黏粒含量对黏性土渗透性影响的试验研究

发布时间：2018-01-30 11:30

本文关键词： 黏粒含量黏性土渗透系数塑性指数颗粒级配　出处：《科学技术与工程》2017年30期 　论文类型：期刊论文

【摘要】：渗透性是土体的重要工程性质之一,在诸如垃圾填埋场防污、水利大坝防渗、基坑支护防漏等工程项目中,运用各种方法提高土体的抗渗性是施工的最终目的。基于此,制备不同黏粒含量的黏性土试样;并开展渗透及相关试验,以分析黏粒含量对渗透性的影响。试验结果表明随着黏粒含量的增加,黏性土的塑性指数呈线性增加,而渗透系数呈非线性减小,可用指数函数式拟合。另外,颗分曲线显示高黏粒含量试样的不均匀系数变小,其堆积方式以小粒径颗粒接触为主,孔隙通道直径小,易出现不连通孔隙,导致渗透系数减小,所得成果可供工程实践参考。
[Abstract]:Permeability is one of the important engineering properties of soil, in such engineering projects as landfill site antifouling, water conservancy dam seepage prevention, foundation pit support and leakage prevention and so on. The ultimate purpose of construction is to improve the impermeability of soil by various methods. Based on this, the clay samples with different clay content are prepared. Permeability and related experiments were carried out to analyze the effect of clay content on permeability. The results showed that the plasticity index of clay increased linearly and the permeability coefficient decreased linearly with the increase of clay content. It can be fitted by exponential function. In addition, the particle curve shows that the non-uniform coefficient of the sample with high viscosity content becomes smaller, the stacking mode is mainly small particle contact, the diameter of pore channel is small, and the disconnected pore is easy to appear. As a result, the permeability coefficient is reduced, and the obtained results can be used for reference in engineering practice.
【作者单位】：南京工业大学数理科学学院;
【基金】：江苏省博士后基金(1302012A)资助
【分类号】：TU442
【正文快照】： 引用格式:付磊,闫迪,黄强,等.黏粒含量对黏性土渗透性影响的试验研究[J].科学技术与工程,2017,17(30):280—284Fu Lei,Yan Di,Huang Qiang,et al.Experimental study on effect ofclay content on permeability of clayey soil[J].Science Technology andEngineering,2017,17(

【相似文献】