The stresses at the bottom of the pier were computed for the case with self-weight, live load with 25-t axle load, and the longitudinal force applied with the train moving in the direction of CR to K. The total vertical and horizontal forces at the bottom of the pier were computed to be 33,780 and 2,203 kN, respectively. These values translated to a vertical stress of 0.520 MPa and a horizontal stress of 0.034 MPa at the base of the pier. These low values indicate that the pier is safe against bearing and sliding. The bearing capacity of rock typically lies above 200 MPa, whereas the shear strength is above 1.0 MPa.
Read More: http://ascelibrary.org/doi/full/10.1061/%28ASCE%29BE.1943-5592.0000338