| 摘要 |
PURPOSE:To facilitate disposal of surplus coil, by a method wherein, before a pile hole is excavated, an amount of soil being surplus when a precast pile is inserted into the pile hole is calculated, a ground improving agent is mixed, and the precast pile is inserted. CONSTITUTION:Before a pile hole is excavated by means of an excavating device, an amount of soil discharged is previously calculated. With the excavating device 16 being actuated, a pile hole 23 is excavated down to a given depth, and oil in a condition, in that it is loosened within the hole 23, is discharged to a ground surface with the aid of a screw. After a previously calculated amount of soil 22 is discharged to a ground surface, the excavating device 16 is lifted up, and a ground improving agent is mixed from the forward end thereof. Thereafter, a precast pile 26 is inserted into the pile hole 23 to complete a work. Since soil discharged from the pile hole 23 is free of mixture of the ground improving agent, the above mentioned process facilitates disposal of the soil. |
