JPH1150453A - Anchorage device of ground anchor head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage in an anchor head by fallen rocks, etc., and, at the same time, to provide an chorage device of a ground anchor head capable of installing a concrete block on the surface of slope with a simple method. SOLUTION: A platform 6 is constituted of a recessed anchor head storing body 2 for storing a ground anchor head, a tension material inserting cylinder 3 provided to the lower surface of the anchor storing body 2, a holding plate 4 provided to the lower end face of the tension material inserting cylinder 3 and a reinforcing rib 5 provided between the holding plate 4 and anchor head storing body 2 plane radially. A pressure holding plate 7 is provided to the holding plate 4 of the platform 6 in a detachable manner, and a cover body 8 for closing an upper opening section is provided to the anchor head storing body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for a head of a ground anchor.

[0002]

2. Description of the Related Art In recent years, slope anchoring methods have been widely used to prevent collapse of slopes. This is because, as shown in FIG.
The concrete block 21 is fixed by an anchor 23 such as a PC steel wire cast on the ground, and the head 24 of the anchor is mounted on the upper surface of the concrete block 21. It was prominently established.

[0003]

When the head of the anchor protrudes from the upper surface of the concrete block and is fixed as described above, there is a risk that the anchor may be damaged by falling rocks, or even if the anchor is not damaged, the landscape is impaired. there were. In addition, the slope anchor method is a very large and dangerous work because concrete blocks are lifted by a crane and installed on the slope after anchors such as PC steel wires are cast on the ground. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to prevent a head of an anchor from being damaged by falling rocks and the like, and to make a concrete block a slope by a simple method. An object of the present invention is to provide a fixing device for a head of a ground anchor which can be installed.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a ground anchor head fixing device includes a concave anchor head housing for housing a ground anchor head, and a lower surface of the anchor head housing. And a receiving plate provided on the lower end surface of the tensile material insertion cylinder,
A pedestal is formed from the receiving plate and the reinforcing ribs provided in a plane radial manner between the anchor head container, and a pressure receiving plate is detachably provided on the receiving plate of the pedestal. A lid for closing the opening is provided.

[0006] Since the fixing device is lightweight, it is excellent in workability.

[0007] Since the head of the ground anchor is housed and fixed in the concave anchor head housing, damage due to falling rocks can be prevented and the scenery is not spoiled.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fixing device for a head of a ground anchor (hereinafter simply referred to as a fixing device) will be described below in detail with reference to the drawings. 1 is a front view of the fixing device, FIG. 2 is a plan view thereof, and FIG. 3 is a cross-sectional view.

The fixing device 1 includes an anchor head container 2 and
It comprises a pedestal 6 composed of a tensile material insertion tube 3, a receiving plate 4, a reinforcing rib 5, and a pressure receiving plate 7. The fixing device 1 is made of a steel plate, a cast product, a plastic, or the like. When the fixing device 1 is made of a plastic, there is no rust, so that the fixing device 1 has excellent durability.

The anchor head housing 2 is a flat rectangular box having an upper surface opened, and extends outwardly toward the upper surface. A lid 8 for closing the upper surface opening is provided with a flange 10 with bolts 10. It can be attached with.

A tension member insertion tube 3 is attached to the bottom surface of the anchor head housing 2, and a receiving plate 4 is attached to the lower end surface of the tension member insertion tube 3. Holes 11 having the same diameter as the inner diameter of the tensile material insertion tube 3 are opened in the lower surface of the anchor head housing 2 and the receiving plate 4 so that the tensile material 12 can be inserted into the anchor head housing 2. Has become.

A reinforcing rib 5 is provided radially between the receiving plate 4 and the anchor head housing 2 to support the tension applied to the anchor head housing 2.

A flat octagonal pressure receiving plate 7 is detachably attached to the receiving plate 4 with bolts 13 so that it can be attached or detached as necessary.

FIG. 7 shows a state in which the above-mentioned fixing device 1 is installed on the slope 14. The concrete block 15 is formed of cast-in-place concrete, and the anchor head 17 is housed in the anchor head housing 2. To prevent damage from falling rocks.

Hereinafter, a reverse winding method using the fixing device will be described with reference to FIG. First, as shown in (1), the first step of the slope 14 is excavated, and the anchor hole 16 is dug to grout. P to this grout
The tensile member 12 such as a C steel wire is inserted and cured, and when a predetermined force is generated, the fixing device 1 is installed and temporarily tensioned.

Next, as shown in FIG.
In the same manner as described above, the second step of No. 4 is excavated, the anchor hole 16 is dug, a grout is cast, a tensile material 12 such as a PC steel wire is inserted into the grout, and the grout is cured. Is established, the fixing device 1 is installed and a temporary tension is applied. Then, as shown in (3) of the figure, the third step of the slope 14 is also excavated, and the fixing device 1 is installed and temporarily tensioned in the same manner as described above.

After the fixing device 1 is installed on the excavated slope 14 and temporarily tensioned, as shown in (4) in the figure, cast-in-place concrete is poured between these fixing devices 1. When the concrete block 15 is formed, the anchor head 17 is housed below the surface of the concrete block 15 and is covered by the lid 8, so that the anchor head 17 may be damaged even if a rock falls. Absent.

FIG. 9 shows a plan view of the slope 18 constructed by the above-mentioned reverse winding method, whereby the slope 14 can be prevented from collapsing.

[0019]

As described above, the fixing device is lightweight, so that it can be easily handled and has excellent workability.

Since the head of the ground anchor is housed in the anchor head housing and the anchor head housing is closed by the lid, damage due to falling rocks and the like can be prevented and the scenery is not impaired.

[Brief description of the drawings]

FIG. 1 is a front view of a fixing device.

FIG. 2 is a plan view of the fixing device.

FIG. 3 is a cross-sectional view of the fixing device.

FIG. 4 is a sectional view taken along line aa of FIG. 3;

FIG. 5 is a sectional view taken along line bb of FIG. 3;

FIG. 6 is an exploded sectional view of the fixing device.

FIG. 7 is a sectional view illustrating a use state of the fixing device.

FIG. 8 is a sectional view of a reverse winding method using a fixing device.

FIG. 9 is a plan view of the constructed legal frame.

FIG. 10 is a sectional view of a conventional slope anchor method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing apparatus 2 Anchor head accommodating body 3 Tensile insertion tube 4 Receiving plate 5 Reinforcement rib 7 Pressure receiving plate 8 Lid 9 Flange 10, 13 Bolt 11 Hole 12 Tensile material 14 Slope 15, 15 Concrete block 16 Anchor hole 17 Anchor head 18 law frame

Claims (1)

[Claims] A concave anchor head housing for accommodating a head of a ground anchor, a tension member insertion tube provided on a lower surface of the anchor head container, and a lower end surface of the tension member insertion tube. A pedestal is constituted by a receiving plate and reinforcing ribs provided in a plane radial manner between the receiving plate and the anchor head housing, and a pressure receiving plate is detachably provided on the receiving plate of the pedestal. A fixing device for a head of a ground anchor, wherein a lid is provided on the body to close an upper opening.