Study On The Working Behavior Of Cantilever Retaining Wall With Anchor And Box Bottom Slab

Based on the conclusion of the advantages and disadvantages of the anchor-plate retaining wall and the cantilever-type retaining wall,a new type of cantilever-type retaining wall with a support structure_anchor-box type is proposed,and the cantilever-type retaining wall is studied by means of the indoor model test and the numerical simulation.The working characteristics of the cantilever retaining wall,the core-filling box type bottom plate cantilever retaining wall and the anchor-pull box type bottom plate cantilever retaining wall of the anchor-pull cantilever type retaining wall.The main contents and conclusions are as follows:1.Based on the direct shear test,the influence of compactness on shear strength parameters of soil is studied.The experimental results show that the cohesive force and internal friction angle of the soil increase with the increase of compactness,but the speed of change is different under different moisture content conditions.2.The laboratory model test and numerical simulation of pull-out bearing capacity of anchor plate are carried out.The results show that the ultimate bearing capacity of anchor plate increases non-linearly with the increase of cohesive force of soil,side length of anchor plate and buried depth of anchor plate.The relation between pull-out bearing capacity and displacement of anchor plate is nonlinear.3.The indoor model comparison tests of L-type cantilever retaining wall,anchor-pull cantilever retaining wall,core-filled box floor cantilever retaining wall and anchor-drawing box floor cantilever retaining wall are carried out.The deformation of four types of retaining structure and the distribution of earth pressure behind the wall are obtained.The results show that the retaining capacity of different types of retaining structures is as follows: cantilever retaining wall of anchor box bottom plate > cantilever retaining wall of core filling box floor > Anchorage cantilever retaining wall > L cantilever retaining wall.4.Based on FLAC3D software,the influence factors of earth pressure distribution and displacement of cantilever retaining wall are studied.The results show that the earth pressure of cantilever retaining wall increases with the increase of soil filling and Poisson's ratio,and the soil pressure of cantilever retaining wall of anchor box floor increases with the increase of Poisson's ratio and the soil pressure distribution of cantilever retaining wall.It decreases with the increase of cohesive force,internal friction angle and elastic modulus.The displacement of retaining wall increases with the increase of fill weight,elastic modulus and Poisson's ratio,and decreases with the increase of soil cohesion and internal friction angle.When the cohesion and internal friction angle increase to a certain extent,the displacement of the retaining wall tends to be stable.5.By means of FLAC3D numerical simulation software and strength reduction method,the corresponding relation between stability factor and displacement of cantilever retaining wall with anchor box floor is discussed.It lays a foundation for the design of double control of stability and deformation of cantilever retaining wall with anchor box floor.