岩土工程学报2016，Vol.38Issue(11)：2107-2113,7.DOI:10.11779/CJGE201611022
根系作用下的基材土-岩接触面原位剪切试验研究
In-situ shear tests on base material soil-rock interface interacted by roots
摘要
Abstract
The shear characteristics of base material soil-rock interface are studied by means of in-situ shear tests by using the homemade shear apparatus under various interfacial roughnesses and root densities of Indigofera amblyantha. The test results reveal that the shear stress-displacement of the base material soil-rock interface is characterized by typical shear softening. Under the reinforced effect of roots on base material soil and its anchorage effect on soil-rock interface in the tests, the rooted samples exhibit rough fractured shear failure plane. The contribution of roots to improving the interfacial peak shear strength, peak shear displacement and residual shear strength is significant. According to the comparison, it is found that the contribution differences are small for the same root area ratio (RAR) to improving the intrfacial peak shear strength under different roughnesses. For a small RAR, the contribution ratio of roots is lower than that of interfacial roughness. As RAR increases, however, the effect of roots on improving the interfacial peak shear strength is more obvious, the contribution ratio of roots thus increases significantly.关键词
生态护坡基材/土-岩接触面/原位剪切试验/根系/剪切软化Key words
base material for ecological slope protection/soil-rock interface/in-situ shear test/root/shear softening分类
建筑与水利引用本文复制引用
丁瑜,夏振尧,许文年,杨奇..根系作用下的基材土-岩接触面原位剪切试验研究[J].岩土工程学报,2016,38(11):2107-2113,7.基金项目
国家自然科学基金项目（41202250，51409150）；湖北省教育厅优秀中青年科技创新团队计划项目（T201304）；三峡库区生态环境教育部工程研究中心开放基金项目 （）
