CFT PILE CONSTRUCTION METHOD AND THE SHORING METHOD USING THE SAME FILE

摘要

The present invention relates to construction of a cast-in-place (CIP) retaining wall, which is to prevent the ground from being collapsed in excavation construction for building a basement structure. A concrete filled steel tube (CFT) pile performing a function of an H-pile of the CIP retaining wall is constructed by: (a) a step of inserting a casing for a CFT into a bored hole while forming the bored hole by drilling a bedrock layer to a predetermined depth and inserting the casing for a CFT into the bored hole in order for a front end of the casing for a CFT to be located on the upper surface of the bedrock layer; (b) a step of inserting a steel tube for a pile into the casing inserted into the bored hole and installing the steel tube for a pile in order for the front end of the steel tube for a pile to be located on the bottom of the bored hole of the bedrock layer, wherein the outer diameter of the steel tube for a pile is smaller than the inner diameter of the casing (15) for a CFT, and connection hardware is attached in advance to the steel tube for a pile; (c) a step of placing concrete into the steel tube for a pile and charging a non-freezing type filler between the inner surface of the casing for a CFT and the outer surface of the steel tube for a pile; and (d) a step of removing the casing for a CFT.