黄土地基变形计算的形变法

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。

DEFORMATION METHOD IN THE CALCULATING SETTLEMENT OF LOESS FOUNDATION

This paper based on the deformative theory established by Ilyushin A. A. and secant shearing and volumetric modulus of simple extensive stress-strain curve, as the strain parameters, a total stress-strain relationship and subsident formular for loess foundation are presented. They have considered nonlinear of deformation of soil, volumetric change, the change of shape and stress path under action of external loads. This formular can also be used for different types of stress-strain curves. The subsidence-load (S-P) curves of loess foundation calculated by using this formuls has been obtained. It is found that the computed S-P curves for various are agreeted well with the results of several project in site testing.