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Technology
Assessment & Research (TA&R) Program
| Project
Number |
45 |
| Date of Summary |
March 31, 1988 |
| Subject |
Field Study of the Dynamic
Response of Single Piles and Pile Groups in Stiff Clay |
| Performing Activity |
The University of Houston |
| Principal Investigator |
Dr. Michael W. O'Neill |
| Contracting Agency |
Federal Highway Administration |
| Estimated Completion |
Complete |
| Description |
To investigate the behavior of
single piles and pile groups under dynamic loading. Tests were conducted on instrumented
full scale single piles and pile groups. The project is a cooperative effort with Federal
Highway Administration (FHWA), Furgro-Gulf, Inc., the University of Houston, and 9 other
sponsors (Arco, Brown and Root, Chevron, Citgo, Exxon, Marathon, Mobil, Raymond
International, and Shell). The purpose of the program is to improve the understanding of
dynamic pile-soil-pile interaction of single piles and pile groups in a cohesive soil.
This is a companion study to Project No. 46. |
| Progress |
Complete. Dynamic load tests were
run on single and nine-pile clusters by applying quasi-harmonic, vertical and horizontal
loads to the pile heads. For single piles, predictions modeled vertical behavior when
loads were below those required to produce static failure. Vertical behavior of the
cluster could not be reasonably modeled. Horizontal behavior of the single pile was
predicted accurately below system resonance. Mathematical models need to be improved in
some cases to account for phenomena such as radiation damping. |
| Reports |
AA Vol. 1 (296 pages)
AA Vol. 2 (338 pages)
|
O'Neill, M. W., Blaney, G. W.,
Muster, G. L., Behavior of Single Pile and Pile Groups in Over-consolidated Clay Under
Relatively Low Frequency Loading, Volumes 1 and 2, Furgro-Gulf, Inc., and University of
Houston, December 1982. |
| AB (225 pages)
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O'Neill, M. W., Hawkins, R. A.,
Mahar L. J., Field Study of Pile Group Action: Final Report (with Appendixes A-c),
University of Houston, Houston, Texas, October 1980. (Unclassified) |
| AC (282 pages)
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Field Study of Pile Group Action:
Interim Report, Report No. FHWA/RD-81/001, March 1981. |
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