JPH11310965A - Precast concrete member and structure consisting of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precast concrete member, by which vertical joining operation at a construction site is simplified while stable vertical joining strength is obtained regardless of the degree of training of an operator, and a concrete building composed of such a member. SOLUTION: In the concrete structure 1, an arched reinforcing bar 8 exposed from the vertical joint surface 10a of one Pca member 10 is inserted into a joint groove 21 formed so that an internal void shaped to the vertical joint surface 20a of the other adjacent Pca member 20 is expanded from the width of an opening section. The vertical joint surfaces 10a, 20a are mutually joined vertically by filling a section between the vertical joint surfaces 10a, 20a including the inside of the joint groove 21 with fillers 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of a precast concrete member, and more particularly to a structure of a vertical mating surface of a precast concrete member, an auxiliary metal fitting used for the joint surface, and a precast having the vertical mating surface. The present invention relates to a concrete member and a concrete structure (a constituent material constituting a concrete building) formed by vertically joining the precast concrete members.

[0002]

2. Description of the Related Art Conventionally, a prefabricated construction method using a so-called precast concrete product (typically, a wall-type precast method or an HPC method) has been used for the purpose of shortening the construction period of reinforced concrete work on site and saving labor on site. Construction method) is being carried out. In this method, a building is constructed by assembling precast concrete members of a predetermined shape, which have been molded in advance at a factory and transferred to a site, while joining them together. In the case of joining between members on the floor and the upper floor), a so-called dry joint method is generally employed in which reinforcing bars embedded in the members are welded to each other. On the other hand, in the vertical joining (that is, joining between members such as adjacent wall materials),
Generally, a so-called wet joint method is adopted in which reinforcing bars embedded in each member are joined by means such as welding or joints, and a filler such as concrete or mortar is filled in the joints.

For example, as shown in FIG. 14 (plan view) as a typical example of a wet joint system, in a conventional wall type precast reinforced concrete structure, adjacent precast concrete members (wall materials) 101, 102,
The joining surface of 103 has joining reinforcing bars 101a, 101b, 1
02a, 102b, 103a, and 103b are embedded, respectively, and these are connected to joint reinforcing bars 104a,
4b and a joint (here, a sleeve) 101, and a filler 100
, The members 101, 102, and 103 are vertically joined to each other.

[0004]

However, in the conventional method of directly joining precast concrete members with each other by means of the above-mentioned welding and joints, complicated welding work and joint attaching work are required at the construction site. Therefore, there were limits to shortening the construction period and cost. Also,
In the joining by welding, since the joining strength is influenced by the skill level and the training level of the welding operator, the burden on quality control of the welded portion is large. For this reason, there is a demand for a direct joining method capable of obtaining a stable joining strength irrespective of the viewpoint of shortening the construction period and improving the economic efficiency and irrespective of the skill level of the operator.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to simplify a vertical joint work at a building site and to achieve a stable vertical joint regardless of the skill level of an operator. An object of the present invention is to provide a precast concrete member having high strength and a concrete building made of such a member.

[0006]

To achieve the above object, the present invention provides (i). A precast concrete member having a vertical mating surface that is vertically joined when assembled at a building site, and a part of a reinforcing bar embedded inside the concrete member is exposed at the vertical mating surface, where A part of the reinforcing bar is bent and exposed so as to form an arch shape in the vertical direction, and a plurality of the arch-shaped exposed portions are vertically arranged on the vertical mating surface (hereinafter, referred to as a precast concrete member). "The first PCa member of the present invention") and (i
i). First PC of the present invention when assembled at a building site
A precast concrete member having a vertical mating surface joined in a vertical direction corresponding to the vertical mating surface of the member a, wherein the vertical mating surface includes the reinforcing steel when joined to the first PCa member of the present invention. A joint groove into which the arch-shaped exposed portion of can be inserted is provided in the vertical direction.
The joint groove provides a precast concrete member (hereinafter, referred to as a "second PCa member of the present invention") provided such that a gap formed in the groove is wider than a width of an opening of the groove. I do.

