Deformation Analysis Of Embankment On Sloping Poor Ground

Sloping poor ground is brought forward to field engineering, which refers to the poor ground having a gradient surface on the ground or hardpan. It is common in the southwest mountain area of China. It is worth showing solicitude for the stability and deformation of the subgrade on the sloping poor ground. The research on the stability of the slope ground and the poor ground has been made great progress, but few work aimed at sloping poor ground has been done. This thesis approached the engineering characteristics of the sloping poor ground from numerical analysis by FEM and model test with geo-centrifuge. The main work is as follows:1. The research achievements at home and abroad about poor ground, slope ground and sloping poor ground have been collected and summarized to know the present development.2. The finite element analysis has been carried out using the commercial software GEO-SLOPE. The deformation of the subgrade on the sloping and the level poor ground has been compared. The influences of the changes including the height of the embankment, the gradient of the ground and the height of the poor ground on the subgrade have also been discussed.3. Two groups of geo-centrifuge model test, separately with level poor ground and sloping poor ground with a gradient of 1 in 10. are carried out to specifically analyze the deformation under the embankment load. The comparison has been made between the results of the model test and the numerical calculation.All the results show that the deformations of the sloping and the level poor ground differ greatly. The horizontal displacements, vertical settlements, shear strains and the plastic ranges of the sloping poor ground are much large than that of the level poor ground. The displacement and the raise on the lower side of the slope foot are more obvious. All these indicate that the subgrade on the sloping poor ground lose the stability more easily.