Who would introduce me some academic methods of retaining wall(was dragged by a equipment)?

There is a retaining wall near the river. The retaining wall protect the soil be washed away. I want to calculate the passive earth pressure when the retaining wall was dragged by a equipment (the drag force toward to soil and applied on the top of the wall). And, of course, I just need the method，so the depth of water，the hight of wall, drag force, and so on can be represented by the English alphabets. I do not know any academic methods of solving the case. Who would introduce me some datails about academic methods of retaining wall (was dragged by a equipment) near the river?