JP5703081B2 - Fixing structure and fixing structure - Google Patents

Description

  The present invention relates to a fixing structure for fixing an end of a tendon material to a structure and a fixing structure.

Conventionally, as this type of fixing structure, for example, as shown in Patent Document 1 below, a casting block embedded in a structure, and a bonding block having an internal cone supported by the casting block and fixing a tendon, An arrangement including an anchor head for fixing a tendon is known.
In this fixing structure, first, the initial tension of the tendon is performed by fixing the end of the tendon to the anchor head. After the tension material is initially tensioned in this manner, the bonding material is filled into the bonding block, and an internal cone formed by integrating the filling material and the tension material is formed in the bonding block.

JP 2003-286759 A

  However, in the conventional fixing structure, since the initial tension of the tendon is performed by fixing the end of the tendon to the anchor head, the initial tension of the tendon concentrates on the anchor head. It is necessary to ensure the strength of the head. Therefore, it is necessary to increase the thickness of the anchor head, requiring a large amount of steel for the anchor head, resulting in a problem that the manufacturing cost increases.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a fixing structure capable of reducing the cost.

In order to solve the above problems, the present invention proposes the following means.
According to the first aspect of the present invention, in the tension member inserted through the through hole formed in the structure, the end of the tension member protruding from the through hole to one side in the axial direction is fixed to the structure. A fixing structure that is arranged between the tube portion in which the end of the tendon is inserted and the tube portion and the structure along the axial direction, and penetrates in the axial direction. A bottom plate portion in which the tendon is inserted into the insertion hole, closes the tube portion from the other side in the axial direction and is in close contact with the structure from the one side, and a mortar material, a resin material, or a mortar material and a resin material consists mixed material of the filling material is fixed to the tendon ends together closely from the one side to the bottom plate portion is filled in the pipe section, with closely from the one side to the filling material Non-contact from the one side to the pipe There, characterized in that the edge of the tendon end is provided with a fixed plate fixed.

In this invention, after the tension force of the tendon is transmitted to the filler as a support pressure from the end of the tendon end via the fixing plate, or directly transmitted from the end of the tendon to the filler, It is transmitted as a supporting pressure from the filler to the bottom plate, and then received by the structure.
Further, since the filler is made of a mortar material, a resin material, or a mixed material of a mortar material and a resin material, when the tension is transmitted to the filler as described above, the filler is placed outside the pipe portion in the radial direction. Deforms to swell. At this time, the tube portion restrains the deformation of the filler, so that the force transmitted to the filler is also transmitted to the tube portion and received.
As described above, the tension of the tendon is distributed and transmitted from the end of the tendon to the bottom plate and the pipe through the filler, and is received by the structure and the pipe, respectively. Is fixed to the structure.

When the fixing plate is not in contact with the pipe portion from the one side, the force transmitted as the supporting pressure through the fixing plate out of the tension force of the tendon material is not transmitted to the pipe portion. It can be transmitted to the filler. Thereby, it becomes difficult to transmit the tension force as a force along the axial direction to the pipe portion.
Further, even when the fixing plate is in contact with the pipe portion from the one side, when the tension force is applied to the fixing plate from the edge of the end of the tension member, the fixing plate is deformed to the other side. The portion of the fixed plate that is located on the inner side in the radial direction with respect to the contact portion with the pipe portion transmits the support pressure to the filler. The force transmitted as can be transmitted to the filler more preferentially than the tube portion.

  The invention according to claim 2 of the present application is characterized in that the pipe portion is formed in a tapered shape having a diameter gradually reduced from the one side toward the other side.

  In this invention, since the pipe part is formed in a tapered shape having a diameter gradually reduced from the one side to the other side, the tension force applied to the tendon is received by the structure and the pipe part, respectively. When this is done, the force directed toward the inside in the radial direction of the tube portion is easily transmitted to the filler, and the filler is firmly fixed to the end of the tendon.

  The invention according to claim 3 of the present application is characterized in that a sliding material layer is provided on the inner peripheral surface of the pipe portion.

  In this invention, since the slip material layer is provided on the inner peripheral surface of the pipe portion, the filler is firmly fixed to the end of the tendon when the tension of the tendon is transmitted to the filler. Then, it tries to move to the other side while sliding on the inner peripheral surface of the pipe part. Here, as described above, the pipe portion is formed in a tapered shape having a diameter gradually reduced from the one side toward the other side, so that the filler slides on the inner peripheral surface of the pipe portion while By trying to move to the other side, the force toward the inside in the radial direction of the tube portion is more easily transmitted to the filler, and the filler is more firmly fixed to the end of the tendon.

  The invention according to claim 4 of the present application includes a structure in which a through-hole is formed and a tension member inserted through the through-hole, and one side of the tension member in the axial direction from the through-hole. The end of the tendon material protruding to the surface is fixed to the structure by the fixing structure.

