A method has been developed to predict soil resistance during continuous pile driving in clay based on interpretation of pile installation experience and related soils data in terms of the soil overconsolidation ratio. Soil resistance, obtained from offshore pile driving records using standard wave equation analysis, can be less than or greater than the predicted static pile capacity in normally consolidated and heavily overconsolidated clays, respectively.Analysis of installation data from large diameter pipe piles in soft to hard clays provides an empirical factor for computing soil re.sistance from the predicted static pile capacity. Values of the factor for six case histories show a consistent relationship with overconsolidation ratio, and this relationship is represented mathematically.The procedure incorporates overconsolidation ratios determined from undrained shear strength and soil index properties. The method for computing soil resistance during driving for a given soil profile based on the static pile capacity and the empirical adjustment factor is described.

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