Analysis of Creep Settlement of Pile Foundations

by John R. Booker, Sr. Lect. in Civ. Engrg.; Univ. of Sydney, Sydney, Australia,
Harry G. Poulos, (M.ASCE), Reader in Civ. Engrg.; Univ. of Sydney, Sydney, Australia,

Serial Information: Journal of the Geotechnical Engineering Division, 1976, Vol. 102, Issue 1, Pg. 1-14

Document Type: Journal Paper

Abstract: The problem of the settlement of a pile in a soil exhibiting creep properties is analyzed by converting the viscoelastic problem to an equivalent elastic problem by means of a Laplace transform. The solution in then found in Laplace transform space in the form of an eigenvalue expansion and transformed back to obtain a numerical solution to the original problem. Some typical solutions are presented for the settlement and base load transfer in a pile for two types of creep response, a terminating creep represented by a linear viscoelastic model and a nonterminating creep in which creep strain is a linear function of log time. This fact leads to a simple expression for the logarithmic creep settlement rate of the pile. The determination of the required soil parameters from long-term pile loading tests is considered and values backfigured from such a test are presented.

Subject Headings: Pile settlement | Creep | Soil settlement | Pile tests | Load tests | Soil analysis | Elastic analysis |

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