Experimental and theoretical study of mechanical properties of root-soil interface for slope protection

作     者：SU Li-jun HU Bing-li XIE Qi-jun YU Fang-wei ZHANG Chong-lei SU Li-jun;HU Bing-li;XIE Qi-jun;YU Fang-wei;ZHANG Chong-lei

作者机构：Key Laboratory of Mountain Hazards and Earth Surface ProcessInstitute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China CAS Center for Excellence in Tibetan Plateau Earth SciencesBeijing 100101China China-Pakistan joint Research Center on Earth SciencesIslamabadPakistan University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2020年第17卷第11期

页      面：2784-2795页

核心收录：

学科分类：08[工学] 080104[工学-工程力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially supported by the National Natural Science Foundation of China(41790432) the NSFC-ICIMOD joint project(41761144077) the“Belt&Road”international cooperation team project of CAS(Su Li-jun) 

主　　题：Ecological slope-protection Anchoring force Pullout experiment Pullout model Model prediction 

摘      要：Plant roots mechanically enhance the strength of soil and improve slope stability through *** the popularization of ecological slope-protection technology,a quantitative study of how roots help to anchor soil is highly *** object of the present study is thus to investigate how roots and soil combine to affect the mechanical properties of the root-soil *** this end,pullout experiments of cedar roots of different diameters in soils of different density were *** experimental results show that the maximum pullout force increases significantly with increasing root diameter,but only slightly increases with increasing soil density,which indicates that the root diameter has a greater impact on the maximum pullout force than soil ***,based on studies of fiber-reinforced composites,a root-soil pull-out model was proposed to study the evolution of shear stress on root-soil *** approach ensures that the model accurately reflects the dynamic stress distribution evolution at the root-soil interface and can calculate the pullout process of embedded root from *** accuracy of the model is verified by comparing the calculated results with experimental ***,how soil density and root diameter affect the anchoring force was *** results indicate that the maximum anchoring force increases linearly with increasing root diameter,but nonlinearly with increasing soil density until reaching a fixed *** results show that the root soil pull-out model has significant practical value in slope protection.