| 摘要 |
PURPOSE:To easily couple anchoring iron bars by a method in which cylinders are inserted and arranged in a face-to-face contact manner in a pit, an anchoring iron bars and mobile iron bars are inserted, adjacent cylinders are orderly pulled up sequentially while placing concrete, and the mobile iron bars are rocked by their own weight. CONSTITUTION:A round pit (h) is drilled in the ground by an earth drill, etc., a cylinder A having a notched circular cross section, serving as a guide face for the next cylinder, is inserted into the pit (h), and then the next pit is drilled under the guidance of the notched circular face for an earth drill. Then, the second cylinder A with a deficient circular face is inserted under the guidance of said deficient circular face, and by the same procedure, a desired number of cylinders A are arranged in a face-to-face contact manner. Then, one end of bar-shaped mobile iron bars 2 are supported in rocking manner on caged anchoring iron bars 1, the iron bars 1 and 2 are inserted into the cylinders A, adjacent cylinders A are orderly pulled up while placing concrete, and adjacent iron bars 1 are coupled with the iron bars 2. |
