| 摘要 |
PURPOSE:To enable shortening of a whole work, by a method wherein a soil recovery tank is mounted to the opening at the upper end of a precast hollow pile, and the precast hollow pile is inserted as fluid soil of a vertical fluid soil layer is carried in the tank. CONSTITUTION:In order to form a vertical fluid soil layer, soil crushed by a rotary cutter 19b, is fluidized, and a cutting tool 19 is penetrated in the ground. A soil peripheral wall 21 is normally pressed with fluid soil (m) to prevent collapse of the soil peripheral wall 21, and a precast pile B is smoothly inserted. The interior of a tank body 2 of a soil recovery tank 1 is in a negative pressure, and as the fluid soil (m) in the tank body 2 is forcibly sucked, the precast pile B is rapidly suck under gravity. This eliminates waste disposal of bentonite-mixed soil, prevents a ground surface from being polluted by fluid soil, and enables simple post-disposal of the fluid soil. |
