JP2017014766A - Grout injection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress inflow of a grout into a through-hole from another through-hole, for ensuring reliability of grout filling.SOLUTION: A grout injection method includes the following steps for: communicating a plurality of connection holes (sleeves 22) formed on a top edge surface 12A of a lower column member 12 with a through-hole (a sheath pipe 24) penetrating through a connection part 14A of a beam member (a first beam member 14) in a vertical direction using communicating means (a packing 26), and forming a gap 62A between the lower column member 12 and the connection part 14A; forming a gap 66A between an upper column member 18 and the connection part 14A while inserting a reinforcing bar (a column reinforcing bar 44) protruding from a lower edge surface 18A of the upper column member 18 into the through-hole, the communicating means and the connection hole; and injecting grout from the connection hole for filling the grout in the connection hole, the communicating means, and the through-hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grout injection method.

  Conventionally, in the grout injection method for a PC structure beam-column joint, grout is injected from one grout injection hole into a joint space between the PC column member and the PC beam / joint member, and the PC column is injected from the joint space. There is a type in which grout is injected into a plurality of mechanical joints formed in a member and a plurality of through holes formed in a PC beam / joint member (for example, see Patent Document 1).

JP 2009-97223 A

  In the above prior art, the grout is simultaneously filled into the plurality of through holes via the joint space. However, the filling is completed in the through hole having a short distance from the grout injection hole and the through hole having a long distance. There may be some variation in timing. In this case, the grout previously filled up to the upper end of the through hole overflows into the joint space on the upper surface of the PC beam / joint member, flows into the other through holes from the joint space, and an air pocket is generated inside the through hole. There is a possibility that reliable grout filling cannot be performed.

  In view of the above facts, the present invention aims to increase the certainty of grout filling by suppressing the inflow of grout from one through hole to another through hole.

  In the grout injection method of the first aspect of the present invention, a plurality of connection holes provided in the upper end surface of the lower column member and a through hole penetrating the joint portion of the beam member in the vertical direction are connected via a communication means. A step of forming a gap between the lower column member and the joint portion and a reinforcing bar protruding from the lower end surface of the upper column member were inserted into the through hole, the communication means and the connection hole. In the state, a step of forming a gap between the upper column member and the joint portion, and injecting grout from the connection hole, respectively, filling the connection hole, the communication means, and the through hole with grout And a step of performing.

According to the grout injection method for the outer wall of the first aspect, the connection hole and the through hole communicate with each other through the communication means. For this reason, it is possible to suppress the overflow of the grout between the connection hole and the through hole.
Further, since the grout is injected into each of the plurality of connection holes communicated with the through hole via the communication means, it can be visually confirmed for each through hole that the grout is filled up to the upper end of the through hole. For this reason, it can manage so that a grout may not flow into an adjacent through-hole through the clearance gap between an upper pillar member and the said joint part, and it can suppress that an air pocket arises in a grout. Therefore, the reliability of grout filling can be increased.

  The grout injection method according to the second aspect of the present invention is the grout injection method according to the first aspect, wherein the communication means includes a bellows portion.

According to the grout injection method of the second aspect, the bellows part of the communication means expands and contracts to absorb the variation in the height of the gap between the lower column member and the joint part. For this reason, since a connection means closely_contact | adheres to a lower pillar member and a joint part and a connection hole and a through-hole communicate, the effect which suppresses that the grout overflows between a connection hole and a through-hole is improved. be able to.
Therefore, it can manage so that a grout may not flow into the adjacent connection hole through the clearance gap between a lower column member and the said joint part, and can improve the certainty of grout filling.

  According to the present invention, it is possible to suppress the inflow of grout from one through hole to another through hole, and to increase the certainty of grout filling.

