Grout filling structure and grout filling method in beam-column connection

Abstract

To provide a structure for efficiently and surely bonding a precast beam member to a beam-column connection.SOLUTION: A grout filling structure 10 is provided in a beam-column connection 1 in which a sleeve S is embedded for connecting beam main reinforcement ends of precast beam members 5 to be bonded from the side face. In a beam-column connection member 1, provided are: a first filling path through which a grout material G is sequentially filled from an inner part of the sleeve S, in which beam main reinforcements 7 are inserted and which is connected to a first grout injection pipe 21, into an inner part of a beam main reinforcement through hole 12, and into a joint space C3 between the precast beam members 5; and a second filling path through which the beam main reinforcement through hole 12 with the beam main reinforcements 7 inserted through a second grout injection pipe 22 connected to the beam main reinforcement through hole 12, and the joint space C3 between the precast beam members 5 are sequentially filled with a grout material G.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grout filling structure and a grout filling method for a column-beam joint, and more particularly to a grout filling structure and a grout filling method for efficiently filling grout into grout-filled joints provided in a precast concrete column-beam joint, beam main reinforcement through holes, and joint spaces between joint members. [Background technology]

[0002] In precast reinforced concrete (hereinafter simply referred to as precast) frames, composite members are manufactured by integrating precast beam-column joint members with precast beams in order to streamline the construction of the precast frame. Furthermore, in order to rationally join the composite member with other precast beam members, a method for constructing a column-beam joint structure has also been proposed in which joint members (mechanical joints) for the main beam reinforcement are embedded in the column-beam joint members (Patent Document 1).

[0003] In the method for constructing a beam-column joint structure using a mechanical joint disclosed in Patent Document 1, a filler injection port is provided at the longitudinal center of the mechanical joint. A precast beam is attached to the beam-column joint, and with the ends of the main beam reinforcement positioned inside the mechanical joint, filler is injected into the mechanical joint through the injection port. By further injecting the filler, the filler reaches the inside of the sheath pipes connected to both ends of the joint, fixing the main beam reinforcement of the precast beam at the beam-column joint and joining the main beam reinforcement to each other. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-167689 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, in the filling path of the filler disclosed in the method for constructing a beam-column joint structure in Patent Document 1, the injection port is located in the longitudinal center of the mechanical joint, so the filler injected from the injection port at a predetermined injection pressure is divided into two directions toward both ends of the joint, filling the gap space within the joint into which the main beam reinforcement is inserted toward both ends, and further filling the gap space within the sheath pipe connected to the end of the joint so as to communicate with the joint.

[0006] With this type of filling path, the filler material splits into two directions toward both ends within the joint, significantly reducing the injection pressure of the filler material and making it difficult to reach the inner end of the sheath pipe. Also, since it is not designed to fill the joint space that occurs between the column-beam joint and the beam end, a separate filling operation is required.

[0007] Therefore, the object of the present invention is to solve the problems of the conventional technology described above and to provide a grout filling structure and grout filling method for a column-beam joint, which reliably fills the grout filling joint for fixing the main beam reinforcement installed in the column joint, through the beam main reinforcement penetration hole, and into the joint between the column-beam joint member and the end face of the beam member. [Means for solving the problem]

[0008] The grout-filled structure for a beam-column joint of the present invention is provided in a beam-column joint in which grout-filled joints are embedded, which join the respective ends of upper and lower beam main reinforcements of precast beam members that are installed on an upright column member and joined from the sides opposite each other, and which fills grout material into the sleeve of the grout-filled joint, the beam main reinforcement through-holes that communicate with the sleeve, and the joint space provided between the precast beam member and the grout-filled joint, and The present invention is characterized in that a first filling path is provided at each of the reinforcing bar positions of the upper beam main reinforcement and the lower beam main reinforcement, which sequentially fills the grout material from inside the sleeve into which the beam main reinforcement has been inserted through a first grout injection pipe into the beam main reinforcement through-hole and into the joint space between the precast beam member, and a second filling path is provided at each of the reinforcing bar positions of the upper beam main reinforcement and the lower beam main reinforcement, which sequentially fills the grout material from inside the sleeve into which the beam main reinforcement has been inserted through a first grout injection pipe into the beam main reinforcement through-hole and into the joint space between the precast beam member and the precast beam member, through a second grout injection pipe connected to the beam main reinforcement through-hole.

