學(xué)院;
【基金】:國家自然科學(xué)基金項目(51178290,41472253) 巖土力學(xué)與工程國家重點實驗室開放基金項目(Z013002)
【分類號】:U412.22
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