JP4989411B2 - Joining structure of precast concrete members and joining method of precast concrete members - Google Patents

Description

  The present invention relates to a precast concrete member joining structure for joining precast concrete members together, and a precast concrete member joining method.

  In the construction of reinforced concrete buildings, precast column members and beam members are actively used in order to save construction workers and improve construction efficiency. In particular, in the construction of high-rise buildings, rationalization of construction is important for shortening the construction period and reducing costs, and therefore construction using precast column members and beam members is effective.

  For example, a building-to-column connection structure 300 as shown in FIG. 19 is employed. In the column beam connection structure 300, a PCa horizontal structure 308 in which a column fitting 304 and a large beam 306 are integrated is placed on a precast concrete (hereinafter referred to as PCa) column 302. .

  A column sleeve 312 is embedded in the column base portion of the PCa column 310 placed on the PCa horizontal structure 308. Then, the column connecting rebar 316 provided so as to protrude upward from the PCa column 302 is passed through the vertical through-hole 314 formed in the column connection portion 304. Further, by inserting and fixing the end portion of the column connection reinforcing bar 316 into the column sleeve 312 of the PCa column 310, the PCa column 302 and the PCa column 310 are joined to each other via the column connection portion 304. is doing.

  The opposing large beams 306 are provided with beam connection reinforcing bars 320 so as to protrude from the ends of the large beams 306. Then, the end portions of the protruding beam connecting rebar 320 are connected to each other by a mechanical joint 318, a formwork is provided at a joint portion between the large beams 306, and concrete U is post-placed to join the large beams 306 to each other. ing.

  As shown in FIG. 20, in the column-beam joint structure 322 of the building of Patent Document 1, a PCa horizontal structure 330 in which a column fitting 326 and a large beam 328 are integrated on a PCa column 324. Is placed.

  A beam sleeve 332 is embedded in the end of the beam 328 of the PCa horizontal structure 330 positioned on the left side, and the beam sleeve 332 is projected from the end of the beam 328 in the PCa horizontal structure 330 positioned on the right side. A connecting rebar 334 is provided. Then, the right-hand PCa horizontal structure 330 is horizontally moved to the left side, and the ends of the protruding beam connecting reinforcing bars 334 are inserted into the beam sleeve 332 and fixed, thereby joining the large beams 328 to each other.

  A column sleeve 338 is embedded in the column head of the PCa column 324. Then, a column connecting reinforcing bar 340 provided so as to protrude downward from a PCa column 336 placed on the PCa horizontal structure 330 is formed into a vertical through hole 342 formed in the column fitting portion 326. To penetrate. Further, by inserting and fixing the end of the column connection reinforcing bar 340 into the column sleeve 338 of the PCa column 324, the PCa column 324 and the PCa column 336 are joined via the column port 326. is doing.

However, in the column-beam joint structure 300 of FIG. 19, when the PCa horizontal structure 308 is placed on the PCa column 302, the horizontal movement of the PCa horizontal structure 308 is restricted, and the column of FIG. In the beam joint structure 322, when the PCa column 336 is placed on the PCa horizontal structure 330, the horizontal movement of the PCa column 336 is restricted.
That is, after placing the upper member (PCa horizontal structure 308, PCa column 336) on the lower member (PCa column 302, PCa horizontal structure 330), in order to improve the building accuracy, It becomes difficult to adjust the position by moving the upper member in the horizontal direction.

This is the same problem in the method of joining columns. That is, the joining of the PCa pillar 302 and the PCa pillar 310 shown in FIG. 19 and the joining of the PCa pillar 324 and the PCa pillar 336 shown in FIG. When the upper member (PCa columns 310 and 336) is placed on the lower member (PCa columns 302 and 324), the upper member is horizontally aligned by the column connecting reinforcing bars 316 and 340. Therefore, it is difficult to adjust the position by moving the upper member in the horizontal direction in order to improve the construction accuracy.
Japanese Patent Application Laid-Open No. 2004-346587

  In view of such facts, the present invention has an object to provide a precast concrete member joining structure and a precast concrete member joining method capable of moving an upper member placed on a lower member horizontally or horizontally. To do.

The invention of the first aspect is a lower member formed of precast concrete, an upper member formed of precast concrete and placed on the lower member, and formed in the lower member or the upper member, and a hole or space. And a joining member that is accommodated in the upper member or the lower member, pulled out from the upper member or the lower member and inserted into the insertion portion, and joins the lower member and the upper member It is characterized by having.

In the first aspect of the invention, the upper member formed of the precast concrete is placed on the lower member formed of the precast concrete.
The lower member or the upper member is formed with an insertion portion composed of a hole or a space. Moreover, the joining member is accommodated in the upper member or the lower member.
And this joining member is pulled out from an upper member or a lower member, and is inserted in an insertion part, and joins a lower member and an upper member.

Here, when the upper member is placed on the lower member, the joining member is accommodated in the upper member or the lower member, and does not protrude from the upper member or the lower member.
For this reason, the upper member placed on the lower member can be moved laterally or horizontally. Therefore, after placing the upper member on the lower member, the position of the upper member can be adjusted in order to improve the construction accuracy.

The invention of the second aspect is characterized in that the lower member and the upper member are a column member and a column member, a column member and a column beam joint member, or a column beam joint member and a column member.

In the invention of the second aspect , the action and effect of the first aspect can be obtained for the column member and the column member, the column member and the column beam joint member, or the joining of the column beam joint member and the column member.
Also, two horizontal members constituted by a column beam joint member and a beam member integrated with the column beam joint member are placed next to each other on the column member, and the beam members of these horizontal members are joined to each other. In this case, the joining member is accommodated in the column beam joint member or column member of the horizontal member, and does not protrude from the column beam joint member or column member of the horizontal member. Thereby, the joining method which joins the beam members of a horizontal member by moving one of the horizontal members arrange | positioned adjacently horizontally or horizontally can be employ | adopted.
The method of joining the beam members by moving the beam members (horizontal members) horizontally or horizontally as described above is to bring the end surfaces of the beam members into close contact with each other or the gap formed between the end surfaces of the beam members Can be reduced.
That is, it becomes possible to eliminate the work of post-molding the concrete by providing a mold at the joint between the beam members, and the workability can be improved.

According to a third aspect of the present invention, the joining member is housed in the upper member, and when the lower member and the upper member are joined, the joining member is lowered by its own weight and disposed on the lower member, It is characterized by connecting a column reinforcing bar arranged on the upper member.

In the invention of the third aspect , the joining member is accommodated in the upper member. And when this joining member joins a lower member and an upper member, it falls by own weight, and connects the column reinforcement arranged in the lower member, and the column reinforcement arranged in the upper member.

Therefore, since the joining member descends by its own weight and joins the lower member and the upper member, the joining operation can be easily performed.
Further, it is not necessary to form a large working space in the upper member for putting a hand or a tool in order to pull out the joining member at the time of joining. Therefore, the labor for filling the working space with grout, the work for installing the formwork, and the like become unnecessary.

The invention of a fourth aspect is characterized in that the joining member is a hollow tube that connects the column reinforcing bar arranged in the lower member and the column reinforcing bar arranged in the upper member.

