JP6502599B2 - Method for constructing grout filled concrete member and grout filling method for concrete member - Google Patents

Description

  The present invention relates to a method of constructing a concrete member in which a plurality of holes provided by a sleeve joint or a sheath tube are filled with grout, and to a method of grouting a concrete member provided with a plurality of holes by a sleeve joint or a sheath tube. The present invention relates to technology for realizing easy and accurate grout filling and grout filling work.

  In recent years, in constructing reinforced concrete (hereinafter referred to as RC) building, a construction method using a precast concrete (hereinafter referred to as PC) member has been developed in order to shorten the construction period. In this construction method, when the PC members are joined together, grout is filled and joined to the holes in a state in which the reinforcing bars of both members are inserted into the holes of a plurality of sleeve joints, sheath tubes, etc. There is a case where grout is filled in the through hole and integrated with the other PC member in a state where the reinforcing bar extending from the through hole is inserted through the plurality of through holes formed in the other PC member (Patent Document 1) reference).

  As a concrete member provided with such a sleeve joint or sheath tube, a sleeve joint or sheath in which a pouring and discharging passage communicating with the grout pouring and discharging port of the sleeve joint or sheath tube and having an opening in the surface of the concrete member is arranged. A plurality of tubes corresponding to each row of tubes are formed to be in communication with each other, and each injection and discharge passage is provided to communicate with a plurality of sleeve joints or sheath tubes of the corresponding row at its side portion. The invention has become known. According to this concrete member, one opening that opens to the surface of the concrete member is used as a grout inlet, the other one is used as an air outlet, and grout is injected with the remaining openings closed. It is assumed that all sleeve joints or sheath tubes can be filled with grout.

JP 2004-278257 A Patent No. 4982222

  However, in the grout filling method for a concrete member described in Patent Document 2, different injection pressures at each grout inlet / outlet are obtained because the distance from the common inlet to the grout inlet / outlet of each sleeve joint or sheath tube is different. Even if the bore of the short sleeve joint or sheath tube is filled with grout, the bore of the long sleeve joint or sheath tube may not be filled with grout.

  Here, it is also conceivable to continue grout injection until the hole of the sleeve joint or sheath tube at a distant distance is filled with grout, but in such a case, a large amount of it is obtained from the sleeve joint or sheath tube at a short distance. Grout overflows and leaks from the joint between concrete members, or grout flows into the hole of the unfilled sleeve joint or sheath tube from the joint side, and filling check of grout (confirmation that grout overflows the joint) There is a high possibility that the air can not be removed or the air inside the hole can not be removed due to the inflowing grout.

  In view of such a background, the present invention has an object to provide a method of constructing a concrete member filled with grout and a method of grouting the concrete member, wherein the grout can be easily and properly filled in all the holes. I assume.

  In order to solve the above-mentioned subject, the present invention is a construction method of a concrete member (1, 31) filled with grout, and it is opened in a joint surface (1a, 31a) with other members (2), and A plurality of holes (5a, 32) having grout inlets (5b, 32b) are provided, and from the outer surface (1b, 1e, 31e) different from the coupling surface to the plurality of grout inlets via a plurality of branch parts Providing concrete members (1, 31) provided with a grout injection passage (7) to reach (FIG. 5A), inserting reinforcing bars (4) of the other members into the holes (FIG. 5A), and supplying Preparing a nozzle tube (12, 22) having a nozzle (12a, 22a) for discharging the grout, and inserting the nozzle tube into the grout injection passage from the outer surface side (FIG. 5A) A flop (Fig. 5B), a configuration and a step (FIG 5C~ Figure 6E) for ejecting grout into the grouting passages the nozzle from the nozzle in a state of being disposed at a position corresponding to each branch unit.

