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 an 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 protruding from the first PC member is inserted in the sleeve couplings 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 the joint so as to make the grout flow from the joint to the plurality of sleeve couplings.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a PC member joining method and PC member joining structure in which PC members are joined by filling them with grout, 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 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 are exposed, at the first side surface and the second side surface, and comprises an installation process for installing the first PC member and the second PC member so that the reinforcing bars are inserted into the sleeve joints through the reinforcing bar insertion ports and joints are formed between the first side surface and the second side surface, and a grout filling process for injecting grout into the joints and allowing the grout to flow from the joints into the plurality of sleeve joints through the reinforcing bar insertion ports, thereby filling the joints and the plurality of sleeve joints with grout continuously.

[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 sleeve joint. This allows the joint and sleeve joint to be filled with grout continuously, allowing for efficient grout filling when joining the PC members.

[0010] In addition, in the present invention, a grout injection passage may be formed in at least one of the first PC member and the second PC member, with one end opening to the side surface of the at least one PC member and the other end opening to a surface other than the side surface of the at least one PC member or protruding from the surface, and in the grout filling process, grout may be injected into the joint through the grout injection passage.

[0011] In this case, the grout injection passage may open into the end surface at a position lower than the center of the joint in the height direction. In this way, the grout flows upward from a low position into the joint to fill it, thereby suppressing the inclusion of air in the grout and improving filling properties.

[0012] In addition, in the present invention, a plurality of grout discharge passages may be formed in the second PC member, one end of which is connected to the interior of each of the plurality of sleeve joints and the other end of which opens on a surface other than the side surface of the second PC member or on 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.

[0013] The present invention may further include a direct injection step of directly injecting grout into any one of the plurality of sleeve joints. In this way, in addition to injecting grout into the joint through the grout injection passage, grout can be injected directly into one sleeve joint, and grout can also flow into the joint from this sleeve joint, thereby further increasing the efficiency of grout filling.

[0014] In this case, any one of the sleeve joints may be a sleeve joint located at a position lower than the center of the joint in the vertical direction, and if the sleeves are located in multiple tiers, grout may be injected directly into the sleeve joint in the lowest tier.

[0015] In this way, the grout flows into the joint from the sleeve joint at a lower position where it was directly injected, and the grout flows upward from the lower position to fill the joint. This prevents air from getting mixed into the grout, and improves filling properties.

[0016] In this case, a joint injection passage may be formed in the second PC member, one end of which is connected to one of the sleeve joints of the plurality of sleeves and the other end of which opens to a surface other than the end face of the second PC member or to the outside of the second PC member, and in the direct injection process, grout may be injected into one of the sleeve joints through the joint injection passage.

[0017] In the present invention, the first PC member may be a PC beam member or a PC joint member, and the second PC member may be a PC beam member.

[0018] 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.

[0019] 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 multiple sleeve joints are embedded and in which insertion openings for inserting the reinforcing bars into the sleeve joints are exposed, in which the 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 the joints and allowing the grout to flow from the joints into the multiple sleeve joints, thereby filling the joints and the multiple sleeve joints with grout continuously. [Effects of the Invention]

[0020] According to the present invention, grout filling can be carried out efficiently when joining PC members. [Brief explanation of the drawings]

[0021] [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. [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. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the first embodiment of the present invention, 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.

[0023] 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 is exposed at the end face of the PC beam portion 104b.

[0024] 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.

[0025] In this embodiment and each of the other embodiments described later, a PC beam is used as the joining object, and the "end face" of the PC beam corresponds to the "side face" of the present invention.

[0026] 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.

[0027] As shown in Figure 2, the PC beam 104a is provided with a grout injection passage 112. Both ends of the grout injection passage 112 open to the top surface and end surface of the PC beam 104a, respectively. The opening of the grout injection passage 112 on the top surface of the PC beam 104a serves as an injection port 112a for injecting grout.

[0028] 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.

