JP6518510B2 - Hole forming jig, and method of constructing vibration control stud structure - Google Patents

Description

  In the present invention, a hole is formed in a concrete body in order to fix a seismic control stud provided between a beam on the floor and a beam on the lower floor or a beam on the upper floor to the beam via a PC steel rod or the like. The present invention relates to a hole forming jig and a hole forming method to be formed.

Conventionally, a hole is formed in a concrete body by driving in a sheath pipe at the time of casting concrete (see Patent Document 1).
In this patent document 1, a sheath tube attachment piece (attachment member 5) is attached to a formwork, and a bolt is attached to the sheath tube attachment piece. Then, the bolt is inserted into the sheath tube, and the distal end side of the bolt is screwed to the distal end side of the sheath tube. Thus, the sheath tube is attached at a predetermined position by being pinched from both ends by the sheath tube attachment piece and the distal end side of the bolt.

JP 2012-255252 A

However, in the above-mentioned patent document 1, the gap between the inner circumferential surface of the sheath tube and the outer circumferential surface of the bolt is large, and even when the reinforcing bar abuts on the sheath tube during reinforcement, even if the bolt does not shift. The sheath tube may be displaced or deformed.
In addition, at the time of placing concrete, a concrete hose may collide with the sheath tube, or the sheath tube may be pushed by the side pressure of the concrete, and the sheath tube may be displaced or deformed. As a result, it may be difficult to secure the vertical accuracy and the position accuracy of the hole.

The present invention is a method for forming a hole forming jig capable of forming a hole in a concrete body with high accuracy by driving a cylindrical member such as a sheath tube into concrete while preventing displacement and deformation , and a method of constructing a damping stud structure Intended to provide.

  The present inventor inserts a steel pipe (gas pipe) inside a sheath pipe as a beam penetration type sheath pipe holding metal for fixing a seismic control stud to an RC beam, and adjusts the installation height of the sheath pipe In order to do so, a sheath joint that exceeds the size of the sheath tube is used in the outer diameter portion of the sheath tube. The flange portion is provided in the steel pipe and fixed in position, and the pipe head portion of the steel pipe is disposed through the hole of the flat positioning template, thereby arranging the main beam of the beam in the RC beam cross section. This invention has led to the invention of a beam-through type sheathed tube metal that can ensure the position of the sheathed tube without causing displacement even if it collides with the sheathed tube.

  The feature of the present invention is that a hole forming jig (sheath pipe) for forming a hole penetrating up and down in the cross section of the concrete beam is a double pipe structure, and the outer pipe is a flat positioning pipe material, and a core member It is a jig which forms a hole with sufficient accuracy in a concrete beam, and its hole formation method by securing a vertical accuracy of a hole by securing a non-adhesion field between a core member and concrete. .

  The hole forming jig according to the first invention (for example, the hole forming jig 50 described later) has a hole (for example, the hole 13 described later) penetrating vertically in a beam (for example, a beam 10 described later) A hole forming jig for forming, which is disposed at the upper end of the beam form frame, and a rod-like member (for example, a rod-like member 51 described later) extending in the vertical direction and disposed inside the beam form frame And a positioning template (for example, positioning template 52 described later) for positioning the rod-like member in the horizontal direction, and the rod-like member is inserted into a through hole (for example, through hole 58 described later) of the positioning template A hooking portion (for example, a hooking portion 56 described later) provided on an outer peripheral surface of the rod-like member locks the positioning template.

  The hole forming jig according to the second invention (for example, the hole forming jig 50 described later) is a hole forming jig for forming a hole penetrating vertically in the beam, and extends in the vertical direction to be a beam A rod-like member disposed inside the mold, and a positioning template disposed at the upper end of the beam mold and having a through hole (for example, a through hole 58 described later) formed therein through which the rod-like member is inserted The rod-like member includes a cylindrical tubular member (for example, a sheath tube 12 described later) and a core member (for example, a core member 54 described later) inserted into the cylindrical member, and the core member A rod-shaped core member main body (for example, core member main body 55 described later) having an inner diameter larger than the outer diameter of a connection member (for example, PC steel rod 41 described later) inserted later, and the core member main body Buttocks formed on top of the base and larger than the inner diameter of the through hole of the positioning template For example, a later flange portion 56 of) the core member body upper portion hanging hook provided on (e.g., characterized in that it comprises a and a hanging hook 57) described later.