In the invention of the 4th mode , column reinforcement can be connected reliably by making it a hollow tube which connects the column reinforcement arranged in the lower member and the column reinforcement arranged in the upper member as a joining member. . Moreover, after connecting column reinforcement with a hollow tube, if a hardening | curing material is inject | poured in a hollow tube and a column reinforcement is fixed to a hollow tube, a column reinforcement can be fixed to a hollow tube reliably.

According to a fifth aspect of the invention, the joining member is disposed so as to overlap in a longitudinal direction with respect to each of the column reinforcing bars disposed on the lower member and the column reinforcing bars disposed on the upper member, and It is a bar material that joins the upper member.

In the fifth aspect of the invention, the joining member is a bar disposed so as to overlap in the longitudinal direction with respect to each of the column reinforcing bars disposed on the lower member and the column reinforcing bars disposed on the upper member. The member and the upper member are joined.
Therefore, the bar material as the joining member can be arranged without being greatly restricted by the arrangement and number of column reinforcing bars provided on the lower member and the upper member.

The invention of a sixth aspect is the precast concrete member joining method in which the lower member formed of precast concrete and the upper member formed of precast concrete and placed on the lower member are joined. The joining member accommodated in the lower member is pulled out from the upper member or the lower member, and is inserted into an insertion portion formed in the lower member or the upper member and having a hole or a space, and the lower member and the upper member are It is characterized by joining.

In the sixth aspect of the invention, the upper member formed of the precast concrete is placed on the lower member formed of the precast concrete, and the lower column member and the upper column member are joined.

In this joining method, first, the joining member accommodated in the upper member or the lower member is pulled out from the upper member or the lower member.
Next, the joining member pulled out is inserted into the insertion portion formed in the lower member or the upper member, and the lower member and the upper member are joined. This insertion part is constituted by a hole or a space.

Here, when the upper member is placed on the lower member, the joining member is accommodated in the upper member or the lower member, and does not protrude from the upper member or the lower member.
For this reason, the upper member placed on the lower member can be moved laterally or horizontally. Therefore, after placing the upper member on the lower member, the position of the upper member can be adjusted in order to improve the construction accuracy.

The seventh aspect of the invention is characterized in that the lower member and the upper member are a column member and a column member, a column member and a column beam joint member, or a column beam joint member and a column member.

In the invention of the seventh aspect , the same actions and effects as those of the sixth aspect are obtained for the column member and the column member, the column member and the column beam joint member, or the joining method of the column beam joint member and the column member. Can do.
In addition, two horizontal members constituted by a column beam joint member and a beam member integrated with the column beam joint member are placed adjacent to each other on each column member, and the beam members of these horizontal members are connected to each other. When joining, the joining member is accommodated in the column beam joint member or column member of the horizontal member, and does not protrude from the column beam joint member or column member of the horizontal member. Thereby, the joining method which moves one side of the horizontal member arrange | positioned adjacently horizontally or horizontally, and joins the beam members of a horizontal member is employable.
The method of joining the beam members by moving the beam members (horizontal members) horizontally or horizontally as described above is to bring the end surfaces of the beam members into close contact with each other or the gap formed between the end surfaces of the beam members Can be reduced.
That is, it becomes possible to eliminate the work of post-molding the concrete by providing a mold at the joint between the beam members, and the workability can be improved.

The invention of an eighth aspect is characterized in that the joining member is a hollow tube that connects the column reinforcing bar arranged in the lower member and the column reinforcing bar arranged in the upper member.

In the invention of the eighth aspect , the column reinforcing bars can be reliably connected to each other by making the joining member a hollow tube connecting the column reinforcing bars arranged in the lower member and the column reinforcing bars arranged in the upper member. . Moreover, after connecting column reinforcement with a hollow tube, if a hardening | curing material is inject | poured in a hollow tube and a column reinforcement is fixed to a hollow tube, a column reinforcement can be fixed to a hollow tube reliably.

In a ninth aspect of the invention, the joining member is disposed so as to overlap in a longitudinal direction with respect to each of the column reinforcing bars disposed on the lower member and the column reinforcing bars disposed on the upper member, and It is a bar material that joins the upper member.

In the ninth aspect of the invention, the joining member is a bar disposed so as to overlap in the longitudinal direction with respect to each of the column reinforcing bars disposed on the lower member and the column reinforcing bars disposed on the upper member. The member and the upper member are joined.
Therefore, the bar material as the joining member can be arranged without being greatly restricted by the arrangement and number of column reinforcing bars provided on the lower member and the upper member.

  Since this invention set it as the said structure, the upper member mounted on the lower member can be moved to a horizontal direction or a horizontal direction.

  The precast concrete member joining structure and the precast concrete member joining method of the present invention will be described with reference to the drawings. In this embodiment, the lower member and the upper member are precast concrete (hereinafter referred to as “PCa”) column members and column beam joint members, so that this embodiment is reinforced concrete, steel reinforced concrete, and prestressed concrete. The present invention can be applied to various PCa column members such as concrete and column beam joint members.

  First, a first embodiment of the present invention will be described.

  As shown in the front view of FIG. 1A, in the PCa member bonding structure 10, an upper column member 14 as an upper member formed of PCa is formed on a lower column member 12 as a lower member formed of PCa. Is placed. As shown in FIG. 2, female screws 16 are formed at the four corners of the upper end surface of the lower column member 12. Adjust.

As shown in FIG. 3 which is an AA cross-sectional view of FIG. 1A, twelve column reinforcing bars 24 are arranged along the outer periphery of the upper column member 14 inside the upper column member 14. As shown in FIG. 1A, the column reinforcing bar 24 is arranged so that the lower end portion of the column reinforcing bar 24 does not protrude from the lower end surface of the upper column member 14.
In addition, twelve sheath tubes 20 are embedded in the lower end portion of the upper column member 14 along the outer periphery of the upper column member 14 so as not to protrude from the lower end surface of the upper column member 14, thereby forming a hole 22. ing.

  The planar arrangement of the center positions of the sheath tube 20 and the column rebar 24 is the same, and the column rebar 24 is inserted into each sheath tube 20. Further, a plurality of shear reinforcement bars 34 surrounding the sheath tube 20 and the column reinforcement 24 are arranged at regular intervals in the vertical direction, and the concrete V in which the sheath tube 20, the column reinforcement 24, and the shear reinforcement bar 34 form the upper column member 14. It is united by.

Inside the lower column member 12, twelve column reinforcing bars 28 are arranged along the outer periphery of the lower column member 12. The column reinforcing bars 28 are arranged so that the upper end portion of the column reinforcing bars 28 does not protrude from the upper end surface of the lower column member 12.
In addition, twelve sheath tubes 30 are embedded in the upper end portion of the lower column member 12 along the outer periphery of the lower column member 12 so as not to protrude from the upper end surface of the lower column member 12, thereby forming holes as insertion portions. 32 is formed.

  The planar arrangement of the center positions of the sheath tube 30 and the column reinforcement 28 is the same, and the column reinforcement 28 is inserted into each sheath tube 30. A plurality of shear reinforcement bars 36 surrounding the sheath tube 30 and the column reinforcement 28 are arranged at regular intervals in the vertical direction, and the concrete V in which the sheath tube 30, the column reinforcement 28, and the shear reinforcement bar 36 form the lower column member 12. It is united by.

