JP2586052Y2 - 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 an anchor pedestal capable of compensating for a deviation in angle between an anchor head and a target structure in ground anchor work.

[0002]

2. Description of the Related Art For example, in ground anchor work, an anchor tension member such as a PC steel strand which has been tensioned by a tensioning device or the like is tensioned at a predetermined load by a fixing tool comprising a combination of an anchor head and a fixing wedge. It is fixed to the ground via an anchor plate (support plate) while it is kept.

Here, a pair of anchor pedestals for compensating for the deviation of the angle of the anchor head (fixing device) with respect to the anchor plate and fixing the anchor head in a stable state is interposed between the anchor plate and the anchor head, for example. I have. The pair of anchor pedestals formed separately at the upper portion and the lower portion are formed to have non-uniform thicknesses formed by slopes with respect to the base surface. For example, both slopes are opposed to and joined to each other. The anchor pedestal is configured to be able to compensate for a shift in the angle of the anchor head with respect to the anchor plate by an angle change between the base surfaces of the upper pedestal and the lower pedestal, which is obtained by a difference in a combination position due to rotation or the like. .

[0004]

However, in the known construction, the upper pedestal and the lower pedestal having non-uniform thicknesses are merely combined and interposed between the anchor head and the target structure. Tension of the PC stranded wire (anchor tensile member) under a load may cause displacement of the anchor pedestal with respect to the anchor head and the like, and displacement between the upper and lower portions of the anchor pedestal.

[0005] The anchor pedestal is usually formed of concrete or the like so as to withstand the load for pulling the PC strand, but the anchor pedestal made of concrete or the like is heavy and imposes a heavy burden on the operator. In addition, it is difficult to install the PC steel stranded wire at right angles to the PC stranded wire due to misalignment at the time of work, and the PC stranded wire may be damaged, which is not preferable in terms of safety.

An object of the present invention is to provide an anchor pedestal that ensures the safety and reliability of an anchor tension member such as a PC steel strand and improves workability.

[0007]

In order to achieve this object, according to the present invention, a specific thickness required for receiving a component force generated from an oblique angle when the anchor tension member is tensioned,
A rigid support pipe is formed so that an anchor tension member can be inserted into the interior of the support pipe, and can be in contact with the periphery of the target structure under insertion into the anchor hole, and is perpendicular to the base surface of the upper pedestal. It is arranged, and is integrally provided on the slope side with one end fixed to the peripheral edge of the insertion hole. Further, a through hole is formed in the lower pedestal in a direction orthogonal to the base surface so that the support pipe can be freely inserted at any combination position of the upper pedestal and the lower pedestal.

[0008] Then, the support pipe is inserted into the anchor hole through the through hole of the lower pedestal, and the slope of both the upper pedestal and the lower pedestal in a state where it can be in contact with the periphery of the anchor hole of the target structure. The angle between the base surfaces of the upper pedestal and the lower pedestal can be arbitrarily adjusted under the engagement of the radial irregularities formed on the upper pedestal.

[0009]

According to this structure, the support pipe separates the anchor pedestal from the anchor tension member and prevents the upper pedestal and the lower pedestal from being displaced by the engagement of the unevenness.
Safety of PC strands can be ensured. Since the rigid support pipe receives the component force of the load acting on the anchor pedestal, the concentration of the load on the anchor pedestal is sufficiently suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the anchor pedestal 10 according to the present invention comprises a separated upper pedestal 12 and lower pedestal 13.
Are formed by a combination of

As can be seen clearly from FIG. 1, the upper pedestal 12 and the lower pedestal 13 of the anchor pedestal are not uniform in thickness, that is, the slopes 12b, 13 inclined with respect to the base surfaces 12a, 13a.
b having a different maximum and minimum thickness. Usually, a fixing device such as an anchor head fixed to an anchor tensile material 16 such as a PC steel strand.
18 and, for example, a concrete pressure plate 22 of a target structure 20 such as the ground, the slopes 12b and 13b are combined to face each other to form an upper pedestal 12, a lower pedestal 13, that is, an anchor pedestal.
10 are located.

An anchor is provided by, for example, a change in the angle of the base surface 13a of the lower pedestal with respect to the base surface 12a of the upper pedestal in accordance with a change in the combination position (angle) of the upper pedestal 12 and the lower pedestal 13 due to rotation or the like. The anchor base 10 is configured so that the angle between the head (fixing device) 18 and the target structure 20 can be adjusted.

The angle adjustment range of the anchor base 10 is, for example, about 0 to 30 °.
In particular, such an anchor pedestal 10 is used, for example, under a combination angle where a large force is applied.

