JP2009041275A - Manufacturing processes for precast concrete beam and column members and its forms - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide manufacturing processes for precast concrete beam and column members capable of placing concrete separately and neatly in a section of a boundary between a beam part and a column part in accordance with design. <P>SOLUTION: Reinforcing bars for the beam part and the column part are assembled into a form for beam 22 and a form for column 24. Partitioning plates 26 are arranged at open ends 36A, 38A of a first form for beam 32 and a second form for beam 34, respectively, to partition concrete placed spaces 36, 38 for forming the beam part and a concrete placed space 42 for forming the column part while a main reinforcing bar T1 is inserted among them. Concrete C1 for beam is placed in the concrete placed spaces 36, 38 for forming the beam part and is cured. Next, the partitioning plates 26 are removed and the form for column 24 is assembled on the open ends 36A, 38A of the first form for beam 32 and the second form for beam 34. Then, concrete C2 for column is placed in the concrete placed space 42 in the form for column 24 and is cured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a precast concrete beam column member and its formwork.

In reinforced concrete structures, high-strength concrete is used for the columns and concrete with lower strength than the columns is used for the beams in order to reduce costs while ensuring the strength of the structures.
On the other hand, in the above structure, a precast concrete beam column member in which a part of the beam and a part of the column are integrated is used, and the strength required for the beam and the column in the beam part and the column part, respectively. Depending on the situation, the concrete is divided.
JP 7-034597 A JP-A-6-299598 JP-A-6-185111 JP 5-295789

In this conventional method of concrete placement, after reinforcement for the beam and reinforcement for the column are incorporated in the formwork, the beam part is separated from the pillar part by a lath net etc., and the concrete is first placed on the beam part. After that, concrete is placed on the pillar portion.
However, since the reinforcing bars of the beam include stirrup bars in addition to the main bars, the lath net cannot be put in the narrow gap between the outside of the stirrup bars and the formwork surface, and concrete is applied to the beam part. When placing, the concrete for the beam flowed to the column part, so there was a problem that the concrete could not be placed cleanly as designed.
The inventor of the present invention has been devised in view of the above circumstances, and the object of the present invention is to design concrete placement at the boundary between the beam portion and the column portion when manufacturing the beam column member. An object of the present invention is to provide a precast concrete beam column member manufacturing method and its formwork which can be carried out neatly.

