黄土及其边坡稳定的一些探讨

Exploration on the Loess and the Stability of Slope

研究目的:通过观察黄土的一些自然特征,探讨水对黄土的作用方式,分析黄土边坡坡度与水之间的作用关系,以便工程边坡设计时充分考虑水对边坡稳定的作用,安全合理地确定边坡坡率和防护措施。研究结论:黄土的结构强度和抗剪强度对水极其敏感,抗剪强度中粘聚力随含水量的增加而迅速降低;边坡稳定取决于能否形成坡面浸润带,浸润带的强度随含水量的增加而迅速减小;高角度针状孔隙的存在是黄土直立性的本质所在;稳定的自然黄土边坡和窑洞边坡是物竞天择的科学选择,值得我们借鉴。

Research purposes：Based on observating some natural characteristics of loess,the effect of water was discussed and relationship between loess slope and effect of water was analyszed,so that influence of water to slope stability was fully considered and slope ratio and safeguard procedures was designed safely and reasonably when engineering slope was to designed. Research conclusions：The structure strength and the shear strength of loess was extremely sensitive to the water.The of cohesion of shear strength was quikly reduced as moisture content increased.Slope stability depended on whether the seepage belt was formed in the slope surface which strength was promptly decreased as water content increasing.The needle pore determined the loess up-right.The stable natural slope of loess and caves were the scientific choices.