JPH084207A - Joint structure of tension material and fixing tool and joint method thereof - Google Patents

Abstract

PURPOSE:To enable a fixing tool to be small sized so as to reduce the weight of the fixing tool and the like, improve the workability in transportation, execution, and the like, and easily improve the reliability of joint of a tension material and a fixing tool without carrying out a troublesome work. CONSTITUTION:An expanding material filled space 10 is cylindrically formed in a sleeve 9, and the expanding material filled space 10 is provided with a bundle-like tension material 3 composed of a plurality of linear members 3a so as to insert the fixing part 3b of the tension material 3 into the space. The fixing part 3b of the tension material 3 is formed so that the linear members 3a are adhesively integrated through a resin adhesive JS, and expanding material BZ is provided in the expanding material filled space 10 so as to fill between the sleeve 9 and the fixing part 3b of the tension material 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension member used for a prestressed concrete structural material, and a joining member for fixing the tension member and the fixing member applied to the fixing member for fixing the tension member to the concrete member. Also, the present invention relates to a method for joining a tendon and a fixing tool.

[0002]

2. Description of the Related Art Conventionally, as one of the joining structures between a tension member used for a prestressed concrete structural member and a fixing member for fixing the tension member to the concrete member, the tension member and the fixing member have a predetermined shape. A structure having a structure in which an expansion material (or high-strength mortar or the like) is bonded is used. Further, when the tension member is formed of a bundle of a plurality of linear members (for example, aramid fiber material or PC steel wire), reliability in joining between the tension member and the fixing tool is improved. In order to maintain, each linear member had to be fixed to the fixing device. Therefore, conventionally, a plurality of linear members of the tension member are arranged in a joint portion between the tension member and the fixing device in such a manner that a gap space is formed between these linear members (that is, a plurality of linear members are arranged). The linear member of (1) is unraveled), and the expansive material (or high-strength mortar, etc.) supplied between the tension material and the fixing device can permeate into the space between the linear members. It was That is, the expansive material (or high-strength mortar, etc.) that permeates into the space between the linear members surely adheres to the respective linear members, so that each linear member has its expansive material (or high-strength mortar, etc.). ), So that it is securely fixed to the fixing tool.

[0003]

However, at the joining portion between the tension member and the fixing device, the gap space formed between the linear members is made small (or eliminated), and the fixing device is made compact. Is desired. That is, it is desired to reduce the size of the fixing tool and thus reduce the weight of the fixing tool and the like to improve workability in transportation and construction. Further, it is desired that the reliability of the joining of the tension member and the fixing device can be easily improved without complicated work. Therefore, in view of the above circumstances, the present invention enables downsizing of the fixing tool, thereby reducing the weight of the fixing tool and the like, and improving workability in transportation and construction, and moreover, joining the tension member and the fixing tool. Reliability of
(EN) A joining structure of a tension member and a fixing tool, which can be easily improved without complicated work, and a joining method of the tension member and the fixing tool.

[0004]

That is, the first invention of the present invention has a fixing tool body (9), and a fixing material filling space (10) is formed in a cylindrical shape in the fixing tool body (9). Then, a bundle-like tension member (3) composed of a plurality of linear members (3a) is provided in the fixing material filling space (10) in such a manner that the fixing portion (3b) of the tension member (3) is inserted. The fixing portion (3b) of the tension material (3) is formed integrally with each other via an adhesive (JS), and the fixing material main body (9) is provided in the fixing material filling space (10). And the fixing part (3) of the tension material (3)
The fixing material (BZ) is provided so as to fill the space between b). A second aspect of the present invention is a fixing tool (7) having a fixing tool body (9) having a fixing material filling space (10) formed in a tubular shape, and a plurality of linear members in a bundle. (3a)
When joining the tension member (3) made of the adhesive material (3) to each other, an adhesive (JS) is applied to the fixing portion (3b) of the tension member (3) to fix the fixing portion (3b) of the tension member (3). A shape to be inserted into a fixing material filling space (10) of the fixing tool body (9) so as to fill the space between the fixing tool body (9) and the tension material (3) in the fixing material filling space (10). The fixing material (BZ) is injected in. A third aspect of the present invention is the method for joining a tension member and a fixing tool according to the second aspect, wherein the fixing material (B
Z) is injected before the adhesive (JS) applied to the tendon (3) is solidified. The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

According to the first aspect of the present invention having the above-described structure, the tension member (3) integrally formed with the plurality of linear members (3a) and the fixing member (BZ) are fixed to each other. As a result, the individual linear members (3a) constituting the tension member (3)
Are fixed directly or indirectly to the fixing material (BZ). Further, in the second aspect of the present invention, after the adhesive (JS) applied to the tension material (3) is solidified, the plurality of linear members (3a) constituting the tension material (3) are fixed to each other. Then, the tension members (3) and the fixing material (BZ) are fixed to each other so that all the individual linear members (3a) constituting the tension member (3) are all fixed. BZ) is directly or indirectly fixed. Further, in the third aspect of the present invention, the unconsolidated adhesive (JS) acts so as to be effectively compatible with the fixing material (BZ).

