JP4833591B2 - Connection method for precast concrete columns and beams - Google Patents

Description

  The present invention relates to a connecting method for a precast concrete column / beam member that integrally connects a precast concrete column member and a precast concrete beam member.

  In the above-mentioned precast concrete column / beam member connection method, conventionally, the reinforcing bars of the beam members are buried and fixed in advance so that a part of the reinforcing bars protrudes from the end face of the beam, and the reinforcing bars of the column members are partially above the column. It is embedded and fixed in advance so as to protrude from the end face, the beam member is arranged so that the end thereof overlaps the upper end surface of the column, and the reinforcing bar portions protruding from the end surface of the beam and the upper end surface of the column are connected as appropriate. By installing a formwork between adjacent beam members in the circumferential direction of the member, surrounding the upper end surface of the column with the beam member and the formwork, and placing concrete inside it, the column member and the beam A construction method (for example, refer to Patent Documents 1 to 4: hereinafter referred to as the first prior art) or a reinforcing member of the beam member is embedded and fixed in advance so that a part protrudes from the beam end surface. At the same time, the reinforcing bar insertion hole should be opened at the top end of the column. The pre-cast concrete block member provided in advance in the column member and having a lateral joint surface with respect to the beam end surface and a downward joint surface with respect to the column upper end surface is provided in advance so as to open insertion holes for reinforcing bars in each joint surface. Place the block member so that the downward joint surface faces the upper end surface of the column, and insert the reinforcing bar protruding from the beam end surface into the insertion hole opened in the lateral joint surface. The reinforcing reinforcement for relay is inserted through the insertion hole opened in the surface and the insertion hole opened in the upper end surface of the column, and the beam member, the column member, the block member and each reinforcement reinforcement are integrated with the grout material. There is a construction method (for example, refer to Patent Documents 5 and 6: hereinafter referred to as the second prior art) in which the column member and the beam member are integrally connected via the block member by joining.

Japanese Patent Laid-Open No. 8-113981 JP 2000-120166 A Japanese Patent No. 3400364 JP 2000-199185 A Japanese Patent Publication No. 6-104991 JP 2004-278257 A

According to the first prior art, the concrete is finally cast and the column member and the beam member are integrally connected. Therefore, the step of installing the concrete casting mold and the concrete are cast. It is necessary to provide a process and a process of removing the formwork. According to the second conventional technique, the pillar member and the beam member are integrated with each other through the block member by finally joining together with a grout material. Since it is connected to the concrete, there is no need to place concrete and the process can be simplified compared to the first prior art, but it is installed between the column member and beam member separately from the column member and beam member. It is necessary to manufacture a block member to be manufactured, and there is a disadvantage that the number of members increases.
The present invention has been made in view of the above circumstances, and it is possible to simplify a process with a small number of members when integrally connecting a column member and a beam member made of precast concrete. Objective.

A first characteristic configuration of the present invention is a precast concrete column / beam member connection method for integrally connecting a precast concrete column member and a pair of precast concrete beam members disposed on the column member. The rebar insertion hole in which each rebar of the beam member is embedded and fixed in advance so that a part of the rebar protrudes from the end surface of the beam, both ends are open on the side of the column, and the joint member of the rebar is embedded Is provided in advance in the column member, and the reinforcing bar portion protruding from the beam end surface of one of the beam members is inserted into the insertion hole from one opening and protrudes from the beam end surface of the other beam member. rebar portions are then inserted into the insertion hole from the other opening, and connected to each other by the joint member, the beam end face and the pillar side, and the pillar member and the reinforcing bar, the upper column end surface of said post member It lies in joining together with grout injected from grout holes mouth.

[Action and effect]
Since the column side of the column member and the beam end surface of the beam member are opposed to each other, the reinforcing bars are installed so that they can be embedded and fixed across the column member and the beam member. Reinforcing bars can be installed so that they can be embedded and fixed across the column members and beam members in a state where they face each other so that they are close to each other and cross the gaps between the facing parts. Without placing, the column side surface and the beam end surface, and the reinforcing bar and the column member can be integrally joined with the grout material .
Therefore, when integrally connecting the column member and the beam member made of precast concrete, there is no need to place concrete and formwork as in the first prior art, nor to block members as in the second prior art. Thus, the process can be simplified with a small number of members.
Moreover, there is no need to bond the blocking member as in the second prior art pillar upper end face, it can also reduce the amount of grout can be applied by low cost.

