Internal Fixer For Anchor Having Releasable Tensioning Steel Wire

Abstract

The present invention provides an internal fixer for an anchor having a releasable tensioning steel wire. The internal fixer of the present invention includes a first outer body (10), which is provided with a tube coupling hole (11), a body seating hole (13) and a wedge receiving body support means; and a wedge receiving body (30), which is seated in the body seating hole (13) and has a conical wedge seating hole (31), into which separated wedge bodies (41) are seated. The internal fixer further includes a wedge unit (40), which is seated in the wedge seating hole (31) of the wedge receiving body (30) and comprises the three separated wedge bodies (41); and a second outer body (20), which supports and covers both the wedge receiving body (30), which is seated in the body seating hole (13), and the wedge unit (40), which is placed in the wedge seating hole (31).

Description

TECHNICAL FIELD[0001]The present invention relates, in general, to internal fixers for anchors having releasable tensioning steel wires and, more particularly, to an internal fixer for an anchor having a releasable tensioning steel wire in which, when the tensioning steel wire is tensioned, a wedge receiving body along with separated wedge bodies is moved in the direction in which the tensioning steel wire is tensioned, and is fastened, so that the space required for movement of a wedge unit when the tensile force is removed is ensured, and in which only the separated wedge bodies are moved backwards by repulsive force generated when the tensile force is removing from the tensioning steel wire in the fixed state of the wedge receiving body, or by both the force of striking the tensioning steel wire inwards and the restoring force of a spring, and they are separated in the diameter direction, so that the tensioning steel wire can be easily and reliably removed.BACKGROUND ART[0002]Gen...

AI Technical Summary

Benefits of technology

[0017]In the internal fixer for an anchor having a releasable tensioning steel wire according to the present invention, when the tensioning steel wire is tensioned after the internal fixer has been installed in the ground, a wedge receiving body along with a wedge unit is moved in the direction, in which the tensioning steel wire is tensioned, and is fastened, so that the space required for movement of a wedge unit when the tensile force is removed is reliably ensured. Furthermore, only the separated wedge bodies are moved backwards and expanded in diameter by repulsive force generated when the tensile force of the tensioning steel wire is removed when the wedge receiving body is in a fixed state, or by the force of striking the tensioning steel wire inwards, so that the tensioning steel wire can be easily and reliably removed.

[0018]As well, a wedge returning member is additionally provided at a lower position in a body receiving hole of a first outer body, so that, when the tensioning steel wire is cut to remove it after having been tensioned, the wedge returning member pushes the wedge unit backwards from the wedge seating hole of the wedge receiving body, thus the separated wedge bodies of the wedge unit are separated in a diameter direction, thereby the tensioning steel wire is easily released.

[0019]In addition, when the tensioning steel wire is inserted into the internal fixer, the separated wedge bodies are pushed backwards from the wedge seating hole of the wedge receiving body and expanded in diameter, so that the end of the tensioning steel wire is inserted into the separated wedge bodies and, thereafter, when the force that has been applied to the tensioning steel wire is removed, the separated wedge

Problems solved by technology

However, in the case that other engineering work is being conducted adjacent to the area in which the ground anchor is installed, because the tensioning steel wire has six times the strength of a typical steel wire per unit area, an excavator and a boring machine may be damaged, and the construction period may be increased.

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