华中科技大学学报（自然科学版）Issue(8)：109-113,5.DOI:10.13245/j.hust.140822
多花木兰根系抗拉特性及边坡稳定性分析
Tensile properties of Magnolia Multiflora′s roots and slope stability analysis
摘要
Abstract
The tensile tests indoors were conducted targeted roots of Magnolia Multiflora ,a typical slope plant .On the assumption that the sliding surface was parallel to the slope ,the formula of slope stability coefficient was deduced .The tension ,tensile strength and modulus of roots and the stability of the slope were researched on different gradients .The results show that the tensile force of Magnoli-a Multiflora′s roots increase with diameter increasing according to a power function .Their tensile strength is between 21 .15 to 76 .08 MPa ,which decreases with diameter increasing according to a power function .The larger the gradient ,the greater are the roots′ tensile force and tensile strength with the same diameter .Roots'modulus is between 0 .64 to 2 .33 GPa ,which reduce gradually along with the increase of roots′diameter .The rate of the decrease is sharp when the diameter is between 1 .2 and 2 .2 mm ,that is slower in other cases .The slope stability coefficient is positively associated with roots′tensile force ,negative correlation with the slope gradient ,and influenced by many factors , such as roots′growth direction and density ,plants′planting density and soil′s properties .The slope stability coefficient increases linearly with the increase of root diameter .关键词
护坡/根系/抗拉力/抗拉强度/弹性模量/稳定系数Key words
slope protection/roots/tensile force/tensile strength/modulus/stability coefficient分类
建筑与水利引用本文复制引用
万娟,肖衡林,何俊..多花木兰根系抗拉特性及边坡稳定性分析[J].华中科技大学学报（自然科学版）,2014,(8):109-113,5.基金项目
国家自然科学基金资助项目（51178166）；2012年湖北省科技厅创新群体项目（2012FFA035）；教育部新世纪优秀人才支持计划资助项目（NCET-11-0962）． （）
