JP2799678B2 - 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 guaranteeing an angle deviation between an anchor head fixing tool and the ground, a target structure or the like in ground anchor work.

[0002]

2. Description of the Related Art For example, in ground anchor construction, a tension member such as a PC steel strand which has been tensioned by a tensioning device, etc.
The anchor is fixed to the ground, the target structure, and the like via an anchor plate (supporting plate) while maintaining tension at a predetermined load by a fixing tool including a combination of an anchor head and a fixing wedge.

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.

[0004] A pair of anchor pedestals formed separately at the upper and lower portions are formed to have non-uniform thicknesses each comprising a base surface and a slope with respect to the base surface. For example, both slopes are opposed and abutted. Are located. And the upper pedestal obtained by the difference of the combination position by rotation etc.,
By changing the angle between the base surfaces of the lower pedestal, it is possible to guarantee the angle deviation of the anchor head with respect to the anchor plate,
An anchor pedestal is configured.

[0005]

However, in the known construction, the upper pedestal and the lower pedestal, which are not uniform in thickness, are merely interposed between the anchor head, the ground, and the like. There is a possibility that the displacement of the anchor pedestal with respect to the line and the displacement of the upper pedestal and the lower pedestal in the radial direction of the slope may occur.

The anchor pedestal is usually formed of concrete or the like so as to resist the load for pulling the strand of PC steel. However, the anchor pedestal made of concrete or the like is heavy and places a heavy burden on the operator. In addition to the application, it is difficult to install the PC steel stranded wire at right angles due to misalignment at the time of work, which may damage the PC stranded wire, 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 a tendon such as a PC steel strand and improves workability.

[0008]

According to the present invention, a circular projecting end having a peripheral surface perpendicular to the slope of the upper pedestal is provided on the slope. A support pipe through which the tendon material can be inserted is integrally extended to the slope side in a direction perpendicular to the base surface with one end fixed to the peripheral surface of the through hole. In addition, an insertion hole with a playable opening at the projecting end of the upper pedestal on the slope is drilled in the lower pedestal in a shape that allows the support pipe to be freely inserted at any angle with the upper pedestal. I have.

The support pipe is disposed around the support pipe, and the anchor pedestal is arranged by inserting the support pipe into an anchor hole, such as the ground, with the support pipe, and is formed as a flat surface without irregularities. The angle between both base surfaces can be adjusted arbitrarily and steplessly according to the contact positions of the inclined surfaces of the upper pedestal and the lower pedestal.

[0010]

In this configuration, the anchor pedestal is separated from the tension member by the support pipe positioned with respect to the anchor hole such as the ground by the support pipe, and the protruding end of the upper pedestal with respect to the opening on the slope side of the lower pedestal. The loose fit prevents the upper pedestal and the lower pedestal from shifting in the radial direction of the slope, so that the safety of the tendon can be ensured. And since the slope of both the upper pedestal and the lower pedestal is formed as a flat surface without unevenness, the angle between the base surfaces can be arbitrarily and steplessly adjusted according to the contact position of both slopes.

[0011]

Embodiments of the present invention will be described below 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 14.
Are formed by a combination of

As can be clearly seen from FIG. 1, the upper pedestal 12 and the lower pedestal 14 of the anchor pedestal are not uniform in thickness, that is, the slopes 12b, 14 inclined with respect to the base surfaces 12a, 14a.
b, and are formed with different maximum and minimum thicknesses, respectively. Normally, tension members 16 such as PC steel strands
Fixing device 18 such as an anchor head fixed to a concrete pressure receiving plate 22 of a ground, a target structure or the like 20
The upper pedestal 12, the lower pedestal 14, that is, the anchor pedestal 10 is disposed by combining the slopes 12b and 14b so as to face each other.

An anchor is provided by, for example, a change in the angle of the base surface 14a of the lower pedestal with respect to the base surface 12a of the upper pedestal according to a change in the combination position (angle) of the upper pedestal 12 and the lower pedestal 14 due to rotation or the like. The anchor base 10 is configured so that the angle between the head (fixing device) 18 and the ground 20 can be adjusted.

In the present invention, the upper pedestal 12 is formed by cutting a round bar having a predetermined diameter, and the lower pedestal 14 is
It is formed into a predetermined shape as a casting. The base surfaces 12a and 14a and the slopes 12b and 14b of the upper pedestal and the lower pedestal are all formed as flat surfaces without irregularities.

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

Here, as shown in FIGS. 1 and 2, in the present invention, a circular protruding end 24 having a peripheral surface 24a extending perpendicular to the inclined surface 12b of the upper pedestal is formed on the inclined surface. In addition to projecting, a through hole 26 is formed in the upper pedestal 12 so as to penetrate the base surface and the slope in a direction perpendicular to the base surface 12a. Then, by the pivotal connection of one end to the peripheral surface of the through hole 26, the support pipe 28 is integrated with the upper pedestal 12, and the base surface 12a
At right angles to the slope side.

