草根加筋土的护坡机理及强度准则试验研究  

Experiment investigation on reinforcement mechanism and strength criterion of grassroots reinforced soils

作　　者：陈昌富[1] 刘怀星[1] 李亚平[1] 

机构地区：[1]湖南大学岩土工程研究所,湖南长沙410082

出　　处：《中南公路工程》2006年第2期14-17,共4页Central South Highway Engineering

基　　金：教育部高校博点基金(20050532021);湖南省科技攻关项目(03GKY3129)

摘　　要：采用室内试验方法研究了草根加筋土护坡加筋原理,试验结果表明其加筋机理可以用准粘聚力原理来解释;通过对准粘聚力的实测结果进行分析研究,提出了加筋粘性土的准粘聚力计算方法;利用莫尔-库仑准则对草根加筋土试验结果的强度包线进行拟合发现效果良好,说明草根加筋土服从莫尔—库仑准则。研究结果对于深入认识植被护坡机理和合理确定草根土的抗剪强度具有指导意义。Laboratory tests were carried out in order to understand the reinforcement mechanism of grassroots-reinforced soils （GRS）. The laboratory test results show that the reinforcement mechanism of GRS follows pseudo-cohesion principle and the calculation method of pseudo-cohesion for reinforced clayey soils has been presented through investigating the measured data of GRS. In addition, it can obtain a very high correla tion coefficient utilizing Mohr-Coulomb relation to fit the measured results of GRS. This means that the strength envelope of GRS follows Mohr-Coulomb criterion. The research results are of importance for under standing the mechanism of vegetation protection for slopes and determining the shear strength of GRS.

关 键 词：三轴压缩试验 草根 加筋土 准粘聚力原理 莫尔-库仑准则 

分 类 号：TU443[建筑科学—岩土工程]