JPH11190194A - Concrete structure joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint construction of a concrete structure which can be manufactured at low cost while having a large anchorage force for concrete. SOLUTION: In a joint construction of a concrete structure, a steel joint plate 11 having a joint mechanism is provided at the junction of the concrete structure 15. A plurality of anchor steel plates 12 each serving as a concrete anchorage mechanism having openings 10 are vertically secured to the steel joint plate 11 while being arranged in parallel, and are buried in the concrete structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to reinforced concrete structures, segments, concrete blocks such as precast concrete products and the like used in the fields of civil engineering, construction and tunnels (hereinafter collectively referred to as concrete structures).
The present invention relates to a joint structure.

[0002]

2. Description of the Related Art A conventional joint structure in a reinforced concrete structure or the like generally has a structure shown in FIGS. In the first conventional example shown in FIG. 17, an anchor rebar 2 is butt-butted to a joint plate 1 from the back thereof, and a groove welding 3 (FIG. 18).
Or the anchor rebar 2 is screwed 4
(Shown in FIG. 19), and concrete is cast so that the joint plate 1 is disposed on the joint surface 6 of the concrete structure 5. A bolt box (bolt fastening work space) forming frame 7 is fixed to the back surface of the joint plate 1.

[0003] In a second conventional example shown in Fig. 20, an anchor reinforcing bar 2 is provided on both side plates of a bolt box 8 surrounded on four sides by steel plates.
Are fixed by fillet welding 9 (shown in FIG. 21), and the front plate 8a of the bolt box 8 has a bolt insertion hole 8b, and concrete is cast so as to be disposed on the joint surface 6 of the concrete structure 5. Have been.

[0004]

In the conventional joint structure,
As an anchor mechanism, an anchor reinforcing bar is fixed to a joint plate or a bolt box (partition plate, concrete dam plate), and a steel material processing step such as welding fixing of the reinforcing bar or screw fixing leads to a large increase in cost. In particular, when the size of the anchor reinforcing bar is increased, the amount of welding is enormous due to the butt groove welding of the reinforcing bar of the joint plate 1 and the fillet welding of the reinforcing bar to the partition plate, which leads to an unrealistic cost increase. In such a case, it is difficult to obtain a developed shape for welding the plate and the bar, and the problem of the amount of welding is a fatal issue.

[0005] In particular, the most popular fillet welding of rebar is difficult to ensure quality and has low quality reliability. In addition, deformed reinforcing bars with knots may be used to increase the anchorage with concrete, but in this case, the quality of fillet welding is further reduced, the welding amount is large, and the cost is also large. .

Further, the anchoring length of the reinforcing bar is required to be 30 to 50 times as large as the diameter of the reinforcing bar, which hinders the arrangement of the reinforcing bars on the concrete block side. Further, the anchor rebar cannot serve also as a weir plate for forming a bolt fastening space (bolt box), and requires a partition plate of a required length separately from the rebar.

An object of the present invention is to provide a joint structure for a concrete structure which has solved the above-mentioned problems.

[0008]

To achieve the above object, the present invention provides a joint structure for a concrete structure.
At the joint of the concrete structure, a steel joint plate having a joint mechanism is provided, and a plurality of anchor steel plates having openings serving as concrete anchoring mechanisms are provided on the steel joint plate perpendicularly to the steel joint plate. And are arranged and fixed in parallel with each other and buried in the concrete structure. In the present invention, the steel joint plate and the anchor steel plate are formed in a substantially U-shape by welding a plurality of members or integrally bending. Further, in the present invention, a reinforcing bar is penetrated through an opening of the anchor steel plate, or a periphery of the anchor steel plate is surrounded by a reinforcing bar. Further, in the present invention, the steel joint plate is provided with a bolt insertion hole, and the steel joint plate is surrounded by the steel joint plate and the anchor steel plates which are perpendicular to the steel joint plate and arranged in parallel with each other. It is characterized in that a space for bolt fastening work is provided at the back of the plate.