[0009] It is preferable that one ends of the first and second grout injection pipes are grout injection ports located on the upper surface of the beam-column joint.

[0010] The other end of the first grout injection pipe is preferably connected to the sleeve near the closed end of the sleeve.

[0011] The other end of the second grout injection pipe is preferably connected to the beam main reinforcement through hole near the closed end of the sleeve.

[0012] It is preferable that, with the beam main reinforcement inserted inside, one end of the sleeve is closed between its inner peripheral surface and the beam main reinforcement, forming a closed end, and the other end is an open end.

[0013] A grout filling method using the grout filling structure of the beam-column joint described above is characterized in that grout material is filled through the first grout filling path and the second grout filling path connected to the lower beam main reinforcement side into the beam main reinforcement through-holes and grout-filled joints at the positions where the lower beam main reinforcement is arranged and up to a part of the joint space between the precast beam member, and then through the first grout filling path and the second grout filling path connected to the upper beam main reinforcement side, grout material is filled from the filled part into the beam main reinforcement through-holes and grout-filled joints at the positions where the upper beam main reinforcement is arranged and the joint space between the precast beam member to the upper surface of the beam-column joint. [Effects of the Invention]

[0014] According to the grout filling method using the grout filling structure of the beam-column joint of the present invention, it is expected that grout can be reliably and efficiently filled into the grout-filled joints provided in the beam-column joint, into the beam main reinforcement through holes, and into the joint spaces between the joint members. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view showing the overall shape of a precast composite member manufactured as a single unit from a beam-column joint member and a beam member, the beam member having the grout-filled structure of the present invention therein. [Figure 2] 2 is an explanatory diagram (plan view, elevation view) showing the state in which a precast beam member is joined to the precast composite member shown in FIG. 1. [Figure 3] 2A and 2B are a plan view, an elevation view, and a side view showing the external shape and internal configuration (shown by dashed lines) of the column-beam joint member shown in FIG. 1. [Figure 4] 4A and 4B are cross-sectional views taken along the IVa-IVa and IVb-IVb cross-sectional lines of the beam-column joint member shown in FIG. 3(b). [Figure 5] 3(a) is a front cross-sectional view taken along the Va-Va cross-sectional line of the beam-column joint member shown in FIG. 3(a), FIG. 5(b) is a side cross-sectional view taken along the Vb-Vb cross-sectional line in FIG. 5(a), and FIG. 5(c) is a side cross-sectional view taken along the Vc-Vc cross-sectional line. [Figure 6] A partially enlarged cross-sectional view showing the grout-filled joint with the main beam reinforcement inserted, the cross-sectional shape of the main beam reinforcement penetration hole, and the state in which the grout injection pipe is connected. [Figure 7] A front view showing the temporary joint state of the precast beam members at the column-beam joint, with a partial cross section (state explanation diagram (part 3)). [Figure 8] An explanatory diagram (part 1) showing the state in which the column-beam connection member is hung down over the column member to be joined to the column member. [Figure 9] An explanatory diagram (part 2) showing how a precast beam member is joined from the side to the column-beam joint constructed on the column member shown in Figure 8. [Figure 10] This is a diagram (part 4) illustrating the state in which grout material is filled into the lower grout-filled joint, the beam main reinforcement penetration holes, and the joint spaces between the components through the grout filling path provided in the column-beam joint in the temporary joint state of the precast beam components shown in Figure 7 (diagram (part 3)). [Figure 11] An explanatory diagram (part 5) showing the state in which, after the grout filling state shown in Figure 10, grout is subsequently filled into the upper grout-filled joint, the beam main reinforcement penetration holes, and the joint spaces between components. [Figure 12] A front view, partially in cross section, showing the temporary connection of a precast beam member to a column-beam joint member in which a grout-filled joint is installed so as to contact the side surface of the column-beam joint member. DETAILED DESCRIPTION OF THE INVENTION

[0016] The configuration of the grout-filled structure for a beam-column joint of the present invention will be described below with reference to the accompanying drawings. Note that in this specification, the beam-column joint member and the beam-column joint refer to the same location, but when it is treated as a precast composite member 3 as shown in Figure 1, it will be referred to as a beam-column joint member, and when it is constructed on a column member and functions as part of a structure, it will be referred to as a beam-column joint.