Accordingly, the present invention relates to the first PC of the present invention.
a member and the second PCa member of the present invention are vertically inserted into each other by inserting the arched exposed portion of the reinforcing bar into the joint groove and filling the space between the vertical mating surfaces including the joint groove. The present invention provides a concrete structure that is constructed by being joined. In the concrete structure of the present invention, the joint groove provided in the vertical mating surface of the second PCa member of the present invention is provided with an arch-shaped exposed portion of the reinforcing bar which is exposed at the mating surface of the first PCa member of the present invention. A filler is filled between the vertical mating surfaces of the two PCa members while being inserted into the joints to join them. Therefore, according to the concrete structure of the present invention, stable joining strength is always realized because the concrete structure does not depend on joining means such as welding whose joining strength depends on the skill level of the worker.

Also, as described above, the first PCa of the present invention
In the member, the shape of the rebar exposed to the vertical mating surface is formed to take an arch shape along the vertical direction,
In the corresponding second PCa member of the present invention, the shape of the joint groove provided in the vertical mating surface is formed so that the gap in the groove is wider than the width of the opening. As a result,
In the vertical joint formed by filling the filler between the vertical mating surfaces (including the inside of the joint groove) while inserting the exposed portion of the reinforcing bar formed in the arch shape into the joint groove, practicality is improved. Excellent shear strength can be ensured, and separation of PCa members from each other can be suppressed to a high level. Therefore, the first PCa of the present invention
According to the member and the second PCa member, it is possible to simplify a vertical joint work at a building site and obtain a concrete structure having a high vertical joint strength regardless of the skill level of a worker and a building constructed therefrom. it can.

A particularly preferred second PCa member of the present invention has an auxiliary metal fitting disposed along a wall surface in the joint groove, and a part of the auxiliary metal fitting is formed in the opening of the joint groove. It is a precast concrete member arranged so as to protrude outward.
According to the second PCa member of this aspect having the auxiliary metal fittings, the shear strength of the joint groove is improved particularly at the periphery of the opening, and as a result, the vertical joint formed between the first PCa member and the present invention is improved. The occurrence of cracks and breaks near the joint groove in the portion can be suppressed at a high level. Therefore,
The present invention provides, as a more preferable concrete structure, a joint groove in which the second PCa member having the auxiliary metal fittings and the first PCa member of the present invention have the arc-shaped exposed portion of the rebar arranged with the auxiliary metal fittings. And a filler material is filled between the vertical mating surfaces including the joint groove to provide a concrete structure which is vertically joined to each other. In the concrete structure according to the present aspect, the occurrence of cracks and breaks near the joint groove in the vertical joint portion can be suppressed at a high level.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial plan view of the concrete structure 1 according to the present embodiment, and FIG. 2 is a partial front view of the concrete structure 1. FIG. 3 is a perspective view schematically showing a first PCa member 10 (hereinafter abbreviated as “first PCa plate 10”) of the present invention constituting the concrete structure 1 in the present embodiment. 4 is a front view schematically showing the vertical mating surface 10a of the first PCa plate 10. FIG. 5 shows the second PCa of the present invention constituting the present concrete structure 1 in the present embodiment.
FIG. 6 is a perspective view schematically showing a member 20 (hereinafter abbreviated as “second PCa plate 20”), and FIG.
It is a front view which shows the 0 perpendicular | vertical joining surface 20a typically.

A concrete structure 1 according to the present embodiment.
Is a structure constituting a wall of a building in a wall-type precast reinforced concrete structure. That is, as shown in FIG. 1, the concrete structure 1 has a first PCa plate 10 and a second PCa plate 20, which are precast reinforced concrete plates pre-formed into a predetermined wall plate shape, joined to each other. It is constituted by being done. The present invention is characterized by the structure of a vertical joint (vertical joint) described later, and the first PCa plate 10
And methods for manufacturing the second PCa plate 20 and the materials used (various materials used for producing concrete, types of reinforcing bars to be embedded, or concrete member molding methods,
) Itself is a well-known method and material in the field similar to the case of manufacturing a conventional general precast concrete member (for example, “Architectural Construction Standard Specifications / Commentary JASS10 Precast Concrete” edited and published by the Architectural Institute of Japan). Construction (refer to Maruzen Co., Ltd.) may be applied, and the detailed description is omitted because it does not particularly characterize the present invention.

