ANALYSIS OF DEFORMATION CHARACTERISTICS OF IRREGULAR REINFORCED EARTH RETAINING WALL UNDER THE INFLUENCE OF AUXILIARY REINFORCEMENT

Taking engineering examples as background, establishing a three-dimensional numerical analysis model to study the deformation characteristics of irregular reinforced earth retaining wall by changing the auxiliary reinforcement mode on the basis of single-stage vertical reinforced earth retaining wall with 90°corner by using numerical analysis software FLAC^3D. The results show that:(1)Adding reinforcement can significantly reduce the deformation of the corner of reinforced earth retaining wall and alleviate the concentrated deformation effect of the top of the corner. (2)Adding half of the reinforcement in the upper part of the wall height can not control the corner deformation of the retaining wall as a whole, but it can also play a good role, and it is more economical. Specific schemes can be selected according to needs. (3)The variation of the spacing between the auxiliary reinforcement and the main reinforcement has little effect on the deformation of the corner. It can be flexibly adjusted in design and construction according to the actual situation. (4)The maximum tensile stress distribution of geogrid at corners presents an "X" shape, which is obviously different from the distribution of parallel walls at straight part, and the deformation is significantly greater than that at straight part. (5)The tension stress of the outer edge of geogrid is the largest at 6 m from the corner, which can be used for reference for specific projects, that is,to strengthen the deformation control of retaining wall around 6 m.