Abstract:Distribution of earth pressure is an important problem in engineering design. According to the measured data of earth pressures on retaining structures in Nanning—Kunming railway,the amended parabola distribution map form is presented based on theoretical model. Furthermore,the formulas for calculating maximum point of earth pressure,resultant earth pressure,and its point of application,are achieved. Analysis of fitting map forms for earth pressure on above retaining structures shows that the earth pressures on retaining wall and these on soil nailing wall are identical to the Coulomb¢s active earth pressure. Accordingly,simplified map forms of earth pressure distributions in Nanning—Kunming railway are achieved.