水土保持研究2012，Vol.19Issue(3)：114-118,5.
人工石质边坡构树根系抗剪特性研究
Study on Characteristics of Root Shear of Broussonetia papyrifera L. on Rocky-steep Slope
摘要
Abstract
In order to investigate how Broussonetia papyrifera L. root shearing characteristics varied with root diameter, growth direction and lateral order, shearing forces of these samples were measured by an electronic universal testing machine. Relationships between growth direction, lateral order and shear characteristics were analyzed systematically. The results showed that both root amount and average diameter of downslope were larger than those of upslope, while the average length of upslope was larger than that of downslope. Force-displacement curves of roots with different orders, root diameters, growth directions had the similar shapes, shear force of the 1st order was larger than the 2nd-order＇s. Maximum shear force in- creased with increase of root diameter. Linear relationship between shear strength and diameter was observed, shear strengths decreased with increase of diameters. There were no significant differences of shear strength which were observed among the lst-order, 2nd order, 3rd-order laterals of downslope, although the rank was lst-order〉2nd-order〉3rd-order; and no significant differences of shear strength between upslope and downslope were observed. Shear strength is key factor affecting the stability of slope. In all, downslope roots with the 1st order and 2hal-order maintained the slope soil shearing properties.关键词
石质陡边坡/抗剪强度/根系分级/剪切力Key words
rocky steep slope/shear strength/lateral order/shear force分类
农业科技引用本文复制引用
王云翔,孙海龙,罗龙皂,李绍才,罗双,卢荻秋,龙凤,刘冲..人工石质边坡构树根系抗剪特性研究[J].水土保持研究,2012,19(3):114-118,5.基金项目
国家自然科学基金“基于岩体裂隙及植物适应的根系锚固模型研究” （）