According to the present invention, since the anchor mechanism is made of a steel plate, it is easy to fix it to the steel joint plate by welding, and when both members are integrally formed by bending or the like,
No welding is required, making it easier to manufacture. In addition, the anchor steel plate has an opening, and the poured concrete flows into and hardens into this, and is synthesized and integrated, thereby providing a large concrete fixing mechanism. In particular, when concrete is subjected to passive deformation constraint such as a steel shell or a reinforcing bar, a larger concrete anchoring mechanism is provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a joint structure of a reinforced concrete structure 15 according to the first embodiment, and includes a plurality of opening portions as a fixing mechanism for fixing a joint 15 from a steel joint plate 11 having bolt insertion holes 13 to a concrete 15a. 10
An anchor steel plate 12 having the following structure is disposed vertically and in parallel with the steel joint plate 11, and is fixed to the steel joint plate 11 by welding.

In the joint structure of the reinforced concrete structure 15 according to the first embodiment, when the steel joint plate 11 to which the anchor steel plate 12 is joined is disposed at a predetermined place and the concrete 15a is cast, the concrete is fixed to the anchor steel plate. 1
Since it flows into and hardens into the opening 10 of the second and is synthesized and integrated, the fixing function between the anchor steel plate 12 and the concrete is remarkably increased. In particular, when the concrete is subjected to passive deformation constraint such as a steel shell or a reinforcing bar, the concrete anchoring mechanism becomes even larger.

The opening 10 is provided with a steel joint plate 11.
When viewed from the perspective, a plurality of anchor steel plates 12 are provided at the rear portion 12b, and the anchor steel plate 12 is not provided at the front portion 12a. Between the anchor steel plates 12 to be opened and the front part 1 where the opening 10 is not provided.
By arranging a temporary formwork (not shown) on the 2a and pouring concrete, the front portion 12a of the anchor steel plate 12 acts as a partition plate on both sides of the bolt box, and the space for bolt fastening work smoothly. Can be formed. The anchor steel plate 12 has a thickness of about 12 mm, and an opening in the anchor steel plate 12 can be easily produced at low cost by a punching shear or the like.

Further, in the joint structure of the first embodiment, since the anchor mechanism is a steel plate, the anchor steel plate 12 and the steel joint plate 11 can be easily fixed by welding. Also, if necessary, the steel joint plate 11 and the anchor steel plate 12
As a joining mechanism, there is a method in which a joining jig such as a bolt, a stud, a reinforcing bar, a hook, or the like is implanted into the steel joint plate 11 or a bolt is inserted into the steel joint plate 11.

FIG. 2 shows a joint structure of a reinforced concrete structure 15 according to a second embodiment. In FIG. 2, an opening 10 and a bolt insertion hole 13 are punched and formed in a steel material having a predetermined length with a punching shear or the like, and the steel material having the predetermined length is bent into a substantially U-shape to form a steel joint plate 11 and a hole. An anchor steel plate 12 having a portion 10 is integrally formed. Other configurations are the same as the joint structure of the first embodiment.

In the joint structure of the second embodiment, a bolt box is formed in the same manner as the joint plate 11 and the first embodiment by bending a single steel plate having a plurality of openings 10 at both ends. The two anchor steel plates 12 also serving as a partition plate for welding can be manufactured at once at a low cost without welding.

FIG. 3 shows a joint structure of a reinforced concrete structure 15 according to a third embodiment. This third
In the embodiment, a bottom partition plate 16 for forming a bolt box is fixed to the back of the steel joint plate 11 and between the lower end surfaces of the parallel anchor steel plates 12 by welding. The height of the front part 12a of the anchor steel plate 12 where the opening 10 is not provided is higher than the height of the rear part 12b where the opening 10 is provided, and the upper edge of the connection between the front part 12a and the rear part 12b. Are connected by a slope 12c. The figure shows an example in which a bolt 18 for a joint is inserted into a bolt insertion hole 13 of a steel joint plate 11. The anchor steel plate 12 is fixed to the steel joint plate 11 by groove welding 23, and other configurations are the same as those of the joint structure according to the first embodiment.

