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湿陷性是造成黄土路基沉降的重要原因。如何定量评价湿陷性对黄土路基的影响程度,是黄土路基工程和研究中的重要问题。由于黄土的特殊性,目前常用的数值分析软件都不带有湿陷性黄土的本构模型。本文基于黄土增湿等效压力的思想,把黄土湿陷变形转化为FLAC3D中单元体的加载变形,利用简单的本构关系,对这一问题进行解答。
Collapsibility is an important reason for the settlement of loess roadbed. How to quantitatively evaluate the influence of collapsibility on loess subgrade is an important issue in the engineering and research of loess subgrade. Due to the particularity of loess, the commonly used numerical analysis software does not have the constitutive model of collapsible loess. Based on the idea of humidification equivalent pressure of loess, this paper transforms the deformation of the loess collapsible into the loading deformation of the unit body in FLAC3D. The simple constitutive relation is used to answer this question.