[0029] The injection port 112a of the grout injection passage 112 is not limited to being opened on the top surface of the PC beam portion 104a, but may be opened on the side surface, i.e., on any surface other than the end surface. Also, the hose constituting the grout injection passage 112 may be protruded to the outside from the surface of the PC beam portion 104a, and its tip may be used as the injection port 112a.

[0030] The opening of the grout injection passage 112 at the end face of the PC beam portion 104a becomes an inlet 112b through which grout flows from the grout injection passage 112 into the joint 110. The position of the inlet 112b of the grout injection passage 112 is preferably below the center in the height direction of the PC beam portion 104a (i.e., the height direction of the joint 110), and more preferably as low as possible within a range that does not structurally affect the bottom end reinforcement 106b.

[0031] 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 at 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.

[0032] 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 it is sealed to prevent concrete from flowing into the sleeve joint 108 during the production of the PC member 100.

[0033] The PC beam portion 104b is provided with a grout discharge passage 114. 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 114 opens to the upper surface of the PC beam portion 104b. The grout discharge passages 114 are provided in the same number as the sleeve joints 108, corresponding to each of the multiple sleeve joints 108.

[0034] As will be described later, 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 grout has been filled into the sleeve joint 108. The outlet 114a at one end of the grout discharge passage 114 is not limited to opening on the top surface of the PC beam portion 104a, and may also open on a side surface, i.e., any surface other than the end surface. Also, a hose constituting the grout discharge passage 114 may protrude outward from the surface of the PC beam portion 104b, with its tip serving as the outlet 114a.

[0035] 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) to seal the joint 110. Then, grout is injected into the grout injection passage 112 from the injection port 112a. The grout injected into the grout injection passage 112 flows into the joint 110 from the inlet 112b and, while filling the joint 110, flows into the lower sleeve joint 108 from the rebar insertion port 108a. 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 through the reinforcing bar insertion port 108a.

[0036] 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. Therefore, 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 114a from which the outflow of grout has been confirmed are sealed in order and quickly.

[0037] As described above, in this embodiment, the grout injection port 108b of the sleeve joint 108 is not used and is sealed, but it is also possible to provide a separate grout discharge passage connected to the grout injection port 108b so that when the sleeve joint 108 is filled with grout, the grout also flows out from this grout discharge passage, thereby making it possible to more reliably confirm that the sleeve joint 108 has been filled with grout.

[0038] Once it has been confirmed that the joints 110 and all of the sleeve joints 108 have been filled with grout, 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 formwork 116 is removed.

[0039] 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 by the sleeve joint 108, and the PC beam portion 104a and the PC beam portion 104b are integrated through the grout in the joint 110, thereby joining the PC beam portion 104a and the PC beam portion 104b.

[0040] As described above, in this embodiment, grout is injected into the joint 110 through the grout injection passage 112 to fill it, and is further injected into each sleeve joint 108 through the joint 110 to fill it. In other words, filling the joint 110 with grout and filling each sleeve joint 108 with grout are performed in one continuous process. This reduces the construction time required for grout filling compared to when filling the joint 110 and each sleeve joint 108 with grout is performed in separate processes, and allows the joining work of the PC beam sections 104a, 104b to be performed more efficiently.

[0041] Furthermore, since only the grout injection passage 112 is required as a passage for injecting grout into the joints 110 and the multiple sleeve joints 108, and there is no need to provide a grout injection passage for each sleeve joint 108, the number of passages can be significantly reduced.

[0042] Furthermore, if the grout inlet 112b from the grout injection passage 112 to the joint 110 is provided at a position lower than the center in the height direction of the PC beam portion 104a (i.e., the height direction of the joint 110), the grout will be filled upward from the lower position in the joint 110. This makes it difficult for air to get mixed into the filled grout, improving the filling properties 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 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.

[0044] In the above embodiment, the grout injection passage 112 is provided in the PC beam portion 104a from whose end face the main beam reinforcement 106 protrudes, but this is because, near the end face of the other PC beam portion 104b, multiple grout discharge passages 114 corresponding to each sleeve joint 108 are provided, and providing the grout injection passage 112 there could cause these passages to become entangled. However, if there is sufficient space near the end face of the PC beam portion 104b, the grout injection passage 112 may be provided in the PC beam portion 104b, or in both the PC beam portions 104a and 104b.

