JP2011169058A - Grout injecting method, joint structure, and building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce or eliminate air stagnation formed in filling grout in an upper joint in a joint part of a precast concrete member. <P>SOLUTION: This grouting method includes a lower joint forming process, an upper joint forming process and a grout filling process. In the grout filling process, grout W is supplied into a lower joint space 54 to fill the lower joint space 54, a through-hole 28 and an upper joint space 56 with the grout W, and air Q in the upper joint space 56 is exhausted through an air vent passage 60. Air stagnation formed in the upper joint space 56 can thereby be reduced or eliminated. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for injecting a grout into a joint at a joint portion of a precast concrete member, a joint structure using the grout injection method, and a building having the joint structure.

  When joining a precast concrete member to a concrete member, generally, the joint of the joint part is filled with grout and the concrete member and the precast concrete member are integrated.

  As shown in FIG. 26, in the grout injection method in the beam-column joint structure of a building of Patent Document 1, a column sleeve 504 is embedded in a column head 502 of a precast concrete column 500 on the lower floor. The connecting reinforcing bars 506 for the columns of the precast concrete column 500 on the upper floor are inserted into the sleeve 504. Then, by supplying the grout to the lower joint 510 for the column joint 508, the grout is continuously filled in the order of the lower joint 510, the through hole 512, and the upper joint 514.

  In the grout injection method of Patent Document 1, when the planar shape of the upper joint 514 is square and the through holes 512 are evenly arranged along the outer periphery of the upper joint 514, the grout is formed from the through joint 512. By flowing toward the plane center of 514, air is collected at the plane center of the upper joint 514. Therefore, if the discharge pipe 516 is provided so as to communicate with the plane center portion of the upper joint 514, the collected air is discharged from the discharge pipe 516, so that no air pocket is formed in the upper joint 514.

  However, when the planar shape of the upper joint 514 is a flat shape such as a rectangle, or when the through holes 512 are not evenly arranged along the outer periphery of the upper joint 514, the central portion of the upper joint 514 is flat. It is conceivable that air gathers at a place other than the above to form an air pocket.

  That is, in the grout injection method in which grout flows from the lower joint to the upper joint via the through hole, there is a concern that an air pocket is formed due to the planar shape of the upper joint and the arrangement of the through holes.

JP 2006-144251 A

  This invention considers the fact which concerns, and makes it a subject to reduce or eliminate the air pocket formed when filling up the upper joint in the junction part of a precast concrete member with grout.

  In the first aspect of the present invention, the intermediate member made of precast concrete in which the through-hole is formed is placed with a gap on the upper surface of the concrete lower member, and the periphery of the gap is sealed with a sealing member. A lower joint forming step for forming joint space, and an upper member made of precast concrete is placed on the upper surface of the intermediate member with a gap therebetween, and the lower member and the intermediate member through a reinforcing bar penetrating the through hole And the upper member are connected, and the periphery of the gap is sealed with a sealing member to form an upper joint space, and the lower joint space and the penetration are formed by supplying grout to the lower joint space. The grout is filled in the hole and the upper joint space, and air inside the upper joint space is exhausted to the outside of the seal member through an air vent passage provided in the upper joint space. It has a grout filling step.

  In the invention described in claim 1, the grout injection method includes a lower joint formation step, an upper joint formation step, and a grout filling step.

  In the lower joint forming step, an intermediate member made of precast concrete is placed with a gap formed on the upper surface of the concrete lower member. And the circumference | surroundings of the clearance gap opened in the upper surface of the lower member are sealed with a sealing member, and a lower joint space is formed. A through hole is formed in the intermediate member.

  In the upper joint forming step, the upper member made of precast concrete is placed with a gap on the upper surface of the intermediate member. And the periphery of the clearance gap opened in the upper surface of the intermediate member is sealed with a sealing member, and an upper joint space is formed. In addition, the upper member is placed on the upper surface of the intermediate member, and the lower member, the intermediate member, and the upper member are coupled via a reinforcing bar that penetrates the through hole.

  In the grout filling process, the grout is supplied to the lower joint space to fill the lower joint space, the through hole, and the upper joint space, and air inside the upper joint space to the outside of the seal member through the air vent passage. Exhaust. The air vent passage is provided in the upper joint space.

  Here, when the planar shape of the upper joint space is square and the through holes are evenly arranged along the outer periphery of the upper joint space, when the grout is filled into the upper joint space, the lower joint space The grout fed to the upper joint space through the through hole spreads almost uniformly from the through hole and flows toward the center of the plane of the upper joint space. As a result, air is collected at the center of the plane of the upper joint space, so if a grout discharge pipe is provided so as to communicate with the center of the plane of the upper joint space, air is discharged together with the grout from the grout discharge pipe. An air pocket is not formed in the upper joint space.

  However, if the planar shape of the upper joint space is a flat shape such as a rectangle, or if the through holes are not evenly arranged along the outer periphery of the upper joint space, Even if the grout discharge pipe is provided so as to communicate with each other, it is conceivable that air collects at a place other than the central plane of the upper joint space to form an air pocket.

  On the other hand, in the grout injection method according to the first aspect, the air inside the upper joint space is exhausted to the outside of the seal member through the air vent passage, so that the air vent passage is provided so that the intake port is located where the air gathers. In this case, air pockets formed in the upper joint space can be reduced or eliminated without being greatly influenced by the planar shape of the upper joint space and the arrangement of the through holes. As a result, it becomes possible to densely fill the upper joint space with the grout, so that the intermediate member and the upper member can be reliably joined.

  According to a second aspect of the present invention, the upper member is placed on the upper surface of the intermediate member, and the reinforcing bar provided on the upper member and projecting from the lower surface of the upper member is passed through the through-hole. Insert into the insertion hole formed in the lower member.

