JP2008144526A - Reinforcement anchoring structure, reinforcement anchoring method, pc member joining structure and pc member joining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforcement anchoring structure in an end part of a PC member, capable of easily performing filling work of a grout material, without reducing structural yield strength. <P>SOLUTION: This anchoring structure 10 has a screw line member 13 joined to an opening side end part of a column main reinforcement 11 and forming a screw line on an outer peripheral surface, and an anchoring member 12 having a hole part forming a screw line on an inner peripheral surface, installed in the screw line member 13 by threadedly engaging this hole part with the outer periphery of the screw line member 13 and abutting on a member surface of the PC member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reinforcing bar fixing structure and a reinforcing bar fixing method at an end portion of a precast concrete member.

  In recent years, a method of constructing an RC structure using a PC member has been used to shorten the construction period. As a construction method using such a PC member, for example, in Patent Document 1, as shown in FIG. 12 of the same document, a joint and a beam portion are integrally formed, and a sheath tube is embedded at a position corresponding to a column main reinforcement. The PC beam / joint member is built on the upper part of the lower PC column member with the sleeve joint on the column head, and the upper PC column member with the column main bar protruding from the lower surface is the PC beam member. -A construction method that constructs a column beam structure by penetrating the sheath tube of the joint member so as to reach the sleeve joint of the lower PC column member and filling the sheath tube and sleeve joint with grout material Is described.

  By the way, when the column beam structure is constructed using the PC member in this way, in the joint portion on the uppermost floor, the PC column member is not connected to the upper side, and there is no column main bar connected to the upper side. It is necessary to provide a fixing structure so that the load is transmitted between the reinforcing bar and the concrete at the upper end of the column main bar. As such a fixing structure, a method using a plate nut (fixing nut) used for a fixing structure in a general reinforced concrete structure is conceivable.

  When plate nuts are used in this way, screw rebars are used for the multiple column main bars of the top floor joint, and rattling and loosening between the plate nuts and screw rebars are prevented. It must be filled with grout material. However, if the screw rebar is screwed into the plate nut, the grout material cannot be reliably filled into the plate nut, so it is necessary to inject the grout material into the plate nut before inserting the screw rebar. . However, since a large number of plate nuts corresponding to each screw rebar are provided, it takes a very large amount of time to inject the grout material into each of the plate nuts.

Therefore, for example, Patent Document 2 describes a method in which a groove is provided on the outer peripheral surface of a screw reinforcing bar used as a column main reinforcing bar. According to this method, the grout material filled in each sheath tube is filled into the plate nut through this groove, so that the grout material filling operation can be performed in a lump.
JP 2004-278257 A JP 2006-104854 A

  However, if grooves are provided in the reinforcing bars in this way, cross-sectional defects occur in the reinforcing bars, and the required structural strength may not be exhibited.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a reinforcing bar fixing structure at the end of a PC member that can easily perform grout material filling work without reducing structural strength. It is to be.

In the reinforcing bar fixing structure of the present invention, the reinforcing bar is inserted into a reinforcing bar insertion hole that opens in the bottom surface of the recess provided on the surface of the PC member, and a grout material is filled between the reinforcing bar insertion hole and the reinforcing bar. A fixing structure for fixing the opening side end portion of the reinforcing bar to the PC member, the screw member being joined to the opening side end portion of the reinforcing bar and having a thread formed on the outer peripheral surface; And a fixing member attached to the screw member by screwing the hole with an outer periphery of the screw member. .
The end portion of the reinforcing bar insertion hole includes a case where concrete is placed in the concave portion after the fixing structure is constructed. In short, the vicinity of the opening of the reinforcing bar insertion hole to the bottom surface of the recess corresponds to the end of the reinforcing bar insertion hole.

  In the reinforcing bar fixing structure of the present invention, the screw reinforcing bar is inserted into a reinforcing bar insertion hole that opens in the bottom surface of the recess provided on the surface of the PC member, and the grout material is interposed between the reinforcing bar insertion hole and the screw reinforcing bar. And fixing the opening side end of the screw rebar to the PC member, comprising a collar-like fixing portion extending outward, and a through hole, A fixing member embedded in an end portion of the reinforcing bar insertion hole of the PC member so as to be exposed at a bottom surface of the concave portion, and exposed to a bottom surface of the concave portion of the PC member of the fixing member; A first lock nut that is embedded in the reinforcing bar insertion hole of the PC member so as to abut on the opposite side of the PC member and is screwed with the screw reinforcing bar, and is exposed on the bottom surface of the concave portion of the PC member of the fixing member. A second portion that abuts against the threaded side and engages with the threaded reinforcing bar. Characterized in that it comprises a lock nut, a.

