For shallow footing bearing on cohesionless soils obeying Hansen/Meyerhof style bearing factors, widening the footing footprint often raises allowable bearing pressure principally because?
Choices
- (A) Pressure stays uniform irrespective of footing width factor
- (B) Sliding resistance ignores passive wedge growth entirely
- (C) Wider B enlarges footing shear keys mobilizing passive soil wedges along presumed failure mechanisms
- (D) Contractor pricing dictates bearing capacity without geotech rationale
Correct answer: (C)
Wider B enlarges footing shear keys mobilizing passive soil wedges along presumed failure mechanisms
Explanation
Wider B increases soil wedge participation on the passive side of footing sliding checks.