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DESIGN OF CANTILEVER RC ABUTMENT |
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DESIGN RESULT |
| DESIGN OF RC ABUTMENT WALL Height of Abutment above GL in M (h1): 12 Depth of Abutment below GL in M (h2): 2 Width of Abutment Base in M (b1): 9 Width of Abutment Toe in M (b2): 3 Thickness of Stem at Top in M (t1): 0.6 Thickness of Stem at Base in M (t2): 3 Thickness of Base in M (t3): 2.0 Vertical Load From Bridge / Canal in T/M (V): 20 Horizontal Load From Bridge in T/M (H): 5 Density of Soil Filling in T/M3: 1.8 Lateral Pressure Coefficient of Soil Filling: 0.33 SBC at Depth " h2 " in T/M2: 30 Coefficient of Friction between Soil and Base: 0.55 Concrete Grade: M20 Steel Strength (fy) [N/MM2]: 415 ------------------------------------------------------------------ Horizontal Soil Pressure at Base in T/M2 = 8.32 Horizontal Soil Force at Base in Tons = 63.24 Overturning Moment due to Lateral Soil Force in T-M = 365.12 Weight of Stem in Tons = 54 Weight of Base in Tons = 45 Weight of Backfill Soil in Tons = 90.72 Restoring Moment in T-M = 1190.7 Total Vertical Load in Tons = 209.72 Base Eccentricity in M = 0.56 Maximum Pressure in Base in T/M2 = 32 Minimum Pressure in Base in T/M2 = 14.6 FOS against Overturning = 3.26 FOS against Sliding = 1.82 BM in Stem at Base Top in T-M = 231.07 Equivalent Design BM in Stem at Base Top in T-M = 375.96 SF in Stem at Base Top in Tons = 47.77 BM in Stem at 2/3 rd Height from Top in T-M = 50.69 Equivalent Design BM in Stem at 2/3 rd from Top in T-M = 120.8 BM in Heel at Stem Face in T-M = 45.3 SF in Heel at Stem face in Tons = 27.3 BM in Toe at Stem Face in T-M = 121.95 SF in Toe at Eff. Depth from Stem face in Tons = 28.45 ------------------------------------------------------------------ Capacity of Stem Sec. in BM in T-M = 1840.11 Vertical Stem Reinforcement near Base at Soil Face in CM2/M = 54.78 Vertical Stem Reinforcement at 2 /3 rd Height { 7.33 M } from Top at Soil Face in CM2/M = 26.4 Vertical Stem Reinforcement Away from Soil Face in CM2/M = 21.6 Horizontal Stem Reinforcement at Each Face in CM2/M = 10.8 Factored Shear Stress in Stem in Kg/CM2 = 3.33 Max. Permissible Shear Stress in Stem = 29.8 Capacity of Stem Section in Shear in Tons = 52.42 ------------------------------------------------------------------ Capacity of Heel Sec. in BM in T-M = 804.03 Main Heel Reinforcement at Top in CM2/M = 24 Distribution Heel Reinforcement at Each Face in CM2/M = 12 Factored Shear Stress in Heel in Kg/CM2 = 2.1 Max. Permissible Shear Stress in Heel = 29.8 Capacity of Heel Section in Shear in Tons = 34.45 ------------------------------------------------------------------ Capacity of Toe Sec. in BM in T-M = 804.03 Main Toe Reinforcement at Bottom in CM2/M = 26.64 Distribution Toe Reinforcement at Each Face in CM2/M = 12 Factored Shear Stress in Toe in Kg/CM2 = 2.19 Max. Permissible Shear Stress in Toe = 29.8 Capacity of Toe Section in Shear in Tons = 36.11 ------------------------------------------------------------------ Total Concrete Quantity Consumed by Abutment in M3 / RM = 37.8 Total Steel Quantity Consumed by Abutment in Kg / RM = 1216.72 Clear Cover to Reinforcement is taken as 40 MM : Load Factor = 1.5 For Reinforcement details refer Standard details of Retaining Wall. ooooooooooooooooooo fini oooooooooooooooooooooooo |
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