In order to achieve the above object, the present invention provides a precast concrete beam column in which a reinforced concrete column part is provided at a longitudinal end of a reinforced concrete beam part using a beam formwork and a column formwork. A method for manufacturing a member, wherein the beam formwork is configured such that a concrete placement space for forming the beam portion extends in a horizontal direction and an end portion in the extending direction becomes an open end. The pillar mold is connected to the open end portion of the beam mold to form a pillar-forming concrete placement space that communicates with the beam-forming concrete placement space. The rebar for the beam portion and the rebar for the column portion are incorporated into the beam formwork and the column formwork, and a partition plate is disposed at the open end of the beam formwork, Concrete placement space for forming the part and concrete placement for forming the column part The beam forming concrete placing space and the column forming concrete placing space are partitioned in a state in which the reinforcing bar is inserted between the space and the space for the beam forming in the concrete placing space of the beam formwork. After the concrete is cast and cured, the partition plate is removed, and is formed by the end face of the beam concrete located at the open end of the concrete casting space of the beam form and the column form. It is characterized in that concrete for pillars is placed and cured in a concrete placement space for forming pillars.
Moreover, this invention manufactures the precast concrete beam column member by which the reinforced concrete column part was provided in the intermediate part of the length direction of the reinforced concrete beam part using the beam form and the column form. In the manufacturing method, a concrete placement space for forming a beam portion of a portion of the beam portion located on one side of the column portion extends in a horizontal direction in the beam formwork and extends in the extending direction. A first formwork for a beam whose end is an open end, and a concrete placement space for forming a beam portion of the beam portion located on the other side of the column portion extend in the horizontal direction and extend A second mold frame for the beam whose end in the direction of orientation is an open end facing the open end, and the column mold is connected to the open end portion of the first mold frame for the beam and the beam A column portion connected to the open end portion of the second formwork and communicating with the concrete placement space for forming the beam portion A first concrete form for the beam, which is configured so as to form a concrete placing space for the construction, and the reinforcing bar for the beam part and the reinforcing part for the pillar part are incorporated in the beam formwork and the pillar formwork; And a partition plate disposed at the open end of the second form for the beam so that the rebar is inserted between the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion. In this state, the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion are partitioned, and the concrete placement space for the first formwork for beams and the concrete placement space for the second formwork for beams are divided. After placing and curing the beam concrete in the installation space, the partition plate is removed, the end surface of the beam concrete positioned at the open end of the concrete placement space of the first formwork for the beam, and the beam first At the open end of the concrete casting space of 2 molds And beams for concrete end surface of the location, the and Da設 pillars concrete between concrete 設空 for column portion formed to be formed in the pillar for formwork, is characterized in that so as to cure.
Further, the present invention is a formwork for manufacturing a precast concrete beam column member in which a column portion made of concrete for a column and a reinforcing bar is provided at an end portion in a length direction of the beam portion made of the concrete for a beam and the reinforcing bar. The beam formwork includes a beam formwork, a column formwork, and a partition plate. The beam formwork has a concrete placement space for forming the beam portion extending in a horizontal direction and an end portion in the extending direction being open. The column formwork is connected to the open end portion of the beam formwork and is connected to the concrete placement space for forming the beam part. The partition plate is detachably disposed at an open end of the beam formwork, and includes a concrete placement space for forming the beam portion and a concrete placement space for forming a column portion. Reinforcing bars between them and concrete for forming the beam Characterized in that it is configured to partition the inter concrete 設空 of 設空 between the column portions for forming.
Further, the present invention is a formwork for manufacturing a precast concrete beam column member in which a column part made of concrete for a column and a reinforcing bar is provided in a middle part in the length direction of the beam part made of concrete for a beam and a reinforcing bar. A beam formwork, a column formwork, and a partition plate, and the beam formwork has a concrete placement space for forming a beam part of the beam part located on one side of the pillar part. A first formwork for a beam extending in the horizontal direction and having an end in the extending direction being an open end, and a concrete placement for forming a beam portion of the beam portion located on the other side of the column portion The installation space extends in the horizontal direction, and an end portion in the extending direction is configured with a second beam formwork that is an open end facing the open end, and the column formwork is the first beam form. The beam forming portion is connected to the open end portion of the formwork and the open end portion of the second formwork for beam. It is configured to form a concrete placement space for forming a pillar portion that communicates with the cast placement space, and the partition plate is attached to and detached from the open ends of the first beam formwork and the second beam formwork, respectively. Reinforcing bars can be inserted between the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion, and the concrete placement space and column portion for forming the beam portion. It is comprised so that the concrete placement space for formation may be partitioned off.

  In the present invention, a partition plate into which a reinforcing bar is inserted is arranged at the boundary between the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion, so that the spaces are partitioned. It is possible to clean the concrete as designed at the boundary between the column and the pillar.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the precast concrete beam column member to be manufactured will be described.
FIG. 1 shows a perspective view of a precast concrete beam column member 10 to be manufactured.
The precast concrete beam column member 10 to be manufactured is provided with a reinforced concrete column portion 14 at an intermediate portion in the length direction of a beam portion 12 made of reinforced concrete.
The beam portion 12 is made of beam concrete and reinforcing bars, the column portion 14 is made of column concrete and reinforcing bars (not shown), and the cross section of the column portion 14 cut by a plane orthogonal to the length direction of the beam portion 12 is The cross section of the beam portion 12 cut by a plane orthogonal to the length direction of the beam portion 12 is larger.
The rebar for the beam portion includes the main rebar T1 and the stirrup rebar T2, and the rebar for the column portion also includes the main rebar and the hoop, although not shown.

