植物根系生长形态对边坡浅层稳定性影响数值研究  

Numerical Study of Effect of Roots Morphology on Shallow Stability of Slope

作　　者：陈潮[1] 张俊云[1] 赵晓黎 高胜君 明明[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]西藏自治区水利电力规划勘测设计研究院,拉萨850000

出　　处：《长江科学院院报》2017年第4期126-130,135,共6页Journal of Changjiang River Scientific Research Institute

基　　金：中央高校基本科研业务费专项资金科技创新项目(2682014CX077)

摘　　要：为了研究植物根系在不同生长形态下的锚固作用,将根系作为"活土钉"作用于边坡,运用强度折减法进行数值计算分析;通过考虑根系的侧根数量、分枝角度2方面的形态要素,探究其对于边坡浅层稳定性的影响。数值计算结果表明:根系对于边坡浅层的加固效果明显,能改善坡体内应力状态,控制位移变量;随着侧根数量的增多、侧根分枝角度增大,边坡的安全系数逐渐提升,同时破坏形态呈现出渐进式破坏,坡中部逐渐显现"凸肚",坡脚未加固区出现隆起现象。In the aim of investigating the anchorage effect of roots of different morphology when functioned as ＂live nail＂ within the slope,numerical calculation and analysis was carried out in association with strength reduction method.The influences of number and tiller angle of lateral roots on shallow stability of slope were analyzed.Results of numerical calculation show that vegetation roots have obvious reinforcement effect on shallow slope.Roots could improve the stress state of slope body and control the displacement variable.Safety factors of slope gradually improved with the increases of the number and tiller angles of lateral roots displaying a trend of progressive failure that bulging deformation gradually occurred on the central section and vertical upheaval deformation appeared on the toe area with no reinforcement.

关 键 词：植被护坡技术 根系生长形态 数值计算 浅层稳定性 强度折减法 

分 类 号：TU43[建筑科学—岩土工程]