[0017] Fig. 1 shows the overall shape of a precast composite member 3 manufactured as a single unit from a beam-column connection member 1 equipped with a grout-filled structure 10 of the present invention therein and a beam member 2. Each figure in Fig. 2 shows the state in which a precast beam member 5 is joined to the precast composite member 3 shown in Fig. 1. Each figure in Fig. 3 shows the external shape and internal configuration (shown by dashed lines) of the beam-column connection member 1 shown in Fig. 1.

[0018] The external shape and internal configuration of the beam-column connection member 1 will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 2, the beam-column connection member 1 of this embodiment is a precast member that constitutes part of a precast composite member 3 and has a cross-sectional shape roughly identical in size to the planar cross-section of the underlying column member 4. The member height is set equal to the beam depth of the integrally manufactured beam member 2. While FIG. 1 depicts a precast composite member 3 in which a beam member 2 is integrally joined to the beam-column connection member 1, it goes without saying that the grout-filled structure 10 of the present invention can also be applied to a column-beam joint structure in which only the beam-column connection member 1 is manufactured as a single precast member and that single precast member is placed on top of the column member 4.

[0019] As shown in Figures 1 and 3(a)-(c), the beam-column joint member 1 has 12 column main reinforcing bar through-holes 11 that penetrate vertically through the member 1, evenly spaced along the periphery with a predetermined cover from the outer periphery. These column main reinforcing bar through-holes 11 are formed by embedding and installing a tubular body (not shown) serving as a formwork in a predetermined position within the member. Ring-shaped or spiral-shaped uneven ribs are preferably provided on the inner and outer periphery of the tubular body at predetermined intervals along the longitudinal direction of the tubular body. These tubular bodies may be removed after pouring the concrete for the beam-column joint member, or they may be left in the concrete to function as retaining members for the wall of the column main reinforcing bar through-holes 11 and beam main reinforcing bar through-holes 12. Providing uneven portions or roughening the wall of the through-holes allows for integration with the filler material, such as grout, that fills the through-holes after the column main reinforcing bars 6 and beam main reinforcing bars 7 are inserted. As the pipe to be placed in the concrete, a ready-made sheath pipe or a box-out pipe with ribs can be used.

[0020] In addition, among the side surfaces of the column-beam connection member 1, beam main reinforcement through holes 12 (hereinafter, when distinguishing between the upper and lower reinforcement positions of the beam main reinforcement 7 and explaining them separately, the subscripts U and L are added, respectively) that penetrate between the side surfaces 1a perpendicular to the side surface to which the beam member 2 is integrally joined are formed in two rows of three, upper and lower, at equal intervals in the horizontal direction.

[0021] The beam reinforcing bar through holes 12 anchor the ends of the beam reinforcing bars 7 of the precast beam members 5 shown in Figures 2 and 3 within the beam-to-column joint member 1, and also guide and hold the beam reinforcing bars 7 to the joints that join them. Grout-filled joints 20 embedded in the beam-to-column joint 1 are used to connect the beam reinforcing bars 7. The beam reinforcing bar through holes 12 are connected to both ends of the grout-filled joint 20 so that they communicate with each other. The ends of the beam reinforcing bars 7 that pass through the beam reinforcing bar through holes 12 extend into the grout-filled joint 20. The beam reinforcing bar through holes 12 are also formed by embedding a pipe (not shown) similar to the column reinforcing bar through holes 11. Although this specification refers to a grout-filled joint, various mechanically filled joints can be used. These joints anchor the ends of reinforcing bars inserted from both sides into the joint by filling the sleeve S that constitutes the joint with various filler materials, thereby mechanically joining the reinforcing bars.