  The column rebar 24 and the column rebar 28 have the same diameter, and the sheath tube 20 and the sheath tube 30 have the same inner and outer diameters. Further, the planar arrangement of the column reinforcing bars 24 and the column reinforcing bars 28 and the planar arrangement of the sheath tube 20 and the sheath tube 30 are the same. That is, the end surfaces of the column rebar 24 and the column rebar 28 and the end opening surfaces of the sheath tube 20 and the sheath tube 30 face each other.

  The hole 22 formed by the sheath tube 20 accommodates a hollow tube 26 as a joining member. That is, the hollow tube 26 is accommodated in the upper column member 14. The hollow tube 26 is a plug-in mechanical joint that can be inserted without screwing the column rebars 24 and 28. In the state of FIG. 1A, the column rebar 24 is inserted into the hollow tube 26. Yes.

Further, a grout injection hole 44 described later is formed on the side surface of the lower column member 12, and a grout discharge hole 40 described later is formed on the side surface of the upper column member 14. The grout injection hole 44 is connected to the lower part of the hole 32, and the grout discharge hole 40 is connected to the upper part of the hole 22.
In addition, the magnitude | size of the diameter of the column reinforcement 24 and the column reinforcement 28 and the magnitude | size of the internal diameter and outer diameter of the sheath pipe | tube 20 and the sheath pipe | tube 30 may not be the same. When the diameters of the column reinforcing bars 24 and the column reinforcing bars 28 are different, a hollow tube that can connect column reinforcing bars having different diameters may be used.

  Next, the operation and effect of the first embodiment of the present invention will be described.

In the PCa member joining method, first, as shown in FIG. 1A, the upper pillar member 14 is placed on the lower pillar member 12.
Next, the lower column member 12 and the upper column member 14 are joined. As shown in FIGS. 1 (A) and 1 (B), the joining method is such that the hollow tube 26 accommodated in the hole 22 of the upper column member 14 is lowered by its own weight, and is hollow from the hole 22 of the upper column member 14. The tube 26 is pulled out and inserted into a hole 32 as an insertion portion formed at the upper end portion of the lower column member 12. At this time, the end portion of the column reinforcement 28 provided in the lower column member 12 is inserted into the hollow tube 26. FIG. 1A shows a situation before the lower pillar member 12 and the upper pillar member 14 are joined, and FIG. 1B shows a situation where the lower pillar member 12 and the upper pillar member 14 are joined. Yes.

  As shown in FIG. 4 (A), in the state of FIG. 1 (A) before joining the lower pillar member 12 and the upper pillar member 14, a grout formed substantially horizontally on the upper pillar member 14 by the string 38. The side surface of the upper column member 14 and the upper end of the hollow tube 26 are connected via the discharge hole 40, and the hollow tube 26 is suspended from above the hole 22. At this time, the hollow tube 26 is accommodated in the hole 22 so that the lower end portion does not protrude from the lower end surface of the upper column member 14.

  Therefore, when the upper pillar member 14 is placed on the lower pillar member 12, the hollow tube 26 is accommodated in the hole 22 of the upper pillar member 14 and does not protrude from the upper pillar member 14. Thereby, the upper pillar member 14 placed on the lower pillar member 12 can be moved in the horizontal direction or horizontally. That is, after the upper column member 14 is placed on the lower column member 12, the position of the upper column member 14 can be adjusted.

  When the end of the string 38 is fixed to the side surface of the upper column member 14 in the state shown in FIG. 4A or the string 38 is cut, the hollow tube 26 has its own weight as shown in FIG. And is inserted into the hole 32 formed in the upper end portion of the lower column member 12, and the end portion of the column reinforcing bar 28 provided in the lower column member 12 is inserted into the hollow tube 26. Thereby, the lower pillar member 12 and the upper pillar member 14 are joined.

Therefore, the column reinforcement 28 provided on the lower column member 12 and the column reinforcement 24 provided on the upper column member 14 can be reliably connected by the hollow tube 26.
Moreover, since the hollow tube 26 as a joining member descends by its own weight and joins the lower pillar member 12 and the upper pillar member 14, joining work can be performed easily.
Further, it is not necessary to form a large work space in the upper column member 14 for putting a hand or the like in order to pull out the middle space 26 at the time of joining. Therefore, the labor for filling the working space with grout, the work for installing the formwork, and the like become unnecessary.

  After the end of the column reinforcing bar 28 provided in the lower column member 12 is inserted into the hollow tube 26 inserted in the hole 32, the lower end surface of the upper column member 14 and the lower column surface as shown in FIG. The outer peripheral portion of the gap space S formed between the upper end surface of the lower column member 12 is closed with an air hose 42, a mold, or the like. Further, the hardening material W is injected from the grout injection hole 44 formed substantially horizontally in the lower column member 12, and the excess hardening material W is discharged from the grout discharge hole 40, and the hollow pipe 26 is formed in the holes 32 and 22. The inside and the gap space S are filled with the curing material W. Then, the filled curing material W is cured to fix the end portions of the column reinforcing bars 28 and 24 to the hollow tube 26.

  In 1st Embodiment, although the lower member was made into the lower pillar member 12, the upper member was made into the upper pillar member 14, the example which joins the lower pillar member 12 and the upper pillar member 14 was shown, but it shows to FIG. Such a joining structure may be used for joining a column member to a horizontal member constituted by a column beam joint member and a beam member integrated with the column beam joint member.

  In the PCa member joining structure 58 shown in FIG. 5, a column beam joint member 48 made of PCa and beam members 50 and 52 made of PCa provided so as to protrude from the left and right side surfaces of the column beam joint member 48 are provided. The column beam joint member 48 of the integrated horizontal member 46 is used as a lower member.

Inside the column beam joint member 48, twelve column reinforcing bars 28 are arranged along the outer periphery of the column beam joint member 48. The column reinforcing bar 28 is arranged so that the upper end portion of the column reinforcing bar 28 does not protrude from the upper end surface of the column beam joint member 48.
In addition, twelve sheath tubes 30 are embedded along the outer periphery of the column beam joint member 48 so as not to protrude from the upper end surface of the column beam joint member 48 at the upper end portion of the column beam joint member 48. Thus, a hole 32 as an insertion portion is formed.

  The planar arrangement of the center positions of the sheath tube 30 and the column reinforcing bars 28 is the same as the planar arrangement of the center positions of the sheath tube 30 and the column reinforcing bars 28 provided in the lower column member 12 shown in FIG. A plurality of shear reinforcement bars 36 surrounding the sheath tube 30 and the column reinforcement 28 are arranged at regular intervals in the vertical direction, and the sheath tube 30, the column reinforcement 28, and the shear reinforcement bar 36 are made of concrete V that forms the horizontal member 46. It is united.

  Then, after placing the upper column member 14 on the column beam joint member 48 of the horizontal member 46, the hollow tube 26 accommodated in the hole 22 of the sheath tube 20 provided in the upper column member 14 is caused by its own weight. It is lowered, pulled out from the hole 22, and inserted into the hole 32 as an insertion part of the sheath tube 30 provided at the upper end of the column beam joint member 48. At this time, the column reinforcement 28 provided in the column beam joint member 48 is inserted into the middle space 26. Further, the column reinforcing bars 24 and 28 are fixed to the hollow tube 26 by the hardening material W, and the column beam joint member 48 of the horizontal member 46 and the upper column member 14 are joined.