  The hole forming jig according to the third invention (for example, the hole forming jig 50A described later) is a hole forming jig for forming a hole penetrating vertically in the beam, and extends in the vertical direction to be a beam The rod-like member is disposed inside the formwork, and the rod-like member is a tubular member (for example, a sheath tube 12 described later) and a core member inserted into the tubular member (for example, a core member described later) 54), and the core member is a rod-like core member main body (for example, described later) having an inner diameter larger than the outer diameter of a connection member (for example, a PC steel rod 41 described later) inserted later. A core member body 55), a collar portion (for example, collar portion 56 described later) formed on the upper portion of the core member main body and larger than the inner diameter of the cylindrical member, and a suspension provided on the upper end portion of the core member main body And a hook (for example, a hanging hook 57 described later).

  According to the present invention, the core member having an inner diameter larger than the outer diameter of the coupling member to be inserted later is inserted into the cylindrical member, and in this state, the core member is disposed inside the beam formwork. Therefore, since the gap between the cylindrical member and the core member is small, when arranging reinforcing bars in the beam formwork, the cylindrical member is supported from the inside by the core member even if the reinforcing material abuts the cylindrical member, and the cylindrical member Misalignment and deformation can be prevented. Further, even when the concrete hose collides with the cylindrical member or the cylindrical member is pushed by the side pressure of the concrete at the time of placing the concrete, it is possible to prevent the positional deviation and the deformation of the cylindrical member. Therefore, the hole can be formed in the concrete body with high accuracy.

For the hole that penetrates up and down in the beam cross section, place a rod-like member at the hole position before inserting concrete in the beam part, and insert the upper end of the rod-like member into the hole provided in the positioning template By locking the rod-like member to the positioning template, the planar positioning of the hole can be performed.
In addition, since the hanging hook is provided on the core member, the operator can easily insert the inside of the cylindrical member or pull it out of the cylindrical member by holding and pulling up the hanging hook of the rod-like member. Can.
Moreover, since the collar portion is provided on the core member, it is possible to prevent the core member from falling below the cylindrical member.

  In the hole forming jig according to the fourth aspect of the present invention, a shock absorbing stud (for example, a shock absorbing stud 30 described later) is disposed on the upper surface and / or the lower surface of the beam, and a base plate (for example, the shock absorbing stud) A mortar or grout material is filled between a base plate 32A, 32B) described later and the end of the cylindrical member.

  According to the present invention, since the mortar or grout material is filled between the base plate of the vibration control stud and the end of the cylinder member, the cylinder member can be provided with a predetermined hole by hardening the filled mortar or grout material. It can be provided in position. In addition, since the holes are formed at predetermined positions, the installation of the seismic control studs can be securely fixed.

  A hole forming method according to a fifth aspect of the present invention is a hole forming method for forming a hole in a beam using the above-mentioned hole forming jig, and a beam form (for example, a half PC beam 11 described later) Attaching the hole forming jig to the beam forming step (for example, steps S1 and S2 described later) and a step of placing concrete on the beam form (for example, steps S3 and S4 described later) I assume.

  According to the present invention, it is possible to construct a concrete beam provided with a hole at which horizontal accuracy and vertical accuracy are secured at a predetermined position in the cross section of the beam. Moreover, a connection member can be inserted in the hole which penetrates the inside of a beam cross section up and down, and the damping stud provided in the beam upper surface can be fixed via the connection member.

  According to the present invention, by inserting a cylindrical member such as a sheath tube into concrete while preventing displacement and deformation, it is possible to form a hole in the concrete body with high accuracy.

