植物根系分布对边坡稳定性的影响  

Effect of Root System Distribution on Slope Stability

作　　者：刘俊 LIU Jun(College of Civil Engineering,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学土木工程学院,湖南长沙410004

出　　处：《人民珠江》2020年第4期140-145,共6页Pearl River

摘　　要：植物根系复杂的生长和形态分布,直接影响植物边坡土体的稳定性。以香根草根系为研究对象,理论推导出考虑植物根系分布角度对边坡安全系数的计算公式,并通过三轴试验验证了其可靠性。试验结果表明:①带根土体与素土相比较,抗剪强度有相应的提高,且根系倾角为156°时提高相对较明显;②不同的根系倾角θ带根土体较素土的c、φ值都有一定的增大,其中黏聚力较内摩擦角增大更为显著,且当θ为156°时增大效果相对较好。The effects of plant root system on the stability of slope depend on its complex growth and morphological distribution.Taking vetiver root system as the research object,this paper derives a formula for calculating the safety factor of the slope considering the distribution angle of plant root system theoretically,and verifies its reliability by triaxial test.The results show that:①Compared with the plain soil,the shear strength of root-reinforced soil increases correspondingly,and the increase is more obvious when the inclination of the root system is 156°;②For root system with different inclination,the values of c andφof root-reinforced soil also increase compared with the plain soil,but the increase of cohesive force is more obvious than that of internal friction angle,with better increase effect under 156°inclination.

关 键 词：植物护坡 根系倾角 抗剪强度 边坡稳定 香根草 

分 类 号：U417.12[交通运输工程—道路与铁道工程]