Publication Abstract

Proceedings - Fifth International Conference & Exhibition on Piling and Deep Foundations, 1994, Bruges, Belgium, (DFI)

Predictions of load-settlement relations of steel pipe piles from dynamic load testing
M. Hayashi, T. Okamoto, F. Kanai & T. Matsumoto

The test pilings were carried out with two open-ended steel pipe piles, in preparation for the design of foundation piles for the Trans Tokyo Bay Highway. This paper presents the performance of predicting the static load-settlement curves from stress-wave analyses of the piles. Dynamic load testing was carried out on the test piles. A redriving test was also conducted. Wave matching analyses were done to identify the soil resistance parameters using a pile-soil system. The estimated parameters were further used to predict the load-settlement curves with the use of the same pile-soil system. The static loading tests of each test pile was performed 3 months after the installation of each pile. Although the ultimate load was not applied due to the limit of capacity of the reaction device, the test results clearly showed that the piles had a bearing capacity which was larger than the design allowable load. The load-settlement curves of the piles predicted from the wave analyses were comparable with the static performances with an acceptable accuracy for practical purposes. It is shown from the analyses of pile T1 that the accuracy of load-settlement curve which was predicted from the redriving data was improved compared with that from the initial driving data.

 article #807; publication #36 (IC-1994)