  In the invention according to claim 2, the reinforcing bar is provided on the upper member and protrudes from the lower surface of the upper member. Further, an insertion hole is formed in the lower member. Then, the upper member is placed on the upper surface of the intermediate member, and the reinforcing bar protruding from the lower surface of the upper member is inserted through the through hole of the intermediate member and inserted into the insertion hole of the lower member.

  Therefore, a reinforcing bar provided in the upper member and projecting downward is inserted into the insertion hole provided in the lower member through the through hole of the intermediate member, and the lower member, the intermediate member and the upper member are integrated. The effect similar to that of the first aspect can be obtained for the “reverse insertion method”.

  According to a third aspect of the present invention, the air vent passage is a pipe member provided in the upper joint space and having an exhaust port located outside the seal member.

In the invention according to claim 3, the air vent passage is a pipe provided in the upper joint space. The exhaust port of the pipe material is located outside the seal member.
Therefore, by providing the pipe material in the upper joint space, it is possible to provide the air vent passage without performing special processing on the upper member, the intermediate member, or the like.

  According to a fourth aspect of the present invention, the tube material is inserted into an outer tube sandwiched between the seal members.

  In the invention according to claim 4, since the pipe material as the air vent passage is inserted into the outer tube sandwiched between the seal members, the seal member is not removed in order to harden the grout filled in the upper joint space. Only the pipe material can be removed (pulled out).

  According to a fifth aspect of the present invention, the air vent passage is a groove formed on the lower surface of the upper member and extending from the inside of the upper joint space to the outer peripheral portion.

In the invention according to claim 5, the air vent passage is a groove formed in the lower surface of the upper member. The groove extends from the inside of the upper joint space to the outer peripheral portion.
Therefore, the size of the cross section of the air vent passage can be set without being affected by the size (height) of the gap in the upper joint space. In addition, there is no fear that the position of the air vent passage is shifted when the upper joint space is filled with grout.

  According to a sixth aspect of the present invention, in the plan view, the intake port of the air vent passage is located at the center of a quadrilateral having four corners as the center of the through hole.

  In the invention according to claim 6, the air intake passage is located at a position where the air in the upper joint space is likely to gather by positioning the air intake passage in the air vent passage in the center of the quadrangle having the four corners as the center of the through hole in plan view. Can be arranged. Thereby, the air pocket formed in the upper joint space can be efficiently reduced or eliminated.

  According to a seventh aspect of the present invention, the lower member and the upper member are columns, and the intermediate member is a column beam joining member in which beams are integrally provided.

  According to the seventh aspect of the present invention, the same effect as in the first aspect can be obtained in a configuration in which the lower member and the upper member are columns, and the intermediate member is a column beam-joining member in which beams are integrally provided.

  Invention of Claim 8 is a joining structure which has the said lower member, the said intermediate member, and the said upper member which were united by the grout injection | pouring method of any one of Claims 1-7.

  In the invention according to claim 8, in the joint structure having the lower member, the intermediate member, and the upper member integrated by the grout injection method according to any one of claims 1 to 7, An effect can be obtained.

  The invention according to claim 9 is a building having the joint structure according to claim 8.

  In the invention according to the ninth aspect, the same effect as that of the first aspect can be obtained in the building having the joint structure according to the eighth aspect.

  Since this invention set it as the said structure, the air pocket formed when filling grout into the upper joint in the junction part of a precast concrete member can be reduced or eliminated.

1 is a perspective view showing a joint structure according to a first embodiment of the present invention. It is explanatory drawing which shows the joining method of the pillar which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the joining method of the beam which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the installation height adjustment method of the member which concerns on the 1st Embodiment of this invention. It is an elevation view which shows the construction method of the building which concerns on the 1st Embodiment of this invention. It is an elevation view which shows the construction method of the building which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the grout filling process which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the grout filling process which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the fixing method of the pipe material which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the method to set the position of the inlet port of the pipe material which concerns on the 1st Embodiment of this invention. It is a top view which shows arrangement | positioning of the groove | channel which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the groove | channel which concerns on the 2nd Embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the grout supply method to the lower joint space which concerns on embodiment of this invention. It is explanatory drawing which shows the application example of the grout injection | pouring method which concerns on embodiment of this invention. It is explanatory drawing which shows the application example of the grout injection | pouring method which concerns on embodiment of this invention. It is explanatory drawing which shows the application example of the grout injection | pouring method which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the joining method of the beam which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the joining method of the beam which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the joining method of the beam which concerns on embodiment of this invention. It is explanatory drawing which shows the conventional grout injection | pouring method.

  Embodiments of the present invention will be described with reference to the drawings. In the embodiment of the present invention, an example of joining precast members (lower member, intermediate member and upper member) formed of reinforced concrete is shown. However, the embodiment of the present invention is made of concrete such as steel reinforced concrete or prestressed concrete. The present invention can be applied to joining various formed precast members.

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

  As shown in the perspective view of FIG. 1, the joining structure 10 of the first embodiment includes a column 12 as a lower member, a column beam joining member 14 as an intermediate member, and a column 16 as an upper member. ing. Further, a horizontal structure 22 is constituted by the column beam joining member 14 and the beams 18 and 20 provided integrally on the left and right of the column beam joining member 14.

  The columns 12 and 16 and the horizontal structure 22 are precast concrete members formed of reinforced concrete. Further, the upper and lower end surfaces of the columns 12 and 16 and the column beam connecting member 14 are all the same shape, and form a rectangular shape in which the sides in the beam length direction of the beams 18 and 20 are long sides.

  The joint structure 10 has a horizontal structure 22 (column-beam joining member 14) placed on the top surface of the column 12 with a gap, and a column 16 placed on the top surface of the column-beam joint member 14 with a gap, It is constructed by integrating the column 12, the horizontal structure 22 (column-beam connecting member 14), and the column 16 using a grout injection method described later.