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an example of a joining structure of a tension member and a fixing tool according to the present invention, and FIG. 2 is an X1-Y1 line of FIG.
It is a line end view.

The precast concrete structural member 1 is
As shown in FIG. 1, it has a concrete member 2,
In the concrete member 2, a sheath 5 having a straight hole is shown in FIG.
It is provided so as to pass through in the left-right direction of the middle paper surface, that is, in the directions of arrows A and B in FIG. Therefore, the end portion of the sheath 5 on the arrow B side is open to the surface 2a side of the concrete member 2 (the end portion of the sheath 5 on the arrow A side is the same on the surface side (not shown) opposite to the surface 2a. Is open), and a washer 6 is provided in the opening so as to surround the opening. Also,
As shown in FIGS. 1 and 2, a fixing tool 7 is provided on the surface 2a side of the concrete member 2, and the fixing tool 7 is a sleeve formed in a tubular shape extending in the directions of arrows A and B in the figure. Have nine. A hollow expansive material filling space 10 is formed inside the sleeve 9, and the expansive material filling space 10 is formed.
Both ends on the arrow A and B sides in the figure are sealed by predetermined closing plug members 11, 11. Also, the sleeve 9
1, an expansion material injection port 13 and an expansion air opening 12 are provided so as to penetrate the inside and outside of the expansion material filling space 10.

On the other hand, the precast concrete structural member 1 is formed by bundling a plurality of linear members 3a made of high-performance fibers (for example, aramid fibers, carbon fibers or the like, or PC steel wires instead of high-performance fibers). It has a tension member 3 configured, and the tension member 3 is installed so as to penetrate through the sheath 2a. Further, in the fixing tool 7, the tension member 3 penetrates the obstruction plug members 11 and 11, and the expansion material filling space 10 is provided. Is installed so as to pass through (the tension members 3 and the respective closure plug members 1
Between 1 is almost watertight). Therefore, the tip (not shown) of the tension member 3 on the arrow B side extends slightly in the direction of the arrow B from the fixing tool 7 (for convenience, the tension member 3 is shown in FIG. 1).
Only the sides are shown. ). In addition, a portion of the tension member 3 that is inserted into the fixing tool 7, that is, a portion indicated by a range L1 in FIG. 1 is a fixing portion 3b. In the fixing portion 3b of the tension member 3, a plurality of linear members 3a forming the tension member 3 are adhered to each other by a predetermined resin adhesive JS (eg, epoxy resin, phenol resin, etc.). Therefore, these linear members 3 in the fixing unit 3b
a is fixed to each other and integrated (note that the plurality of linear members 3a may be integrated via the resin adhesive JS at least in the fixing unit 3b.
It may or may not be performed in a region other than b. )

Further, a predetermined expansive material BZ (or high strength mortar or the like) is filled and solidified in the expansive material filling space 10, and the sleeve 9 and the tension material 3 are fixed through the expansive material BZ. The space between the parts 3b is fixed. The sleeve 9 and the tension member 3 are joined by fixing. By the way, in the fixing portion 3b of the tension member 3 which is a bundle of the plurality of linear members 3a, as described above, the plurality of linear members 3a are fixed in an integrated form via the resin adhesive JS. Therefore, the tension member 3 can be regarded as an integral member in the fixing portion 3b. That is, since the tension member 3 and the fixing member 7 which are regarded as an integral member are fixed via the expansion member BZ, the respective linear members 3a are fixed to the fixing member 7, respectively. Therefore, the reliability of the joining between the tension member 3 which is a bundle of the plurality of linear members 3a and the fixing tool 7 is improved. Further, since the bundle of the plurality of linear members 3a only needs to be integrated via the resin adhesive JS, the bundle of the linear members 3a can be made as dense as possible. That is, in the fixing portion 3b of the tension member 3, the space between the plurality of linear members 3a is as small as possible (or
Therefore, since the tension member 3 can be formed as thin as possible in the fixing portion 3b, the fixing tool 7 joined to the tension material 3 can be miniaturized as much as possible, and thus the fixing tool 7 can be lightened. It is possible to improve workability in transportation and construction.