FIG. 2 is a perspective view of the mold 20 with the end surface 2406 of the column mold 24 removed, and FIG. 3 shows a state in which the open end 36A of the concrete placement space 36 for forming the beam portion is partitioned by the partition plate 26. FIG. 4 is a perspective view of the state in which the open end 36A of the concrete placement space 36 for forming the beam portion is partitioned by the partition plate 26, as viewed from the inside of the concrete placement space 36, and FIG. FIGS. 6A, 6B, and 6C are explanatory views of the partition plate 26, and FIG. 7A. FIG. 6A is a front view of the state in which the open end 38A of the concrete placing space 38 for formation is partitioned by the partition plate 26. Thru | or (D) shows explanatory drawing of a manufacturing process.
The formwork 20 of the precast concrete beam column member 10 includes a beam formwork 22, a column formwork 24, and a partition plate 26.
The beam mold 22 is composed of a first beam mold 32 and a second beam mold 34.
The first beam formwork 32 is for forming a portion of the beam portion 12 located on one side of the column portion 14, and a concrete placement space 36 for forming the beam portion extends in the horizontal direction. An end portion in the extending direction is an open end 36A.
The second beam formwork 34 is for forming a portion of the beam portion 12 located on the other side of the column portion 14, and a concrete placement space 38 for forming the beam portion extends in the horizontal direction. An end in the extending direction is an open end 38A facing the open end 36A.
More specifically, each of the concrete placement spaces 36 and 38 is open at the top, three mold surfaces that form three of the four side surfaces of the beam portion 12, and the extension of the beam portion 12. A mold surface that forms an end face in the present direction is provided.
One of the three mold surfaces is a bottom surface facing upward, and the other two mold surfaces are a pair of side surfaces that stand up from both sides of the bottom surface and face each other.
The mold surface forming the end surface in the extending direction of the beam portion 12 stands up from the end portion in the extending direction of the bottom surface.

The column formwork 24 is connected to the open end portion 36A of the first beam formwork 32 and the open end portion 38A of the second formwork 34 for beams to form concrete placing spaces 36 and 38 for forming the beam portion. A concrete placement space 42 for forming a communicating column part is formed.
More specifically, the column formwork 24 includes an end face of the beam portion 12 located at the open end 36A of the first beam formwork 32 (an end face of the beam concrete C1 placed in the concrete placement space 36). The concrete casting for forming the column portion in cooperation with the end surface of the beam portion 12 located at the open end 38A of the second beam formwork 34 (the end surface of the concrete C1 for the beam cast in the concrete placement space 38). The installation space 42 is formed.
The column form 24 includes a bottom surface 2402 that partitions the bottom of the concrete placement space 42, and a pair of opposite side surfaces 2404 that project outward from a pair of side open ends 36A and 38A that partition the concrete placement spaces 36 and 38. And an end surface 2406 connecting the tips of the pair of side surfaces 2404.
In addition, since the cross section cut by the surface orthogonal to the length direction of the beam part 12 is larger than the beam part 12, the column part 14 is for column part formation cut by the surface orthogonal to the length direction of the beam part 12. The area of the concrete placement space 42 is larger than the areas of the concrete placement spaces 36 and 38 for forming beam portions cut by a plane orthogonal to the length direction of the beam portion 12.

A pair of partition plates 26 are provided so as to be detachable from the open ends 36A and 38A of the first beam formwork 32 and the second beam formwork 34, respectively.
Each partition plate 26 allows the main reinforcement T1 of the beam portion 12 to be inserted between the concrete placement spaces 36 and 38 for forming the beam portion and the concrete placement space 42 for forming the column portion, and for forming the beam portion. The concrete placement spaces 36 and 38 and the concrete placement space 42 for forming the column portion are configured to be partitioned.
Each partition plate 26 is configured by arranging a plurality of upper and lower steel plates having a notch and a steel plate not having a notch so that the main reinforcement T1 of the beam portion 12 is inserted.