  In the PCa member joining structure 60 of FIG. 6, a PCa column beam joint member 56 and PCa beam members 50 and 52 provided so as to protrude from the left and right side surfaces of the column beam joint member 56 are provided. The column beam joint member 56 of the integrated horizontal member 54 is used as the upper member.

Twelve column reinforcing bars 24 are arranged along the outer periphery of the column beam connection member 56 inside the column beam connection member 56. The column reinforcing bar 24 is arranged so that the lower end portion of the column reinforcing bar 24 does not protrude from the lower end surface of the column beam joint member 56.
In addition, twelve sheath tubes 20 are embedded in the lower end portion of the column beam joint member 56 along the outer periphery of the column beam joint member 56 so as not to protrude from the lower end surface of the column beam joint member 56. Thus, the hole 22 is formed.

  The planar arrangement of the center positions of the sheath tube 20 and the column reinforcing bars 24 is the same as the planar arrangement of the center positions of the sheath tube 20 and the column reinforcing bars 24 provided in the upper column member 14 shown in FIG. A plurality of shear reinforcement bars 34 surrounding the sheath tube 20 and the column reinforcement 24 are arranged at regular intervals in the vertical direction, and the sheath tube 20, the column reinforcement 24, and the shear reinforcement bar 34 are made of concrete V that forms the horizontal member 54. It is united.

  The hole 22 formed by the sheath tube 20 accommodates a hollow tube 26 as a joining member. Then, after placing the column beam joint member 56 of the horizontal member 54 on the lower column member 12, the hollow tube 26 accommodated in the hole 22 of the sheath tube 20 provided in the column beam joint member 56 is removed. It is lowered by its own weight, pulled out from the column beam joint member 56, and inserted into the hole 32 as the insertion portion of the sheath tube 30 provided at the upper end portion of the lower column member 12. At this time, the column reinforcement 28 provided on the lower column member 12 is inserted into the hollow tube 26. Further, the column reinforcing bars 24 and 28 are fixed to the hollow tube 26 by the hardening material W, and the lower column member 12 and the column beam joint member 56 of the horizontal member 54 are joined.

In the PCa member joining structure 60 shown in FIG. 6, two horizontal members 54 are placed next to each other on the lower column member 12, and the beam members of these horizontal members 54 (the beam member 50 and the beam member 52) are connected to each other. When joining (for example, using the joining method of the beam members as shown in FIG. 20), the hollow tube 26 as the joining member is accommodated in the column beam joint member 56 of the horizontal member 54, It does not protrude from the column beam joint member 56 of the horizontal member 54. Thereby, one side of the horizontal member 54 arrange | positioned adjacently can be moved to a horizontal direction, and the beam members of the horizontal member 54 can be joined.
Further, the PCa member joining structure 60 may be used in combination with the conventional joining method of beam members as shown in FIG.

As described above, the PCa member joining structure 60 according to the first embodiment includes various beam member joining methods for joining the beam members of the horizontal member by moving the horizontal member in the vertical direction, the horizontal direction, or the horizontal direction. It can be used in combination. The PCa member joining structure 60 of the first embodiment is capable of lateral movement or horizontal movement when the horizontal member is placed on the lower pillar member and after the horizontal member is placed on the lower pillar member. This is particularly effective when the horizontal members are moved horizontally or horizontally to join the beam members of the horizontal members.
The method of joining the beam members by moving the beam members (horizontal members) horizontally or horizontally as described above is to bring the end surfaces of the beam members into close contact with each other or the gap formed between the end surfaces of the beam members Can be reduced.
That is, it becomes possible to eliminate the work of post-molding the concrete by providing a mold at the joint between the beam members, and the workability can be improved.

  In the first embodiment, the hollow tube 26 as a joining member is accommodated in the hole 22 of the sheath tube 20 provided in the upper member (the column beam joint member 56 of the upper column member 14 or the horizontal member 54). Then, the hollow tube 26 is pulled out from the hole 22 and inserted into the hole 32 as the insertion portion of the sheath tube 30 provided in the lower member (the lower beam member 12 or the column beam joint member 48 of the horizontal member 46). In this example, the hollow tube as the joining member is accommodated in the hole formed in the lower member, and the hollow tube is drawn upward from the hole of the lower column member, and the insertion portion formed in the upper member You may make it insert in the hole as. For example, as shown in FIG. 7, if the lower column member 12 and the upper column member 14 are bonded, a hollow tube as a bonding member is formed in the hole 62 formed by the sheath tube 68 provided in the lower column member 12. 26, the hollow tube 26 is drawn upward from the hole 62 of the lower column member 12, and is inserted into the hole 64 as an insertion portion formed by the sheath tube 70 provided in the upper column member 14. May be.

  In this case, the other end of the string 66 whose one end is fixed to the side surface of the lower column member 12 is fixed to the lower end portion of the hollow tube 26, and the string 66 is pulled upward to pull the hollow tube 26 upward. (See FIG. 7B). It is preferable to accommodate the hollow tube 26 in the upper member, because when the upper member is stored outdoors, rainwater or the like does not accumulate in the hole 22 and thus the hollow tube 26 can be prevented from rusting.

  Further, the hollow tube 26 as a joining member is accommodated in the hole 22 of the sheath tube 20 provided in the upper column member 14 or the horizontal member 54 by the string 38, and when the members are joined, the hollow tube 26 is Although the example pulled out downward was shown, the state which accommodated the hollow tube 26 in the upper member or the lower member is maintained until it joins members, and when necessary (when joining members), a hollow tube Any method can be used as long as 26 can be pulled out.

  Moreover, although the example which formed the hole 32 as the insertion part provided in the column beam joint member 48 of the lower column member 12 or the horizontal member 46 by the embedded sheath tube 30 was shown, the hollow tube 26 can be inserted. As long as a hole is formed, a tube material other than the sheath tube may be embedded. Alternatively, a hole may be formed by disposing a columnar member at a position where the hole is formed and removing the columnar member after the concrete has hardened. Moreover, you may form a hole by perforation.

  Moreover, although the example in which the hole 22 provided in the column beam joint member 56 of the upper column member 14 or the horizontal member 54 is formed by the embedded sheath tube 20 is shown, a hole that can be accommodated by the hollow tube 26 is formed. What is necessary is just to be carried out and you may embed pipe materials other than a sheath pipe | tube. Alternatively, a hole may be formed by disposing a columnar member at a position where the hole is formed and removing the columnar member after the concrete has hardened. Moreover, you may form a hole by perforation.

  Next, a second embodiment of the present invention will be described.

In the second embodiment, the hole 32 serving as the insertion portion of the joining member of the first embodiment is a space. Therefore, in the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.
As shown in the front view of FIG. 8A, in the PCa member joining structure 72, an upper column member 76 as an upper member formed of Pca on a lower column member 74 as a lower member formed of PCa. Is placed.

  As shown in FIG. 9 which is a BB sectional view of FIG. 8B, twelve column reinforcing bars 24 are arranged along the outer periphery of the upper column member 76 inside the upper column member 76. As shown in FIG. 8A, the column reinforcing bar 24 is arranged so that the lower end portion of the column reinforcing bar 24 does not protrude from the lower end surface of the upper column member 76.

