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EQUIVALENT SURCHARGE HEIGHT OF EARTH =. ACTIVE EARTH PRESSURE DUE TO EARTH FILL BEHIND THE BALLAST WALL AND ABUTMENT. =. Ka 3 =. = 0.251. P2 =. STABILIZING MOMENTS : TAKING MOMENTS ABOUT A. Stresses without wind. = W / b (1 ± 6e / b)
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EQUIVALENT SURCHARGE HEIGHT OF EARTH = ACTIVE EARTH PRESSURE DUE TO EARTH FILL BEHIND THE BALLAST WALL AND ABUTMENT
Ka3= = 0.251
Stresses without wind = W / b (1 ± 6e / b) = 52.9228/1.69 (1 ± 6 x 0.3957/1.69) =31.3153 (1± 1.4049) Max. = 75.31 t/m2 Min. = -12.68 t/m2
Stress with Wind : Section Modulus = bd2/6 = 4.2752/6 = 3.046 m3 Stress due to Wind Moment = 32.11/3.046