How to connect PCa components

Abstract

To provide a method for connecting a PCa member which can shorten a construction period by efficient grout injection.SOLUTION: A method for connecting a PCa member includes: an A1 step of projecting column main reinforcements 23 from an end face of a lower column 20A, wherein a PCa connection 10 has main reinforcement through holes 12, embedding joint pipes 25 inside from an end face of an upper column 20B, inserting the column main reinforcement 23 into the main reinforcement through holes 12 and the joint pipes 25, laminating the lower column 20A, the PCa connection 10 and the upper column 20B, and forming a gap 27 for a lower horizontal joint and a gap 28 for an upper horizontal joint; a B1 step of injecting a grout from an injection hose 40 installed in a through hole 15 for injection through the gap 28 for the upper horizontal joint, filling the gap 27 for the lower horizontal joint with the grout in a horizontal direction so as to raise each of the main reinforcement through holes 12, filling the gap 28 for the upper horizontal joint with the grout in the horizontal direction, and filling each of the joint pipes 25 with the grout; and a step C of forming a lower horizontal joint 31 and an upper horizontal joint 32, and connecting the PCa member.SELECTED DRAWING: Figure 4A

Description

[Technical field]

[0001] The present invention relates to a method for connecting PCa members. [Background technology]

[0002] For example, when constructing a column-beam joint between a reinforced concrete (RC) column and a beam, or a column-beam joint in a hybrid structure between an RC column and a steel (Steel) beam by pouring concrete on-site, the construction period is lengthened, which is even more pronounced in the case of high-rise buildings. In order to address this issue, a connection method is sometimes used in which the upper and lower columns and the joints connecting the two columns are both made of precast concrete (hereinafter referred to as "PCa"), and the PCa columns and PCa joints (both included in PCa members) are transported to the site, assembled, and integrated with minimal grout filling. This connection method for PCa members can significantly shorten the construction period, including for high-rise buildings, and since the column-beam joints are formed by PCa members, it is possible to construct buildings with high structural reliability.

[0003] Here, Patent Document 1 proposes a joint structure for PCa columns and beams (here, PC columns and beams), which is composed of a first PCa member (here, PC member) arranged so that a PCa joint (here, PC joint panel portion) is positioned on a PCa column (here, PC column) of a lower floor, a PCa beam portion (here, PC beam portion) and second and third PCa members arranged on both sides of the PCa joint, a beam main bar protrudes from the end of the PCa beam portion of the second PCa member, a joint for connecting the beam main bar is embedded in the end of the PCa beam portion of the third PCa member, and the beam main bar protruding from the second PCa member is inserted from one end of a through hole, and its tip protrudes from the other end of the through hole and is fixed to the joint of the third PCa member. In this joint structure, the joint is composed of a sheath pipe with a convex portion provided on the outer periphery, and the tip of the beam main bar is inserted into the inside of the sheath pipe and fixed by grout. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4496023 Summary of the Invention [Problem to be solved by the invention]

[0005] By the way, in the conventional method of connecting PCa members, for example, a PCa joint is installed on a lower column, which is a PCa column, and grout is injected into the main reinforcement through holes of the PCa joint and into the joint between the two (gap for lower horizontal joint), and then an upper column is installed on the PCa joint so that the main reinforcement of the column protruding from the upper end of the PCa joint is inserted into the joint pipe of the upper column, which is a PCa column, and grout is injected into the inside of the joint pipe and into the joint between the two (gap for upper horizontal joint). In this way, two grout injection steps are required, in which the upper and lower grout injection steps are completely separated. Therefore, for example, when a building has three or more floors, the above steps are repeated the number of times according to the number of floors, which increases the number of steps and negates the shortening of the construction period by adopting PCa members. In addition, the above Patent Document 1 does not disclose any means for solving this problem.

[0006] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a method for connecting PCa members, including at least PCa columns and PCa joints, which can shorten construction time by efficient grout injection. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the method for connecting PCa members according to the present invention is to A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; B1 process: A series of continuous filling is performed by injecting grout from an injection hose installed in one of the main reinforcement through holes or the injection through hole provided in the PCa joint through the upper horizontal joint gap or the lower horizontal joint gap, filling the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then filling each main reinforcement through hole so as to rise or fall, then filling the other of the lower horizontal joint gap or the upper horizontal joint gap horizontally, and then filling each joint pipe; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0008] According to this embodiment, in step B1, the gaps for the upper horizontal joints and the gaps for the lower horizontal joints, the main reinforcement through holes, and the joint pipes can be continuously filled with grout, so that efficient grout injection can be realized and the construction period can be shortened. Here, in step A1, since multiple main column reinforcements protrude from the end face of one of the lower and upper columns, which are PCa columns, multiple joint pipes through which the ends of each main column reinforcement are inserted are embedded in the other column from which the main column reinforcements do not protrude.