  The column 16 is provided with eight column reinforcing bars 24 protruding downward from the lower surface of the column 16 as reinforcing bars. Further, as shown in the front view of FIG. 2B, a grout discharge hole 26 that penetrates from the lower surface of the column 16 to the side surface is formed in an L shape in the column 16. The inflow port 64 (lower end) of the grout discharge hole 26 is located at the approximate center of the bottom surface of the column 16.

  As shown in the front view of FIG. 2A, the column-beam joining member 14 of the horizontal structure 22 has eight through-holes 28 through which the column reinforcing bars 24 penetrate vertically.

  As shown in FIG. 1, the beam 18 is provided with eight beam reinforcing bars 30 protruding from the end face of the beam 18, and eight hollow tubes 32 are embedded in the end portion of the beam 20. As shown in the front view of FIG. 3 (a), the hollow tube 32 is a plug-in mechanical joint that can be inserted without screwing the beam rebar 30, and the beam rebar provided on the beam 20. The right end portion of 30 is inserted.

  A grout injection hole 34 for injecting grout from one end of the hollow tube 32 and a grout discharge hole 36 for discharging grout from the other end of the hollow tube 32 are formed on the side surface of the end portion of the beam 20. . As shown in FIG. 2A, the horizontal structure 22 is formed with a grout supply hole 38 penetrating from the upper surface of the beam 20 to the lower surface of the beam-column joining member 14. The outlet 100 (lower end) of the grout supply hole 38 is located at the approximate center of the lower surface of the beam-column joining member 14.

As shown in FIG. 2A, eight hollow tubes 40 are embedded in the upper end portion of the column 12, and the hollow portion of the hollow tube 40 serves as an insertion hole. The hollow tube 40 is a plug-in mechanical joint that can be inserted without screwing the column rebar 24, and the upper end portion of the column rebar 24 provided on the column 12 is inserted. Further, the column reinforcement 24 and the hollow tube 40 provided on the column 12 do not protrude from the upper end surface of the column 12.
The upper end portion of the column 16 has the same configuration as the upper end portion of the column 12. That is, a hollow tube 40 in which the upper end portion of the column reinforcing bar 24 provided on the column 16 is inserted is embedded in the upper end portion of the column 16.

  A grout injection hole 42 for injecting grout from the lower end of the hollow tube 40 and a grout discharge hole 44 for discharging grout from the upper end of the hollow tube 40 are formed at the upper end of the column 12.

  As shown in FIG. 2B, the column 16 is placed on the upper surface of the column beam joining member 14, and the column rebar 24 protruding from the lower surface of the column 16 is penetrated into the through hole 28 of the column beam joining member 14. Then, the column 12 is inserted into the insertion hole of the hollow tube 40.

  As shown in the enlarged view of FIG. 4, female screws 46 are formed at the four corners of the upper surfaces of the columns 12, 16 and the beam-column joining member 14, and a bolt 48 screwed into the female screw 46 is screwed. The installation height of the horizontal structure 22 (column-beam joining member 14) and the column 16 can be adjusted by the amount of insertion.

  The grout discharge hole 26 is formed by a sheath tube embedded in the column 16, the through hole 28 is formed by a sheath tube embedded in the column beam joining member 14, and the grout supply hole 38 is formed by the column beam joining member 14 and It is formed by a sheath tube embedded in the beam 20. That is, the hollow part of the sheath tube is a grout discharge hole 26, a through hole 28, and a grout supply hole 38. The sheath tube is embedded so as not to protrude from the end face of the member.

  The grout discharge hole 26, the through hole 28, and the grout supply hole 38 may be formed by a method other than embedding the sheath tube. For example, the cylindrical member embedded in the concrete forming the member may be formed by removing after the concrete is hardened, or may be formed by perforation. Moreover, the hollow tubes 32 and 40 should just be what can insert the beam reinforcement 30 and the column reinforcement 24, and can connect the beam reinforcement 30 and column reinforcement 24 reliably.

  Next, a building construction method using the joint structure 10 will be described with reference to the elevation views of FIGS. For convenience of explanation, the column 12, the horizontal structure 22 (column-beam joining member 14, beams 18, 20), the column 16, and the joint structure 10 arranged on the left side of the figure are connected to the column 12 A and the horizontal structure 22 A ( Column-to-column joining member 14A, beams 18A, 20A), column 16A, joining structure 10A, column 12 arranged in the center of the figure, horizontal structure 22 (column-to-beam joining member 14, beams 18, 20), column 16, The joining structure 10 is a column 12B, a horizontal structure 22B (column-beam joining member 14B, beams 18B, 20B), a column 16B, and a joining structure 10B, and the column 12 and the horizontal structure 22 (column beam arranged on the right side of the figure). The joining member 14, the beams 18 and 20), the column 16, and the joining structure 10 are referred to as a column 12C, a horizontal structure 22C (column-beam joining member 14C, beams 18C and 20C), a column 16C, and a joining structure 10C.

  First, as shown in FIG. 5A, columns 12 </ b> A to 12 </ b> C are installed on the foundation slab 50.

  Next, the horizontal structure 22A (column-beam connecting member 14A) is placed on the upper surface of the column 12A so that there is a gap between the upper surface of the column 12A and the lower surface of the column-beam connecting member 14A, and FIG. As shown in the front view of a), the periphery of this gap is sealed with an air tube 52 as a sealing member to form a lower joint space 54 (lower joint forming step). The size of the gap between the upper surface of the column 12A and the lower surface of the column beam joining member 14A is adjusted by the screwing amount of the bolts 48 provided on the upper surface of the column 12A (see FIG. 4).

  Next, as shown in FIG. 5B, the horizontal structure 22B is moved laterally so that the end face of the beam 18B faces the end face of the beam 20A, and the beam 18B is joined to the beam 20A, and the column 12B. The horizontal structure 22B (column-beam connecting member 14B) is placed on the upper surface of the column 12B with a gap between the upper surface of the column and the lower surface of the column-beam connecting member 14B. And a lower joint formation process is performed by the same method as when horizontal structure 22A was mounted on the upper surface of pillar 12A.