The support pipe 28 is a pipe member having an inner diameter capable of inserting at least the PC steel stranded wire (tensile member) 16, for example, a rust-proof stainless steel having a specific thickness corresponding to a required rigidity. It is formed from a pipe member made of stainless steel.

As shown in FIG. 1, through holes 26 in the upper pedestal are provided.
The support pipe 28 is formed integrally with the upper pedestal 12 by, for example, forming a continuous two-step hole having a large diameter on the slope side, and fitting and fixing the end to the large diameter portion 26a.

As shown in FIGS. 1 and 2, a through hole 30 through which the support pipe 28 can be freely inserted is formed in the lower pedestal 14 through the base surface 14a and the inclined surface 14b. The insertion hole 30 has an opening 30a on the slope 14b into which the protruding end 24 of the upper pedestal can be loosely fitted, and can ensure the insertion of the support pipe 28 at any combination angle with the upper pedestal 12. Are formed.

As shown in FIG. 1, the upper pedestal 12 and the lower pedestal 14 of such an anchor pedestal are assembled by inserting the insertion hole 30 with the support pipe 28, and the support pipe is inserted into the anchor hole 32 of the ground 20 or the like. Placed. Then, at the position adjacent to the upper pedestal 12, the anchor head (fixing device)
18 is fixed to the PC steel strand (tensile material) 16, and the PC steel strand is fixed while maintaining a specific load.

That is, according to the present invention, due to the loose fit of the protruding end 24 from the opening 30a accompanying the insertion of the support pipe 28 into the insertion hole 30, the upper pedestal 12,
The positional displacement between the lower pedestals 14 is reliably prevented.
Then, since the support pipe 28 is continuously inserted into the insertion hole 30 of the lower pedestal and the anchor hole 32 of the ground, the upper pedestal 12 and the lower pedestal 14 are both engaged with the support pipe and the anchor hole. And is held in. Therefore, even before a predetermined load is applied to the PC steel strand 16, it is possible to reliably prevent the anchor base 10 from dropping or shifting with respect to the anchor hole 32 in the ground or the like under a light force.

Accordingly, the weight burden on the operator 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 separated from the anchor pedestal 10 by the support pipe 28, even if the anchor pedestal is deviated from the PC steel stranded wire, the contact of the anchor pedestal with the PC steel stranded wire is prevented. Is prevented. Therefore, the anchor base 10 does not damage the PC steel strand 16 and the safety of the PC strand is sufficiently ensured.

In the present invention, the upper pedestal 12
Are formed by cutting a round bar. That is,
By adjusting the cutting angle of the round bar, the base 12
The angle between a and the slope 12b can be arbitrarily selected. Therefore, it is possible to arbitrarily adjust the angle of the upper pedestal 12 in accordance with the angle difference between the anchor head 18 and the concrete pressure receiving plate 22, and the upper pedestal and the base 12 of the lower pedestal can be adjusted.
The range of angles obtained between a and 14a is sufficiently extended.

Further, the slopes 12a, 14a of the upper pedestal and the lower pedestal
Are formed as flat surfaces without irregularities, and the peripheral surface 24a of the protruding end of the upper pedestal is perpendicular to the slope 12b, so that the upper pedestal 12 with respect to the lower pedestal 14 around the protruding end 24 is formed. Rotation can be performed easily without any step. Therefore,
After the anchor pedestal 10 is arranged, the angle can be adjusted according to the angle deviation between the anchor head 18 and the concrete pressure receiving plate 22, and the optimum angle can be reliably set under a simple operation.

Since the angle of the anchor pedestal 10 can be set under the rotation of the upper pedestal 12 with respect to the lower pedestal 14, the angle adjustment operation is reliably simplified.

As shown in FIGS. 1 and 2, the upper pedestal
It is preferable that a concave portion 34 into which a predetermined tool can be fitted is provided on the peripheral surface of the twelve. By providing the concave portion 34, the rotation of the upper pedestal 12 using a tool, that is, the angle adjustment work of the anchor pedestal 10 can be performed, so that the burden on the operator can be reliably reduced, and the workability is further improved.

Here, as shown in FIGS. 1 and 2, in the present invention, a support pipe 36 is provided around the support pipe 28.
Is disposed, and the support pipe is inserted into the anchor hole 32 together with the support pipe. As the support pipe 36, for example, a gas pipe having an inner diameter corresponding to the support pipe 28 and an outer diameter that can be loosely inserted into the anchor hole 32 can be used, and the support pipe is fixed to the support pipe 28.

In such a configuration, the support pipe (gas pipe) 36 is
, The contact of the support pipe with the PC steel strand 16 is reliably prevented. Therefore, from this point as well, damage to the PC steel strand 16 can be prevented, and the safety of the PC strand is sufficiently ensured.

