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本文根据伊留申(A.A.Ilyushin)的形变理论,以单一广义应力-应变曲线的割线模量为基础,建立了黄土的应力-应变全量本构关系和黄土地基沉降量计算公式。公式较全面地反映了地基变形中的体变、形变部分和应力路径及非线性的影响,可适用于不同形式(如理想型和软化型等)应力-应变曲线。公式计算的地基的荷载-沉降(P～S)曲线与几个场地的现场试验的实测值基本吻合。
Based on the deformation theory of A.A. Ilyushin and the secant modulus of a single generalized stress-strain curve, this paper establishes the stress-strain constitutive relation of loess and the calculation formula for the settlement of loess foundation. The formula more comprehensively reflects the effects of volumetric deformation, deformation, stress path and nonlinearity in ground deformation, and can be applied to stress-strain curves of different types (such as ideal type, softening type, etc.). The load-settlement (P~S) curve of the foundation calculated by the formula is basically consistent with the measured values of field tests at several sites.