  FIG. 3A shows a state immediately before the beam 18 is joined to the beam 20, and FIG. 3B shows a state where the beam 18 is joined to the beam 20. . As shown in FIG. 3B, in a state where the beam 18 is joined to the beam 20, the beam reinforcing bar 30 of the beam 18 is inserted into the hollow tube 32 of the beam 20 and filled into the hollow tube 32. It is fixed by the hardened grout. Further, the beam 18 is arranged with respect to the beam 20 so as to have a small gap 58 between the end face of the beam 20 and the end face of the beam 18, and the grout filled in the gap 58 is hardened to thereby set the beam 18 and the beam. 20 and integration.

  Next, as shown in FIG.5 (c), the horizontal structure 22C (column-beam joining member 14C) is mounted on the upper surface of the column 12C by the method similar to FIG.5 (b), and a lower joint formation process is carried out. Do.

  Next, as shown in FIG. 6 (d) and FIGS. 2 (a) and 2 (b), the column 16A is formed with a gap between the upper surface of the column beam joining member 14A and the lower surface of the column 16A. As shown in FIG. 7A and FIG. 8A, which is a view taken along the line AA in FIG. 7A, is placed on the upper surface of the beam-column joining member 14A. The upper joint space 56 is formed by sealing with an air tube 52 (upper joint formation step). FIG. 2A shows a state immediately before the column 16 is placed on the upper surface of the beam-column joining member 14, and FIG. 2B shows the column 16 placed on the upper surface of the beam-column joining member 14. The state is shown.

When the column 16 is placed on the upper surface of the beam-column joining member 14, the column rebar 24 protruding from the lower surface of the column 16 passes through the through hole 28 of the beam-column joining member 14 and is provided in the column 12. It is inserted into the insertion hole of the tube 40. That is, the column 16 as the upper member is placed on the upper surface of the column beam joining member 14 as the intermediate member, and the column 12 and the column beam joining member 14 are connected via the column reinforcing bar 24 as the reinforcing bar penetrating the through hole 28. The column 16 is connected.
The column reinforcement 24 inserted into the insertion hole of the hollow tube 40 is fixed to the hollow tube 40 by curing the grout filled in the hollow portion of the hollow tube 40 from the grout injection hole 42.

  As shown in FIG. 8A, when the upper joint space 56 is formed by the air tube 52, three pipe materials 60 as an air vent passage are provided in the upper joint space 56. As shown in the enlarged view of FIG. 9, the tube material 60 is inserted into the outer tube 62 fixed by being sandwiched between the air tubes 52 while being in contact with the lower surface of the column 16, and is disposed substantially horizontally.

  The exhaust port 66 of the tube material 60 is positioned outside the air tube 52, and the intake port 68 of the tube material 60 is positioned inside the upper joint space 56. In consideration of the shape of the upper joint space 56 and the arrangement of the through-holes 28, the air inlet 68 of the pipe material 60 collects air when the upper joint space 56 is filled with grout in a grout filling process described later. Locate in the expected location. 8A to 8D, the position of the inlet 64 of the grout discharge hole 26 projected onto the upper surface of the column beam joining member 14 in a plan view is indicated by a dotted circle.

  For example, as shown in the plan view of FIG. 10A, the intake port 68 of the pipe 60 is located at the intersection 70 of a quadrilateral diagonal line with the center of the target through hole 28 as the four corners in plan view. Also good. In other words, the air inlet 68 of the pipe member 60 may be positioned at the center of a quadrilateral having four corners as the center of the target through-hole 28 in plan view. Further, for example, as shown in the plan view of FIG. 10B, the intake port 68 of the pipe member 60 is positioned at a point 72 that is at an equal distance from all the centers of the target through holes 28 in plan view. Also good.

  When setting the position of the intake port 68 of the pipe 60 in this way, as shown in the plan view of FIG. 28 may be targeted.

  Next, by supplying grout to the lower joint space 54, the lower joint space 54, the through hole 28, and the upper joint space 56 are filled with grout, and the air in the upper joint space 56 is exhausted through the pipe 60 (grout). Filling step).

  Here, the grout filling step will be described in detail. First, as shown in the front view of FIG. 7B, the grout W is injected from the grout supply hole 38 into the lower joint space 54. Then, by continuing the injection of the grout W from the grout supply hole 38, the lower joint space 54 is filled with the grout W, and the grout W ascends the through hole 28 as shown in the front view of FIG.

  Further, the grout W that has risen through the through-hole 28 by continuing the injection of the grout W from the grout supply hole 38 is a view taken along the line B-B in FIG. As shown in FIG. 4, the liquid overflows from the upper end opening of the through hole 28 and expands almost uniformly. FIGS. 8B to 8D schematically illustrate an example of the state of the grout W that expands in the upper joint space 56 with the passage of time. FIG. 8B illustrates an initial state, FIG. 8C illustrates an intermediate state, and FIG. 8D illustrates a late state.

  As shown in FIG. 8C, the air Q in the upper joint space 56 is gathered in the vicinity of the intake port 68 of the pipe 60 so as to be driven into the grout W, and as shown in FIG. An air reservoir is formed in the vicinity of the intake port 68. By continuing the injection of the grout W from the grout supply hole 38, the air Q in the air reservoir passes through the pipe member 60 from the exhaust port 66 to the outside of the air tube 52 ( Exhaust outside the upper joint space 56). Thereby, the air pocket formed in the upper joint space 56 can be reduced or eliminated.

  In addition, when the air Q exhausted from the exhaust port 66 of the pipe material 60 disappears and only the grout W is exhausted from the exhaust port 66 of the pipe material 60, the exhaust port 66 of the pipe material 60 is closed to close the grout W. It is preferable to reduce the discharge loss.