(A) is an elevational sectional view showing a column reinforcing bar embedded portion in the first embodiment of the present invention, (b) is an AA line plane sectional view of a lower column member, and (c) is a portion showing packing. FIG. (A) is an elevational sectional view showing a beam reinforcing bar embedded portion in the first embodiment of the present invention, and (b) is a sectional view taken along the line BB of a second beam member. It is an elevation view which shows the assembly procedure of the joining structure in 1st Embodiment of this invention, (a) shows the construction procedure of a 1st beam member, (b) is between a 1st beam member and a lower column member. The adjustment procedure of a clearance is shown, (c) shows the construction procedure of an upper column member. It is sectional drawing which shows the grout injection | pouring procedure in 1st Embodiment of this invention, (a) is an elevation sectional view of the column reinforcement embedding part which shows the state in the middle of grout injection, (b) is the bottom which shows the state in the middle of grout injection A cross-sectional view taken along line AA of the column member, (c) is an elevational sectional view of the column reinforcement embedded portion showing a state where grout injection is completed in the sheath tube, and (d) is a state where grout injection is completed in the sheath tube. It is an AA line plane sectional view of a lower pillar member. It is an elevation sectional view of a beam reinforcement embedding part which shows a grout injection procedure in a 1st embodiment of the present invention, (a) shows a state where grout is filled in a stigma joint space, (b) is a beam joint space, And (c) shows a state where grout is filled in the columnar joint space, and (d) shows a state where grout injection is completed. It is a perspective view of the joining structure of the column beam in 1st Embodiment of this invention. (A) is a sectional elevation view showing a column reinforcing bar embedded portion in the second embodiment of the present invention, and (b) is a plane sectional view taken along line AA of the first beam member and the second beam member.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
(Column beam connection structure)
1 and 2, the column beam joining structure 10 of this embodiment in which the lower column member 12, the first beam member 14, the second beam member 16, and the upper column member 18 formed of reinforced concrete are joined. It is shown. FIG. 6 is a perspective view of the column beam joining structure 10.
As shown in FIG. 6, the lower column member 12 and the upper column member 18 have the same horizontal cross section. In addition, the beam widths of the joint portion 14A of the first beam member 14 and the joint portion 16A of the second beam member 16 arranged between the lower column member 12 and the upper column member 18 are as follows. And the column width of the upper column member 18. Further, beam portions 14B and 16B having a beam width smaller than the column width are respectively extended in the horizontal direction from the joint portions 14A and 16A.

(Lower column member)
As shown in FIGS. 1 (a) and 1 (b), the lower column member 12 has a rectangular cross section, and a cylindrical sleeve 22 as an example of the connection hole of the present invention is provided so that the opening is located on the upper end surface 12A. Twelve are buried.
The sleeve 22 is a cast-iron insertion-type mechanical joint that can be inserted without screwing a reinforcing bar, and an end of a column reinforcing bar 42 provided on the lower column member 12 is inserted from the lower end surface.
The lower peripheral surface of the sleeve 22 communicates with the side surface of the lower column member 12 through a grout injection hole 22A formed of a vinyl chloride pipe. Further, a grout injection hole 22A is connected to each sleeve 22, and the grout is injected from the outer surface of the lower column member 12 to the sleeve 22 via the grout injection hole 22A.

(First beam member)
As shown in FIG. 1A, the first beam member 14 is provided with a joint portion 14A that is placed with a gap 62A provided on the upper portion of the lower column member 12, and extends horizontally from the joint portion 14A. Twelve sheath tubes 24 are embedded in the joint portion 14A as through holes that penetrate the upper end surface 14C and the lower end surface 14D of the joint portion 14A in the vertical direction.
The sheath tube 24 is formed of a wound tube (spiral sheath tube) manufactured by winding a steel strip, and has an inner diameter through which a column reinforcing bar 44 described later can penetrate.
In addition, although the sheath pipe | tube 24 of this embodiment is made from a steel plate, embodiment of this invention is not restricted to this, The product made from polyethylene etc. may be sufficient. Moreover, you may form only by a perforation without using a tubular body.
Further, as shown in FIG. 2A, a beam reinforcing bar 54 is provided as a beam main reinforcing bar inside the first beam member 14, and the beam reinforcing bar 54 extends in a horizontal direction from the side end face 14E of the joint portion 14A. The book protrudes. The beam reinforcing bar 54 has an outer diameter that can be inserted into a sleeve 30 of the second beam member 16 described later.