  Moreover, in order to solve the said subject, this invention opens the hole (5a, 32) which opens in a joint surface (1a, 31a) with another member (2), and has a grout injection port (5b, 32b) Concrete members (1, 31) provided with a plurality of grout injection passages (7) extending from the outer surface (1b, 1e, 31e) different from the coupling surface to the plurality of grout inlets via the plurality of branches G) a method of preparing a nozzle tube (12, 22) having a nozzle (12a, 22a) for discharging the supplied grout (FIG. 5A); The step of inserting from the outer surface side (FIG. 5B), and discharging the grout from the nozzle to the grout injection passage in a state where the nozzle is disposed at a position corresponding to each branch portion Configured to include a step (FIG 5C~ Figure 6E).

  According to these configurations, by discharging the grout in a state in which the nozzles are disposed at the positions corresponding to the respective branch portions, an appropriate injection pressure is applied to all the grout inlets to grout all the holes. It can be filled properly.

  As described above, according to the present invention, it is possible to provide a method for constructing a grout-filled concrete member and a method for grout-filling a concrete member, in which all holes can be filled with grout easily and properly.

Front view of a reinforced concrete member according to the first embodiment II-II sectional view in FIG. 1 III-III sectional view in FIG. 2 IV-IV sectional view in FIG. 2 Explanatory drawing of the grout injection procedure to the lower side column member shown in FIG. 1 Explanatory drawing of the grout injection procedure to the lower side column member shown in FIG. 1 Explanatory drawing of the grout injection procedure to the lower side pillar member which concerns on 2nd Embodiment Explanatory drawing of the grout injection procedure to the lower side pillar member which concerns on 2nd Embodiment Cross-sectional view of the lower side column member according to the third embodiment Partially enlarged view of the nozzle tube used in the third embodiment Side view of a reinforced concrete member according to the fourth embodiment

  Hereinafter, with reference to the drawings, a method of constructing a concrete member filled with grout according to the present invention and a method of injecting grout to a concrete member will be described in detail by citing some embodiments.

First Embodiment
First, a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, in the present embodiment, when the lower column member 1 and the upper column member 2 made of precast concrete are connected to each other, the column main bars of the lower column member 1 (hereinafter referred to as lower column main bars 3) The present invention is applied to join the main bars of the upper column member 2 (hereinafter referred to as the upper main bars 4) with each other.

  The lower column members 1 are attached to the upper ends of the plurality of lower column members 1 extending in the vertical direction and the lower column members 1 so that the upper end is exposed on the upper surface 1 a of the lower column member 1 And a plurality of sleeve joints 5 embedded in concrete. On the other hand, the upper column member 2 extends in the vertical direction, and includes a plurality of upper column main bars 4 projecting downward from the lower surface of the concrete.

  The upper column members 2 are inserted into the holes 5 a of the corresponding sleeve joints 5 with the respective upper column main bars 4 and arranged at predetermined positions to secure joints 6 of a predetermined width w with the lower column members 1. In this state, the upper column main reinforcement 4 is joined to the lower column main reinforcement 3 by hardening the grout with which the sleeve joint 5 is filled. After the upper column main reinforcement 4 is joined to the lower column main reinforcement 3, grout is injected into the joint 6, and the upper column member 2 is connected to the lower column member 1 by hardening the grout. Although non-shrink mortar is used as the grout in the present embodiment, the present invention is not limited to this.

  Next, with reference to FIGS. 2 to 4, the configuration of each member and the relationship between each element in a state where the upper column member 2 is disposed at a predetermined position will be described.

  As shown in FIG. 2, the lower column member 1 has a rectangular cross section, and five each along the side surfaces (1 b to 1 e) including the lower column main reinforcement 3 disposed at the corner, for a total of 16 It has the lower column main bar 3 of the book. The lower column main bars 3 are arranged at substantially equal intervals. The outline of the upper column member 2 also has the same cross-sectional shape as the lower column member 1, and sixteen upper column main bars 4 are arranged at the same position as the lower column main bars 3. Bands not shown are arranged on the outer periphery of the lower column main reinforcement 3 and the upper column main reinforcement 4. Although the lower column main bars 3 and the upper column main bars 4 are shown as round steels in the drawings in a simplified manner, they are profiled steel bars.

