Unformatted text preview: Clay-silt-sand mixtures, very silty f = 2.0*N*(11 O-N)/4583.3 sand, silts and marls 3 Clean sands f = O.019*N 4 Soft limestone, very f = O.01*N shelly sand Pile Capacity: Database research at the University of Florida has indicated that, using the RB-121 methodology, it requires excessive pile movement to mobilize the calculated ultimate pile capacities. To better match the measured load test capacity values (using Davisson failure criteria) with calculated values, the "Mobilized End Bearing" has been set equal to 1/3 of the RB-121 ultimate end bearing value. The Davisson capacity equals the ultimate side friction plus the mobilized end bearing. The allowable pile capacity is taken as 1/2 the Davisson capacity. The ultimate capacity is then equal to the ultimate side friction plus 3 times the mobilized end bearing....
View Full Document
- Fall '08
- Equals sign, Silt, Mobilized End Bearing, mobilized unit end, corresponding SPT blowcount