  Further, by continuing the injection of the grout W from the grout supply hole 38, the entire joint space 56 is filled with the grout W as shown in the front view of FIG. Since the grout W is discharged, the injection of the grout W from the grout supply hole 38 is stopped after the discharge of the grout W is confirmed.

  Thus, in the grout injection method of the first embodiment, the lower joint space 54, the through hole 28, and the upper joint space 56 are grouted by performing the lower joint formation process, the upper joint formation process, and the grout filling process. W can be filled. Then, by hardening the filled grout W, the pillar 12A, the horizontal structure 22A, and the pillar 16A are integrated, and the joining structure 10A is constructed.

  Next, as shown in FIGS. 6E and 6F, the columns 16B and 16C are placed on the upper surfaces of the column beam joining members 14B and 14C, and the joining structure 10B, Build 10C.

  After that, a building is constructed by repeating the same operations as in FIGS. 5A to 5C and FIGS. 6D to 6F while raising the floor, and stacking the joining structure 10 to the top floor. The configuration of the upper end portions of the columns 16A to 16C in FIG. 6 (f) and the configuration of the upper end portions of the columns 12A to 12C in FIG. 5 (a) are the same as in FIGS. 5 (a) to 5 (c). The following horizontal structures 22A to 22C may be installed on the upper surfaces of the pillars 16A to 16C in FIG. In this case, the pillars 16A to 16C are lower members.

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

  In the grout injection method of the first embodiment, as shown in FIGS. 7A to 7D, the lower joint space 54, the penetration is performed by performing the lower joint formation process, the upper joint formation process, and the grout filling process. The grout W can be filled in the hole 28 and the upper joint space 56.

  Here, when the planar shape of the upper joint space 56 is square and the through holes 28 are evenly arranged along the outer periphery of the upper joint space 56, the grout W is filled into the upper joint space 56. In addition, the grout W supplied to the lower joint space 54 and fed into the upper joint space 56 through the through hole 28 spreads almost uniformly from the through hole 28 and flows toward the center of the plane of the upper joint space 56. As a result, air is collected at the center of the plane of the upper joint space 56. If the grout discharge hole 26 is provided so as to communicate with the center of the plane, air is discharged from the grout discharge hole 26 together with the grout W. No air pocket is formed in the upper joint space 56.

  However, when the planar shape of the upper joint space 56 is a flat shape such as a rectangle, or when the through holes 28 are not evenly arranged along the outer periphery of the upper joint space 56, Even if the grout discharge holes 26 are provided so as to communicate with each other at the center of the plane, it is conceivable that air gathers at a place other than the center of the plane of the upper joint space 56 to form an air pocket.

On the other hand, in the grouting method of the first embodiment, since the pipe material 60 is provided so that the air inlet 68 is located where air gathers, the planar shape of the upper joint space 56 and the arrangement of the through holes 28 Without being greatly affected, the air Q formed in the upper joint space 56 is exhausted from the exhaust port 66 to the outside of the air tube 52 (outside the upper joint space 56) through the pipe member 60. Accumulation can be reduced or eliminated.
As a result, the upper joint space 56 can be filled with the grout W densely, so that the column beam joining member 14 and the column 16 can be reliably joined.

  In addition, by using the pipe member 60 provided in the upper joint space 56 as the air vent passage, the air vent passage can be provided without special processing of the column beam joining member 14 or the column 16.

  Further, since the pipe material 60 is provided in the upper joint space 56 by being inserted into the outer pipe 62 sandwiched between the air tubes 52, the air tube 52 is used to cure the grout W filled in the upper joint space 56. It is possible to remove (pull out) only the tube material 60 without removing it.

  Further, since the pipe member 60 is provided so that the air inlet 68 of the pipe member 60 is located in the center of a quadrilateral with the centers of the through holes 28 as the four corners in plan view, the air in the upper joint space 56 gathers. The intake port 68 can be arranged at an easy position. Thereby, the air pocket formed in the upper joint space 56 can be efficiently reduced or eliminated.

  The first embodiment of the present invention has been described above.

  In addition, although the example which used the pillar 12 as the precast concrete member was shown in 1st Embodiment, the pillar 12 may be formed with a cast-in-place concrete. That is, the lower member of the first embodiment may be a member formed of concrete.

  Moreover, in 1st Embodiment, although the example which installed three pillars 12A-12B in the basic | foundation slab 50 was shown, only the pillar 12 required in order to build one part of a building is installed, and those pillars are installed. 12 (a) to (c) and FIGS. 6 (d) to (f) may be performed.

  Further, in the first embodiment, an example in which three pipe members 60 are provided in the upper joint space 56 has been described. However, the arrangement and number of the pipe members 60 are the same as those when the upper joint space 56 is filled with grout in the grout filling process. Assuming a place where air gathers, it may be determined appropriately based on this. If it is difficult to assume where air gathers, the number of pipes 60 may be increased. In that case, the arrangement and number of the pipe materials 60 are determined in consideration of the loss of the grout W discharged from the pipe material 60.

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

  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.

  In the second embodiment, as shown in the plan view of FIG. 11 and the enlarged view of FIG. 12, a groove 78 as an air vent passage is formed on the lower surface of the column 16. The groove 78 extends from the inside of the upper joint space 56 to the outer peripheral portion. In FIG. 11, the position of the groove 78 projected on the upper surface of the beam-column joining member 14 in plan view is indicated by a dotted-line square.

  The groove 78 is formed so that the exhaust port 130 of the groove 78 is located at the lower surface edge of the column 16. Further, considering the shape of the upper joint space 56, the arrangement of the through holes 28, and the like, the groove 78 is formed at a place where air is assumed to be collected when the upper joint space 56 is filled with grout in the grout filling process. The intake port 132 is formed so as to be positioned.

