JP2012132203A - Junction structure of precast concrete member, structure and construction method of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a junction structure of a precast concrete member capable of constructing a structure without successively assembling the precast concrete member from a lower story, the structure and a construction method of the structure.SOLUTION: A joint part 26 of a column member 12 is provided with a recessed insertion part 60, and a recessed housing part 44 housing a sleeve joint 46 is provided on an end face 28 of a beam member 14. The joint part 26 and the end face 28 are not provided with a member projected from the joint part 26 and the end face 28 or the like, and are in a flat state. By turning the joint part 26 and the end face 28 to the flat state, since the plurality of column members 12 are erected side by side and then the beam members 14 keeping the posture in a horizontal state can be inserted between the column members 12, the structure can be constructed by a folding screen erecting method without assembling them successively from a lower story.

Description

  The present invention relates to a joint structure of a precast concrete member, a structure provided with the joint structure of the precast concrete member, and a construction method of the structure.

  The joint structure of the precast concrete member described in Patent Document 1 is joined to a lower column member, a horizontal member that is joined to a joint provided at the upper end of the lower column member and includes a beam portion, and the horizontal member. And an upper column member provided on the opposite side of the lower column member and having a joint provided on the lower end portion joined to the horizontal member.

  That is, by assembling and constructing the lower pillar member, the horizontal member, and the upper pillar member in order from the lower floor, the structure is constructed without placing concrete on site.

Japanese Patent No. 2009-97309

  However, in this joint structure of precast concrete members, the upper floor is assembled after the lower floor is assembled. In other words, the framework is assembled from the lower floor to the upper floor in order, and heavy machinery such as a crane truck for lifting the precast concrete member must be frequently moved at a site with a large floor area.

  The subject of this invention is constructing a structure, without assembling a precast concrete member in order from a lower floor.

  The joint structure of the precast concrete member according to claim 1 of the present invention includes a column member made of precast concrete, a beam member made of precast concrete in which an end surface is joined to a column joint portion of the column member, and the end surface or the Provided on one of the column joints, an insertion part formed by making a part of the end face or the column joint part concave, and provided on the end face or the column joint part where the insertion part is not provided A housing part formed by making a part of the end face or the column joint part concave, and the housing part when the joint part is accommodated in the housing part and the pillar joint part and the end face are joined. A joint member that is pulled out from and is disposed so as to straddle the housing portion and the insertion portion, and the joint portion is disposed so as to straddle the housing portion and the insertion portion, The fitting is filled in the housing part Characterized by comprising a filler for fixing the timber to the said post Joint portion and the end surface.

  According to the joining structure having the above-described configuration, a concave insertion portion is provided on one of the column connection portion or the end surface, and a concave shape communicating with the insertion portion is provided on the column connection portion or the end surface where the insertion portion is not provided. A receiving part is provided. In addition, a joint member that is pulled out and disposed so as to straddle the insertion portion and the accommodation portion is accommodated in an accommodation portion formed in the column connection portion or the end face. That is, the column fitting part and the end face are not provided with a member protruding from the column fitting part and the end face, and are in a flat state.

  When constructing a structure, column members having a flat column joint are arranged in a row in the horizontal direction. Next, a beam member is arranged between the column members arranged in one row, and the column connection portion of the column member and the end surface of the beam member are opposed to each other.

  In a state where the column mouth portion and the end face face each other, the joint member is pulled out from the housing portion and disposed so as to straddle the housing portion and the insertion portion. In this state, the accommodating portion and the insertion portion are filled with a filler, the joint member is fixed at the position, and the end face and the column mouth portion are joined.

  After completion of the construction of the first row of column members and beam members, the construction of the second row of column members and beam members is performed adjacent to the first row as in the first row. Then, after the construction of the column members and beam members in the second row is completed, the column members and beam members in the third row are constructed adjacent to the second row in the same manner as in the second row.

  In this way, by setting the column connection part and the end face in a flat state, a plurality of column members are arranged in a row, and a beam member that maintains a horizontal posture is placed between the column members. Since it can be inserted, the column member and the beam member in the first row are joined efficiently.

  In addition, by joining the column member and the beam member for each row in this way, it is possible to assemble the first row, the second row, the third row, and the framework in order from the lateral direction. Thereby, a structure can be constructed without assembling sequentially from the lower floor.

  The joint structure of the precast concrete member according to claim 2 of the present invention is the column according to claim 1, wherein the joint member is a cylindrical sleeve joint and includes a housing portion in which the sleeve joint is housed. A first reinforcing bar that is provided inside the member or the beam member, and whose end is inserted into the sleeve joint and does not protrude from the column joint or the end surface; A second rebar that is provided inside the beam member and has an end inserted into the sleeve joint disposed so as to straddle the accommodating portion and the insertion portion, and does not protrude from the column connection portion or the end face , Provided.

