| 摘要 |
PURPOSE:To remove out PC steel wires by a method in which a removable main body having a blade on its periphery is provided to an anchor body in advance, the removable main body is pulled out after using the anchor and broken, and the bonding between fixing PC steel wires and cement mortar is released. CONSTITUTION:After using an earth anchor, the tensile force of a PC steel wire 17 fixed to the anchor head 27 is released, a removable PC steel wire 30 is inserted into the anchor body 14, and a male screw 30a provided at the tip is connected with the female screw 15d of a removable main body 15. When the main body 15 is pulled up through the PC steel wire 30 by a jack, a vinyl chloride tube 16 is broken by the main body 15, the anchor body consisting of the PC steel wire 17 and the cement mortar 13 is expanded and broken by the wedge action of the inclined part 15b of the main body 15, and the anchor body is cracked by the blade 15a. Therefore, the bonding between the PC steel wire 17 and the cement mortar 13 is broken and the steel wire 17 can thus be easily pulled out. |
