Retaining wall is used to elevate or to maintain the ground surfaces. They provide support for the soil not to collapse. The two forces that act on the walls are lateral forces and vertical forces which act downwards and upwards. There are several types of these walls: counter fort, semi-gravity, gravity, and cantilever walls. Also, you should take into consideration several conditions to make the wall stable, that can be calculated with different formulas.
Retaining Wall – Details and Specifications
If you want to see more detailed information about these walls, see the link below and learn the details and the formulas for the calculations.