JP3362129B2 - Assembling method and structure of connection part - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a structure for assembling a joint portion such as a joint portion between a precast concrete column and a precast concrete beam or a joint portion between a large beam and a small beam.

[0002]

2. Description of the Related Art In the case of assembling a precast concrete column and a precast concrete beam, it has hitherto been necessary to use a structure shown in FIG.
~ There was a technique as shown in FIG. In FIG. 10, a concrete jaw 80 is projected on the concrete column 10, the beam 20 is placed on the jaw 80, and the mortar 4 is attached to the joint.
0, and then the columns 10 and the beams 20 are sheathed 11 and 21.
It is a technique of tensioning and joining with a PC tension material. It takes time and effort to place the level adjusting material 81 on the chin 80 to adjust the height of the beam and to position the beam on the left and right. Figure 11 is beam 2
No. 0 is provided with a notch so that the jaw 82 is combined with this notch so that the jaw 82 cannot be seen after assembly. In this case, it is not easy to adjust and align the level adjusting material 83 as compared with the structure of FIG.
Construction of 0 is even more troublesome.

In the technique shown in FIG. 12, the L-shaped fittings 84 and 85 provided on the column 10 and the beam 20 are joined by bolts 86 to temporarily fix the beam, and the joint concrete 40 is placed.
This is a technique in which the pillar 10 and the beam 20 are tightly connected with a PC tension member. Since the connection is performed in a narrow joint, there is a problem in workability and a large amount of joint concrete. Further, as shown in FIG. 13, a metal bracket 87 for receiving the beam 20 is provided on the column 10, the beam 20 is placed on the bracket 87, mortar is placed in the joints, and then the column and the beam are connected to the PC.
It is a technique of tensioning and joining with a tension material. In this case, the metal bracket 87 can be removed after the pillar 10 and the beam 20 are tensioned, which is preferable in terms of appearance, but it takes a lot of time and effort for curing the removal mark and the removal mark.

[0004]

In the conventional assembling of a precast concrete column and a precast concrete beam, it takes a lot of time to align the center of the beam and to place the joint mortar or concrete at the time of assembling, and it takes a long time for the assembling work. . In addition, there are many joints, and there are problems with aesthetics such as concrete jaws remaining. The present invention solves such problems and provides a method for assembling a precast concrete column and a precast concrete beam joint part, or a girder and beam girder joint part. An object of the present invention is to provide a joint portion structure which can reduce working time, has a clean joint portion and is excellent in aesthetics.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a concave portion into which a supporting key for supporting a second member is inserted and locked is provided on a joint surface of a first member made of precast concrete, and a small edge of the second member is provided. A support key that projects from the surface and supports the own weight of the second member is built in the second member, the second member is positioned at the joint, and the support key is projected to enter the recess. To stop the second member to be supported by the first member,
A method for assembling a joint part, wherein the first member and the second member are tensioned and coupled by a tension member. When inserting mortar into the joints of the joints, it is no different from ordinary construction that the non-shrink mortar is cast in the joints, and after the mortar is hardened, the PC joints are tension-bonded. The joint may be adhered with an adhesive without interposing mortar.

The present invention is a method for assembling a precast concrete column and a precast concrete beam, or a joint portion of a girder and a girder. For example, in the example in which the first member is a pillar and the second member is a beam, the support key has a tip portion protruding from the fore end of the beam to enter and lock into a recess in the column, and the weight of the beam itself. The base remains in the beam so that the beam can be supported, and it has a function of aligning the positional relationship between the column and the beam to the regular position and supporting the beam at the regular position during the erection period of the beam. . The concave part provided on the joint surface of the pillar also has a guide part for guiding the support key, and a locking part for tightly locking the support key, and functions to firmly temporarily support and support the beam at the regular position. Be prepared.

In the case of a combination of a column and a beam, for example, the joint portion joint structure for carrying out the method of the present invention is a precast concrete provided with a concave portion on the joint surface into which a supporting key for supporting the beam enters and locks. A precast concrete beam that includes a column and a box that accommodates a support key that supports the weight of the beam so that the support key can project from the forehead, and that has means for internally holding the support key in the box and means for projecting from the forehead. And a joint portion structure of a joint portion. In addition, in the joint part of the girder and the girder, a girder with a concave part where the support key supporting the girder enters and locks on the joint surface, and a support key supporting the weight of the girder can be projected from the gutter surface The structure of the joint portion is characterized by comprising a box housed in the box, and a combination with a beam having means for holding and holding the support key in the box and means for projecting from the edge surface. In this case, the member in which the support key is first incorporated may be a girder. That is, it is provided with a beam which has a concave portion into which a supporting key enters and locks, and a box which accommodates a supporting key that supports the weight of the beam so that the supporting key can project from the joint surface. The structure of the connection part may be characterized by comprising a combination with a girder having a means for holding it inside and a means for projecting it from the connection surface. In these structures, if the means for projecting the support key is spring urging means provided at the back of the box, the work is simple and preferable.