The support pipe 36 is a support pipe.
In addition to functioning as a reinforcing member of 28, under a shift with respect to the anchor hole 32 such as the ground, the support pipe contacts the peripheral surface of the anchor hole 32 such as the ground to isolate the support pipe from the anchor hole peripheral surface, Damage and breakage of the support pipe can be reliably prevented. Therefore, also from this point, the safety of the PC steel strand 16 can be ensured.

Further, when a load is applied to the PC steel strand 16, a component Fa is generated in the support pipe 28 as shown in FIG. That is, the anchor pedestal via the anchor head 18
By acting on the supporting member 28 and the support pipe 36, the load Fb from the PC stranded wire is dispersed by acting on the component steel Fa of the load from the PC steel stranded wire 16 acting on 10.
The concentration of the load Fb on the pedestal anchor can be prevented.

Therefore, the hardness of the upper pedestal 12 and the lower pedestal 14 of the pedestal anchor can be reduced. That is, in the present invention, the present invention is not limited to known concrete and the like. For example, as described above, the upper pedestal 12,
Since the lower pedestal 14 can be processed and formed, respectively, the weight of the anchor pedestal itself can be reduced, and the work load can be reduced, thereby further improving the workability.

In the embodiment, a stainless steel pipe member is exemplified as the support pipe 28. However, a pipe member having an inner diameter through which the PC stranded wire 16 can be inserted, as long as the pipe member is not rustproofed. Because it is sufficient, the support pipe is not limited to stainless steel, but may be formed from another hard pipe. However, if a pipe member made of a rust-resistant material such as stainless steel is used as the support pipe 28,
This is preferable in terms of safety because deterioration due to rust or the like can be reliably prevented, and the weight can be suppressed despite sufficient rigidity.

Although a gas pipe is illustrated as the support pipe 36, it can be arranged around the support pipe 28, and
A support pipe may be formed from another pipe material, as long as the support pipe can be loosely inserted into the anchor hole 32. However, since the gas pipe is preliminarily subjected to a rust prevention treatment or the like, it can be used by cutting a gas pipe having a corresponding diameter at a predetermined length. That is, since the processing is not complicated, if a gas pipe is used as the support pipe 36, the workability is further improved.

Further, in the embodiment, the support pipe is fixed by fixing one end of the upper pedestal 12 to the large diameter portion 26a of the through hole.
28 is provided integrally with the upper pedestal.
Since it is sufficient to extend the support pipe in a direction perpendicular to 12a, it is not limited to fixing to the large diameter portion, for example, the through hole 26 is formed in a straight shape, the base surface and the end surface are flush, The support pipe may be fixed to the upper pedestal 12.

However, as in the embodiment, the through holes 26
Is formed as a two-step hole, and if one end of the support pipe 28 is fitted and fixed to the large diameter portion 26a, even if a slight gap is formed between the support pipe 28 and the through hole, the gap is not exposed to the outside. Invasion of water or the like can be reliably prevented.

As shown in FIG. 1, in the embodiment, the protruding end 24 of the upper pedestal is formed substantially parallel to the inclined surface 12b. However, it is sufficient if the peripheral surface 24a is at right angles to the slope 12b, and the presence or absence of an angle between the end of the protruding end 24 and the slope is not particularly limited.

The tension member 16 is exemplified by a PC steel stranded wire, but is not limited thereto. For example, it can be said that the present invention can be applied to a configuration using a PC steel rod or the like as the tension member. Not even.

The embodiments described above are for explaining the present invention, and do 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.

[0041]

As described above, according to the anchor pedestal according to the present invention, the loose fit of the projecting end into the insertion hole of the lower pedestal allows the upper pedestal and the lower pedestal to be radiated along the slope. Is prevented, and the anchor pedestal can be held against the ground or the like by inserting the support pipe into the anchor hole of the ground or the like. Therefore, the isolation of the tendon by the support pipe ensures sufficient safety of the tendon, and the workability is improved by reducing the weight burden.

Since the upper pedestal is formed by cutting the round bar, by adjusting the cutting angle of the round bar,
The angle between the base surface and the slope of the upper pedestal can be arbitrarily selected. Therefore, it is possible to arbitrarily adjust the angle of the upper pedestal, and the range of angles obtained between the bases of the upper pedestal and the lower pedestal is sufficiently expanded.

Further, the slopes of the upper pedestal and the lower pedestal are both formed as flat surfaces without irregularities, and the peripheral surface of the protruding end of the upper pedestal is perpendicular to the slope, so that the periphery of the protruding end is formed. The rotation of the upper pedestal with respect to the lower pedestal can be easily performed steplessly. Therefore, after the anchor pedestal is arranged, the angle can be adjusted according to the angle deviation between the anchor head fixing tool and the ground or the like, and the optimum angle setting can be reliably performed under a simple operation.