  As shown in FIG. 3 together, the sleeve joint 5 attached to the upper end of each lower column member 1 is a well-known metal product having a substantially cylindrical shape, and has holes 5a opened at both ends in the axial direction. It is composed. In the vicinity of the lower end of the sleeve joint 5, a grout inlet 5b communicating with the hole 5a is formed. Near the axial center on the inner surface of the sleeve joint 5, a stopper 5 c is formed to project and limit the upper end position of the lower main rib 3. The sleeve joint 5 is also shown simplified in the drawing.

  The lower column main reinforcement 3 is inserted from the lower side to the hole 5a of the sleeve joint 5 until the upper end abuts against the stopper 5c, and closes the lower opening of the hole 5a. That is, in the state where the sleeve joint 5 is attached to the upper end portion of the lower column main bar 3 and embedded in concrete, a recess with a bottom is formed on the upper surface 1 a of the lower side column member 1 by the hole 5a. It projects from the bottom of the recess into the hole 5a and exposes the upper end portion in the hole 5a.

  On the other hand, the upper column main reinforcement 4 is inserted from the upper side with respect to the hole 5 a of the sleeve joint 5, and arranged near the axial center of the sleeve joint 5 such that the lower end faces the upper end of the lower column main reinforcement 3. In the hole 5 a of the sleeve joint 5, a space to be filled with grout is formed so as to surround the lower column main reinforcement 3 and the upper column main reinforcement 4.

  As shown in FIG. 2, four side surfaces of the lower side pillar member 1 are hereinafter referred to as a front surface 1 b, a back surface 1 c, a right side surface 1 d and a left side surface 1 e. The five sleeve joints 5 disposed along the front face 1b are disposed with the grout inlet 5b facing the back face 1c, and the five sleeve joints 5 disposed along the back face 1c are the grout inlet 5b. Is directed to the front side 1 b side. On the other hand, among the five sleeve joints 5 arranged along the right side surface 1d of the lower column member 1, the three sleeve joints 5 except for the two arranged at the corner portion are the left side of the grout inlet 5b. Among the five sleeve joints 5 arranged toward the surface 1e side and arranged along the left side surface 1e, the three sleeve joints 5 except for the two arranged at the corner portion have the grout inlet 5b. It is arrange | positioned toward the right side 1d side.

  Then, in the lower column member 1, the first grout injection passage 7a connected to the grout inlets 5b of the five sleeve joints 5 disposed along the front surface 1b is provided along the front surface 1b only on the left side surface 1e. The second grout injection passage 7b formed to open and connected to the grout inlet 5b of the five sleeve joints 5 disposed along the back surface 1c is opened along the back surface 1c only to the left side surface 1e Is formed. Further, in the lower column member 1, a third grout injection passage 7c connected to the grout inlets 5b of the three sleeve couplings 5 arranged near the center on the right side 1d is a front side along the right side 1d. A fourth grout injection passage 7d formed to open only in 1b and connected to the grout inlets 5b of the three center-centered sleeve joints 5 disposed along the left side 1e is a front along the left side 1e It is formed to open only in 1b.

  As shown in FIG. 3 and FIG. 4 together, the first and second grout injection passages 7a, 7b are formed in a straight line so as to be horizontal at the same height as the grout injection port 5b. Therefore, in the first and second grout injection passages 7a and 7b, the opening in the left side surface 1e is the only outer end, and the grout inlet 5b itself of the sleeve joint 5 is a branched portion. On the other hand, the third and fourth grout injection passages 7c, 7d are respectively formed in one straight main body passage 8 horizontally formed at a position lower than the grout inlet 5b and at positions corresponding to the respective sleeve joints 5 After branching from the main body passage 8 and extending upward, it is curved and is constituted by a plurality of branch passages 9 leading to the grout inlet 5b. Therefore, in the third and fourth grout injection passages 7c and 7d, the opening of the main body passage 8 in the front face 1b is the only outer end, and the connection portion between the main body passage 8 and each branch 9 is a branch. There is.

