Kinematic load tests on a model pile in clay

TY - GEN

T1 - Kinematic load tests on a model pile in clay

AU - Brown, Michael

AU - Hyde, Adrian F. L.

AU - Anderson, William

N1 - This research project is being undertaken with the assistance and collaboration of Berminghammer Foundation Equipment, TNO Building Research, The Expanded Piling Company and Precision Monitoring and Control. Funding for the research has been kindly provided by the Engineering and Physical Sciences Research Council (E.P.S.R.C.).

PY - 2002/6

Y1 - 2002/6

N2 - Load testing is important for controlling the quality of piled foundations. The Statnamic test is an alternative to existing testing methods with a load duration that lies between that for static and dynamic tests. Current methods of analysis offer excellent correlation between static and Statnamic tests for coarse-grained soils but often over-predict the capacity for fine-grained soils. Thus a calibration chamber is being used to produce instrumented beds of clay with reproducible properties. A model pile placed in the beds can be loaded at varying rates using a computer controlled servo-hydraulic system. Results from the modelling will be used to improve methods of analysis and govern the design of a full-scale study. Initial results suggest the rate effect can be represented by a power law relating pile velocity and resistance. Statnamic loading of the model pile produced large negative pore pressures in the clay bed.

AB - Load testing is important for controlling the quality of piled foundations. The Statnamic test is an alternative to existing testing methods with a load duration that lies between that for static and dynamic tests. Current methods of analysis offer excellent correlation between static and Statnamic tests for coarse-grained soils but often over-predict the capacity for fine-grained soils. Thus a calibration chamber is being used to produce instrumented beds of clay with reproducible properties. A model pile placed in the beds can be loaded at varying rates using a computer controlled servo-hydraulic system. Results from the modelling will be used to improve methods of analysis and govern the design of a full-scale study. Initial results suggest the rate effect can be represented by a power law relating pile velocity and resistance. Statnamic loading of the model pile produced large negative pore pressures in the clay bed.

UR - http://www.dfi.org/pubdetail.asp?id=1040

M3 - Conference contribution

SN - 978285978358X

SP - 617

EP - 623

BT - 9th International Conference On Piling and Deep Foundations (DFI)

PB - Deep Foundations Institute

CY - France

ER -