Retaining Wall Design Software Verification – Reinforced Concrete Cantilever – Imperial
The data used in this verification example and the results to compare with SkyCiv Retaining Wall Design Software were taken from: The Reinforced Concrete Design Handbook, ACI SP-17(14), Vol. 2, p. 62
Input data
Stem
- Height: 10 ft 3 in (10.25 ft)
- Width: 1 ft
- Offset: 2 ft 3 in (2.25 ft)
Base
- Width: 7 ft 3 in (7.25 ft)
- Thickness: 1 ft 3 in (1.25 ft)
Active and Passive Soil
- Unit weight: 120 pcf (0.12 kcf)
- Friction Angle: 35 degrees
Substructure Soil
- Unit weight: 120 pcf
- Friction Angle: 35 degrees
- Soil-Concrete Friction Coefficient: 0.55
- Allowable bearing pressure: 3000 psf (3 ksf)
Soil Layers:
- Active: 11 ft 6 in (11.5 ft)
- Passive: 3 ft
- Substructure: 3 ft
Surcharge Load Value: –360 psf (-0.36 ksf)
Results
After creating the model in the SkyCiv Retaining Wall Design Software it was solved. The following table shows the results obtained using the software and the ones reported in The Reinforced Concrete Design Handbook:
| Units | ACI Manual | SkyCiv | Difference | |
|---|---|---|---|---|
| Overturning | ||||
| Sum of vertical loads | kip | 9.257 | 9.259 | 0.02% |
| Restoring moment | kip * ft | 42.545 | 42.552 | 0.02% |
| Sum of horizontal loads | kip | 3.272 | 3.272 | 0.00% |
| Overturning moment | kip * ft | 14.693 | 14.694 | 0.01% |
| FoS | – | 2.900 | 2.896 | -0.14% |
| Sliding | ||||
| FoS | – | 1.560 | 1.556 | 0.26% |
| Bearing | ||||
| Distance of the resultant | ft | 3.010 | 3.009 | -0.04% |
| Eccentricity | ft | 0.620 | 0.616 | -0.62% |
| Maximum Pressure | ksf | 1.932 | 1.928 | -0.21% |
| Minimum Pressure | ksf | 0.622 | 0.626 | 0.62% |
| FoS | – | 1.550 | 1.556 | 0.37% |