[0045] 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.

[0046] 3 is a diagram showing a second embodiment of the present invention. In this embodiment, PC beams 204a and 204b corresponding to the PC beams 104a and 104b in the first embodiment are configured as half PC beams in which the upper end bars 106a and the upper half of the stirrups 107 are exposed.

[0047] 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 formwork 116, and grout is injected into the joint 110 from a grout injection passage 112 provided in the PC beam portion 204a, and further into the sleeve joint 108 through the joint 110. Then, the grout flows out from the outlet 114a at the tip of the grout discharge passage 114, thereby confirming that each sleeve joint 108 has been filled with grout. 3 shows a case where the hose for forming the grout discharge passage 114 is extended from the PC member to the outside, with its tip serving as an outlet 114a. The grout injection passage 112 may also be similarly extended to the outside, with its tip serving as an injection port 112a.

[0048] 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.

[0049] 4 is a diagram showing a third embodiment of the present invention. This embodiment is similar to the first embodiment, except that a joint injection passage 130 is further provided in the PC beam portion 104b. One end of the joint injection passage 130 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 joint injection passage 130 opens to the top or side surface of the PC beam portion 104a or to the outside of the PC beam portion 104a, forming an injection port 130a for injecting grout.

[0050] In this embodiment, as in the first embodiment, grout is injected from the grout injection passage 112 into the joint 110 between the end faces of the PC beam sections 104a and 104b, and then injected into the sleeve joint 108 through the joint 110. In addition, grout is injected directly into the sleeve joint 108A from the injection port 130a through the joint injection passage 130 without passing through the joint 110.

[0051] As described above, the sleeve joint 108A into which grout is injected 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), 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. 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 (if an even number is provided, either one of the two central sleeve joints 108) is used as sleeve joint 108A.

[0052] The grout injected into the sleeve joint 108A from the joint injection passage 130 fills the sleeve joint 108A and flows into the joint 110 from the rebar insertion port 108a. This grout fills the joint 110 together with the grout that flows into the joint 110 from the inlet 112b of the grout injection passage 112, and then flows into the other sleeve joints 108 from their respective rebar insertion ports 108a to fill them. When the grout flows out from the outlets 114a provided corresponding to each sleeve joint 108, it can be confirmed that all of the sleeve joints 108 have been filled with grout.

[0053] In this embodiment, in addition to the same effects as in the first embodiment, the following additional effects can also be obtained. In other words, in this embodiment, grout is injected from both the grout injection passage 112 and the joint injection passage 130, so the amount of grout injected per hour is increased, and the grout filling work into the sleeve joint 108 and the joint 110 can be completed in a shorter time, further improving construction efficiency.

[0054] Furthermore, by injecting grout from the joint injection passage 130 into the lower sleeve joint 108A, the grout flows into the joint 110 from below through the reinforcing bar insertion port 108a of the sleeve joint 108A and flows upward from a low position within the joint 110. This, combined with the fact that the grout flowing in from the inlet 112b of the grout injection passage 112 flows upward within the joint 110, more reliably prevents air from being mixed into the grout within the joint 110, thereby further improving the grout filling performance. Furthermore, when grout is injected into the sleeve joint 108A at the center of the beam width direction, the grout fills the joint 110 while rising more uniformly in the beam width direction, thereby shortening the time required to fill all of the sleeve joints 108.

[0055] FIG. 5 is a diagram showing a fourth embodiment of the present invention. This embodiment is the third embodiment shown in FIG. 4, and, like the second embodiment shown in FIG. 3, it joins PC beams 204a and 204b made of half PC. In this embodiment, as in the fourth embodiment, grout is injected into the sleeve joint 108A from the joint injection passage 130, thereby shortening the time required to fill the sleeve joint 108 and the joint 110 with grout. Also, like the second embodiment, the upper sleeve joint 108 is exposed, so the grout is filled into this sleeve joint 108 by directly injecting grout into the grout inlet 108b and allowing it to flow out of the grout outlet 108c.

