CAST-IN-PLACE CONCRETE PILE AND METHOD FOR REDUCING NEGATIVE FRICTION FORCE APPLIED THERETO DUE TO CONSOLIDATIVE GROUND SETTLEMENT

摘要

PURPOSE: To provide a pile which permits economy-oriented designing and ensures safety after execution of works by reducing the friction force applied plumb downward to a cast-in-place concrete pile from the ground, in which the pile is placed, using a stretchable undulate board even though the ground is not tough and settled, and reducing any extra axial force to be applied to the pile other than the plumb load due to building, etc. ;CONSTITUTION: Metal members 6 having resilience are interposed between hoop rod (reinforcing bars) 4 of a pile cage 2 and a stretchable undulate board 5 having an easy-to-slip outside surface, and the inner and outer ends of each metal member 6 are secured to the hoop rod 4 and undulate board 5 by means of welding, etc., 7, 8. If this type of cast-in-place concrete pile 1 is embedded in the ground, a slip is generated between the ground and undulate board 5 even though the ground is not tough and settled, and therewith the friction force (negative friction) applied downward plumb to the pile 1 can be reduced.;COPYRIGHT: (C)1993,JPO&Japio