  In the reinforcing bar fixing structure of the present invention, the screw reinforcing bar is inserted into a reinforcing bar insertion hole that opens in the bottom surface of the recess provided on the surface of the PC member, and the grout material is interposed between the reinforcing bar insertion hole and the screw reinforcing bar. And fixing the opening side end of the screw rebar to the PC member, the fixing structure having a through hole through which the screw rebar is inserted and contacting the bottom surface of the concave portion of the PC member And a lock nut that engages with the screw rebar so as to abut on a surface of the fixing plate that is opposite to a surface that abuts on the bottom surface of the concave portion of the PC member.

  In the reinforcing bar fixing method of the present invention, the reinforcing bar is inserted into a reinforcing bar insertion hole that opens in the bottom surface of the recess provided in the PC member, and a grout material is filled between the reinforcing bar insertion hole and the reinforcing bar. A fixing method for fixing an opening-side end portion of the reinforcing bar to the PC member, wherein a screw member having a thread formed on an outer peripheral surface is joined to a tip of the reinforcing bar, and a screw thread is connected to the inner peripheral surface. A fixing member having a hole formed therein is attached to the screw member by screwing the hole into the outer periphery of the screw member, and the reinforcing bar is inserted into the reinforcing bar insertion hole. .

  In the reinforcing bar fixing method of the present invention, the threaded reinforcing bar is inserted into the reinforcing bar insertion hole that opens in the bottom surface of the recess provided in the PC member, and a grout material is filled between the reinforcing bar insertion hole and the threaded reinforcing bar. A fixing method for fixing the opening-side end of the screw rebar to the PC member, the fixing member including a collar-shaped fixing portion extending outward and a through-hole, The first lock nut is embedded on the end of the reinforcing bar insertion hole of the PC member so as to be exposed on the bottom surface of the concave portion of the member, and the first lock nut is exposed on the bottom surface of the concave portion of the PC member of the fixing member. The reinforcing bar is embedded in the reinforcing bar insertion hole of the PC member so as to abut the opposite side of the PC member, and the threaded reinforcing bar is inserted into the through hole of the fixing member and screwed into the first lock nut. The second lock nut is inserted into the insertion hole, and the fixing member Characterized in that screwed into the threaded rebar so as to abut on the side exposed on the bottom surface of the recess of the PC member.

  In the reinforcing bar fixing method of the present invention, the threaded reinforcing bar is inserted into the reinforcing bar insertion hole that opens in the bottom surface of the recess provided in the PC member, and a grout material is filled between the reinforcing bar insertion hole and the threaded reinforcing bar. A fixing method for fixing the opening side end of the screw rebar to the PC member, wherein the PC member is inserted into a fixing plate having a through hole so that the screw rebar is inserted through the through hole. The lock nut is screwed into the threaded reinforcing bar so as to abut the surface of the fixing plate on the side opposite to the surface of the fixing member contacting the bottom surface of the recess. It is characterized by that.

  In addition, the PC member joining structure of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end face, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. A reinforcing bar inserted into the reinforcing bar insertion hole so that one end reaches the inside of the mechanical joint, and a screw member joined to the other end of the reinforcing bar and having a thread formed on the outer peripheral surface thereof. A fixing member attached to the screw member by screwing the hole with an outer periphery of the screw member, and an inner portion of the mechanical joint. , Joints between the first PC member and the second PC member, and the reinforcing bar and the reinforcing bar insertion Characterized in that it comprises a grout material filled in the gap between the hole and.

  In addition, the PC member joining structure of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end face, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. A threaded reinforcing bar inserted into the reinforcing bar insertion hole so that the tip reaches the mechanical joint and having a thread formed on the outer peripheral surface, a collar-shaped fixing part extending outward, and a through hole, A fixing member embedded in an end portion of the reinforcing bar insertion hole of the first PC member so as to be exposed at the bottom surface of the concave portion of the first PC member, and the screw reinforcing bar being inserted into the through hole, What is the side exposed to the bottom surface of the concave portion of the first PC member of the fixing member? A first lock nut embedded in the reinforcing bar insertion hole of the first PC member so as to be in contact with the opposite side, and screwed with the screw reinforcing bar; and a bottom surface of a recess of the first PC member of the fixing member A second lock nut that is in contact with the exposed side of the screw and is screwed into the threaded reinforcing bar, a joint between the first PC member and the second PC member in the mechanical joint, and the reinforcing bar. And a grout material filled in a gap with the reinforcing bar insertion hole.

In addition, the PC member joining structure of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end face, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. A screw rebar inserted through the reinforcing bar insertion hole so that the tip reaches the mechanical joint and having a thread formed on an outer peripheral surface; and a through hole through which the screw rebar is inserted; The fixing plate is in contact with the bottom surface of the concave portion of the PC member, and is fastened to the screw rebar so as to be in contact with the surface of the fixing plate opposite to the surface of the first PC member that is in contact with the bottom surface of the concave portion. Lock nut, and in the mechanical joint, the first PC portion Characterized by comprising the and a grout material filled in the gap between joint, and the reinforcing bars and the reinforcing bar insertion hole between the second PC member.
In the PC member joining structure, the first PC member may include a grout discharge hole that connects the reinforcing bar insertion hole and the surface of the first PC member.