It is a perspective view of a hole formation jig concerning a 1st embodiment of the present invention. It is a perspective view which shows the structure of the sheath pipe | tube of the hole formation jig which concerns on the said embodiment. It is a perspective view of a hole formation jig concerning a 2nd embodiment of the present invention. It is a longitudinal cross-sectional view of the building (shock control stud) to which the hole formation jig and the hole formation method concerning a 3rd embodiment of the present invention were applied. It is a beam longitudinal cross-sectional view (The enlarged view of the part enclosed with the broken line of FIG. 3) at the time of using a hole formation jig. It is a flowchart of the construction method of the seismic control stud using a hole formation jig. Control using a hole formation jig. It is explanatory drawing (the 1) of the construction procedure of a quake pillar. It is explanatory drawing (the 2) of a construction procedure of the seismic control stud using a hole formation jig. It is explanatory drawing (the 3) of the construction procedure of the seismic control stud using a hole formation jig. It is explanatory drawing (the 4) of the construction procedure of the seismic control stud using a hole formation jig.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the embodiments below, the same components will be denoted by the same reference numerals, and the description thereof will be omitted or simplified. In the present specification, as an application example of the hole forming jig and the hole forming method of the present invention, a building provided with a seismic control stud has been described.
Hereinafter, an embodiment of the hole forming jig and a method for forming the hole will be described.

First Embodiment
The hole forming jig according to the first embodiment of the present invention is a hole forming jig provided with a rod-like member 51 penetrating in the vertical direction in the cross section of the beam and a positioning template 52 for planarly positioning the bar-like member 51. 50. In order to lock the rod-like member 51 in the through hole 58 of the positioning template 52, the rod-like member 51 is provided with a collar 56 on the outer peripheral surface. The rod-like member 51 has a double tube structure, and is constituted by a cylindrical sheath tube 12 which is an outer tube, and a core member 54 inserted inside the sheath tube 12, and the core member 54 is suspended at the upper end. A hook 57 is provided.

  Specifically, as shown in FIG. 1, the hole forming jig 50 is disposed at the upper end of the rod member 51 extending in the vertical direction and disposed inside the half PC beam 11 and at the upper end of the half PC beam 11. And a positioning template 52 formed with a plurality of through holes 58 through which the rod-like member 51 is inserted. The positioning template 52 performs planar positioning of the rod-like member 51.

The rod-like member 51 includes a sheath tube 12 as a cylindrical tube member and a core member 54 inserted in the sheath tube 12. The sheath tube 12 is, for example, a vinyl chloride tube or a spiral sheath.
As shown in FIG. 2 (a), a sheath joint 17 larger than the outer diameter of the sheath tube 12 is attached to the upper end of the sheath tube 12, and as shown in FIG. 2 (b) The height of the sheath tube 12 can be adjusted by moving the tube 12 in the vertical direction.

  The core member 54 includes a rod-shaped core member main body 55, a hook portion 56 formed on the upper portion of the core member main body 55, and a suspension hook 57 provided on the upper end portion of the core member main body 55. The collar portion 56 is a height position fixing means of the core member main body 55. The suspension hooks 57 are welded to the upper end portion of the core member main body 55 by turning the U bolt upside down.

The core member main body 55 is, for example, a steel pipe for piping (gas pipe) or a solid rod-like material. The outer diameter of the core member body 55 is slightly smaller than the inner diameter of the sheath tube 12 so that the core member body 55 can be easily inserted into and removed from the sheath tube 12. The core member main body 55 is higher in rigidity than the sheath tube 12 and has a length up to the lower end of the sheath tube.
The collar portion 56 is larger than the inner diameter of the sheath tube 12 and the inner diameter of the through hole 58 of the positioning template 52, and is welded and fixed to the core member main body 55. The flange portion 56 is preferably an off-the-shelf steel material such as a washer.

The rod-like member 51 is constituted by a cylindrical sheath tube 12 and a core member 54 inserted into the sheath tube 12, and the core member 54 is a connection member 40 (for example, PC steel rod 41) inserted later. And a bar-like core member main body 55 having an outer diameter larger than the outer diameter of the reinforcing bar, and a flange portion 56 formed on the head of the core member main body 55 and larger than the inner diameter of the through hole 58 of the positioning template 52 And a suspension hook 57 provided at the upper end portion of the core member main body 55. Specifically, the outer diameter of the core member body 55 is preferably smaller than the inner diameter of the sheath tube 12, and the gap between the core member body 55 and the sheath tube 12 is preferably 10 mm or less. Further, it is preferable that the core member main body 55 be higher in rigidity than the cylindrical member.

