JP2002146720A - Column and beam joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint construction between a column and a beam capable of reducing the period of time for the construction of an urban expressway. SOLUTION: In a joint construction between a column 1 and a beam 11 of a reinforced concrete bridge pier, an insertion hole 3 having projections on the inner surface is provided at the joint portion between the column 1 and the beam 11, an insertion body 15 having projections on the outer surface which can be inserted to the insertion hole 3 at the joint portion with the column 1 is provided in the beam 11, then an insertion body 15 is inserted to the insertion hole 3, and the column 1 and the beam 11 are jointed together by injecting a filler in a gap between the insertion hole 3 and the insertion body 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a pillar and a cross beam of a pier used on a highway or the like.

[0002]

2. Description of the Related Art In the construction of an urban expressway, a "T-type reinforced concrete pier" for constructing a pillar on a median strip below a highway and a "reinforced concrete pier" for constructing a pillar on a sidewalk on both sides of the road are used. Many ramen piers have been constructed. These reinforced concrete piers (hereinafter referred to as RC
FIG. 7 shows a cross-sectional structure of the pier. The RC pier 51 is shown in FIG.
As shown in FIG.
Pillar 53) and reinforced concrete cross beam 55 (hereinafter, RC)
Beam 55). And these RC pillars 5
The joining of the RC beams 55 with the RC beams 55 is performed by assembling reinforcing bars 57 vertically and horizontally and diagonally, setting a formwork, and placing concrete.

[0003]

Since the construction of an urban expressway is performed while restricting traffic on a lower road, it is desired to shorten the construction period as much as possible. However, like the conventional RC pier 51 shown in FIG.
When joining the column 53 and the RC beam 55 by complicated reinforcing arrangement and concrete casting, work such as rebar work, formwork work, and shoring work is required, and there is a problem that the construction period is prolonged. is there.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a joint structure between a column and a beam, which can shorten the construction period of an urban expressway.

[0005]

According to the joint structure of a pillar and a beam according to the present invention, in a joint structure of a pillar and a beam of a pier, an insertion hole having a protrusion on an inner surface is provided in the pillar or the beam, and the insertion hole is inserted into the insertion hole. An insert having a protrusion on a possible outer surface is provided on a beam or a column, the insert is inserted into the insertion hole, and a filler is injected into a gap between the insertion hole and the insert to join the column and the beam. Things.

Further, a plurality of insertion holes and insertion bodies are provided.

Further, a positioning means is provided at a joint between the column and the beam.

In addition, the beam is divided into a plurality of beams.

Further, the insertion hole is constituted by a steel pipe having an inner rib, and the insert is constituted by a steel pipe having an outer rib.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is an explanatory diagram of one embodiment of the present invention. In the joint structure of RC column 1 and RC beam 11 according to the present embodiment, R
A steel pipe 3 with an inner rib is embedded at the upper end of the C column 1.
A diaphragm 5 is provided at a predetermined depth position in the steel pipe 3 with an inner rib. Further, an injection hole 7 for mortar injection penetrating through the inner surface of the steel pipe 3 with the inner surface rib is provided substantially at the same position as the diaphragm on the side wall of the RC column 1. Further, a plurality of confirmation holes 9 for confirming mortar injection are provided near the upper end of the RC column 1.

On the other hand, R
A projection 13 having the same shape as the outer shape of the C pillar 1 is formed. The convex portion 13 is provided with an outer ribbed steel pipe 15 that can be inserted into the inner ribbed steel pipe 3 provided on the RC column 1.

The RC column 1 and the RC beam 11 having the above-described configuration.
Will be described. After installing RC pillar 1,
The RC beam 11 is suspended by a crane, and the RC beam 11 is installed from above the RC column 1 such that the steel tube 15 with the external rib on the RC beam 11 side is inserted into the steel tube 3 with the internal rib provided on the RC column 1. Then, as shown in FIG. 2, the mortar is injected from the injection hole 7 after the positioning is performed so that the shape of the RC column 1 and the shape of the convex portion 13 of the RC beam 11 match. When the mortar overflows from the confirmation hole 9, the injection is stopped. At this time, the injected mortar is blocked by the diaphragm 5 and does not fall to the lower part of the steel pipe 3 with the inner surface rib. After the mortar injection is completed, the mortar hardens,
The C beam 11 and the RC column 1 are firmly joined via a mortar.

In the present embodiment configured as described above, the inertial force acting on the RC beam 11 during an earthquake is transmitted to the outer ribbed steel pipe 15, and the inner ribbed steel pipe is attached by the adhesive force between the rib and the mortar. 3 to the RC column 1.

As described above, according to the present embodiment, it is possible to reduce the work such as complicated rebar work, formwork work, and support work, and the RC column 1 and the RC beam 1 in a very short period of time.
1 can be joined.

In the construction of this type of pier, R
Since the girder is installed on the C beam 11, the height accuracy of the RC beam 11 at the ceiling is required. In this regard, according to the joint structure of the present invention, the height of the RC beam 11 can be finely adjusted by inserting a spacer between the upper surface of the RC column 1 and the convex portion 13 of the RC beam 11. .