  According to the joining structure having the above-described configuration, the first reinforcing bar of the column member or the beam member and the second reinforcing bar of the beam member or the column member are joined via the sleeve joint, so that the column member and the beam member are more firmly connected. Can be joined.

  According to a third aspect of the present invention, there is provided a structure having the precast concrete member joining structure according to the first or second aspect.

  According to the structure having the above-described structure, the structure includes the precast concrete member joining structure according to claim 1 or 2. Therefore, by assembling the first row, the second row, the third row and the framework in order from the horizontal direction, heavy machinery such as crane trucks that lift precast concrete members, etc., are frequently moved even on a large floor area. The structure can be constructed without any problems.

  A construction method for a structure according to claim 4 of the present invention is a construction method for constructing a structure using the precast concrete member joining structure according to claim 1 or 2, wherein the pillar member is disposed in the horizontal direction. A step of arranging the beam members between the column members arranged in a row, and a step of making the column connection portion of the column members and the end surface of the beam members face each other, The step of arranging the joint member so that the joint member is pulled out from the housing portion and straddling the housing portion and the insertion portion in a state where the column mouth portion and the end face face each other, and the joint member is inserted into the housing portion and the insertion portion. A step of filling the accommodating portion and the insertion portion with a filler and fixing the joint member to the end surface and the column joint portion in a state of straddling the portion. .

  According to the structure having the above-described structure, first, the column members are erected in a row in the horizontal direction, and a beam member is arranged between the column members arranged in a row to form a column joint portion of the column member. The end faces of the beam members are made to face each other.

  Further, the joint member is pulled out from the housing portion and disposed so as to straddle the housing portion and the insertion portion in a state in which the column mouth portion and the end face are opposed to each other. Then, with the joint member straddling the accommodation portion and the insertion portion, the filler is applied to the accommodation portion and the insertion portion, the joint member is fixed at that position, and the end face and the column joint portion are joined. In this way, the construction of the column members and beam members in the first row is completed.

  After the first row of frames is completed, the second row of column members and beam members are constructed next to the first row in the same manner as the first row. Then, after the frame in the second row is completed, the column member and the beam member in the third row are constructed adjacent to the second row in the same manner as in the second row.

  In this way, by assembling the first row, the second row, the third row and the framework in order from the horizontal direction, it is possible to construct the structure without assembling the framework in order from the lower floor.

  According to the present invention, a structure can be constructed without assembling precast concrete members in order from the lower floor.

It is the perspective view which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is sectional drawing which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is sectional drawing which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is sectional drawing which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is sectional drawing which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is sectional drawing which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is the expanded sectional view which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. (A) (B) (C) It is process drawing which showed the junction part of the column member used for the junction structure concerning the embodiment of the present invention. It is the perspective view which showed the junction part of the column member used for the junction structure which concerns on embodiment of this invention. It is the side view which showed the column member and beam member which are used for the joining structure which concerns on embodiment of this invention. It is process drawing which showed the enforcement process of the structure which concerns on embodiment of this invention. It is process drawing which showed the enforcement process of the structure which concerns on embodiment of this invention. It is process drawing which showed the enforcement process of the structure which concerns on embodiment of this invention.

  An example of a precast concrete member joining structure according to an embodiment of the present invention, a structure using the precast concrete member joining structure, and a construction method of the structure will be described with reference to FIGS. In addition, arrow UP in a figure shows the perpendicular direction upper direction.

(overall structure)
As shown in FIG. 10, a precast concrete member joining structure 10 employed in a structure 32 (see FIG. 13) includes a precast column member 12 (hereinafter referred to as PCa) that extends in the vertical direction, and a column member 12. And a beam member 14 made of PCa extending in the horizontal direction.

  Specifically, the longitudinal ends of the pillar members 12 extending in the vertical direction are joined to the longitudinal ends of the other pillar members 12, and the ends of the plurality of pillar members 12 are joined. And the elongate pillar 13 is provided. And the beam member 14 extended in the horizontal direction is arrange | positioned between this pillar 13, The end part 28 (refer FIG. 1) of the beam member 14, and the joint part 26 (refer FIG. 1) provided in the side surface of the column member 12 Are joined to the column member 12.

