三叶草根—土复合体抗剪切强度试验研究  

Experimental Study on Shear Strength of Trifolium Root-in-soil

作　　者：方便 罗海波[1] 魏华炜[1] 

机构地区：[1]贵州大学资源与环境工程学院,贵州贵阳550003 [2]瓮福(集团)有限责任公司,贵州贵阳550005

出　　处：《贵州大学学报（自然科学版）》2012年第2期29-32,共4页Journal of Guizhou University:Natural Sciences

基　　金：贵州省自然科学基金项目[黔科合J字(2007)2152]

摘　　要：本文以三叶草为样本,研究其含根量分别为0.0 g/60 cm3、0.1 g/60 cm3、0.3 g/60 cm3、0.5 g/60 cm3、0.7 g/60 cm3和1.0 g/60 cm3的根—土复合体抗剪切强度,试验中对三叶草根-土复合体进行了法向应力分别为100 kPa、200 kPa、300 kPa及400 kPa下的抗剪强度。结果表明:三叶草根系增加了土体的抗剪强度;根—土复合体在同一含根量下,其抗剪强度均随着法向应力的增加而增加;在同一法向应力下,随着含根量的增大,根—土复合体的抗剪强度、粘聚力和内摩擦角均呈现出先增大后减小的趋势,均在含根量为0.5 g/60 cm3时出现最大值。三叶草含根量为0.5-0.7 g/60 cm3时护坡效果最好。In this paper,the shear strength of Trifolium root-in-soil are studied under the root content of 0.0 g/60 cm3,0.1 g/60 cm3,0.3 g/60 cm3,0.5 g/60 cm3,0.7 g/60 cm3 and 1.0 g/60 cm3 and the normal stress of 100 kPa,200 kPa,300 kPa and 400 kPa,respectively.The results show that the root content increase the shear strength of root-in-soil,and under a same root content in root-in-soil the shear stress increase with the normal stress.However,the shear stress,cohesive stress and angle of internal fraction increase firstly and then decrease,the peaks of them all appear in the root content of 0.5 g/60 cm3.Therefore,the root content of 0.5-0.7 g/60 cm3 is the best value to protect slope stability.

关 键 词：生态护坡 抗剪强度 根—土复合体 含根量 三叶草 

分 类 号：P642[天文地球—工程地质学]