Here, as can be seen from FIG. 2, the slopes 12b, 13b of the upper pedestal 12 and the lower pedestal 13 are formed as radially uneven surfaces that can mesh with each other. In such a configuration, as shown in FIG. 1, the arrangement in which the slopes 12b and 13b face each other causes the unevenness to mesh with each other to prevent slippage, so that the displacement of the anchor pedestal 10 relative to one with respect to the other is reliably prevented. Is done.

Therefore, the base surfaces 12a, 13 of the upper pedestal and the lower pedestal
The angle between a can be kept constant, and the stability of the anchor head 18 with respect to the target structure 20 is further improved.

Here, as shown in FIGS. 1 and 2, in the present invention, the support pipe 24 is disposed at right angles to the base surface 12a of the upper pedestal and extends from the slope 12b.
It is provided integrally with the upper pedestal 12. Support pipe 24
Is attached to the upper pedestal 12 by, for example, fitting one end thereof into the through-hole 26 of the upper pedestal and fixing the terminal and the base surface 12a to the periphery of the through-hole in a flush state.

The support pipe 24 is a rigid pipe member having an inner diameter capable of inserting at least the PC steel strand (anchor tension member) 16, for example, having a specific thickness corresponding to the required rigidity and preventing rust. It is formed from a treated stainless steel pipe member.

A through hole through which the support pipe 24 can be loosely inserted.
28 are drilled in the lower pedestal 13. The through-hole 28 is formed, for example, in a direction perpendicular to the base surface 13a, at any angle of combination of the upper pedestal 12 and the lower pedestal.
It has a large enough diameter to guarantee 24 insertions.

As shown in FIG. 1, the upper pedestal 12 and the lower pedestal 13 of such an anchor pedestal are assembled by loosely inserting a through hole 28 by a support pipe 24, and the support pipe is inserted into an anchor hole 30 of a target structure. It is further inserted and placed. Then, at a position adjacent to the upper pedestal 12, the anchor head 18
The PC stranded wire is fixed to the PC stranded wire 16 and fixed while maintaining a specific load.

That is, according to the present invention, the support pipe 24
Are continuously inserted into the insertion hole 28 of the lower pedestal and the anchor hole 30 of the target structure, so that both the upper pedestal 12 and the lower pedestal 13 are held under the engagement between the support pipe and the anchor hole. You. Therefore, even before a predetermined load is applied to the PC steel strand 16, it is possible to reliably prevent the anchor pedestal 10 from dropping or shifting with respect to the anchor hole 30 of the target structure under a light force.

Accordingly, the weight burden on the worker can be reduced, and the workability during the work of arranging the anchor base 10 is sufficiently improved.

Since the PC steel strand 16 is isolated from the anchor pedestal 10 by the support pipe 24, even if the anchor pedestal is displaced from the PC steel stranded wire, the anchor pedestal contacts the PC steel stranded wire. Is prevented. Therefore, the anchor pedestal 10 does not damage the PC steel strand 16,
The safety of the PC strand is sufficiently ensured.

Here, in the present invention, the support pipe 24 is formed so as to be able to contact the periphery of the anchor hole 30 of the target structure, and the support pipe integral with the upper pedestal 12 is connected to the anchor hole 30 of the target structure. The lower pedestal 13 comes into contact with the support pipe when the load is applied to the anchor pedestal 10 due to the tension of the PC steel stranded wire 16 and is supported on the rim of the anchor hole. Due to the contact of the pipe, a component force Fa as shown in FIG. 1 is generated in the support pipe. That is, the rigid support pipe 24 bears and receives the component force Fa of the load from the PC steel strand 16 acting on the anchor pedestal 10 via the anchor head 18, and further contacts the peripheral edge of the anchor hole 30. The load Fb from the PC stranded wire is dispersed by escaping into the anchor hole under the
Concentration can be prevented.

For this reason, the upper pedestal 1 can be mounted without deteriorating its function as the anchor pedestal 10 and its safety.
2. The hardness of the lower pedestal 13 can be reduced. That is,
The anchor pedestal 10 of the present invention is not limited to the known concrete and the like, and the anchor pedestal 10 of the present invention uses a synthetic resin material, which was conventionally difficult in terms of strength and rigidity, as the material of the upper pedestal 12 and the lower pedestal 13 of the anchor pedestal. It becomes possible.

If the upper pedestal 12 and the lower pedestal 13 are formed into a predetermined shape from a synthetic resin material, the weight of the anchor pedestal itself is reduced. Is further improved.

