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Ahmadi ً A, Fasihi H, Jafary S. Comparison between the two methods of Rankine and Coulomb in calculating the forces applied to the retaining wall. JOTS 2024; 2 (4) :3-15
URL: http://jots.knu.edu.af/article-1-31-en.html

The usual methods for analyzing the lateral pressure of soil on retaining walls are mainly based on the theory of plastic limit states of Rankine and Coulomb. The results obtained from these methods are based on the assumption of stress-strain behavior and rigid plastic failure for the soil behind the wall. If the goal is to determine the lateral pressure on the wall for a specific amount of displacement or as a function of the displacement, these methods cannot be used. In this research, an approximate method for lateral pressure analysis on retaining walls in active and resistant conditions was presented, which can be used to determine the pressure on the wall for different amounts of wall displacement. In this article, the forces acting on the retaining wall under alpha (the angle of the wall with the horizontal surface) between 0 and 15 degrees for walls with a height of 7, 8, 9, and 10 meters, respectively, have been investigated using two methods. At the angle of the wall with the horizontal surface (alphas) of 0 degrees and 5 degrees, the active force created behind the wall in the Rankine method is slightly more than the Coulomb method, but with the increase of the value of alpha, these two forces are equal to each other.