[0022] Furthermore, a cotter 1b is formed at the center of each side surface that will be the joint surface with the precast beam member 5 (Figs. 1, 2, and 9). The cotter 1b has a rectangular shape with a shallow depression in the concrete surface, and as will be described later, functions as a shear resistance element 9 when grout is completely filled in the joint space C3 at the cotter opposing part 8 formed opposite the cotter 5b (Fig. 9) of the same shape that is formed on the beam end surface of the precast beam member 5 that is joined to the column-beam joint 1 (Figs. 7 and 11).

[0023] The configurations of the grout filled joint 20 and the grout injection pipes 21, 22 will be described below with reference to FIGS. Figure 4(a) shows a cross section along the IVa-IVa cross section line of the beam-column joint member 1 shown in Figure 3(b), i.e., a planar cross section shape that shows the lower half of the inner peripheral surface of the beam main reinforcing bar through hole 12L of the lower beam main reinforcing bar 7L (Figure 7) and the upper surface of the grout-filled joint 20L embedded at approximately the center of the beam-column joint member 1 so that both ends communicate with the beam main reinforcing bar through hole 12L. Similarly, Figure 4(b) shows a planar cross section along the IVb-IVb cross section line (Figure 3(b)) that shows the lower half of the inner peripheral surface of the beam main reinforcing bar through hole 12U of the upper beam main reinforcing bar 7U and the upper surface of the grout-filled joint 20U.

[0024] As shown in FIG. 6(a), the grout-filled joint 20 of this embodiment (described using the grout-filled joint 20L for the lower beam main reinforcement 7L as an example) consists of a hollow tubular sleeve S with an inner diameter sufficiently larger than the rebar diameter of the beam main reinforcement 7L to be joined inside. The overall length of the sleeve S is set to a dimension that allows the ends of each beam main reinforcement 7L inserted into the sleeve S from both ends to be anchored with sufficient anchorage length. Also, as shown in FIGS. 4(a) and 4(b), a grout injection port 24 is formed on the top surface of one end of the sleeve S. The tip of a grout injection pipe 21L is connected to this grout injection port 24. As shown in FIG. 6(a), a ring-shaped sealant 25 is attached to the end of the sleeve S near this grout injection port 24. When the end of the beam main reinforcement 7L is inserted into the sleeve S, one end of the sleeve S becomes a closed end. On the other hand, the other end is an open end. When the end of the beam main reinforcement 7L is inserted into the sleeve S, a roughly cylindrical gap C1 is formed between the beam main reinforcement 7L and the inner peripheral surface of the sleeve S. As will be described later in the grout filling process, when the grout is filled into the sleeve S through the grout injection port 24, it fills the gap C1 so as to surround the beam main reinforcement 7L inside the sleeve S, and excess grout is discharged from the open end of the sleeve S.

[0025] 6(b) shows an example in which a sleeve S of a known grout filled joint 20 is used as the grout filled joint 20 for use in the grout filled structure 10 of the present invention. As shown in the figure, the known grout filled joint 20 has two identical openings 26 formed at both ends of the sleeve S, which serve as a grout injection inlet and a grout discharge outlet. When this type of sleeve S is applied to the grout filled structure 10 of the present invention, one opening 26a, which serves as the grout discharge outlet, is closed with a sealant 27 before use.

[0026] The grout injection pipes 21, 22 provided in the beam-column joint member 1 and constituting the grout-filled structure 10 of the present invention will now be described with reference to Figures 3(a) and 5. The grout-filled structure 10 of this embodiment is composed of two systems: a first filling path that directly fills the grout material into each sleeve S of the grout-filled joints 20U, 20L of the upper beam main reinforcement 7U and the lower beam main reinforcement 7L, and a second filling path that fills the grout material into the beam main reinforcement through holes 12U, 12L that communicate with the grout-filled joints 20U, 20L. The injection ports 23 (starting ends) of each grout injection pipe 21, 22 are located on the top surface of the beam-column joint member 1 (Figure 3(a)).

