Model Experiment on Mechanical Property of Reinforced-earth Retaining Wall

In this research,the model experiment of reinforced-earth retaining wall was performed to research the complicated friction characteristics and interfacial shear stresses between filled soil and reinforced zone, providing experiment basis and reference for stability calculation and analysis of reinforced-earth retaining wall. Meanwhile,the pull-out model test of the reinforced zone of different lengths was carried out under different overburden pressures and different filled-soil densities. And then through research,the mechanical behavior and deformation pattern of reinforced zone,as well as the friction properties between reinforced zone and filled soil were ascertained. The research result shows that: with the increasing of the overburden pressure,the ultimate pull-out force corresponding to the failure of reinforced zone will increase; the failure mode will change from sliding failure to fracture failure; the friction effect of filled soil on reinforced zone will be enhanced because of consolidation of filled soil. In addition,the expression form of virtual comprehensive friction coefficient considering the effect of bond stress was reasonably determined through the model experiment.