[0009] In the following, in this specification, a configuration in which the column main reinforcement protrudes from the end face (upper end face) of the lower column, a joint pipe is buried inside from the end face (lower end face) of the upper column, and the end of the column main reinforcement is inserted into this joint pipe is referred to as "forward insertion," and a configuration in which the column main reinforcement protrudes from the end face (lower end face) of the upper column, a joint pipe is buried inside from the end face (upper end face) of the lower column, and the end of the column main reinforcement is inserted into this joint pipe is referred to as "reverse insertion." Also, a PCa joint with multiple main reinforcement through holes can also be referred to as a "lotus root PCa joint."

[0010] In step B1, grout is injected from an injection hose installed in one of the main reinforcement through holes or the injection through hole provided in the PCa joint through the upper horizontal joint gap or the lower horizontal joint gap. For example, when grout is injected from an injection hose installed in the injection through hole through the upper horizontal joint gap, the injected grout enters the lower horizontal joint gap from the injection through hole, fills the lower horizontal joint gap horizontally, then fills each main reinforcement through hole so as to rise from the lower horizontal joint gap, then grout enters the upper horizontal joint gap from each main reinforcement through hole, fills the upper horizontal joint gap horizontally, and finally fills each joint pipe from the upper horizontal joint gap, so that a series of continuous filling of grout is performed.

[0011] Here, the method of maintaining the gaps for the upper horizontal joint and the lower horizontal joint includes a method of inserting a spacer of a specified height into both gaps, or a method of protruding a protrusion of a specified height from the lower end face of the upper column or the upper end face of the lower column so that a gap of the desired height is automatically formed when it abuts against the PCa joint. In addition, a band-shaped formwork is installed around the formed gaps for the upper horizontal joint and the lower horizontal joint to prevent the grout from leaking, and it is recommended to provide air vent holes in various places in the formwork. In addition, it is recommended to provide air vent holes in the joint pipe that lead from the joint pipe to the side of the PCa column.

[0012] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; B2 process: a series of continuous filling steps are performed in which the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap by injecting grout from an injection hose installed in one of the main reinforcement through holes or the injection through hole provided in the PCa joint through the upper horizontal joint gap or the lower horizontal joint gap, and then the grout is filled by raising or lowering each main reinforcement through hole; At least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe to fill the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then into each joint pipe, thereby performing a series of continuous filling steps; B3 step; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0013] According to this embodiment, in step B2, for example, grout is filled into the lower horizontal joint gap and each main reinforcement through hole, and by confirming that the grout enters the upper horizontal joint gap from each main reinforcement through hole, it is possible to ensure that the lower horizontal joint gap and each main reinforcement through hole are reliably filled with grout. Next, in step B3, for example, one joint pipe on the upper column is used as an injection joint pipe, and grout is injected through a joint injection hole connected to it, so that, for example, grout is filled horizontally in the upper horizontal joint gap, and then grout is filled into each joint pipe from the upper horizontal joint gap, so that grout can be continuously filled into the lower horizontal joint gap, the upper horizontal joint gap, each main reinforcement through hole, and each joint pipe.

[0014] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; B4 process of filling each joint pipe with grout through a joint injection hole communicating with each of the joint pipes; B5 process: A series of continuous filling is performed by injecting grout from an injection hose installed in one of the main reinforcement through holes or the injection through hole provided in the PCa joint through the upper horizontal joint gap or the lower horizontal joint gap, filling the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then filling each main reinforcement through hole so as to rise or fall, and then filling the other of the lower horizontal joint gap and the upper horizontal joint gap in the horizontal direction; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0015] According to this embodiment, in step B4, for example, grout is filled into each joint pipe through a joint injection hole communicating with each joint pipe buried in the lower column, and by confirming that the grout enters the lower horizontal joint gap from each joint pipe, it is possible to ensure that the grout has been reliably filled into each joint pipe. Next, in step B5, for example, grout is injected from an injection hose installed in an injection through hole through an upper horizontal joint gap, for example, so that the grout is filled horizontally in the lower horizontal joint gap, and then the grout is filled in each main reinforcement through hole so that it rises from the lower horizontal joint gap, and then the grout is filled horizontally from each main reinforcement through hole into the upper horizontal joint gap, so that the grout can be continuously filled.

[0016] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; A step B6 of performing a series of continuous filling, in which an injection hose is installed in the upper horizontal joint gap or the lower horizontal joint gap, or an injection hose is buried in either the lower column or the upper column, and grout is injected from the injection hose to fill each joint pipe first or last, and the grout is filled horizontally in either the lower horizontal joint gap or the upper horizontal joint gap where the injection hose is installed, and then each main reinforcement through hole is filled by raising or lowering it, and then the other of the lower horizontal joint gap and the upper horizontal joint gap is filled horizontally; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0017] According to this embodiment, in step B6, for example, by directly injecting grout into the gap for the lower horizontal joint, grout is filled into each joint pipe in the lower column from the gap for the lower horizontal joint, and grout is filled horizontally in the gap for the lower horizontal joint, and then grout is filled into each main reinforcement through hole from the gap for the lower horizontal joint so that the grout rises, and then grout is filled horizontally from each main reinforcement through hole into the gap for the upper horizontal joint, so that grout can be continuously filled. In this form, grout is filled into each joint pipe first. On the other hand, when the upper column has a joint pipe and grout is injected from the gap for the lower horizontal joint, grout is filled into each joint pipe last. Here, in step B6, for example, there is a form in which an injection hose is installed in the gap for the lower horizontal joint, and a form in which an injection hose is buried in the lower column in advance so as to communicate with the gap for the lower horizontal joint.