[0056] Fig. 6 is a diagram showing a fifth embodiment of the present invention. As shown in Fig. 6, 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.

[0057] 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, and the beam main reinforcements 106 are inserted into each sleeve joint 108 through the other reinforcing bar insertion port 108a inside the PC beam section 140.

[0058] 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.

[0059] 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 opens to the end surface. The opening of the grout injection passage 146 on the top surface of the PC beam portion 140 serves as an injection port 146a for injecting grout, and the opening on the end surface serves as an inlet 146b for grout into the joint 150. The position of the inlet 146a is preferably below the center in the height direction of the PC beam portion 140, and more preferably as low as possible within a range that does not structurally affect the bottom end reinforcement 106b.

[0060] Additionally, a grout discharge passage 148 is provided in 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 the other end opens to the top surface of the PC beam portion 140. Note that the grout injection port 108b of the sleeve joint 108 is not used and is therefore sealed.

[0061] The grout discharge passages 148 are provided in the same number as the sleeve joints 108, corresponding to all of the multiple sleeve joints 108. The openings of the grout discharge passages 148 on the top surface of the PC beam portion 104a serve as outlets 148a for confirming that the sleeve joints 108 have been filled with grout.

[0062] 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 as in the above embodiments, they may open to the side surface of the PC beam portion 140, that is, they may open to a surface other than the end surface joined to the PC connection portion 142a. Also, the hoses constituting the grout injection passage 146 and the grout discharge passage 148 may protrude to the outside from the surface of the PC beam portion 104a, with their tips serving as the injection port 146a and the outlet 148a.

[0063] 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.

[0064] 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.

[0065] The grout injected into the grout injection passage 146 flows into the joint 150 from the inlet 146b, and while filling the joint 150, flows into the lower sleeve joint 108 from the rebar insertion port 108a. 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.

[0066] 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 148a differs depending on the outlets 148a, but the outlets 148a from which the outflow of grout has been confirmed are sealed in order and quickly.

[0067] Once it has been confirmed that the joints 150 and all of the sleeve joints 108 have been filled with grout, the injection of grout from the injection port 146a into the grout injection passage 146 is stopped and the injection port 146a is sealed. After a predetermined grout hardening time has elapsed, the joint formwork 152 is removed.

[0068] 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 joining the PC beam portion 140 and the PC joint portion 142a.

[0069] The fifth embodiment described above also provides the same effects as the first embodiment. In other words, by injecting grout into the joint 150 through the grout injection passage 146 and then into each sleeve joint 108 through the joint 150, the grout filling into the joint 150 and the grout filling into the sleeve joint 108 can be carried out in one continuous process, which shortens construction time compared to when these grout injections are carried out in separate processes, and allows the joining work between the PC beam portion 140 and the PC joint portion 142a to be carried out more efficiently.

[0070] Furthermore, if the grout inlet 146b from the grout injection passage 146 to the joint 150 is located at a position lower than the center in the height direction of the PC beam portion 104a (i.e., the height direction of the joint 110), the grout will be filled upward from the lower position in the joint 150. This makes it difficult for air to get mixed into the grout filled in the joint 150, improving filling properties.

[0071] 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.

[0072] 7 shows a sixth embodiment of the present invention. This embodiment differs from the fifth embodiment in that the PC beam 154, which corresponds to the PC beam 140 in the fifth embodiment, is configured as a half PC beam with the upper end bars 106a and the upper parts of the stirrups 107 exposed at the top.

[0073] In this embodiment, as in the fifth 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 it is confirmed that the grout has been filled into each sleeve joint 108 by confirming that the grout has flowed out from the outlet 148a of the grout discharge passage 148.

[0074] 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 grout is filled by injecting it through the grout injection port 108b and discharging it through the grout discharge port 108c.

