PC member joining method, PC member joining structure, and grout filling method

Abstract

To enable grout filling to be efficiently executed when PC members are joined.SOLUTION: A PC member joining method joins a first PC member having a first lateral face from which reinforcement protrudes sideways and a second PC member, which is provided on lateral side of the first PC member and has a second lateral face facing the first lateral face, an insertion port into which the reinforcement is inserted on the second lateral face, and a sleeve coupling having a reinforcement insertion port communicating with the insertion port. A sheath pipe for allowing the reinforcement to be inserted is provided at least on either one of the first and second PC members. The first and second PC members are installed so that a joint is formed between the first lateral face and the second lateral face, and a tip of the reinforcement is inserted into the sleeve coupling. Grout is continuously filled into the joint, the sheath pipe, and the sleeve coupling by injecting the grout into the joint so as to make the grout flow from the joint into the sheath pipe and the sleeve coupling.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a PC member joining method for joining PC members by filling them with grout, a PC member joining structure, and a grout filling method. [Background technology]

[0002] Patent Document 1 discloses a construction method for constructing a frame structure by repeatedly moving a precast concrete (PC) beam member 100 laterally and joining it to a PC joint portion 104 of a PC column member 102, as shown in an example in Figure 1. The PC beam member 100 has main beam reinforcement 106 protruding from one end face, and a rebar insertion port 101 exposed at the other end face for inserting the PC beam member 100. In addition, a sheath tube 113 for inserting the main beam reinforcement 106 is provided at the PC joint portion 104, and openings 113a at both ends of the sheath tube 113 are exposed on the side surface.

[0003] In this construction method, the PC beam member 100 is moved laterally as shown by arrow X, and the PC beam member 100 is erected so that the main beam reinforcement 106 penetrates the sheath pipe 113 provided in the PC joint portion 104 and the tip is inserted into the sleeve joint provided in the PC beam member 100A through the reinforcing bar insertion port 101 of the PC beam member 100A whose tip has already been installed. Note that one end opening of the sheath pipe (not shown) is exposed at the reinforcing bar insertion port 101, and the sleeve joint is connected to the other end opening, but in some cases the reinforcing bar insertion port of the sleeve joint may be exposed.

[0004] Then, grout is filled into the sheath pipe 113 of the PC joint portion 104, and if a sheath pipe is provided in the PC beam member 100A, the sheath pipe and sleeve joint, and grout is filled into the joints between the side of the PC joint portion 104 and the end faces of the PC beam members 100 and 100A, thereby joining the PC beam member 100, the PC joint portion 104, and the PC beam member 100A. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-225897 Summary of the Invention [Problem to be solved by the invention]

[0006] As mentioned above, when joining rebars protruding from the side of a PC member (corresponding to the end face of the beam in the above construction method) by inserting them through a sheath pipe and into the sleeve joint of the PC member to be joined, it is necessary to inject grout into the joints between the PC members, the sheath pipe, and the sleeve joint. If these grout injections were to be carried out in separate processes, there would be an increase in labor hours and a decrease in construction efficiency, which was an issue.

[0007] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to enable efficient grout filling when joining PC members. [Means for solving the problem]

[0008] In order to achieve this object, the present invention provides a method for joining a first PC member having a first side surface from which a reinforcing bar protrudes laterally, and a second PC member having a second side surface provided on the side of the first PC member and facing the first side surface, an insertion port for inserting the reinforcing bar provided on the second side surface, and a sleeve joint for connecting the reinforcing bar, wherein at least one of the first PC member and the second PC member is provided with a sheath tube for inserting the reinforcing bar, and the method comprises: an installation step of installing the first PC member and the second PC member so that a joint is formed between the first side surface and the second side surface and the tip of the reinforcing bar is inserted into the sleeve joint; and a grout filling step of injecting grout into the joint and allowing the grout to flow from the joint into the sheath tube and the sleeve joint, thereby filling the joint, the sheath tube, and the sleeve joint successively with grout.

[0009] According to the present invention, grout is injected into the joint between the first and second PC members, and the grout flows from the joint into the sheath pipe and sleeve joint. This allows the joint, sheath pipe, and sleeve joint to be filled with grout continuously, thereby enabling efficient grout filling when joining PC members.

[0010] In the present invention, the sheath tube is provided on both the first PC member and the second PC member, one end opening of the sheath tube provided on the second PC member is exposed in the insertion port provided on the second side surface, the sleeve joint is provided so that the reinforcing bar insertion port is connected to the opening at the end opposite to the one end of the sheath tube provided on the second PC member, and when the reinforcing bar is inserted into the sheath tube provided on the first PC member and protrudes from the sheath tube, in the installation step, the first PC member and the second PC member are installed so that the reinforcing bar passes through the sheath tube provided on the second PC member and has its tip inserted into the sleeve joint.

[0011] Furthermore, when a third PC member is joined together with the first PC member and the second PC member, the third PC member being provided on the opposite side to the side to which the second PC member is joined and having a third side surface facing the side surface opposite to the first side surface of the first PC member, and a sheath tube provided on the first PC member passes laterally through the first PC member with openings at both ends exposed to the first side surface and the opposite side surface, and the reinforcing bars protruding from the first side surface of the first PC member are reinforcing bars that pass through the sheath tube provided on the first PC member and protrude from the first side surface, the installing step includes joining the first PC member, the second PC member, and the third PC member together so that a first joint is formed between the first side surface and the second side surface. and a second joint is formed between the third side surface and the opposite side surface of the first PC member, and a reinforcing bar protruding from the third PC member passes through a sheath pipe provided on the first PC member and further passes through a sheath pipe provided on the second PC member, and is installed so that its tip is inserted into the sleeve joint, and in the grout filling step, grout is injected into the second joint, flows from the second joint through the sheath pipe provided on the first PC member, into the first joint, flows from the first joint into the sheath pipe provided on the second PC member, and further flows into the sleeve joint, thereby continuously injecting grout into the second joint, the sheath pipe provided on the first PC member, the first joint, the sheath pipe provided on the second PC member, and the sleeve joint.

[0012] Furthermore, if the reinforcing bars protruding from the first side surface of the first PC member protrude from the first side surface from the side of the first PC member opposite to the side where the second PC member is joined, by passing through a sheath tube provided on the first PC member, in the grout filling process, grout is injected into the joint, flows from the joint into the sheath tube provided on the first PC member, and then flows into the sleeve joint, thereby continuously injecting grout into the joint, the sheath tube provided on the first PC member, and the sleeve joint.

