JPH0782805A - Reinforcing structure for joint of concrete made member - Google Patents

Abstract

PURPOSE:To eliminate various restrictions caused by existence of a joint and to satisfactory accomplish jointing work at a job site without any special complication by reinforcing a joint part to make it a joint structure capable of preventing to its utmost, the problem of check and damage easily taking place on the joint part of concrete made members. CONSTITUTION:In the case of the reinforcing structure of the joint part of a concrete made member for jointing both concrete made members 1, 2, which are to be jointed together through joints 5a protruding beyond the respective joint end surfaces 1b, 2b, a fiber reinforcement material containing cement reinforcement panel 10, which is placed across both concrete made members, is affixed to the surface near the joint end faces of both concrete made members 1, 2. This reinforce panel 10 is bolted to both concrete made members 1, 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to the case where various reinforced concrete structures in civil engineering and construction, etc. are used as a reinforcing technique for jointing concrete members such as precast concrete. The present invention relates to a concrete member reinforcing structure for a joint.

[0002]

2. Description of the Related Art For example, various reinforced concrete structures such as columns and beams of buildings, walls, and box culverts and bridge piers used in civil engineering work have hitherto been predominantly on-site construction using cast-in-place concrete.

However, in the case of the reinforced concrete construction by the on-site construction, a great deal of labor and a long construction period are required for the formwork and the bar arrangement work, so in recent years, such various reinforced concrete structures have been precast as much as possible. By making it into a concrete member and producing it in a factory, and by assembling these precast concrete members by joining them at the construction site, the work on the site is reduced, the construction period is shortened,
The so-called precast technology, which can reduce the construction cost and improve the quality, has been widely adopted.

By the way, in order to construct a reinforced concrete structure with such precast concrete members (hereinafter referred to as concrete members), a technique for joining the concrete members to each other in good strength condition is required. As this joining technique, conventionally, a joint streak projecting from each joining end face of both concrete members to be joined together is used as a lap joint, and a filling material such as mortar is filled between the joining end faces of both concrete members. The technique of joining by this was general.

[0005]

However, in such a conventional joint structure, since basically the concrete members are butted to each other,
The joint portion is weaker in strength than other portions, so that there is a problem that a large crack is generated in the joint portion or the joint portion is rapidly broken. Therefore, as a solution to this point, reinforcing bars such as stirrup bars are also arranged in the lap joint part of the reinforcing bar,
After all, due to the structure of the joint portion, the above-mentioned problems such as cracking and breakage still remain.

And, because of such a problem,
When precasting a reinforced concrete structure, what kind of part should the joint be located, in other words, the constraint that the joint should be located at a position where strength is not a problem, Depending on the type of product, there were restrictions such as difficulty in precasting.

Therefore, in the present invention, the joint portions are reinforced so as to have a joint structure capable of preventing the problems of cracks and breakages, which are likely to occur at the joint portions between concrete members, as much as possible. It is an object of the present invention to provide a joint part reinforcing structure for a concrete member which eliminates various restrictions due to the above, and can favorably perform on-site joining work without particularly complicating.

[0008]

The invention according to claim 1 is
In a joint part reinforcing structure of a concrete member to be joined through a joint projecting from the respective joint end faces of both concrete members to be joined to each other, on the surface near the joint end faces of the both concrete members, The present invention is characterized in that a cement-based reinforced panel containing a fiber reinforcing material that is bridged between members is additionally provided, and this reinforced panel is bolted to both concrete members.

According to a second aspect of the present invention, a recess for fitting the reinforced panel is provided on the surface of each of the concrete members according to the first aspect in the vicinity of the joint end face of each of the members, and the recess is used for bolting. It is characterized by the provision of screw holes.

[0010]

According to the first aspect of the invention, the reinforced panel exerts the function of reinforcing the joint portion of the concrete member and remarkably improving the joint strength. In particular, this reinforced panel is made of cement-based material with fiber reinforcement,
Since cracks and breakage do not occur easily, and the main body of this reinforced panel is a cement-based material such as mortar,
Adhesiveness with the filler such as non-shrink mortar or the like filled in the joint portion and integration action are also improved. Therefore, by these actions, the reinforcing effect of the joint portion between the concrete members is remarkably improved. In addition, this reinforcing panel also functions as a form when filling a filler such as mortar between the joint end faces, and also functions as positioning and centering when joining concrete members together. To do. Further, since the reinforcing panel is attached by bolts, the attaching work can be performed very easily.

