Author(s)

M.H. Davoudi, S.M. Fatemi Aghda & G.R. Shah Ali Pour

Abstract

Landslide is one natural hazard which causes lot of damage, different methods of stabilization are currently practised, among them soil reinforcement with tree roots. The roots increase the shear strength of soil by transmitting developed shear stress to tension strength. The additional strength created by roots is defined as the growing cohesion, which increases with vertical stress and area occupied by the roots. In this research, an attempt was made to study the effect of willow root on a clayey soil. Large-scale in-situ direct shear tests were carried out on both rooted and rootless soils. The occupied root area was calculated by counting the number and measuring the diameter of all

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