  Furthermore, the reinforcing bars are installed so that the reinforcing bars can be embedded and fixed across the column member and the beam member by inserting the reinforcing bar part protruding from the beam end face into the insertion hole opened on the column side surface. In addition, the process can be simplified as compared with the case where it is installed separately from the beam member.

Embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
1 to 4 show a precast concrete column member 1 and a precast concrete beam member having a substantially square column shape used for constructing a building frame A to be described later in the precast concrete column / beam connection method according to the present invention. As shown in FIGS. 1 to 3, the column member 1 includes four substantially flat column side surfaces 3 and column end surfaces 4a and 4b, and the beam member 2 includes, as shown in FIG. Four substantially flat beam side surfaces 5 and beam end surfaces 6 (6a, 6b) are provided.

  FIG. 1 shows a central column member 1a erected at the center of the frame A as shown in FIG. 5. For each combination of two column side surfaces 3 substantially parallel to each other, a beam reinforcing bar (an example of a reinforcing bar) 7 is shown. A plurality of insertion holes (hereinafter referred to as beam reinforcing bar insertion holes) 8 are opened substantially horizontally through the column member 1a so as not to cross each other using a sleeve material or the like, and are opened at the top of each of the four column side surfaces 3. In this way, a joint member 9 for connecting reinforcing bars is embedded in a longitudinal intermediate portion of each beam reinforcing bar insertion hole 8.

  FIG. 2 shows a side column member 1b erected on the outer side of the frame A as shown in FIG. 7, and a plurality of beam reinforcing bar insertion holes 8 are connected to each other for each combination of two column side surfaces 3 substantially parallel to each other. The column member 1b is penetrated substantially horizontally so as not to intersect, and is opened in the upper part of each column side surface 3 in advance, and at the middle in the longitudinal direction of each beam rebar insertion hole 8 opened in the column side surface 3 of one combination A joint member 9 for connecting reinforcing bars is embedded in the bottom.

  FIG. 3 shows a corner column member 1c erected at the corner of the frame A as shown in FIG. 9, and a plurality of beam reinforcing bar insertion holes 8 are connected to each other for each combination of two column side surfaces 3 that are substantially parallel to each other. The column member 1c is penetrated substantially horizontally so as not to intersect, and is opened in advance at the top of each column side surface 3.

Each column member 1 (1a, 1b, 1c) is provided with a plurality of substantially vertical column reinforcing bar insertion holes 10 opened in the lower column end face 4b in advance, and a plurality of substantially vertical column reinforcing bars 11 are arranged at the upper end. The lower end side of the column rebar 11 that faces the back side of the column rebar insertion hole 10 is embedded and fixed so that the side protrudes from the upper column end surface 4a at a substantially right angle and the lower end side faces the back side of the column rebar insertion hole 10 A joint member 9 for connecting reinforcing bars is attached to the above.

  As shown in FIG. 4, the beam member 2 is provided with four beam side surfaces 5 that are substantially flat with left and right beam side surfaces and upper and lower beam side surfaces having a horizontal width equal to or smaller than the horizontal width of the column side surface 3. Are formed in advance using a sleeve material or the like, and a plurality of substantially horizontal beam reinforcing bars 7 are connected to one end of the beam reinforcing bar 7 at one end. The other side is embedded and fixed so as to protrude from the other beam end surface 6b at a substantially right angle, and the other side faces the rear side of the reinforcing bar insertion hole 8 of the beam reinforcing bar 7. A joint member 9 for connecting reinforcing bars is attached to one end side.

  Next, in order to construct the building frame A, the precast concrete column / beam member connecting method according to the present invention for integrally connecting the above-mentioned column member 1 (1a, 1b, 1c) and the beam member 2 is illustrated in FIG. 5 to 9 will be described.

  As shown in FIG. 5, the central column member 1 a is installed so that the existing column reinforcing bar 11 a protruding from the upper column end surface of the existing central column member 20 a in the previously constructed lower frame enters the column reinforcing bar insertion hole 10. Then, the column reinforcing bar 11 is connected to the existing column reinforcing bar 11 a by the joint member 9, and is temporarily fixed by the fall prevention jig 12.