  A rectangular parallelepiped space P is formed at the lower end of the upper column member 76, and the end of the column rebar 24 protrudes into the space P. An opening 78 is provided on the lower end surface of the upper column member 76, and an opening 80 is provided on one surface of the lower column side surface of the upper column member 76. The openings 78 and 80 are connected to the space P. That is, the three side surfaces of the space P are covered with walls.

  A plurality of shear reinforcing bars 34 are arranged at regular intervals in the vertical direction so as to surround the column reinforcing bars 24, and the column reinforcing bars 24 and the shear reinforcing bars 34 are integrated by the concrete V forming the upper column member 76.

Inside the lower column member 74, twelve column reinforcing bars 28 are arranged along the outer periphery of the lower column member 74. The column reinforcing bar 28 is arranged so that the upper end portion of the column reinforcing bar 28 does not protrude from the upper end surface of the lower column member 74.
A rectangular parallelepiped space Q as an insertion portion is formed at the upper end of the lower column member 74, and the end of the column rebar 28 protrudes into this space Q. An opening 82 is provided on the upper end surface of the lower column member 74, and an opening 84 is provided on one of the upper end side surfaces of the lower column member 74. The openings 82 and 84 are connected to the space Q. That is, the three side surfaces of the space Q are covered with walls.

Further, a plurality of shear reinforcement bars 36 are arranged at regular intervals in the vertical direction so as to surround the column reinforcing bars 28, and the column reinforcing bars 28 and the shear reinforcing bars 36 are integrated by the concrete V forming the lower column member 74.
The diameters of the column reinforcement 24 and the column reinforcement 28 are the same, and the planar arrangement of the column reinforcement 24 and the column reinforcement 28 is the same. That is, the end surfaces of the column reinforcement 24 and the column reinforcement 28 are opposed to each other.

  All twelve hollow tubes 26 are accommodated in the space P formed in the upper column member 76. That is, the hollow tube 26 as a joining member is accommodated in the upper column member 76. The hollow tube 26 is a plug-in type mechanical joint that can be inserted without screwing the column rebars 24 and 28. In the state of FIG. 8A, the end of the hollow tube 26 is an upper column member. It is inserted into the column reinforcement 24 so as not to protrude from the lower end surface of 76. Further, in this state, a plurality of shear reinforcing bars 34 surrounding the hollow tube 26 are arranged above the space P and are temporarily fixed to the hollow tube 26 by a binding bar or the like.

As in the first embodiment, the grout injection hole 44 is formed on the side surface of the lower column member 74, and the grout discharge hole 40 is formed on the side surface of the upper column member 76. The grout injection hole 44 is connected to the lower part of the space Q, and the grout discharge hole 40 is connected to the upper part of the space P.
In addition, the magnitude | size of the diameter of the column reinforcement 24 and the column reinforcement 28 does not need to be the same. When the diameters of the column reinforcing bars 24 and the column reinforcing bars 28 are different, a hollow tube that can connect column reinforcing bars having different diameters may be used.

  Next, the operation and effect of the second embodiment of the present invention will be described.

In the PCa member joining method, first, the upper column member 76 is placed on the lower column member 74 as shown in FIG.
Next, the lower column member 74 and the upper column member 76 are joined. As shown in FIGS. 8A and 8B, the joining method is such that the hollow tube 26 housed in the space P formed at the lower end of the upper column member 76 is lowered by its own weight, and the upper column member 76 is moved. It is pulled out from the space P and inserted into a space Q as an insertion portion formed at the upper end of the lower column member 74. At this time, the end portion of the column reinforcing bar 28 provided in the lower column member 74 is inserted into the hollow tube 26. FIG. 8A shows a situation before the lower pillar member 74 and the upper pillar member 76 are joined, and FIG. 8B shows a situation where the lower pillar member 74 and the upper pillar member 76 are joined. Yes.
The method for accommodating the hollow tube 26 in the space P and the method for drawing it out from the space P are the same as the method shown in FIG.

Therefore, the column reinforcement 28 provided on the lower column member 74 and the column reinforcement 24 provided on the upper column member 76 can be reliably connected by the hollow tube 26.
Further, since the hollow tube 26 as the joining member descends by its own weight and joins the lower column member 74 and the upper column member 76, the joining operation can be easily performed.
Further, when the upper column member 76 is placed on the lower column member 74, the hollow tube 26 is accommodated in the space P formed in the upper column member 76 and does not protrude from the upper column member 76. Thereby, the upper column member 76 placed on the lower column member 74 can be moved in the horizontal direction or in the horizontal direction. That is, after the upper column member 76 is placed on the lower column member 74, the position of the upper column member 76 can be adjusted.

  Next, after the end portion of the column reinforcing bar 28 provided in the lower column member 74 is inserted into the hollow tube 26 inserted in the space Q formed at the upper end portion of the lower column member 74, the opening 80, A hand or a tool is put into the spaces P and Q from 84, and the shear reinforcement bars 34 that are stacked above the space P in the state of FIG. They are arranged at regular intervals in the vertical direction. Then, the shear reinforcing bar 34 is fixed to the column reinforcing bar 24 and the hollow tube 26 with a binding wire or the like (state shown in FIG. 8B).

  Next, the outer peripheral portion of the gap space S formed between the lower end surface of the upper column member 76 and the upper end surface of the lower column member 74 is closed with the air hose 42, the mold, or the like, and the openings 80 and 84 are closed. Close with formwork. Further, the hardening material W is injected from the grout injection hole 44 formed substantially horizontally in the lower pillar member 74, and the excess hardening material W is discharged from the grout discharge hole 40 formed substantially horizontally in the upper pillar member 76. The hardener W is filled into the spaces P and Q, the hollow tube 26, and the gap space S. Then, the filled hardening material W is cured to fix the end portions of the column reinforcing bars 28 and 24 to the hollow tube 26, and the hollow tube 26, the column reinforcing bars 24 and 28, and the shear reinforcing bars 34 and 36 are integrated. .

  In the second embodiment, the lower member is the lower pillar member 74, the upper member is the upper pillar member 76, and the lower pillar member 74 and the upper pillar member 76 are joined. You may use this joining structure for joining with the horizontal member comprised by the beam member integrated with the column beam joint member and the beam member integrated with this column beam joint member.

  For example, a PCa column beam joint member 90 and a PCa beam member provided so as to project from the left and right side surfaces of the column beam joint member 90 as in the PCa member joint structure 86 shown in FIG. The column beam joint member 90 of the horizontal member 88 in which 50 and 52 are integrated may be used as the lower member.

In addition, the column beam joint member of the horizontal member composed of the column beam joint member and the beam member integrated with the column beam joint member is used as an upper member, and is accommodated in the column beam joint member of the horizontal member. In the case of a PCa member joining structure in which the joining member is pulled out and inserted into the insertion portion of the lower member, one of the two horizontal members placed next to each other on the lower column member is set in the vertical direction, the lateral direction, or It can be used in combination with various beam member joining methods for horizontally moving and joining the moved beam member of the horizontal member and the beam member of the other horizontal member. This PCa member joining structure can move horizontally or horizontally when the horizontal member is placed on the lower pillar member and after the horizontal member is placed on the lower pillar member. Alternatively, it is particularly effective when the beam members of the horizontal members are joined by moving horizontally.
The method of joining the beam members by moving the beam members (horizontal members) horizontally or horizontally as described above is to bring the end surfaces of the beam members into close contact with each other or the gap formed between the end surfaces of the beam members Can be reduced.
That is, it becomes possible to eliminate the work of post-molding the concrete by providing a mold at the joint between the beam members, and the workability can be improved.

