CONSTRUCTION METHOD OF CAST-IN-PLACE CONCRETE PILE

摘要

PROBLEM TO BE SOLVED: To provide a construction method of a cast-in-place concrete pile, which can secure a pile diameter substantially the same as a designed pile diameter, even when a ground compression pressure is greater than a concrete pressure. SOLUTION: A lid member 6 with its diameter set substantially the same as the inner diameter D of a casing 5 and having a predetermined areaπ(D/2)^2, is disposed on the upper surface of the cast concrete 2 when the casing 5 is pulled out while the concrete 2 is cast into a drilled hole 1, and then a weight 7 with a predetermined weight W is disposed on the upper surface of the lid member 6. Thereby, a loadΔp=W/[π(D/2)^2] is applied to the cast concrete 2 to obtain an inner/outer pressure p1+Δp≥p2of a concrete pressure p1and a ground compression pressure p2working on the hole wall 1a of the drilled hole 1. COPYRIGHT: (C)2011,JPO&INPIT