Uplift Capacity of Belled Caissons (Drilled shafts with a bell)

[SAL613]

How do you take into account the bearing capacity against the bell when calculating the uplift capacity of a belled caisson? Can this component of resistance be combined with the frictional resistance along the shaft?

 

[SlideRuleEra]

See: thread256-39166

http://www.SlideRuleEra.net

http://www.VacuumTubeEra.net

 

[Ron]

Only if the rebar cage extends into the bell.

 

[Ron]

Well...you do get some resistance from the shear strength of the concrete at the bell/shaft interface also.

 

[molerat2210]

See FHWA Drilled Shafts manual. It covers this topic. Free download for the website.

http://www.fhwa.dot.gov/engineering/geotech/