In the present embodiment, each partition plate 26 is composed of four steel plates of a first steel plate 50, a second steel plate 52, a third steel plate 54, and a fourth steel plate 56 in order from the top. 50 and the third steel plate 54 are provided with a plurality of notches 5002, 5402, respectively.
The first steel plate 50 is disposed above the open end 36A of the first beam formwork 32 and above the open end 38A of the second beam formwork 34. Therefore, the first steel plate 50 is open below the first steel plate 50. 36A and 38A are formed.
In addition, the code | symbol 57 in FIG. 6 shows a bolt insertion hole.
In the present embodiment, the column part 14 has a cross section cut by a plane orthogonal to the length direction of the beam part 12 larger than the beam part 12, and a column part cut by a plane orthogonal to the length direction of the beam part 12. Since the area of the concrete placement space 42 for forming is larger than the area of the concrete placement spaces 36 and 38 for forming the beam portion cut by a plane orthogonal to the length direction of the beam portion 12, the first steel plate 50 is In addition to functioning as a partition plate 26 that is arranged at the boundary between the concrete placement spaces 36 and 38 for forming the beam portion and the concrete placement space 42 for forming the column portion, and for placing the concrete C2 for the column, The first steel plate 50 functions as the column form 24 without being sometimes removed, and the first steel plate 50 is used for the first and second types of beams regardless of when the concrete C1 for beams and the concrete C2 for columns are cast. It remains attached to the frames 32 and 34.
In addition, when the cross section which the pillar part 14 cut | disconnected in the surface orthogonal to the length direction of the beam part 12 is equal to the beam part 12, the concrete for pillar part formation cut | disconnected in the surface orthogonal to the length direction of the beam part 12 The area of the placement space 42 is equal to the area of the concrete placement spaces 36 and 38 for forming the beam portion cut by the plane orthogonal to the length direction of the beam portion 12. All the steel plates (partition plates) are removed when the concrete C2 for pillars is placed in the concrete placement space 42.

Next, the manufacturing method of the precast concrete beam pillar member 10 is demonstrated.
As shown in FIG. 2 and FIG. 7 (A), with the partition plate 26 and the end face 2406 of the column form frame 24 removed, the rebar for the beam portion and the rebar for the column portion assembled in another place, It is incorporated in the beam formwork 22 and the column formwork 24.
When the rebar for the beam portion and the rebar for the column portion are incorporated into the beam formwork 22 and the column formwork 24, a part (end surface 2406) of the column formwork 24 is removed as described above. In this case, it is advantageous to easily incorporate the rebar for the beam portion and the rebar for the column portion, and it is advantageous for easily attaching and removing the partition plate 26 described later.

Next, as shown in FIGS. 3 to 5 and FIG. 7 (B), the pair of partition plates 26 (more specifically, the first to fourth steel plates 50, 52, 54, and 56) are attached to the first type for beams. The main bars are arranged at the open ends 36A and 38A of the frame 32 and the second formwork 34 for the beam, respectively, and between the concrete placement spaces 36 and 38 for forming the beam portion and the concrete placement space 42 for forming the column portion. The concrete placement spaces 36 and 38 for forming the beam portion and the concrete placement space 42 for forming the column portion are partitioned in a state where the T1 is inserted.
Then, as shown in FIG. 7C, the beam concrete C1 is placed and cured in the concrete placement spaces 36 and 38 for forming beam portions.

Next, as shown in FIG. 7D, the partition plate 26 is removed (more specifically, only the first steel plate 50 is left and the remaining second to fourth steel plates 52, 54, and 56 are removed). The column mold 24 is assembled to the open ends 36A and 38A of the first mold 32 for beams and the second mold 34 for beams.
As shown in FIG. 7E, the end surface of the beam concrete C1 positioned at the open end 36A of the first beam formwork 32 and the beam end positioned at the open end 38A of the second beam formwork 34 are provided. For a column having a higher strength than the concrete C1 for a beam, in the concrete placing space 42 for forming a column part formed by the end surface of the concrete C1, the pair of side surfaces 2404, the pair of end surfaces 2606, and the first steel plate 50. Place concrete C2 and cure.

