| TDA黄土混合物的渗透性能研究 |
| |
| 引用本文： | 周锐,李星润,杨晓东,常宇涵,姬厚真,李朝晖.TDA黄土混合物的渗透性能研究[J].路基工程,2022,0(1):72-77. |
| |
| 作者姓名： | 周锐 李星润 杨晓东 常宇涵 姬厚真 李朝晖 |
| |
| 作者单位： | 西北民族大学土木工程学院，兰州 730100 |
| |
| 基金项目： | 西北民族大学国家级大学生创新创业训练项目计划资助项目（202010742082） |
| |
| 摘 要： | 对不同橡胶颗粒掺量的TDA黄土混合物进行变水头渗透试验，分析混合物以最大干密度配比时渗透系数的变化规律；研究TDA黄土混合物作为路基填料、渠道填料的水理特性。结果表明:随着时间增长，TDA黄土混合物的渗透系数逐渐减小，且变化幅度由剧烈趋于缓和；孔隙比对渗流作用影响与颗粒联通性、最小粒径有关；掺量小于20 %的混合物与素黄土渗透性质接近，而当掺量大于30 %后，黄土与橡胶颗粒契合度降低，渗透系数增长明显，呈指数变化模式；掺量为20 %～30 %时，渗透系数先减小后增大，防渗最佳掺量约为25 %。
|
| 关 键 词： | TDA黄土混合物 渗透性能 渗透系数 最大干密度 最佳掺量 |
| 收稿时间： | 2021-03-03 |
Research on Permeability of TDA Loess Mixture |
| |
| Abstract: | The variable head penetration tests on different content of rubber particles-loess mixture was carried out and the variation law of permeability coefficient with the maximum dry density ratio was analyzed. The hydraulic characteristics of TDA loess mixture as roadbed filler and channel filler were studied. The results show that with the increase of time, the permeability coefficient of TDA loess mixture gradually decreases, and the fluctuation of the change tends to be lessened from violent; the seepage effect affected by the void ratio is related to particle connectivity and minimum particle size; the permeability property of the mixture with the content of less than 20 % is similar to that of the plain loess, but when the content is greater than 30 %, the fit of the loess and rubber particles will decrease, and the permeability coefficient will increase significantly, showing an exponential change pattern. When the mixing amount is between 20 % ~ 30 %, the permeability coeffcient decreases first and then increases, there is an optimal anti-seepage mixing amount of about 25 % |
| |
| Keywords: | |
|
| 点击此处可从《路基工程》浏览原始摘要信息 |
|
点击此处可从《路基工程》下载全文 |
|