[0013] Furthermore, in the present invention, when the sheath tube is provided only on the first PC member and the reinforcing bar insertion port of the sleeve joint is exposed at the insertion port of the second PC member, in the grout filling process, grout is flowed into the sleeve joint through the reinforcing bar insertion port exposed at the joint.

[0014] The method further comprises joining a third PC member, the third PC member being provided on the opposite side of the first PC member to the side where the second PC member is joined, and having a third side surface facing the side surface of the first PC member opposite the first side surface, together with the first PC member and the second PC member, wherein a sheath tube provided on the first PC member passes laterally through the first PC member with openings at both ends exposed to the first side surface and the opposite side surface, and the reinforcing bars protruding from the first side surface of the first PC member are reinforcing bars that pass through the sheath tube provided on the first PC member and protrude from the first side surface, and the third PC member is installed so that a first joint is formed between the first side surface and the second side surface, a second joint is formed between the third side surface and the opposite side surface of the first PC member, and the reinforcing bars protruding from the third PC member pass through sheath pipes provided in the first PC member and have their tips inserted into the sleeve joints, and in the grout filling step, grout is injected into the second joints, flows from the second joints through the sheath pipes provided in the first PC member into the first joints, and flows from the first joints into the sleeve joints, thereby continuously injecting grout into the second joints, the sheath pipes provided in the first PC member, the first joints, and the sleeve joints.

[0015] In addition, the reinforcing bars protruding from the first side surface of the first PC member are inserted into a sheath tube provided on the first PC member and protrude from the first side surface, and in the grout filling process, grout is injected into the first joint, flows from the first joint into the sheath tube provided on the first PC member, and then flows into the sleeve joint, thereby continuously injecting grout into the first joint, the sheath tube provided on the first PC member, and the sleeve joint.

[0016] Furthermore, in the present invention, when the sheath tube is provided only on the second PC member, one end opening of the sheath tube is exposed at the insertion port of the second PC member, the sleeve joint is provided so that the reinforcing bar insertion port is connected to the other end opening of the sheath tube provided on the second PC member, and the reinforcing bar is embedded in the first PC member in advance and protrudes from the first side surface, in the installation step, the first PC member and the second PC member are installed so that the reinforcing bar passes through the sheath tube provided on the second PC member and has its tip inserted into the sleeve joint.

[0017] In addition, a grout injection passage may be formed in at least one of the first and third PC members, with one end opening to the opposing side surfaces of the first and third PC members and the other end opening to a surface other than the opposing side surfaces of the at least one PC member or to the outside of the at least one PC member, and in the grout filling process, grout may be injected into the second joint through the grout injection passage.

[0018] In addition, a grout injection passage may be formed in at least one of the first and second PC members, with one end opening to the first side surface or the second side surface and the other end opening to a surface other than the first side surface or the second side surface of the at least one PC member or to the outside of the at least one PC member, and in the grout filling process, grout may be injected into the second joint through the grout injection passage.

[0019] In this case, the grout injection passage may open on the side surface at a position lower than the center of the joint in the height direction. The present invention also includes a joined structure in which a first PC member and a second PC member are joined by the above-described method for joining PC members.

[0020] The present invention also provides a method for filling grout at a joint between a first PC member having a first side surface from which reinforcing bars protrude laterally, and a second PC member having a second side surface provided on the side of the first PC member, facing the first side surface and forming a joint between the first side surface and the second side surface, an insertion port through which the reinforcing bars are inserted provided on the second side surface, and a sleeve joint having a reinforcing bar insertion port communicating with the insertion port, wherein at least one of the first PC member and the second PC member is provided with a sheath tube through which the reinforcing bars are inserted, and grout is injected into the joint and allowed to flow from the joint into the sheath tube and the sleeve joint, thereby filling the joint, the sheath tube, and the sleeve joint successively with grout. [Effects of the Invention]

[0021] According to the present invention, grout filling can be carried out efficiently when joining PC members. [Brief explanation of the drawings]

[0022] [Figure 1] This is a diagram illustrating a conventional construction method for building a frame structure by joining PC beam members to PC joints. [Figure 2] 1A to 1C are diagrams illustrating a method for joining PC members according to a first embodiment of the present invention. [Figure 3] 10A to 10C are diagrams illustrating a method for joining PC members according to a second embodiment of the present invention. [Figure 4] 10A to 10C are diagrams illustrating a method for joining PC members according to a third embodiment of the present invention. [Figure 5] 10A to 10C are diagrams illustrating a method for joining PC members according to a fourth embodiment of the present invention. [Figure 6] 10A to 10C are diagrams illustrating a method for joining PC members in a fifth embodiment of the present invention. [Figure 7] 10A to 10C are diagrams illustrating a method for joining PC members in a sixth embodiment of the present invention. [Figure 8] 13A to 13C are diagrams illustrating a method for joining PC members in a seventh embodiment of the present invention. [Figure 9] 13A to 13C are diagrams illustrating a method for joining PC members in an eighth embodiment of the present invention. [Figure 10] 13A to 13C are diagrams illustrating a method for joining PC members according to a ninth embodiment of the present invention. [Figure 11] 13A to 13C are diagrams illustrating a method for joining PC members in a tenth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the first embodiment, as in the conventional construction method shown in Fig. 1, the PC beam member 100, the PC joint portion 104, and the PC beam member 100A are joined by filling them with grout. Note that the PC joint portion 104 is a part of the PC column member 102, but it may also be a PC joint member independent of the column.

[0024] FIG. 2 is a diagram for explaining this embodiment, showing a cross section of the joint of the PC beam member 100, the PC joint portion 104, and the PC beam member 100A. As explained with reference to Fig. 1, beam main reinforcements 106 protrude from the end face of the PC beam member 100. Although Fig. 2 shows two beam main reinforcements 106, an upper end reinforcement 106a and a lower end reinforcement 106b, multiple upper end reinforcements 106a and multiple lower end reinforcements 106b (for example, five) are provided in the beam width direction (depth direction of the page). Furthermore, the upper end reinforcements 106a and the lower end reinforcements 106b may each be provided in multiple rows (for example, two rows) above and below. A sheath tube 113 for inserting the main beam reinforcement 106 is provided penetrating horizontally in the PC joint section 104, and openings 113a and 113b (hereinafter referred to as sheath openings 113a and 113b) at the ends of the sheath tube 113 are exposed on both sides.

