| 摘要 |
PURPOSE:To strengthen the foot protection of an underground pile by a method in which a cylinder for a pile and an earth auger, after reaching a given depth, are pulled up, and a solidifying agent is injected and pressed down under the condition that soil and sand are left in the cylinder for pile. CONSTITUTION:After a cylinder 1 for a pile is penetrated to a given depth while excavating the ground by an earth auger 5, the cylinder 1 and the earth auger 5 are pulled up while injecting cement milk (a). Afterwards, the rotation of the cylinder 1 and the earth auger 5 are stopped, and under the condition that excavated soil is left in the cylinder 1, the cylinder 1 is repenetrated to an initial penetration depth. When the earth auger 5 is then pulled up, the cylinder 1 and the ground are integrately combined by cement milk (a) pressingly supplied to the ground at the tip of the pile, and thereby the foot protection of the pile can be exactly completed. |
