Earth anchor and method of setting and removing same

Details Earth anchor and method of setting and removing same Earth anchor and method of setting and removing same

1978-02-14

1979-01-02

Shapiro, Jacob

Hydraulic and earth engineering

Marine structure or fabrication thereof

With work deck vertically adjustable relative to floor

405284, E02D 574

Patent

active

041324986

ABSTRACT:
An anchor removing device is constituted by providing a wedge shaped breaking means tapered in the drawing-out direction, which is temporarily secured to the tip portion of an anchor steel member and a tension steel member encompassed with sheath coupled to the wedge shaped breaking means. After this anchor removing device has been inserted into anchor hole which is bored in the ground, a hardenable filler material is injected into the anchor hole to form an anchor body. The hardenable filler material may produce voids or contains a foreign material of a low rigidity, which produces the effect similar to that of voids, such as air bubbles. The material may be foamable polystyrene and a cork of a given porosity. Typical example of the hardenable filler material is a foamed concrete milk. At the time of removing the anchor, the edge shaped breaking means is withdrawn by pulling the tension steel member with a jack or the like. Simultaneously with the withdrawal of the wedge shaped breaking means, the breaking means will break the anchor body covering same, thereby detaching the anchor body from the anchor steel member.

REFERENCES:
patent: 3754401 (1973-08-01), Lipow
patent: 4000623 (1977-01-01), Meardi
patent: 4069677 (1978-01-01), Yamada et al.

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