水力作用下贵州红黏土基本物理力学特性试验研究

Experimental study on the basic physical and mechanical properties of Guizhou red clay under hydraulic action

为了深入了解贵州红黏土的物理力学特性及其相应机理,对通过物理特性试验、直剪试验对贵州地区红黏土的基本物理力学特性进行了研究。研究结果表明贵州红黏土具有典型的反剖面特性,红黏土强度的发挥很大程度上依赖于粒间较强的铁质胶结;随着含水率的增大,红黏土强度指标呈现有规律的递减趋势;随着深度的增加,红黏土的强度呈现先增大后减小的趋势,呈现明显不同于其他土类的性质。通过研究,旨在为红黏土地区的工程设计和建设提供科学依据。

In order to gain a deeper understanding of the physical and mechanical properties and corresponding mechanisms of Guizhou red clay,this paper investigates the basic physical and mechanical properties of Guizhou red clay through physical property tests and direct shear tests.The research results indicate that Guizhou red clay has typical anti profile characteristics,and the strength of red clay largely depends on the strong iron cementation between particles;as the moisture content increases,the strength index of red clay shows a regular decreasing trend;as the depth increases,the strength of red clay shows a trend of first increasing and then decreasing,showing distinct properties from other soil types.Through this study,the aim is to provide scientific basis for engineering design and construction in red clay areas.