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Analysis of Deformation of Vertically Loaded Piles
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1978
Year
Pavement EngineeringVertically Loaded PilesEngineeringMechanical EngineeringSoil-structure InteractionSoil MechanicsSoil MechanicGeotechnical EngineeringSoil DynamicsSoil EngineeringFoundation EngineeringSoil StiffnessApproximate Closed-form SolutionUnsaturated Soil MechanicsGeotechnical PropertyCivil EngineeringLinear Elastic SoilGeomechanicsStructural MechanicsRock Mechanics
The solution was derived by separating load transfer into shaft and base components, with well‑proven numerical techniques used to validate the assumptions. The closed‑form solution provides a load‑settlement ratio in terms of pile geometry, stiffness, and soil stiffness, enabling back‑analysis of pile tests and the creation of design curves for various geometries in soft clay.
An approximate closed-form solution has been obtained to the problem of a vertically loaded pile in a linear elastic soil. This solution has been derived by uncoupling the load-transfer for the pile into separate shaft and base components. Throughout the development of the analysis, well-proven numerical techniques have been used to verify that the assumptions made are reasonable. The final form of the solution gives the load-settlement ratio of the pile in terms of the pile geometry and stiffness and soil stiffness. The analysis has been used to back-analyze pile tests, enabling immediate estimates of the soil stiffness profile to be made from the measured load-settlement curve of the pile. The application of the method to pile design is demonstrated—design curves being sketched for piles of different geometries in two typical soft clay deposits.