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 embedded with a plurality of sleeve couplings and has a second lateral face from which a reinforcement insertion port for inserting the reinforcement into the sleeve couplings is exposed, at the first lateral face and the second lateral face. The PC member joining method comprises: an installation step to install the first PC member and the second PC member so that the reinforcement is inserted in the sleeve couplings from the reinforcement insertion port and joint is formed between the first lateral face and the second lateral face; and a grout filling step to continuously fill grout in the joint and the plurality of sleeve couplings by injecting the grout in any one of the plurality of sleeve couplings so as to make the grout flow from the one sleeve coupling to the joint.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 joining precast concrete (PC) members. As shown in Figure 1, the construction method disclosed in Patent Document 1 uses a PC member 100. The PC member 100 is integrally formed with a PC joint 102 installed on a PC column member 101 of the lower floor and PC beam members 104a, 104b extending on both sides from the PC joint 102. One end of a main beam reinforcement 106 protrudes from the end face of one PC beam member 104a, and a reinforcing bar insertion port 108a of a sleeve joint 108 to which the other end of the main beam reinforcement 106 is connected is exposed at the end face of the other PC beam member 104b.

[0003] Then, by moving the PC member 100 laterally toward the installed PC member 100A, the PC joint portion 102 is positioned above the PC column member 101, and the main beam reinforcement 106 protruding from the PC beam portion 104a is inserted into the sleeve joint 108 of the PC beam portion 104b of the PC member 100A. After that, the sleeve joint 108 is filled with grout, and the joint 110 between the end face of the PC beam portion 104a of the PC member 100 and the end face of the PC beam portion 104b of the PC member 100A is also filled with grout, thereby joining the PC members 100 and 100A.

[0004] FIG. 1 also shows a joint 110 between the end face of the PC beam portion 104b of the PC member 100B, which was erected prior to the PC member 100A, and the end face of the PC beam portion 104a of the PC member 100A. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 3837390 Summary of the Invention [Problem to be solved by the invention]

[0006] When joining a PC member with rebar protruding from its side (the end face of PC beam portion 104a in the above construction method) and a PC member with a sleeve joint exposed on its side (the end face of PC beam portion 104b in the above construction method) by inserting the rebar into the sleeve joint with their sides facing each other, as in the above construction method, it is necessary to fill the joints between the sides of the two PC members and the sleeve joint with grout. If this grout filling is performed in separate processes, there is a problem that the number of steps required for grout filling increases and construction efficiency decreases.

[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 with grout. [Means for solving the problem]

[0008] In order to achieve this object, the present invention provides a method for joining PC members, which joins a first PC member having a first side surface from which reinforcing bars protrude laterally, and a second PC member provided on the side of the first PC member, having a plurality of sleeve joints embedded therein and having a reinforcing bar insertion port exposed for inserting the reinforcing bars into the sleeve joint, at the first side surface and the second side surface, and comprises an installation step of installing the first PC member and the second PC member so that the reinforcing bars are inserted into the sleeve joint through the reinforcing bar insertion port to form a joint between the first side surface and the second side surface, and a grout filling step of injecting grout into one of the plurality of sleeve joints, flowing the grout from the one sleeve joint through the reinforcing bar insertion port into the joint, and flowing the grout from the joint into sleeve joints other than the one sleeve joint through the reinforcing bar insertion port, thereby filling the joint and the plurality of sleeve joints with grout continuously.

[0009] According to the present invention, grout is injected into a sleeve joint provided on the second PC member, and then flows from the sleeve joint into the joints, and then from the joints into each sleeve joint. This allows grout to be continuously filled into the joints and multiple sleeve joints, making it possible to efficiently fill grout when joining PC members.

[0010] In the present invention, a grout injection passage may be formed in the second PC member, one end of which is connected to the inside of one of the sleeve joints and the other end of which opens to a surface other than the side surface of the second PC member or to the outside of the PC member, and in the grout filling process, grout may be injected into one of the sleeve joints through the grout injection passage.

