干密度对黄土邓肯-张模型参数的影响

为研究黄土的工程力学特性,对土样进行不同初始条件的室内三轴试验。将试验结果用邓肯-张模型进行拟合分析,获得了太原地区黄土的邓肯-张模型参数及其随干密度变化的规律。结果表明,随着干密度增大,黄土的抗剪强度、黏聚力和内部摩擦角都有增大趋势,切线弹性模量和体积变形模量迅速增加,初始干密度大的试样表现出剪胀和应变软化现象。试验所得参数可供黄土地区工程设计参考。

Dry Density's Influence on Loess's Parameters of Duncan-Chang Model

In order to study the engineering mechanics characteristics of loess,indoor triaxial tests of sample were done under different initial conditions,then the fit analysis on the test results were made by using Duncan-Chang model,from which the law of Duncan-Chang model parameters changes with the dry density of Loess in Taiyuan were drawn.The results show that,with the increase of dry density,the shear strength,cohesion and internal friction angle of loess are increasing,the tangent elastic modulus and size de...