植物根系对土体抗剪强度影响的研究

Effect Plant Roots on Shear Strength of Soil

通过室内直剪实验分析了不同含水率下有根和无根的扰动砾砂土体的抗剪性能。得出:在相同含水率下,有根土体相对于无根土体其内聚力较小,内摩擦角较大;有根土体的抗剪强度随含水率的增大而减小。最后为其在工程中的应用提出了一些建议,可为植物根系护坡技术的应用提供一定的借鉴意义。

Slope protection with plant roots not only works effectively but also beautifies the environment. It has been used in engineering for a long time and it could be the trend of slope protection in the future. This paper studies the shear behavior of disturbed gravel sand soil with roots and without roots under different water content by using the direct shear test. The results show that, （1） The cohesion of the soil with roots decreased while the internal frictional angle increased under the same water content; （2） The ;hear strength of soil with roots decreased with the increase of water content. The paper also puts forward ome suggestions in engineering application of plant roots in slope protection.