[0018] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; B4 process of filling each joint pipe with grout through a joint injection hole communicating with each of the joint pipes; B7 process, in which grout is injected from an injection hose installed in one of the main reinforcement through holes or the injection through hole provided in the PCa joint through the upper horizontal joint gap or the lower horizontal joint gap, the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then the grout is filled by raising or lowering each main reinforcement through hole, and then the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0019] According to this embodiment, in step B4, for example, grout is filled into each joint pipe through a joint injection hole communicating with each joint pipe buried in the lower column, and by confirming that the grout enters the lower horizontal joint gap from each joint pipe, it is possible to ensure that the grout has been reliably filled into each joint pipe. Next, in step B7, for example, grout injected into the injection through hole through the upper horizontal joint gap enters the lower horizontal joint gap from the injection through hole, is filled horizontally in the lower horizontal joint gap, and then is filled from the lower horizontal joint gap so as to rise through each main reinforcement through hole, and then grout enters the upper horizontal joint gap from each main reinforcement through hole, and the grout is filled horizontally in the upper horizontal joint gap, so that a series of continuous filling of grout is performed.

[0020] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint has a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process in which each of the plurality of column main reinforcements is passed through the corresponding main reinforcement through holes, and the end of the column main reinforcement protruding from the main reinforcement through holes is inserted into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; B8 process, in which grout is injected from an injection hose installed in the upper horizontal joint gap or the lower horizontal joint gap, or from an injection hose embedded in either the lower column or the upper column, to horizontally fill the grout into either the lower horizontal joint gap or the upper horizontal joint gap in which the injection hose is installed, and then fill each main reinforcement through hole by raising or lowering it, At least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe to fill the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then into each joint pipe, thereby performing a series of continuous filling steps; B3 step; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0021] According to this embodiment, in step B8, for example, by directly injecting grout into the gap for the lower horizontal joint, the gap for the lower horizontal joint is filled with grout in the horizontal direction, and then the grout is filled from the gap for the lower horizontal joint so as to rise through each main reinforcement through hole, and by confirming that the grout enters the gap for the upper horizontal joint from each main reinforcement through hole, it is possible to ensure that the gap for the lower horizontal joint and each main reinforcement through hole are filled with grout. Next, in step B3, for example, one joint pipe on the upper column is used as an injection joint pipe, and grout is injected through a joint injection hole connected to it, so that the gap for the upper horizontal joint is filled with grout in the horizontal direction, and then the other joint pipe is filled with grout from the gap for the upper horizontal joint, so that the gap for the lower horizontal joint, the gap for the upper horizontal joint, each main reinforcement through hole, and each joint pipe can be continuously filled with grout.

[0022] In addition, another aspect of the PCa member connection method according to the present invention is, In buildings with three or more floors, The A1 step is carried out on a predetermined number of floors among all floors, and then one or more of the B1 step to the B8 step and the C step are carried out; Next, on the remaining floors, the A1 step is carried out, and then any one or more of the B1 step to the B8 step and the C step are carried out.

[0023] According to this embodiment, in a building with three or more floors, the connection efficiency of the PCa members of all floors can be significantly improved. Here, "across a predetermined number of floors among all floors" means, for example, in a 10-story building, the predetermined number of floors can be the 1st to 5th floors, and the "remaining floors" can be the 6th to 10th floors, and there are various settings like this. In this example, the A1 step is performed on the 1st to 5th floors, and then one or more of the B1 to B8 steps and the C step are performed on the 1st to 5th floors, so that the PCa members of the 1st to 5th floors are efficiently connected. After that, the A1 step is performed on the 6th to 10th floors in the same manner, and then one or more of the B1 to B8 steps and the C step are performed, so that the PCa members of the 6th to 10th floors are efficiently connected, and as a result, it is possible to efficiently connect the PCa members of the 1st to 10th floors.