In the third embodiment, the steel joint plate 11, the anchor steel plate 12, the bottom partition plate 16, the rear temporary mold, and the bottom temporary mold frame are not used at the time of concrete filling to form a bolt fastening work space. Since the bolt box can be formed by a frame (not shown), the concrete does not flow into the concrete at the time of placing the concrete, so that a space for bolt fastening work can be formed smoothly. In addition, by increasing the height of the front portion 12a of the anchor steel plate 12 to the required size, the concrete does not flow into the inside during concrete casting, the bolt box can be formed smoothly, and the rear portion 12b of the anchor steel plate 12 can be formed. Reducing the height to the required dimensions saves steel. FIG. 4 is a perspective view showing an example in which two reinforced concrete structures are joined using the joint structure according to the third embodiment.

FIG. 5 shows a joint structure of a reinforced concrete structure 15 according to a fourth embodiment. In FIG. 5, a reinforcing reinforcing bar 14 is inserted into the opening 10 of the anchor steel plate 12. Further, the height of the front part 12a of the anchor steel plate 12 where the opening 10 is not provided is higher than the height of the rear part 12b where the opening 10 is provided, and the upper edge of the connection between the front part 12a and the rear part 12b. Are connected by the slope 12c in the same manner as in the third embodiment. Other configurations are the same as the joint structure according to the first embodiment.

In the anchor steel plate 12, even if the opening 10 is merely opened, the concrete flows into the opening 10 and hardens, so that the anchoring force to the concrete can be obtained. By penetrating the required amount of reinforcing reinforcing bars 14 through the portion 10, the passive external restraining force is increased, and the anchoring force between the anchor steel plate 12 and the concrete is dramatically improved.

FIG. 6 shows a joint structure of a reinforced concrete structure 15 according to a fifth embodiment. This fifth
In the embodiment, a bottom partition plate 16 and a rear partition plate 17 are fixed to the back of the steel joint plate 11 and between the parallel anchor steel plates 12 by welding.
1, anchor steel plate 12, bottom partition plate 16, and rear partition plate 1
7 together form a bolt box 19. Other configurations are the same as the joint structure according to the first embodiment. According to the fifth embodiment, it is possible to work smoothly so that concrete does not flow into the bolt box 19 without using a temporary formwork at the time of placing concrete.

FIG. 7 shows a joint structure of a reinforced concrete structure 15 according to a sixth embodiment. This sixth
In the embodiment, in addition to the configuration of the fifth embodiment shown in FIG.
Surrounded by. Other configurations are the same as those of the fifth embodiment. According to the sixth embodiment, the provision of the rectangular spiral surrounding rebar 24 dramatically improves the anchoring force between the anchor steel plate 12 and the concrete, and significantly increases the strength of the joint.

FIG. 8 shows a joint structure of a reinforced concrete structure 15 according to a seventh embodiment. This seventh
In the embodiment, in addition to the configuration of the fifth embodiment of FIG. 6, the periphery of the anchor steel plate 12 is surrounded by a hoop-shaped reinforcing reinforcing bar 25. Other configurations are the same as those of the fifth embodiment. According to the seventh embodiment, the provision of the hoop-shaped reinforcing steel bar 25 dramatically improves the anchoring force between the anchor steel plate 12 and the concrete, and significantly increases the strength of the joint.

FIG. 9 shows a joint structure of a reinforced concrete structure 15 according to an eighth embodiment. This 8th
In the embodiment, in addition to the configuration of the fifth embodiment shown in FIG. Other configurations are the same as those of the fifth embodiment. According to the eighth embodiment, the provision of the bar-shaped reinforcing bars 26 dramatically improves the anchoring force between the anchor steel plate 12 and the concrete, and significantly increases the strength of the joint.