Four female screw anchors (not shown) are embedded in the lower end surface 14D of the joint portion 14A, and the adjustment bolt 100 is screwed into each female screw anchor.
The adjustment bolt 100 provides a gap 62A between the lower pillar member 12 and the joint portion 14A and adjusts the amount of screwing when the joint portion 14A is placed on the upper end surface 12A of the lower pillar member 12. Thus, the gap height and the level of the first beam member 14 can be adjusted.
Further, when four female screw anchors (not shown) are embedded in the upper end surface 14C of the joint portion 14A and the adjusting bolt 100 is screwed together, and the upper column member 18 is placed on the upper end surface 14C of the joint portion 14A. The height of the gap 66A provided between the upper end surface 14C of the joint portion 14A and the lower end surface 18A of the upper column member 18 and the verticality of the upper column member 18 can be adjusted.

(Second beam member)
As shown in FIGS. 2A and 2B, the second beam member 16 includes a joint portion 16A placed on the upper portion of the lower pillar member 12, and a beam extending in the horizontal direction from the joint portion 16A. 12 sleeves 30 are embedded so that the opening is located on the side end face 16E of the joint portion 16A.
Like the sleeve 22, the sleeve 30 is a cast-in mechanical joint made of cast iron that can be inserted without screwing a reinforcing bar. The sleeve 30 is provided on the second beam member 16 from the right end face in FIG. The ends of the beam reinforcing bars 52 are inserted.
The peripheral surface of the sleeve 30 communicates with the side surface of the second beam member 16 through a grout discharge hole 30F formed of a vinyl chloride pipe.
The side end face 16E of the second beam member 16 is provided with a recess 16F as a cotter for transmitting a shearing force between the first beam member 14 and the second beam member 16, and a beam joint space 64 to be described later is provided. It is considered a part.
In this embodiment, the concave portion 16F as a cotter is provided, but the concave portion 16F is not necessarily provided as long as a shearing force can be transmitted between the first beam member 14 and the second beam member 16. Also good.

(Upper column member)
As shown in FIG. 1A, the upper column member 18 has the same cross-sectional shape as the lower column member 12, and a column reinforcing bar 44 is provided as a column main reinforcement inside the upper column member 18. Twelve column reinforcing bars 44 protrude from the lower end surface 18A of the upper column member 18 in the vertical direction. The column reinforcing bar 44 has an outer diameter and a length that can be inserted into the sheath tube 24 of the joint portion 14 </ b> A of the first beam member 14 and the sleeve 22 of the lower column member 12.

(Packing)
As shown in FIG. 1 (c), a cylindrical vinyl chloride packing (joint sheath) 26 as a communication means is fitted into the lower end portion of the sheath tube 24. The packing 26 includes a cylindrical portion 26A and a bellows portion 26B. The cylindrical portion 26A is fitted into the opening on the lower end surface of the sheath tube 24, and the bellows portion 26B can be expanded and contracted in the cylinder axis direction.
When the joint portion 14A of the first beam member 14 is placed on the lower column member 12, the bellows portion 26B has a clearance 62A between the lower end surface 14D of the joint portion 14A and the upper end surface 12A of the lower column member 12. The lower end of the bellows part 26 </ b> B can be brought into close contact with the upper end surface 12 </ b> A of the lower column member 12 according to the gap height.
Thereby, when the joint portion 14A of the first beam member 14 is placed on the upper end surface 12A of the lower column member 12, the direction extending in the cylinder axis direction on the packing 26 (the direction indicated by the arrow in FIG. 1C). The lower end of the bellows portion 26B is brought into close contact with the upper end surface 12A of the lower column member 12, and the sleeve 22 and the sheath tube 24 communicate with each other through the packing 26 without any gap.

(Grout injection method)
Next, an example of a grout injection method for the junction structure 10 of this embodiment will be described with reference to FIG.
As shown in FIG. 3A, first, the joint portion 14 </ b> A of the first beam member 14 is placed on the lower column member 12. At this time, the position of the first beam member 14 is moved while being finely adjusted so that the sheath tube 24 of the joint portion 14A and the sleeve 22 of the lower column member 12 are arranged to overlap each other when viewed from the vertical direction.
At this time, the adjustment bolt 100 screwed into the lower end surface 14D of the joint portion 14A is placed on the upper end surface 12A of the lower column member 12. Further, the screwing amount of the adjusting bolt 100 is adjusted to adjust the gap 62A between the lower column member 12 and the first beam member 14 to a desired width.

