PARTIAL EXTENSION APPARATUS FOR UNDERGROUND PIPE AND COMPOSITE CAST IN PLACE PILE METHOD USING THE SAME

摘要

The present invention extends and contracts in a direction orthogonal to the tubular body 10, and is installed at the end of the telescopic body 20 so as to be orthogonal to the tubular body 10 as the telescopic body 20 expands and contracts. It is an underground pipe body partial deformation device consisting of a pressing body 30 that moves in a direction and a synthetic pile construction method using the same.After inserting the underground pipe body partial deformation device into the pipe body 10 penetrated into the ground, it is operated and the pipe body It is to form the deformation part 11 in (10). Through the present invention, it is possible to build a solid coupling structure between the pile and the ground by forming irregularities on the outer circumferential surface of the on-site synthetic pile, thereby significantly improving the supporting power of the pile.