  Next, as shown in FIG. 6 (a), using the four beam members 2, each column side surface 3 of the central column member 1a is opposed to one beam end surface 6b of each beam member 2, By inserting each beam reinforcing bar portion 7a protruding from each beam end face 6b into the beam reinforcing bar insertion hole 8 of the central column member 1a, the central column member 1a is sandwiched as shown in FIGS. 6 (b) and 6 (c). Can be embedded and fixed across the central column member 1a and each beam member 2 in a state in which the beam reinforcing bar portions 7a facing each other are connected by the joint member 9 and the opposite side of the column side surface 3 and the beam end surface 6b are crossed. Thus, the beam reinforcing bars 7 are installed, and each beam member 2 is supported by the temporary support 13.

  Next, as shown in FIG. 7 (a), the beam reinforcing bar insertion hole 8 in which the joint member 9 of the side column member 1b is not mounted is opened using the four side column members 1b. The existing column reinforcing bar 11a protruding from the upper column end surface of the existing side column member 20b in the lower frame constructed in advance with the column side surface 3 and the other beam end surface 6a of the beam member 2 facing each other is a column reinforcing bar. The side column member 1 b is installed so as to enter the insertion hole 10, the column rebar 11 is connected to the existing column rebar 11 a by the joint member 9, and temporarily fixed by the fall prevention jig 12.

  Then, by inserting the beam rebar 7b (7) across the beam rebar insertion hole 8 of each side column member 1b and the beam rebar insertion hole 8 of each beam member 2, FIG. 7 (B), (C) As shown in FIG. 2, the beam rebar 7b is connected to the beam rebar 7 embedded and fixed in the beam member 2 with a joint member 9, and the side portion is crossed across the opposite portion between the column side surface 3 and the beam end surface 6a. The beam reinforcing bar 7 is installed so that it can be embedded and fixed over the column member 1 b and each beam member 2, and each side column member 1 b is temporarily fixed by the fall-preventing jig 12.

  Next, as shown in FIG. 8 (a), using the eight beam members 2, the remaining two column side surfaces 3 of the side column member 1b are opposed to one beam end surface 6b of each beam member 2. Then, by inserting each beam reinforcing bar portion 5a protruding from the beam end face 6b into the beam reinforcing bar insertion hole 8 of the side column member 1b, as shown in FIGS. The side column member 1b and each beam member 2 are connected in such a manner that the beam reinforcing bar portions 7a opposed to each other across the column member 1b are connected by the joint member 9 and traverse the opposite portion between the column side surface 3 and the beam end surface 6b. Beam rebars 7 are installed so that they can be buried and fixed, and each beam member 2 is supported by temporary struts 13.

  Next, as shown in FIG. 9 (a), using the four corner column members 1c, the other beam end surface 6a of each beam member 2 is opposed to the column side surface 3 of each corner column member 1c. Thus, the corner column member 1 c is installed so that the existing column reinforcement 11 a protruding from the upper column end surface of the existing corner column member 20 c in the lower frame constructed in advance enters the column reinforcement insertion hole 10.

  Then, by inserting the beam reinforcing bar 7b (7) across the beam reinforcing bar insertion hole 8 of each corner column member 1c and the beam reinforcing bar insertion hole 8 of each beam member 2, FIG. In the state where the beam reinforcing bar 7b is connected to the beam reinforcing bar 7 embedded and fixed to the beam member 2 by a joint member 9, and the opposite side of the column side surface 3 and the beam end surface 6a is crossed, The beam rebar 7 is installed so that it can be embedded and fixed over the column member 1 c and each beam member 2, and each corner column member 1 c is temporarily fixed by the fall prevention jig 12.

  Next, by injecting a grout material from the grout hole 14 communicating with each beam reinforcing bar insertion hole 8 and each column reinforcing bar insertion hole 10, each column side surface 3, each beam end surface 2, each column end surface 4a, 4b, Further, the beam reinforcing bar 7 and the column member 1 and the beam member 2, the existing column reinforcing bar 11a and the column member 1 are joined together, and the beam reinforcing bar 7 is embedded and fixed across the column member 1 and the beam member 2 to prevent falling. The jig 12 and the temporary support 13 are removed.

[Second Embodiment]
10 to 17 show another embodiment of the connecting method of the precast concrete column / beam member according to the present invention, and another embodiment of the column member 1 and the beam member 2 used for constructing the building frame A by the connecting method. The form is shown.