According to the present invention, since the support key automatically guides the position of the joint portion and the center to the proper position, it is easy to align the joint portion and to reliably support the beam. It does not need to have a chin on the pillar, and there is no protrusion such as a chin or bracket on the joint part, and the appearance of the joint part is excellent.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A method and structure for assembling a joint according to the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment, and FIG. 1 shows the precast concrete beam 20 through the support key 31 by inserting and locking the tip of the support key 31 into the recess 12 provided in the precast concrete column 10. It shows the state in which the joint mortar 40 is installed by being supported by. The support key 31 protrudes from a small surface of the beam 20 from a box 30 provided inside, and enters and locks in the recess 12 of the column. The tail end of the support key 31 is pushed by a spring 32 in the back of the box 30. The support key 31 and the box 30 are fitted with each other with a minute gap, and the support key 31 is formed in a structure capable of sufficiently supporting the weight of the beam. The support key 31 has a length of 150, for example.
~ 200 mm, width 100-150 mm, thickness 20-40
A plate body made of steel having a size of about mm may be used. Box 30 is
The depth depth is deeper than the support key 31 by about 20 to 40 mm, and the inner height and the inner width may be an inner dimension larger than the width and thickness of the support key 31 by 1 to 2 mm.

FIG. 2 is a view taken along the line AA of FIG.
The connection surface of the pillar 10 is shown. The recess 12 is provided inside the concrete from the surface of the joint, and the left and right side plates 13 and the bottom plate 1 are provided.
4, a locking portion 15 is formed by which the support key 31 is inserted and locked. The locking portion 15 is formed such that the width thereof fits with the width of the support key 31 with a slight clearance. Depth of depth is, for example, 30 to 50 mm
It should be about. The bottom plate 14 has a size structure capable of supporting the support key 31 and sufficiently supporting the weight of the beam 20. A guide portion 16 having a tapered side surface is formed above the locking portion 15. Support key 3
1 is guided by the guide portion 16 and easily enters and locks in the locking portion 15. Since the width of the locking portion 15 and the width of the support key 31 are fitted with each other with a slight gap, the beam will not be twisted. In addition, the profile of the beam 20 and the sheath 11 are shown in FIG.

FIG. 3 shows a step of aligning the column 10 and the beam 20, and shows the state immediately before the support key 31 and the recess 12 face each other when the beam 20 is lowered to the column-beam coupling position from above. Shows. The support key 31 is housed in the box 30 and does not protrude from the foremost surface 23. Support key 3
No. 1 is inserted into the box with the spring 32 inserted into the box 30 compressed at its tail end.
It is fixed in the box 30 by a rod-shaped stopper 33 inserted through the concrete from the top of the box. When the beam 20 is further lowered, the support key 31 reaches the position facing the recess 12 of the column 10. When this position is confirmed and the stopper 33 is pulled up, the support key 31 is pushed out by the spring 32 and protrudes from the forehead surface 23,
Enter the second guide portion 16. When the beam 20 is further lowered, the support key 31 is locked to the locking portion 15 of the recess 12 of the column 10, is accurately assembled in the column beam assembly position, and the beam 20 is supported by the column 10, as shown in FIG. It becomes the state shown. If the stopper 33 is dropped in this state, the stopper 33 acts as a stopper that prevents the support key 31 from returning. In this state, the alignment of the pillar 10 and the beam 20 is completed, and the alignment of the sheaths 11 and 21 is also completed accurately. That is, the installation of the beam 20 at the site is performed by the pillar 10
It is necessary to adjust only the joint width between the beam and the beam 20,
Centering work is significantly reduced. After this, non-shrink mortar 40 is placed on the joints. In addition, the non-shrink mortar is filled from the grout hole 35 into the space at the back of the box 30. After this, the PC steel material is inserted into the sheaths 11 and 21 to tension the column beams integrally.

Although FIGS. 1 to 3 show the case where the number of the supporting keys 31 is one, the present invention is not limited to this, and a plurality of supporting keys 31 may be used. For example, when there is a sheath at the center of the beam. It is recommended to install them separately on the left and right.