[0011] In addition, in the present invention, a plurality of grout discharge passages may be formed in the second PC member, each of which is connected at one end to the interior of the plurality of sleeve joints and whose other ends open to a surface other than the side surface of the second PC member or to the outside of the second PC member, and it may be determined that all of the plurality of sleeve joints have been filled with grout when grout has flowed out from the openings of all of the plurality of grout discharge passages. In this way, by confirming that grout has flowed out from all of the multiple grout discharge passages, it is possible to reliably confirm that all of the sleeve joints have been filled with grout.

[0012] Furthermore, in the present invention, any one of the sleeve joints may be a sleeve joint located at a position lower than the center of the joint in the height direction, and if the multiple sleeve joints are located in multiple rows, the grout filling process may involve injecting grout into any one of the sleeve joints in the lowest row.

[0013] In this way, the grout flows into the joint from the lower sleeve joint, so that the grout flows upward from a low position inside the joint, filling it in. This prevents air from getting mixed into the grout, improving filling properties.

[0014] The PC member joining structure of the present invention is formed by joining the first PC member and the second PC member by the above-described PC member joining method.

[0015] In addition, the grout filling method of the present invention is a method for joining a first PC member having a first side surface from which reinforcing bars protrude laterally, and a second PC member provided on the side of the first PC member, having a second side surface in which a plurality of sleeve joints are embedded and in which reinforcing bar insertion ports for inserting the reinforcing bars into the sleeve joints, at the first side surface and the second side surface, in which grout is filled into the joints between the first side surface and the second side surface and into the sleeve joints, by injecting grout into one of the plurality of sleeve joints, allowing the grout to flow from the one sleeve joint through the reinforcing bar insertion port into the joint, and allowing the grout to flow from the joint into sleeve joints other than the one sleeve joint through the reinforcing bar insertion port, thereby filling the joints and the plurality of sleeve joints with grout continuously. [Effects of the Invention]

[0016] According to the present invention, grout filling can be carried out efficiently when joining PC members. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a diagram illustrating a conventional construction method for constructing a beam-column frame by joining PC members. [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. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the first embodiment, a case will be described in which a PC beam portion 104a of a PC member 100 is joined to a PC beam portion 104b of an adjacent PC member 100A in the above-mentioned Fig. 1. Note that the PC beam portions 104a, 104b are not limited to beam portions of a PC member in which a PC joint portion and a PC beam portion are integrated, such as the PC member 100, but may also be PC beam members that constitute only a beam.

[0019] As described above with reference to Figure 1, the main beam reinforcement 106 protrudes from the end face of the PC beam portion 104a of the PC member 100, and the reinforcing bar insertion port 108a of the sleeve joint 108 embedded in the PC beam portion 104b is exposed at the end face of the PC beam portion 104b.

[0020] To join PC beam portion 104a and PC beam portion 104b, first, from a state in which the end face of PC beam portion 104a faces the end face of PC beam portion 104b, PC member 100 is moved laterally toward PC member 100A as shown by arrow X in Figure 1. As a result, as shown in Figure 2 below, main beam reinforcement 106 protruding from the end face of PC beam portion 104a is inserted into sleeve joint 108 through rebar insertion port 108a exposed at the end face of PC beam portion 104b, and joint 110 is formed between the end face of PC beam portion 104a and the end face of PC beam portion 104b.

[0021] In this embodiment and each of the other embodiments described later, a PC beam is the object to be joined, and the "end face" of the PC beam corresponds to the "side face" of the present invention.

[0022] FIG. 2 is a diagram illustrating a method for joining PC members according to a first embodiment of the present invention, showing a cross section of a joint between PC beam portion 104a and PC beam portion 104b after a joint 110 has been formed. Note that in FIG. 2, PC beam portion 104a is shown on the right and PC beam portion 104b is shown on the left. Also, in FIG. 2, two beam main reinforcements 106, an upper end reinforcement 106a and a lower end reinforcement 106b, are shown, but multiple upper end reinforcements 106a and multiple lower end reinforcements 106b (for example, five) are provided in the beam width direction (depth direction on the page). Also, the upper end reinforcements 106a and the lower end reinforcements 106b may be provided in multiple rows (for example, two rows) above and below.