Embodiment 2 FIG. 3 is an explanatory diagram of another embodiment of the present invention. In the present embodiment, a key 17 is formed at the lower end edge of the convex portion 13 of the RC beam 11, and the RC column 1
A key groove 19 into which the key 17 can be inserted is formed at the upper end edge of the key. By providing the key 17 and the key groove 19 in this manner, it is possible to easily and surely position the RC beam 11 and the RC column 1 at the time of joining.

In place of the key 17 and the key groove 19,
As shown in FIG. 4, a guide plate 21 extending downward may be provided on the convex portion 13, and a guide hole 23 into which the guide plate 21 can be inserted may be provided on the upper end of the RC column 1.

Embodiment 3 FIG. 5 is an explanatory diagram of another embodiment of the present invention. In the present embodiment, four steel pipes 3 with inner ribs are buried on the RC column 1 side, and RC beams 11
Correspondingly, four steel ribs 15 with external ribs are provided on the side. Thus, a plurality of ribbed steel pipes 3,
By joining at 15, the joining strength increases,
RC column 1 and RC beam 11 are inserted simultaneously into ribbed steel pipes
, And there is no need to provide a separate positioning means.

The plurality of ribbed steel pipes 3
In the case of joining at 15, as shown in FIG.
1 may be divided for each ribbed steel pipe 15. By dividing as described above, the weight of one piece when the RC beam 11 is suspended can be reduced.

In the above example, the ribbed steel pipes 3, 15
Although the example in which four were provided was shown, the number of ribbed steel pipes is not limited to this, and can be appropriately selected depending on the diameter of the RC column 1, the required joining strength, and the like.

The joining with the plurality of ribbed steel pipes 3 and 15 as in the third embodiment is particularly effective when the RC column section is large.

In the first to third embodiments, the so-called reinforced concrete pier, in which both the column and the beam are made of reinforced concrete, is taken as an example. However, the present invention is not limited to this. It also includes so-called composite piers that join steel beams. Further, in Embodiments 1 to 3, the example in which the insertion hole is provided on the pillar side and the insertion body is provided on the beam side has been described, but the present invention is not limited to this, and the insertion body is provided on the pillar side. And those having an insertion hole on the beam side.

Further, in the first to third embodiments, the steel pipe 3 with the inner ribs buried at the upper end of the RC column 1 is shown as the insertion hole, and the steel pipe 3 with the outer ribs provided on the projection 13 of the RC beam 11 as the insert. Although the steel pipe 15 has been described, the present invention is not limited to this, and the insertion hole may be formed of concrete, and the insert may be formed of a member having the same strength as the steel pipe.

Further, in the first to third embodiments, the example in which mortar is injected as a filler has been described. However, in addition to mortar, for example, resin may be used. In short, any material can be used as long as stress can be transmitted by the adhesive force with the ribbed steel pipe.

[0025]

As described above, according to the present invention, an insertion hole having a projection on the inner surface is provided in a column or a beam, and an insert having a projection on an outer surface insertable into the insertion hole is provided in the beam or the column. Since the insert is inserted into the insert hole and the filler is injected into the gap between the insert hole and the insert, compared with the case of a normal RC structure, a reinforcing work, a formwork, etc. The work can be reduced, and the construction period can be shortened.
As a result, traffic restrictions in urban areas can be minimized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of each component according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a state after assembly according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram of Embodiment 2 of the present invention.

FIG. 4 is an explanatory diagram of another mode according to the second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of another mode according to the third embodiment of the present invention.

FIG. 7 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Column 3 Steel pipe with internal rib 7 Injection hole 11 Beam 13 Convex part 15 Steel pipe with external rib

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D059 AA03 GG55 2E125 AA04 AA14 AA44 AB12 AC06 AC14 AG03 AG13 AG22 AG32 AG48 BA03 BB08 BB35 BC08 BC09 BD01 BE07 BF04 BF08 CA79 CA82 EA33

Claims (5)

[Claims] 1. In a joint structure of a pillar and a beam of a pier, an insertion hole having a projection on an inner surface is provided in the column or the beam, and an insert having a projection on an outer surface capable of being inserted into the insertion hole is provided in the beam or the column.
A joint structure between a column and a beam, wherein the column and the beam are joined by inserting the insert into the insert hole and injecting a filler into a gap between the insert hole and the insert. 2. The joint structure between a column and a beam according to claim 1, wherein a plurality of insertion holes and inserts are provided. 3. The joint structure between a column and a beam according to claim 1, wherein positioning means is provided at a joint between the column and the beam. 4. A joint structure between a column and a beam according to claim 2, wherein the beam is divided into a plurality of beams. 5. The joint structure between a column and a beam according to claim 1, wherein the insertion hole is formed of a steel pipe with an internal rib, and the insert is formed of a steel pipe with an external rib.