水文地质工程地质2017，Vol.44Issue(6)：64-69,6.DOI:10.16030/j.cnki.issn.1000-3665.2017.06.10
小乔木根系根土间作用力的室外拉拔试验研究
An outdoor drawing test study of the root soil interaction force for a small tree root system
摘要
Abstract
Small trees have a very high proportion in slope ecological protection.A study of the mechanism of slope protection and influence factors of a small tree root system are of important theoretical and practical significance for further improvement of the slope protection technology.On the basis of domestic and foreign research achievements,the influence of moisture content and root geometric parameters on the strengthening ability of slope soil is examined by the outdoor drawing experiment in red clay ground with the pinus elliottii root system.The results show that moisture content of the surface soil is greater than that in the deep soil after heavy rainfall condition and moisture content of the root soil is less than that in the nature soil.It is found that the small tree root system helps the water to infiltrate in the slope.The maximum drawing force increases first and then decreases with the increasing moisture content as the trend of the quadratic function;the maximum drawing force increases monotonically with the increasing root volume over all the performance,but when moisture content is 22％ and 24％,the maximum drawing force decreases first and then increases with the increasing root volume.The pullout force displacement curve fluctuates greatly under different volume or moisture content of the plant root.关键词
小乔木根系/根土间作用力/拉拔试验/雨水影响Key words
small tree root system/root soil interaction force/drawing test/rain affect分类
建筑与水利引用本文复制引用
王桂尧,胡圣辉,张永杰,陈曙,沙琳川,杨闻达..小乔木根系根土间作用力的室外拉拔试验研究[J].水文地质工程地质,2017,44(6):64-69,6.基金项目
国家自然科学基金项目资助(51178063,51578082) （51178063,51578082）
湖南省交通科技计划项目资助(201514) （201514）