[0025] The PC beam member 100A is provided with a sheath tube 112 through which the beam main reinforcement bars 106 are inserted. An opening 112a at one end of the sheath tube 112 (hereinafter referred to as the sheath opening 112a) is exposed at the end face of the PC beam member 100A. The sheath tube 112 extends in the longitudinal direction of the PC beam member 100A, and a sleeve joint 108 is provided continuous with an opening at the other end (hereinafter referred to as the sheath opening 112b). In this embodiment, the location where the sheath opening 112a of the sheath tube 112 is exposed corresponds to the "insertion opening through which the reinforcing bars are inserted" in the present invention.

[0026] The sleeve joint 108 is a substantially cylindrical member with reinforcing bar insertion ports 108a formed on both ends, and one end (the left end in FIG. 2) is connected to the sheath opening 112b of the sheath tube 112. Therefore, the sleeve joint 108 is provided at a distance equal to the length of the sheath tube 112 from the end face of the PC beam member 100A, and therefore the sleeve joint 108 can be positioned away from the hinge region of the beam end.

[0027] Inside the PC beam member 100A, the main beam reinforcement 106 is inserted into the reinforcing bar insertion port 108a at the other end of the sleeve joint 108. The periphery of the main beam reinforcement 106 at the reinforcing bar insertion port 108a at the other end is sealed with a sealant 109 to prevent concrete from flowing into the sleeve joint 108 during the fabrication of the PC beam member 100A.

[0028] Two openings are provided near both ends of the side of the sleeve joint 108 for injecting grout into the sleeve joint 108 or discharging grout from the inside. Hereinafter, the opening closer to the surface of the PC member will be referred to as grout injection port 108b, and the opening farther from the surface of the PC member will be referred to as grout discharge port 108c. In this embodiment, the grout injection port 108b is not used, and therefore is sealed to prevent concrete from flowing into the sleeve joint 108 during the fabrication of the PC beam member 100A.

[0029] The PC beam member 100A is erected on the right side of the PC joint portion 104 in the drawing. Specifically, the end face of the PC beam member 100A faces the right side face of the PC joint portion 104 in the drawing so that the positions of the sheath opening 112a of the PC beam member 100A and the sheath opening 113b of the PC joint portion 104 are aligned, and the PC beam member 100A is erected so that a joint 110 is formed between them.

[0030] In this state, the PC beam member 100 is moved laterally toward the PC connection portion 104, as shown by arrow X in Fig. 1. As a result, as shown in Fig. 2, the main beam reinforcement 106 protruding from the end face of the PC beam member 100 penetrates the sheath tube 113 of the PC connection portion 104 and further penetrates the sheath tube 112 of the PC beam member 100A, with its tip inserted into the sleeve joint 108 through the reinforcing bar insertion port 108a, and a joint 114 is formed between the left side surface of the PC connection portion 104 in the drawing and the end face of the PC beam member 100. In this embodiment and other embodiments described later, a PC beam member is the object to be joined, and the "end face" of the PC beam member corresponds to the "side face" of the present invention.

[0031] As shown in FIG. 2, a grout injection passage 116 is provided inside the PC beam member 100. Both ends of the grout injection passage 116 open to the top surface and end surface of the PC beam member 100, respectively. The opening of the grout injection passage 116 on the top surface of the PC beam member 100 serves as an injection port 116a for injecting grout. The opening of the grout injection passage 116 on the end surface of the PC beam member 100 serves as an inlet 116b through which grout flows from the grout injection passage 116 into the joint 114. The position of the inlet 116b is preferably below the center position in the height direction of the PC beam member 100 (i.e., the height direction of the joint 114), and more preferably as low as possible within a range that does not structurally affect the bottom end reinforcement 106b. The grout injection passage 116 is formed by pouring concrete with a hose installed inside the formwork during the production of the PC beam member 100. Other passages in the PC member in this embodiment and the following embodiments are formed in a similar manner.

[0032] A grout discharge passage 118 is provided inside the PC beam member 100A. One end of the grout discharge passage 118 is connected to the grout discharge port 108c of the sleeve joint 108, and the other end opens to the top surface of the PC beam member 100A. A grout discharge passage 118 is provided corresponding to each of the multiple sleeve joints 108. Therefore, the same number of grout discharge passages 118 as the number of sleeve joints 108 are provided. The opening of the grout discharge passage 118 on the top surface of the PC beam member 100A serves as an outlet 118a for confirming that the sleeve joint 108 has been filled with grout.

[0033] After the PC beam member 100, the PC joint portion 104, and the PC beam member 100A are installed as described above, grout filling work is carried out. First, joint formwork 120, 122 for sealing the joints 110, 114, respectively, is installed around the entire periphery of the joints 110, 114 (that is, all four sides of the PC beam members 100, 100A).

[0034] Next, grout is injected from injection port 116a into grout injection passage 116. The grout injected into grout injection passage 116 flows into joint 114 from inlet 116b, and while filling joint 114, flows from joint 114 through lower sheath opening 113a into sheath pipe 113, and flows inside sheath pipe 113 to the right in FIG. 2. Furthermore, when the level of the grout injected into joint 114 rises and reaches the height of upper sheath opening 113a, the grout also flows into upper sheath pipe 113 and flows inside sheath pipe 113 to the right in FIG. 2.

[0035] The grout that has flowed into the sheath pipe 113 fills the gaps around the beam main reinforcement 106, and when it reaches the sheath opening 113b, it flows into the joint 110 on the PC beam member 100A side. While filling the joint 110, the flowing grout flows into the sheath pipe 112 from the sheath opening 112a and flows inside the sheath pipe 112 to the right in FIG.

[0036] The grout that flows into the sheath pipe 112 fills the gaps around the beam main reinforcement 106, and when it reaches the other sheath opening 112b, it flows into the sleeve joint 108 from the rebar insertion port 108a. Once the flowing grout is filled into the sleeve joint 108, the grout flows out from the grout discharge port 108c into the grout discharge passage 118, and finally flows out from the outlet 118a.

