植被根系浅层加筋作用对边坡稳定性的影响

Effect of shallow layer of vegetation root on slope stability

植被浅层加筋对边坡稳定性具有积极作用,本文研究了水平与竖向植物根系对边坡加固的影响.首先分析了植被护坡机理,重点对植被的浅层加筋效果进行分析;然后设计了一种能够考虑加筋作用导致地层各向异性的边坡稳定性算法,该算法可通过整体不平衡力对边坡稳定性进行判别;最后进行了三种不同工况边坡的稳定性分析.研究表明:植被浅层加筋效应仅在坡顶和坡趾附近起到一定作用,对边坡整体滑移面形态几乎不产生影响;在坡顶处水平根系加固效果强于竖直根系,在坡趾处竖直根系加固效果更佳.因此,要使生态护坡起到更好的效果,需在边坡不同位置栽种不同根系类型的植物,如在坡顶和坡趾分别种植水平和竖向根系植物.

The shallow reinforcement of vegetation has a positive effect on slope stability,this paper studies the influences of horizontal and vertical plant roots on slope reinforcement.Firstly,we analyzed the mechanism of slope vegetation,especially the strengthening effect of shallow vegetation.Then,we designed a new algorithm which can consider formation anisotropy caused by shallow reinforcement,and the stability of slope can be determined by the overall imbalance force in this algorithm.Finally,we applied it in slopes of three different working conditions to determine their stability.The conclusions are as follows:The shallow reinforcement has a small effect just on the top and toe of the slope,and it almost has no effect on deep sliding surface.Horizontal root has a better reinforcement effect than vertical root on the top of the slope,while the vertical root has a better effect on the toe of the slope.It is recommended to plant different types of root systems in different slope positions,such as to plant horizontal roots on the top of the slope and vertical roots on the toe of the slope respectively to achieve a better effect of slope vegetation.