The core member 54 is inserted into the through hole 58 of the positioning template 52, and is engaged with the through hole 58 of the positioning template 52 by a collar portion 56 provided on the outer peripheral surface of the core member 54.
In addition, the sheath tube 12 is to be placed in a concrete beam, and after the core member 54 casts the concrete in the beam portion, the core member 54 is pulled upward and reused. Therefore, the core member 54 is preferably a lightweight steel pipe having high rigidity and performance.

According to the present embodiment, the following effects can be obtained.
(1) The hole formed in the cross section of the beam arranges the sheath tube 12 of the outer tube having a double tube structure in the formwork and provides the core member 54 inside the sheath tube 12 and the core member 54 With concrete inserted into the through hole 58 of the positioning template 52 and the core member 54 being engaged with the positioning template 52, concrete is cast in the form of the beam, so both the plane positioning accuracy and the vertical accuracy of the hole The predetermined accuracy can be secured.

  (2) The core member 54 has a small gap between the outer peripheral surface of the core member main body 55 and the inner peripheral surface of the sheath tube 12 and is a higher rigidity material than the sheath tube 12. Even when the side pressure of the concrete acts on the sheath tube 12 at this time or the sheath tube 12, displacement and deformation of the sheath tube 12 can be prevented.

Second Embodiment
According to the second embodiment of the hole forming jig of the present invention, a rod-like member 51 (a double-layered member composed of a cylindrical sheath tube 12 which is an outer tube and a core member 54 inserted inside the sheath tube 12) Tube structure) is disposed in the cross section of the beam to form a hole in the cross section of the beam. In the hole forming jig 50 </ b> A, the core member 54 provided with the collar 56 on the outer peripheral surface is locked to the sheath tube 12. The core member 54 and the sheath tube (cylindrical member) 12 are the same as those in the first embodiment in that they are not described in particular again.

  The hole forming jig 50A, as shown in FIG. 3, first fixes the sheath tube 12 to the main beam bars and shear reinforcing bars in the cross section of the beam using binding wires, and thereafter, the core member 54 having the ridges 56. The sheath tube 12 is inserted into the sheath tube 12, and the flange portion 56 of the core member 54 is engaged with the outermost peripheral portion of the sheath tube 12.

According to the present embodiment, the following effects can be obtained.
(1) Using the hole forming jig 50A which is a double pipe structure of the cylindrical sheath tube 12 and the core member 54 provided with the flange portion 56 on the outer peripheral surface, the hole passing through the beam cross section Since the hole is formed, the hole can be constructed simply and accurately.
(2) The sheath tube 12 and the core member 54 can be made of commercially available products and can be manufactured at low cost.

Third Embodiment
Fig.4 (a) is a longitudinal cross-sectional view of the building 1 in which the hole was formed by the hole formation method which concerns on one Embodiment of this invention. FIG.4 (b) is AA sectional drawing of Fig.4 (a). FIG. 5 is a longitudinal cross-sectional view of the beam when the hole forming jig is used, and is an enlarged view of a portion surrounded by a broken line in FIG.

Hereinafter, the construction procedure of a building (for example, seismic control column) using the hole forming jig will be specifically described.
First, the present invention will be described with respect to a beam-column structure of a building (FIG. 4, FIG. 5) using a hole formed in a beam cross section.

  The building 1 is a reinforced concrete rigid frame structure, and includes columns, beams 10, and a floor 20, which are not shown. On each floor of the building 1, seismic control studs 30 are provided between the upper and lower beams 10, and the seismic control studs 30 located at the upper and lower positions are connected by a plurality of connecting members 40.

The seismic control stud 30 includes a vertically extending steel column body 31 and base plates 32A and 32B provided at the upper and lower ends of the column body. A plurality of through holes 33 are formed in the base plates 32A and 32B.
A non-shrinkage grout material 34 is filled in the gap between the lower base plate 32A of the vibration control stud 30 and the upper surface of the beam 10 and the gap between the upper base plate 32B and the lower surface of the beam 10.

The beam 10 is constructed using a half precast concrete beam (hereinafter, referred to as a half PC beam) 11. A cylindrical sheath tube 12 extending in the vertical direction is driven into the beam 10, whereby a plurality of holes 13 penetrating the beam 10 in the vertical direction are formed.
The floor 20 is constructed using a half precast concrete floor (hereinafter referred to as a half PC floor) 21.

