Earth pressure computation method of reinforced earth retaining wall

In order to reasonably compute the earth pressure, the order of filling and compacting earth behind reinforced earth retaining wall was analyzed, the compacting factors and deformations of backfills behind the wall were studied, the static equilibrium equation of differential earth unit in definite width was set up, and a formula of earth pressure acting on the surface of the wall was gained. When inverted filter is made of sandy gravel, the earth pressure gets bigger gradually along the wall from top to bottom, and finally tends to stable value, it is smaller than Rankine earth pressure. When inverted filter is made of sandy gravel mixed with clayey soil, the thinner inverted filter is, the smaller earth pressure is, when it reaches to a certain thickness, the earth pressure becomes negative, which indicates that some of wall faces be not forced, they possess structural function. The results show that the varying trend of earth pressure accords with the real measure result, the mothed is feasible.