长江科学院院报2016，Vol.33Issue(6)：24-28,5.DOI:10.11988/ckyyb.20150201
水平荷载作用下多花木蓝根系拉拔试验研究
Pull-out Test of Indigofera amblyantha Craib Root under Horizontal Load
摘要
Abstract
In order to explore factors influencing the shrub plant roots and soil interface friction, we carried out the direct pull⁃out test on Indigofera Amblyantha Craib root to study its anti⁃pullout force under different soil dry densi⁃ties. The results show that:(1) the curves of anti⁃pullout force vs. displacement of the roots can be divided into three phases of steep rise, steep fall and gentle decline, increasing linearly to peak value at the start phase, and then presenting non⁃linear trend;(2) the maximum anti⁃pullout force of Indigofera Amblyantha Craib root increases obviously linearly with the increasing of root diameter under the same soil dry density, and the coefficient of correla⁃tion reaches 0.9;(3) the maximum anti⁃pullout force of Indigofera Amblyantha Craib root increases with the in⁃creasing of soil dry density with given root diameter, and the modes of pull⁃out failure of all roots are friction failure when the soil dry density varies from 1.35 g/cm3 to 1.45 g/cm3 and 1.55 g/cm3, while when the density is 1.65 g/cm3 , root diameter of 0.586 mm is the critical point from friction failure to tensile failure, which means that the pull out failure mode is tensile failure when the root diameter is less than 0.586 mm, and friction failure when the root diameter is larger than 0.586 mm. Therefore, root diameter and unit weight of soil have influence on the anti⁃pullout force of root⁃soil interface.关键词
固土机理/根-土界面/拉拔试验/抗拉拔力/土壤密度Key words
principle of soil fixation/root-soil interface/pull-out test/anti-pullout force/soil density分类
建筑与水利引用本文复制引用
管世烽,夏振尧,张伦,胡文静,张守德,许文年..水平荷载作用下多花木蓝根系拉拔试验研究[J].长江科学院院报,2016,33(6):24-28,5.基金项目
国家自然科学基金项目（51278281，41202250）；国家科技支撑计划资助项目 （）
