Reinforced The Theory Of Soil Strength And The Reinforced Embankment Finite Element Analysis

The strength of reinforced soil and the characteristic of interface between soil and reinforcement are researched by the shear tests and the triaxial tests. The results have shown that the shear relationship between soil and reinforcement obeys to Mohr-Coulomb theory. The more the degree of compaction is, the more the coefficient of friction between soil and reinforcement is. With the increase of the degree of compaction, the elastic modulus and the amount of reinforcement, the strength of reinforced soil increases. The strength of reinforced soil around circumference is bigger than that around diameter. In finite element analysis, according to the test road, different reinforced embankments, which are of different heights, slopes, spacing and distributions, are analyzed. It is shown that when the height of the embankment increases or the spacing from one reinforcement to another decreases, the horizontal displacement of the reinforced embankment' s slope increases. The position of the reinforcement moving upwards, the horizontal displacement of the reinforced embankment' s slope increases. The change of the slope has a little influence in the horizontal displacement of the reinforced embankment' s slope. The embankment midline is the symmetric axle of major principal stress and major principal stress decreases from the midline of the embankment to two sides of the embankment. If the embankment' s height and slope are increased, the failure surface and lateral displacement of the embankment will also increase. The distance from one reinforcement to another and the position where reinforcements locate in have a little influence in the failure surface and lateral displacement of the embankment.