According to the invention described in claim 1 of the present application, since the tension force of the tendon is distributed and transmitted to the bottom plate portion and the pipe portion, they are thickened to ensure the strength of the bottom plate portion and the pipe portion. Therefore, it is possible to suppress excessively, and it is possible to reduce the cost by suppressing the amount of steel used.
Moreover, since tension force is disperse | distributed via a filler, the structure which disperse | tensile_strength can be formed by performing the simple operation | work of filling a filler in a pipe part. As a result, complicated processing can be suppressed during manufacturing of the fixing structure, and manufacturing cost can be suppressed.
Furthermore, when it is difficult to transmit the tension force to the pipe portion as a force along the axial direction, it is possible to suppress the use of a large amount of steel material in the pipe portion in order to increase the strength in the axial direction of the pipe portion. Therefore, the amount of steel used can be further suppressed and further cost reduction can be achieved.

According to the second aspect of the present invention, since the filler is firmly fixed to the end of the tendon, the end of the tendon can be stably fixed to the structure.
According to the invention described in claim 3 of the present application, since the filler is firmly fixed to the end of the tendon, the end of the tendon can be reliably and stably fixed to the structure.

  According to the invention described in claim 4 of the present application, since the end portion of the tendon is fixed to the structure by the fixing structure, the cost can be reduced.

FIG. 3 is a longitudinal sectional view showing a main part of a fixing structure according to an embodiment of the present invention. FIG. 2 is a plan view of the fixing structure constituting the fixing structure shown in FIG. 1 as viewed from one side in the axial direction. FIG. 2 is a plan view of the fixing structure constituting the fixing structure shown in FIG. 1 as viewed from the other side in the axial direction. FIG. 8 is a longitudinal sectional view showing a main part of a modification of the fixing structure shown in FIG. 1.

Hereinafter, a fixing structure according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the fixing structure 1 includes a structure 2 in which a through hole 2a is formed, and a plurality of tension members 3 inserted through the through hole 2a. The tendon end 3 a protruding from the through hole 2 a to the one side in the axis O direction in the tendon 3 is fixed to the structure 2 by the fixing structure 10.

  The fixing structure 10 is disposed between the tube portion 11 in which the tendon end portion 3a is inserted, and the tube portion 11 and the structure 2 along the axis O direction, and is penetrated in the axis O direction. The bottom plate part 12 in which the tendon material 3 is inserted into the insertion hole 12a and the non-shrink mortar (mortar material) are filled in the tube part 11 and are in close contact with the bottom plate part 12 from the one side and the end part of the tendon A filler 13 fixed to 3a, and a fixing plate 14 which is in close contact with the filler 13 from the one side and to which the edge 3b of the tendon end 3a is fixed.

  Here, in this embodiment, as shown in FIGS. 1 to 3, the tube portion 11 of the fixing structure 10 is formed in a circular tube shape, and the bottom plate portion 12 and the fixing plate 14 are formed in a disk shape. As shown, the through holes 2a of the structure 2 and the central axes of the tube portion 11, the bottom plate portion 12 and the fixing plate 14 of the fixing structure 10 are located on a common axis. Hereinafter, this common axis is referred to as an axis O, and a direction orthogonal to the axis O is referred to as a radial direction.

  The tendon 3 is a single wire made of a single wire, and extends along the direction of the axis O. As shown in FIGS. 2 and 3, the plurality of tendons 3 are arranged such that the distances between the central axes are equal in a plan view viewed from the direction of the axis O. In this embodiment, one of the plurality of tendons 3 is arranged coaxially with the axis O, and the other tendon 3 is arranged so as to double surround the one tendon 3 from the outside in the radial direction. ing.

  As shown in FIG. 1, the bottom plate portion 12 closes the tube portion 11 from the other side and is in close contact with the structure 2 from the one side. The outer diameter of the bottom plate portion 12 is larger than the inner diameter of the through hole 2 a, and the outer peripheral edge portion of the bottom plate portion 12 is in close contact with the opening peripheral edge portion of the through hole 2 a in the structure 2 from the one side.

The pipe part 11 is formed in a tapered shape having a diameter gradually reduced from the one side toward the other side. The outer diameter of the opening end portion 11a on the other side of the tube portion 11 is smaller than the outer diameter of the bottom plate portion 12, and the opening end portion 11a contacts the bottom plate portion 12 from the one side and is joined by welding. .
A sliding material layer 16 is provided on the inner peripheral surface of the pipe portion 11. The sliding material layer 16 is provided over the entire inner peripheral surface of the pipe portion 11, and is formed, for example, by coating the inner peripheral surface of the pipe portion 11 or applying an unbond material made of a rubber material. can do.