[0023] The sleeve joint 108 provided in the PC beam portion 104b is a substantially cylindrical member with reinforcing bar insertion openings 108a formed on both ends, and as described above, one end (the right end in FIG. 2) is exposed on the end surface of the PC beam portion 104b. The reinforcing bar insertion opening 108a on the other end has the beam main reinforcement 106 inserted into it inside the PC beam portion 104b, and the periphery of the beam main reinforcement 106 at the reinforcing bar insertion opening 108a on 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 member 100.

[0024] Two openings are provided near both ends of the side surface 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.

[0025] As shown in Figure 2, a grout injection passage 112 is provided inside the PC beam portion 104b. One end of the grout injection passage 112 is connected to the grout injection port 108b of one of the sleeve joints 108A and communicates with the interior of the sleeve joint 108A. The other end of the grout injection passage 112 opens to the top surface of the PC beam portion 104b and serves as an injection port 112a for injecting grout. Note that the grout injection ports 108b of the sleeve joints 108 other than the sleeve joint 108A are not used and are therefore sealed.

[0026] The grout injection passage 112 is formed by pouring concrete with a hose installed inside the formwork during the production of the PC member 100. Other passages provided inside the PC member in this embodiment and the following embodiments are formed in the same manner.

[0027] As described above, the sleeve joint 108A into which grout is injected from the grout injection passage 112 is any one of the multiple sleeve joints 108, and is preferably a sleeve joint 108 located lower than the center in the height direction of the PC beam portion 104b (i.e., the height direction of the joint 110), specifically, the lower sleeve joint 108 to which the lower end reinforcement 106b is connected as shown in Figure 2, and if the lower end reinforcement 106b is provided in two rows, upper and lower, it is more preferably the lower sleeve joint 108. Furthermore, of the multiple lower sleeve joints 108 lined up in the beam width direction, it is preferable that the central sleeve joint 108 in the beam width direction (either one of the two central sleeve joints 108 if an even number of sleeve joints are provided in the beam width direction) be used as the sleeve joint 108A.

[0028] Furthermore, a grout discharge passage 114 is provided inside the PC beam portion 104b. One end of the grout discharge passage 114 is connected to the grout discharge port 108c of the sleeve joint 108 and communicates with the interior of the sleeve joint 108. The other end of the grout discharge passage opens to the top surface of the PC beam portion 104b. The same number of grout discharge passages 114 as the number of sleeve joints 108 are provided to correspond to each of the multiple sleeve joints 108. The opening of the grout discharge passage 114 on the top surface of the PC beam portion 104b serves as an outlet 114a for confirming that the sleeve joint 108 has been filled with grout, as will be described later.

[0029] The inlet 112a of the grout injection passage 112 and the outlet 114a of the grout discharge passage 114 may open not only on the top surface of the PC beam portion 104a but also on the side surface, i.e., on any surface other than the end surface. Also, the hoses constituting the grout injection passage 112 and the grout discharge passage 114 may protrude outward from the surface of the PC beam portion 104a, with their tips serving as the inlet 112a and the outlet 114a.

[0030] When grouting to join the PC beam section 104a and the PC beam section 104b, as shown in FIG. 2, the beam main reinforcement 106 is inserted into the sleeve joint 108, and the PC beam sections 104a and 104b are installed so that a joint 110 is formed between the end face of the PC beam section 104a and the end face of the PC beam section 104b. Then, a joint formwork 116 is installed around the entire periphery of the joint 110 (all four sides of the PC beam sections 104a and 104b). Then, grout is injected into the grout injection passage 112 through the injection port 112a. The grout injected into the grout injection passage 112 fills the sleeve joint 108A through the grout injection port 108b and flows into the joint 110 through the rebar insertion port 108a.

[0031] The grout that flows into the joint 110 flows into the lower sleeve joints 108 other than the sleeve joint 108A through the rebar insertion port 108a while filling the joint 110, and when the level of the grout injected into the joint 110 rises and reaches the height of the upper sleeve joint 108, it also flows into the upper sleeve joint 108.

