I am using the FHWA approved DRIVEN program to calculate the drilled shaft foundation lengths for several overhead sign structures. My shaft lengths are coming out to be very small (5 to 8 feet). I think they are too low possibly due to bigger diameters being used by the SE (36-inch). Are there...
Can anyone suggest ways of accurately estimating the Modulus of Subgrade Reaction for a soil. Available parameters:
SPT N values, Moisture, Unconfined Compressive Strength & Angle of Internal Friction.
Is the Soil Spring Constant the same as Modulus of Subgrade reacton? I argued with a collegue that it is not. Please tell me I am right! Can anyone give me references where I can get some info about Soil Spring Constant.