A packing 26 (see FIG. 1C) is fitted in advance at the lower end portion of the sheath tube 24 that vertically passes through the joint portion 14A of the first beam member 14.
The bellows portion 26 </ b> B of the packing 26 is disposed in a contracted state, and is in close contact with the upper end surface 12 </ b> A of the lower column member 12 due to the urging force extending in the cylinder axis direction. For this reason, the sleeve 22 and the sheath tube 24 communicate with each other through the packing 26 without any gap.

Next, the beam protruding from the side end surface 14E of the first beam member 14 is formed on the sleeve 30 that opens to the side end surface 16E of the second beam member 16 in a state where the joint portion 14A is disposed above the lower column member 12. The second beam member 16 is moved laterally in the direction indicated by the arrow in FIG.
At this time, an adjustment bolt (not shown) provided on the lower end surface of the joint portion 16 </ b> A of the second beam member 16 is placed on the upper end surface 12 </ b> A of the lower column member 12.

Next, as shown in FIG. 3C, the lower end surface 18 </ b> A of the upper column member 18 is inserted into the sheath tube 24 that vertically penetrates the joint portion 14 </ b> A of the first beam member 14 and the sleeve 22 of the lower column member 12. The upper column member 18 is moved in the direction indicated by the arrow in FIG.
Further, the lower end surface 18A of the upper column member 18 is placed on the adjustment bolt 100 screwed into the upper end surface 14C of the joint portion 14A, and the screwing amount of the adjustment bolt 100 is adjusted to adjust the first bolt. A gap 66A (see FIG. 1A) between the beam member 14 and the upper column member 18 is adjusted to a desired height.

Next, as shown in FIGS. 4A and 4B, grout is injected from the grout injection hole 22 </ b> A of the sleeve 22.
The grout injection hole 22A is connected to the lower peripheral surface of the sleeve 22, and since the sleeve 22 communicates with the sheath tube 24 of the first beam member 14 via the packing 26, the grout is injected from the grout injection hole 22A. As a result, the sheath tube 24 is continuously filled with grout.
Then, as shown in FIGS. 4C and 4D, it is visually confirmed from the outside that the grout is filled up to the upper end portion of the sheath tube 24, that is, the vicinity of the upper end surface 14C of the first beam member 14, and the grout is confirmed. Finish filling. In this way, all the sheath tubes 24 are filled with grout one by one. In addition, although filling is confirmed visually in this embodiment, embodiment of this invention is not restricted to this. For example, the injection amount and the injection time may be measured, and filling may be completed when a predetermined value is reached.

Next, as shown in FIG. 6, the gap 62 </ b> A between the lower column member 12 and the first beam member 14, the joint portion 14 </ b> A of the first beam member 14, and the joint portion 16 </ b> A of the second beam member 16. The gap 64A between the gap 66A and the gap 66A between the joint portion 14A and the upper column member 18 are sealed with an air tube 60 as a joint member.
Specifically, the air tube 60 </ b> A is disposed so as to contact the entire outer peripheral portion of the upper end surface 12 </ b> A of the lower column member 12. At this time, the air tube 60A is disposed so as to contact the lower end surface 14D of the joint portion 14A of the first beam member 14 and the lower end surface 16D of the joint portion 16A of the second beam member 16 as well.
Further, the air tube 60B is disposed so as to contact the entire outer peripheral portion of the lower end surface 18A of the upper column member 18. At this time, the air tube 60B is disposed so as to be in contact with the upper end surface 14C of the joint portion 14A of the first beam member 14 and the upper end surface 16C of the joint portion 16A of the second beam member 16.
Further, the air tube 60C is arranged in the vertical direction so as to contact the side end face 14E of the joint portion 14A of the first beam member 14 and the side end face 16E of the joint portion 16A of the second beam member 16, respectively. The tube 60A and the air tube 60B are connected.
The air tube 60 to which these air tubes 60A, 60B, and 60C are connected, and the column head joint space 62, the beam joint space 64, and the column base shown in FIGS. A joint space 66 is formed.
In this embodiment, the joint member is the air tube 60. However, the embodiment of the present invention is not limited to this as long as the periphery of the gap can be sealed. For example, solid mortar may be sealed in the gap.