[0032] When grout flows into and fills the sleeve fittings 108, the grout flows out from the grout outlets 108c into the grout discharge passages 114, and finally flows out from the outlets 114a to the outside. Once the grout has flowed out from the outlets 114a corresponding to all the sleeve fittings 108, it can be confirmed that all the sleeve fittings 108 have been filled with grout. Furthermore, as described above, since grout flows into the sleeve fittings 108 from the joints 110, once it is confirmed that all the sleeve fittings 108 have been filled with grout, it can be determined that the joints 110 have also been filled. The timing at which the grout starts to flow out of the outlets 114a differs depending on the outlets 114a, but the outlets 114 from which the outflow of grout has been confirmed are sealed in order and quickly.

[0033] Once it has been confirmed that the grout has been filled into each sleeve joint 108 and the joint 110 in this manner, the injection of grout from the injection port 112a into the grout injection passage 112 is stopped, and the injection port 112a is sealed. Then, after a predetermined grout hardening time has elapsed, the joint form 116 is removed.

[0034] As a result, the main beam reinforcement 106 of the PC beam portion 104a and the main beam reinforcement 106 of the PC beam portion 104b are connected via the sleeve joint 108, and the PC beam portion 104a and the PC beam portion 104b are integrated via the grout in the joint 110, thereby joining the PC beam portion 104a and the PC beam portion 104b.

[0035] As described above, according to this embodiment, grout is filled into the joint 110 from the grout injection passage 112 through one sleeve joint 108A, and then further filled into each of the other sleeve joints 108 through the joints 110. In other words, filling of grout into the joint 110 and filling of grout into each sleeve joint 108 are carried out in one continuous process. This reduces the construction time for grout filling compared to when filling of grout into the joint 110 and each sleeve joint 108 is carried out in separate processes, and allows the joining work of the PC beam sections 104a, 104b to be carried out more efficiently.

[0036] Furthermore, since grout is filled from sleeve joint 108A through joint 110 into each sleeve joint 108, it is sufficient to provide grout injection passage 112 for injecting grout into the sleeve joint as a grout injection passage, and since there is no need to provide a grout injection passage corresponding to each sleeve joint 108, the number of passages can be significantly reduced.

[0037] Furthermore, by injecting grout from the grout injection passage 112 into the lower sleeve joint 108A, the grout flows into the joint 110 from its lower part through the reinforcing bar insertion port 108a of the sleeve joint 108A and flows upward within the joint 110. This prevents air from being mixed into the grout within the joint 110, thereby further improving the grout filling properties.

[0038] Furthermore, by injecting grout into the sleeve joint 108A at the center of the beam width, the grout fills the joint 110 while rising more uniformly in the beam width direction, thereby further shortening the time required to fill all of the sleeve joints 108.

[0039] 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 the sleeve joint 108 has been filled with grout. In contrast, in this embodiment, by providing a grout discharge passage 114 in each of the multiple sleeve joints 108, it is possible to reliably confirm that all of the sleeve joints 108 have been filled with grout by checking that grout flows out from each outlet 114a.

[0040] 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.

[0041] 3 is a diagram showing a second embodiment of the present invention. This embodiment differs from the first embodiment in that PC beams 204a and 204b, which correspond to PC beams 104a and 104b in the first embodiment, are configured as half PC beams with upper end bars 106a and the upper half of stirrups 107 exposed at the top.

[0042] In this embodiment, as in the first embodiment, the entire periphery of the joint 110 between the end faces of the PC beam portions 204a, 204b is sealed with a joint form 116, and grout is injected into one sleeve joint 108A from a grout injection passage 112 provided in the PC beam portion 204b. Further, the grout is caused to flow from the sleeve joint 108A into the joint 110, and the grout is injected into the other sleeve joint 108 through the joint 110. Then, when the grout flows out from the outlet 114a of the grout discharge passage 114, it is confirmed that the sleeve joints 108 and joints 110 have been filled with grout.

[0043] In addition, Figure 3 shows an example in which hoses for forming the grout injection passage 112 and the grout discharge passage 114 are extended from the PC beam portion 204b to the outside, and their ends are formed as the injection port 112a and the outflow port 114a, respectively, outside the PC beam portion 204b.

