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A rapid plate-loading test has more advantageous points than a static loading test, because it is performed at a simple condition and in a short time. The only relationship between a working load and settlement is obtained from the test. However, the works are on the increase to estimate the bearing capacity and the rigidity of ground at the site from the rapid plate-loading test. This report presents the comparisons between the results of the static and rapid loading tests, which were performed at the nine sites, and more the rigidity and the ultimate bearing capacity of the ground at the test sites, which are estimated from the rapid loading tests.

In case of the bearing capacity of a pile, tapered piles installed by the press-in method have more convenient points than straight-sided piles. Some sorts of in-situ tests, including press-in tests, axial compressive tests, uplift tests and lateral tests, were carried out on the steel pipe tapered piles in Kanto Loam. This paper presents the outline of the tests, the results of the tests and so on. Moreover, the discussions about the test results are presented.