  The first to fourth grout injection passages 7a to 7d (hereinafter sometimes referred to simply as "grout injection passage 7") may be formed as a cavity, and there is no limitation on a specific cavity forming means and a cavity forming method. . For example, the grout injection passage 7 may be formed of a pipe member such as a polyvinyl chloride pipe disposed in the form before the concrete is placed on the lower column member 1. Alternatively, as described in Japanese Patent No. 4966063, a tube body that expands and contracts due to the supply and discharge of fluid is placed in the mold in an expanded state, and after hardening of the concrete, the tube body is contracted and withdrawn. A grout injection passage 7 may be formed.

  The lower column member 1 having a rectangular cross section configured in this manner is provided with a plurality of holes 5a having a grout inlet 5b and opened on the upper surface 1a to be a coupling surface with the upper column member 2 A plurality of grout injection passages 7 are provided which extend from the front surface 1b or the left side surface 1e, which is an outer surface different from the surface, to the plurality of grout inlets 5b via the plurality of branch portions.

  Next, a grout filling procedure for the lower column member 1 (hole 5a of the sleeve joint 5) thus manufactured (prepared) in the precast concrete plant will be described with reference to FIGS. Here, the second grout injection passage 7 b is illustrated and described simply as the grout injection passage 7. Similarly, grout is injected to the first, third and fourth grout injection passages 7a, 7c and 7d in the same manner.

  First, as shown in FIG. 5 (A), grout having a diameter longer than the grout injection passage 7 and smaller than the diameter of the grout injection passage 7 is supplied from the grout pump (not shown) through the hose 11. A nozzle pipe 12 having a nozzle 12a for discharging at its tip is prepared. The nozzle tube 12 may be flexible as long as it has appropriate strength. In the present embodiment, the nozzle pipe 12 is made of a metal pipe, and the nozzle 12a is simply the tip of this pipe. Therefore, the grout to be supplied is discharged from the tip of the nozzle pipe 12 in the tip direction. The operator holds the curved grip 13 or the nozzle pipe 12 provided at the proximal end of the nozzle pipe 12 and performs grout injection while operating the switch of the grout pump. In addition, prior to the grout injection work, in order to prevent the grout leakage from the grout injection passage 7, for example, a backup material 14 such as urethane foam provided with a cut is attached to the left side 1e of the lower column member 1.

  When performing grout injection, the operator first inserts the nozzle pipe 12 from the outer end of the grout injection passage 7 into the grout injection passage 7 while passing the backup material 14 as shown in (B). In the present embodiment, the nozzle tube 12 is inserted into the grout injection passage 7 to a position where the nozzle 12a is disposed slightly before the branched portion (that is, the grout inlet 5b) to the deepest (right end) sleeve joint 5 Do.

  In this state, as shown in (C), the grout pump is operated to start grout injection into the grout injection passage 7. The grout discharged from the nozzle 12a into the grout injection passage 7 is filled from the bottom side into the holes 5a of the sleeve joints 5 through the grout injection passage 7 and the grout inlet 5b. At this time, the flow path resistance from the nozzle 12 a to each grout inlet 5 b is the smallest at the innermost sleeve joint 5 and the largest at the innermost sleeve joint 5. Therefore, more grout is filled in the hole 5 a of the sleeve joint 5 toward the back side.

  When a worker or a co-worker observes the joint 6 between the lower side pillar member 1 and the upper side pillar member 2 and confirms that the grout overflows from the upper end of the innermost sleeve joint 5, Then, as shown in FIG. 6 (D), the nozzle pipe 12 is pulled to continue the grout injection operation. When the nozzle tube 12 is retracted, the grout supply from the grout pump may be temporarily stopped or may be continued. In (D) of the present embodiment, the nozzle pipe 12 is retracted to a position where the nozzle 12a is disposed slightly before the grout inlet 5b to the second sleeve joint 5 from the back. When grout is discharged into the grout injection passage 7 in this state, a large amount of grout is filled in the hole 5a of the second sleeve joint 5 from the back.

