Abstract
A series of model tests is performed to estimate the load-settlement behavior under static loading condition by a quasi-static loading test using a spring at pile head. In the experiment, a closed-ended steel pipe of 41 mm diameter, three kinds of coil springs and five kinds of drop hammers are used. The effects of elastic wave propagation in the pile can be eliminated in quasi-static test because the loading duration in quasi-static test is longer than in dynamic test. It is recommended the usage of a relatively rigid spring to obtain the load settlement curve that agrees well to those of static tests until large settlement.
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