  Further, the hollow tube 26 as the joining member is accommodated in the space P formed in the upper member (upper column member 76), and the hollow tube 26 is pulled out downward from the space P, so that the lower member (lower column member 74). Alternatively, an example of insertion into the space Q as the insertion portion formed in the column beam joint member 90) of the horizontal member 88 has been shown, but the hollow tube as the joining member is accommodated in the space formed in the lower member, A hollow tube may be drawn upward from the space of the lower column member and inserted into a space as an insertion portion formed in the upper member.

  In addition, the shape and size of the space P formed in the upper pillar member 76 may be any shape and size that can accommodate one or more hollow tubes 26, and a space that can accommodate all 12 hollow tubes 26. Alternatively, a plurality of spaces for accommodating one or more hollow tubes 26 may be provided. In addition, the shape and size of the space Q formed in the columnar joint member 90 of the lower column member 74 or the horizontal member 88 may be any shape or size in which one or more hollow tubes 26 can be inserted. A space where all the hollow tubes 26 can be inserted may be used, or a plurality of spaces into which one or more hollow tubes 26 may be inserted may be provided.

  For example, it is good also as the joining structure 92 of the PCa member as shown in FIG. 11 which is CC cross section of FIG. 11 and FIG. In the PCa member joining structure 92, a rectangular parallelepiped concrete block 96 integrated with the upper part of the upper pillar member 94 is left in the lower center of the upper pillar member 94, and a space M for accommodating the hollow tube 26 as a joining member. Is formed around the lower portion of the upper column member 94. Further, the rectangular concrete block 100 integrated with the lower portion of the lower column member 98 is left in the upper center of the lower column member 98, and the space N into which the hollow tube 26 as a joining member is inserted is the lower column member 98. It is formed around the top of the.

  The joining method using the hollow tube 26 as the joining member is the same as the PCa member joining structure 72 of FIG. When the spaces M and N are filled with the curing material W, the spaces M and N are covered with a mold. In the PCa member joining structure 92, the spaces M and N are open, so that the joining work is easy, and the amount of the hardened material filled by the concrete blocks 96 and 100 is small.

In addition, the opening 80 provided in the upper column member 76 and the opening 84 provided in the lower column member 74 are hands, tools, etc. in the spaces P and Q from the outside of the upper column member 76 and the lower column member 74. It is sufficient that the operation of placing the shear reinforcement bars 34 and 36 is possible, and a plurality of them may be provided. If a large opening is provided, the operation becomes easy. If the opening is small, the work for installing the mold can be reduced.
Further, it is preferable to provide a cotter inside the side walls covering the spaces P and Q, since the bonding strength between the hardened hardened material and the side wall is increased after the hardened material is filled.

  Next, a third embodiment of the present invention will be described.

  In the third embodiment, the joining member of the first embodiment is a bar. Therefore, in the description of the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

As shown in the front view of FIG. 13A, in the PCa member bonding structure 102, an upper column member 106 as an upper member formed of Pca on a lower column member 104 as a lower member formed of PCa. Is placed.
Inside the upper column member 106, twelve column reinforcing bars 24 are arranged along the outer periphery of the upper column member 106. As shown in FIG. 13A, the column reinforcing bar 24 is arranged so that the lower end portion of the column reinforcing bar 24 does not protrude from the lower end surface of the upper column member 106.

Twelve hollow tubes 108 are embedded in the lower end portion of the upper column member 106 along the outer periphery of the upper column member 106 so as not to protrude from the lower end surface of the upper column member 106, thereby forming a hole 110. Yes. The hollow tube 108 is disposed between the adjacent column reinforcing bars 24.
Further, a plurality of shear reinforcing bars 34 surrounding the column reinforcing bars 24 and the hollow tube 108 are arranged at regular intervals in the vertical direction, and are integrated by the concrete V forming the upper column member 106.

Twelve column reinforcing bars 28 are arranged along the outer periphery of the lower column member 104 inside the lower column member 104. As shown in FIG. 13A, the column reinforcing bar 28 is arranged so that the upper end portion of the column reinforcing bar 28 does not protrude from the upper end surface of the lower column member 104.
Twelve hollow tubes 112 are embedded in the upper end portion of the lower column member 104 along the outer periphery of the lower column member 104 so as not to protrude from the upper end surface of the lower column member 104, thereby forming a hole 114. Yes. The hollow tube 112 is disposed between the adjacent column reinforcing bars 28. Further, a reinforcing bar 118 embedded in the lower column member 104 and disposed substantially parallel to the column reinforcing bar 28 is inserted into the lower end portion of the hole 114 of the hollow tube 112.

A plurality of shear reinforcement bars 36 surrounding the column reinforcing bars 28 and the hollow tube 112 are arranged at regular intervals in the vertical direction, and are integrated by the concrete V forming the lower column member 104.
The diameters of the column reinforcement 24 and the column reinforcement 28 are the same, and the inner diameter and the outer diameter of the hollow tube 108 and the hollow tube 112 are the same. Further, the planar arrangement of the central positions of the column reinforcing bars 24 and the column reinforcing bars 28 and the planar arrangement of the central positions of the hollow tube 108 and the hollow tube 112 are the same. That is, the end surfaces of the column reinforcement 24 and the column reinforcement 28 and the end opening surfaces of the hollow tube 108 and the hollow tube 112 face each other.

  In the hole 110 of the hollow tube 108 provided in the upper column member 106, a reinforcing bar 116 as a bar member as a joining member is accommodated. That is, a reinforcing bar 116 as a joining member is accommodated in the upper column member 106. The hollow tubes 108 and 112 are insertion-type mechanical joints that can be inserted without screwing the pillar iron bar 116. In the state of FIG. 13A, the end of the reinforcing bar 116 is the upper pillar member 106. Is inserted into the hole 110 of the hollow tube 108 so as not to protrude from the lower end surface of the tube.

  As in the first embodiment, the grout injection hole 44 is formed on the side surface of the lower column member 104, and the grout discharge hole 40 is formed on the side surface of the upper column member 106. The grout injection hole 44 is connected to the lower part of the hole 114 of the hollow tube 112, and the grout discharge hole 40 is connected to the upper part of the hole 110 of the hollow tube 108.

  Next, operations and effects of the third exemplary embodiment of the present invention will be described.

In the PCa member joining method, first, the upper column member 106 is placed on the lower column member 104 as shown in FIG.
Next, the lower column member 104 and the upper column member 106 are joined. As shown in FIGS. 13A and 13B, the joining method is to lower the reinforcing bar 116 as a bar housed in the hole 110 of the hollow tube 108 provided in the upper column member 106 by its own weight. Then, the reinforcing bar 116 is drawn downward from the hole 110 of the hollow tube 108 and inserted into the hole 114 as an insertion portion of the hollow tube 112 provided at the upper end portion of the lower column member 104. FIG. 13A shows a situation before the lower pillar member 104 and the upper pillar member 106 are joined, and FIG. 13B shows a situation where the lower pillar member 104 and the upper pillar member 106 are joined. Yes.