[0037] Therefore, it can be confirmed that all of the sleeve fittings 108 have been filled with grout by the fact that grout has flowed out from the outlets 118a corresponding to all of the sleeve fittings 108. Furthermore, as described above, the grout is filled from the joint 114 into the sheath pipe 113, the joint 110, and the sheath pipe 112, and then into the sleeve fitting 108. Therefore, once it is confirmed that all of the sleeve fittings 108 have been filled with grout, it can be determined that the joints 114, the sheath pipe 113, the joint 110, and the sheath pipe 112 have also been filled. The timing at which the grout starts to flow out of the outlets 118a differs depending on the outlets 118a, but the outlets 118a from which the outflow of grout has been confirmed are successively and quickly sealed.

[0038] In this embodiment and in each embodiment described below, the grout injection port 108b of the sleeve joint 108 is sealed and not used, but it is also possible to provide a separate grout discharge passage connected to the grout injection port 108b and opening on the top surface of the PC beam member 100A, so that when grout is filled into the sleeve joint 108, grout also flows out from this grout discharge passage, thereby making it possible to more reliably confirm the grout filling.

[0039] Once it has been confirmed that the grout has been filled in this way, the injection of grout from the injection port 116a into the grout injection passage 116 is stopped, and the injection port 116a is sealed. Then, after a predetermined grout hardening time has elapsed, the joint forms 120, 122 are removed.

[0040] As a result, the main beam reinforcement 106 of the PC beam member 100 and the main beam reinforcement 106 of the PC beam member 100A are connected by the sleeve joint 108, the main beam reinforcement 106 in the sheath tubes 112, 113 are fixed by grout, and the PC beam member 100, the PC joint portion 104, and the PC beam member 100A are integrated through the grout in the joints 114, 110, thereby joining the PC beam member 100, the PC joint portion 104, and the PC beam member 100A.

[0041] As described above, according to this embodiment, grout is injected into the joint 114 through the grout injection passage 116, and further injected into each sleeve joint 108 through the sheath pipe 113, the joint 110, and the sheath pipe 112. That is, grout filling into the joint 114, the sheath pipe 113, the joint 110, the sheath pipe 112, and the sleeve joint 108 is performed in one continuous process. This reduces the construction time for grout filling compared to when grout filling into the joint 114, the sheath pipe 113, the joint 110, the sheath pipe 112, and the sleeve joint 108 is performed in separate processes, and allows the joining work of the PC beam member 100, the PC connection portion 104, and the PC beam member 100A to be performed efficiently.

[0042] Furthermore, the grout inlet 116b from the grout injection passage 116 to the joint 114 opens into the joint 114 at a position lower than the center position in the height direction of the PC beam member 100 (i.e., the height direction of the joint 114), so the grout is filled mainly from the bottom up in the joint 114. This makes it difficult for air to get mixed into the grout filled into the joint 114, improving the fillability of the grout.

[0043] Furthermore, when the sleeve joint is installed vertically, grout is reliably filled upward from the lower axial direction of the sleeve joint, but when the sleeve joint 108 is installed horizontally as in this embodiment, grout is filled from the lower radial direction of the sleeve joint 108. For this reason, it is expected that filling with grout will be more difficult than when the sleeve joint 108 is installed vertically, and it becomes more important to confirm that grout has been filled into the sleeve joint 108. In contrast, in this embodiment, by providing a grout discharge passage 118 in each of the multiple sleeve joints 108, it is possible to reliably confirm that grout has been filled into all of the sleeve joints 108 by checking that grout has flowed out from each outlet 118a.

[0044] In this embodiment, the grout injection passage 116 is provided in the PC beam member 100, but if no column of the upper floor is provided above the PC joint 104, the grout injection passage 116 may be provided in the PC joint 104 with both ends opening to the top surface of the PC joint 104 and the side surface on the left side in the drawing, and grout may be injected from the opening on the top surface. This also applies to the second to fourth embodiments shown in Figures 3 to 5 below.

[0045] In this embodiment and each embodiment described below, the opening positions of the inlet of the grout injection passage and the outlet of the grout discharge passage are not limited to the positions described in each embodiment, and may be on any surface other than the end face joined to another member. Also, the hoses constituting the grout injection passage and the grout discharge passage may protrude from the surface of the PC member to the outside, and their tips may serve as the inlet and outlet.

[0046] Other embodiments of the present invention will be described below. In each of the following embodiments, components similar to those in the first embodiment will be denoted by the same reference numerals, and descriptions thereof will be omitted or simplified.

[0047] 3 is a diagram showing a second embodiment of the present invention. In this embodiment, instead of the PC beam members 100, 100A in the first embodiment, PC beam members 200, 200A, which are half PC members with upper end bars 106a and the upper half of stirrups 107 exposed at the top, are used as joining objects.

[0048] In this embodiment, as in the first embodiment, the entire periphery of the joints 110, 114 between the end faces of the PC beam members 200A, 200 and the side surfaces of the PC connection portion 204 is sealed with joint formwork 120, 122, respectively, and grout is injected into the joints 114 through a grout injection passage 116 provided in the PC beam member 200. The injected grout flows from the joint 114 through the lower sheath pipe 113, into which the lower end reinforcement 106b of the PC connection portion 204 is inserted, into the joint 110, and further through the lower sheath pipe 112 into the sleeve joint 108 connecting the lower end reinforcement 106b. When the grout has flowed out of the outlets 118a of all the grout discharge passages 118, it is confirmed that all of the lower sleeve joints 108, sheath pipes 112, 113, and joints 110, 114 have been filled with grout.

[0049] In this embodiment, since there is no concrete in the PC beam members 200, 200A at the position of the upper end reinforcing bars 106a, the upper end reinforcing bars 106a on the PC beam member 200 side are inserted alone into the sheath pipe 113 of the PC joint portion 104 through the sheath opening 113a on the left side in the figure. Each upper sleeve joint 108 is held in the position of the upper end reinforcing bars 106a, for example, by temporarily fastening it to the stirrups 107, and the tip of the upper end reinforcing bars 106a that have passed through the sheath pipe 113 is inserted into the sleeve joint 108 through the rebar insertion opening 108a. In addition, the upper end reinforcing bars 106a on the PC beam member 200A side are inserted into the rebar insertion opening 108a on the opposite side of the sleeve joint 108.