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

  In the grout injection method of the second embodiment, as shown in FIGS. 11 and 12, the planar shape of the upper joint space 56 and the arrangement of the through holes 28 are greatly affected by the same principle as that of the tube material 60 of the first embodiment. Instead, the air Q in the upper joint space 56 is exhausted from the exhaust port 130 to the outside of the air tube 52 (outside of the upper joint space 56) through the groove 78, thereby forming an air pocket formed in the upper joint space 56. Can be reduced or eliminated.

  In addition, the size of the cross section of the air vent passage can be set without being affected by the size (height) of the gap in the upper joint space 56. Further, when the upper joint space 56 is filled with the grout W, there is no fear that the position of the air vent passage is shifted.

  The first and second embodiments of the present invention have been described above.

  In the first embodiment, an example in which the grout W is supplied from the grout supply hole 38 to the lower joint space 54 has been described. However, the grout W may be supplied to the lower joint space 54 using another method. For example, the grout W may be supplied to the lower joint space 54 by the method shown in the front views of FIGS.

  FIG. 13 shows an example in which the grout W is supplied from the grout supply hole 80 formed in the beam-column joining member 14 so as to penetrate from the side surface to the lower surface of the beam-column joining member 14 to the lower joint space 54.

  In this way, the length of the grout supply hole can be made shorter than that of the grout supply hole 38 shown in FIG. 7A and the pipe resistance can be reduced. It can flow.

  In FIG. 14, a lower joint is formed from a grout supply hole formed by a grout supply pipe 82 provided in the column 16 and the beam-column joining member 14 so as to penetrate from the side surface of the column 16 to the lower surface of the beam-column joining member 14. An example of supplying the grout W to the space 54 is shown.

  In this way, the grout W can be supplied from the injection port 104 at a position higher than the injection port 102 of the grout supply hole 38 shown in FIG. 7A, and the injection pressure of the grout W is increased by gravity. Therefore, a grout pump with a low discharge pressure can be used, or a grout pump becomes unnecessary.

  In FIG. 15, a lower joint is formed from a grout supply hole formed by a grout supply pipe 84 provided in the column 16 and the beam-column joining member 14 so as to penetrate from the upper surface of the column 16 to the lower surface of the beam-column joining member 14. An example of supplying the grout W to the space 54 is shown. The grout supply pipe 84 is a straight pipe.

  In this way, the grout W can be supplied from the inlet 106 positioned higher than the inlet 102 of the grout supply hole 38 shown in FIG. 7A, and the injection pressure of the grout W is increased by gravity. Therefore, a grout pump with a low discharge pressure can be used, or a grout pump becomes unnecessary. Further, since the grout supply pipe 84 is a straight pipe, the pipe resistance can be reduced, and the grout W can be favorably flown into the grout supply hole formed by the grout supply pipe 84.

  FIG. 16 shows an example in which the grout W is supplied from the grout supply hole 86 formed in the column 12 to the lower joint space 54 so as to penetrate from the side surface of the column 12 to the upper surface. In this way, the grout pump can be installed beside the column 12.

  FIG. 17 shows an example in which the grout W is supplied to the lower joint space 54 from the grout injection hole 42 of the hollow tube 40 (see FIGS. 1 and 2B). In this case, the grout discharge hole 44 formed in the hollow tube 40 having the grout injection hole 42 for supplying the grout W to the lower joint space 54 is closed. In this way, the trouble of providing the grout supply hole can be saved. The grout W may be supplied from one hollow tube 40 to the lower joint space 54, or the grout W may be supplied from the plurality of hollow tubes 40 to the lower joint space 54. For example, the grout W may be supplied from all the hollow tubes 40 to the lower joint space 54.

  FIG. 18 shows an example in which the grout W is supplied from the grout supply hole 88 formed in the horizontal structure 22 to the lower joint space 54 so as to penetrate from the upper surface of the beam 20 to the middle portion of one through hole 28. Has been.

  In this way, since the through hole 28 can be used as a part of the grout supply hole, the trouble of providing the grout supply hole can be reduced. In this case, as shown in the plan views of FIGS. 19B and 19C, the sizes of the through holes 96 and 98 (the sheath tubes 92 and 94) used as the grout supply holes are shown in the plan view of FIG. It is preferable to make it larger than the through hole 28 (sheath tube 90) having a general size shown in FIG. In addition, the through hole 28 having a general size means the through hole 28 having an inner diameter close to the outer diameter of the column reinforcing bar 24 to be penetrated. In addition, a through hole 28 that is used only as a grout supply hole, in which the column reinforcing bar 24 is not penetrated, may be formed in the column beam joining member 14.

  In the first embodiment, the column reinforcing bar 24 protruding from the lower surface of the column 16 is inserted into the hollow portion of the hollow tube 40 provided in the column 12, and then the hollow portion of the hollow tube 40 is filled with grout. The example in which the column rebar 24 is fixed to the hollow tube 40 by hardening is shown. However, the grout W is filled in the hollow portion of the hollow tube 40 in advance, and the column rebar 24 is cured before the grout W is cured. May be inserted into the hollow portion of the hollow tube 40.

In the first embodiment, the column rebar 24 provided on the upper member (column 16) and projecting downward is passed through the through hole 28 of the intermediate member (column-beam joining member 14) to form the lower member (column 12). The grout injection method for the so-called “reverse insertion method” in which the lower member, the intermediate member, and the upper member are integrated by connecting to the provided hollow tube 40 has been described. The grout of the first and second embodiments The injection method can be applied to a construction method in which the upper member is placed on the upper surface of the intermediate member and the lower member, the intermediate member, and the upper member are connected via a reinforcing bar that penetrates the through hole of the intermediate member. .
For example, the so-called “forward insertion method” shown in the front view of FIG. 20 and the grouting method of the first and second embodiments can be applied to the method of FIG. The method shown in the front view of FIG. 21 does not fill the upper joint space with the grout by supplying the grout to the lower joint space, but will be introduced as a modification of FIG.