  In the state shown in FIG. 13B, the reinforcing bar 116 as the joining member is overlapped in the longitudinal direction with respect to each of the column reinforcing bar 28 arranged on the lower column member 104 and the column reinforcing bar 24 arranged on the upper member. It arrange | positions and the lower pillar member 104 as a lower member and the upper pillar member 106 as an upper member are joined.

  The method of accommodating the reinforcing bar 116 into the hole 110 of the hollow tube 108 provided in the upper column member 106 and the method of pulling out the reinforcing bar 116 from the hole 110 are the same as the method shown in FIG. In this case, the end of the string 38 is fixed to the upper end of the reinforcing bar 116, the side surface of the upper column member 106 and the upper end of the reinforcing bar 116 are connected by the string 38, and the reinforcing bar 116 is viewed from above the hole 110. Should be hung.

Therefore, the reinforcing bar 116 as the joining member can be arranged without being greatly restricted by the arrangement and number of the column reinforcing bars 28 and 24 provided on the lower column member 104 and the upper column member 106.
Further, since the reinforcing bar 116 as the joining member descends by its own weight and joins the lower column member 104 and the upper column member 106, the joining operation can be easily performed.
Further, when the upper column member 106 is placed on the lower column member 104, the reinforcing bar 116 is accommodated in the hole 110 of the hollow tube 108 provided in the upper column member 106 and protrudes from the upper column member 106. Not. Thereby, the upper pillar member 106 placed on the lower pillar member 104 can be moved in the horizontal direction or the horizontal direction. That is, after the upper column member 106 is placed on the lower column member 104, the position of the upper column member 106 can be adjusted.

  Next, the outer peripheral portion of the gap space S formed between the lower end surface of the upper column member 106 and the upper end surface of the lower column member 104 is closed with an air hose 42, a formwork, etc. The hardening material W is injected from the formed grout injection hole 44, and the excess hardening material W is discharged from the grout discharge hole 40 formed substantially horizontally in the upper column member 106, and in the hollow tubes 108 and 112, and The gap material S is filled with the curing material W. Then, the filled hardening material W is hardened to fix the column reinforcing bars 116 to the hollow tubes 108 and 112.

In the state of FIG. 13 and the lower column member 104 and the upper pillar members 106 are joined (B), the upper column member 102 a length _{L 1} which overlapping and reinforcing steel bar 116 and the bar reinforcement 24 reinforcing steel bar 116 and the posts rebar within The length L _{2 in} which the reinforcing bars 116 and 118 and the column reinforcing bars 28 overlap each other in the lower column member 104 is set to be about 40 times the smallest diameter of the diameters of 24 and the reinforcing bars 116 and 118 and the column reinforcing bars. In order to secure sufficient bonding strength, it is preferable that the diameter is 28 times the smallest of the 28 diameters.
Further, when the number of the reinforcing bar bars 116 and 118 is smaller than that of the column reinforcing bars 24 and 28, it is preferable to increase the diameter of the reinforcing bar bars 116 and 118 in order to secure sufficient bonding strength.

  In the third embodiment, the lower member is the lower pillar member 104, the upper member is the upper pillar member 106, and the lower pillar member 104 and the upper pillar member 106 are joined. You may use this joining structure for joining with the horizontal member comprised by the column beam joint member and the beam member integrated with this column beam joint member.

  For example, as in the PCa member joining structure 120 shown in FIG. 14, a PCa column beam joint member 124 and a PCa beam member provided so as to protrude from the left and right side surfaces of the column beam joint member 124. The column beam joint member 124 of the horizontal member 122 in which 50 and 52 are integrated may be used as the lower member.

The upper member is a column beam joint member of a horizontal member constituted by a column beam joint member and a beam member integrated with this column beam joint member, and is accommodated in the column beam joint member of this horizontal member. In the case of a PCa member joining structure in which the joining member is pulled out and inserted into the insertion portion of the lower member, one of the two horizontal members placed next to each other on the lower column member is set in the vertical direction, the lateral direction, or It can be used in combination with various beam member joining methods for horizontally moving and joining the moved beam member of the horizontal member and the beam member of the other horizontal member. This PCa member joining structure can move horizontally when the horizontal member is placed on the lower pillar member and after the horizontal member is placed on the lower pillar member. This is particularly effective when the beam members of the horizontal members are joined by being moved.
The method of joining the beam members by moving the beam members (horizontal members) horizontally or horizontally as described above is to bring the end surfaces of the beam members into close contact with each other or the gap formed between the end surfaces of the beam members Can be reduced.
That is, it becomes possible to eliminate the work of post-molding the concrete by providing a mold at the joint between the beam members, and the workability can be improved.

  Moreover, although the example which formed the hole 114 as the insertion part provided in the column beam joint member 124 of the lower column member 104 or the horizontal member 122 with the embedded hollow tube 112 was shown, the reinforcing bar 116 can be inserted. A hole may be formed. For example, a cylindrical member may be arranged at a position where the hole is formed, and the hole may be formed by removing the cylindrical member after the concrete has hardened. Moreover, you may form a hole by perforation. Moreover, it is good also as a space which can insert one or more reinforcing bar 116 in an insertion part.

  Moreover, although the example which formed the hole 110 provided in the upper pillar member 106 with the embedded hollow tube 108 was shown, the hole which can accommodate the reinforcing bar 116 should just be formed. For example, a cylindrical member may be arranged at a position where the hole is formed, and the hole may be formed by removing the cylindrical member after the concrete has hardened. Moreover, you may form a hole by perforation. Moreover, it is good also as a space which can accommodate one or more reinforcing bars 116.

  Further, a reinforcing bar 116 as a joining member is accommodated in a hole 110 formed by a hollow tube 108 provided in the upper member (upper column member 106), and the reinforcing bar 116 is pulled out downward from the hole 110 to be lowered. Although the example which inserts this reinforcing bar 116 in the hole 114 as an insertion part of the hollow tube 112 provided in the member (the column beam joint member 124 of the lower column member 104 or the horizontal member 122) was shown, The reinforcing bar 116 as the joining member is accommodated in the provided hole, and the reinforcing bar 116 is pulled upward from the hole of the lower member and inserted into the hole as the insertion portion formed in the upper member. .

In addition, arrangement | positioning, the magnitude | size of a diameter, a shape, etc. of the column reinforcing bars 24 and 28 and the shear reinforcement bars 34 and 36 shown by the 1st-3rd embodiment are suitably selected according to the intensity | strength calculated | required by each member. Just decide.
In the first and second embodiments, the example in which all the column reinforcing bars 24 and the column reinforcing bars 28 provided on the members to be bonded are bonded by the hollow tube 26 is shown, but sufficient bonding strength can be obtained. For example, it is not necessary to join all the column reinforcing bars. The arrangement and number of the hollow tubes 26 may be determined as appropriate. In view of the bonding strength, it is preferable to join the column reinforcing bars arranged at the corners.

  In the first to third embodiments, the bolts 18 provided on the upper end surfaces of the column beam joint members 48, 90 of the lower column members 12, 74, 98, 104 and the horizontal members 46, 88 What is necessary is just to be able to adjust the installation height of the member placed on the member. Further, the bolts 18 may be eliminated so that the end surfaces of the members to be joined closely contact each other. In construction, it is preferable to provide a gap of about 20 mm between the end faces of the members to be joined.

