| 摘要 |
PURPOSE:To obtain a high tensile strength by connecting an upper mechanism provided with the first and second resistance plates to a lower mechanism provided with the third and fourth resistance plates through an interlocking device, a base plate, and an upper reinforcing channel plate. CONSTITUTION:Resistance plates A-D are housed in the circumferences of base plates 10, 14, and 17, an upper pulling bar 24 is screwed with each upper rotary angular shaft 8, and they are lowered and fixed in an excavated hole. Then, a rotary angular pipe 26 is fitted into each angular shaft 8, the angular shaft 8 of the resistance plate B is turned 180 deg., the resistance plate D moving with the plate B in an interlocking manner is extended by turning clockwise, and the resistance plates A and C are likewise extended. Thus, the resistance plates A-D are extended in four directions. Furthermore, the rotary angular pipe 26 is removed, each upper pulling bar 24 is collected at the center of the hole, connecting bars 29 with connecting rings 27 and sockets 28 are connected and then the excavated hole is refilled with soil. |