[0024] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from the upper and lower end faces of the PCa joint, A plurality of joint pipes through which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the end faces of the lower column and the upper column to the inside, A2 process in which the ends of the plurality of main column reinforcements are inserted into the corresponding joint pipes to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; In either one of the upper column and the lower column, at least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe, so that the grout is filled horizontally into either one of the lower horizontal joint gap and the upper horizontal joint gap, and then into each joint pipe, thereby performing a series of continuous filling; In either the upper column or the lower column, at least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe to fill the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then into each joint pipe, performing a series of continuous filling steps; B9 step; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0025] According to this embodiment, in step A2, instead of the lotus root PCa joint already described, a different type of PCa joint (for example, it can be called a full PCa joint) in which multiple main column reinforcements protrude above and below is applied, and an upper column and a lower column, both of which are equipped with joint pipes, are used to stack the PCa columns and PCa joints, and in step B9, grout is injected through the joint injection holes equipped on both the upper column and the lower column, so that the grout is filled horizontally into the lower horizontal joint gap and the upper horizontal joint gap, and then each joint pipe is filled with grout, so that the upper horizontal joint gap and each joint pipe connected to it, and the lower horizontal joint gap and each joint pipe connected to it can be continuously filled with grout.

[0026] In addition, another aspect of the PCa member connection method according to the present invention is, In the B9 step, two branch hoses of the injection hose are connected to the combined injection joint pipes of the upper column and the lower column, respectively, and grout is injected simultaneously.

[0027] According to this embodiment, by connecting the two branch hoses of the injection hose to the combined injection joint pipes of the upper and lower columns, respectively, grout can be injected simultaneously from the top and bottom, making it possible to fill the grout more efficiently.

[0028] In addition, another aspect of the PCa member connection method according to the present invention is, A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from the upper and lower end faces of the PCa joint, A plurality of joint pipes through which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the end faces of the lower column and the upper column to the inside, A2 process in which the ends of the plurality of main column reinforcements are inserted into the corresponding joint pipes to stack the lower column, the PCa joint, and the upper column, and at this time, a gap for a lower horizontal joint is formed between the lower column and the PCa joint, and a gap for an upper horizontal joint is formed between the PCa joint and the upper column; In the lower column, grout is filled into each joint pipe through a joint injection hole communicating with each joint pipe, and then the lower horizontal joint gap is filled horizontally. B10 process; In the upper column, at least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe to fill the grout horizontally into the upper horizontal joint gap, and then into each joint pipe, thereby performing a series of continuous filling steps; B11 step; The method is characterized by having a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

[0029] According to this embodiment, in step B10, grout is filled into each joint pipe through the joint injection holes communicating with each joint pipe in the lower column, and by confirming that the grout enters the lower horizontal joint gap from each joint pipe, it is possible to confirm that the grout has been securely filled into each joint pipe, and then the grout is filled horizontally into the lower horizontal joint gap.

[0030] In addition, another aspect of the PCa member connection method according to the present invention is, In buildings with three or more floors, The A2 step is carried out on a predetermined number of floors among all floors, and then one or more of the B9 step or the B11 step and the C step are carried out; Next, in the remaining floors, the step A2 is carried out, and then one or more of the step B9 or the step B11 and the step C are carried out.

[0031] According to this embodiment, the connection efficiency of PCa members on all floors of a building with three or more floors can be significantly improved. Effect of the Invention

[0032] As can be understood from the above explanation, according to the PCa member connection method of the present invention, for a PCa member connection method including at least a PCa column and a PCa joint, construction time can be shortened by efficient grout injection. [Brief description of the drawings]

[0033] [Figure 1A] This is a diagram showing a schematic diagram of PCa joints and PCa columns and column-beam joints on a 10-story building. [Figure 1B] FIG. 13 is a diagram for explaining an example of a method for connecting PCa members according to an embodiment, and is a diagram for explaining an assembly procedure by forward insertion using a lotus root PCa joint. [Figure 1C] FIG. 1C shows the state formed by the assembly procedure of FIG. 1B prior to grout injection. [Figure 1D] FIG. 1D is a view taken along the arrow DD in FIG. 1C. [Figure 2A] 13 is a diagram for explaining another example of a method for connecting PCa members according to an embodiment of the present invention, and is a diagram for explaining an assembly procedure by reverse insertion using a lotus root PCa joint. FIG. [Figure 2B] FIG. 2B shows the state formed by the assembly procedure of FIG. 2A prior to grout injection. [Figure 3A] 13 is a diagram for explaining yet another example of a method for connecting PCa members according to an embodiment of the present invention, and is a diagram for explaining an assembly procedure in which a full PCa joint is applied. FIG. [Figure 3B] FIG. 3B shows the state formed by the assembly procedure of FIG. 3A prior to grout injection. [Figure 3C] FIG. 3C is a view taken along the arrow CC in FIG. 3B. [Figure 4A] 4A to 4C are diagrams illustrating an example of a method for connecting PCa members according to the first embodiment. [Figure 4B] FIG. 4B is a view taken along the arrow BB in FIG. 4A. [Figure 5A] 13A to 13C are diagrams illustrating an example of a connection method for PCa members according to the second embodiment. [Figure 5B] FIG. 5B is a view taken along the arrow BB in FIG. 5A. [Figure 6A] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in the third embodiment. [Figure 6B] FIG. 6B is a view taken along the arrow BB in FIG. 6A. [Figure 7] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in accordance with the fourth embodiment. [Figure 8] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in the fifth embodiment. [Figure 9] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in accordance with the sixth embodiment. [Figure 10] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in the seventh embodiment. [Figure 11] 13A to 13C are diagrams illustrating an example of a connection method for PCa members according to the eighth embodiment. [Figure 12] 13A to 13C are diagrams illustrating an example of a connection method for PCa members in the ninth embodiment. [Figure 13] 13A to 13C are diagrams illustrating an example of a connection method for PCa members according to the tenth embodiment. [Figure 14] 13A to 13C are diagrams illustrating an example of a connection method for PCa members according to an 11th embodiment. [Figure 15] 12A to 12C are diagrams illustrating an example of a connection method for PCa members according to the twelfth embodiment. [Figure 16] 13A to 13C are diagrams illustrating an example of a connection method for PCa members according to the 13th embodiment. [Figure 17A]It is a diagram for explaining an example of a method for connecting PCa members according to the 14th embodiment. [Figure 17B] It is a view taken along the line B-B of FIG. 17A. [Figure 18] It is a diagram for explaining an example of a method for connecting PCa members according to the 15th embodiment. [Figure 19] It is a diagram for explaining an example of a method for connecting PCa members according to the 16th embodiment. [Figure 20] It is a diagram for explaining an example of a method for connecting PCa members according to the 17th embodiment. [Figure 21] It is a diagram for explaining an example of a method for connecting PCa members according to the 18th embodiment. [Figure 22] It is a diagram for explaining an example of a method for connecting PCa members according to the 19th embodiment.