Further, since the support pipe disposed around the support pipe determines the position of the support pipe with respect to the anchor hole and functions as a reinforcing member for the support pipe, it is possible to prevent the tendon and the support pipe from being damaged. From this point, the safety of the tendon is sufficiently ensured.

By providing a concave portion on the peripheral surface of the upper pedestal into which a predetermined tool can be inserted, rotation of the upper pedestal using a tool, that is, angle adjustment of the anchor pedestal can be performed. The burden can be reliably reduced, and the workability is further improved.

Furthermore, if a gas pipe is used as the support pipe, it is sufficient to cut a gas pipe having a corresponding diameter at a predetermined length, so that the working is not complicated and the workability is further improved.

Further, if the through hole of the upper pedestal is formed as a two-step hole, and one end of the support pipe is fitted and fixed to the large diameter portion, even if a slight gap is formed between the through hole and the outside, the gap is external. Since it is not exposed to water, intrusion of water or the like through a gap can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of an anchor base according to the present invention.

FIG. 2 is a schematic exploded perspective view of an anchor base.

[Explanation of symbols]

 10 Anchor pedestal 12 Upper pedestal 12a Base surface 12b Slope 14 Lower pedestal 14a Base surface 14b Slope 16 Tensile material (PC steel strand) 18 Head anchoring device (Anchor head) 20 Ground, target structure, etc. 24 Projection end of upper pedestal 24a Peripheral surface of protruding end 26 Upper pedestal through-hole 26a Large diameter portion of through-hole 28 Support pipe 30 Lower pedestal insertion hole 30a Insertion hole opening 32 Anchor hole 34 Depression 36 Support pipe (gas pipe)

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toshinori Yamada 2-1-26 Shimozen, Toda City, Saitama Prefecture (56) References Japanese Utility Model 6-4140 (JP, U) Japanese Utility Model 7-15829 (JP, U.S.A.) U) Hikaru 6-85431 (JP, U) Hiko 3-36587 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) E02D 5/74-5/80

Claims (3)

(57) [Claims] An unfixed pair of an upper pedestal and a lower pedestal having a base surface and a slope with respect to the base surface are disposed between the ground, a target structure, etc. and the anchor head fixing device by combining the two. In the anchor pedestal that compensates for the deviation of the angle of the anchor head fixing device with respect to the surface of the ground, etc., due to the angle between the base surfaces caused by the opposition and contact between the slopes, A circular protruding end having a circumferential surface is provided on the slope, and one end is fixed to a peripheral surface of a through hole penetrating the base surface and the protruding end of the slope in a direction perpendicular to the base surface. A support pipe through which a tendon can be inserted is integrally extended to the slope side, and an insertion hole with a playable opening at the projecting end of the upper pedestal on the slope is combined with the upper pedestal at any angle. Also in the shape that the support pipe can be loosely inserted, The support pipe is arranged around the support pipe, and the support pipe is placed by inserting the support pipe into the anchor hole of the ground etc. with the support pipe, and it is formed as a flat surface without unevenness An anchor pedestal characterized in that the angle between both base surfaces can be adjusted arbitrarily and steplessly according to the contact positions of the slopes of the upper pedestal and the lower pedestal. 2. An unfixed pair of upper pedestal and lower pedestal having a base surface and an inclined surface with respect to the base surface, which are arranged between the ground, a target structure, etc. and the anchor head fixing device by combining them. In the anchor pedestal which compensates for the deviation of the angle of the anchor head fixing tool with respect to the ground or the like surface due to the angle between the base surfaces caused by the contact between the slopes, the upper pedestal is formed by cutting a rod material having a predetermined diameter. A circular protruding end having a peripheral surface extending at right angles to the slope of the upper pedestal is projected from the slope, and penetrates the base and slope protruding ends in a direction perpendicular to the base. A support pipe through which a tendon material can be inserted is integrally extended to the slope side with one end fixed to the peripheral surface of the through hole, and the slope has a playable opening at the protruding end of the upper pedestal. Hole at any angle with the upper pedestal The support pipe is drilled in the lower pedestal as a casting so that the support pipe can be loosely inserted, and the support pipe is arranged around the support pipe, and the support pipe is attached to the anchor hole such as the ground with the support pipe. The angle between the bases can be adjusted arbitrarily and steplessly in accordance with the contact position of the upper pedestal and the lower pedestal, which are arranged as a flat surface without any irregularities. Characterized anchor pedestal. 3. The through hole of the upper pedestal is formed as a continuous two-step hole having a large diameter on the slope side, and the support pipe is extended to the slope side by fitting and fixing the end to the large diameter portion. An anchor pedestal according to claim 1 or 2.