  The operator observes the joint 6 between the lower side pillar member 1 and the upper side pillar member 2 in the same manner as in the deepest sleeve joint 5 and grouts from the upper end of the second sleeve joint 5 from the far side When it is confirmed that it has overflowed, the operation of retracting the nozzle pipe 12 and injecting grout as described in (D) is repeated, and as shown in (E), from the upper end of the foremost sleeve joint 5 Repeat grout injection until the grout overflows.

  After the holes 5a of all the sleeve joints 5 are filled with grout, as shown in (F), the nozzle pipe 12 is pulled out from the grout injection passage 7 and the backup material 14 is removed and the rubber at the outer end of the grout injection passage 7 The plug 15 is inserted to close the grout injection passage 7 to prevent grout leakage.

  By similarly performing the above procedure on the first, third and fourth grout injection passages 7a, 7c and 7d, the holes 5a of all the sleeve joints 5 and all the grout injection passages 7 are filled with grout. The lower column member 1 is constructed (manufactured). Thereafter, although not shown, a mold is placed around the joint 6 and the grout is poured into the joint 6 and hardened, whereby the lower column member 1 and the upper column member 2 are joined.

  As described above, when the lower column member 1 is filled with grout, the nozzle pipe 12 having the nozzle 12a for discharging the supplied grout is prepared, and the nozzle pipe 12 is placed on the left side 1e side in the grout injection passage 7. By injecting grout into the grout injection passage 7 in a state where the nozzle 12a is disposed at a position corresponding to each grout injection port 5b, an appropriate injection pressure is applied to all the grout injection ports 5b. The grout can be properly filled in all the holes 5a.

  Then, since the grout inlet 5b is provided in the vicinity of the bottom of the hole 5a, grout is injected from the vicinity of the bottom into the hole 5a to push up the air, and the air is prevented from remaining in each hole 5a. .

  Further, as shown in FIG. 2, a plurality of grout injection passages 7 are provided in the lower column member 1, and the lower column member 1 has a square cross section, and two side surfaces of the square cross section (front 1 b, left side 1e) Since the outer end of the grout injection passage 7 is provided only in the 1e), grout injection can be performed only in front of the two side surfaces of the lower column member 1 to fill the grout in all the holes 5a. It is easy to secure. Moreover, the surface finishing of the side of the lower side pillar member 1 performed after grout injection | pouring operation | work also needs only two sides. Therefore, for the back surface 1c and the right side surface 1d where the outer end of the grout injection passage 7 is not provided, surface finishing such as tiling can be performed before the grout injection operation.

Second Embodiment
Next, a grout filling procedure for the lower column member 1 according to the first embodiment of the present invention will be described with reference to FIGS. 7 and 8. In addition, since the structure of each member or element is the same as 1st Embodiment, the same code | symbol is attached to these and the description is abbreviate | omitted.

  As shown in FIG. 7A, the procedure for preparing the nozzle pipe 12 is the same as that of the first embodiment, and in the present embodiment, the specific filling of the grout for the lower column member 1 shown in (B) and thereafter is performed. The procedure is different from that of the first embodiment.

  When performing grout injection, the operator first inserts the nozzle pipe 12 from the outer end of the grout injection passage 7 into the grout injection passage 7 while passing the backup material 14 as shown in (B). In the present embodiment, the nozzle tube 12 is inserted into the grout injection passage 7 to a position where the nozzle 12a is disposed slightly before the branched portion (i.e., the grout inlet 5b) to the sleeve joint 5 closest to the front end (left end). Do.