[Junction structure of column member 12 and column member 12]
Next, a joint structure between the column member 12 and the column member 12 will be described. For convenience of explanation, a column disposed on the lower side is referred to as a column member 12A, and a column disposed on the upper side of the column member 12A is referred to as a column member 12B. If there is no particular need for explanation, A and B will be omitted.

  As shown in FIG. 9, the upper end surface 18 of the column member 12 </ b> A disposed on the lower side has a rectangular shape, and extends in the longitudinal direction of the column member 12 </ b> A so as to extend along the edge that constitutes the upper end surface 18. Twelve column main bars 16 are provided so as to protrude from the upper end surface 18.

  On the other hand, the lower end surface 20 of the column member 12B joined to the upper end surface 18 of the column member 12A is also rectangular like the upper end surface 18 of the column member 12A. Then, twelve sheath tubes 22 are embedded so as not to protrude from the lower end surface 20 of the column member 12B at a position facing the column main reinforcement 16 protruding from the upper end surface 18 of the column member 12A.

  A hollow tube 24 is provided inside each sheath tube 22, and the hollow tube 24 is sheathed by a fixing means (not shown) so that the lower end portion of the hollow tube 24 does not protrude from the lower end surface 20. 22 is fixed.

  As shown in FIGS. 8A, 8B, and 8C, the lower end portion of the column main reinforcement 16 embedded in the column member 12B is inserted into the hollow tube 24, and the lower end portion of the column main reinforcement 16 is , Extending to the vicinity of the center of the hollow tube 24.

  Further, a grout injection hole 38 is provided on the side surface of the sheath tube 22 so as to penetrate to the side surface of the column member 12B and allow a curing agent 34 as a filler to be described later to be injected into the sheath tube 22. A grout discharge hole 36 for discharging excess curing agent 34 to the outside is provided above.

[Junction structure of column member 12 and beam member 14]
As shown in FIG. 1, the end face 28 of the beam member 14 has a rectangular shape, and four sheath tubes 42 are embedded along the upper edge and the lower edge of the end face 28, respectively. In addition, a concave accommodating portion 44 is formed inside the sheath tube 42. The sheath tube 42 is embedded in the beam member 14 so that the end portion of the sheath tube 42 does not protrude from the end surface 28.

  Further, each of the accommodating portions 44 accommodates a cylindrical sleeve joint 46 as a joint member. Further, a beam rebar 48 as a first rebar is provided so as to connect sleeve joints 46 arranged on end surfaces 28 provided at both ends of the beam member 14, and the end of the beam rebar 48 is a sleeve joint. 46 is inserted into 46 so as not to protrude from the end face 28.

  Further, the side surface of the sheath tube 42 disposed at the end along the lower edge of the end surface 28 penetrates to the lower surface of the beam member 14, and a curing agent 34 (see FIG. 7) as a filler is contained in the sheath tube 42. A grout injection hole 50 is provided so as to enable injection. Further, at the end face 28, the side surface of the sheath tube 42 provided diagonally with respect to the sheath tube 42 provided with the grout injection hole 50 penetrates to the upper surface of the beam member 14, and an extra curing agent 34 is passed to the outside. A grout discharge hole 52 is provided for discharging to the surface.

  A sheath tube 56 is provided at the center of the beam member 14 and is inserted along the longitudinal direction of the beam member 14 and into which a PC steel wire 54 (see FIG. 5) described later is inserted. The sheath tube 56 is embedded in the beam member 14 so that the end portion of the sheath tube 56 does not protrude from the end surface 28.

  On the other hand, in the joint portion 26 of the column member 12 to which the end surface 28 of the beam member 14 is joined, a sheath tube having the same diameter as the sheath tube 42 is provided so as to face the sheath tube 42 provided on the end surface 28. 58 is embedded, and a concave insertion portion 60 is formed inside the sheath tube 58. The sheath tube 58 is embedded in the column member 12 so that the end portion of the sheath tube 58 does not protrude from the joint portion 26.

  Further, as shown in FIG. 2, the joint portions 26 are provided on both surfaces of the column member 12 that are disposed on opposite sides of each other, and connect the insertion portions 60 provided in the respective joint portions 26. Thus, the column reinforcement 62 as a 2nd reinforcement is embedded. Further, the end of the column reinforcing bar 62 is disposed so as not to protrude from the joint portion 26.

  Further, as shown in FIGS. 1 and 2, the column member 12 is provided with a sheath tube 64 having the same diameter as the sheath tube 56 so as to face the sheath tube 56 provided on the beam member 14. It is provided from the mouth part 26 to the other joint part 26.

(Action / Effect)
Next, an example of a construction method of the structure 32 using the column member 12 and the beam member 14 made of PCa will be described.