According to the second aspect of the present invention, since the recesses into which the reinforcing panels are fitted are provided on the surfaces of the two concrete members near the respective joint end faces, the joint portions of the two concrete members are different from each other. It is possible to prevent the shape from bulging from the part. Further, since one side of the reinforced panel and both end surfaces in the joining direction come into contact with the recess, the resistance action against shearing, bending, etc. is correspondingly increased.

[0012]

EXAMPLES A concrete member reinforcing structure for concrete members according to the present invention will be described below with reference to the accompanying examples shown in FIGS. The embodiment shown in the figure shows an example in which the present invention is applied to a joint structure of a plurality of concrete members for constituting a wall of a building made of reinforced concrete, or a wall portion of a box culvert, or the like. is there.

In these figures, reference numerals 1, 2 and 3,
Reference numeral 4 is a concrete member that is butt-joined to each other in the lateral direction and the vertical direction, and is configured as a so-called half precast concrete member here. And, a plurality of reinforcing bars 5 are arranged vertically and horizontally and embedded in them, and a part of these reinforcing bars 5 projects from the joint end faces of the concrete members 1, 2 and 3, 4. This allows the joint 5 to be used as a lap joint.
a is formed.

Further, the surfaces of the concrete members 1, 2 and 3, 4 near the joint end faces 1b, 2b and 3b, 4b in the lateral direction are notched in an L shape from the side surface of the concrete member to the joint end face. Shaped recesses 1c, 2c and 3
c and 4c are provided respectively. Each of the recesses 1c, 2c and 3c, 4c is provided with a plurality of screw holes 6 ... The screw hole 6 may be formed directly on a concrete member, or may be formed by embedding an insert fitting or the like provided with a female screw. Further, on the upper surfaces (longitudinal joint end faces) 1d and 2d of the concrete members 1 and 2, there are provided grooves 7 having a uniform width and depth for filling the joint filler M such as non-shrink mortar. It is provided. Therefore,
The joint 5a on the joint end surface 1d, 2d side where the groove 7 is provided is exposed in the groove 7 and is formed to have a length similar to the depth of the groove 7.

Reference numeral 10 serves to reinforce the joint between the concrete members 1 and 2 and to bridge (attach) the concrete members 1 and 2 and fix them there as shown in FIG. This is a cement-based reinforced panel to be used. The reinforced panel 10 is a high-strength panel reinforced by mixing reinforcing fibers, metal fibers such as stainless steel, carbon fibers such as carbon, resin fibers such as vinylon, etc. in a layered arrangement. It is constructed as a strength-enhancing panel. Further, the reinforced panel 10 is formed in a rectangular plate shape as a whole, and the plate thickness thereof is formed to be substantially the same as the depth of the recesses 1c, 2c, whereby the recesses 1c, 2c are tightly fitted. Is formed.

Further, as shown in FIG. 1, the reinforced panel 10 is provided with bolt holes 10b for fixing the reinforced panel 10 to the concrete members 1 and 2 with bolts 11, respectively. As the bolt 11, a carbon bolt having high corrosion resistance and high strength is used.

In joining the concrete members 1, 2 and 3 and 4 having such a joining structure, first, in order to join the concrete members 1 and 2 in the lateral direction, as shown in FIG. 5a should come close to each other,
The reinforcement panel 10 is fixed to the concrete members 1 and 2 by fitting the reinforcement panels 10 into the recesses 1c and 2c, respectively, and screwing the bolts 11 into the screw holes 6, respectively.

For joining in the longitudinal direction, the joining end face 1
While the upper and lower joint end surfaces of d, 2d, etc. are roughened with a piecing surface treatment material, as shown in FIGS. 2 and 3, the groove 7 is filled with a filler M such as non-shrink mortar. , The concrete members 3 and 4 are dropped from above, and the joint 5a thereof is immersed in the filler M and joined. It should be noted that the vertical joining end faces 1d, 2d around the groove 7 are formed.
Although the filler M such as non-shrink mortar may be applied to the part as well, in consideration of surface contamination due to the filler flowing out from between the joining surfaces due to the pressure welding at the time of joining, the concrete adhesive after joining Is preferably filled.
In addition, although not particularly illustrated here, a lateral joint end face 1b between the concrete members 1, 2 and 3, 4,
Fillers such as mortar are also filled between 2b and 3b, 4b. If necessary, reinforcement bars such as hoop muscles may be arranged in the lap joints 5a and 5a as in the conventional case.

When the concrete members are joined to each other in such a structure, the reinforcing panel 10 reinforces the joint portion of the concrete members and exhibits an action of remarkably improving the joint strength. In particular, since the reinforced panel 10 is formed of mortar reinforced with fibers, cracking and breakage are unlikely to occur, and the main body of the reinforced panel 10 is a cement-based material such as mortar, so that the joint portion is filled. Adhesiveness and integration with fillers such as non-shrink mortar, etc., are also good, and therefore, by these actions
The effect of reinforcing the joints between concrete members is significantly improved compared to the conventional measures such as reinforcing bars such as hoop reinforcing bars at the ends.