FIGS. 10 and 11 show a joint structure of a reinforced concrete structure 15 according to a ninth embodiment. In the ninth embodiment, a reinforcing reinforcing bar 14 is inserted into an opening 10 formed in an anchor steel plate 12. The bolt box 19 is formed at the rear of the steel joint plate 11 in the same manner as in the fifth embodiment of FIG. 6, and the upper edges of the front 12a and the rear 12b of the anchor steel plate 12 are inclined. The connection at 12c is the same as in the third embodiment in FIG.

According to the ninth embodiment, the anchor steel plate 12
The reinforcing steel 14 penetrates the opening 10 and the surrounding of the anchor steel plate is surrounded by the reinforcement, so that the passive external restraining force is increased, and the anchoring force between the anchor steel plate 12 and the concrete is dramatically improved. I do. In FIG. 10, the vertical bars 20 and the horizontal bars 21 arranged on the concrete structure 15, the steel joint plate 11 and the anchor steel plate 1 are provided.
2 is shown. As shown in each figure, the steel joint plate 11 and the anchor steel plate 12
0 and can be smoothly disposed in the concrete structure 15 without interfering with the weft line 21. FIG. 11 is a schematic perspective view showing a joint state of the concrete structure according to the ninth embodiment.

FIG. 12 shows a joint structure of a reinforced concrete structure according to the tenth embodiment. This first
In the zero embodiment, the steel joint plate 11 is provided to extend slightly to the right of the position of the two anchor steel plates 12 in parallel, and is perpendicular to the extension 11a and the anchor steel plate 12. In addition, a reinforcing steel plate 22 is provided in parallel.

According to the tenth embodiment, the steel joint plate 1
1, the anchoring force with the concrete 15 a is further improved by the presence of the reinforcing steel plate 22 in addition to the anchor steel plate 12. Other configurations are the same as those of the fifth embodiment shown in FIG.

FIG. 13 shows a joint structure of a reinforced concrete structure according to the eleventh embodiment. That is, in the eleventh embodiment, the steel joint plate 11 is provided to extend slightly to the right from the position of the two anchor steel plates 12 in parallel, and is perpendicular to the extension 11a, and Reinforced steel plate 2 having aperture 10 in parallel with anchor steel plate 12
2 is further provided, and the reinforcing steel 14 is pierced through the opening 10 formed in the anchor steel plate 12 and the reinforcing steel plate 22 to reinforce the strength of the concrete structure 15 and to connect the anchor steel plate 12 and the concrete. The fixing power has been dramatically improved.

FIG. 13 shows a joint structure of a reinforced concrete structure 15 according to a twelfth embodiment. In the twelfth embodiment, a steel joint plate 11 is provided so as to extend in the lateral direction, and a plurality of anchor steel plates 12 are provided by welding at a predetermined interval perpendicular to the long steel plate joint plate 11. The anchor steel plate 12 has a plurality of openings 10. Other configurations are the same as those of the third embodiment shown in FIG.

According to the twelfth embodiment, as compared with the joint structure of the third embodiment, since the number of the anchor steel plates 12 is increased, the anchoring force with concrete is improved, and the strength of the concrete structure is also remarkable. Improve.

Note that the present invention is not limited to the above-described embodiments, and by appropriately combining these embodiments,
Still another form of a joint structure for a concrete structure can be configured.

[0032]

As described above, according to the joint structure of the present invention, since the anchor mechanism is a steel plate, it is easy to fix it to the steel joint plate by welding, and both members are bent with one steel plate. When it is formed, welding is not required, and manufacturing is easier. In addition, the anchor steel plate has an opening, and the poured concrete flows into it and hardens to be synthesized and integrated, resulting in a large concrete anchoring mechanism. When subjected to passive deformation constraints such as shells and reinforcing bars, the anchoring force between the anchor steel plate and concrete is dramatically improved. In addition, the structure of the joint portion is simpler than that of the conventional anchor rebar, and the joint load can be reliably transmitted to the concrete structure main body and the integrated composite structure can be achieved at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view of a joint structure of a concrete structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a joint structure according to a second embodiment.