  As shown in FIGS. 10 and 11, first, a plurality (three in this embodiment) of column members 12 are erected in a row in a horizontal direction on a foundation (not shown). Further, the crane member 66 is used to lift the pillar member 12 different from the standing pillar member 12, and to the upper end face 18 of the pillar member 12 standing on the foundation, the lower end face 20 of the raised pillar member 12. (See FIG. 9).

  The position in the height direction to be joined (joining position) is different from that of the adjacent pillar member 12, and in this embodiment, the joining position of the pillar members 12 on both sides is near the second floor slab, The joining positions of the column members are the vicinity of the first floor slab and the vicinity of the third floor slab. That is, the joining positions are staggered.

  Specifically, as shown in FIG. 8A, the end of the column main reinforcement 16 protruding from the upper end surface 18 of the column member 12A is inserted into a hollow tube 24 provided on the lower end surface 20 of the column member 12B. As described above, the column member 12B is placed on the column member 12A.

  As shown in FIG. 8B, the joint portion 68 formed between the upper end surface 18 of the column member 12A and the lower end surface 20 of the column member 12B in a state where the column member 12A is placed on the column member 12B. Is closed with an air hose, a formwork or the like (not shown).

  As shown in FIG. 8C, when the curing agent 34 is injected from the grout injection hole 38 formed in the column member 12B and the sheath tube 22 is filled with the curing agent 34, the excess curing agent 34 is removed. It is discharged from the grout discharge hole 36. At this time, the curing agent 34 is also filled into the adjacent sheath tube 22 through the joint portion 68. And the filled hardening | curing agent 34 is hardened, the edge part of the column main reinforcement 16 is fixed to the hollow tube 24, and the pillar member 12B is joined to the pillar member 12A.

  Next, as shown in FIG. 10 and FIG. 11, the beam member 14 is constructed between the adjacent column members 12. The beam member 14 lifted by the crane vehicle 66 with its longitudinal direction oriented in the horizontal direction is inserted between the standing column members 12 and a predetermined position (the end face 28 and the joint portion 26 face each other). Position).

  As shown in FIG. 2 and FIG. 3, at this time, there is no member projecting outside from the end faces 28 provided at both ends of the beam member 14, and further projecting outside from the joint portion 26 of the column member 12. Since there is no member, the beam member 14 is lowered to a predetermined position without interfering with other members.

  As shown in FIG. 4, with the end face 28 of the beam member 14 facing the joint portion 26 of the column member 12, the sleeve joint 46 housed in the housing portion 44 is pulled out from the housing portion 44 by hand, It arrange | positions so that the accommodating part 44 and the insertion part 60 may be straddled. In this state, the end of the beam reinforcing bar 48 and the end of the column reinforcing bar 62 are inserted into the sleeve joint 46.

  Next, as shown in FIG. 5, the PC steel wire 54 is inserted into the sheath tube 56 and the sheath tube 64, and a tensile force is applied to the PC steel wire 54 with a jack (not shown).

  As shown in FIGS. 6 and 7, after applying tension to the PC steel wire 54, the outer peripheral portion of the joint portion 70 formed between the end face 28 of the beam member 14 and the joint portion 26 of the column member 12. Is closed with an air hose, a formwork or the like (not shown).

  Further, the curing agent 34 is injected from the grout injection hole 50 formed in the beam member 14, and the storage portion 44 and the insertion portion 60 are filled with the curing agent 34. And when the hardening | curing agent 34 is filled in the accommodating part 44 and the insertion part 60, the excess hardening | curing agent 34 will be discharged | emitted from the grout discharge hole 52. FIG. At this time, the curing agent 34 is also filled into the accommodating portion 44 and the insertion portion 60 adjacent through the joint portion 70. Then, the filled curing agent 34 is cured to fix the beam reinforcing bar 48 and the column reinforcing bar 62 to the sleeve joint 46, and the end face 28 of the beam member 14 is joined to the joint portion 26 of the column member 12.

  In this way, as shown in FIG. 11, the movement of the crane vehicle 66 is minimized, and one span of the first row (the right side shown in FIG. 11) is assembled to the top floor.

  Further, as shown in FIG. 12, the crane vehicle 66 is moved to the front side (left side shown in FIG. 12), and the first row in the first span is assembled to the top floor, and the first row in the second row is moved to the first side. Assembling the span, the first span in the first row and the first span in the second row are connected by the beam member 74.

  Next, as shown in FIG. 13, the crane 66 is further moved to the near side, and one span of the third row is assembled on the labor side of the first span of the second row, and the first span and the third row of the second row. One span of the eye is connected by a beam member 74.