[0050] Then, the periphery of the upper end reinforcement 106a at the reinforcing bar insertion ports 108a at both ends of the upper sleeve joint 108 is sealed with sealing material 109, and grout is injected through the grout injection port 108b. When the grout flows out from the grout discharge port 108c, it is confirmed that the grout filling into the upper sleeve joint 108 has been completed.

[0051] In addition, since the sheath openings 113a and 113b at both ends of the upper sheath tube 113 are exposed on both sides of the PC joint portion 104, grout is injected from one sheath opening 113a, and the completion of filling the sheath tube 113 with grout is confirmed when the grout flows out from the other sheath opening 113b.

[0052] As with the upper sheath tube 150 in the sixth embodiment shown in FIG. 7 below, openings may be provided near both ends of the side of the sheath tube 150, and two passages may be provided in the PC joint portion 104, one end of which is connected to each of the openings and the other end of which opens to the side of the PC joint portion 104. With the upper end reinforcement 106a at the sheath openings 113a and 113b of the sheath tube 113 sealed, grout may be injected into the sheath tube 113 from one passage and allowed to flow out from the other passage.

[0053] Fig. 4 is a diagram showing a third embodiment of the present invention. In this embodiment, the sheath tube 112 provided in the PC beam member 100A in the first embodiment shown in Fig. 2 is omitted, and the reinforcing bar insertion port 108a of the sleeve joint 108 is exposed at the end face of the PC beam member 100A. In other words, the reinforcing bar insertion port 108a of the sleeve joint 108 is the "insertion port through which the reinforcing bar is inserted" in the present invention. This embodiment is applicable to a case where the structural design allows for the placement of a sleeve joint 108 in the hinge region at the end of the PC beam member 100A.

[0054] As in the first embodiment, grout injected into the grout injection passage 116 from the injection port 116a flows into the joint 114 from the inlet 116b, passes through the sheath tube 113, and flows into the joint 110. In this embodiment, the grout flows directly from the joint 110 through the reinforcing bar insertion port 108a into the sleeve joint 108 and is filled therein.

[0055] In this embodiment, too, grout is filled into the joint 114, the sheath pipe 113, the joint 110, and the sleeve joint 108 continuously in one process, thereby shortening the construction time required for filling the grout and enabling the joining work of the PC beam member 100, the PC joint portion 104, and the PC beam member 100A to be carried out efficiently, while also achieving the same effects as in the first and second embodiments.

[0056] Fig. 5 is a diagram showing a fourth embodiment of the present invention. This embodiment is the third embodiment shown in Fig. 4, except that PC beam members 200, 200A made of half PC are joined instead of the PC beam member 100A, as in the second embodiment shown in Fig. 3.

[0057] In this embodiment, the entire periphery of joints 110, 114 between the end faces of PC beam members 200A, 200 and the side surfaces of PC connection portions 204 is sealed with joint formwork 120, 122, respectively, and grout is injected into joints 114 through grout injection passages 116 provided in PC beam member 200. The injected grout flows from joint 114 through lower sheath pipe 113 into joint 110, and from joint 110 into lower sleeve joint 108, thereby filling joint 114, lower sheath pipe 113, and sleeve joint 108. When grout has flowed out of outlets 118a of all grout discharge passages 118, it is confirmed that all lower sleeve joints 108, sheath pipes 113, and joints 110, 114 have been filled with grout.

[0058] For each upper sleeve joint 108, as in the second embodiment shown in Figure 3, the periphery of the upper end reinforcement 106a at the reinforcing bar insertion ports 108a at both ends is sealed with sealing material 109, and grout is injected from the grout injection port 108b and allowed to flow out from the grout discharge port 108c, thereby filling the sleeve joint 108 with grout.

[0059] The upper sheath tube 113 is provided with an injection port 113c and a discharge port 113d near both ends of its side, and flow paths 140, 142 are provided inside the PC joint 104, one end of which is connected to the injection port 113c and the discharge port 113d, respectively, and the other end of which opens to the side of the PC joint 104. Then, with the periphery of the upper end reinforcement 106a sealed with sealing materials 130, 132 at the sheath openings 113a, 113b at both ends of the sheath tube 113, grout is injected from the flow path 140 into the sheath tube 113 via the injection port 113c and then allowed to flow out of the flow path 142 through the discharge port 113d, thereby filling and checking the grout into the upper sheath tube 113.

[0060] Fig. 6 is a diagram showing a fifth embodiment of the present invention. As shown in Fig. 6, in this embodiment, a PC beam member 100A is joined only to one side (the right side in the figure) of a PC joint portion 104.

[0061] A sheath pipe 150 for inserting the beam main reinforcement 106 penetrates laterally inside the PC connection 104. A recess 152 is provided on the side of the PC connection 104 on the side where the PC beam member 100A is not joined (the left side in the figure). A sheath opening 150a on the left side of the sheath pipe 150 in the figure is exposed at the bottom surface of the recess 152, and a sheath opening 150b on the right side is exposed at the right side surface of the PC connection 104 in the figure.

[0062] An outlet 150c is provided near the sheath opening 150a on the side of the sheath pipe 150. A grout discharge passage 156 is provided inside the PC joint 104. One end of the grout discharge passage 156 is connected to the outlet 150c, and the other end opens to the surface (top or side) of the PC joint 104. The opening of the grout discharge passage 156 on the surface of the PC joint 104 serves as an outlet 156a for confirming that the sheath pipe 150 has been filled with grout. The same number of grout discharge passages 156 as the number of sheath pipes 150 are provided, corresponding to each sheath pipe 150.

[0063] As explained in the first embodiment shown in Fig. 2, the sheath opening 112a of the sheath tube 112 is exposed at the end face of the PC beam member 100A, and the location where this sheath opening 112a is exposed corresponds to the "insertion opening through which the reinforcing bar is inserted" in the present invention. In addition, a sleeve joint 108 is provided continuous with the sheath opening 112b at the other end of the sheath tube 112.

[0064] In this embodiment, a grout injection passage 160 is provided inside the PC beam member 100A. One end of the grout injection passage 160 opens as an injection port 160a on the top surface of the PC beam member 100A, and the other end opens as an inlet 160b on the end surface of the PC beam member 100A. The grout injection passage 160 may be provided in the PC joint 104, or may be provided in both the PC beam member 100A and the PC joint 104. This also applies to the sixth to tenth embodiments shown in Figures 7 to 11 below.