First, the shape of the first PCa plate 10 will be described. As shown in FIGS. 3 and 4, the first PCa plate 10 according to the present embodiment has a wall plate shape of a predetermined size (for example, a length of 4000 mm and a height of 25 mm in the present embodiment).
It is a precast reinforced concrete plate molded into a rectangular plate having a size of 00 mm and a width of 150 mm. Thus, as shown in FIGS. 3 and 4, the vertical mating surface 10a of the first PCa plate 10 has irregularities. That is, as shown in FIGS. 3 and 4, a dent (hereinafter, referred to as “first cotter forming portion 10 b”) extends from the upper end to the lower end in the vertical direction near the center of the flat vertical mating surface 10 a. In this embodiment, a total of six recesses (hereinafter, referred to as “second cotter forming portions 10c”) are formed partially and at substantially equal intervals (refer to FIG. 4). Although not particularly limited, in the present embodiment, the width of the first cotter forming portion 10b is approximately 35 mm to 40 m with respect to the first PCa plate 10 having the above-described size.
m, the depth is approximately 7 mm, and the width of the second cotter forming portion 10 c is approximately 80 mm to 90 m.
m and a depth of about 12 mm. In addition, the major axis of the second cotter forming portion 10c is approximately 200 mm.
A total of six second cotter forming portions 10c are formed at approximately 200 mm intervals. Accordingly, the major axis of the first cotter forming portion 10b at the upper end and the lower end is approximately 150 m.
m (see FIG. 4). As shown in FIG. 3, the bottoms of these cotter forming portions 10b and 10c are flat, and the surrounding wall surface is formed with a slight taper toward the bottom.

The first and second cotter forming sections 10
As a result of providing the b and 10c on the vertical mating surface 10a, the transmission of shear force is improved in combination with the cotter forming portions 20b and 20c provided on the vertical mating surface 20a of the second PCa plate 20, which will be described later. High shear strength in the part can be realized.

As shown in FIGS. 3 and 4, a joining reinforcing bar (joining bar) 8 that forms an arch shape in the vertical direction is provided at the center of each second cotter forming portion 10c.
That is, the reinforcing bar 8 for joining is typically a steel material formed by bending a steel bar for reinforced concrete (SR235, SD295A, etc.) into a substantially U-shape or a U-shape. As shown in FIG. 8 which is a cross-sectional view taken along the line VIII, both ends of the first PCa
The portion that is embedded and bent in the plate 10 is disposed so as to be exposed from the second cotter forming portion 10c of the vertical mating surface 10a and form an arch shape in the vertical direction. Although not particularly limited, as shown in FIG. 8, the joining reinforcing bar 8 is formed such that the ratio between the portion embedded in the first PCa plate 10 and the exposed portion is about 4: 1 to 5: 1. It is preferable to mold and dispose. Thereby, the tensile strength of the reinforcing bar 8 for joining can be increased. In the present embodiment, the first P of the above-described size is used.
The joining reinforcing bar 8 having a diameter of 9 mm is used for the Ca plate 10, and the length of the portion embedded in the first PCa plate 10 (so-called concrete fixing length) is approximately 400 mm, and the arched exposed portion of the reinforcing bar 8 is provided. The joining reinforcing bars 8 are molded and arranged so that the height from the bottom surface of the second cotter forming portion 10c is approximately 80 mm to 90 mm, and a plurality of (in this case, a total of six) reinforcing bars 8 are arranged in the vertical direction.

Next, the shape of the second PCa plate 20 will be described. As shown in FIGS. 5 and 6, the second PCa plate 20 according to the present embodiment has a wall plate shape of a predetermined size (for example, in the present embodiment, the length is 4000 mm, similar to the first PCa plate 10, 2500mm height, 150mm width
This is a precast reinforced concrete plate molded into a rectangular plate of the size shown in FIG. Thus, as shown in FIGS. 5 and 6, irregularities are formed on the vertical mating surface 20a of the second PCa plate 20. That is, as shown in FIG. 5 and FIG. 6, a dent having a predetermined depth (hereinafter, referred to as a “first cotter forming portion 20b”) is provided near the center of the flat vertical mating surface 20a in the vertical direction. In the present embodiment, a total of six recesses (hereinafter, referred to as “second cotter forming portions 20c”) are formed from the upper portion to the lower end portion and further have a wide shape with partial and substantially equal intervals. (See FIG. 6). The first cotter forming section 20b and the second cotter forming section 20b
The position, size, number, and the like where c is formed substantially correspond to the first cotter forming portion 10b and the second cotter forming portion 10c in the first PCa plate 10. Therefore, although not limited to this, in the present embodiment, the width of the first cotter forming portion 20b is approximately 35 mm to 40 m with respect to the second PCa plate 20 having the above-described size.
m, the depth is approximately 7 mm, and the width of the second cotter forming portion 20 c is approximately 80 mm to 90 m.
m and a depth of approximately 7 mm. Further, as shown in FIG. 5, these cotter forming portions 20b,
The bottom of 20c is flat, and the wall surface around it is formed with a slight taper toward the bottom. Thus, as described above, as a result of providing the first and second cotter forming portions 20b and 20c on the vertical mating surface 10a, the first and second cotter forming portions 20b and 20c are formed on the vertical mating surface 10a of the first PCa plate 10. Cotter forming parts 10b, 10c
In addition, the transmission of the shear force is improved, and a high shear strength at the joint can be realized.