  In FIG. 20, first, the column beam joining member 14 as the intermediate member is placed on the upper surface of the column 108 as the lower member, and the column reinforcing bars 24 provided on the column 108 and projecting upward from the upper surface of the column 108 are arranged. It penetrates through a through hole 28 formed in the beam joining member 14.

  Next, the column 110 as the upper member is placed on the upper surface of the column beam joining member 14, and the upper end of the column rebar 24 provided on the column 108 is embedded in the lower end of the column 110. It inserts in an insertion hole, and fixes the upper end part of the column reinforcement 24 to the hollow tube 40 with grout.

  Next, the lower joint space 54 and the upper joint space 56 are formed by a method similar to that shown in the first embodiment, and the pipe material 60 (not shown) is provided in the upper joint space 56, and then the grout filling step. I do.

  In FIG. 21, first, a column beam joining member 14 as an intermediate member is placed on the upper surface of a column 108 as a lower member, and a column reinforcing bar 24 provided on the column 108 and projecting upward from the upper surface of the column 108 is columned. It penetrates through a through hole 28 formed in the beam joining member 14.

  Next, after the lower joint space 54 is formed by the same method as shown in the first embodiment, the grout W is supplied from the grout supply hole 38 to the lower joint space 54, whereby the lower joint space 54 and the through joint space 54 are formed. The hole 28 is filled with grout W.

  Next, the column 110 as the upper member is placed on the upper surface of the column beam joining member 14, and the upper end of the column rebar 24 provided on the column 108 is embedded in the lower end of the column 110. It inserts in an insertion hole, and fixes the upper end part of the column reinforcement 24 to the hollow tube 40 with grout.

  Next, the upper joint space 56 is formed by the same method as that shown in the first embodiment, and after the pipe material 60 (not shown) is provided in the upper joint space 56, the grout W is formed in the upper joint space 56. Supply. The supply of the grout W to the upper joint space 56 may be performed, for example, from the grout discharge hole 44 of the hollow tube 40 as shown in FIG. In this case, the grout injection hole 42 formed in the hollow tube 40 having the grout discharge hole 44 for supplying the grout W to the upper joint space 56 is closed.

  In FIG. 22, first, the column beam joining member 14 as an intermediate member is placed on the upper surface of the column 134 as a lower member.

  Next, the relay bar 136 is passed through the through hole 28 of the beam-column joining member 14, and the lower end portion of the relay bar 136 is inserted into the insertion hole of the hollow tube 40 embedded in the upper end portion of the column 134. Then, the lower end portion of the relay bar 136 is fixed to the hollow tube 40 by grout.

  Next, the column 110 as the upper member is placed on the upper surface of the beam-column joining member 14, and the upper end portion of the relay bar 136 is inserted into the insertion hole of the hollow tube 40 embedded in the lower end portion of the column 110, The upper end portion of the relay bar 136 is fixed to the hollow tube 40 by the grout.

  Next, the lower joint space 54 and the upper joint space 56 are formed by a method similar to that shown in the first embodiment, and the pipe material 60 (not shown) is provided in the upper joint space 56, and then the grout filling step. I do.

In the first embodiment, the example in which the beam 18 is joined to the beam 20 by the method shown in FIGS. 3A and 3B has been described. However, the beam 18 can be reliably joined to the beam 20. I just need it. For example, the methods shown in FIGS. 23A and 23B and FIGS. 25A and 25B may be used.
23 (a) and 25 (a) show a state immediately before the beam 18 is joined to the beam 20, and FIGS. 23 (b) and 25 (b) show the beam 18 on the beam 20. FIG. The joined state is shown.

  23A and 23B, first, the beam 18 is arranged with the end face of the beam 18 facing the end face of the beam 20 so as to have a small gap or to be in close contact with each other.

  Next, the hollow tube 124 is pulled out from the housing hole 120 formed by the sheath tube 116 embedded in the end portion of the beam 18, and the housing hole 122 formed by the sheath tube 118 embedded in the end portion of the beam 20. Insert into. At this time, the end of the beam rebar 30 provided on the beam 20 is inserted into the hollow tube 124 while the end of the beam rebar 30 provided on the beam 18 is inserted into the hollow tube 124. The beam rebar 30 provided at 18 and the beam rebar 30 provided at the beam 20 are joined. Note that, in the state of FIG. 23A, the beam reinforcing bar 30, the hollow tube 124, and the sheath tubes 116 and 118 do not protrude from the end surfaces of the beams 18 and 20.

  Next, the gap 126 formed between the end face of the beam 18 and the end face of the beam 20, the accommodation holes 120 and 122, and the hollow portion of the hollow tube 124 are filled with grout and cured, and the beam 20 and the beam 18 are then cured. And unite.

  As described above, in the joining method of FIGS. 23A and 23B, the end face of the beam 18 is opposed to the end face of the beam 20 so as to have a small gap or in close contact with each other. Eliminates complicated work such as post-working concrete on the joint with the beam 20 (the space between the end face of the beam 18 and the end face of the beam 20) and work for installing a formwork for post-casting concrete. Therefore, the workability can be improved.

  Further, in this joining method, the beam 18 can be joined to the beam 20 by moving the beam 18 (horizontal structure 22) in the lateral direction, and by moving the beam 18 (horizontal structure 22) in the vertical direction. Also, the beam 18 can be joined to the beam 20.

  Here, for example, as shown in the plan view of FIG. 24, the horizontal structures 22 and 128 are installed counterclockwise from the point K (in the order of the arrows 112), and clockwise from the point K (in the order of the arrows 114). ) To construct the building by performing the work of installing the horizontal structures 22 and 128 in parallel, the horizontal structure 22 (the horizontal structure 22 indicated by the dotted line in FIG. 24) to be installed last is used. The horizontal structures 22 and 128 other than this can be installed by moving in the vertical direction, and other horizontal structures 22 and 128 can be installed by moving in the horizontal direction.

