| 摘要 |
PROBLEM TO BE SOLVED: To exhibit strength of a column created in ground after execution of preceding water excavation.SOLUTION: Ground G is excavated while water 10 is jetted by using an excavation rod 3; the excavation rod 3 is pulled up from an excavated hole 4; ground property improving treatment, in which a water-absorbing powdery body 20 is charged into the excavated hole 4 and hardened by absorbing the water 10 in the excavated hole 4, is performed; the ground G after the ground property improving treatment is excavated; and excavated soil and the like are mixed with a hardener in the excavated hole 4 to form a column. |
