Earth anchor and method of setting and removing same
US4132498A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 14, 1978 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Feb 14, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D5/765
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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 At the time of removing the anchor, the edge shaped breaking means is withdrawn by pulling the tension steel member with a jack or the like.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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.