| 泥石流堆积物中细颗粒含量与渗透系数关系试验研究 |
| |
| 引用本文： | 杨进兵,陈兴长,汪 惠,田小平,贾利蓉.泥石流堆积物中细颗粒含量与渗透系数关系试验研究[J].岩土力学,2016,37(11):3184-3190. |
| |
| 作者姓名： | 杨进兵 陈兴长 汪 惠 田小平 贾利蓉 |
| |
| 作者单位： | 西南科技大学 环境与资源学院 四川 绵阳 621010 |
| |
| 基金项目： | 国家自然科学基金面上项目（No. 41372301）；国家科技支撑计划项目（No. 2012BAC06B02）；西南科技大学研究生创新基金（No. 15ycx036）。 |
| |
| 摘 要： | 泥石流拦砂坝通常建造在沟床堆积物上。泥石流堆积物的渗透性是影响坝底扬压力的关键因素。目前关于土体渗透性的研究主要集中于无黏性粗粒土，对泥石流堆积物这种宽级配土体渗透性的研究比较缺乏。选择北川县泥石流沟床堆积物作为试验材料，通过渗透试验，确定了影响宽级配土渗透性的细颗粒上限粒径；在此基础上，通过试验研究了细颗粒含量与渗透系数的关系。结果表明，泥石流堆积物中粗颗粒仅起骨架作用，细颗粒才是决定其渗透性能的关键；显著影响宽级配土渗透性的细颗粒上限粒径为0.1 mm；细颗粒（<0.1 mm）含量与渗透系数呈负指数关系，并且当细颗粒含量超过20%以后，泥石流堆积土的渗透性趋于稳定。
|
| 关 键 词： | 泥石流 宽级配土 细粒土 渗透系数 |
| 收稿时间： | 2015-02-02 |
An experimental study of relationship between fine grain content and permeability coefficient of debris flow deposits |
| |
| YANG Jin-bing,CHEN Xing-zhang,WANG Hui,TIAN Xiao-ping,JIA Li-rong.An experimental study of relationship between fine grain content and permeability coefficient of debris flow deposits[J].Rock and Soil Mechanics,2016,37(11):3184-3190. |
| |
| Authors: | YANG Jin-bing CHEN Xing-zhang WANG Hui TIAN Xiao-ping JIA Li-rong |
| |
| Institution: | School of Environment and Resources, Southwest University of Science and Technology, Mianyang. Sichuan 621010, China |
| |
| Abstract: | The permeability of debris flow deposit, if served as a foundation of check dam, is vital to forming uplift pressure on dam base. Current researches on soil permeability are focused on cohesionless coarse-grained soils and few on wide graded gravelly soils, such as debris flow deposits. The upper limit particle size of the fine particle affecting the permeability of wide graded gravelly soil is determined by the permeability test on the debris flow deposit in Beichuan county, Sichuan Province of China. The relationships between fine-grained soil content and permeability coefficient are also obtained. The results show the coarse particles only play a skeleton role, and the fine particles dominate the permeability of debris flow deposits. The upper limit particle size of 0.1 mm has significant influence on the permeability of wide graded gravelly soil. The content of fine particles (<0.1 mm) has a negative exponential relationship with the permeability coefficient, and the permeability of debris flow deposits tends to be stable when the fine particle content is more than 20%. |
| |
| Keywords: | debris flow wide graded gravelly soil fine-grained soil permeability coefficient |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
