Abstract
Dynamic load test of piles has been developed and increasingly conducted in recent years. Dynamic load test has the greater advantage that there is no need to prepare special machines for the test in case of the tested piles are planned to be driven by hammers. Therefore, it is easy to test a large number of piles at a single construction site. On the other hand, the procedures to utilize the obtained test results for design of structures are not described in Japanese design codes for port facilities, road bridges, and so on. This paper will introduce a series of dynamic load test results obtained at a single construction site, and evaluate the variance of it. The procedure to utilize the test results for design will be discussed based on the results of considerations.