Modes for Carrying Out the Invention

[0034] Hereinafter, an example of a method for connecting PCa members according to each embodiment will be described with reference to the accompanying drawings. In the present specification and drawings, substantially the same components may be denoted by the same reference numerals, and redundant descriptions may be omitted.

[0035] [Embodiment] <Overview of the PCa member, the column-beam joint, and the method for connecting the PCa members> First, an example of a PCa member and a column-beam joint that constitute a building and an overview of a connection method of the PCa member will be described with reference to Figs. 1 to 3. Here, Fig. 1A is a diagram that shows a PCa joint and a PCa column and a column-beam joint that are provided in a 10-story building, Fig. 1B is a diagram that explains an example of a connection method of the PCa member according to the embodiment, and explains an assembly procedure by forward insertion using a lotus root PCa joint, Fig. 1C is a diagram that shows a state before grout injection formed by the assembly procedure of Fig. 1B, and Fig. 1D is a DD arrow view of Fig. 1C. Also, Fig. 2A is a diagram that explains another example of a connection method of the PCa member according to the embodiment, and explains an assembly procedure by reverse insertion using a lotus root PCa joint, and Fig. 2B is a diagram that shows a state before grout injection formed by the assembly procedure of Fig. 2A. Furthermore, Figure 3A is a diagram illustrating yet another example of a method for connecting PCa members according to an embodiment, and is a diagram illustrating an assembly procedure using a full PCa joint, Figure 3B is a diagram showing the state before grout injection formed by the assembly procedure of Figure 3A, and Figure 3C is a view taken along the CC arrow of Figure 3B.

[0036] The structure shown in Fig. 1A is a laminated structure of PCa columns 20 on each floor constituting a 10-story building and PCa joints 10 provided between each floor, and a column-beam joint 50 is formed on each floor by the PCa joints 10, the lower columns 20A, and the upper columns 20B. Here, the PCa joints 10 and the lower columns 20A and the upper columns 20B, which are the PCa columns 20, are included in the PCa members. Note that the number of floors of the building is not limited to 10.

[0037] PCa joint 10 is a precast joint used in RC construction (reinforced concrete construction) or SRC construction (steel reinforced concrete construction), but in the method of connecting PCa members according to the embodiment described in detail below, it is described as a joint with a structure in which concrete is filled inside a surrounding plate made of a rectangular frame-shaped steel plate and reinforcing bars pass through the inside of the concrete (including a form in which a sheath tube passes through).

[0038] For example, the rectangular parallelepiped PCa joint 10 may have a steel beam that protrudes laterally from four or three or fewer sides, or may have no steel beam protruding from it, but in the PCa member connection method according to the embodiment described below in detail, the steel beam is described as protruding laterally from four sides. The length of the steel beam that protrudes from the PCa joint 10 is set to a length that will not cause the joint with the other connected steel beam to become a structurally weak part, in relation to the generated bending moment, etc.

[0039] Furthermore, the lower column 20A and the upper column 20B are basically PCa columns of RC construction, but may also be PCa columns of SRC construction.

[0040] A lower horizontal joint 31 is formed with grout between the PCa connection 10 and the lower column 20A, and an upper horizontal joint 32 is formed with grout between the PCa connection 10 and the upper column 20B. The connection methods for PCa members according to each embodiment described in detail below are all connection methods characterized by an efficient method of filling the grout.

