基于根系形态的根系固坡作用数值分析

Numerical analysis of the effects of roots on the slope reinforcement based on the roots forms

将土体、根系作为一个复合的整体,选择典型护坡植物夹竹桃为对象,利用非线性有限元计算方法研究在雨水侵蚀力和坡面径流侵蚀力作用下,不同分布密度和不同侧根数量的根系对边坡表层土体稳定性的影响。结果表明,在降雨条件下,植物根系的存在能有效提高边坡表层土体整体刚度,随着根系的侧根数量和植株分布密度的增大,边坡表层位移量逐渐减小,雨水对边坡表层土体的侵蚀也逐渐减小,从而使边坡表层土体稳定性提高。

Regarding the root soil composite as an integrated organism of soil and roots, this thesis selects a typical slope plant nerium indicum as the research object, and utilizes the non-linear finite numerical analytical method to study the effects of different roots distribution density and lateral roots amount on the stability of slope surface soil under the condi- tion of the rainfall and slope surface runoff erosions. The results showed that the existence of roots contributes substan- tially to the enhancement of the integral stiffness of the surface soil in a rainfall situation. It is indicated that the dis- placement of the slope surface and rainfall erosion on the surface soil are decreasing with the increase of distribution density and lateral roots amount, so that the surface stability can be reinforced.