  Even in the situation other than the situation of FIG. 24, the horizontal structure is moved in the lateral direction depending on the situation where the horizontal structure must be installed between the already installed beams, the situation where the movement range of the boom of the crane is restricted, or the like. Useful when you can't.

  25 (a) and 25 (b), the ends of the beam rebar 30 provided protruding from the end surfaces of the beams 18 and 20 are connected by a hollow tube 124, and the beam 18 and the beam 20 are bonded. The concrete V is post-placed and cured in the portion (the space between the end face of the beam 18 and the end face of the beam 20), and the beam 18 and the beam 20 are integrated.

  In the first and second embodiments, an example in which the lower member and the upper member are columns and the intermediate member is a beam-to-column connection member has been described. However, the present invention is not limited to this. The intermediate member may be a beam or a floor slab. That is, the first and second embodiments are applied to a joint structure in which a beam is disposed between the lower wall and the upper wall, and a joint structure in which a floor slab is disposed between the lower wall and the upper wall. can do.

  In the first and second embodiments, the example in which the planar shape of the upper surface of the beam-column joining member 14 is rectangular has been shown. However, the planar shape of the upper surface of the beam-column joining member 14 is triangular, square, rectangular, Various shapes such as a trapezoid, a polygon, a circle, and an ellipse can be used, and this is particularly effective for a flat shape such as a rectangle, an ellipse, and a trapezoid.

  Further, in the first embodiment, the example in which the outlet 100 (lower end) of the grout supply hole 38 is arranged at the substantially center of the lower surface of the column beam joint member 14 is shown. You may arrange | position in any position of a lower surface. In the first and second embodiments, an air pool formed in the upper joint space 56 by the pipe material 60 and the groove 78 can be reduced, so that the grout W filled in the upper joint space 56 by the arrangement of the outlet port 100 can be reduced. Even if there is a difference in the filling method, it will not be greatly affected.

  Further, in the first and second embodiments, the example in which the sealing member is the air tube 52 has been described. However, any member can be used as long as the lower joint space 54 and the upper joint space 56 can be formed by sealing the periphery of the gap. For example, solid mortar may be packed in the gap and sealed.

  Moreover, in 1st Embodiment, although the example which positions the inlet port 68 of the pipe material 60 in the center of the quadrangle which makes the four corners the center of the object through-hole 28 was shown, When the timing at which the grout W starts to overflow from the upper end opening is different for each through hole 28, it is preferable to arrange the intake port 68 of the pipe material 60 near the through hole 28 from which the grout W overflows the latest. This arrangement may be appropriately determined in consideration of the timing difference of each through hole 28 where the grout W starts to overflow from the upper end opening.

  In the first embodiment, the air vent passage is the pipe material 60, and in the second embodiment, the air vent passage is the groove 78. However, the air in the upper joint space 56 is outside the seal member (upper joint). Any material that can be exhausted to the outside of the space 56 may be used.

  In the first and second embodiments, the reinforcing bars other than the column reinforcing bars 24 and the beam reinforcing bars 30 are omitted for convenience of explanation. However, the columns 12 and 16 and the horizontal structure 22 have shear reinforcing bars. Or reinforcing bars such as two-stage reinforcing bars may be provided as needed.

  As mentioned above, although 1st and 2nd embodiment of this invention was described, this invention is not limited to such embodiment at all, You may use combining 1st and 2nd embodiment, Needless to say, the present invention can be implemented in various modes without departing from the gist of the present invention.

10 Joining structure 12, 108, 134 Column (lower member)
14 Beam-column joint members (intermediate members)
16, 110 Column (upper member)
24 Column reinforcement (rebar)
28 Through hole 52 Air tube (seal member)
54 Lower joint space 56 Upper joint space 60 Pipe (air vent passage)
62 Outer pipe 66, 130 Exhaust port 68, 132 Inlet port 70 Intersection (center)
78 groove (air vent passage)
136 Relay bar (rebar)
Q Air W Grout

Claims (9)

A lower joint formation step in which a precast concrete intermediate member in which a through hole is formed is placed on the upper surface of a concrete lower member with a gap, and the periphery of the gap is sealed with a seal member to form a lower joint space. When,
The upper member made of precast concrete is placed on the upper surface of the intermediate member with a gap, and the lower member, the intermediate member, and the upper member are connected to each other through a reinforcing bar that penetrates the through hole. An upper joint formation step of forming an upper joint space by sealing the periphery of
By supplying the grout to the lower joint space, the lower joint space, the through hole, and the upper joint space are filled with the grout, and the interior of the upper joint space is provided through an air vent passage provided in the upper joint space. A grout filling step for exhausting the air to the outside of the sealing member;
A grout injection method comprising:   The upper member is placed on the upper surface of the intermediate member, and the reinforcing bar provided on the upper member and projecting from the lower surface of the upper member is passed through the through hole to the insertion hole formed in the lower member. The grouting method according to claim 1, wherein the grouting method is inserted.   The grout injection method according to claim 1 or 2, wherein the air vent passage is a pipe member provided in the upper joint space and having an exhaust port located outside the seal member.   The grout injection method according to claim 3, wherein the tube material is inserted into an outer tube sandwiched between the seal members.   The grout injection method according to claim 1 or 2, wherein the air vent passage is a groove formed on a lower surface of the upper member and extending from the inside of the upper joint space to the outer peripheral portion.   The grout injection method according to any one of claims 1 to 5, wherein an intake port of the air vent passage is located in a center of a quadrilateral having four corners as the center of the through hole in plan view.   The grouting method according to any one of claims 1 to 6, wherein the lower member and the upper member are columns, and the intermediate member is a column beam joining member in which beams are integrally provided.   The joining structure which has the said lower member, the said intermediate member, and the said upper member integrated by the grout injection | pouring method of any one of Claims 1-7.   A building having the joint structure according to claim 8.

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