SELF-ENLARGEABLE PILE AND CONSTRUCTION METHOD THEREFOR

摘要

The present invention relates to a pile provided to an underground penetration hole of which direct-boring is finished, wherein an enlargement member (102) is provided to enable formation of a pile enlargement part at a portion of a pile main body (100) and comprises a cutting tool (10) for enlargement and cutting and a radial enlargement carrier (12) radially enlarged by the pressure of curable joining fillers (14, 14a). Therefore, the pile is self-enlargeable by forming the pile enlargement part by the cutting tool (10) and the radial enlargement carrier (12) which are in an enlarged state. In addition, by using the self-enlargeable pile of the present invention, the pile enlargement part can be constructed according to the standards which were designed in advance regardless of the strata such as very solid earth and sand layers or bedrock layers without any additional enlargement tool.