  In the present embodiment, the partition plate 26 into which the main reinforcement T1 of the beam portion 12 is inserted is arranged at the boundary between the concrete placement spaces 36 and 38 for forming the beam portion and the concrete placement space 42 for forming the column portion. Since the spaces 36, 38, and 42 are partitioned, it is possible to clean the concrete as designed at the boundary between the beam 12 and the column 14.

  In the present embodiment, the case of the precast concrete beam column member 10 in which the reinforced concrete column portion 14 is provided in the middle portion in the length direction of the reinforced concrete beam portion 12 has been described. Needless to say, the present invention can be applied to the precast concrete beam column member 10 in which the reinforced concrete column portion 14 is provided at the end of the beam portion 12 in the length direction.

It is a perspective view of the precast concrete beam pillar member 10 which should be manufactured. It is a perspective view of the mold 20 in a state where the end surface 2406 of the column mold 24 is removed. FIG. 3 is a perspective view of a state where an open end 36A of a concrete placement space 36 for forming a beam portion is partitioned by a partition plate 26. FIG. 3 is a perspective view of a state in which an open end 36A of a concrete placement space 36 for forming a beam portion is partitioned by a partition plate 26 as viewed from the inside of the concrete placement space 36. It is a front view of the state which divided the open end 38A of the concrete placement space 38 for beam part formation with the partition plate 26. FIG. (A), (B), (C) is explanatory drawing of the partition plate 26. FIG. (A) thru | or (D) are explanatory drawings of a manufacturing process.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Precast concrete beam column member, 12 ... Beam part, 14 ... Column part, 20 ... Formwork, 22 ... Formwork for beam, 24 ... Formwork for column, 26 ... Partition plate.

Claims (8)

