Patent ID: 7600412
Filing Date: 2009-10-13
Classification: E02D,G01N

Abstract:
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.