As shown in FIGS. 5 and 6, the second PCa
A joint groove 21 according to the present embodiment is formed in a central portion of each second cotter forming portion 10c of the plate 20 so that a part of the reinforcing steel bar 8 can be inserted. As shown in FIGS. 5 and 6, the joint groove 21 is provided in the second PCa plate 20.
Is provided so as to penetrate from the upper surface to the lower surface.
Further, as shown in FIGS. 5 and 1, when viewed from above the second PCa plate 20, the joint groove 21 has a vertical mating surface with a slightly cut end on the pointed side of the egg. The gap portion in the joint groove 21 is formed so as to gradually expand than the opening width at 20a. Although not particularly limited,
In the present embodiment, the second PCa plate 2 having the above-described size is used.
0 and the joint reinforcing bar 8, the opening width of the joint groove 21 is approximately 18 mm to 20 mm, and the depth of the groove is approximately 45 m.
m to 50 mm, and the maximum width of the gap in the groove is approximately 40 mm.

As shown in FIG. 5, in the second PCa plate 20 according to the present embodiment, the auxiliary metal fittings 6 are arranged along the wall surface in the joint groove 21. That is, this auxiliary metal fitting 6 is formed by bending a structural steel material (plate) into an inverted egg-shaped U-shape so as to correspond to the shape of the joint groove 21, and as shown in FIGS. The end 6a is bent and doubled. Thereby, the strength of the end 6a is improved. Thus,
As shown in FIG. 1 and FIG. 5, the auxiliary metal fitting 6 is arranged in a state where the double end 6 a protrudes outward from the opening of the joint groove 21. Thereby, reinforcement of the vicinity of the joint groove 21 in the second PCa plate 20 according to the present embodiment, particularly, the periphery of the opening is realized.

Next, the first PCa plate 10 and the second PCa
The configuration of the concrete structure 1 according to the present embodiment, which is formed by vertically joining the a-plate 20 directly, will be described. The concrete structure 1 is typically assembled in accordance with a wall-type precast method at a construction site. The assembling work procedure and equipment to be used (such as an oblique support for assembling and a lifting crane) are conventional wall-type. It is the same as the precast method. Hereinafter, the concrete structure 1
Will be described in detail.

As shown in FIG. 1, the first PCa plate 10
And the second PCa plate 20 have their vertical mating surfaces 10a, 2
0a are arranged adjacent to each other so as to face each other. Although not particularly limited, in the present embodiment, the vertical mating surface 10 of the two PCa plates 10 and 20 having the above-described size is used.
a and 20a are arranged so that the distance between them is approximately 10 mm to 20 mm (preferably 15 mm). As a result of this arrangement, as described above, in the present embodiment, the first cotter forming section 10b and the second cotter forming section 10c in the first PCa board 10 are connected to the first cotter forming section 20b and the second cotter forming section 20b in the second PCa board 20. It looks like facing the 2 cotter forming section 20c. For this reason, in FIG.
7 and 2 which are sectional views taken along line VII-VII.
As shown in FIG. 9, which is a cross-sectional view taken along line IX-IX of FIG.
Are provided so that they can sufficiently mesh with each other, and as a result, a so-called shark cotter capable of realizing efficient transmission of the shearing force is formed. As a result of the above arrangement, as shown in FIG. 8 and FIGS. 10 and 9, which are partially enlarged views thereof, the arch-shaped exposure of a total of six joining reinforcing bars 8 in the first PCa plate 10 is performed. The part is the second PCa board 20
Is inserted into the joint groove 21 at the point.

