生态边坡植被对土体抗剪强度的影响研究

Study on the Influence of Vegetation on Soil Shear Strength of Ecological Slope

【目的】工程建设中产生大量的裸坡,需要对边坡进行植被恢复。探究植被对边坡土体的力学性质的影响,可为边坡稳定性评价提供参考。【方法】对研究区的根系和土体进行不同比例的混合,并进行直剪试验。【结果】结果表明:随着含水量的增加,土体的黏聚力呈现降低的趋势,根系能够明显增加土体的黏聚力,土体的内摩擦角也会有一定的提高,提高幅度小于黏聚力增加幅度。【结论】植被能够增强土体抗剪强度,生态护坡对边坡防护具有重要意义。

[Purposes]A large number of bare slopes are produced in engineering construction,so it is inevitable to carry out vegetation restoration on the slope,and explore the influence of vegetation on the mechanical properties of the slope soil.The research results will provide reference for the evaluation of slope stability.[Methods]Direct shear test was carried out on the mixture of root and soil in different proportions in the study area.[Findings]The results showed that with the increase of water content,the cohesiveness of soil showed a decreasing trend,the root system could obviously increase the cohesiveness of soil,and the internal friction Angle of soil also increased to a certain extent,and the increase range was smaller than the increase range of cohesiveness.[Conclusions]Vegetation can enhance the shear strength of soil,and ecological slope protection is of great significance for slope protection.