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土体的结构是其强度、变形的内在决定因素,黄土的结构性由黄土颗粒之间的联结结构强度和摩擦结构强度所决定。由此,提出了基于强度条件的黄土静力结构性参数即联结结构静力强度势参数m1ε、摩擦结构静力强度势参数mε2以及结构静力强度势参数mε,并通过黄土的三轴试验研究了原状黄土和人工水泥结构性黄土的结构性及基于强度条件的黄土静力结构性参数的变化规律,揭示了含水率、围压、轴向变形对原状黄土和水泥人工结构性黄土结构性的影响。结果表明,原状黄土的含水率越小,其结构性越强,结构破坏后土体强度损失越大;黄土结构的损伤破坏主要发生在小应变阶段。并对所提出的基于强度条件的黄土静力结构性参数的合理性进行了讨论。
The structure of soil is the inherent determinant of its strength and deformation. The structure of loess is determined by the strength of the joint structure and the strength of friction structure of the loess. Therefore, the static structural parameters of loess, that is, the static strength potential parameter m1ε, the static structural friction potential parameter mε2 and the structural static strength potential parameter mε, are proposed based on the strength conditions. Based on the triaxial test of loess The structural regularity of intact loess and artificial cement structural loess and the variation law of static structural parameters of loess based on the strength conditions are revealed. The results show that the structural parameters of undisturbed loess and cement artificial loess are as follows: water content, confining pressure and axial deformation influences. The results show that the smaller the water content of intact loess, the stronger its structure and the greater the loss of soil strength after the structural failure. The damage and damage of the loess structure mainly occur in the small strain stage. The reasonableness of the proposed static structural parameters of loess based on the strength conditions is also discussed.