  FIG. 10 shows a central column member 1a erected at the center of the frame A. For each combination of two column side surfaces 3 substantially parallel to each other, the column member 1a is substantially horizontal so that a plurality of beam rebars 7 do not intersect each other. It is embedded and fixed in advance so that both end portions protrude from the upper part of each of the four column side surfaces 3.

FIG. 11 shows a side column member 1b erected on the outer side of the frame A, and penetrates a plurality of substantially horizontal beam rebars 7 so as to project at substantially right angles above the two column side surfaces 3 that are substantially parallel to each other. In addition, the plurality of beam reinforcing bar insertion holes 8 opened in the upper part of the remaining two column side surfaces 3 that are substantially parallel to each other are formed so as to penetrate substantially horizontally so as not to cross the beam reinforcing bar 7.
As the corner column member 1c, the corner column member 1c shown in the first embodiment is used.

  As shown in FIG. 12, the beam member 2 is provided with a plurality of substantially horizontal beam rebar insertion holes 8 opened in both beam end faces 6 in advance, and a plurality of substantially horizontal beam rebars 7 are provided at both ends. A joint member 9 for connecting reinforcing bars is attached to each end portion facing the back side of the reinforcing bar insertion hole 8 of each beam rebar 7 while being embedded and fixed so as to face the back side of the insertion hole 8.

  Next, the column / beam member connecting method according to the present embodiment will be described with reference to FIGS.

  As shown in FIG. 13, the central column member 1 a is arranged so that the existing column reinforcing bar 11 a protruding from the upper column end surface of the existing central column member 20 a in the previously constructed lower frame enters the column reinforcing bar insertion hole 10. It installs, the column reinforcement 11 is connected to the existing column reinforcement 11a with the joint member 9, and is temporarily fixed with the fall prevention jig | tool 12. FIG.

Next, as shown in FIG. 14 (a), using the four beam members 2, each column side surface 3 of the central column member 1a is opposed to one beam end surface 6 of each beam member 2, By inserting each beam reinforcing bar portion 7a protruding from each column side surface 3 into each beam reinforcing bar insertion hole 8 of the beam member 2, FIG.
As shown in (c), the beam reinforcing bar portion 7 a is connected to the beam reinforcing bar 7 embedded and fixed in the beam member 2 by a joint member 9, and in a state of traversing the opposite portion between the column side surface 3 and the beam end surface 6. The beam rebar 7 is installed so that it can be embedded and fixed across the central column member 1 a and each beam member 2, and each beam member 2 is supported by temporary columns 13.

  Next, as shown in FIG. 15 (a), the beam reinforcing bar insertion hole 8 in which the joint member 9 of the side column member 1b is not mounted is opened using the four side column members 1b. An existing column reinforcing bar 11a protruding from the upper column end surface of the existing side column member 20b in the lower frame constructed in advance with the column side surface 3 and the other beam end surface 6 of the beam member 2 facing each other is The side column member 1b is installed so as to enter the reinforcing bar insertion hole 8.

  Then, by inserting the beam rebar 7b (7) through each beam rebar insertion hole 8 of each side column member 1b and each beam rebar insertion hole 8 of each beam member 2, FIG. As shown in (c), the beam rebar 7b is connected to the beam rebar 7 embedded and fixed in the beam member 2 by a joint member 9, and in a state of crossing the opposite portion between the column side surface 3 and the beam end surface 6, The beam reinforcement 7 is installed so that it can embed and fix over each side column member 1b and each beam member 2, and each side column member 1b is temporarily fixed with the fall prevention jig 12.

Next, as shown in FIG. 16 (a), eight beam members 2 are used so that each column side surface 3 of the side column member 1b and one beam end surface 6 of each beam member 2 face each other. 16 (b), by inserting each beam reinforcing bar portion 7a protruding from each column side surface 3 into the beam reinforcing bar insertion hole 8 of each beam member 2.
As shown in (c), the beam reinforcing bar portion 7 a is connected to the beam reinforcing bar 7 embedded and fixed in the beam member 2 by a joint member 9, and in a state of traversing the opposite portion between the column side surface 3 and the beam end surface 6. The beam reinforcing bars 7 are installed so that they can be embedded and fixed across the side column members 1 b and the beam members 2, and the beam members 2 are supported by temporary columns 13.

  Next, as shown in FIG. 17 (a), as in the first embodiment, using the four corner column members 1c, each beam member 2 is attached to the column side surface 3 of each corner column member 1c. The other end of the beam 6 is opposed so that the existing column reinforcing bar 11a protruding from the upper column end surface of the existing corner column member 20c in the previously constructed lower frame enters the column reinforcing bar insertion hole 10. The column member 1c is installed.

