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为研究植物根系固土护坡的力学机理,以芦竹(Arundo donax)、狗牙根(Cynodon dactylon)和早熟禾(Poa annua)为研究对象,对它们的根系分布特征及抗拉特性进行研究。结果表明,在根系分布特征方面,随着土层深度的增加,3种植物的根系数量逐渐减小,并且大部分集中在土层的上表面。数据拟合表明,采用幂函数模型能较好反映根系的空间分布;在根系抗拉特性方面,3种植物根系均表现出一定的抗拉能力,根系抗拉力与根径呈幂函数正相关关系,随根径增大而增大,3种植物按根系抗拉力由大到小依次排列为:芦竹、狗牙根、早熟禾;根系抗拉强度与根径呈幂函数负相关关系,随根径增大而减小。
Arundo donax, Cynodon dactylon and Poa annua were selected as the research objects to study the mechanics mechanism of plant root slope protection. Their root distribution and tensile properties were studied. The results showed that in root distribution characteristics, with the increase of soil depth, the root number of three plants decreased gradually, and most of them concentrated on the upper surface of soil layer. The data fitting showed that the power function model could well reflect the spatial distribution of the root system. The root tensile properties of the three plants showed some tensile strength, and the root tensile strength was positively correlated with the root function The relationship between root tensile strength and root diameter showed a negative power-related relationship between root tensile strength and root diameter, With root diameter decreases.