  In addition, the PC member joining method of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end surface, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. Then, a screw member having a thread formed on the outer peripheral surface is joined to one end of the reinforcing bar, and a fixing member having a hole formed with a screw on the inner peripheral surface is connected to the outer periphery of the screw member. It is attached to the screw member by being screwed to the reinforcing member, and the reinforcing bar is inserted into the reinforcing bar insertion hole so that the other end reaches the inside of the mechanical joint, and the first PC member is inserted into the mechanical joint. In the joint between the second PC member and the gap between the reinforcing bar and the reinforcing bar insertion hole Characterized by filling the Rout material.

  In addition, the PC member joining method of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end surface, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. The reinforcing member insertion hole of the first PC member is exposed to the bottom surface of the concave portion of the first PC member with a fixing member having a collar-shaped fixing portion extending outward and a through hole. Embedded in the end portion of the first PC member, and the first lock nut is in contact with the opposite side of the fixing member to the side exposed on the bottom surface of the concave portion of the first PC member. A screw rebar embedded in a rebar insertion hole and having a thread formed on the outer peripheral surface is connected to the fixing member. The through hole is inserted, screwed into the first lock nut, and inserted through the reinforcing bar insertion hole so that the tip reaches the inside of the mechanical joint, and the second lock nut is inserted into the fixing member. The screw joint is screwed into the threaded reinforcing bar so as to come into contact with the exposed side of the bottom surface of the recess of the first PC member, and the joint between the first PC member and the second PC member in the mechanical joint. And a grout material is filled in a gap between the reinforcing bar and the reinforcing bar insertion hole.

  In addition, the PC member joining method of the present invention is connected to the first PC member including a reinforcing bar insertion hole that penetrates the member, and a concave portion in which the reinforcing bar insertion hole is opened on the bottom surface, the main reinforcement, and the main reinforcement. A mechanical joint having an opening for opening a reinforcing bar at an end surface, and the second PC member arranged so that the reinforcing bar insertion hole and the mechanical joint are positioned substantially in a straight line. Then, a screw rebar having a thread formed on the outer peripheral surface is inserted into the rebar insertion hole so that the tip reaches the inside of the mechanical joint, and a fixing plate having a through hole is inserted into the screw hole. The lock nut is brought into contact with the bottom surface of the concave portion of the first PC member so that a reinforcing bar is inserted, and the surface of the fixing plate on the side opposite to the surface of the fixing plate contacting the bottom surface of the concave portion of the first PC member. Screwed into the threaded rebar so that it touches the The filling of the grout into the gap joint, and said reinforcing bar and said reinforcing bar insertion hole between the first PC member and the second PC member characterized.

  According to the present invention, since it is not necessary to fill the plate nut with the grout material, the grout material filling operation is not complicated, and it is not necessary to provide a groove or the like in the column main reinforcing bars, thereby ensuring a predetermined structural strength. be able to.

<First embodiment>
Hereinafter, a first embodiment of a reinforcing bar fixing structure of the present invention will be described with reference to the drawings.
FIG. 1A is a vertical cross-sectional view of the vicinity of a joint portion on the top floor of a column beam structure constructed of a precast concrete member (hereinafter referred to as a PC member) and provided with a reinforcing bar fixing structure 10 of the present embodiment. FIG. 6B is a cross-sectional view taken along the line AA ′ in FIG. As shown in the figure, the fixing structure 10 according to the present embodiment fixes the column main reinforcement at the upper end of the joint portion on the uppermost floor in the column beam structure constructed by joining the PC column member 30 and the PC beam member 20. It is used as a structure. The PC beam member 20 corresponds to the first PC member of the present invention, and the PC column member 30 corresponds to the second PC member of the present invention.

As shown in FIG. 1 (A), a PC column member 30 is connected to a plurality of column main bars 31 and the upper ends of the column main bars 31 and a plurality of machines embedded so that a reinforcing bar insertion opening 32A opens on the upper surface of the member. And a grout injection hole 33 provided so as to reach the grout injection port 32 </ b> B of each mechanical joint 32 from the side surface of the PC column member 30.
The PC beam member 20 is a PC member in which a beam member and a joint panel are integrated. The PC beam member 20 includes a reinforcing bar insertion hole 21 that is formed by a plurality of sheath tubes embedded at positions corresponding to the column main reinforcing bars and opens on the upper surface of the member. Concave portions 23 are provided around the reinforcing bar insertion holes 21 on the upper surface of the PC beam member 20. Further, the reinforcing bar insertion hole 21 has a diameter in which the protruding portion 15 generated when the screw member 13 is connected to the columnar reinforcing bar 11 by upset welding as described later.

