植物根系与边坡土体间的力学特性研究

建立了根土相互作用的力学模型，在限定根在土体中方位的情况下推导出了由于根的加筋作用所增加的土体抗剪强度公式。并在实验室进行了大量常规直剪试验。对试验结果进行了分析，并和理论计算相比较，结果表明：植物根系可以明显提高土体的抗剪强度；随着含水量的增加，土体和根-土复合体的抗剪强度会下降；直根和斜根对根-土复合体抗剪强度的提高是相似的，都是随着根条数的增加而增加，但斜根的加强作用要大些；随着根条数的增加，根-土复合体的c、φ值都会提高。

INTERACTIONAL MECHANICAL CHARACTERISTICS BETWEEN PLANT ROOTS AND SLOPE SOIL

The paper built a mechanical model of soil root interaction and deduced the formulas of adding shear strength by the roots on the base of constraining the direction of roots. A number of direct shear tests have been done to verify the validity of theory results. Analyzing the experimental results and comparing them with theoretical results, It is shown that~ the roots can improve the shear strength of soil; the shear strength between soil and soil-roots system complex will decrease when the moisture content of soil increases; the straight roots and inclined roots can affect the shear strength similarly; the shear strength will increase when the amount of roots increases, but the effect of straight roots is little than inclined roots; the values of c and will increase when the amount of roots increases.