DRAINAGE TREATMENT STRUCTURE AND METHOD FOR FORMING THE SAME

摘要

PURPOSE: A drainage treatment structure and a method for forming the same are provided to prevent defects caused by differential settlement after improving ground by means of pre-loading process by forming a drainage structure. CONSTITUTION: The structure is formed by a step of boring a foundation ground(S1); a second step of preparing a water-permeable sand layer to outflow water contained in the ground(S2); a third step of forming a resin cast-releasing steel pipe at upper end of the sand layer(S3); a fourth step of forming another sand layer over the steel pipe(S4); a fifth step of forming a high grade soil layer over the sand layer(S5); and a sixth step of forming a common earth layer over the high grade soil layer(S6). The structure has a securing part having bent portion covering outer side of the steel pipe. The securing part has a linear portion formed with a joint portion having several depth control holes.