[0065] When joining the PC joint portion 104 and the PC beam member 100A, first, the PC beam member 100A is erected so that a joint 110 is formed between the side of the PC joint portion 104 and the end face of the PC beam member 100A, and the positions of the sheath opening 150b of the PC joint portion 104 and the sheath opening 112a of the PC beam member 100A are aligned.

[0066] Next, the beam main reinforcement 106A is inserted from the sheath opening 150a of the PC joint 104 to the right in the figure, passing through the sheath tube 150, and further through the sheath tube 112 of the PC beam member 100A, until its tip reaches the sleeve joint 108. Then, the left end in the figure of the beam main reinforcement 106A is fixed to the bottom surface of the recess 152 by the fixing member 154, and the periphery of the beam main reinforcement 106A is sealed.

[0067] Next, joint formwork 120 is installed around the entire periphery of joint 110 to seal joint 110, and grout is then injected into grout injection passage 160 through injection port 160a. The injected grout flows into joint 110 through inlet 160b, and while filling joint 110, flows into sheath pipe 150 below PC connection portion 104 and into sheath pipe 112 below PC beam member 100A. When the grout level in joint 110 reaches the height of sheath openings 112a, 150a of sheath pipes 112, 150, it also flows into the lower sheath pipes 150, 112.

[0068] When the grout that has flowed into the sheath pipes 150 of the PC joint portion 104 is filled into the sheath pipes 150, the grout flows out from the outlets 156a through the grout discharge passages 156. When the grout has flowed out from the outlets 156a corresponding to all the sheath pipes 150, it can be confirmed that all the sheath pipes 150 have been filled with grout.

[0069] Furthermore, the grout that has flowed from the joint 110 into the sheath pipe 112 of the PC beam member 100A flows to the right in the figure while filling the sheath pipe 112, reaches the sleeve joint 108, and flows into the sleeve joint 108. When the inside of the sleeve joint 108 is filled with grout, the grout passes through the grout discharge passage 118 and flows out from the outlet 118a to the outside. When grout has flowed out from the outlets 118a corresponding to all of the sleeve joints 108, it can be confirmed that all of the sleeve joints 108 and sheath pipes 112 have been filled with grout. When grout has flowed out from all of the outlets 156a and outlets 1118a, it can be confirmed that the joint 110 has been filled with grout. The timing at which the grout starts to flow out of the outlets 156a, 118a differs depending on the outlet 156a, 118a, but the outlets 156a, 118a from which the outflow of grout has been confirmed are sealed in order and quickly.

[0070] Once it has been confirmed that all of the sheath pipes 150, 112, sleeve joints 108, and joints 110 have been filled with grout, the injection of grout from the injection port 160a into the grout injection passage 160 is stopped, and the injection port 160a is sealed. Then, after a predetermined grout hardening time has elapsed, the joint formwork 120 is removed.

[0071] As a result, the beam main reinforcement 106A inserted from the PC joint portion 104 side and the beam main reinforcement 106 provided in the PC beam member 100A are connected by the sleeve joint 108, and the beam main reinforcement 106A is fixed in the sheath tubes 150, 112 by grout, and the PC joint portion 104 and the PC beam member 104A are integrated through the grout in the joint 110, thereby joining the PC joint portion 104 and the PC beam member 100A. The recess 152 of the PC joint 104 is filled with grout at an appropriate timing during the joining work.

[0072] Fig. 7 is a diagram showing a sixth embodiment of the present invention, in which a PC beam member 200A made of half PC is used as the joining object instead of the PC beam member 100A in the fifth embodiment shown in Fig. 6.

[0073] 6, in this embodiment, outlets 150c are provided near the sheath openings 150a on the sides of the upper and lower sheath pipes 150, and a grout discharge passage 156 is provided inside the PC joint 104, one end of which is connected to the outlet 150c and the other end of which opens as an outlet 156a on the side of the PC joint 104. In this embodiment, in addition to this, an inlet 150d is provided near the sheath opening 150b on the side of the upper sheath pipe 150, and a grout inlet passage 158 is provided inside the PC joint 104, one end of which is connected to the inlet 150d and the other end of which opens as an inlet 158a on the side of the PC joint 104.

[0074] Then, the PC beam member 200A is erected so that a joint 110 is formed between the side of the PC joint portion 104 and the end face of the PC beam member 200A, and the lower main beam reinforcement 106A is inserted from the lower sheath opening 150a of the PC joint portion 104 through the sheath tube 150 and the sheath tube 112 of the PC beam member 200A until its tip reaches the sleeve joint 108. For the upper beam main reinforcement 106A, since there is no corresponding upper sheath tube 112 in the PC beam member 200A, the sheath tube 150 is inserted through the sheath opening 150a, the sheath tube 150, and the sheath tube 112 of the PC beam member 200A, until the tip reaches the sleeve joint 108.

[0075] To fill the grout, the entire periphery of the joint 110 is sealed with a joint formwork 120, and grout is injected into the joint 110 through a grout injection passage 160 provided in the PC beam member 200A. The injected grout flows from the joint 110 into the sheath pipe 150 below the PC connection portion 204 and the sheath pipe 112 below the PC beam member 200A, and from the sheath pipe 112 into the sleeve joint 108. When the grout flows out of the outlets 156a, 118a of the grout discharge passages 156, 118, it is confirmed that the lower sheath pipes 150, 112, the lower sleeve joints 108, and the joint 110 have been filled with grout.

[0076] For each upper sheath tube 150, the beam main reinforcement 106A is sealed around with a sealing material 162 at the sheath opening 150b on the right side of the figure, and the beam main reinforcement 106 is fixed with a fixing member 154 and its periphery is sealed at the sheath opening 150a on the left side of the figure. Then, grout is injected from the inlet 158a of the grout inlet passage 158 to fill the sheath tube 50 with grout, and when the grout flows out from the outlet 156a of the grout discharge passage 156, it is confirmed that the upper sheath tube 150 has been filled with grout.

[0077] Figure 8 is a diagram showing a seventh embodiment of the present invention. In this embodiment, the sheath tube 112 provided in the PC beam member 100A as in the third embodiment shown in Figure 4 in the fifth embodiment shown in Figure 6 is omitted, and the reinforcing bar insertion port 108a of the sleeve joint 108 is exposed at the end face of the PC beam member 100A. As with the third embodiment, this embodiment is for cases where structural design allows for the placement of the sleeve joint 108 in the hinge region at the end of the PC beam member 100A.

