%0 Journal Article
%A ZHANG Qiao-yan
%A TANG Li-xia
%A PAN Lu
%A HUANG Tong-li
%A CHEN Long
%T Mechanical  Properties of Shrubs and Applicability of Model WU in Karst Area
%D 2020
%R 10.11988/ckyyb.20190480
%J Journal of Yangtze River Scientific Research Institute
%P 53-58
%V 37
%N 12
%X The mechanical properties(tensile and shear properties) of roots are pivotal factors affecting the soil and water conservation. The roots of <i>Indigofera amblyantha Craib</i> and <i>Cassia bicapsularis Linn </i>were selected to research the mechanics of slope protection in Karst area. The relationship between the roots’ tensile strength and the shear characteristics of soil-root composite was investigated through indoor tensile test on single root and direct shear test on soil-root composite. The applicability of model WU in Karst area was also analyzed. Results indicated that tensile strength declined overall with the increasing of root diameter; however, such trend differs corresponding to different plant types. The shear characteristic of soil-root composite was jointly affected by tensile strength and friction between soil and roots, of which the former had larger influence; the shear characteristic with thin root and thick root together was better. Modified model WU is applicable to Karst area; but the modification coefficient varies corresponding to different plants. The research findings would lay a good foundation for the ecological restoration and selection and allocation of tree species in Karst area.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20190480