  As shown in FIG. 1A, the PC beam member 20 and the PC column member 30 are inserted into the reinforcing bar insertion hole 21 so that the lower end of the column main bar 11 reaches the mechanical joint 32, and is mechanical. The fixing structure which the inside of the joint 32, the joint between the members of the PC beam member 20 and the PC column member 30, and the gap between the reinforcing bar insertion hole 21 and the column main reinforcement 11 is filled with the grout material 14 and the upper end of the column main reinforcement 11 is described later. By being fixed by 10, it functions as an integral column beam structure.

As shown in FIG. 1 (B), the fixing structure 10 of this embodiment includes a thread member 13 joined to the tip of a column main bar 11 by, for example, upset welding, and a penetration formed with a threaded engagement on the inner peripheral surface. The fixing plate 12 which has a hole and is attached by being screwed to the thread member 13 and the grout material 14 which is filled in a gap between the column main reinforcing bar 11 in the reinforcing bar insertion hole 21 and hardened. .
The fixing plate 12 is screwed into the screw member 13 joined to the tip of the column main bar 11 as described above, and is in contact with the surface of the concave portion 23 of the PC beam member 20. As such a fixing plate 12, for example, an EG fixing plate manufactured by Godo Seikan Co., Ltd. can be used. In the present embodiment, the fixing plate 12 is used. However, the fixing plate 12 is not limited to this, and a fixing plate having a concave portion in which an inner peripheral surface is screwed is used. It is good also as screwing together.
According to the fixing structure 10 of the present embodiment, even if a tensile load acts on the column main reinforcement 11, this tensile load is transmitted to the fixing plate 12 via the screw member 13, and the fixing plate 12 is transmitted from the PC beam member 20. By receiving the reaction force, it is possible to resist the tensile load.

Hereinafter, a method for constructing a column beam structure including the fixing structure 10 of the present embodiment will be described. FIG. 2 is a diagram for explaining a method of constructing a column beam structure provided with the fixing structure 10.
First, as shown in FIG. 2 (A), the PC beam member 20 is moved in the horizontal direction from the upper side of the PC column member 30, and the reinforcing bar insertion hole 21, the mechanical joint 32, Are built in a line.

  In addition, the screw member 13 is joined to the upper end of the column main reinforcement 11 by, for example, upset welding, and the fixing plate 12 is screwed onto the screw member 13 and attached. Then, as shown in FIG. 2 (B), the column main reinforcement 11 is arranged such that the lower end reaches the mechanical joint 32 and the fixing plate 12 attached to the upper end contacts the surface of the concave portion 23 of the PC beam member 20. Then, it is inserted into the reinforcing bar insertion hole 21 from above.

  Next, as shown in FIG. 2C, sealing is performed around the joint between the PC column member 30 and the PC beam member 20, and the grout material is introduced from the grout injection hole 33 provided in the PC column member 30. 14 is filled. The grout material 14 filled from the grout injection hole 33 flows into the mechanical joint 32, and when filled into the mechanical joint 32, it flows into the joint between the PC column member 30 and the PC beam member 20. When the joint is filled, it flows into the reinforcing bar insertion hole 21. Further, when the grout material is filled in the reinforcing bar insertion hole 21, the grout material 14 overflows from the upper end of the reinforcing bar insertion hole 21. When it is confirmed that the grout material 14 has been filled up to the top of the reinforcing bar insertion hole 21, the filling of the grout material 14 is finished.

  Since the filled grout material 14 is cured, a joint structure by the mechanical joint 32 is constructed, stress can be transmitted between the column main bars 11 and 31, and the fixing structure 10 is constructed. The PC column member 30 and the PC beam member 20 can function as an integral column beam structure.

  As described above, according to the fixing structure 10 of the present embodiment, the column main bar 11 is formed by the screw member 13 connected to the tip of the column main bar 11 and the fixing plate 12 screwed to the screw member 13. Since it is fixed to the PC beam member 20, it is not necessary to provide a groove in the reinforcing bar for filling the grout material, and the cross-sectional defect of the structural material can be prevented.

<Second Embodiment>
Next, a second embodiment of the fixing structure of the present invention will be described with reference to the drawings. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
FIG. 3A is a vertical direction view of the vicinity of the joint portion on the uppermost floor of the PC column beam structure provided with the reinforcing bar fixing structure 110 of the present embodiment, and FIG. It is sectional drawing. As shown in the figure, the fixing structure 110 of the present embodiment also has a top-floor structure in a column beam structure constructed by joining a PC column member 30 and a PC beam member 20 as in the first embodiment. It is used as a fixing structure for column main bars at the upper end of the mouth. z The PC beam member 20 corresponds to the first PC member of the present invention, and the PC column member 30 corresponds to the second PC member of the present invention. As shown in FIG. 4B, in this embodiment, the PC beam member 20 includes a grout discharge hole 22 provided so as to connect the vicinity of the upper end of the reinforcing bar insertion hole 21 and the upper surface of the member.