[0075] In the above fifth and sixth embodiments, the grout injection passage 146 is provided in the PC beam portion 140, but if a column of the upper floor is not installed above the PC joint portion 142a, the grout injection passage 146 may be provided in the PC joint portion 142a and the opening on the upper surface of the PC joint portion 142a may be used as the injection port 146a, or the grout injection passage 146 may be provided in both the PC joint portion 142a and the PC beam portion 140.

[0076] As described above, in the first to sixth embodiments, the cases of joining PC beams together (first to fourth embodiments) and joining a PC beam to a PC column (joint) (fifth and sixth embodiments) have been described, but the present invention is not limited to these and can be applied to joining one PC member with rebars protruding from the side to another PC member with a rebar insertion port of a sleeve joint exposed on the side. For example, the present invention can also be applied to joining PC floor members and PC wall members. [Explanation of symbols]

[0077] 100 PC components 104a, 104b PC beam section 106 Main beam reinforcement 106a Upper end muscle 106b Lower end reinforcement 107 Stifles 108 Sleeve joint 108a Rebar insertion port 108b Grout injection port 108c Grout outlet 110 Joint 112 Grout injection passage 112a Inlet 112b Inlet 114 Grout discharge passage 114a Outlet 116 Joint formwork 130 Joint injection passage 130a inlet 140 PC beam section 142 PC pillar member 142a PC joint 144 Reinforced concrete 146 Grout injection passage 146a Inlet 146b 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 of installing the first PC member and the second PC member so that the reinforcing bar is inserted into the sleeve joint through the reinforcing bar insertion port and a joint is formed between the first side surface and the second side surface; a grout filling step of continuously filling the joints and the plurality of sleeve joints with grout by injecting grout into the joints and allowing the grout to flow from the joints into the plurality of sleeve joints through the reinforcing bar insertion port; A method for joining PC members comprising:

2. a grout injection passage is formed in at least one of the first PC member and the second PC member, the grout injection passage having one end opening to the side surface of the at least one PC member and the other end opening to a surface other than the side surface of the at least one PC member or to the outside of the at least one PC member; The method for joining PC members according to claim 1 , wherein in the grout filling step, grout is injected into the joint through the grout injection passage.

3. The method for joining PC members according to claim 2, wherein the grout injection passage opens into the side surface at a position lower than the center of the joint in the height direction.

4. The second PC member is provided with a plurality of grout discharge passages, one end of which is connected to the interior of each of the plurality of sleeve joints and the other end of which is opened on a surface of the second PC member other than the side surface or on the outside of the second PC member; A method for joining PC members according to any one of claims 1 to 3, wherein it is determined that grout has been filled into all of the plurality of sleeve joints when grout has flowed out from all openings of the plurality of grout discharge passages.

5. The method for joining PC members according to any one of claims 1 to 4, further comprising a direct injection step of directly injecting grout into any one of the plurality of sleeve joints.

6. The method for joining PC members according to claim 5, wherein the any one sleeve joint is a sleeve joint provided at a position lower than the center of the joint in the height direction.

7. The plurality of sleeve joints are provided in multiple vertical stages, The method for joining PC members according to claim 6, wherein in the direct injection step, grout is directly injected into the sleeve joint at the lowest stage.

8. a joint injection passage is formed in the second PC member, the joint injection passage having one end connected to any one of the plurality of sleeves and the other end opening to a surface other than the end face of the second PC member or to the outside of the second PC member; The method for joining PC members according to any one of claims 5 to 7, wherein in the direct injection step, grout is injected into the one sleeve joint through the joint injection passage.

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

10. 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 8.

11. 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, the second side surface having a plurality of sleeve joints embedded therein and having an insertion port for inserting the reinforcing bars into the sleeve joints exposed, the method comprising filling grout into joints between the first side surface and the second side surface and into the sleeve joints, A grout filling method for continuously filling the joints and the plurality of sleeve joints with grout by injecting grout into the joints and allowing the grout to flow from the joints into the plurality of sleeve joints.

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