Further, the tension member 3 is given a predetermined tension T1 in the directions of arrows A and B in the figure, and therefore, the fixing member fixed on the arrow B side of the tension member 3 via the expansion member BZ. A reaction force T2 against the tension T1 acts on the sleeve 9 of No. 7 in the arrow A direction. By the way, the arrow A side of the sleeve 9 of the fixing tool 7 is in contact with the washer 6 of the concrete member 2, and therefore the reaction force T acting on the sleeve 9
2 is a compressive force F1 against the concrete member 2 through the sleeve 9 and the washer 6. That is, the side of the tension member 3 on the arrow B is fixed via the fixing tool 7 joined to the tension member 3. On the other hand, since the tension A 3 is also fixed to the concrete member 2 by an appropriate fixing means (not shown) on the arrow A side, a reaction force (not shown) against the tension T1 acts on the fixing means in the arrow B direction. ,
A compressive force (not shown) acts on the concrete member 2 in the direction of arrow B via the fixing tool. That is, the compressive force F1 from the arrow A, B side to the concrete member 2
Etc. are balanced in the concrete member 2, and these compressive forces F1 etc. are prestressing to the concrete member 2.

Since the precast concrete structural member 1 is constructed as described above, the precast concrete structural member 1 is constructed by fixing the tendons 3 to the concrete member 2 as follows. First, the tension member 3 is installed in the sheath 5, and the sleeve 9 of the fixing tool 7 is installed on the surface 2a side of the concrete member 2 so that one opening of the sleeve 9 contacts the washer 6 in the direction of arrow A. To do. To install the sleeve 9, the tip side of the tension material 3 on the arrow B side is passed through the closing plug members 11, 11 of the sleeve 9 and the expansion material filling space 10, and thus the tip of the tension material 3 on the arrow B side (not shown). No.) is pulled out of the sleeve 9 in the direction of arrow B. Before installing the sleeve 9 of the fixing tool 7 on the tension member 3, by immersing the fixing portion 3b near the tip side of the tension member 3 on the arrow B side in advance in the resin adhesive JS, a plurality of linear members can be formed. The resin adhesive JS is applied to the bundle of 3a.

Next, the tip end of the tension member 3 on the arrow B side is pulled in the direction of the arrow B by a jack or the like (not shown) so as to obtain a reaction force to the concrete member 2, and a predetermined tension T1 is applied to the tension member 3 (note that It is assumed that the not-shown tip side of the tension member 3 on the arrow A side is previously fixed to the concrete member 2 by an appropriate fixing means (not shown). Thereafter, while keeping the tension member 3 pulled by the jack or the like, the sleeve 9 of the fixing device 7 is temporarily fixed to the washer 6 of the concrete member 2 by an appropriate method, and expanded from the expansion material injection port 13 formed in the sleeve 9. The material BZ is injected and filled in the expansive material filling space 10 (at the same time as the injection, the air in the expansive material filling space 10 is discharged from the air vent 12).
When the expansive material BZ is filled and solidified, the tension T1
The tension member 3 to which the tension member 3 is applied is fixed between the tension member 3 and the sleeve 9 of the fixing member 7, and thus the tension member 3 and the fixing member 7 are joined (the bundle of the plurality of linear members 3a is adhered to each other). By filling the expansive material BZ before the resin adhesive JS existing therein is solidified, the resin adhesive JS and the expansive material BZ can be made to fit well to each other. It is more convenient because the adhesion between them is enhanced.).

After the expansive material BZ is solidified, the tension member 3 is unpulled by the jack or the like (not shown) and the jack is removed. Due to the removal, the tension T1 applied to the tension member 3 acts on the sleeve 9 of the fixing device 7 as a reaction force T2 indicated by an arrow A.
And acts as a compressive force F1 in the direction of arrow A on the concrete member 2 via the sleeve 9 and the washer 6. That is, the tension member 3 was fixed to the concrete member 2 via the fixing tool 7. The compressive force F1 in the direction of arrow A to the concrete member 2 is balanced with the compressive force (not shown) from the opposite side in the concrete member 2 described above. Become. That is, the construction of the precast concrete structural member 1 was completed.

[0014]

As described above, according to the first aspect of the present invention, the fixing tool main body such as the sleeve 9 is provided, and the fixing material filling space such as the expansive material filling space 10 is cylindrical in the fixing tool main body. And a fixing member such as a fixing member 3b of the tension member is inserted into the fixing member filling space, such as a bundle of tension members 3 made of linear members such as a plurality of linear members 3a. And the fixing portion of the tension member is formed integrally with each other through an adhesive such as a resin adhesive JS, and the fixing member main body and the tension member are fixed in the fixing material filling space. Since the fixing material such as the expansive material BZ and the high-strength mortar is provided so as to fill the space between the parts, the tension material and the fixing material formed by integrating a plurality of linear members are fixed to each other. By doing so, all the individual linear members constituting the tension member are directly or indirectly fixed to the fixing member. It is. Further, since the plurality of linear members integrated with each other via the adhesive are closely arranged with each other, that is, the gap space formed between the linear members is made as small as possible, the plurality of linear members are The size of the fixing portion of the tension material, which is a bundle of strip-shaped members, is minimized. Therefore, the size of the fixing tool into which the fixing portion is inserted can be reduced, the weight of the fixing tool and the like can be reduced, and workability in transportation and construction can be improved. Further, as a device for fixing the individual linear members with the fixing material to improve the reliability of the joining of the tension member and the fixing tool, the plural linear members are integrated, and the plurality of linear members are integrated. Since the integration of the members can be realized by a simple work such as applying an adhesive to the fixing portion of the tension material, the reliability of the joining of the tension material and the fixing tool is easily improved without complicated work. .