As shown in the figure, the PC beam member 20 and the PC column member 30 are such that the column main reinforcement 111 is inserted into the reinforcing bar insertion hole 21 so that the lower end thereof reaches the mechanical joint 32, and The inside, the joint between the members of the PC beam member 20 and the PC column member 30, and the gap between the reinforcing bar insertion hole 21 and the column main reinforcement 111 are filled with the grout material 14, and the upper end of the column main reinforcement 111 is the fixing structure 10 described later. When fixed, it functions as an integral column beam structure.
In the present embodiment, a threaded reinforcing bar having a thread on its surface is used as the pillar main reinforcing bar 111.

  The fixing structure 110 according to this embodiment includes a plate nut 116, a first lock nut 115, and a second lock nut 117 that are screwed into the column main reinforcement 111. The plate nut 116 includes a collar-shaped fixing portion 116A at one end (upper end portion in FIG. 3), and the reinforcing bar insertion of the PC beam member 20 is performed so that the fixing portion 116A is exposed in the recess 23 on the upper surface of the PC beam member 20. It is embedded in the hole 21. The first lock nut 115 is embedded in the PC beam member 20 so as to come into contact with the opposite side (lower side in FIG. 3) of the fixing portion 116A of the plate nut 116. The second lock nut 117 is in contact with the fixing portion 116 </ b> A side of the plate nut 116. The grout material 14 is filled between the column main bars 111 and the reinforcing bar insertion holes 21.

  According to the fixing structure 110 of the present embodiment, the plate nut 116 is fixed to the column main bar 111 by the first lock nut 115 and the second lock nut 117, and the tensile load acting on the column main bar 111 is applied to the plate nut 116. Since the plate nut 116 receives a reaction force from the concrete constituting the PC beam member 20 at the fixing portion 116A, the plate nut 116 can resist this. In the present embodiment, since the second lock nut 117 is provided on the side on which the tensile force acts on the plate nut 116, the tensile stress acting on the column main bar 111 with the screw length including the second lock nut 117 is applied. Can communicate.

Hereinafter, a method for constructing the fixing structure 110 of this embodiment will be described. FIG. 4 is a diagram for explaining a method of constructing the fixing structure 110 of the present embodiment.
First, as shown in the enlarged view of the III part in FIG. 4A, when the PC beam member 20 is manufactured, the plate nut 116 is exposed to the member end surface of the reinforcing bar insertion hole 21 and the fixing part 116A is exposed to the member surface. The first lock nut 115 is embedded in the PC beam member 20 so as to come into contact with the plate nut 116.

  Then, as shown in FIG. 4 (A), before the PC beam member 20 is built, the column main reinforcement 111 is screwed into the plate nut 116 and the first lock nut 115 from above to be inserted into the reinforcing bar insertion hole 21. And the lower end of the column main reinforcement 111 protrudes slightly downward from the lower end of the reinforcing bar insertion hole 21 as shown in an enlarged view in the II part of FIG.

Next, as shown in FIG. 4B, the PC beam member 20 is moved from the upper side of the PC column member 30 so that the reinforcing bar insertion hole 21 and the reinforcing bar insertion port 32A of the mechanical joint 32 are in a straight line. Build in line.
Next, as shown in FIG. 4C, the column main reinforcement 111 is screwed in by rotating around the axis until the lower end thereof reaches the mechanical joint 32.

  Next, as shown in FIG. 4D, after the second lock nut 117 is screwed into the column main reinforcement 111 so as to come into contact with the plate nut 116, as shown in FIG. A predetermined torque is introduced into the lock nut 117.

  Next, as shown in FIG. 4F, sealing is performed around the joint between the PC column member 30 and the PC beam member 20, and the grout material 14 is filled from the grout injection hole 33. When the grout material 14 injected from the grout injection hole 33 flows into the mechanical joint 32 and fills in the mechanical joint 32, it flows into the joint, and when the grout material is filled in the joint, the reinforcing bar It flows into the insertion hole 21. When the grout material 14 is filled to the upper part of the reinforcing bar insertion hole 21, the grout material 14 overflows from the grout discharge hole 22. Thus, when it is confirmed that the grout material 14 has been filled up to the top of the reinforcing bar insertion hole 21, the filling of the grout material 14 is finished.

  When the filled grout material 14 is hardened, the fixing structure 10 of the column main reinforcement 111 is constructed, and the column main reinforcement 111, the PC beam member 20 and the PC column member 30 function as one body, and a column beam structure is established.

  As described above, according to the fixing structure 110 of this embodiment, the column main bar 111 is connected to the PC beam by the plate nut 116, the first lock nut 115, and the second lock nut 117 screwed to the column main bar 111. Since it is fixed to the member 20, it is not necessary to provide a groove in the reinforcing bar as in the fixing structure of the first embodiment, and a cross-sectional defect of the structural material can be prevented.

