CONSTRUCTING METHOD FOR HOLLOW CAST-IN-PLACE CONCRETE PILE

摘要

PROBLEM TO BE SOLVED: To establish a constructing method for cast-in-place concrete pile which can ensure the operator's safety in working and saving the labor and which heightens the assembling accuracy of a core form to be installed in a pile hole. ;SOLUTION: A pile hole 6 excavated is subjected to a slime processing, and a core form 14, bottom lid support 18, and mild steel bar cage 24 are inserted in the pile hole, and an expanding device 22 installed in the lower part of the support 14 is expanded by remote control from upon the ground. Concrete is placed through a tremie tube 28 so hat a reinforced concrete part in the form of a hollow circular column is formed, and the expanding device 22 is restituted and the support 18 and core form 14 are removed from the pile hole 6, and then a hollow cast-in-place concrete pile is constructed by placing concrete in the bottom hole 12 so that a bottom-filling concrete part is accomplished. According to this method, no operator is required to go into the pile hole 6, but all works can be conducted upon the ground, which should ensure the safety in works and saving the labor.;COPYRIGHT: (C)1998,JPO