JP2591477Y2 - Temporary anchor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temporary anchor for retaining a retaining wall on a ground.

[0002]

2. Description of the Related Art In a conventional temporary anchor, as shown in FIG. The retaining wall A is held by the portion 12. But,
The conventional temporary anchor cannot be installed in a narrow site where the horizontal projection length L1 cannot be accommodated.

A technique for inserting a steel wire into a vent pipe for fixing a concrete structure in which the vent pipe is embedded is disclosed in Japanese Patent Application Laid-Open No. Sho 62-156422. However, such a known technique does not retain the retaining wall and does not remove the anchor material.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a temporary anchor capable of supporting a retaining wall in a relatively narrow site.

[0005]

According to the present invention, in a temporary anchor for holding a retaining wall on a ground, a boring hole (E) formed by directivity curve boring in the ground (B). Has a guide tube (5) inserted into its curved free length (3), and a plurality of anchor steel bars (1) inserted into the anchoring layer (C) at the bottom of the boring hole (E). An end is fixed to the fixing layer (C) by a grout material (D), and the anchor head 4 of the anchor bar 1 protruding from the retaining wall (A) is fixed to the pressure receiving plate (6).

[0006]

When the anchor bar is fixed to the pressure receiving plate and tension is applied, the free length is linearly deformed and the force is dispersed through the guide tube. Further, since only the anchoring portion at the lower end of the anchor bar is fixed with the grout material, it is easy to pull out and is suitable as a temporary anchor. By providing the bent guide tube in this manner, the horizontal length can be shortened even when the anchor steel bar is mounted at a sufficiently high position, which is suitable for a narrow site.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a plurality (three in the illustrated example) of anchor rods 1 are provided in a boring hole E formed in a ground B by directivity curve boring up to the bottom of a fixing layer C.
Is inserted. The straight anchoring portion 2 of the anchor bar 1 is fixed to the anchoring layer C by a grout material D, and the periphery of the curved free length portion 3 is covered with a steel pipe or a guide pipe 5 inserted into the boring hole E. Have been done. An anchor head 4 protruding from the retaining wall A of the anchor steel bar 1
Are fixed to a pressure receiving plate 6 with a nut 7 constituting an anchor head. However, a wedge may be used instead of the nut 7 as the anchor head.

[0009] Therefore, the horizontal projection length L1 can be greatly reduced compared to the horizontal projection length L1 of the conventional temporary anchor, and can be constructed in a narrow site.

Next, the operation will be described with reference to FIG.

Tighten the nut 7 and apply tension P to the anchor bar.
Is given, the free length portion 3 is moved by the chain line 3 due to the tension P.
When the guide tube 5 is not provided to be deformed linearly as in a, a force F is applied to the ground B in the direction of the center of curvature of the curve. However, since the force F is covered by the guide tube 5, these forces F are received by the highly rigid guide tube 5, are dispersed to the ground B through the guide tube 5, and deformation is suppressed.

[0012]

[Effects of the Invention] As described above, the present invention has the following excellent effects. (A) Since the tension of the anchor steel bar is applied to the curved guide pipe to disperse it in the ground, the action of the force is rational. (B) Due to the curved guide pipe, the horizontal length can be shortened even when the anchor steel bar is mounted at a sufficiently high position on the retaining wall, so that it can be applied to narrow land. (C) Since only the anchoring portion at the lower end of the anchor steel bar is fixed with the grout material, it is easy to pull out and is suitable as a temporary anchor.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a ground showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a ground for explaining an operation.

FIG. 3 is a vertical sectional view of a ground showing a conventional temporary anchor.

[Explanation of symbols]

 A: Retaining wall B: Ground C: Fixing layer D: Grout material E: Boring hole F: Force L, L1: Horizontal projection length P: Tension 1, 10 ... anchor steel bar 2, 11 ... anchoring length part 3 ... free length part 4, 12 ... anchor head 5 ... guide tube 6 ... pressure receiving plate 7 ... nut

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E02D 5/80

Claims (1)

(57) [Scope of request for utility model registration] In a temporary anchor for holding a retaining wall on a ground, a boring hole (E) formed by directivity curve boring in a ground (B) has a curved free length portion (3). ), A plurality of anchor steel bars (1) are inserted to the anchoring layer (C) at the bottom of the boring hole (E), and the ends thereof are grouted to the anchoring layer (C). The anchor head 4 of the anchor steel bar 1 fixed by the material (D) and protruding from the retaining wall (A) is a pressure receiving plate (6).
A temporary anchor, wherein the anchor is fixed to a temporary anchor.