| 摘要 |
PURPOSE:To permit an anchor to be drawn out with a small force by melting fibers by electric heating when removing the anchor by a method in which a tension member made of aromatic polyamide fiber is used for anchors in natural ground and an electric heating wire is set on the tip of the tension member. CONSTITUTION:An electric heating wire 5 is attached to the tip of a tension member 4 made of aromatic polyamide fibers for the natural ground anchor 3 to supply electric current to it from the surface of the natural ground. In removing the anchor 3, the wire 5 is electrically energized to thermally decompose or melt the tension member 4 to separate the anchor from the fixed part. The tension member 4 can thus be pulled out with small forces.
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