Hereinafter, the joining method according to this embodiment will be described. As shown in FIG. 1, the concrete structure 1 according to the present embodiment has a structure similar to a general wet joint.
It is joined by filling the filler 5 between the vertical mating surfaces 10a and 20a. That is, as shown in FIG. 1, the filler 5 is inserted from the upper opening into the gap between the joining surfaces 10 a and 20 a between the adjacent first PCa plate 10 and second PCa plate 20 (that is, the vertical joint 2). , And the gap and the inside of the joint groove 21 into which a part of the reinforcing steel bar 8 is inserted are densely filled with the filler 5. In addition, the filler 5
Various types of fillers such as concrete and mortar having a design reference strength (Fc) of 210 kgf / cm ² or more are known, but the filler 5 used in the present embodiment is 6
A grout material (typically a grout material prepared based on a synthetic resin such as a melamine resin) having a design reference strength of 00 kgf / cm ² or more. Thereby, the joining strength of the vertical joint can be improved. As shown in FIG. 1, a pole-shaped backup material 4 typically made of polyurethane foam or polyethylene foam is inserted into the gap between the vertical joints 2 and a grout material is injected into the vertical joint 2. Further, a sealing material 3 (typically, a urethane-based sealing material) is filled for waterproofing the vertical joint portion 2.

In the concrete structure 1 according to the present embodiment, which is vertically joined as described above, FIG. 9 and FIG.
0, the vertical mating surface 10a of the first PCa plate 10
The arch-shaped exposed portions of the joining reinforcing bars 8 arranged in the above manner are embedded in the cured filler 5 while being inserted into the joint grooves. As a result, in the concrete structure 1 of the present invention, the shear strength of the vertical joint, which cannot be obtained with a concrete structure obtained by vertically joining conventional precast concrete members to each other, can be complicated welding or mechanical joint. This is realized without performing any processing.

That is, in the concrete structure 1,
Each of the PCa members 1 constituting the concrete structure 1 is formed by forming the exposed portion of the joining reinforcing bar 8 into an arch shape (typically a U-shaped or U-shaped arc shape) in the vertical direction.
A load-bearing performance capable of suppressing the separation of 0 and 20 to a high level is provided. Further, in the concrete structure 1, the joint groove 21 is formed such that the gap in the groove is wider than the opening width. By forming the entrance narrow and the internal space wide in this way, the degree of restraint of the filler 5 filled in the joint groove 21 and the reinforcing steel bar 8 embedded in the joint groove 21 with respect to the vertical joint portion 2 can be enhanced. . As a result, the strength of the concrete structure 1 against the shearing force applied horizontally (perpendicular to the vertical mating surfaces 10a and 20a) is improved, and each PCa member 1 constituting the concrete structure 1 is improved.
A load-bearing performance capable of suppressing the separation of 0 and 20 to a high level is provided. In the concrete structure 1, the auxiliary fitting 6 is provided along the inner wall surface of the joint groove 21 with the end 6 a protruding. Thereby, the vicinity of the joint groove 21 (particularly, the periphery of the opening) is reinforced, and the occurrence of cracks and breaks can be suppressed at a high level.

As described above, according to the concrete structure of the present invention and the first PCa member and the second PCa member constituting the same, the vertical joint work at the construction site can be simplified and the degree of skill of the worker can be improved. Regardless of the above, a concrete building having a stable vertical joint strength can be obtained. For example, by applying the present invention to a wall type precast method, a concrete structure 30 as shown in FIG.
(One component of the building) is obtained. In this figure, reference numerals 31, 33, 35, 37, 39, 41, 43, 45
The precast concrete member marked with “” corresponds to the first PCa member (here, a wall material) of the present invention assembled to obtain the present concrete structure 30.
4,36,38,40,42,44,46,47,48
The precast concrete member marked with corresponds to the second PCa member (here, wall material) of the present invention assembled to obtain the present concrete structure 30. Although not shown, these members are provided with openings for providing predetermined doors and windows in advance.