[0041] There are three main types of assembly configurations of the PCa joint 10 and the lower and upper columns 20A and 20B prior to filling with grout: the configuration shown in Figures 1B to 1D, the configuration shown in Figures 2A and 2B, and the configuration shown in Figures 3A to 3C.

[0042] 1B to 1D, as described above, a lotus root PCa joint with a main reinforcement through hole 12 is applied as a PCa joint 10 with a rectangular frame-shaped steel surrounding plate 11, the column main reinforcement 23 protrudes from the upper end surface 21 of the lower column 20A, a joint pipe 25 is buried inside from the lower end surface 22 of the upper column 20B, and the end of the column main reinforcement 23 inserted into the main reinforcement through hole 12 is inserted into the joint pipe 25, which is a forward insertion assembly form. Note that a PCa joint without a surrounding plate 11 or a PCa joint without a steel beam may be applied.

[0043] As shown in Fig. 1B, a plurality of column main reinforcements 23 protrude from the upper end surface 21 of the lower column 20A, and a plurality of main reinforcement through holes 12 (sheath tubes) through which the column main reinforcements 23 are inserted are embedded in the PCa joint 10. As shown in Fig. 1D, in the illustrated example, nine main reinforcement through holes 12 through which nine column main reinforcements 23 are inserted are embedded. In addition to the main reinforcement through holes 12, an injection through hole 15 through which an injection hose 40 for injecting grout is installed is also embedded in the example shown in Fig. 1B. Note that one or more of the plurality of main reinforcement through holes 12 may be used as the injection through hole without providing the injection through hole 15.

[0044] A plurality of joint pipes 25, into which the ends of each of the column main reinforcements 23 are inserted, are buried inward from the lower end surface 22 of the upper column 20B, and the column main reinforcements 23 are buried so as to abut against the joint pipes 25.

[0045] As shown in FIG. 1B, while inserting the column main reinforcements 23 into the main reinforcement through holes 12 corresponding to each column main reinforcement 23 protruding upward with respect to the lower column 20A, the PCa joint 10 is dropped vertically downward in the X1 direction.

[0046] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided upward from the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided downward from the lower end surface of the PCa joint 10, and the PCa joint 10 is placed via these spacers or protrusions. In this state, as shown in Figure 1C, a lower horizontal joint gap 27 is formed between the lower column 20A and the PCa joint 10. The tip of an injection hose 40 is installed in the injection through hole 15.

[0047] Next, as shown in FIG. 1B, while inserting the ends of the column main reinforcements 23 into the joint pipes 25 corresponding to each column main reinforcement 23 protruding upward into the PCa joint 10, the upper column 20B is dropped vertically downward in the X2 direction.

[0048] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end face of the PCa joint 10, or a protrusion of a predetermined height is provided downward from the lower end face 22 of the upper column 20B, or a protrusion of a predetermined height is provided upward from the upper end face of the PCa joint 10, and the upper column 20B is placed via these spacers or protrusions. In this state, as shown in Figure 1C, an upper horizontal joint gap 28 is formed between the PCa joint 10 and the upper column 20B.

[0049] As shown in Fig. 1C, after the lower column 20A, PCa connection 10, and upper column 20B are assembled to form the lower horizontal joint gap 27 and the upper horizontal joint gap 28, a band-shaped formwork (not shown) is assembled to surround the lower horizontal joint gap 27 and the upper horizontal joint gap 28 on the outer periphery to prevent leakage of the filled grout. Here, it is preferable that the formwork has an air vent hole.

[0050] 2A and 2B, as described above, a lotus root PCa joint with a main reinforcement through hole 12 is applied as a PCa joint 10 with a rectangular frame-shaped steel surrounding plate 11, the column main reinforcement 23 protrudes from the lower end surface 22 of the upper column 20B, a joint pipe 25 is buried inside from the upper end surface 21 of the lower column 20A, and the end of the column main reinforcement 23 inserted into the main reinforcement through hole 12 is inserted into the joint pipe 25, which is an assembly form by reverse insertion. Note that a PCa joint without a surrounding plate 11 or a PCa joint without a steel beam may be applied.

[0051] As shown in Fig. 2A, a plurality of column main reinforcements 23 protrude from the lower end surface 22 of the upper column 20B, and a plurality of main reinforcement through holes 12 (sheath tubes) through which the column main reinforcements 23 are inserted are embedded in the PCa joint 10. In the example shown in Fig. 2A, in addition to the main reinforcement through holes 12, an injection through hole 15 through which an injection hose 40 for injecting grout is installed is also embedded.

[0052] In addition, a plurality of joint pipes 25, into which the ends of each of the column main reinforcements 23 are inserted, are buried inward from the upper end surface 21 of the lower column 20A, and the column main reinforcements 23 are buried so as to abut against the joint pipes 25.