[0078] In this embodiment, grout injected into the grout injection passage 160 from the injection port 160a flows into the joint 110, flows from the joint 110 into the sheath tube 150 to fill it, and also flows directly into the sleeve joint 108 from the rebar insertion port 108a to fill it. In this way, in this embodiment, grout is filled continuously from the joint 110 to the sheath pipe 150 and sleeve joint 108 in one process, thereby shortening the construction time required for filling the grout and enabling the joining work of the PC joint portion 104 and the PC beam member 100A to be carried out efficiently.

[0079] Figure 9 is a diagram showing an eighth embodiment of the present invention. This embodiment is the seventh embodiment shown in Figure 8, and similarly to the fourth embodiment shown in Figure 5, the joining object is a PC beam member 200A made of half PC instead of the PC beam member 100A. The procedure for filling grout into the upper sleeve joint 108 and the upper sheath tube 150 is the same as in the second, fourth, and sixth embodiments (Figures 3, 5, and 7) in which the PC beam member 200A, which is half PC, is joined, so a description thereof will be omitted.

[0080] Fig. 10 is a diagram showing a ninth embodiment of the present invention. In this embodiment, the main beam reinforcement 106 is not inserted into the sheath pipe 150 provided in the PC joint 104 in the fifth embodiment shown in Fig. 6, but is protruded from the PC joint 104 during the fabrication of the PC column member 102.

[0081] In this embodiment, the PC beam member 100A is moved laterally from the side of the PC connection portion 104 so that the beam main reinforcement 106 is inserted into the sheath pipe 112, and is then erected so that a joint 110 is formed between the side surface of the PC connection portion 104 and the end face of the PC beam member 100A. The length of the beam main reinforcement 106 protruding from the PC connection portion 104 is set to a length such that the tip of the beam main reinforcement 106 reaches the inside of the sleeve joint 108 when the PC beam member 100A is erected. Then, as in the fifth embodiment shown in Figure 6, the grout is filled by injecting grout into the grout injection passage 160 from the injection port 160a with the joint formwork 120 sealed around the joint 110, allowing the grout to flow into the joint 110 from the inlet 160b, and from the joint 110 into the sheath tube 112 and further into the sleeve fitting 108. Completion of grout filling is confirmed when the grout flows out from the outlet 118a.

[0082] Fig. 11 is a diagram showing a tenth embodiment of the present invention. This embodiment is the same as the ninth embodiment shown in Fig. 10, except that a PC beam member 200A made of half PC is used as the joining object instead of the PC beam member 100A. In this embodiment, there is no upper sheath tube 112, and the procedure for filling the upper sheath tube 150 with grout is the same as in the second, fourth, and sixth embodiments (Figs. 3, 5, and 7) in which the PC beam member 200A made of half PC is used as the joining object, so a description thereof will be omitted.

[0083] In the first to tenth embodiments described above, since the grout is filled into the sheath pipe that extends long in the horizontal direction, if the fluidity of the grout is too low, there is a risk that good grout filling properties will not be obtained. Therefore, in each of the above embodiments, grout with a relatively large flow value (for example, a flow value of 180 to 330 mm) is used. However, the flow value of the grout in the present invention is not limited to this.

[0084] Furthermore, in the above first to tenth embodiments, the cases where PC beam members are joined to both sides of a PC beam section (first to fourth embodiments) and the cases where a PC beam member is joined to one side of a PC joint section (fifth to tenth embodiments) have been described, but the objects to be joined according to the present invention are not limited to these, and can be applied to the case of joining a PC member with rebars protruding from the side to a PC member with a sleeve joint for connecting the rebars. For example, the present invention can also be applied to cases where the objects to be joined are PC floor members or PC wall members. [Explanation of symbols]

[0085] 100, 100A, 200, 200A PC beam members 102 PC pillar member 104, 204 PC joint 106 Main beam reinforcement 106a Upper end muscle 106b Lower end reinforcement 106A Beam main reinforcement 107 Stifles 108 Sleeve joint 108a Rebar insertion port 108b Grout injection port 108c Grout outlet 109 Sealing material 110, 114 joints 112, 113 Sheath tube 112a, 112b, 113a, 113b sheath opening 113c inlet 113d outlet 116 Grout injection passage 116a Inlet 116b Inlet 118 Grout discharge passage 118a Outlet 120, 122 Joint formwork 130, 132, 134 Sealing material 140, 142 flow path 150 Sheath tube 150a, 150b sheath opening 150c outlet 150d inlet 152 recess 154 Fixing member 156 Grout discharge passage 156a Outlet 158 Grout inlet passage 158a Inlet 160 Grout injection passage 160a inlet 160b Inlet

Claims

1. a first PC member having a first side surface from which a reinforcing bar protrudes laterally; a second PC member provided on a side of the first PC member, having a second side surface facing the first side surface, an insertion port for inserting the reinforcing bar provided on the second side surface, and provided with a sleeve joint having a reinforcing bar insertion port communicating with the insertion port; A method for joining PC members, comprising: At least one of the first PC member and the second PC member is provided with a sheath tube for inserting the reinforcing bar, An installation process of installing the first PC member and the second PC member so that a joint is formed between the first side surface and the second side surface and a tip of the reinforcing bar is inserted into the sleeve joint; a grout filling step of continuously filling the joint, the sheath pipe, and the sleeve joint with grout by injecting grout into the joint and allowing the grout to flow from the joint into the sheath pipe and the sleeve joint; A method for joining PC members comprising:

2. The joining method for PC members according to claim 1, the sheath tube is provided on both the first PC member and the second PC member, an opening at one end of a sheath tube provided in the second PC member is exposed through the insertion port provided in the second side surface, The sleeve joint is provided so that the reinforcing bar insertion port is connected to an opening at the other end of the sheath tube provided on the second PC member, The reinforcing bar is inserted into a sheath tube provided in the first PC member and protrudes from the sheath tube, In the installation step, the first PC member and the second PC member are installed so that the reinforcing bar penetrates a sheath tube provided in the second PC member and the tip is inserted into the sleeve joint. Method for joining PC components.

