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为研究湿陷性黄土的增湿力学特性以减少或避免黄土地区的工程灾害和事故,在不同围压下对不同含水率土样进行了固结不排水剪切试验,对湿陷性黄土在增湿条件下的偏应力-应变特性、抗剪强度特性进行了探究,发现含水率和围压对土的力学特性影响较大,且黏聚力与含水率的相关性远高于内摩擦角与含水率的相关性。采用邓肯提出的双曲线模型和刘祖典提出的幂函数模型分别模拟试样的软化和硬化特性,对比可知建立的模型在某种程度上能够反映湿陷性黄土的增湿力学特性。
In order to study the wetting mechanics characteristics of collapsible loess so as to reduce or avoid engineering disasters and accidents in loess areas, consolidation and undrained shear tests were conducted under different confining pressures on collapsible loess The results show that moisture content and confining pressure have great influence on the mechanical properties of soil, and the correlation between cohesion and water content is much higher than the internal friction angle Correlation with moisture content. By using the hyperbolic model proposed by Duncan and the power function model proposed by Liu Zudian, the softening and hardening properties of the sample are simulated respectively. The comparison shows that the model can reflect the wetting mechanical properties of collapsible loess to some extent.