Next, as shown in FIG. 5A, grout is injected from the grout injection hole 60E.
The grout injection hole 60E communicates from the outside of the first beam member 14 to the end of the columnar joint space 62 through the inside of the first beam member 14, and when grout is injected from the grout injection hole 60E, the columnar joint space 60E. 62 is filled with grout.

  When the stigma joint space 62 is filled with grout, the beam joint space 64 and the sleeve 30 are filled with grout, as shown in FIG. Completion of grout filling of the sleeve 30 can be confirmed by visually observing the grout discharged from the grout discharge hole 30F.

  When the beam joint space 64 and the sleeve 30 are filled with grout, the columnar joint space 66 is filled with grout as shown in FIG.

  Then, as shown in FIG. 5D, it is visually confirmed from the outside that the grout is discharged from the grout discharge hole 60F, and the filling of the grout is finished.

(Function)
According to the grouting method of the above embodiment, the sleeve 22 and the sheath tube 24 communicate with each other through the packing 26 without any gap. For this reason, the sheath tube 24 is continuously filled with grout by injecting grout from the grout injection hole 22A of the sleeve 22.
Further, the bellows portion 26 </ b> B of the packing 26 expands and contracts according to the gap height between the first beam member 14 and the lower column member 12, and the lower end is in close contact with the upper end surface 12 </ b> A of the lower column member 12. For this reason, it is possible to prevent the grout from overflowing into the gap between the first beam member 14 and the lower column member 12.
Therefore, it can manage so that a grout may not flow into the adjacent sleeve 22 through the clearance gap between the 1st beam member 14 and the lower pillar member 12, and can improve the reliability of grout filling.

  Further, since the grout is injected into each of the plurality of sleeves 22, it can be visually confirmed for each sheath tube 24 that the grout is filled up to the upper end portion of the sheath tube 24, that is, the vicinity of the upper end surface 14C of the first beam member 14. For this reason, it can manage so that a grout may not flow into the adjacent sheath pipe | tube 24 through the clearance gap between the connection part 14A of the 1st beam member 14, and the upper pillar member 18, and an air pocket does not arise in a grout. Therefore, the reliability of grout filling can be increased.

  In addition, according to the grout injection method of the above embodiment, the grout is injected from one grout injection hole 60E, so that it continues to the columnar joint space 62, the beam joint space 64, the sleeve 30, and the columnar joint space 66. Then the grout is filled. Therefore, the trouble of filling the grout can be reduced.

  In addition, the grout becomes a one-sided flow that flows from one place toward the beam joint space 64. For this reason, generation | occurrence | production of an air pocket can be suppressed compared with the case where grout is filled from multiple places. Therefore, the reliability of grout filling can be increased.

  Further, since the column reinforcing bar 44 penetrating the sheath tube 24 protrudes from the lower end surface 18A of the upper column member 18 installed after the first beam member 14, it is not applied when installing the first beam member 14. is there. For this reason, the first beam member 14 can be placed on the lower column member 12 while laterally moving the first beam member 14 to adjust the position in the horizontal direction. Therefore, the beam joint space 64 having an accurate size can be obtained. Thereby, the 1st beam member 14 and the 2nd beam member 16 can be joined reliably.

  Further, according to the grouting method of the above embodiment, since the concave portion 16F is provided on the side end face 16E of the second beam member 16, the first beam after the grout filled in the beam joint space 64 is hardened. A shear force can be transmitted between the member 14 and the second beam member 16 as a cotter.

[Second Embodiment]
Next, the grouting method of the second embodiment will be described. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

As shown in FIGS. 7A and 7B, in the second embodiment, the side end face 14E of the joint portion 14A of the first beam member 14 and the side end face of the joint portion 16A of the second beam member 16 are shown. A gap 64 </ b> A between the lower column member 12 and the upper column member 18 is formed so as to straddle the column core CL of the upper column member 18.
The sheath tube 24 includes a joint portion 14A of the first beam member 14 and a joint portion 16A of the second beam member 16.
The column rebars 44 are embedded in the upper column member 18 and protrude in the vertical direction from the lower end surface of the upper column member 18.
Further, the adjustment bolts 100 are screwed into female screw anchors (not shown) embedded in two at the lower end surface 14D of the joint portion 14A and two at the lower end surface 16D of the joint portion 16A.