  The filler 13 spreads over the entire inside of the pipe portion 11 and is filled with no gap, and is formed in a truncated cone shape. The end face facing the one side in the filler 13 is the end face facing the one side in the pipe portion 11. It has become the same. The filler 13 is formed by curing after the non-shrink mortar having fluidity is filled in the tube portion 11.

  The fixing plate 14 is provided with a fixing hole 14a extending in the direction of the axis O, and an end 3b of the tendon end 3a protrudes from the fixing hole 14a. A male screw portion (not shown) is formed on the outer periphery of the end edge 3b, and the end edge 3b is fixed to the fixing plate 14 via a fixing member 15 made of a nut and screwed to the male screw portion. In the present embodiment, the fixing member 15 is in contact with the end face facing the one side of the fixing plate 14, whereby the end edge 3 b of the tension material 3 is fixed to the fixing plate 14.

In the present embodiment, the outer diameter of the fixing plate 14 is made smaller than the inner diameter of the opening end portion 11b on the one side of the tube portion 11, as shown in FIGS. 11 is non-contact from the one side.
In the fixing structure 1 configured as described above, the initial tension of the tension member 3 is performed after the fixing structure 10 is formed.

Next, the operation of the fixing structure 10 will be described.
In the fixing structure 10 as shown in FIG. 1, the tension force of the tension material 3 is transmitted from the end 3 b of the tension material end 3 a to the filler 13 as a support pressure via the fixing member 15 and the fixing plate 14. After being transmitted directly from the tendon end 3 a to the filler 13, it is transmitted as a supporting pressure from the filler 13 to the bottom plate 12, and then received by the structure 2.

  Further, since the filler 13 is made of non-shrink mortar, when the tension is transmitted to the filler 13 as described above, the filler 13 is deformed so as to bulge outward in the radial direction. At this time, the pipe part 11 restrains the deformation of the filler 13, so that the force transmitted to the filler 13 is also transmitted to the pipe part 11 and received.

  As described above, the tension force of the tension material 3 is distributed and transmitted from the tension material end portion 3a to the bottom plate portion 12 and the tube portion 11 via the filler 13, and is received by the structure 2 and the tube portion 11, respectively. As a result, the tendon end portion 3 a is fixed to the structure 2.

  As described above, according to the fixing structure 10 according to the present embodiment, the tension force of the tension member 3 is distributed and transmitted to the bottom plate portion 12 and the tube portion 11. In order to ensure strength, it is possible to prevent these from becoming too thick, and it is possible to reduce the cost by reducing the amount of steel used.

  In addition, since the fixing plate 14 is not in contact with the tube portion 11 from the one side, the force transmitted as the supporting pressure through the fixing plate 14 among the tension force of the tension member 3 is transmitted to the tube portion 11. Instead of this, it can be transmitted to the filler 13. Thereby, it is possible to make it difficult to transmit the tension force to the pipe part 11 as a force along the axis O direction. Therefore, a large amount of steel is used for the pipe part 11 in order to increase the strength of the pipe part 11 in the axis O direction. It is possible to further reduce the cost by further reducing the amount of steel used.

  Further, since the tension force is dispersed through the filler 13, a structure for dispersing the tension can be formed by performing a simple operation of filling the tube portion 11 with the filler 13. As a result, complicated processing can be suppressed during manufacturing of the fixing structure 10, and manufacturing costs can be reduced.

  Moreover, since the pipe part 11 is formed in the taper shape which was diameter-reduced gradually as it goes to the said other side from the said one side, the tension force added to the tension material 3 is applied to the structure 2 and the pipe part 11. When each is received, a force directed radially inward is easily transmitted to the filler 13, and the filler 13 is firmly fixed to the tendon end portion 3 a of the tendon 3. As a result, the tendon end 3a can be stably fixed to the structure 2.

  Further, since the sliding material layer 16 is provided on the inner peripheral surface of the tube portion 11, when the tension of the tension material 3 is transmitted to the filler 13, the filler 13 is firmly attached to the tension material end 3a. While trying to move to the other side while sliding on the inner peripheral surface of the tube portion 11, the tube portion 11 is fixed. Here, as described above, since the pipe portion 11 is formed in a tapered shape having a diameter gradually reduced from the one side toward the other side, the filler 13 is formed on the inner peripheral surface of the pipe portion 11. By trying to move to the other side while sliding, the force toward the radially inner side of the tube portion 11 is more easily transmitted to the filler 13, and the filler 13 is more firmly attached to the tendon end 3a. It will be fixed. As a result, the tendon end 3a can be reliably and stably fixed to the structure 2.

  According to the fixing structure 1 according to the present embodiment, since the tendon end portion 3a is fixed to the structure 2 by the fixing structure 10, the cost can be reduced.

The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the sliding material layer 16 is provided on the inner peripheral surface of the pipe portion 11, but the sliding material layer 16 may not be provided.

