| 摘要 |
An anchoring device for anchoring a shaft in relatively hard ground including an elongated shaft having a ground penetration member. The penetration member includes a coiled extension portion extending longitudinally beyond the shaft lower end to facilitate penetration of the ground when rotated in one direction. The coiled length of the extension portion is sufficiently short to resist substantial uncoiling of the coiled extension portion during penetrating movement into the relatively hard ground. In another aspect, a retaining device is provided for selective penetration of the ground at a second location spaced-apart from the first location to substantially prevent rotational movement of the shaft about the longitudinal axis for removal thereof from the ground.
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