As shown in FIG. 12, which is an enlarged view of the portion XII in FIG. 11, the first PCa members 31, 45, 43 constituting the concrete structure 30 are directly joined to each other. As in the above-described embodiment, a cotter forming portion (not shown) and connecting reinforcing bars 50a, 50b, 50c having an arch-shaped exposed portion are provided. On the other hand, on the vertical mating surface of each corresponding second PCa member 44,
A cotter forming portion (not shown) and joint grooves 44a, 44b, and 44c are provided in the same manner as in the above embodiment, and the auxiliary fitting 5 is provided in the groove as in the above embodiment.
1 is arranged. Thus, using the same filler as shown in the above-described embodiment, these members 31 and 3 are used.
3,35,37,39,41,43,45,32,3
4,36,38,40,42,44,46,47,48
Are joined directly to each other. In the present invention, since a complicated and troublesome work such as conventional welding or mechanical joint is not required for joining, for example, as shown in FIG. 12, PCa members 44, 31, and 4
Even when the 3 and 45 are vertically joined to each other, it is not necessary to provide a vertical joint at the intersection (the center of the member 44 in FIG. 12) which is most susceptible to the shearing force. Only by filling the filler, the PCa member 44,
Because it is possible to perform the vertical joining of the joints 31, 43 and 45, it is not necessary to centralize the vertical joining portions (see FIG. 14) from the viewpoint of working efficiency as in the case of welding or mechanical coupling means. is there.

In practicing the present invention, it is not necessary to limit the portions of the first PCa member and / or the second PCa member of the present invention that form the vertical mating surface to both end surfaces of the rectangular plate-shaped member. For example, as shown in FIG. 13 which is an enlarged view of the XIII portion in FIG. 11, a part of the decorative surface of the rectangular plate-shaped PCa member 45 (here, the first PCa member) is directly joined to a part of the decorative surface and similar to the above. A cotter forming part may be formed. In that case, as shown in FIG. 13, the joining reinforcing bars 53a and 53b are embedded in the PCa member 45 while being bent in a predetermined direction. Accordingly, the same cotter forming portion (not shown) and the arched exposed portion as in the above-described embodiment are formed on the both end surfaces and the four decorative surfaces of one first PCa member 45, and the joining rebar 50b, 50d. , 53a, 53b are provided. On the other hand, each second PCa member 4 arranged corresponding to these
In the vertical mating surfaces at the end faces of the 4, 46, 47, and 48, a cotter forming portion (not shown) and joint grooves 44b, 46a, 47a, and 48a are provided as in the above-described embodiment. An auxiliary metal fitting 51 is disposed in the same manner as in the above-described embodiment. Thus, these are vertically joined to each other by using the same filler as shown in the above embodiment. As described above, according to the present invention, PCa members having various shapes can be easily and vertically joined to each other. In the above-described embodiment, the first PCa member and the second PCa member of the present invention are prepared as separate and independent members. However, the present invention is not limited to this. For example, a precast concrete member prepared as a wall material having two vertical mating surfaces, wherein one of the vertical mating surfaces is the first PC
formed in the same manner as the vertical mating surface 10a of the a plate 10,
A precast concrete member having the other vertical mating surface formed in the same manner as the vertical mating surface 20a of the second PCa plate 20 is also a first PCa member of the present invention and a second Pa member of the present invention.
Preferred as a Ca member. A hybrid structure in which the first PCa member of the present invention and the second PCa member of the present invention are vertically joined to each other can also suitably constitute the concrete structure of the present invention.

[0026]

According to the present invention, a precast concrete member which simplifies a vertical joint work at a construction site and has a stable vertical joint strength irrespective of a worker's skill level, and a concrete structure comprising such a member. A body and a building are provided.

That is, according to the first PCa member and the second PCa member of the present invention, the concrete structure of the present invention which can always realize a stable joining strength without being affected by the skill of the operator. Obtainable. Further, according to the concrete structure of the present invention, it is possible to simplify a vertical joint work at a building site and to construct a concrete building having a high vertical joint strength regardless of the skill level of an operator.

[Brief description of the drawings]

FIG. 1 is a plan view showing the vicinity of a vertical joint portion of a concrete structure according to an embodiment of the present invention.

FIG. 2 is a front view showing the vicinity of a vertical joint of a concrete structure according to an embodiment of the present invention.

FIG. 3 is a perspective view showing the vicinity of a vertical mating surface of a first PCa member of the present invention according to one embodiment.