[0053] As shown in FIG. 2A, the PCa connection 10 is placed vertically downward in the X3 direction while aligning each joint pipe 25 with the corresponding main reinforcement through hole 12 relative to the lower column 20A.

[0054] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided upward from the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided downward from the lower end surface of the PCa joint 10, and the PCa joint 10 is placed on the lower column 20A via these spacers or protrusions. In this state, as shown in Figure 2B, a lower horizontal joint gap 27 is formed between the lower column 20A and the PCa joint 10. The tip of the injection hose 40 is installed in the injection through hole 15.

[0055] Next, as shown in FIG. 2A , each of the column main reinforcements 23 protruding downward into each of the main reinforcement through holes 12 is inserted into the PCa joint 10, and further, the ends of each of the column main reinforcements 23 are inserted into the joint pipes 25 while dropping the upper column 20B vertically downward in the X4 direction.

[0056] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end face of the PCa joint 10, or a protrusion of a predetermined height is provided downward from the lower end face 22 of the upper column 20B, or a protrusion of a predetermined height is provided upward from the upper end face of the PCa joint 10, and the upper column 20B is placed via these spacers or protrusions. In this state, as shown in Figure 2B, an upper horizontal joint gap 28 is formed between the PCa joint 10 and the upper column 20B.

[0057] As shown in Figure 2B, after the lower column 20A, PCa joint 10, and upper column 20B are assembled and the lower horizontal joint gap 27 and the upper horizontal joint gap 28 are formed, a band-shaped formwork (not shown) is assembled to surround the lower horizontal joint gap 27 and the upper horizontal joint gap 28 on the outer periphery to prevent leakage of the filled grout.

[0058] 3A to 3C, as described above, a full PCa connection is applied as a PCa connection 10A having a rectangular frame-shaped steel surrounding plate 11, in which the column main reinforcement bars 24 protrude from the upper and lower end faces, and a joint pipe 25 is buried inward from the lower end face 22 of the upper column 20B and a joint pipe 25 is buried inward from the upper end face 21 of the lower column 20A, and the ends of the column main reinforcement bars 24 protruding upward and downward are inserted into each joint pipe 25. Note that a PCa connection without a surrounding plate 11 or a PCa connection without a steel beam may be applied.

[0059] As shown in Fig. 3A, a plurality of column main reinforcements 23 protrude from the upper and lower end faces of the PCa joint 10A, and a plurality of joint pipes 25 into which the ends of the column main reinforcements 23 are inserted are embedded in the lower column 20A and the upper column 20B. As shown in Fig. 3C, in the illustrated example, nine column main reinforcements 24 protrude above and below the PCa joint 10A, and nine joint pipes 25 are embedded in corresponding positions of the lower column 20A and the upper column 20B.

[0060] As shown in FIG. 3A, while inserting the column main reinforcements 24 into the joint pipes 25 corresponding to each column main reinforcement 24 protruding downward from the lower column 20A, the PCa joint 10A is dropped vertically downward in the X5 direction.

[0061] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided upward from the upper end surface 21 of the lower column 20A, or a protrusion of a predetermined height is provided downward from the lower end surface of the PCa joint 10A, and the PCa joint 10A is placed via these spacers or protrusions. In this state, as shown in Figure 3B, a lower horizontal joint gap 27 is formed between the lower column 20A and the PCa joint 10A.

[0062] Next, as shown in FIG. 3A, while inserting the ends of each of the column main reinforcements 24 protruding upward into the corresponding joint pipes 25, the upper column 20B is dropped vertically downward in the X6 direction into the PCa connection 10A.

[0063] At this time, a separate spacer (not shown) of a predetermined height is provided on the upper end face of the PCa joint 10A, or a protrusion of a predetermined height is provided downward from the lower end face 22 of the upper column 20B, or a protrusion of a predetermined height is provided upward from the upper end face of the PCa joint 10, and the upper column 20B is placed via these spacers or protrusions. In this state, as shown in Figure 3B, an upper horizontal joint gap 28 is formed between the PCa joint 10A and the upper column 20B.

[0064] As shown in Figure 3B, after the lower column 20A, PCa joint 10A, and upper column 20B are assembled and the lower horizontal joint gap 27 and the upper horizontal joint gap 28 are formed, a band-shaped formwork (not shown) is assembled to surround the lower horizontal joint gap 27 and the upper horizontal joint gap 28 on the outer periphery to prevent leakage of the filled grout.

[0065] Next, a method for connecting PCa members according to an embodiment will be described, in which various grout injection methods are applied to each assembly form.

[0066] <Connection method for PCa members according to the first embodiment> Next, an example of a method for connecting PCa members according to the first embodiment will be described with reference to Fig. 4. Here, Fig. 4A is a diagram for explaining an example of a method for connecting PCa members according to the first embodiment, and Fig. 4B is a view taken along the line BB in Fig. 4A. In the following description of the connection method of each embodiment, Figs. 1 to 3 will be referred to as appropriate in the description of steps A1 and A2.