(Function)
According to the grout injection method of the second embodiment, since the sheath tube 24 is also embedded in the joint portion 16A of the second beam member 16, the column reinforcing bar 44 penetrates the joint portion 16A of the second beam member 16. . Therefore, the bonding strength to the lower column member 12 and the upper column member 18 of the second beam member 16 is increased.
Further, a gap 64A between the side end face 14E of the joint portion 14A of the first beam member 14 and the side end face 16E of the joint portion 16A of the second beam member 16 forms the lower column member 12 and the upper column member 18. Therefore, the column beam joint structure 11 has a bilaterally symmetrical structure with the column core CL interposed therebetween. Therefore, a well-balanced frame with stable mechanical characteristics can be formed.

[Modification]
Next, a modification of the above embodiment will be described.

  In the above embodiment, the beam reinforcing bar 54 protruding from the first beam member 14 is inserted into the sleeve 30 provided in the second beam member 16, but the embodiment of the present invention is not limited to this. For example, a sleeve may be provided on the first beam member 14 and a beam reinforcing bar protruding from the second beam member 16 may be inserted into the sleeve. Thereby, since a sleeve and a sheath pipe | tube can be concentrated and embedded at the 1st beam member, the manufacturing efficiency of a precast member can be raised.

  Moreover, in the said embodiment, although the cylindrical part 26A of the packing 26 shall be fitted in the sheath pipe | tube 24 of the 1st beam member 14, embodiment of this invention is not restricted to this. For example, even if the cylindrical portion 26A is fitted into the sleeve 22 of the lower column member 12, the effect of allowing the sleeve 22 and the sheath tube 24 to communicate with each other without a gap does not change.

  Moreover, in the said embodiment, although the packing 26 was used as a communication means, embodiment of this invention is not restricted to this. For example, a groove portion concentric with the sleeve 22 may be provided around the opening of the sleeve 22 of the lower column member 12, and a metal tube may be engaged with the groove portion. Accordingly, the sleeve 22 and the sheath tube 24 are communicated with each other, and the first beam member 14 can be placed on the upper portion of the metal tube, so that the adjustment bolt 100 can be omitted. Further, for example, an open cell foam formed in an annular shape may be used. The foam has a structure in which the grout soaked stays inside the foam, so that the grout is also filled in the bubbles of the foam and the sleeve 22 and the sheath tube 24 are filled, and the stigma space. The grout filled in 62 can be integrated.

  Further, in the above embodiment, after the joint portion 14A of the first beam member 14 is placed on the lower pillar member 12, the joint portion 16A of the second beam member is placed on the lower pillar member 12. However, the embodiment of the present invention is not limited to this. For example, the fitting portion 14A of the first beam member 14 may be placed on the lower column member 12 after the fitting portion 16A of the second beam member is placed on the lower column member 12. Moreover, although the adjustment bolt provided in the lower end surface of the joint part 16A of the 2nd beam member 16 shall be mounted in the upper end surface 12A of the lower pillar member 12, the 2nd beam member 16 is supporting work or others In the case of being supported by the column member, the adjustment bolt may not be provided, and the second beam member 16 may not be placed on the lower column member 12.

Further, in the above embodiment, the grout is injected from the grout injection hole 60E, and the grout is filled in order into the columnar joint space 62, the beam joint space 64, the sleeve 30, and the columnar joint space 66. The embodiment is not limited to this.
For example, the grout discharge hole 30F connected to the sleeve 30 may be used for injecting grout. In this case, the grout flows along the sleeve 30, and the grout is first filled in the stigma joint space 62, and then the grout is filled in the beam joint space 64 and the sleeve 30. The grout is press-fitted into the sleeve joint 30 and the portion of the beam joint space 64 that is higher than the sleeve 30 to which the grout discharge hole 30F for injecting grout is connected (upward in the vertical direction). When the beam joint space 64 is filled with grout, the column base joint space 66 is filled with grout.
At this time, since the grout is injected from the grout discharge hole 30F, it is not necessary to provide the grout injection hole 60E. Therefore, the manufacture of the first beam member 14 can be simplified. Further, if a plurality of grout discharge holes 30F are used for grout injection, the grout filling speed can be increased.