  Then, by inserting the beam rebar 7b through the beam rebar insertion hole 8 of each corner column member 1c and the beam rebar insertion hole 8 of each beam member 2, as shown in FIGS. 17 (b) and (c). In addition, each of the corner column members is connected to the beam rebar 7 embedded in and fixed to the beam member 2 by a joint member 9 so as to cross the opposite portion between the column side surface 3 and the beam end surface 6. The beam rebar 7 is installed so that it can be embedded and fixed over 1 c and each beam member 2, and each corner column member 1 c is temporarily fixed by the fall-preventing jig 12.

Next, as in the first embodiment, by injecting a grout material from the grout hole 14 communicating with each beam rebar insertion hole 8 and each column rebar insertion hole 10, each column side surface 3 and each beam end surface 2, The column end faces 4a and 4b, the beam reinforcing bar 7, the column member 1 and the beam member 2, the existing column reinforcing bar 11a and the column member 1 are joined together, and the beam reinforcing bar 7 is connected to the column member 1 and the beam member 2. It is buried and fixed, and the fall prevention jig 12 and the temporary support 13 are removed.
Other configurations are the same as those of the first embodiment.

[Other Embodiments]
1. The precast concrete column / beam member connection method according to the present invention may be implemented by appropriately combining the various column members and the various beam members shown in the first and second embodiments.
2. The precast concrete column / beam member connecting method according to the present invention can be implemented using column members and beam members having various reinforcement structures as required.
3. The precast concrete column / beam member connecting method according to the present invention can be carried out using column members and beam members having various appearance shapes as required.
4). The precast concrete column / beam member connecting method according to the present invention uses a beam member in which reinforcing bars are embedded and fixed in advance so as to protrude from both beam end faces, and the reinforcing bar portions protruding from both beam end faces are used. Reinforcing bars may be installed so that each can be inserted through an insertion hole formed so as to open on the column side surface of the column member and can be embedded and fixed over the column member and the beam member.
5). In the connecting method of precast concrete columns and beam members according to the present invention, the reinforcing bars are provided over the insertion holes formed in the column members in advance and the insertion holes formed in the entire length of the beam members. Reinforcing bars may be installed so that they can be inserted and embedded between the column member and the beam member.
6). The precast concrete column / beam connection method according to the present invention is such that when a plurality of column members are joined vertically at the lower end position of the beam member, the column side surface and the beam end surface on the lower end side of the column member face each other. In this case, the column member and the beam member may be used to be connected together.

Cross section of central column member Cross section of side column member Cross section of corner column member Cross section of beam member Illustration of the connection method Illustration of the connection method Illustration of the connection method Illustration of the connection method Illustration of the connection method Sectional drawing of the center pillar member of 2nd Embodiment Sectional drawing of the side pillar member of 2nd Embodiment Sectional drawing of the beam member of 2nd Embodiment Explanatory drawing of the connecting method of the second embodiment Explanatory drawing of the connecting method of the second embodiment Explanatory drawing of the connecting method of the second embodiment Explanatory drawing of the connecting method of the second embodiment Explanatory drawing of the connecting method of the second embodiment

1 Column member 2 Beam member 3 Column side
4a Upper column end face 6 Beam end face 7 Reinforcing bar 7a Reinforcing bar part 8 Insertion hole 9 Joint member
14 Grout hole

Claims (1)

A precast concrete column member and a beam member connection method for integrally connecting a precast concrete column member and a pair of precast concrete beam members disposed on the column member,
Pre-embedding and fixing each rebar of the beam member so that a part protrudes from the beam end face,
Both ends are opened in the side of the column, and the insertion hole of the reinforcing bar in which the joint member of the reinforcing bar is embedded is provided in the column member in advance,
The reinforcing bar portion protruding from the beam end surface of one beam member is inserted into the insertion hole from one opening, and the reinforcing bar portion protruding from the beam end surface of the other beam member is inserted from the other opening into the insertion hole. Inserted through the hole, connected to each other with the joint member,
Precast concrete column / beam member connection method in which the column side surface and the beam end surface, and the reinforcing bar and the column member are integrally joined with a grout material injected from a grout hole opened in the upper column end surface of the column member. .

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