3A is a longitudinal side view of a joint structure according to a third embodiment, FIG. 3B is a left side view of FIG. 3A, and FIG. 3C is a plan view of FIG.

FIG. 4 is a concrete diagram illustrating the joint structure according to the third embodiment.
FIG. 4 is a schematic perspective view of a bonded state of the structure.

FIG. 5 is a perspective view of a joint structure according to a fourth embodiment.

FIG. 6 is a perspective view of a joint structure according to a fifth embodiment.

FIG. 7 is a perspective view of a joint structure according to a sixth embodiment.

FIG. 8 is a perspective view of a joint structure according to a seventh embodiment.

FIG. 9 is a perspective view of a joint structure according to an eighth embodiment.

FIG. 10A is an explanatory side view of the ninth embodiment, and FIG.
3A is a left side view of FIG. 3A, and FIG. 3C is a plan view of FIG.

FIG. 11 is a schematic perspective view of a joined state of a concrete structure implementing the joint structure of the ninth embodiment.

FIG. 12 is a schematic perspective view of a joined state of a concrete structure implementing the joint structure of the tenth embodiment.

FIG. 13 is a schematic perspective view of a joined state of a concrete structure implementing the joint structure of the eleventh embodiment.

FIG. 14 is a schematic perspective view of a joined state of a concrete structure implementing a joint structure according to a twelfth embodiment.

15 is a partial left side view of FIG.

16 is a partial cross-sectional plan view of FIG.

FIG. 17 is a perspective view showing a joint structure of a concrete structure according to a first conventional example.

FIG. 18 is a cross-sectional view of a first joining example of the anchor-rebar and the joint plate in FIG.

19 is a cross-sectional view of a second example of joining the anchor-rebar and the joint plate in FIG.

FIG. 20 is a perspective view showing a joint structure of a concrete structure according to a second conventional example.

FIG. 21 is a cross-sectional view showing an example of joining an anchor-rebar and a partition plate in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint plate 2 Anchor rebar 3 Butt groove welding 4 Screw-in 5 Concrete structure 6 Welding surface 7 Bolt box formation frame 8 Bolt box 8a Front plate 9 Fillet welding 10 Opening 11 Steel joint plate 11a Extension REFERENCE SIGNS LIST 12 anchor steel plate 12 a front 12 b rear 12 c slope 13 bolt insertion hole 14 reinforcing steel 15 reinforced concrete structure 15 a concrete 16 low partition plate 17 rear partition plate 18 joint bolt 19 bolt box 20 vertical bar 21 Weft line 22 Reinforced steel plate 23 Groove welding 24 Rectangular spiral surrounding reinforcing bar 25 Hoop-shaped reinforcing bar 26 Bar-shaped reinforcing bar

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 5/02 E04C 2/30 V E04C 2/30 E21D 11/08 E21D 11/08 E04B 1/60 503D

Claims (5)

[Claims] In a joint structure of a concrete structure, a steel joint plate having a joint mechanism is provided at a joint of the concrete structure, and the steel joint plate has an opening serving as a concrete anchoring mechanism. A joint structure for a concrete structure, wherein a plurality of anchor steel plates are disposed and fixed perpendicular to and parallel to the steel joint plate, and are embedded in the concrete structure. 2. The joint structure for a concrete structure according to claim 1, wherein the steel joint plate and the anchor steel plate are formed in a substantially U-shape by welding a plurality of members or by integrally bending. 3. The joint structure for a concrete structure according to claim 1, wherein a reinforcing bar is penetrated through an opening of the anchor steel plate. 4. The joint structure for a concrete structure according to claim 1, wherein a periphery of the anchor steel plate is surrounded by a reinforcing bar. 5. The steel joint plate has a bolt insertion hole,
A configuration in which a bolt fastening work space is provided at the back of the steel joint plate surrounded by the steel joint plate and the anchor steel plate that is perpendicular to the steel plate and disposed in parallel with each other. The joint structure for a concrete structure according to claim 1.