It is a new attempt to use the anchor reinforced vegetation system (ARVS) to constrain the deformation of expansive soil. To investigate the constraint effect of ARVS on the deformation of expansive soil

water immersion model tests with and without protective methods are performed adopting medium expansive soil in Nanning

using the simplified indoor ARVS device. The deformations of expansive soil under different constraints are analyzed; and then the transfer law of expansion force is verified by finite element method according the force conditions of two different models. The results show that: with the constraint of ARVS

the deformation of expansive soil can still be divided into three stages; the ARVS can reduce the amount of expansion of expansive soil significantly; but the constraint effect of ARVS on the deformation of expansive soil before and after planting vegetation

and after planning vegetation the deformation of expansive soil can quickly reach the stable stage; the expansive force acting on the high performance turf reinforcement mats (HPTRM) firstly is transferred to the earth anchor by the anchor plate

and then the expansive force is transferred to the soil layer by the earth anchor. Anchor reinforced vegetation system provides a new method for the protection and treatment of expansive soil slope.