In the embodiment, a stainless steel pipe member is exemplified as the support pipe 24. However, the support pipe 24 is a rigid pipe member having an inner diameter through which the PC stranded wire 16 can be inserted. The support pipe may be formed from other hard pipes, as long as the support pipe is formed. However, if a pipe member made of a rust-resistant material such as stainless steel is used as the support pipe 24, deterioration due to rust and the like can be reliably prevented, and the weight can be suppressed despite sufficient rigidity, so that safety is improved. Above.

In the embodiment, the upper pedestal 12 and the lower pedestal 13 of the anchor pedestal are made of a synthetic resin material. However, the upper pedestal 1 is made of resin concrete or the like.
2. The lower pedestal 13 may be formed.

Further, the present invention is not limited to a configuration in which both the upper pedestal 12 and the lower pedestal 13 are molded from a synthetic resin material.
Only one of the pedestals may be formed from a synthetic resin material, and this may be combined with the other pedestal made of resin concrete or the like to form the anchor pedestal 10. With such a configuration, high rigidity of the anchor base 10 can be ensured, and the weight of the anchor base itself can be reduced.

The embodiment described above is for explaining the present invention, and does not limit the present invention in any way.
It goes without saying that all modifications and alterations within the technical scope of the present invention are included in the present invention.

[0031]

As described above, according to the anchor pedestal according to the present invention, the anchor pedestal can be mounted under a small force by inserting the rigid support pipe into the anchor hole of the target structure. Since it can be held against an object and the weight burden on the worker is reduced, the work of arranging the anchor base is facilitated, and the workability is improved.

Since the support pipe integrated with the upper pedestal is continuously inserted into the through hole of the lower pedestal and the anchor hole of the target structure, the displacement of the anchor pedestal with respect to the anchor tension member is reliably prevented. Therefore, damage or the like due to the contact of the anchor pedestal with the anchor tension member can be reliably prevented, and the safety of the anchor tension member is ensured.

In addition, the load component from the anchor tensile member acting on the anchor pedestal is borne by a support pipe integral with the upper pedestal and having a specific thickness and rigidity required to receive this component force. Thereby, concentration of the load on the anchor pedestal can be prevented, so that the hardness of the anchor pedestal can be reduced without lowering the functionality and the safety thereof. Therefore, the synthetic resin material can be used as the material of the anchor pedestal, and the workability is further improved by making the anchor pedestal lighter.

Further, since the upper pedestal and the lower pedestal are formed with concave and convex surfaces which can be engaged with each other, the displacement between the upper pedestal and the lower pedestal can be reliably prevented. Can be secured. Therefore, the stability of the anchor head with respect to the target structure is further improved, and safety can be secured from this point as well.

If the support pipe is formed from a rust-prevented pipe member, rust hardly occurs, so that deterioration due to rust or the like can be surely prevented, which is preferable in terms of safety.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an anchor pedestal according to the present invention when assembled and used.

FIG. 2 is a schematic perspective view of an anchor base in a state where an upper base and a lower base are disassembled.

[Explanation of symbols]

 10 Anchor pedestal 12 Upper pedestal 13 Lower pedestal 12a, 13a Base surface 12b, 13b Slope 16 PC stranded wire (anchor tension material) 18 Anchor head (fixing tool) 20 Target structure 24 Support pipe 26 Insertion hole 28 Through hole 30 Anchor Hole

Claims (1)

(57) [Scope of request for utility model registration] A combination of a pair of upper pedestals and a lower pedestal having a non-uniform thickness having a base surface and a slope with respect to the base surface;
An anchor head to the surface of the target structure is formed by disposing the inclined surfaces of the target structure and the anchor head fixing device that holds the tension member anchored in the anchor hole of the target structure in a tensioned state, with the inclined surfaces facing each other. In the anchor pedestal that compensates for the deviation of the angle of the fixing device, the support pipe having the specific thickness and rigidity required to receive the component force generated from the oblique angle when the anchor tension material is tensioned, It is formed so that it can be inserted inside, and can contact the periphery of the target structure under insertion into the anchor hole, and is disposed at right angles to the base surface of the upper pedestal, and one end to the periphery of the insertion hole is formed. A through-hole that is integrally projected on the slope side under fixation, and through which the support pipe can be freely inserted at any combination position of the upper pedestal and the lower pedestal, is provided in a direction perpendicular to the base surface. The support pipe is inserted into the anchor hole through the through hole of the lower pedestal in a state where the support pipe can be in contact with the peripheral edge of the anchor hole of the target structure, and both the upper pedestal and the lower pedestal are drilled in the seat. An anchor pedestal wherein the angle between the base surfaces of the upper pedestal and the lower pedestal can be arbitrarily adjusted under the engagement of radial irregularities formed on the slope.