[0027] In the grout-filled joints 20U, 20L of the upper beam main reinforcement 7U and the lower beam main reinforcement 7L, the tips of the grout injection pipes 21U, 21L, which serve as the first grout injection pipes constituting the first filling path, are connected to grout injection ports 24 provided on the upper end surfaces of the sleeves S of the grout-filled joints 20U, 20L, respectively (FIGS. 5(a) and 5(b)). The grout injection pipe 21U connected to the upper beam main reinforcement through hole 12U is a short pipe that is piped from the sleeve S of the grout-filled joint 20U toward the top surface of the beam-column connection member 1. On the other hand, the grout injection pipe 22L connected to the lower beam main reinforcement through hole 12L is a long pipe that is piped toward the top surface of the beam-column connection member 1 at a slight angle so as to avoid the grout-filled joints 20U of the upper beam main reinforcement 7U. In this embodiment, a flexible synthetic resin hose is used for each grout injection pipe 21, but a thin, bendable steel pipe with a small diameter or the like can also be used.

[0028] The grout injection pipes 22U, 22L as the second grout injection pipes constituting the second filling path are the same shape as the grout injection pipes 21U, 21L of the first filling path, as shown in Figures 5(a) and (c), and are installed close to the grout injection pipes 21U, 21L of the first filling path, with their tips connected to the beam main reinforcement through holes 12U, 12L near the sleeve closed ends of the grout filling joints 20U, 20L of the upper beam main reinforcement 7U and the lower beam main reinforcement 7L, respectively.

[0029] Below, we will explain the procedure for joining a column-beam joint member 1 having the grout filling structure 10 of the present invention inside it to a precast column member 4 and a precast beam member 5, and the method for filling grout into the gap spaces C1, C2 in the grout filling joints 20U, 20L and the joint space C3 between the members using the first filling path and the second filling path that constitute the grout filling structure 10, with reference to Figures 7 to 11. Figure 7 shows a partial cross section of two precast beam members 5 temporarily joined to the beam-column joint 1 of a precast composite member 3 (Figure 1) joined onto a column member 4 in the lower layer. In this temporarily joined state, grout has been filled into the gaps (not shown) of the column main reinforcing bar penetration holes 11 around the column main reinforcing bars 6, but grout has not yet been filled into the beam main reinforcing bar penetration holes 12U, 12L. Therefore, each precast beam member 5 is held in its intended construction position by supports (not shown).

[0030] Figure 8 shows a state in which a beam-column connection member 1, which constitutes part of a precast composite member 3 (Figure 1), is suspended above a column member 4 in order to be joined to the column member 4 in the lower layer. The upper ends of 12 column main reinforcements 6 protrude from the top surface of the column member 4 in the lower layer. The entire beam-column connection member 1 is placed on the column member 4 so that these column main reinforcements 6 are inserted into the column main reinforcement through holes 11 (Figures 1 and 3(a)) formed in the beam-column connection member 1. With the beam-column connection member 1 placed on the column member 4, the column main reinforcements 6 protrude by a predetermined anchorage length from the top surface of the beam-column connection member 1. Next, as shown in Figure 9, a precast beam member 5 is temporarily joined to the side surface 1a of the beam-column connection portion 1, which is placed on the column member 4 and has grout-filled column main reinforcement through holes 11 through which the column main reinforcements 6 are inserted. At this time, the ends of the main beam reinforcement 7U, 7L of the precast beam member 5 are inserted through the main beam reinforcement through-holes 12U, 12L to approximately the center position within the sleeve S of the grout-filled joints 20U, 20L, as shown in Figures 6(a) and 7.

[0031] 10 and 11 show the steps of the grout filling method in which grout material is filled through the grout filling path provided in the beam-column joint 1 into the sleeves S of the grout-filled joints 20U and 20L of the upper beam main reinforcement 7U and the lower beam main reinforcement 7L, the gap spaces C1 and C2 in the beam main reinforcement through holes 12U and 12L that communicate with the grout-filled joints 20U and 20L, and the joint space C3 between each member in the temporarily joined state of the precast beam member 5 shown in Fig. 7. The grout filling work G is performed in two steps, one around the lower beam main reinforcement 7L and one around the upper beam main reinforcement 7U.