[0044] In addition, in this embodiment, the upper sleeve joint 108 connecting the upper end reinforcement 106a is entirely exposed, so for this sleeve joint 108, the periphery of the upper end reinforcement 106a at the rebar insertion ports 108a at both ends is sealed with sealing material 109, and then grout is filled in by injecting it from the grout injection port 108b and discharging it from the grout discharge port 108c.

[0045] Fig. 4 is a diagram showing a third embodiment of the present invention. As shown in Fig. 4, in this embodiment, a PC beam portion 140 is joined to a PC joint portion 142a of a PC column member 142. The PC beam portion 140 may be a PC beam member that constitutes only a beam, or may be a beam portion of a member in which the PC joint portion and the PC beam portion are integrated, such as the PC member 100 of the first embodiment.

[0046] One reinforcing bar insertion port 108a of the sleeve joint 108 is exposed at the end face of the PC beam section 140. The sleeve joints 108 are provided corresponding to the multiple beam main reinforcements 106, respectively. Inside the PC beam section 140, the beam main reinforcements 106 are inserted into each sleeve joint 108 through the other reinforcing bar insertion port 108a.

[0047] On the other hand, the PC joint portion 140a is provided with a reinforcing bar 144 that protrudes laterally from the side surface at a position corresponding to the main beam reinforcement 106 of the PC beam portion 140. In addition, a joint 150 is formed between the end face of the PC beam portion 140 and the side surface of the PC joint portion 142a.

[0048] A grout injection passage 146 is provided in the PC beam portion 140. One end of the grout injection passage 146 opens to the top surface of the PC beam portion 140, and the other end is connected to a grout injection port 108b of one of the sleeve joints 108A and communicates with the interior of the sleeve joint 108A. The opening of the grout injection passage 146 in the top surface of the PC beam portion 140 becomes an injection port 146a for injecting grout.

[0049] In this embodiment, grout is injected from the grout injection passage 146 into one sleeve joint 108A, and as in the first embodiment, this sleeve joint 108A is preferably a sleeve joint 108 located lower than the center of the height direction of the PC beam portion 140 (i.e., the height direction of the joint 150), and specifically, as shown in Figure 4, it is the lower sleeve joint 108 to which the lower end reinforcement 106b is connected, and if the lower end reinforcement 106b is provided in two rows, upper and lower, it is more preferably the lower sleeve joint 108, and further, it is the sleeve joint of the lower sleeve joint 108 at the center of the beam width direction.

[0050] Furthermore, a grout discharge passage 148 is provided inside the PC beam portion 140. One end of the grout discharge passage 148 is connected to the grout discharge port 108c of the sleeve joint 108 and communicates with the interior of the sleeve joint 108, and the other end opens to the top surface of the PC beam portion 140. The same number of grout discharge passages 148 are provided to correspond to all of the multiple sleeve joints 108. The opening of the grout discharge passage 148 on the top surface of the PC beam portion 104a serves as an outlet 148a for confirming that the sleeve joint 108 has been filled with grout.

[0051] In the above explanation, the grout injection passage 146 and the grout discharge passage 148 open to the top surface of the PC beam portion 104a to serve as the injection port 146a and the outlet 148a, but this is not limiting, and they may open to the side surface of the PC beam portion 140, or may open to a surface other than the end surface joined to the PC connection portion 142a. Also, the hoses that make up the grout injection passage 146 and the grout discharge passage 148 may protrude outward from the surface of the PC beam portion 104a, with their tips serving as the injection port 146a and the outlet 148a.

[0052] To join the PC beam portion 140 and the PC joint portion 142a, first, the PC beam portion 140 is moved laterally from a position where its end face faces the side of the PC joint portion 142a toward the PC joint portion 142a, so that the reinforcing bar 144 is inserted into the sleeve joint 108 and a joint 150 is formed between the side of the PC joint portion 142a and the end face of the PC beam portion 140.

[0053] Next, a joint form 152 for sealing the joint 150 is installed around the entire periphery of the joint 150 (all four sides of the PC beam portion 140). Then, grout is injected into the grout injection passage 146 from the injection port 146a.