<Third Embodiment>
Next, a third embodiment of the fixing structure of the present invention will be described with reference to the drawings. In addition, about the structure similar to 1st Embodiment and 2nd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.
FIG. 5A is a vertical sectional view of the vicinity of a joint portion of a column beam structure constructed of the PC member of the present embodiment and provided with a reinforcing bar fixing structure 210, and FIG. It is C 'sectional drawing. As shown in FIG. 4A, the reinforcing bar fixing structure 210 of the present embodiment is also constructed of a column beam structure by joining the PC column member 30 and the PC beam member 20 as in the first embodiment. It is used as a fixing structure for column main bars at the upper end of the joint on the top floor of a column beam structure. In this embodiment as well, a threaded reinforcing bar having a thread on the outer peripheral surface is used as the columnar reinforcing bar 111 as in the second embodiment. The PC beam member 20 corresponds to the first PC member of the present invention, and the PC column member 30 corresponds to the second PC member of the present invention.

  As shown in FIG. 5B, the upper surface of the PC beam member 20 of the present embodiment is provided with a concave portion 223 having a flat bottom surface formed so as to cover the entire opening positions of the plurality of reinforcing bar insertion holes 21. Yes. Further, similar to the second embodiment, each reinforcing bar insertion hole 21 is provided with a grout discharge hole 222 so as to reach the surface of the recess 223.

  The fixing structure 210 of the present embodiment is installed so as to contact the bottom surface of the recess 223, and includes a fixing plate 212 having an insertion hole through which the column main reinforcement 111 is inserted at a position corresponding to the plurality of column main reinforcements 111, and the fixing plate 212. A lock nut 217 fastened to each column main reinforcement 111 and a grout material 14 filled between the reinforcing bar insertion hole 21 and the column main reinforcement 111 are provided so as to be pressed against the beam member 20 side.

  According to the fixing structure 210 of the present embodiment, even if a tensile load acts on the column main reinforcement 111, the tensile load is transmitted to the fixing plate 212 that contacts the PC beam member 20 via the lock nut 217, and the fixing plate 212 is Since it receives a reaction force from the PC beam member 20, it can resist the tensile load.

Hereinafter, a method for constructing the fixing structure 210 of the present embodiment will be described. FIG. 6 is a diagram for explaining a method of constructing the fixing structure 210 of the present embodiment.
First, as shown in FIGS. 6A to 6B, the PC beam member 20 is moved in the horizontal direction from the upper side of the PC column member 30, and the reinforcing bar insertion hole 21 embedded in the PC beam member 20 is formed. Then, it is built so as to be aligned with the reinforcing bar insertion opening of the mechanical joint 32 exposed at the upper part of the PC column member 30.

Next, as shown in FIG. 6C, the column main reinforcement 111 is inserted into the reinforcing bar insertion hole 21 so that the lower end thereof reaches the mechanical joint 32 and the vicinity of the upper end protrudes into the recess 223.
Next, as shown in FIG. 6D, the fixing plate 212 is installed so that the protruding portion of the columnar main bar 111 passes through the insertion hole and contacts the bottom surface of the recess 223 of the PC beam member 20. .

Next, as shown in FIG. 6 (E), a lock nut 217 is tightened on top of each columnar reinforcement 111 to introduce torque.
Next, as shown in FIG. 6F, the grout material 14 is injected from the grout injection hole 33. The grout material 14 injected from the grout injection hole 33 flows into the mechanical joint 32, flows into the joint when filled in the mechanical joint 32, and refills the hole 21 when filled into the joint. Flows in. When the grout material 14 overflows from the grout discharge hole 222 to confirm that the grout material 14 has been filled up to the uppermost part of the reinforcing bar insertion hole 21, the filling of the grout material 14 is terminated.

  When the filled grout material 14 is hardened, the fixing structure 210 of the column main reinforcement 111 is constructed, and the column main reinforcement 111, the PC beam member 20 and the PC column member 30 function as one body, and a column beam structure is constructed.

  As described above, according to the fixing structure 210 of the present embodiment, the column main bar 111 is fixed by the fixing plate 212 and the lock nut 217 tightened to each column main bar 111 so as to press the fixing plate 212. Therefore, it is not necessary to provide a groove in the reinforcing bar, and the cross-sectional defect of the structural material can be prevented.

  In each of the above embodiments, the fixing structure of the present invention has been described as the fixing structure at the upper end of the column main reinforcement in the joint portion on the uppermost floor of the column beam structure. It can also be used as a fixing structure in the joint portion of the beam main bar of the beam structure.

(A) is a vertical cross-sectional view of the vicinity of the joint portion on the uppermost floor of the column beam structure constructed of the PC member and provided with the reinforcing bar fixing structure of the first embodiment, and (B) is in (A). It is AA 'sectional drawing. It is a figure for demonstrating the method to construct | assemble the column beam structure provided with the fixing structure of 1st Embodiment. (A) is a vertical direction view of the vicinity of the joint portion on the uppermost floor of the PC column beam structure provided with the reinforcing bar fixing structure of the second embodiment, and (B) is a sectional view taken along line BB ′ in (A). It is. It is a figure for demonstrating the method to construct | assemble the fixing structure of 2nd Embodiment. (A) is a vertical direction view of the vicinity of the joint portion on the top floor of the PC column beam structure having the reinforcing bar fixing structure of the third embodiment, and (B) is a cross-sectional view taken along the line CC ′ in (A). It is. It is a figure for demonstrating the method of constructing the fixing structure of 3rd Embodiment.