[0032] 10 shows the operation of filling grout G into the sleeve S of the grout-filled joint 20L of the lower beam main reinforcement 7L, the beam main reinforcement through-hole 12L communicating with the grout-filled joint 20L, and the joint space C3 between each member. As shown in the figure, the operation of filling grout G is carried out simultaneously through a first filling path that directly fills the grout G into the sleeve S of the grout-filled joint 20L of the lower beam main reinforcement 7L, and a second filling path that fills the grout G into the beam main reinforcement through-hole 12L communicating with the grout-filled joint 20L. That is, the filling work is carried out by simultaneously pumping grout material G, which has been pumped from a grout pump (not shown), into the grout injection pipes 21L and 22L from the grout injection port 23 of the first filling path that appears on the top surface of the column-beam joint member 1 and the grout injection port 23 of the second filling path that is located next to the grout injection port 23.

[0033] As shown by the arrows in Figure 10, the grout G pumped through the first filling path travels from grout injection port 23 through long grout injection pipe 21L to injection port 24 near the closed end of sleeve S of grout-filled joint 20L of lower beam main reinforcement 7L, filling sleeve S and then filling the gap space C1 around beam main reinforcement 7L in one direction toward the open end. After filling gap space C1 within sleeve S and being discharged from the open end, grout G further fills gap space C2 around beam main reinforcement 7L within beam main reinforcement through hole 12L connected to sleeve S, and then rises upward from the bottom to fill joint space C3 between beam-column joint 1 and precast beam member 5. Finally, grout G reaches cotter-facing portion 8 formed at the joint surface between beam-column joint 1 and beam member 5.

[0034] The grout material G pumped through the second filling route is filled, as shown by the arrow in Figure 10, from the grout injection port 23 through the long grout injection pipe 22L into the beam main reinforcement through hole 12L connected to the closed end side of the sleeve S of the grout filling joint 20L of the lower beam main reinforcement 7L, filling the gap space C2 around the beam main reinforcement 7L inside the beam main reinforcement through hole 12L, and is discharged from the opening on the side of the column-beam joint 1 into the joint space C3 between the column-beam joint 1 and the beam member 5, and as in the case of the first filling route, fills the joint space C3 from the bottom up to the cotter opposing part 8.

[0035] Figure 11 shows the work of filling grout material G using a first filling path, which fills grout material G directly into the sleeve S of the grout-filled joint 20U of the upper beam main reinforcement 7U, and a second filling path, which fills grout material G into the beam main reinforcement through hole 12U that communicates with the grout-filled joint 20U of the upper beam main reinforcement 7U. The work of filling grout material G into the upper beam main reinforcement 7U is carried out following the work of filling the lower beam main reinforcement 7L.

[0036] As shown in Figure 11, in the grout filling work for the upper beam main reinforcement 7U, the grout material G is filled into the sleeve S of the grout filled joint 20U and into the beam main reinforcement penetration hole 12U through the first filling path, and the grout material G discharged from the opening on the side of the column-beam joint 1 flows down through the joint space C3 between the column-beam joint 1 and the precast beam member 5, filling the remaining upper space in the cotter opposing part 8 that has already been filled with grout material G during the filling work for the lower beam main reinforcement 7L and the joint space C3 above the cotter opposing part 8, thereby forming a shear resistance element 9, and the filling work of the grout material G through the first filling path is completed when the grout material G overflows from the top surface of the joint.

[0037] The grout material G pumped through the second filling route is also filled from the grout injection port 24 into the beam main reinforcement through hole 12U that communicates with the closed end side of the sleeve S of the grout filling joint 20U of the upper beam main reinforcement 7U, and is discharged into the joint space C3. As in the case of the first filling route, it fills the joint space C3 above the cotter opposing part 8 to form a shear resistance element 9, and the grouting work using the second filling route is completed when the grout material G overflows from the top surface of the joint.