[0054] The grout injected into the grout injection passage 146 flows into the sleeve joint 108A from its grout injection port 108b, and while being filled into the sleeve joint 108A, also flows into the joint 150 from the rebar insertion port 108a. While being filled into the joint 150, this grout flows into the lower sleeve joint 108 from the rebar insertion port 108a, and when the level of the grout injected into the joint 150 rises and reaches the height of the upper sleeve joint 108, it also flows into the upper sleeve joint 108 from the rebar insertion port 108a.

[0055] When grout flows into and fills each sleeve fitting 108, the grout flows out of the grout outlet 108c into the grout discharge passage 148, and finally flows out of the outlet 148a. Once the grout has flowed out of all the outlets 148a, it can be confirmed that all the sleeve fittings 108 have been filled with grout. Furthermore, as described above, since grout flows into the sleeve fittings 108 from the joints 150, once it is confirmed that all the sleeve fittings 108 have been filled with grout, it can be determined that the joints 150 have also been filled. The timing at which the grout starts to flow out of the outlets 114a differs depending on the outlets 114a, but the outlets 114 from which the outflow of grout has been confirmed are sealed in order and quickly.

[0056] Once it has been confirmed that the grout has been filled into each sleeve joint 108 and the joint 150 in this manner, the injection of grout from the injection port 146a into the grout injection passage 146 is stopped, and the injection port 146a and each outlet 148a are sealed. Then, after a predetermined grout hardening time has elapsed, the joint formwork 152 is removed.

[0057] As a result, the main beam reinforcement 106 of the PC beam portion 140 and the steel bar 144 protruding from the PC joint portion 142a are connected by the sleeve joint 108, and the PC beam portion 140 and the PC joint portion 142a are integrated through the grout in the joint 150, thereby completing the joining between the PC beam portion 140 and the PC joint portion 142a.

[0058] In the third embodiment described above, the same effects as in the first embodiment can be obtained. That is, by filling grout into joint 150 from sleeve joint 108A through grout injection passage 146, and then filling each sleeve joint 108 through joint 150, it is possible to fill grout into joint 150 and into sleeve joint 108 in one continuous process. This reduces construction time and makes it possible to efficiently join PC beam 140 and PC connection 142a compared to when filling grout into joint 150 and each sleeve joint 108 in separate processes.

[0059] Furthermore, by injecting grout from the grout injection passage 146 into the lower sleeve joint 108A and allowing the grout to flow into the joint 150 through this sleeve joint 108A, the grout is filled in the joint 150 from a low position upward, which makes it difficult for air to get mixed into the grout filled in the joint 150 and improves filling properties.

[0060] Furthermore, since the grout discharge passage 148 is provided in each of the plurality of sleeve joints 108, it is possible to confirm that all of the sleeve joints 108 have been filled with grout by seeing the grout flowing out from each outlet 148a.

[0061] Fig. 5 shows a fourth embodiment of the present invention. This embodiment differs from the third embodiment in that a PC beam 154, which corresponds to the PC beam 140 in the third embodiment, is configured as a half-PC beam with the upper end reinforcement 106a and stirrup reinforcement 107 exposed at the top. Fig. 5 also shows a case in which the hoses forming the grout injection passage 146 and the grout discharge passage 148 extend outside the PC beam 154, and the injection port 146a and the outflow port 148a open outside the PC beam 154.

[0062] In this embodiment, as in the third embodiment, grout is injected into the joint 150 from the grout injection passage 146, and then injected from the joint 150 into the sleeve joint 108, and when it flows out from the outlet 148a of the grout discharge passage 148, it can be confirmed that the grout has been filled into each sleeve joint 108.

[0063] Furthermore, since the upper sleeve joint 108 connecting the upper end reinforcement 106a is entirely exposed, the periphery of the upper end reinforcement 106a at the rebar insertion ports 108a at both ends of this sleeve joint 108 is sealed with sealing material 109, and grout is injected through the grout injection port 108b and allowed to flow out through the grout discharge port 108c to fill the sleeve joint.