  In this state, as shown in (C), the grout pump is operated to start grout injection into the grout injection passage 7. The grout discharged from the nozzle 12a into the grout injection passage 7 is filled from the bottom side into the holes 5a of the sleeve joints 5 through the grout injection passage 7 and the grout inlet 5b. At this time, the flow path resistance from the nozzle 12a to each grout inlet 5b is the smallest at the sleeve joint 5 on the nearest side and the largest at the sleeve joint 5 on the innermost side. Therefore, more grout is filled in the hole 5 a of the sleeve joint 5 toward the front side.

  When the worker or the co-worker confirms that the grout has overflowed from the upper end of the foremost sleeve joint 5, next, as shown in FIG. 8 (D), the nozzle pipe 12 is pushed to perform grout injection work Continue. When advancing the nozzle pipe 12, the grout supply from the grout pump may be temporarily stopped or may be continued. In the present embodiment, the nozzle tube 12 is advanced to a position where the nozzle 12a is disposed slightly before the grout inlet 5b to the second sleeve joint 5 from the front. When grout is discharged into the grout injection passage 7 in this state, a large amount of grout is filled in the hole 5a of the second sleeve joint 5 from the front.

  The operator confirms that the grout has spilled out from the upper end of the second sleeve joint 5 from the front as in the case of the sleeve joint 5 on the foremost side, as described in (D). And advance the grout injection operation, and continue the grout injection operation until the grout overflows from the upper end of the innermost sleeve joint 5 as shown in (E).

  After grout is filled in the holes 5a of all the sleeve joints 5, as shown in (F), the nozzle pipe 12 is pulled out from the grout injection passage 7, and the rubber plug 15 is inserted into the outer end of the grout injection passage 7. When the nozzle tube 12 is pulled out, grout is required in the grout injection passage 7 by the volume integral of the nozzle tube 12 and therefore, it is preferable to carry out grout discharge.

  By similarly performing the above procedure on the first, third and fourth grout injection passages 7a, 7c and 7d, the holes 5a of all the sleeve joints 5 and all the grout injection passages 7 are filled with grout. The lower column member 1 is constructed (manufactured).

  Even if the lower column member 1 is filled with grout in such a procedure, the same effect as that of the first embodiment can be obtained.

Third Embodiment
Next, with reference to FIGS. 9 and 10, a third embodiment of the present invention will be described. The present embodiment is different from the first and second embodiments in the configuration of the concrete member filled with grout, and therefore, the nozzle tube 22 having a different configuration is additionally used. In the following, differences from the first and second embodiments will be described.

  As shown in FIG. 9, in the lower column member 1 of the present embodiment, five sleeve joints 5 (hereinafter, referred to as a first row) disposed along the front surface 1b, adjacent to this and on the back surface 1c side The two sleeve joints 5 (hereinafter, referred to as second row) disposed in the two, and the two sleeve joints 5 (hereinafter, referred to as third row) disposed on the back surface 1c side adjacent thereto are: The grout inlet 5b is disposed to face the back surface 1c. On the other hand, two sleeve joints 5 (hereinafter, referred to as fourth line) disposed on the back surface 1c side adjacent to the third row of sleeve joints 5 and five sleeve joints disposed along the back surface 1c 5 (hereinafter referred to as the fifth row) is disposed with the grout inlet 5b facing the front surface 1b.

  Then, in the lower column member 1, a first grout injection passage 7a connected to the grout inlet 5b of the five sleeve joints 5 in the first row, and a grout inlet of the two sleeve joints 5 in the second row The second grout injection passage 7b connected to 5b, the third grout injection passage 7c connected to the grout injection ports 5b of the four sleeve joints 5 in the third and fourth rows, and the five sleeve joints in the fifth row A fourth grout injection passage 7d connected to the fifth grout inlet 5b is formed so as to open only in the left side surface 1e in parallel with the front surface 1b.

  The first to fourth grout injection passages 7a to 7d are all formed in a straight line so as to be horizontal at the same height as the grout injection port 5b, and the third grout injection passage 7c is on the front side 1b side The bifurcated branch and the bifurcated branch (i.e., the grout inlet 5b) branched to the back surface 1c side are formed at the same position in the axial direction.