The reinforcing panel 10 also functions as a form when filling a filler such as mortar between the joint end faces, and further serves as positioning and centering when joining the concrete members together. Functions are also demonstrated. Further, since the reinforcing panel 10 is attached by bolts, there is also an advantage that the attaching operation can be performed very easily.

Further, the concrete members 1, 2 and 3,
The reinforced panel 10 is provided on the surface of each of
Since the recesses 1c, 2c and 3c, 4c for fitting with are respectively provided, it is possible to prevent the joint portion of the concrete member from having a shape that is more bulged than other portions. Further, when the reinforcing panel 10 is attached, one side of the reinforcing panel 10 and both end surfaces in the joining direction come into contact with each recess, so that the reinforcing panel 1
Compared to the case where 0 is simply added without a recess,
The resistance action against shearing and bending increases accordingly.

In the embodiment, the reinforcing panel 10 is used.
Although the example in which the above is provided only on one side of the joint portion is shown, the reinforcing panel 10 may be provided on both sides for reinforcement as shown in FIG. 4, for example. In this case, the reinforcing effect of the joint can be further enhanced.

Further, in the embodiment, the example of the reinforcing panel 10 used for the horizontal joining is shown. However, as shown in FIG. 5, for example, the length of some reinforcing panels in the vertical direction is made the concrete member 1, Using the reinforced panel 20 and the like which are shorter than the height dimensions of 2 and 3 and 4, the reinforced panel 10 is attached so as to be bridged over the upper and lower concrete members 1, 3 and 3, 4 and bolted. You may make it a reinforcement structure. By doing so, there is an effect that one reinforcing panel 10 can perform not only the horizontal joining of the concrete members but also the vertical joining thereof.

[0024]

As described above, according to the joint part reinforcing structure of the concrete member according to the present invention, the following excellent effects can be obtained.

According to the joint portion reinforcing structure of the concrete member of the first aspect, the reinforcing panel reinforces the joint portion of the concrete member, and the joint strength can be remarkably improved. In particular, since this reinforced panel is formed of a cement-based material containing fiber reinforcement, cracks and fractures are less likely to occur, and since the main body of this reinforced panel is a cement-based material such as mortar, the joint part Adhesiveness with the filling material such as non-shrink mortar to be filled and integration action are also improved. Further, since the reinforcing panel is attached by bolts, the attaching work can be performed by an extremely simple work. Therefore, the joints should be reinforced so that the joint structure can prevent the problems of cracks and breakage that tend to occur at the joints between concrete members as much as possible, thereby eliminating various restrictions due to the existence of joints. In addition, there is an excellent effect that the joining work on the site can be favorably carried out without being particularly complicated.

According to the joint part reinforcing structure of the concrete member described in claim 2, since the recesses into which the reinforcing panels are fitted are provided on the surfaces near the joint end faces of both concrete members, It is possible to prevent the joint portion of the concrete member from having a bulged shape compared to other portions. In addition, since the structure is such that one side of the reinforced panel and both end faces in the joining direction are brought into contact with the recess, respectively, the resistance action against shearing and bending can be correspondingly increased.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view showing an embodiment of the present invention.

FIG. 3 is a partial cross-sectional perspective view showing an embodiment of the present invention.

FIG. 4 is a plan view showing another embodiment of the present invention.

FIG. 5 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

 1,2,3,4 Concrete member 1b, 2b, 3b, 4b Joint single surface (lateral direction) 1c, 2c, 3c, 4c Recess 1d, 2d Joint end face 5 Rebar 5a Joint 6 Screw hole 7 Groove 10 Reinforced panel 10a bolt hole 11 bolt 20 reinforced panel

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area E04B 2/56

Claims (2)

[Claims] 1. A joint member reinforcing structure for concrete members, which is joined through joints protruding from respective joint end faces of both concrete members to be joined to each other,
On the surface near the joint end face of the both concrete members, a cement-based reinforced panel containing a fiber reinforcement that is bridged between the both concrete members is added, and the reinforced panel is bolted to the both concrete members. A joint reinforcement structure for concrete members characterized by being stopped. 2. The joint member reinforcing structure for a concrete member according to claim 1, wherein a recess for fitting the reinforcing panel is provided on the surface of each of the concrete members near the joint end face, and the recess is provided. A reinforcing structure for joints of concrete members, characterized in that screw holes for bolting are provided in the.