| US 7,600,412 B2 | ||
| Pseudostatic pile load testing method | ||
| Takaaki Miyasaka, Sumida-Ku (Japan); Shigeki Kondo, Sumida-Ku (Japan); and Fumio Kuwabara, Minamisaitama-Gun (Japan) | ||
| Assigned to Kabushikigaisha Jiban Shikenjo, Tokyo (Japan) | ||
| Filed on Feb. 16, 2006, as Appl. No. 11/355,007. | ||
| Claims priority of application No. 2005-051046 (JP), filed on Feb. 25, 2005. | ||
| Prior Publication US 2006/0191316 A1, Aug. 31, 2006 | ||
| Int. Cl. G01N 3/34 (2006.01) | ||
| U.S. Cl. 73—11.03 | 1 Claim |
| 1. A pseudostatic pile load testing method for determining bearing capacity in a yield point between a pile and a ground on
the basis of a relation between a drop energy of a heavy weight and a displacement of a pile head by dropping said heavy weight
through a cushion onto said pile head, said method comprising the steps of:
forming a cushion by alternately laminating plates or blocks made of a higher polymer material and metal plates, wherein holes
are formed in a load applying direction in the plates or blocks;
putting said cushion on said pile head to regulate a load applying time;
attaching a displacement gage on a side of said pile head;
dropping said heavy weight onto said cushion plurality of times in succession, wherein a drop height of said heavy weight
is changed from a lower position to a higher position to alter the drop energy of said heavy weight for each of successive
drops, until said yield point can be obtained; and
determining bearing capacity in said yield point between a pile and a ground on the basis of the relation between the drop
energy and a displacement of said pile head in a last drop position of said heavy weight.
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