JP3054667B2 - Anchor pedestal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground anchor base.

[0002]

2. Description of the Related Art The ground anchor method, which utilizes the excellent properties of PC steel and strengthens the ground by introducing prestress into the ground, is widely used in landslides and earth retaining works.

FIGS. 5 to 10 show the outline of this ground anchor method. As shown in FIG. 5, a ground is drilled with a drill pipe 3 having a tip bit 2 using an excavator 1 such as a rotary percussion machine. Then, after the completion of the drilling as shown in FIG. 6, the tensile steel 4 made of PC steel is inserted into the drill pipe 3 as shown in FIG.

As shown in FIG. 8, grout material 6 is injected under pressure while extracting a drill pipe 3 with an extractor 5 while leaving a tip bit 2.

As shown in FIG. 9, a pedestal 7 is attached, a tension jack 8 is set on the pedestal 7, and tension is applied. As shown in FIG. 10, the tension jack 8 is fixed by an anchor plate 9 as a support plate or a fixing jig. Fixing is performed in place of a head fixing member such as a certain anchor head.

As shown in FIG. 4, the pedestal 7 to which the anchor is set after the anchor has been set has a straight load receiving surface 10 as shown in FIG. And a substantially triangular plate 11 having a hypotenuse that falls. In this plate 11, the upper oblique side (load receiving surface 10) and the lower oblique side intersect near the center to form a substantially triangular shape.

[0007] The steel plates 11 are parallel to each other with a space between them, fixed by welding on the belly material 12, and the anchor plate 9 is placed on the load receiving surface 10. A fixing jig 13 such as an anchor head is arranged thereon.
19 in the figure is a retaining wall.

[0008]

The thickness of the pedestal 7 is determined by the anchor load. The shape and thickness of the pedestal 7 vary depending on the angle of the anchor and the load.
Was manufactured separately for each site and was disposable after use.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned disadvantages of the prior art, to be able to cope with a change in the anchoring angle of the anchor, to be versatile, to be diverted, and to contribute to resource saving. To provide a pedestal.

[0010]

In order to achieve the above object, the present invention firstly provides two substantially triangular plates with an upper oblique side and a lower oblique side intersecting in the vicinity of the center. In an anchor receiving stand which is fixed by welding on an upright material by welding, most of the oblique side of the plate is curved to form a load receiving surface as a convex spherical surface, and is disposed on this load receiving surface. The joint surface of the anchor plate to the load receiving surface is formed as a concave spherical surface having a curvature corresponding to the convex spherical surface so as to be slidable on the load receiving surface. Second, the plate has one side of the load receiving surface, It has a substantially triangular shape having a hypotenuse falling at an angle, and the gist is that a horizontal connecting piece is laid over the parallel plate on the parallel plate.

[0011]

According to the present invention, the load receiving surfaces of the anchor plate and the anchor receiving base have curved surfaces, and the anchor plate can be slid on the load receiving surface to freely adjust the driving angle. If the thickness of the member is designed at the upper limit of the general anchor load, the load receiving surface of this anchor support is formed by bending most of the oblique side at the top of the plate. Since the moving range can be made large vertically, it is possible to cope with a wide range of driving angles and loads, so that diversion is possible. In addition, since the load receiving surface of the anchor receiving base has a relatively large curvature due to a large circle, even if the fixing position of the anchor plate is slightly shifted, it can be said that it is safe.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing an embodiment of an anchor base of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a side view in the middle of setting, and the same components as those of the conventional example shown in FIG. The reference numerals are used.

In the figure, reference numeral 19 denotes a mountain retaining wall, and 12 denotes a bulging material 12 laid thereon. The pedestal 7 of the present invention is fixed on the bulging material 12 by welding as in the prior art. An anchor receiving stand 14 was formed by the two plates 11 standing upright.

The belly material 12 has a substantially triangular shape in which the upper oblique side and the lower oblique side intersect in the vicinity of the center. Is formed on the convex spherical surface 15 and this load receiving surface
The load receiving surface 10 of the anchor plate 9 placed on
A concave spherical surface 16 having a curvature commensurate with the convex spherical surface 15 was used as the bonding surface.

The plate 11 has the same load receiving surface 10 as in the prior art, and has a hypotenuse that falls at an appropriate angle from the same, and the upper oblique side and the lower oblique side of the load receiving surface 10 intersect near the center. Although it forms a substantially triangular shape, a horizontal connecting piece 17 is laid over the parallel plate 11 on this hypotenuse, and the width of the joining surface 18 of the belly material 12 is made of the H-shaped steel forming the belly material 12. Set larger so that it can be larger or smaller.

The material of the plate 11 and the anchor plate 9 is preferably steel (SS41 or the like), but a light alloy or the like may be used.

In this manner, the anchor plate 9 is slidable on the load receiving surface 10, and the anchor plate 9
Is appropriately moved so as to match the setting angle θ of the tensile steel material 4 and set spot welding is performed (see FIG. 3).

Then, the fixing jig 13 is set, and tensioning and fixing are performed by the tension jack 8.

[0019]

As described above, the pedestal of the anchor according to the present invention can cope with a change in the angle at which the anchor is driven, has versatility, and can be diverted, thereby contributing to resource saving. Things.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of an anchor base of the present invention.

FIG. 2 is a front view showing an embodiment of the anchor base of the present invention.

FIG. 3 is a side view of the anchor of the present invention in the middle of setting.

FIG. 4 is a side view of a base of a conventional anchor.

FIG. 5 is a side view of a first step showing an outline of a ground anchor method.

FIG. 6 is a side view of a second step showing the outline of the ground anchor method.

FIG. 7 is a side view of a third step showing an outline of the ground anchor method.

FIG. 8 is a side view of a fourth step showing an outline of the ground anchor method.

FIG. 9 is a side view of a fifth step showing an outline of the ground anchor method.

FIG. 10 is a side view of a sixth step showing an outline of the ground anchor method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drilling machine 2 ... Tip bit 3 ... Drill pipe 4 ... Tension steel 5 ... Extractor 6 ... Grouting material 7 ... Pedestal 8 ... Tension jack 9 ... Anchor plate 10 ... Load receiving surface 11 ... Plate 12 ... Belly rising material 13 ... Fixing jig 14 ... Anchor pedestal 15 ... Convex spherical surface 16 ... Concave spherical surface 17 ... Side connecting piece 18 ... Joint surface 19 ... Yamadome wall

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 5/80 E02D 5/74

Claims (2)

(57) [Claims] 1. An anchor cradle in which two oblique sides of an upper side and a lower side intersect in the vicinity of a center and form a substantially triangular plate in parallel and spaced apart from each other by welding on an abdominal material. In the above, the load receiving surface is formed as a convex spherical surface by bending most of the oblique side of the upper part of the plate, and the joint surface of the anchor plate disposed on the load receiving surface to the load receiving surface has a curvature corresponding to the convex spherical surface. An anchor pedestal, characterized in that the concave sphere is slidable on a load receiving surface. 2. A plate having a load receiving surface as one side and a substantially triangular shape having a hypotenuse falling at an appropriate angle from the side, and a horizontal connecting piece is laid over the parallel plate on the hypotenuse. Anchor pedestal as described.