Numerical Simulation Of Deformation Characteristics Of Reinforced Soil Retaining Wall With Assembled Panel Based On Shaking Table Model Test

The reinforced soil retaining wall with assembled panel is a kind of flexible retaining structure,which can rely on its deformation under the action of earthquake to ensure the overall working performance of the retaining structure.Based on the shaking table model test,FLAC3D software is used to build the reinforced earth retaining wall model based on prototype,and its deformation characteristics under earthquake load are analyzed.Based on a comprehensive literature review and the results obtained from shaking table tests,this study conducts a series of numerical simulation,which leads to the following main conclusions:1.Under the action of earthquake,the horizontal displacement of the reinforced soil retaining wall with assembled panel increases with the increase of the wall height,and the maximum horizontal displacement increases with the acceleration of the peak;2.Prototype reinforced earth retaining wall at the peak acceleration,located in the panel,the middle of the reinforced body acceleration amplification coefficient along the wall distribution of the distribution of S-shaped curve,reinforced after the filler at the acceleration coefficient of amplification along the wall Showing an anti C-shaped curve distribution;3.The potential rupture surface of the reinforced reinforced earth retaining wall exhibits a 0.5H distribution different from the standard 0.3H distribution,and with the increase of the peak acceleration,the potential rupture extends to the bottom and extends away from the panel side;4.The external and internal stability of the reinforced soil retaining wall with assembled panel is higher than that obtained by numerical simulation.The resistance of the model is calculated by the numerical simulation.And the increase of the peak acceleration increases with the increase of the peak acceleration;5.The distribution curve of the acceleration magnification coefficient along the wall height may be different in the form of reinforced soil retaining wall with different wall height;6.The horizontal displacement of the assembled panel decreases with the increase of the grid length,decreases with the increase of the grid stiffness,and increases with the vertical spacing of the grid;7.The potential rupture surfaces under different grating parameters show a shape of almost 0.5H,but the shape of the rupture surface under different grating parameters is slightly different;8.When the length of the grid is short,the shear strain of the filler is larger,and the sliding area after the reinforcement is larger and deeper downward.When the grid stiffness is small,the sliding area of the reinforcement side is less,But the deformation of the retaining wall is slightly larger.With the increase of the grid stiffness,the sliding area of the reinforcement body is slightly increased,but the deformation of the retaining wall decreases.When the reinforcement length is large,the vertical spacing of the grille can be increased Reinforced concrete retaining wall flexible structure of the advantages,but too large grid vertical spacing on the deformation and stability of the negative.It is suggested that the grid reinforcement length should not be less than 1H in the high intensity area of the earthquake,and the grid stiffness and vertical spacing should take appropriate value under the premise of ensuring the deformation of the retaining wall.