Axial Capacity of Pressure-Injected Piles: A Cavity Expansion Model

by Roy H. Borden, North Carolina State Univ, United States,
Shuih-Liang Yan, North Carolina State Univ, United States,

Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices


The application of cavity expansion theory to the development of a mathematical model for predicting the ultimate axial capacity of pressure-injected piles in cohesionless soils is presented. The model is capable of representing both spherical and cylindrical cavities, accounts for volume change and increased frictional resistance adjacent to the pile shaft, and includes the limiting injection pressure which results in surface heave. Utilizing the developed computer program, model predictions are compared with the results of some field observations.

Subject Headings: Piles | Cohesionless soils | Axial loads | Mathematical models | Load tests | Load bearing capacity | Field tests

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