  As described above, in the embodiment of the present invention, the grouting portion and the number of the grouting portions for filling the cereal joint space 62, the beam joint space 64, and the pier joint space 66 with grout are not limited. May be injected from any one of the grout injection hole 60E, the grout discharge hole 30F, a grout injection hole communicating with a separately provided beam joint space, or a combination thereof. That is, the injection location and the number of locations can be appropriately selected in consideration of the workability on site.

  In the above-described embodiment, all the sheath tubes 24 are filled with grout one by one. However, the embodiment of the present invention is not limited to this. For example, grout may be simultaneously injected into all the grout injection holes 22A using a distributor. If a distributor is used, grout can be filled in all the sheath tubes 24 at the same timing. Furthermore, the grout filling workability can be improved.

  In the above embodiment, twelve sleeves 22 and 30 sleeves are embedded, but the embodiment of the present invention is not limited to this. For example, the number of the sleeves 22 and the sleeves 30 can be reduced by using high-strength reinforcing bars for the beam reinforcing bars 54 and the column reinforcing bars 42. Further, for example, when not only the beam main bars but also the joint connection bars are inserted into the sleeve 30, the number of the sleeves 30 may be increased. In addition, it can be appropriately changed depending on the shape of the columns and beams, the joining method, and the like.

  In the above embodiment, four female screw anchors are embedded in each of the lower end surface 14D and the upper end surface 14C of the joint portion 14A of the first beam member 14, and the adjustment bolt 100 is screwed together. However, the embodiment of the present invention is not limited to this. For example, even if there are three, it is possible to adjust the width and level of the gap between the joint portion 14A and the lower column member 12, and between the joint portion 14A and the upper column member 18. Alternatively, when level adjustment is not necessary, the upper end surface 12A of the lower column member 12, the lower end surface 14D of the joint portion 14A, the upper end surface 14C of the joint portion 14A, and the lower end surface 18A of the upper column member 18 are projected during precast molding. It is good also as what provides a gap | interval between the lower column member 12, the joint part 14A, and the upper column member 18 by providing a strip part.

  Further, in the above-described embodiment, the column width from the joint portion 14 </ b> A of the first beam member 14 and the joint portion 16 </ b> A of the second beam member 16 configured to be the same as the column width of the lower column member 12 and the upper column member 18. Although the beam portions 14B and 16B having a smaller beam width are extended in the horizontal direction, the embodiment of the present invention is not limited to this. For example, a beam portion having the same beam width as the column width may be extended in the horizontal direction.

  As mentioned above, although the example of embodiment of this invention was demonstrated, this invention is not limited to such embodiment, You may use suitably one embodiment and various modifications, and the summary of this invention Needless to say, the present invention can be implemented in various forms without departing from the scope of the invention.

12 Lower column member 14 First beam member (beam member)
16 Second beam member 14A, 16A Joint 18 Upper column member 22 Sleeve (connection hole)
24 Sheath tube (through hole)
26 Packing (communication means)
26B Bellows part 44 Column reinforcement (rebar)
54 Beam reinforcement 60 Air tube 62 Column head joint space 62A Clearance 64 Beam joint space 64A Clearance 66 Column base joint space 66A Clearance

Claims (2)

A plurality of connection holes provided in the upper end surface of the lower pillar member and a through hole penetrating the joint portion of the beam member in the vertical direction are communicated via a communicating means, and the lower pillar member and the joint Forming a gap with the part,
Forming a gap between the upper column member and the joint portion in a state where a reinforcing bar protruding from a lower end surface of the upper column member is inserted into the through hole, the communication means, and the connection hole;
Injecting grout from each of the connection holes, filling the connection holes, the communication means, and the through holes with grout;
A grout injection method comprising:   The grout injection method according to claim 1, wherein the communication means includes a bellows portion.

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