Three-Dimensioned Numerical Analysis Of Stepped Geogrid Reinforced Soil Retaining Wall

Three dimensions analysis actually reflects special working characters about reinforced front-penal, grid and fill on the study of reinforced retaining wall, and the numerical model is in accordance with the actual model. based on the local experiment and indoor test, 3-D model is established to imitate construction. And the working mechanism and mechanics properties about stepped reinforced soil retaining wall are studied with lamination theories and finite element. The deformation and mechanics state of the reinforced soil retaining wall are studied compared the model test results with the numerical computation. the conclusion is as follows:1. Compared results of the model test results to the numerical calculation, the deformation and displacement of reinforced soil retaining wall are studied . The wall shows the distortion of"maw", and there is great displacement in the middle-under step of wall. The two consequences of analysis is same.2. The horizontal soil pressure in front side of retaining wall is smaller, its distribution form was zigzag and bigger in the back side. The trend of soil pressure closed to the horizontal is equal to the weigh stress. Besides, there is sudden change in the back of reiforced body. The unload of belt and step obviously influence soil pressure in front of wall. And the displacement of foundation influence mechanics properties of reiforced body. Although the different displacement of foundation cannot influence the lateral soil pressure, redistribute the inside instructural stress.3. The horizontal foundation stress presents the shape of"V"and is bigger in the back of penal. The horizontal foundation stress gets from the smallest to bigger; the vertical foundation stress gets smaller, and change from the smallest to bigger. The numerial analysis is in accordance with the model test.4. The development of plasticity district is researched adopted to augmenting outer load. And the run-through plasticity district which is got with numerical analysis is equal to the potential broken penal got from the actual belt pull.