The connecting member 40 includes a PC steel rod 41 inserted through the hole 13 of the beam 10 and the through hole 33 of the seismic control stud 30, and a nut 42 screwed to the upper and lower ends of the PC steel rod 41.
The PC steel rod 41 is not fixed to the inner wall surface of the hole 13 (unbonded), and tension is introduced to the PC steel rod 41.

Hereinafter, a method of constructing a seismic control stud using a hole forming jig will be described with reference to the flowchart of FIG.
As shown in FIG. 7, in the front stage (early stage) of forming the hole in the concrete beam of the floor, the support floor 60 of the lower floor is assembled on the bottom surface of the floor of the floor, and State of being built.

  In step S1, as shown in FIGS. 7 and 8, the half PC beam 11 and the half PC floor 21 are set on the support 60. The half PC beam 11 is a reinforced concrete member in which the lower beam main bars 14 and the ribs 15 are driven. The half PC floor 21 is a reinforced concrete member into which a lower main reinforcement not shown is driven.

  In step S2, as shown in FIG. 8, the hole forming jig 50 is set on the half PC beam 11. As shown in FIG. 1, the hole forming jig 50 includes a plurality of rod-like members 51 and a positioning template 52 in which a plurality of through holes 58 into which the rod-like members 51 are inserted are formed. Hole formation jig 50 of FIG. In addition, as shown in FIG. 3, you may use hole formation jig 50A of 2nd Embodiment by the rod-shaped member 51 comprised with the sheath pipe | tube 12 and the core member 54. As shown in FIG.

In step S3, as shown in FIG. 8, reinforcement of the beam 10 and the floor 20 is performed. That is, the upper beam main bars 16 of the beam 10 are arranged on the half PC beam 11, and the upper main bars (not shown) of the floor 20 are arranged on the half PC floor 21.
Here, since the hole forming jig 50 is already set on the half PC beam 11, a space for forming the hole 13 is already secured at the time of arranging bars.

  In step S4, as shown in FIG. 9, concrete of the beam 10 and the floor 20 is cast. Concretely, concrete C is poured onto the half PC beam 11 and the half PC floor 21. At this time, in order to level the upper surface of the beam 10, after the casting of the concrete is completed and the sheath tube 12 is positioned, the positioning template 52 is appropriately removed. After the positioning template 52 is removed, the collar 56 of the core member 54 is locked to the upper end of the sheath tube 12.

In step S5, after completion pouring concrete, the operator, by pulling up grip the hanging hooks 57 of the core member 54, withdrawn core member 54 from the sheath tube 12.
In step S6, as shown in FIG. 10, the seismic control stud 30 of the current floor is constructed on the beam 10, and the support 60 of the current floor is assembled.
In step S7, the above-mentioned steps S1 to S6 are repeated to build the building 1 from the lower layer toward the upper layer.

In step S8, a non-shrinkage grout material is filled in the gap between the lower base plate 32A of the seismic control stud 30 of each floor and the upper surface of the beam 10 and the gap between the upper base plate 32B and the lower surface of the beam 10. That is, the non-shrinkage grout material is filled between the base plates 32A, 32B of the seismic control stud 30 and the upper and lower ends of the sheath tube 12.
In step S9, the connecting member 40 is attached to the seismic control stud 30 of each floor.

According to the present embodiment, the following effects can be obtained.
(1) The core member 54 is inserted into the sheath tube 12 and placed on the half PC beam 11 in this state. Therefore, since the gap between the sheath tube 12 and the core member 54 is small, even when reinforcing bars such as the upper beam main bars 16 collide with the sheath tube 12 when arranging the reinforcing bars on the half PC beam 11, the sheath tube The core member 12 is supported from the inside by the core member 54 to prevent the sheath tube 12 from being displaced or deformed. In addition, even when the concrete hose collides with the sheath tube 12 or the sheath tube 12 is pushed by the side pressure of the concrete at the time of placing the concrete, it is possible to prevent the displacement and the deformation of the sheath tube 12. Therefore, the hole 13 can be formed in the reinforced concrete beam 10 with high accuracy.

