Contemporary Topics in In Situ Testing, Analysis, and Reliability of Foundations - 2009 International Foundation Congress and Equipment Expo, Orlando, FL, United States Of America, 15 - 19 March 2009, pp.270-277
The displacements of axially loaded single piles can be analyzed using a variety of techniques. One of the simplest is based on the theory of elasticity and, thus, is most useful for estimating movements in working range of loads. An advantage of this method is that it requires use of only two soil properties: Young's modulus and Poisson's ratio. Predictions are relatively insensitive to the selected values of Poisson's ratio. Values of Young's modulus are not usually obtained during a site investigation. In situ values in the free field may not be relevant for prediction of pile displacements because pile driving is likely to change the properties in critical regions right around the pile. Consequently, the most practical approach seems to be to find values of Young's modulus that cause predictions to match measurements and develop correlations with data from conventional field testing. Such analyses were performed using data from a number of pile load tests performed in California. Theresults are presented here. Copyright ASCE 2009.