  When grout is injected into the lower column member 1 configured in this way, the first, second and fourth grout injection passages 7a, 7b, 7d are the same as in the first or second embodiment. The procedure of should be applied. On the other hand, with regard to the third grout injection passage 7c, when grout is injected using the nozzle pipe 12 used in the first and second embodiments, the difference in the passage diameter or the branched passage 9 if there is a branch passage 9 There is a possibility that a difference in grout filling speed may occur between the sleeve joint 5 on the front surface 1b and the sleeve joint 5 on the rear surface 1c due to the difference in the distance to the inlet 5b.

  Therefore, in such a case, as shown in FIG. 10, a nozzle tube 22 having a nozzle hole formed on the outer peripheral surface of the pipe is used so that the nozzle 22a discharges grout not to the tip direction but to the side. It is good to pour grout. Specifically, the nozzle tube 22 is rotated, and the nozzle 22a is directed to the sleeve joint 5 on which more grout is to be injected, that is, the nozzle in the direction (position) corresponding to the branched portion on which more grout is to be injected. Dispense grout with 22a placed. As a result, it is possible to apply an appropriate injection pressure to all the grout inlets 5b to precisely fill the grout in all the holes 5a.

Fourth Embodiment
Finally, a fourth embodiment of the present invention will be described with reference to FIG. As shown in the figure, in the present embodiment, a connection member 31 made of precast concrete is disposed between the lower side pillar member 1 and the upper side pillar member 2 made of precast concrete, and the connection member 31 and the upper side pillar member 2 The present invention is applied to fix the upper main bars 4 of the upper column member 2 to the connection member 31 when connecting the two.

  The upper column main reinforcement 4 of the upper column member 2 protrudes downward from the lower surface longer than the above embodiment. In the connection member 31, no column main bars are provided, and instead, a plurality of through holes 32 for inserting the upper column main bars 4 are formed corresponding to the number and positions of the upper column main bars 4. Further, in the connection member 31, a grout injection passage 7 connected to the plurality of through holes 32 with the grout injection port 32 b is formed so as to open only to the left side surface 31 e of the connection member 31.

  The through hole 32 may be formed as a cavity, and does not matter as a specific cavity forming means and a method of forming the cavity. The through hole 32 may be formed, for example, by a pipe member 35 (sheath pipe) such as a polyvinyl chloride pipe disposed in the mold before placing concrete of the connection member 31 in the same manner as the grout injection passage 7. It may be formed by placing the body in an expanded state in a mold and shrinking and extracting the tube after hardening of the concrete.

  That is, in the precast concrete plant, the connection member 31 configured in this way is opened in the upper surface 31a to be a connection surface with the upper column member 2 and a plurality of through holes 32 having the grout inlet 32b are provided. It is manufactured (prepared) so that a plurality of grout injection passages 7 extending from the left side 1e, which is an outer surface different from the coupling surface, to the plurality of grout injection ports 32b via the plurality of branch portions.

  Hereinafter, the joining procedure of these three concrete members is demonstrated. First, the connection member 31 is disposed so that the joint 6 having a predetermined width w is formed above the lower column member 1, and the upper column member 2 is lowered from above the connection member 31 in that state, and the upper column The main reinforcement 4 is inserted into the through hole 32 of the connection member 31 and is inserted into the hole 5 a of the sleeve joint 5 embedded in the lower column member 1. At this time, the joint 6 having a predetermined width w is also formed between the connection member 31 and the upper column member 2.