  (2) The seismic control stud 30 installed between the lower floor beam 10 and the corresponding floor beam 10 uses the hole forming jig 50 to form a hole 13 penetrating vertically through the beam cross section After that, the connecting member 40 (PC steel rod 41 or reinforcing bar) was inserted into the hole 13 and fixed with a predetermined tension. The hole 13 provided in the cross section of the beam is the hole 13 for allowing the connecting member 40 which is a structural steel material to penetrate, and by using the hole forming jig 50 to secure both the plane positioning accuracy and the vertical accuracy. The seismic control stud 30 can be installed with high accuracy.

  (3) Since the non-shrink grout material is filled between the base plates 32A and 32B of the seismic control stud 30 and the upper and lower ends of the sheath tube 12, the hardened grout material hardens, thereby constructing the seismic control stud 30 Can be fixed securely.

The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like as long as the object of the present invention can be achieved are included in the present invention.
For example, in the present embodiment, although the core member main body 55 is set to the length to the lower end of the sheath tube 12, the present invention is not limited to this. The through holes 33 may be inserted.

  Further, in the above embodiment, the rod-like member 51 is disposed to vertically penetrate the cross section of the beam and the hole 13 is formed. However, the rod-like member is disposed to horizontally penetrate the cross section of the column You may form a part. In the column member, a hole penetrating through the cross section of the column in the horizontal direction can be used as a hole into which PC steel is inserted when the reinforcing member installed in the column and beam frame is fixed to the column. In the above embodiment, the hole forming jigs 50 and 50A are installed on the half PC beam, but the present invention is not limited to this. It is also good.

DESCRIPTION OF SYMBOLS 1 ... Building 10 ... Beam 11 ... Half PC beam 12 ... Sheath pipe | tube (tube member) 13 ... Hole part 14 ... Lower side beam main line 15 ... Riblet 16 ... Upper side beam main line 17 ... Sheath joint 20 ... Floor 21 ... Half PC floor Reference Signs List 30 vibration control stud 31 pillar main body 32A lower base plate 32B upper base plate 33 through hole 34 non-shrink grout 40 connecting member 41 PC steel rod 42 nut 50, 50 A hole forming jig 51 ... bar member 52 ... positioning template 54 ... core member 55 ... core member main body 56 ... ridge portion 57 ... suspension hook 58 ... through hole 60 ... support

Claims (2)

A hole forming jig for forming a hole penetrating vertically in a beam, wherein
A rod-like member extending in the vertical direction and disposed inside the beam formwork;
The rod-like member has a cylindrical cylindrical member formed of a spiral sheath, and a core member inserted into the cylindrical member.
At an upper end portion of the cylindrical member, a sheath joint which is for adjusting the height of the cylindrical member and which exceeds the outer diameter of the cylindrical member is attached.
The core member is a rod-like core member main body having an outer diameter larger than the outer diameter of the connecting member to be inserted later, and a flange portion formed on the upper portion of the core member main body and larger than the inner diameter of the cylindrical member. And a suspension hook provided at the upper end of the core member body ,
A hole forming jig characterized in that a collar portion of the core member is engaged with the uppermost end of the cylindrical member . An upper floor provided on a lower floor of a damping stud, a concrete beam provided on the lower floor, and a position directly above the lower stud. And a method of constructing a damping stud structure comprising:
Placing a reinforced concrete half PC beam with lower main beam bars and ribbed bars driven onto said damping studs of said lower floor,
A rod-shaped member disposed inside the beam-type frame extending in the vertical direction, are arranged at the upper end of the beam-type frame, a positioning template through-hole in which the rod-like member is inserted is formed, Ru with a hole A part forming jig is prepared, and the rod-like member has a cylindrical cylindrical member and a core member inserted into the cylindrical member, and the core member is an outer diameter of a connecting member to be inserted later. A rod-shaped core member main body having a larger outer diameter , a flange portion formed on the upper portion of the core member main body and larger than the inner diameter of the through hole of the positioning template, and provided at the upper end portion of the core member main body Mounting the hole forming jig on the half PC beam;
Arranging the upper beam main bars of the half PC beam;
Placing concrete on the half PC beam to construct the concrete beam and forming a hole in the concrete beam;
A process of pulling up the suspension hook of the core member of the hole forming jig and removing the core member;
Constructing a damping stud of the upper floor on the concrete beam;
And D. inserting the connecting member into the hole of the concrete beam and connecting the damping stud of the lower floor and the damping stud of the upper floor with the connecting member. How to build a structure.

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