Centrifuge Modeling Test And FEM Analysis Of Reinforced Slope

Reinforced Earth has a very wide range of applications in modern engineering,especially in the construction of high slope. Study on the deformation of reinforcedslope, play an important role in the evaluation of engineering safety.In this Paper, we conducted a series of centrifuge model tests on cohesive soilreinforced slope and wrap-reinforced sand slope for study. Select four differentreinforcement materials to simulate the different modulus and different interfacefriction of geosynthetics. Furthermore, change the geosynthetics sPacing,geosynthetics length and some other conditions, that we can explore the iMPact onthe reinforced slope of these factors like soil properties, reinforcement geometricconditions, and reinforcement types. In addition, conduct some FEM analysisaccording to the test conditions, to explore the reinforced slope deformationcharacteristics and the role of law on reinforced slope by affecting factors.Some result we got as follows:The maximum displacement of slope occurs between the half and the third highof slope, the Partial damage generate in this area; cohesive soil slope failure withsudden destruction and the destruction process can be divided into four stages:uniform small deformation stage, the mutant large deformation stage, the failure stage,and the stable phase after the destruction; the cohesive soil reinforced slope failureprogressively, the failure modes mainly are surface soil falls between the layers ofgeosynthetics, the deformation process can be divided into three stages: uniformsmall deformation stage, the growth of deformation phase, local destruction stage;wrap-reinforced sand slope deformation shape like that, the sand between two layersof geosynthetics scattered and geosynthetics buckling, and the scattered areas of soilis small; due to the friction angle of sand, about the reinforced sand slope deformation,the soil between two reinforcement have "self-locking phenomenon ", making thefailure area of sand between reinforcement be smallerWhen other conditions remain unchanged, the modulus of reinforcement within a certain range, slope stability increases with the modulus increased, but when themodulus increases to a certain level, the constraints on the role of soil has already gotthe extreme, at that time, interface friction between reinforcement and soil became thekey factors of slope deformation; when the reinforcement modulus at the same level,if the reinforcement-soil interface friction is small, the soil may have some slip alongthe reinforcement, the deformation of reinforced slope becomes large, if the interfacefriction is greater, the stability of slope is better; it means that when the modulus ofreinforcement increases to a certain value, the determinants of the slope deformationis reinforcement-soil interface friction, it is no use to increase the reinforcementmodulus any more.