3. The joining method for PC members according to claim 2, a method for joining the first PC member and the second PC member together, the method comprising: joining a third PC member provided on an opposite side to the side to which the second PC member is joined, the third PC member having a third side surface facing a side surface of the first PC member opposite to the first side surface; the sheath tube provided in the first PC member laterally penetrates the first PC member, and openings at both ends are exposed to the first side surface and the opposite side surface; The reinforcing bars protruding from the first side surface of the first PC member are reinforcing bars protruding laterally from the third side surface of the third PC member, passing through a sheath tube provided in the first PC member and protruding from the first side surface, In the installation step, the first PC member, the second PC member, and the third PC member are installed so that a first joint is formed between the first side surface and the second side surface, a second joint is formed between the third side surface and the opposite side surface of the first PC member, and a reinforcing bar protruding from the third PC member penetrates a sheath tube provided in the first PC member and further penetrates a sheath tube provided in the second PC member, and a tip is inserted into the sleeve joint, In the grout filling step, grout is injected into the second joint, flows from the second joint through a sheath pipe provided in the first PC member into the first joint, flows from the first joint into a sheath pipe provided in the second PC member, and further flows into the sleeve joint. Thus, grout is continuously injected into the second joint, the sheath pipe provided in the first PC member, the first joint, the sheath pipe provided in the second PC member, and the sleeve joint. Method for joining PC components.

4. The joining method for PC members according to claim 2, The reinforcing bar protruding from the first side surface of the first PC member penetrates a sheath tube provided in the first PC member and protrudes from the first side surface from the side of the first PC member opposite to the side to which the second PC member is joined, In the grout filling step, grout is injected into the joint, flows from the joint into the sheath pipe provided on the first PC member, and flows into the sleeve joint. By doing so, grout is continuously injected into the joint, the sheath pipe provided on the first PC member, and the sleeve joint. Method for joining PC components.

5. The joining method for PC members according to claim 1, The sheath tube is provided only on the first PC member, and the reinforcing bar insertion port of the sleeve joint is exposed to the insertion port of the second PC member, In the grout filling step, grout is poured into the sleeve joint through the reinforcing bar insertion port exposed in the joint. Method for joining PC components.

6. The joining method for PC members according to claim 5, a method for joining the first PC member and the second PC member together, the method comprising: joining a third PC member to the first PC member; the third PC member being provided on an opposite side of the first PC member to the side to which the second PC member is joined, the third PC member having a third side surface facing a side surface of the first PC member opposite to the first side surface; the sheath tube provided in the first PC member laterally penetrates the first PC member, and openings at both ends are exposed to the first side surface and the opposite side surface; The reinforcing bars protruding from the first side surface of the first PC member are reinforcing bars protruding laterally from the third side surface of the third PC member, passing through a sheath tube provided in the first PC member and protruding from the first side surface, In the installation step, the first PC member, the second PC member, and the third PC member are installed so that a first joint is formed between the first side surface and the second side surface, a second joint is formed between the third side surface and the opposite side surface of the first PC member, and a reinforcing bar protruding from the third PC member passes through a sheath tube provided in the first PC member and has a tip inserted into the sleeve joint, In the grout filling step, grout is injected into the second joint, flows from the second joint through a sheath pipe provided in the first PC member into the first joint, and flows from the first joint into the sleeve joint. By doing so, grout is continuously injected into the second joint, the sheath pipe provided in the first PC member, the first joint, and the sleeve joint. Method for joining PC components.

7. The joining method for PC members according to claim 5, The reinforcing bar protruding from the first side surface of the first PC member is inserted into a sheath tube provided in the first PC member and protrudes from the first side surface, In the grout filling step, grout is injected into the joint, flows from the joint into the sheath pipe provided on the first PC member, and flows into the sleeve joint. By doing so, grout is continuously injected into the joint, the sheath pipe provided on the first PC member, and the sleeve joint. Method for joining PC components.

8. The joining method for PC members according to claim 1, the sheath tube is provided only in the second PC member, and an opening at one end of the sheath tube is exposed to the insertion opening of the second PC member; The sleeve joint is provided so that the reinforcing bar insertion port is connected to an opening at the other end of the sheath tube provided on the second PC member, The reinforcing bar is embedded in the first PC member in advance and protrudes from the first side surface, In the installation step, the first PC member and the second PC member are installed so that the reinforcing bar penetrates a sheath tube provided in the second PC member and the tip is inserted into the sleeve joint. Method for joining PC components.

9. A method for joining PC members according to any one of claims 1 to 8, wherein the first PC member constitutes a PC joint portion and the second PC member constitutes a PC beam portion.

10. The joining method for PC members according to claim 3 or 6, a grout injection passage is formed in at least one of the first and third PC members, the grout injection passage having one end opening to a side surface of the first and third PC members that faces each other and the other end opening to a surface other than the facing side surface of the at least one PC member or to the outside of the at least one PC member; In the grout filling step, grout is injected into the second joint through the grout injection passage. Method for joining PC components.

11. The method for joining PC members according to claim 4, 7, or 8, a grout injection passage is formed in at least one of the first and second PC members, the grout injection passage having one end opening to the first side surface or the second side surface and the other end opening to a surface other than the first side surface or the second side surface of the at least one PC member or to the outside of the at least one PC member; In the grout filling step, grout is injected into the joint through the grout injection passage. Method for joining PC components.

12. The joining method for PC members according to claim 10, The grout injection passage opens to the side surface at a position lower than the center of the second joint in the height direction. Method for joining PC components.

13. The joining method for PC members according to claim 11, The grout injection passage opens to the first or second side surface at a position lower than the center of the joint in the height direction. Method for joining PC components.

14. A joint structure of PC members obtained by joining PC members using the method according to any one of claims 1 to 8.

15. a first PC member having a first side surface from which a reinforcing bar protrudes laterally; a second PC member provided on a side of the first PC member, facing the first side, having a second side surface that forms a joint between the first side surface and the second side surface, an insertion port through which the reinforcing bar is inserted provided on the second side surface, and provided with a sleeve joint having a reinforcing bar insertion port that communicates with the insertion port; 1. A method for filling grout in a joint comprising: A sheath tube through which the reinforcing bar is inserted is provided on at least one of the first PC member and the second PC member, Grout is injected into the joint, and the grout is allowed to flow from the joint into the sheath pipe and the sleeve joint, thereby continuously filling the joint, the sheath pipe, and the sleeve joint with grout. Grout filling method.

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