Laboratory assessment of tensile properties of root-soil composite of Amorpha fruticose  

作　　者：TAO Gaoliang YANG Chuanhui CHEN Qingsheng NIMBALKAR Sanjay XIAO Henglin WANG Qing 

机构地区：[1]Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes,Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes,Ministry of Education,Hubei University of Technology,Wuhan 430068,China [2]School of Intelligent Construction,Wuchang University of Technology,Wuhan 430223,China [3]School of Civil and Environmental Engineering,University of Technology Sydney(UTS),Ultimo NSW 2007,Australia

出　　处：《Journal of Mountain Science》2025年第3期1062-1074,共13页山地科学学报(英文)

基　　金：The authors would like to acknowledge financial support from the Joint Funds of the National Nature Science Foundation of China(No.U22A20232);Supported by Open Project Funding of Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes,Ministry of Education(HGKFZ07);the National Natural Science Foundation of China(No.51978249);Innovation Research Team Project of the Hubei Provincial Department of Science and Technology(JCZRQT202500027);the International Collaborative Research Fund for Young Scholars in the Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes.

摘　　要：Plant root systems serve as a natural reinforcing material,significantly improving soil stability.Furthermore,the tensile strength of soil is crucial in mitigating the formation of cracks.Consequently,this study aims to investigate the influence of plant roots on the tensile strength of soil.For this investigation,Amorpha fruticose was selected due to its large root diameter and the ease of root extraction.Indoor tensile tests were conducted on individual roots and root-soil complexes under three varying factors.The results indicate a power law relationship between root diameter and tensile strength.Increased root content and dry density notably enhance the tensile strength of the root-soil complex while roots mitigate damage associated with soil brittleness.When root content increases from 0 to 10,the maximum enhancement in tensile strength of the root-soil complex reaches 42.3 kPa.The tensile strength of the root-soil complex at a dry density of 1.7 g/cm^(3)is four to five times greater than that of the complex at a dry density of 1.4 g/cm^(3).Moreover,as moisture content increases,the tensile strength of the root-soil complex initially rises before declining,with an increase range of 7.7-35.8 kPa.These findings provide a scientific basis for understanding the role of vegetation roots in soil tensile strength and for guiding slope reinforcement strategies.

关 键 词：Root soil complex Tensile strength Root content Dry density Moisture content 

分 类 号：S157.43[农业科学—土壤学] TU43[农业科学—农业基础科学]