生态护坡中植被防护边坡浅层稳定性的研究

Study on Shallow Layer Stability of Vegetation Protection Slope in Ecological Slope Protection

生态护坡是一个复杂的动态系统,目前,对边坡稳定性的研究大多集中在边坡整体稳定性方面,而对生态边坡的浅层稳定性分析较为少见。以张家口地区某公路生态边坡为研究对象,针对狗尾草植被防护边坡开展植被根系固土护坡的力学效应研究,进而研究植被对边坡浅层稳定性的影响。研究发现边坡浅层稳定性与边坡含水率、坡角、滑体深度呈负相关,与含根量呈正相关,即随着边坡含水率、坡角和滑体宽度的增加,安全系数降低;随着边坡含根量的增加,安全系数增加。

Ecological slope protection is a complex dynamic system.At present,most of the research on slope stability is focused on the overall stability of slopes,and the shallow stability analysis of ecological slopes is relatively rare.Taking the ecological slope of a highway in Zhangjiakou area as the research object,the mechanical effect of vegetation root fixing soil slope protection was carried out on the protective slope of bristle grass vegetation,and then the effect of vegetation on the shallow slope stability was studied.The study found that shallow slope stability is negatively correlated with slope moisture content,slope angle,and sliding body depth,and positively correlated with root content,that is,as the slope moisture content,slope angle,and sliding body width increase,the safety factors decrease;as the root content of the slope increases,the safety factors increase.