Soil Pressure under Pile Cap!
Soil Pressure under Pile Cap!
(OP)
When the pile cap is placed directly on the soil, does some of the load transfer to the soil? And does the code address this at all?
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Soil Pressure under Pile Cap!
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Soil Pressure under Pile Cap!Soil Pressure under Pile Cap!(OP)
When the pile cap is placed directly on the soil, does some of the load transfer to the soil? And does the code address this at all?
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RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
Anyhow, I guess my question was more, how does the ACI address this? If it does at all.
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
RE: Soil Pressure under Pile Cap!
1) You would need to evaluate the relative stiffness of the piles to the bearing stiffness. What you will find is that the pile is stiff, but the "friction" spring stiffness of the soil may be less than the bearing stiffness.
2) Also you have to be careful with upheave caused by potential swelling of soil that may impose an upward load on the pile cap (translates to load on piles). Detailing of pile to pile cap connection!
3) Downdrag - usually due to certain soils and EQ liquefaction. Thus a load again imposed beneath the pile cap....but then how do you assess liquefaction settlement. Once again detailing.
4) A combination matt and or piles/tiedowns will require a soil structure interaction model to asses stresses within the caps due to point restraints and soil bearing.
MAKE LIFE SIMPLE - don't account for bearing of pile cap in design....but detail connections properly.