| 摘要 |
Process and apparatus for forming a column of material in situ, such as a support pile, sand drain or well point means utilized in building construction. The apparatus includes a funnel-shaped container having a bottom discharge opening. A plow point slightly less in cross-section than the container bottom discharge opening is adapted to be supported in the discharge opening and operable for forming a column bore by impact means imparted to an elongated pusher element. The elongated pusher element is adapted to be telescopically received within the plow point for guiding the plow point during a column forming operation. A column of material is formed in situ by locating the column forming plow point at a desired location on the supporting soil surface, placing the material forming container around the plow point, interconnecting the pusher member with the plow point, filling the supply container with a quantity of material sufficient to fill a column being formed, imparting movement to the plow point means by impact force applied to the pusher member so that the plow point will penetrate the soil, transferring by gravity the column forming material in the container to progressively fill the column bore from the top downward in response to formation of the bore by movement of the plow point means. After the plow point has reached a predetermined depth within the soil, the pusher member is withdrawn from the bore allowing the additional column forming material in the container to flow by gravity into the void created by the pusher member.
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