  In this way, the structure 32 is constructed by a so-called folding wind construction method in which one span is sequentially built in front.

  As described above, the joint portion 26 of the column member 12 is provided with the concave insertion portion 60, and the end surface 28 of the beam member 14 is provided with the concave accommodation portion 44 that accommodates the sleeve joint 46. Yes. That is, the joint portion 26 and the end face 28 are not provided with a member or the like protruding from the joint portion 26 and the end face 28, and are flat.

  In this way, by setting the joint portion 26 and the end face 28 to be flat, the plurality of column members 12 are arranged side by side, and then the beam member 14 that maintains the posture in the horizontal state is interposed between the column members 12. Therefore, the construction of the structure 32 can be performed by the above-described folding wind method.

  In addition, since the construction by the folding wind method is possible, the heavy machinery such as the crane 66 that lifts the column member 12 and the beam member 14 is moved more frequently than the conventional construction method that sequentially builds up from the lower floor. It is possible to construct the structure 32 without performing the operation, and to further narrow the movement range of the crane vehicle 66.

  In addition, the construction using the folding wind method enables the work to be performed in parallel on multiple floors compared to the conventional construction method that builds up sequentially from the lower floors, and keeps the number of workers constant. can do.

  In addition, by arranging the joining positions of the pillar member 12 and the pillar member 12 in a staggered manner, when the structure 32 shakes due to an earthquake or the like, compared to the case where the joining positions are provided at the same position in the height direction. In addition, the load per one joint can be reduced.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in the above embodiment, the column member 12 is provided with the insertion portion 60, and the beam member 14 is provided with the accommodating portion 44 that accommodates the sleeve joint 46. An accommodating part for accommodating may be provided, and an insertion part may be provided in the beam member.

  Moreover, in the said embodiment, although the pre-stress was added to the column member 12 and the beam member 14 using the PC steel wire 54, it is not limited to this in particular, The PC steel wire 54 does not need to be used.

  In the above embodiment, although not particularly mentioned, when an unbonded region in which the adhesion strength of the hardener 34 is zero (unbonded state) is provided in the beam reinforcing bar 48 and when tension is applied to the beam reinforcing bar 48 due to an earthquake or the like, The seismic energy may be absorbed by positively yielding the beam reinforcement 48 in the unbonded region.

DESCRIPTION OF SYMBOLS 10 Joining structure 12 Column member 14 Beam member 26 Joint part 28 End surface 32 Structure 34 Hardener (filler)
44 Housing part 46 Sleeve joint 48 Beam rebar (1st rebar)
60 Insertion part 62 Column reinforcement (second reinforcement)

Claims (4)

Column members made of precast concrete;
A beam member made of precast concrete, the end face of which is joined to the column joint of the column member;
An insertion part that is provided on one of the end face or the column joint part, and is formed by making a part of the end face or the column joint part concave;
A receiving portion that is provided on the end face or the column fitting portion where the insertion portion is not provided, and is formed by making a part of the end face or the column fitting portion concave;
A joint member that is housed in the housing part, pulled out from the housing part when joining the column mouth part and the end surface, and disposed so as to straddle the housing part and the insertion part;
In a state where the joint member is disposed so as to straddle the housing portion and the insertion portion, the insertion portion and the housing portion are filled, and the joint member is fixed to the end surface and the column mouth portion. A filler,
A joint structure of precast concrete members with The joint member is a cylindrical sleeve joint,
A first rebar that is provided in the column member or the beam member having a housing portion in which the sleeve joint is housed, and whose end is inserted into the sleeve joint and does not protrude from the column joint or the end surface. When,
An end portion is inserted into the sleeve joint that is provided inside the column member or the beam member provided with the insertion portion and is arranged to straddle the storage portion and the insertion portion, and the column joint A second rebar that does not protrude from the end portion or the end surface;
The joint structure of the precast concrete member of Claim 1 provided with these.   The structure provided with the joining structure of the precast concrete member of Claim 1 or 2. A construction method for constructing a structure using the joint structure of precast concrete members according to claim 1,
A step of arranging the column members in a row in a horizontal direction;
A step of arranging a beam member between the column members arranged in one row, and facing a column mouth portion of the column member and an end surface of the beam member;
The step of arranging the joint member so that the joint member is pulled out from the housing portion and straddles the housing portion and the insertion portion in a state where the column mouth portion and the end face are opposed to each other.
In the state where the joint member straddles the housing portion and the insertion portion, the housing portion and the insertion portion are filled with a filler, and the joint member is fixed to the end surface and the column mouth portion. When,
Construction method of the structure with

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