FIG. 4 is a front view showing a vertical mating surface of a first PCa member of the present invention according to one embodiment.

FIG. 5 is a perspective view showing the vicinity of a vertical mating surface of a second PCa member of the present invention according to one embodiment.

FIG. 6 is a front view showing a vertical mating surface of a second PCa member of the present invention according to one embodiment.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a partially enlarged view of FIG. 8;

FIG. 11 is an assembly view schematically showing a concrete structure of the present invention according to one embodiment.

FIG. 12 is an enlarged view showing a portion XII in FIG. 11 in detail.

FIG. 13 is an enlarged view showing a portion XIII in FIG. 11 in detail.

FIG. 14 is an explanatory view showing an example of a conventional vertical joint portion.

[Explanation of symbols]

1,30 Concrete structure 2 Vertical joint 5,100 Filler 6,51 Auxiliary fittings 8,50a, 50b, 50c, 50d, 53a, 53
b, 101a, 101b, 102a, 102b, 103
a, 103b Reinforcing bar 10 First PCa member (first PCa plate) 20 Second PCa member (second PCa plate) 10a, 20a Vertical mating surface 10b, 20b First cotter forming portion 10c, 20c Second cotter forming portion 21, 44a, 44b, 44c, 46a, 47a, 48
a Joint groove 101,102,103 Precast concrete member

Claims (5)

[Claims] 1. A precast concrete member having a vertical mating surface joined vertically when assembled at a building site, wherein a part of a reinforcing bar embedded in the concrete member is exposed at the vertical mating surface. Here, a part of the rebar is bent and exposed to form an arch shape in the vertical direction, and a plurality of the arch-shaped exposed portions are arranged in the vertical direction on the vertical mating surface. Precast concrete members. 2. A precast concrete member having a vertical mating surface joined vertically in assembling at a building site, wherein the vertical mating surface is joined to the precast concrete member according to claim 1. A vertically extending joint groove into which the arch-shaped exposed portion of the reinforcing bar can be inserted, wherein the joint groove is formed such that a gap in the groove is wider than an opening width of the groove. Precast concrete members. 3. An auxiliary metal fitting is arranged along a wall surface in the joint groove, wherein a part of the auxiliary metal fitting is arranged so as to protrude outward from an opening of the joint groove. The precast concrete member according to claim 2. 4. The following two precast concrete members: (a). A precast concrete member having a vertical mating surface joined vertically when assembled at a building site, wherein a part of a reinforcing bar embedded in the concrete member is exposed at the vertical mating surface. A precast concrete member in which a part of the reinforcing bar is bent and exposed so as to form an arch shape in a vertical direction, and a plurality of the arch-shaped exposed portions are vertically arranged on the vertical mating surface; ). A precast concrete member having a vertical mating surface that is vertically joined when assembled at a building site, and the vertical mating surface includes an arch of the reinforcing bar when joined with the precast concrete member according to (a). A pre-cast concrete member, in which a joint groove in which the exposed portion can be inserted is provided in the vertical direction, wherein the joint groove is formed such that a gap in the groove is wider than an opening width of the groove; Are vertically joined to each other by inserting an arch-shaped exposed portion of the reinforcing bar into the joint groove and filling a filler between the vertical mating surfaces including the inside of the joint groove. 5. The following two precast concrete members: (a). A precast concrete member having a vertical mating surface joined vertically when assembled at a building site, wherein a part of a reinforcing bar embedded in the concrete member is exposed at the vertical mating surface. A precast concrete member in which a part of the reinforcing bar is bent and exposed so as to form an arch shape in a vertical direction, and a plurality of the arch-shaped exposed portions are vertically arranged on the vertical mating surface; ). A precast concrete member having a vertical mating surface that is vertically joined when assembled at a building site, and the vertical mating surface includes an arch of the reinforcing bar when joined with the precast concrete member according to (a). A joint groove into which the exposed portion can be inserted is provided in the vertical direction. Here, the joint groove is formed such that a gap in the groove is wider than an opening width of the groove. An auxiliary metal fitting is disposed along the wall surface of the precast concrete member, and a part of the auxiliary metal fitting is disposed so as to protrude outward from an opening of the joint groove; By inserting a filler into the joint groove and filling the space between the vertical mating surfaces including the inside of the joint groove, Concrete structure configured is.