A second aspect of the present invention is a fixing tool such as a fixing tool 7 having a fixing tool body such as a sleeve 9 in which a fixing material filling space such as an expansion material filling space 10 is formed in a tubular shape. When joining a tension member such as a tension member 3 formed of a linear member such as a plurality of linear members 3a in a bundle, a resin adhesive JS or the like to the fixing portion such as the fixing portion 3b of the tension member. The adhesive is applied, the fixing portion of the tension member is inserted into the fixing material filling space of the fixing tool body, and the fixing material filling space is filled between the fixing tool body and the tension material. Expansion material BZ,
Since the fixing material such as high-strength mortar is injected, after the adhesive applied to the tension material is solidified, the plurality of linear members constituting the tension material are fixed and integrated with each other. . Therefore, when the joining of the tension material and the fixing tool is completed, the tension material and the fixing material formed by integrating a plurality of linear members are fixed, and the individual linear members forming the tension material. Are fixed directly or indirectly to the fixing material.
That is, in the present invention, a plurality of linear members are integrated as a device for fixing the individual linear members to the fixing material and improving the reliability of the joining of the tension material and the fixing tool. The integration of the plurality of linear members is realized by a simple operation such as applying an adhesive to the fixing portion of the tension member. That is, the reliability of joining the tension member and the fixing device is easily improved without complicated work. Further, since the fixing portion of the tension member is integrated with the adhesive agent, the plurality of linear members forming the tension member are closely arranged to each other. That is, since the gap space formed between the linear members can be made as small as possible, the size of the fixing portion of the tension material, which is a bundle of a plurality of linear members, can be made as small as possible. Therefore, it is possible to use a smaller fixing tool into which the fixing portion is inserted, and thus the weight of the fixing tool and the like can be reduced, and workability in transportation, construction, etc. can be improved.

A third aspect of the present invention is the method for joining a tension member and a fixing tool according to the second aspect, wherein the fixing material is injected into the fixing material filling space and applied to the tension material. Since it is configured to be performed before the adhesive is solidified, in addition to the effect of the second invention, the unsolidified adhesive is effectively blended with the fixing material, so that the adhesive is integrated with the adhesive. The adhesive force between the tension material and the fixing material is improved, and the reliability of joining the tension material and the fixing tool is further improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a joining structure of a tension member and a fixing tool according to the present invention.

2 is an end view taken along line X1-Y1 of FIG.

[Explanation of symbols]

 3 ... tension material 3a ... linear member 3b ... fixing part 7 ... fixing tool 9 ... fixing tool body (sleeve) 10 ... fixing material filling space (expanding material filling space) BZ ... fixing material (expanding) Material) JS ... Adhesive (resin adhesive)

Claims (3)

[Claims] 1. A fixing device main body, wherein a fixing material filling space is formed in a cylindrical shape in the fixing device main body, and a bundle-like tension member composed of a plurality of linear members is provided in the fixing material filling space. The fixing portion of the tension material is provided so as to be inserted, and the fixing portion of the tension material is formed integrally with each other through an adhesive, and the fixing tool main body and the tension material are provided in the fixing material filling space. A joint structure of a tension member and a fixing tool, which is configured by providing a fixing material so as to fill the space between the fixing portion and the fixing portion. 2. When the fixing tool having a fixing tool main body in which the fixing material filling space is formed in a cylindrical shape and the tensioning material composed of a plurality of bundled linear members are joined to each other, the tensioning material is provided. Adhesive is applied to the fixing portion of the fixing member, the fixing portion of the tension member is inserted into the fixing member filling space of the fixing device body, and the fixing member filling space is filled between the fixing device body and the tension member. A method of joining a tension material and a fixing tool, which is configured so that the fixing material is injected in the form of an arrow. 3. The method for joining a tension member and a fixing tool according to claim 2, wherein the fixing material is injected into the fixing material filling space before the adhesive applied to the tension material is solidified. A method for joining the tension member and the fixing device configured as described above.