  Next, grout is injected into the sleeve joint 5 of the lower column member 1 to join the lower column main reinforcement 3 and the upper column main reinforcement 4. The grout injection method may be performed by the same method as the above embodiment, or may be performed by another method. Next, a formwork (not shown) is installed around the joint 6 between the lower column member 1 and the connection member 31, and grout (joint material 36) is injected into the joint 6 to join the both members. Do. At this time, the grout intrudes into the through holes 32 of the connection member 31, but the injection amount is controlled so that the grout does not reach the grout injection passage 7 formed in the connection member 31. Thereafter, grout is injected into the through holes 32 of the connection member 31 and hardened in the same procedure as the grout injection method shown in the above embodiment, and the upper column main bars 4 are fixed to the connection member 31. After that, a mold (not shown) is placed around the joint 6 between the connection member 31 and the upper column member 2 and grout is injected into the joint 6 and hardened to form the connection member 31 and the upper side. The column member 2 is coupled.

  Thus, even when grout is filled in the connection member 31 provided with a plurality of through holes 32 having the grout inlet 32b, the opening is made on the upper surface 31a that is the coupling surface with the upper column member 2; The gout injection passage 7 is provided in the connection member 31 from the left side surface 31 e different from the coupling surface to the plurality of grout injection ports 32 b via the plurality of branch portions. Then, after inserting the upper column main reinforcement 4 into the through hole 32, the nozzle pipe 12 is inserted into the grout injection passage 7, and the nozzle 12a is arranged at the position corresponding to each grout injection port 32b. By injecting a suitable amount of grout into all the through holes 32, it is possible to apply an appropriate injection pressure to all the grout inlets 5b.

  Although the description of the specific embodiment is finished above, the present invention is not limited to the above embodiment. For example, in the above embodiment, the lower column member 1 is made of precast concrete, but may be constructed of cast-in-place concrete. Moreover, in the said embodiment, although the grout injection channel | path 7 is formed horizontally, you may provide an upward slope in the main body channel | path 8. FIG. With such a configuration, the grout is injected so as to push up the air in the main body passage 8, so that the air can be prevented from remaining in the main body passage 8. In the fifth embodiment, the through hole 32 is formed in the connection member 31. However, the through hole 32 may be formed in an intermediate column member or the like. Furthermore, the holes 5a filled with grout and the through holes 32 are not limited to the upper column main reinforcement 4 integrated with the upper column member 2, but the upper column of the upper column member 2 will be constructed later on site Main reinforcement 4 may be inserted. In addition, the specific configuration, shape, arrangement, quantity, material, procedure, and the like of each member and part can be appropriately changed without departing from the spirit of the present invention. Moreover, it is also possible to combine the said embodiment. On the other hand, all the elements and procedures shown in the above embodiment are not necessarily essential, and may be selected as appropriate.

1 Lower column member (concrete member)
1a Upper surface (bonding surface)
1b Front (outside)
1e Left side (outside)
2 Upper column member (other members)
3 lower column main bar 4 upper column main bar 5 sleeve joint 5a hole 5b grout inlet 7 grout injection passage 12 nozzle pipe 12a nozzle 22 nozzle pipe 22a nozzle 31 connecting member (concrete member)
31a Upper surface (bonding surface)
31e Left side (outside)
32 through holes 32b grout inlet

Claims (2)

A method of constructing a concrete member filled with grout, comprising:
A plurality of holes having a grout inlet are provided at the joint surface with other members, and a grout injection passage extending from the outer surface different from the joint surface to the plurality of grout inlets via the plurality of branches is provided. Providing a fixed concrete member,
Inserting the reinforcing bar of the other member into the hole;
Providing a nozzle tube having a nozzle for discharging the supplied grout;
Inserting the nozzle tube into the grout injection passage from the outer surface side;
And discharging the grout from the nozzle to the grout injection passage in a state where the nozzle is disposed at a position corresponding to each of the branch portions. A plurality of holes having a grout inlet are provided at the joint surface with other members, and a grout injection passage extending from the outer surface different from the joint surface to the plurality of grout inlets via the plurality of branches is provided. A grout filling method for a given concrete member,
Providing a nozzle tube having a nozzle for discharging the supplied grout;
Inserting the nozzle tube into the grout injection passage from the outer surface side;
And discharging the grout from the nozzle to the grout injection passage in a state where the nozzle is disposed at the position corresponding to each branch portion.

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