期刊论文

Distribution Characteristics of Vetiver's Roots in Highway Slope

中文

应用基础与工程科学学报

1005-0930

2017

25

1

102-112

10.16058/j.issn.1005-0930.2017.01.010

工程流变学湖南省重点实验室开放课题基金项目（14HNKLER02）； 国家自然科学基金项目（51608545）； 湖南省外国专家局资助项目（湘财教指[2012]26号）；

本校为第一机构

模拟实际公路边坡坡度和土质条件,制作模型试验箱,并种植了根系发达的生态护坡植物---香根草.通过全断面开挖法,研究了在模型箱中生长了两年的香根草根系在边坡土体中的分布特征.结果表明:在贫瘠土壤条件下,两年生香根草的根系垂直向下生长,最大根长达1m多,其根系生物量沿土层剖面深度呈二项式函数关系减少;根系直径约为0.8 ~ 1.4mm,且根径> 1mm的根系居多,最粗者可达2.2mm;香根草根系的分布范围随土层深度呈先增大后减小的趋势,其分布规律可以用Gauss曲线来描述;沿土层剖面自上而下,根系密度分布规律服从Logistic曲线关系;香根草的大部分根系偏向坡脚方向生长,坡脚方向生长的根系粗长且密集,而...

An experimental study was carried out to investigate the distribution characteristics of vetiver roots in highway soil slope. Model boxes with simulated side slope and soil conditions of a practical project were constructed;and vetiver known for its stabilizing role on soil slope were planted in these model boxes. By using full face excavation method, the distribution characteristics of two-year-old vetiver roots in soil slope and the stabilizing effects of vetiver roots system on highway slope were focused on in this study. The test results indicated that, under poor soil conditions, vetiver ...