To increase the bending strength and shearing yield strength of a pile by expansible fillers and a sheathed pipe unified with the pile by injecting the fillers into space between the sheathed pipe and the pipe and curing the fillers.
A steel pipe 3 is rotated and penetrated up to specified depth, pressure water is changed over to a stabilizing liquid and extraction and drilling processes are completed while filling the inside of a drilled hole, a sheathed pipe 2 is connected to an auger excavator 11 and faced to a section just above a pile A, and the pipe 2 is lowered while being turned, and revolved and penetrated to the pile A. The periphery of the pile A is excavated by a cutter 13 at a front end in the sheathed pipe 2, a ring 15 hermetically seals space between the front end of the sheathed pipe 2 and the outer circumferential surface of the pile A, and the inside of the space is supplied with fresh water from an upper section while preventing the intrusion of residual slime, etc., between the sheathed pipe 2 and the pile A. When the sheathed pipe 2 is penetrated up to specified depth, a detergent is introduced into the space and the inside of the space is cleaned, and expansible high-strength fillers are pressed-into and filled into the space between the sheathed pipe 2 and the pile A extending over the upper section from a place in a lower section, thus reinforcing the pile A by the cured layer of the fillers and the sheathed pipe 2, then remodeling the pile to a pile resisting bending and shearing.
| JP5942342 | The reinforcement structure of an established structure |
| WO/2017/219079 | STRUCTURAL MAINTENANCE SYSTEM |
OKAJIMA KAZUHITO
FUNABIKI SEIJI
MAMEHATA YASUHIKO
TAISEI CORP