BEARING FORCE ANALYSIS OF PILE FOUNDATION AND ITS DEVICE

摘要

PURPOSE: To define the bearing force of a pile to obtain only one solution, by measuring the accelaration, strain, and displacement of the pile every driving stroke to obtain the viscous attenuation coefficient and the spring constant of the ground and multiplying the variation of the elastic limit by the spring constant. ;CONSTITUTION: When a pile 4 is hit with a specified hitting load P(t), the accelaration (a) of the pile 4 is measured by an accelaration meter 1 and the strain is also measured by a strain meter 2. And the displacement (y) of a target 3a for displacement measurement is measured by an optical displacement meter 3b. The viscous attenuation coefficient C and the spring constant KD of the ground are obtained by use of an equation of motion on hitting the pile 4, M.a+C.v+kD.y=P(t), where M is the mass of pile 4, V is the speed of pile 4 and further, in accordance with the strain and the frequency of displacement (y). Moreover, the bearing force of the pile 4 is obtained by multiplying a specified limit displacement of the pile 4 by the spring constant KD.;COPYRIGHT: (C)1993,JPO&Japio