Explanation of symbols

10, 110, 210 Fixing structure 11, 111 Column main reinforcement 12, 212 Fixing plate 13 Thread member 14 Grout material 15 Protruding portion 20 PC beam member 21 Sheath tube 22, 222 Grout discharge hole 23, 223 Recess 30 PC column member 31 Column Main bar 32 Mechanical joint 32A Reinforcing bar insertion port 32B Grout inlet 33 Grout inlet 115 First lock nut 116 Plate nut 116A Fixing portion 117 Second lock nut 217 Lock nut

Claims (13)

Insert the reinforcing bar into the reinforcing bar insertion hole that opens at the bottom of the recess provided on the surface of the PC member, fill the gap between the reinforcing bar insertion hole and the reinforcing bar, and fill the opening side end of the reinforcing bar. A fixing structure for fixing to the PC member,
A thread member that is joined to the opening-side end of the reinforcing bar and has a thread formed on the outer peripheral surface;
A fixing member attached to the thread member by having a hole formed with a thread on the inner peripheral surface, and the hole is screwed to the outer periphery of the thread member;
Reinforcing bar fixing structure characterized by comprising: Insert the screw rebar into a rebar insertion hole that opens at the bottom of the recess provided on the surface of the PC member, and fill the grout material between the rebar insertion hole and the screw rebar, and open the screw rebar on the opening side. A fixing structure for fixing an end to the PC member,
A flange-shaped fixing portion extending outward and a through hole are embedded in an end portion of the reinforcing bar insertion hole of the PC member so as to be exposed at the bottom surface of the concave portion of the PC member. A fixing member through which the screw rebar is inserted;
A first lock nut embedded in the reinforcing bar insertion hole of the PC member so as to come into contact with the side opposite to the side exposed to the bottom surface of the concave portion of the PC member of the fixing member and screwed with the screw reinforcing bar;
A reinforcing bar fixing structure, comprising: a second lock nut that abuts on the side of the fixing member exposed to the bottom surface of the concave portion of the PC member and is screwed with the screw reinforcing bar. Insert the screw rebar into a rebar insertion hole that opens at the bottom of the recess provided on the surface of the PC member, and fill the grout material between the rebar insertion hole and the screw rebar, and open the screw rebar on the opening side. A fixing structure for fixing an end to the PC member,
A fixing plate having a through-hole through which the screw rebar is inserted, and abutting against the bottom surface of the concave portion of the PC member;
Reinforcing bar fixing structure comprising: a lock nut that is screwed into the threaded reinforcing bar so as to be in contact with a surface opposite to a surface that is in contact with the bottom surface of the concave portion of the PC member of the fixing plate. . The reinforcing bar is inserted into a reinforcing bar insertion hole that opens at the bottom of the recess provided in the PC member, and a grout material is filled between the reinforcing bar insertion hole and the reinforcing bar, and the opening side end of the reinforcing bar is connected to the PC. A fixing method for fixing to a member,
Join the thread member in which the thread is formed on the outer peripheral surface to the tip of the reinforcing bar,
A fixing member having a hole formed with a thread on the inner peripheral surface is attached to the thread member by screwing the hole to the outer periphery of the thread member,
A method for fixing a reinforcing bar, comprising inserting the reinforcing bar into the reinforcing bar insertion hole. Insert the screw rebar into a rebar insertion hole that opens to the bottom surface of the recess provided in the PC member, and fill the grout material between the rebar insertion hole and the screw rebar, and open the end of the screw rebar A fixing method for fixing to the PC member,
A fixing member having a collar-shaped fixing portion extending outward and a through hole is embedded in an end portion of the reinforcing bar insertion hole of the PC member so as to be exposed at the bottom surface of the concave portion of the PC member. ,
The first lock nut is embedded in the reinforcing bar insertion hole of the PC member so as to contact the side of the fixing member opposite to the side exposed to the bottom surface of the concave portion of the PC member,
The screw rebar is inserted through the through hole of the fixing member and inserted into the rebar insertion hole so as to be screwed with the first lock nut,
A rebar fixing method, wherein a second lock nut is screwed into the screw rebar so as to abut on a side of the fixing member exposed to the bottom surface of the concave portion of the PC member. Insert the screw rebar into a rebar insertion hole that opens to the bottom surface of the recess provided in the PC member, and fill the grout material between the rebar insertion hole and the screw rebar, and open the end of the screw rebar A fixing method for fixing to the PC member,
A fixing plate having a through hole is brought into contact with the bottom surface of the concave portion of the PC member so that the screw rebar is inserted through the through hole;
A rebar fixing structure, wherein a lock nut is screwed into the screw rebar so as to contact a surface opposite to a surface of the fixing plate that is in contact with the bottom surface of the concave portion of the PC member. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A structure for joining a PC member,
A rebar inserted through the rebar insertion hole so that one end reaches into the mechanical joint;
A thread member joined to the other end of the reinforcing bar and having a thread formed on the outer peripheral surface;
A fixing member attached to the thread member by having a hole formed with a thread on the inner peripheral surface, and the hole is screwed to the outer periphery of the thread member;