  In the first to third embodiments, the horizontal members 46, 54, 88, 122 are projected from the column beam joint members 48, 56, 90, 124 and the left and right side surfaces of the column beam joint member 2. Although the example comprised by the two beam members 50 and 52 was shown, the number and arrangement | positioning of the beam member integrated with a column beam joint member are not restricted to this. You may use the horizontal member of the various shapes comprised by the one or more beam member integrated with the column beam joint member and this column beam joint member for the 1st-3rd embodiment.

In the first to third embodiments, the hollow tubes 26, 108, 112 are plug-in type mechanical joints. However, a screw-in type in which a female screw for screwing a column reinforcing bar is formed on the inner wall of the hollow tube. It may be a mechanical joint.
When the hollow tube is a screw-in type mechanical joint, in the second embodiment, spaces P, Q, M, and N are formed, and hands, tools, and the like are formed in the spaces P, Q, M, and N from the opening. Therefore, the operation of screwing the hollow tube 26 into the column rebar 28 can be easily performed. Further, in the third embodiment, when the hollow tubes 108 and 112 are screwed mechanical joints, the PCa member as shown in FIG. 15 which is a DD cross section of FIG. 15 and FIG. 15 is used. If the joining structure 126 or the joining structure 128 of the PCa member as shown in FIG. 18 which is an EE cross section of FIG. 17 and FIG. 17 is used, it becomes possible to put a hand or a tool into the space from the opening. Therefore, the operation of screwing the reinforcing bar 116 into the hollow tube 112 can be easily performed.

  Even when the hollow tubes 26, 108, 112 are screw-in type mechanical joints, like the ball screw, between the column reinforcing bars 24, 28 and the hollow tube 26, or between the reinforcing bar 116 and the hollow tubes 108, 112. If the grease or the like is sewn so as to reduce the friction between the hollow tube 26 and the reinforcing bar 116, the hollow tube 26 and the reinforcing bar 116 can be lowered by their own weight and screwed into the column reinforcing bar 28 and the hollow tube 112.

  In the PCa member bonding structure 126 of FIG. 15, a space F having an opening 132 provided on a side surface near the lower end of the upper column member 130 is formed in the upper column member 130 placed on the lower column member 104. Forming. Further, in the PCa member joining structure 128 of FIG. 17, a rectangular parallelepiped concrete integrated with the upper portion of the upper column member 134 around the lower end portion of the upper column member 134 placed on the lower column member 104. A space G having an opening 138 is formed leaving the block 136.

Moreover, what is necessary is just to use the grout material generally used for the hardening material W in the 1st-3rd embodiment, and a mortar, an epoxy resin, etc. can be used.
In addition, the column reinforcing bars 24 and 28 in the first to third embodiments may be those provided in the member, and may be column reinforcing bars embedded in the member or through holes formed in the member. It may be a column reinforcing bar that is inserted into the member and fixed to the member with a hardening material after insertion.

  In addition, the PCa member bonding structures 10, 58, 60, 72, 86, 92, 102, 120, 126, and 128 shown in the first to third embodiments may be used for a part of a building. It may be used for all. By constructing a building using the joint structure of these PCa members, a building with improved construction quality can be constructed.

  The first to third embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and the first to third embodiments may be used in combination. Of course, various embodiments can be implemented without departing from the scope of the present invention.

It is a front view which shows the joining structure of the precast concrete member which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the installation height adjustment method of the precast concrete member which concerns on the 1st Embodiment of this invention. It is AA sectional drawing of FIG. 1 (A). It is explanatory drawing which shows the joining method of the precast concrete member which concerns on the 1st Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 1st Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the modification of the joining method of the precast concrete member which concerns on the 1st Embodiment of this invention. It is a front view which shows the joining structure of the precast concrete member which concerns on the 2nd Embodiment of this invention. It is BB sectional drawing of FIG.8 (B). It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 2nd Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 2nd Embodiment of this invention. It is CC sectional drawing of FIG. It is a front view which shows the joining structure of the precast concrete member which concerns on the 3rd Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 3rd Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 3rd Embodiment of this invention. It is DD sectional drawing of FIG. It is a front view which shows the modification of the joining structure of the precast concrete member which concerns on the 3rd Embodiment of this invention. It is EE sectional drawing of FIG. It is a front view which shows the conventional column beam junction structure. It is a front view which shows the conventional column beam junction structure.

Explanation of symbols

10, 58, 60, 72, 86, 92, 102, 120, 126, 128 Joint structure of precast concrete member 12, 74, 98, 104 Lower pillar member (lower member)
14, 76, 94, 106, 130, 134 Upper column member (upper member)
24, 28 Column reinforcement 26 Hollow tube (joining member)
32 holes (insertion part)
48, 56, 90, 124 Column beam joint member 116 Reinforcing bar (bar, joint member)
N, Q space (insertion part)

Claims (9)

A lower member formed of precast concrete;
An upper member formed of precast concrete and placed on the lower member;
An insertion part formed in the lower member or the upper member, and comprising a hole or a space;
While being accommodated in the upper member or the lower member, pulled out from the upper member or the lower member and inserted into the insertion portion, a reinforcing bar disposed in the lower member and a reinforcing bar disposed in the upper member A joining member that is arranged to overlap each other in the longitudinal direction and joins the lower member and the upper member;
A joint structure for precast concrete members, comprising:   2. The precast concrete member according to claim 1, wherein the lower member and the upper member are a column member and a column member, a column member and a column beam joint member, or a column beam joint member and a column member. Junction structure. The joining member, while being accommodated in the upper member, the reinforcing bars disposed on the upper member and reinforcing bars arranged in the lower member is lowered by its own weight when joining and the lower member and the upper member The connection structure of the precast concrete member according to claim 1 or 2, wherein The precast according to any one of claims 1 to 3, wherein the joining member is a hollow tube that connects a reinforcing bar arranged in the lower member and a reinforcing bar arranged in the upper member. Bonding structure of concrete members. Wherein the joining member, characterized in that disposed next to the reinforcing bars disposed on the upper member and arranged reinforcing bars in the lower member is a rod for bonding the upper member and the lower member Item 4. The joint structure of precast concrete members according to any one of items 1 to 3. In the joining method of the precast concrete member for joining the lower member formed of the precast concrete and the upper member formed of the precast concrete and placed on the lower member,
The joining member accommodated in the upper member or the lower member is pulled out from the upper member or the lower member, and is inserted into an insertion portion formed in the lower member or the upper member and having a hole or a space. A precast concrete member joining method, wherein the lower member and the upper member are joined to each other in such a manner that they are overlapped in the longitudinal direction with respect to each of the placed reinforcing bars and the reinforcing bars placed on the upper member.   The precast concrete member according to claim 6, wherein the lower member and the upper member are a column member and a column member, a column member and a column beam joint member, or a column beam joint member and a column member. Joining method. The method for joining precast concrete members according to claim 6 or 7, wherein the joining member is a hollow tube that connects a reinforcing bar arranged in the lower member and a reinforcing bar arranged in the upper member. . Wherein the joining member, characterized in that disposed next to the reinforcing bars disposed on the upper member and arranged reinforcing bars in the lower member is a rod for bonding the upper member and the lower member Item 8. The method for joining precast concrete members according to item 6 or 7.

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