摘要
为研究植被根系对弱膨胀土渗透性的影响,通过不同含根量密度的弱膨胀土试样的变水头渗透试验,分析弱膨胀土试样渗透性随含根量变化的规律,并应用SEEP/W软件对降雨引起的边坡不同位置处的体积含水量进行分析。研究结果表明:香根草根系含根量密度越大,试样在标准温度下的渗透系数也越大;降雨阶段,体积含水量的升高幅度与含根量和高程成正比;降雨停止后,体积含水量的降低速度与含根量成反比,降低幅度与高程成正比。
In order to study the influence of vegetation roots on the permeability of weak expansive soil,through variable head permeability tests of weak expansive soil samples with different root content densities,the law of permeability of weak expansive soil samples changing with root content is analyzed,and use SEEP/W software to analyze the volumetric water content at different positions of the slope caused by rainfall.The result shows:the permeability coefficient of the sample at standard temperature will also increase When the root density of the vetiver root system increases.The greater the permeability coefficient of the sample at standard temperature.During the rain period,the increase in volumetric water content is proportional to the root content and elevation.After the rain stopped,after the rainfall ceases,the rate of decrease of the volumetric water content is inversely proportional to the root content,and the rate of decrease is proportional to the elevation.
作者
陶坚
王桂尧
常婧美
黄永刚
邓鹏
赵亚
TAO Jian;WANG Gui-yao;CHANG Jing-mei;HUANG Yong-gang;DENG Peng;ZHAO Ya(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Branch 5,First Engineering Bureau,China Communications Construction Corporation,Beijing,100024,China;School of Management,Hunan Information University,Changsha 410151,China)
出处
《交通科学与工程》
2020年第4期10-16,共7页
Journal of Transport Science and Engineering
基金
国家自然科学基金资助项目(51578082)
湖南省教育厅科学研究项目资助(18C1578)
长沙理工大学研究生科研创新项目(CX2020SS25)。
关键词
弱膨胀土
香根草
渗透特性
体积含水量
weakly expansive soil
vetiver
permeability characteristic
volumetric moisture content