Next, an example in which the joint portion structure of the present invention is applied to a connecting portion of a large beam and a small beam will be described with reference to FIGS.
FIG. 4 shows a state in which the beam 60 is joined to the joint portion on the side surface of the girder 50, and the box 3 similar to FIG.
0, the support key 31 is housed therein, and the support key 31 is projected to enter and lock into the recess 12 provided in the girder 50. FIG. 5 is a view on arrow B-B in FIG. 4. In FIG. 6, a box 30 is provided on the side of the girder 50, a support key 31 is built therein, and a recess 12 is provided on the side of the girder 60.
Is an example in which is provided. A view taken along the line CC of FIG. 6 is shown in FIG. The shape of the recess provided in the beam 60 is upside down from that of FIG. This is because the bearing direction is reversed.
FIG. 8 shows a state in which the cantilever 70 is attached to the joint of the pillar 10. FIG. 9 is a view on arrow D-D of FIG. 8. The shapes and structures of the box 30, the support key 31, and the recess 12 are the same as in FIG. In this case, do not insert the mortar on the joint surface,
Sometimes glued together. Further, both ends of the PC steel material 71 are fixed to the opposite surface of the pillar 10 and the tip portion of the cantilever 70 by the fixing portion 72.
Is installed and fixed to bear the bending moment of the cantilever. In addition, the cantilever 70 with the insert 73 and the bolt 74.
Is to be positioned.

[0014]

According to the present invention, when assembling the joint portion,
The box provided on the end surface of the beam and the bracket of the pillar are aligned by a predetermined joint width, and the supporting key is projected and fitted into the bracket, which simplifies the troublesome centering work. In addition, the joint structure is very simple, and it does not take much time to place the mortar, and the working time is greatly reduced. In addition, the joints are clean, and there is no sense of incongruity in terms of design, which is excellent in aesthetics.

[Brief description of drawings]

FIG. 1 is a side elevational sectional view of an example.

FIG. 2 is a front view of the pillar of the embodiment (a view taken along the line AA of FIG. 1).

FIG. 3 is an explanatory diagram showing a work process of the embodiment.

FIG. 4 is a connection portion of the girder and the girder of the embodiment.

5 is a view taken along the line BB of FIG.

FIG. 6 is a connection portion of a girder and a girder of the embodiment.

FIG. 7 is a view taken along the line CC of FIG.

FIG. 8 is a joint portion of a cantilever beam and a pillar according to the embodiment.

9 is a view on arrow D-D of FIG. 8. FIG.

FIG. 10 is an explanatory diagram of a conventional technique.

FIG. 11 is an explanatory diagram of a conventional technique.

FIG. 12 is an explanatory diagram of a conventional technique.

FIG. 13 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

10 pillars 11 sheath 12 recess 13 Side plate 14 Bottom plate 15 Locking part 16 Information Department 20 beams 21 sheath 23 small lots 24 Top 30 boxes 31 Support key 32 spring 33 Stopper 34 Mortar injection part 35 Mortar injection hole 40 joint mortar 50 large beams 60 beam 70 cantilever 71 PC steel 72 fixing unit 73 inserts 74 volts 80, 82 jaw 81,83 Level adjustment material 84, 85 L type mounting hardware 86 bolts 87 Metal bracket

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-6-173339 (JP, A) JP-A-11-172762 (JP, A) JP-A-3-257234 (JP, A) JP-A-10- 252222 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E04B 1/41 502 E04B 1/18 E04B 1/58 504 E04B 1/58 506 E04B 1/58 508 E04B 1/22

Claims (5)

(57) [Claims] 1. A precast concrete first member is provided with a recessed portion into which a support key for supporting a second member is inserted and locked in a joint surface of the first member, and a second portion is projected from a foremost surface of the second member.
A support key for supporting the self-weight of the second member is built in the second member, the second member is positioned at the joint portion, the support key is projected, and the second key is inserted into and locked in the recess. A method of assembling a joint part, comprising supporting a member on a first member and tensioning and connecting the first member and the second member with a PC tension member. 2. A precast concrete pillar having a concave portion on a joint surface for supporting and supporting a beam for supporting a beam, and a box in which a supporting key for supporting the weight of the beam is housed so as to project from a small surface. A structure of a joint portion, characterized in that the structure comprises a combination with a precast concrete beam having a means for holding the support key in the box and a means for projecting it from the edge. 3. A large beam having a concave portion on a joint surface, into which a supporting key for supporting the beam is inserted and locked, and a box for accommodating a supporting key for supporting the weight of the beam in a projectable manner from the small surface. , A structure of a joint portion, characterized in that the structure comprises a means for holding the support key inside the box and a beam having means for projecting the support key from the edge surface. 4. A girder having a recessed portion on which the support key is inserted and locked, and a box which accommodates a support key for supporting the weight of the girder so as to project from the joint surface. The structure of the joint portion, which comprises a combination of a girder having means for holding and holding the inside of the box and means for projecting from the joint surface. 5. The structure of the joint portion according to claim 2, wherein the means for projecting the support key is a spring urging means provided in the inner portion of the box.