中文摘要：

通过对模型箱根—土的试验研究，探索了混合种植林草的边坡土体的初始含水量、边坡坡度及有效根密度等对边坡土体抗崩解能力的影响。研究结果表明：边坡土体的抗崩解能力不但与边坡坡度和土体的初始含水量有关，更与边坡土体中的有效根密度有关；在一定的初始含水量条件下，土体抗崩解能力随着有效根密度的增大而呈幂函数增长趋势；在此基础上提出了不同初始含水量和不同有效根密度条件下土壤完全崩解所需时间的计算公式。研究结果为揭示植物根系对边坡稳定性的增强机理提供了理论基础，也对促进生态护坡和植物边坡的水土保持等技术的发展具有一定的理论及工程应用价值。

英文摘要：

Through an experimental study on root-soil in a model box, the influences of some factors upon anti-disintegration of soil slope were explored, such as initial water content and slope gradient as well as effective roots density etc., when the slope was planted with trees and grasses. The research results show that the anti-disintegration of soil slope was not only related to slope gradient and initial water content, but also was more related to its effective roots density;Under the given initial water content, the anti-disintegration of the soil increased with the increment of its effective roots density, and took an exponentially increasing trend;A computational formula to calculate the time that the soil is completely disintegrated was proposed, under the conditions of different initial water content and different effective roots density. The ifndings provide a theoretical basis for exploring the mechanism that the plant roots enhanced slope stability, also provide certain theory and application values in the engineering for promoting the ecological protection slope and plant slope’s soil-water conservation functions.