[0038] Figure 12 shows a modified example of the grout-filled structure 10, in which only the first grout-filling path is used. In this modified example, the grout-filled joints 20U and 20L for connecting the upper beam main reinforcement 7U and the lower beam main reinforcement 7L are positioned adjacent to the opposite side surface 1a of the beam-column joint 1, as shown in the figure. By positioning the grout-filled joints 20U and 20L in this manner, the grout material injected into the sleeve S from near the closed end of the sleeve S of the grout-filled joints 20U and 20L for the lower beam main reinforcement 7L fills the gap space C1 in one direction toward the open end. After filling the gap space C2 around the beam main reinforcement in the beam main reinforcement through holes 12U and 12L, the grout material is then filled from the open end of the beam-column joint member 1 into the joint space C3 up to the joint edge. Next, by similarly injecting grout material from the first filling path of the upper beam main reinforcement 7U, the grout material can be reliably filled into the sleeve S of the grout-filled joint 20U, the gap spaces C1 and C2 in the beam main reinforcement through hole 12U, and the joint space C3 between the beam members.

[0039] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. In other words, embodiments obtained by combining technical means modified appropriately within the scope of the claims are also included in the technical scope of the present invention. [Explanation of symbols]

[0040] 1. Column-beam joint (column-beam joint member) 2 Beam members 3 Precast composite members 4 Pillar members 5 Precast beam members 6 Column reinforcement 7,7U,7L beam main reinforcement 8 Cotter facing part 9 Shear Resistance Elements 10 Grout-filled structure 11 Column main reinforcement through hole 12,12U,12L Beam main reinforcement through hole 20, 20U, 20L Grout-filled joints 21, 21U, 21L Grout injection pipe (for the first filling path) 22, 22U, 22L Grout injection pipe (for second filling path) 23 Grout inlet (top surface of column-beam joint) 24 Grout injection port (top of sleeve) G Grout material S sleeve C1, C2 gap space C3 Joint space

Claims

1. A grout-filled structure for a column-beam joint is provided in a column-beam joint in which a grout-filled joint is embedded to join the respective ends of upper and lower beam main reinforcements of a precast beam member that is installed on an upright column member and joined from the side opposite to each other, and in which grout material is filled into a sleeve of the grout-filled joint, into a beam main reinforcement through hole that communicates with the sleeve, and into a joint space provided between the precast beam member and the grout-filled joint, a first filling path for sequentially filling the grout material from inside the sleeve into which the beam main reinforcement is inserted through a first grout injection pipe connected to the sleeve, into the beam main reinforcement through-hole, and into the joint space between the precast beam member; a second filling path for sequentially filling the grout material into the beam main reinforcement through-hole into which the beam main reinforcement has been inserted through a second grout injection pipe connected to the beam main reinforcement through-hole and into the joint space between the precast beam member; A grout-filled structure for a beam-column joint, characterized in that it is provided at each of the positions of the upper beam main reinforcement and the lower beam main reinforcement.

2. 2. The grout filling structure for a beam-column joint according to claim 1, wherein one end of each of the first and second grout injection pipes is a grout injection port located on the upper surface of the beam-column joint.

3. The grout filling structure for a beam-column joint according to claim 1 , wherein the other end of the first grout injection pipe is connected to the sleeve near the closed end of the sleeve.

4. 2. The grout filling structure for a beam-column joint according to claim 1, wherein the other end of the second grout injection pipe is connected to the beam main reinforcement through hole near the closed end of the sleeve.

5. 5. A grout filling structure for a beam-column joint according to claim 3 or claim 4, wherein, when the beam main reinforcement is inserted inside the sleeve, one end of the sleeve is closed between its inner surface and the beam main reinforcement, forming a closed end, and the other end is open.

6. Using the grout filling structure according to claim 1, grout material is filled through the first filling path and the second filling path connected to the lower beam main reinforcement side into the beam main reinforcement through-hole and grout filled joint at the position where the lower beam main reinforcement is arranged, and up to a part of the joint space between the precast beam member, Next, grout is filled into the beam main reinforcement through-holes and grout-filled joints at the positions where the upper beam main reinforcement is arranged, and into the joint spaces between the precast beam members, through the first filling path and the second filling path connected to the upper beam main reinforcement side, from the filled areas to the top surface of the beam joint.

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