  Moreover, in the said embodiment, although the fixed plate 14 shall be the non-contact from the said one side to the pipe part 11, you may contact. Even in this case, when a tension force is applied to the fixing plate 14 from the edge 3b of the tension material end 3a, the fixing plate 14 is deformed to the other side, and the fixing plate 14 contacts the tube portion 11. The portion located on the inner side in the radial direction than the portion transmits the supporting pressure to the filler 13, so that the force transmitted as the supporting pressure through the fixing plate 14 among the tensioning force of the tension material 3, It can be preferentially transmitted to the filler 13 rather than the tube portion 11.

  Further, the pipe portion 11 is formed in a tapered shape with a diameter gradually reduced from the one side toward the other side, but is not limited to this, and in the fixing structure 20 shown in FIG. Like the pipe part 11, the diameter may be the same over the entire length in the direction of the axis O without reducing the diameter.

  Moreover, in the said embodiment, although the filler 13 shall consist of non-shrink mortar, it is not restricted to this, The filler 13 is comprised with the mortar material, the resin material, or the mixed material of the mortar material and the resin material. If it is done, it is not limited to this. In addition, the material which comprises the filler 13 has a small shrinkage amount at the time of hardening similarly to a non-shrink mortar, For example, you may contain the additive containing a swelling agent etc.

In the above embodiment, a plurality of tendons 3 are provided. However, the present invention is not limited to this, and there may be one.
Furthermore, in the said embodiment, although the tension | tensile_strength material 3 shall be a single wire, it is not restricted to this, For example, the strand wire etc. which twist together a some wire material may be sufficient.

Moreover, in the said embodiment, although the pipe part 11 of the fixing structure 10 shall be formed in a circular tube shape, it is not restricted to this, For example, a square tube etc. may be sufficient. In addition, the bottom plate portion 12 and the fixed plate 14 are formed in a disk shape, but are not limited thereto, and may be, for example, a rectangular plate shape.
Furthermore, in the said embodiment, although the through-hole 2a of the structure 2 and each center axis line of the pipe part 11, the baseplate part 12, and the fixing plate 14 of the fixing structure 10 were located on the common axis, Not limited.

  In the embodiment, the fixing member 15 is a nut. However, the fixing member 15 is not limited to this, and the fixing member 15 may be a wedge, for example. Further, as long as the edge 3b of the tendon end 3a is fixed to the fixing plate 14, the fixing member 15 may not be provided. For example, the male thread portion of the tendon end 3a is formed on the inner peripheral surface of the fixing hole 14a. An internal thread portion that is screwed onto the housing may be formed.

  Moreover, in the said embodiment, although the pipe part 11 and the baseplate part 12 shall be joined by welding, it is not restricted to this, For example, the pipe part 11 and the baseplate part 12 are integrally molded by casting. There may be.

  Moreover, in the said embodiment, although the filler 13 spread | extended in the whole inside of the pipe part 11, and shall be filled without the gap, it will be restricted to this if it is closely contacted from the said one side to the baseplate part 12. Instead, for example, only the other side portion located on the other side of the internal space of the tube portion 11 may be filled.

  In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Fixing structure 2 Structure 2a Through-hole 3 Tension material 3a Tension material edge part 3b Edge 10, 20 Fixing structure 11 Pipe part 12 Bottom plate part 12a Insertion hole 13 Filler 14 Fixing board 16 Sliding material layer O Axis line

Claims (4)

In the tension member inserted into the through hole formed in the structure, the fixing structure that fixes the end of the tension member protruding to the one side in the axial direction from the through hole to the structure,
A tube part in which the end of the tendon is inserted;
The tension material is inserted into an insertion hole that is disposed between the tube portion and the structure along the axial direction and penetrates in the axial direction, and the tube portion is connected to the other side in the axial direction. A bottom plate portion that is closed from the one side and in close contact with the structure
A mortar material, a resin material or a mixed material of a mortar material and a resin material, a filler filled in the pipe portion and intimately contacted from the one side to the bottom plate portion and fixed to the end of the tendon material,
A fixing plate that is in close contact with the filler from the one side and is not in contact with the pipe portion from the one side and to which an end edge of the tendon end is fixed. Construction. The fixing structure according to claim 1,
The fixing structure according to claim 1, wherein the pipe portion is formed in a tapered shape having a diameter gradually reduced from the one side toward the other side. The fixing structure according to claim 2,
A fixing structure, wherein a slipping material layer is provided on an inner peripheral surface of the pipe portion. A structure in which a through hole is formed;
A tension material inserted through the through hole, and
The end of the tendon that protrudes from the through hole to one side in the axial direction in the tendon is fixed to the structure by the fixing structure according to any one of claims 1 to 3. Fixing structure.

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