[0064] As described above, in the first to fourth embodiments, the case of joining PC beams together (first and second embodiments) and the case of joining a PC beam to a PC column (joint) (second and fourth embodiments) has been described, but the present invention is not limited to this and can be applied to the case of joining one PC member with reinforcing bars protruding from the side to the other PC member with the reinforcing bar insertion port of the sleeve joint exposed on the side. For example, the present invention can also be applied to cases where PC floor members or PC wall members are to be joined. [Explanation of symbols]

[0065] 100 PC components 104a, 104b PC beam section 106 Main beam reinforcement 106a Upper end muscle 106b Lower end reinforcement 108 Sleeve joint 108a Rebar insertion port 108b Grout injection port 108c Grout outlet 110 Joint 112 Grout injection passage 112a Inlet 114 Grout discharge passage 114a Outlet 116 Joint formwork 120 Precast Concrete 130 Joint injection passage 140 PC beam section 142 PC pillar member 142a PC joint 144 Reinforced concrete 146 Grout injection passage 146a Inlet 148 Grout discharge passage 148a Outlet 150 joints 152 Joint formwork 154 PC beam section 204a, 204b PC beam section

Claims

1. A method for joining PC members, comprising: joining a first PC member having a first side surface from which reinforcing bars protrude laterally; and a second PC member provided on a side of the first PC member, having a plurality of sleeve joints embedded therein and having a second side surface from which reinforcing bar insertion ports for inserting the reinforcing bars into the sleeve joints are exposed, at the first side surface and the second side surface, An installation process in which the first PC member and the second PC member are installed so that the reinforcing bar is inserted into the sleeve joint through the reinforcing bar insertion port to form a joint between the first side surface and the second side surface; A grout filling process in which grout is injected into any one of the plurality of sleeve joints, the grout flows from the one sleeve joint through the reinforcing bar insertion port into the joint, and the grout flows from the joint into sleeve joints other than the one sleeve joint through the reinforcing bar insertion port, thereby continuously filling the joint and the plurality of sleeve joints with grout; A method for joining PC members comprising:

2. A grout injection passage is formed in the second PC member, the one end of the passage communicating with the inside of any one of the sleeve joints and the other end of the passage opening on a surface other than the side surface of the second PC member or on the outside of the second PC member, The method for joining PC members according to claim 1, wherein in the grout filling step, grout is injected into the one sleeve joint through the grout injection passage.

3. The second PC member is provided with a plurality of grout discharge passages each communicating with the interior of the plurality of sleeve joints at one end and opening at the other end to a surface other than the side surface of the second PC member or to the outside of the second PC member, 3. The method for joining PC members according to claim 1, wherein it is determined that all of the plurality of sleeve joints are filled with grout when grout has flowed out from all openings of the plurality of grout discharge passages.

4. The method for joining PC members according to any one of claims 1 to 3, wherein the one sleeve joint is a sleeve joint provided at a position lower than the center of the joint in the height direction.

5. The plurality of sleeve joints are provided in multiple vertical stages, The method for joining PC members according to claim 4, wherein in the grout filling step, grout is injected into one of the sleeve joints at the lowest level.

6. The method for joining PC members according to any one of claims 1 to 5, wherein the first PC member is a beam member or a beam-column joint member, and the second PC member is a beam member.

7. A PC member joint structure formed by joining the first PC member and the second PC member by the method according to any one of claims 1 to 6.

8. A method for joining a first PC member having a first side surface from which reinforcing bars protrude laterally and a second PC member provided on a side of the first PC member, having a plurality of sleeve joints embedded therein and having a second side surface from which reinforcing bar insertion ports for inserting the reinforcing bars into the sleeve joints are exposed, at the first side surface and the second side surface, the method comprising filling grout into joints between the first side surface and the second side surface, A grout filling method for continuously filling the joints and the plurality of sleeve joints with grout by injecting grout into any one of the plurality of sleeve joints, flowing the grout from the one of the sleeve joints into the joint through the reinforcing bar insertion port, and flowing the grout from the joint into sleeve joints other than the one of the sleeve joints through the reinforcing bar insertion port.

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