夹竹桃根系力学性能的实验研究

Mechanical Property Experimental Study on Nerium Oleander Roots

以护坡典型植物夹竹桃根系为对象进行室内抗拉试验,研究了根系直径与抗拉力和抗拉强度之间的关系。试验结果表明,单根夹竹桃极限抗拉力随着直径增大不断增大,根茎的抗拉强度随着直径的增大不断减小;根据数据采集时间和根系应变之间的关系,计算出根系弹性模量;证实夹竹桃根系与土体形成根土复合体能够改善土体的强度和变形特征,共同承担外界荷载,有效提高边坡土体抗冲刷和抗侵蚀能力。

A laboratory tensile test was conducted on the roots of Nerium oleander to investigate the relationship between the root diameter and its tensile resistance and strength.The results indicate that the ultimate tensile resistance of a single Nerium oleander root grows and the tensile strength decreases with its diameter increasing.Based on the data-collecting duration and stress-strain relationship of the roots,an elasticity modulus was calculated.The Nerium oleander root-soil complex can enhance the soil intensity and deformation characteristics and resist the exterior loading,which contribute effectively to the erosion resistibility and anti-scour capacity of slopes.