Study on the Stability of Slopes Reinforced by Composite Vegetation Combined with a Geogrid under Rainfall Conditions

Table 1

Mechanical parameters of the materials.

Material	Volumetric weight r (kN/m^3)	Cohesion c (kPa)	Friction angle φ (°)	Elastic modulus E (MPa)	Poisson’s ratio μ
Plain soil	18	10.3	22.85	4	0.3
Shrub reinforced soil	18	24.6	28.39	4.8	0.3
Arbor lateral roots	12.85	—	—	500	0.3
Geogrid	—	—	—	1500	0.23