邓肯-张E-μ模型的改进

针对邓肯-张E-μ模型体变经验公式不能准确描述三轴剪切试验体积变形与轴向变形之间关系的问题,首先进行了粗粒土饱和样大型三轴剪切试验,并对试验结果进行了分析,提出了可以准确描述三轴剪切试验体积变形与轴向变形之间关系的体变经验公式,然后利用其他试验数据对该体变经验公式进行了验证,证明了该体变经验公式的通用性,最后基于该体变经验公式对邓肯-张E-μ模型进行了改进,提出了一种新的E-μ模型.

Improvement of Duncan-Chang E-μ model

Since the empirical formula of volumetric deformation of the Duncan-Chang E-μ model cannot accurately depict the relationship between the volumetric and axial deformation of the triaxial shear tests, large-scale triaxial shear tests on saturated samples of coarse-grained soils were carried out. The test results were analyzed. An empirical formula of volumetric deformation that can accurately depict the relationship between the volumetric and axial deformation of the triaxial shear tests was proposed. The proposed empirical formula was validated using other researchers' test data. Its universality was proved. Based on the proposed empirical formula of volumetric deformation, a new E-μ model that is an improvement of the Duncan-Chang E-μ model is presented.