Using a beam formwork and a column formwork, a manufacturing method for producing a precast concrete beam column member in which a reinforced concrete column part is provided at an end in a length direction of a reinforced concrete beam part,
The beam formwork is configured such that the concrete placement space for forming the beam portion extends in the horizontal direction and an end portion in the extending direction becomes an open end,
The column mold is configured to form a column-forming concrete placement space that is connected to the open end portion of the beam mold and communicates with the beam-forming concrete placement space. ,
Incorporating the rebar for the beam and the rebar for the column into the beam formwork and the column formwork,
A partition plate is disposed at the open end of the beam formwork, and the reinforcing bar is inserted between the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion. Partitioning the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion,
After placing the concrete for beam in the concrete placement space of the beam formwork and curing, remove the partition plate,
Column concrete is placed in a concrete placement space for forming a column portion formed by an end face of the concrete for beam located at the open end of the concrete placement space for the beam formwork and the formwork for the column. And he was going to take care
A method for producing a precast concrete beam column member. Using a beam formwork and a column formwork, a manufacturing method for producing a precast concrete beam column member in which a reinforced concrete column part is provided in an intermediate part in the length direction of a reinforced concrete beam part,
In the beam formwork, a concrete placement space for forming a beam portion of the beam portion located on one side of the column portion extends in a horizontal direction, and an end portion in the extending direction is an open end. The first beam formwork and the concrete placement space for forming the beam portion of the beam portion located on the other side of the column portion extend in the horizontal direction, and the end portion in the extending direction is It is composed of a second formwork for a beam that is an open end facing the open end,
The column mold is connected to the open end portion of the first beam formwork and the open end portion of the second beam formwork to communicate with the concrete placing space for forming the beam portion. Constructed to form a concrete placement space for column formation,
Incorporating the rebar for the beam and the rebar for the column into the beam formwork and the column formwork,
Partition plates are respectively disposed at open ends of the first beam formwork and the second beam formwork, and a concrete placement space for forming the beam portion and a concrete placement space for forming the column portion are provided. Partitioning the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion in a state where the reinforcing bar is inserted between,
Placing concrete for beam in the concrete placement space of the first formwork for beams and the concrete placement space of the second formwork for beams, after curing, removing the partition plate,
An end face of the concrete for the beam positioned at the open end of the concrete placement space of the first formwork for the beam, an end face of the concrete for the beam located at the open end of the concrete placement space of the second formwork for the beam, Column concrete was placed in a concrete placement space for pillar formation formed with the above-mentioned column form, and was cured.
A method for producing a precast concrete beam column member. A part of the column formwork is removed when the beam part reinforcement and the column part reinforcement are incorporated into the beam formwork and the column formwork;
The method for producing a precast concrete beam column member according to claim 1 or 2. The column part has a larger cross-section cut by a plane perpendicular to the length direction of the beam part than the beam part,
The area of the concrete forming space for forming the column portion cut by a plane perpendicular to the length direction of the beam portion is equal to the concrete placement space for forming the beam portion cut by a plane orthogonal to the length direction of the beam portion. Larger than the space of the installation space,
The partition plate is configured by arranging a plurality of steel plates having a notch and a steel plate not having a notch so that the rebar is inserted, vertically.
The uppermost steel sheet is provided at the upper part of the open end of the concrete casting space of the first formwork for beams and the upper part of the open end of the concrete placement space of the second formwork for beams. It is not removed when the concrete for pillars is placed in the concrete placement space for forming, and functions as a mold surface of the pillar formwork,
The manufacturing method of the precast concrete beam pillar member of Claim 2 characterized by the above-mentioned. A formwork for producing a precast concrete beam column member in which a column portion made of concrete for a column and a reinforcing bar is provided at the end in the length direction of the beam portion made of concrete for a beam and a reinforcing bar,
A beam formwork, a pillar formwork, and a partition plate,
The beam formwork is configured such that the concrete placement space for forming the beam portion extends in the horizontal direction and an end portion in the extending direction is an open end,
The column form is configured to form a column forming concrete placement space that is connected to an open end portion of the beam form and communicates with the beam forming concrete placement space;
The partition plate is detachably disposed at an open end of the beam formwork, and a reinforcing bar can be inserted between the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion. And is configured to partition the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion,
A formwork for manufacturing a precast concrete beam column member. A formwork for producing a precast concrete beam column member in which a column part made of concrete for a column and a reinforcing bar is provided in the middle part in the length direction of the beam part made of concrete for a beam and a reinforcing bar,
A beam formwork, a pillar formwork, and a partition plate,
In the beam formwork, a concrete placement space for forming a beam portion of the beam portion located on one side of the column portion extends in a horizontal direction, and an end portion in the extending direction is an open end. The first beam formwork and the concrete placement space for forming the beam portion of the beam portion located on the other side of the column portion extend in the horizontal direction, and the end portion in the extending direction is It is composed of a second formwork for a beam which is an open end facing the open end,
The column formwork is connected to the open end part of the first beam formwork and the open end part of the second formwork for beam to communicate with the concrete placement space for forming the beam part. It is configured to form a concrete placement space for pillar formation,
The partition plates are detachably disposed at the open ends of the first beam formwork and the second beam formwork, respectively, and the concrete forming space for forming the beam part and the concrete forming part for forming the column part are provided. It is configured to allow a reinforcing bar to be inserted between the installation space and partition the concrete placement space for forming the beam portion and the concrete placement space for forming the column portion,
A formwork for manufacturing a precast concrete beam column member. The partition plate is configured by vertically arranging a plurality of steel plates having a notch and a steel plate not having a notch so that the reinforcing bar is inserted,
The form for manufacturing a precast concrete beam column member according to claim 5 or 6. The column part has a larger cross-section cut by a plane perpendicular to the length direction of the beam part than the beam part,
The area of the concrete forming space for forming the column portion cut by a plane perpendicular to the length direction of the beam portion is equal to the concrete placement space for forming the beam portion cut by a plane orthogonal to the length direction of the beam portion. Larger than the space of the installation space,
The partition plate is configured by arranging a plurality of steel plates having a notch and a steel plate not having a notch so that the rebar is inserted, vertically.
The uppermost steel plates are provided at the top of the open end of the concrete casting space of the first formwork for beams and the top of the open end of the concrete placement space of the second formwork for beams, respectively. Are formed with a plurality of open notches,
A formwork for producing a precast concrete beam column member according to claim 6.

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