| 摘要 |
PROBLEM TO BE SOLVED: To install a core material into the ground by using a core material element to which reaming is not applied.SOLUTION: In order to correct the inclination of an upper core material element added to a lower core material element first installed in the ground by temporary fastening, two erection pieces corresponding to the core material elements are mounted, an actuator is mounted to the corresponding erection piece and by operating the actuator, while using one erection piece as a reaction support, an external force is imparted to the other erection piece. |
