Abstract: According to centrifuge test results on the composite structure of masonry and reinforced soil retaining walls,numerical models were built by ABAQUS to study the influence of reinforcement spacing and modulus on the deformation characteristics and the soil pressure distribution of this composite structure. It is found that small reinforcement spacing and larger reinforcement modulus have better reinforcement effect in controlling the deformation of retaining walls considering the variation range of parameters in this research. Due to the soil arch effect in the filling zone of masonry retaining wall,the soil pressure distribution in the upper part of reinforced retaining walls is different from that of conventional walls,and the masonry retaining wall can be regarded as a solid foundation as long as reinforced retaining wall is high enough. Moreover, the deformation of this composite structure mainly occurs in the construction period,so enough attention should be paid to controlling the construction quality.

Key words: road engineering, composite structure of masonry and reinforced soil retaining walls, numerical simulation by ABAQUS, deformation characteristics, soil pressure distribution, centrifuge model test