In the mechanical joint, a joint between the first PC member and the second PC member, and a grout material filled in a gap between the reinforcing bar and the reinforcing bar insertion hole are provided. PC member joining structure. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A structure for joining a PC member,
A threaded reinforcing bar that is inserted into the reinforcing bar insertion hole so that the tip reaches the inside of the mechanical joint, and a thread is formed on the outer peripheral surface;
A flange-shaped fixing portion extending outward and a through hole are embedded in the end portion of the reinforcing bar insertion hole of the first PC member so as to be exposed at the bottom surface of the concave portion of the first PC member. A fixing member through which the screw rebar is inserted into the through hole;
The fixing member is embedded in the reinforcing bar insertion hole of the first PC member so as to be in contact with the side opposite to the side exposed to the bottom surface of the recess of the first PC member, and is screwed into the screw reinforcing bar. 1 lock nut,
A second lock nut that contacts the side of the fixing member exposed to the bottom surface of the recess of the first PC member and is screwed into the screw rebar;
In the mechanical joint, a joint between the first PC member and the second PC member, and a grout material filled in a gap between the reinforcing bar and the reinforcing bar insertion hole are provided. PC member joining structure. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A structure for joining a PC member,
A threaded reinforcing bar that is inserted into the reinforcing bar insertion hole so that the tip reaches the inside of the mechanical joint, and a thread is formed on the outer peripheral surface;
A fixing plate having a through-hole through which the screw rebar is inserted, and abutting against a bottom surface of the concave portion of the first PC member;
A lock nut fastened to the screw rebar so as to abut the surface opposite to the surface abutting the bottom surface of the concave portion of the first PC member of the fixing plate;
In the mechanical joint, a joint between the first PC member and the second PC member, and a grout material filled in a gap between the reinforcing bar and the reinforcing bar insertion hole are provided. PC member joining structure.   The said 1st PC member is equipped with the grout discharge hole which connects the said reinforcing-bar insertion hole and the surface of the said 1st PC member, The joining structure of the PC member of Claim 8 or 9 characterized by the above-mentioned. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A method of joining a PC member,
Join the thread member with the thread formed on the outer peripheral surface to one end of the rebar,
A fixing member having a hole formed with a thread on the inner peripheral surface is attached to the thread member by screwing the hole to the outer periphery of the thread member,
The rebar is inserted through the rebar insertion hole so that the other end reaches into the mechanical joint,
The joint of PC members, wherein a grout material is filled in the mechanical joint, the joint between the first PC member and the second PC member, and the gap between the reinforcing bar and the reinforcing bar insertion hole. Method. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A method of joining a PC member,
An end of the reinforcing bar insertion hole of the first PC member so that a fixing member having a collar-shaped fixing portion extending outward and a through hole is exposed on the bottom surface of the concave portion of the first PC member. Buried in the department,
The first lock nut is embedded in the reinforcing bar insertion hole of the first PC member so as to abut the side opposite to the side exposed to the bottom surface of the concave portion of the first PC member of the fixing member,
The rebar having a thread formed on the outer peripheral surface is inserted through the through hole of the fixing member, is screwed with the first lock nut, and the tip reaches the inside of the mechanical joint. Insert it through the insertion hole,
A second lock nut is screwed into the threaded reinforcing bar so as to contact the side of the fixing member exposed to the bottom surface of the recess of the first PC member;
The joint of PC members, wherein a grout material is filled in the mechanical joint, the joint between the first PC member and the second PC member, and the gap between the reinforcing bar and the reinforcing bar insertion hole. Method. A first PC member comprising a reinforcing bar insertion hole penetrating the member, and a recess in which the reinforcing bar insertion hole opens on the bottom surface;
A second reinforcing bar that is connected to the main reinforcing bar and has a mechanical joint that opens at an end face of the reinforcing bar, and the reinforcing bar insertion hole and the mechanical coupling are arranged in a substantially straight line; A method of joining a PC member,
Insert the threaded rebar with the thread formed on the outer peripheral surface through the rebar insertion hole so that the tip reaches the mechanical joint,
A fixing plate having a through hole is brought into contact with the bottom surface of the concave portion of the first PC member so that the screw rebar is inserted through the through hole;
A lock nut is screwed into the screw rebar so as to come into contact with the surface opposite to the surface of the fixing plate that comes into contact with the bottom surface of the recess of the first PC member,
The joint of PC members, wherein a grout material is filled in the mechanical joint, the joint between the first PC member and the second PC member, and the gap between the reinforcing bar and the reinforcing bar insertion hole. Method.

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