[0067] The connection method shown in Figure 4 is the forward insertion form shown in Figure 1, and is a method of connecting PCa members in which grout is continuously filled into the lower horizontal joint gap 27, each main reinforcement through hole 12, the upper horizontal joint gap 28, and each joint pipe 25.

[0068] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0069] Next, by injecting grout in the Y1 direction from the injection hose 40 installed in the injection through hole 15, the grout is filled horizontally in the Y2 direction into the lower horizontal joint gap 27, then each main reinforcement through hole 12 is filled by moving it upward in the Y3 direction, then the grout is filled horizontally in the Y4 direction into the upper horizontal joint gap 28, and then each joint pipe 25 is filled in the Y5 direction, performing a series of continuous fillings (step B1).

[0070] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0071] According to the connection method of the illustrated example, in step B1, grout can be continuously filled into the upper horizontal joint gap 28, the lower horizontal joint gap 27, each main reinforcement through hole 12, and each joint pipe 25, thereby achieving efficient grout injection and shortening the construction period.

[0072] Furthermore, in the connection methods for PCa members according to other embodiments described below, by including the Bn process (n = 1 to 11), the same effect is achieved in that efficient grout injection is achieved and construction time can be shortened.

[0073] Here, in a 10-story building (a building with 3 or more floors) as shown in Fig. 1A, step A1 is carried out on, for example, the 1st to 5th floors out of all floors, then steps B1 and C are carried out, and then step A1 is carried out on the remaining 6th to 10th floors, then steps B1 and C are carried out, thereby making it possible to construct PCa columns extremely efficiently even in high-rise buildings. Note that in the connection methods for PCa members according to each embodiment shown below, PCa columns can be constructed in a similar manner.

[0074] <Connection method for PCa members according to the second embodiment> Next, an example of a method for connecting PCa members according to the second embodiment will be described with reference to Fig. 5. Here, Fig. 5A is a diagram for explaining an example of a method for connecting PCa members according to the second embodiment, and Fig. 5B is a view taken along the arrow BB in Fig. 5A.

[0075] The connection method shown in Figure 5 is the reverse insertion form shown in Figure 2, and is a connection method for PCa members in which grout is continuously filled into the lower horizontal joint gap 27, each main reinforcement through hole 12, each joint pipe 25, and the upper horizontal joint gap 28.

[0076] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0077] Next, by injecting grout in the Y1 direction from the injection hose 40 installed in the injection through hole 15, the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, then filled in the Y3 direction in each joint pipe 25, then filled in each main reinforcement through hole 12 by raising it in the Y4 direction, and then filled horizontally in the Y5 direction in the upper horizontal joint gap 28, performing a series of continuous fillings (step B1).

[0078] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0079] Even with the connection method shown in the figure, in step B1, grout can be continuously filled into the upper horizontal joint gap 28, the lower horizontal joint gap 27, each main reinforcement through hole 12, and each joint pipe 25, thereby achieving efficient grout injection and shortening the construction period.

[0080] <Connection method for PCa members according to the third embodiment> Next, an example of a method for connecting PCa members according to the third embodiment will be described with reference to Fig. 6. Here, Fig. 6A is a diagram for explaining an example of a method for connecting PCa members according to the third embodiment, and Fig. 6B is a view taken along the arrow BB in Fig. 6A.

[0081] 6 is a forward insertion type connection method, but includes a step of using at least one joint pipe 25 as an injection joint pipe 25A and injecting grout through a joint injection hole 26 communicating with the injection joint pipe 25A. In addition to the joint injection hole 26, an air vent hole 26a is also connected to the injection joint pipe 25A.

[0082] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0083] Next, grout is injected in the Y1 direction from the injection hose 40 installed in the injection through hole 15, so that the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then each main reinforcement through hole 12 is filled by being raised in the Y3 direction (step B2).

[0084] Next, grout is injected in the Z1 direction through the joint injection hole 26 connected to the injection joint pipe 25A, so that the grout is filled horizontally in the Z2 direction in the upper horizontal joint gap 28, and then filled into each joint pipe 25 (step B3).

[0085] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0086] According to this embodiment, in step B2, grout is filled into the lower horizontal joint gap 27 and each main reinforcement through hole 12, and it is confirmed that the grout enters the upper horizontal joint gap 28 from each main reinforcement through hole 12, thereby ensuring that the lower horizontal joint gap 27 and each main reinforcement through hole 12 have been reliably filled with grout.

[0087] <Connection method for PCa members according to the fourth embodiment> Next, an example of a method for connecting PCa members according to the fourth embodiment will be described with reference to Fig. 7. Here, Fig. 7 is a diagram for explaining an example of a method for connecting PCa members according to the fourth embodiment.

[0088] 7 is a forward insertion type connection method, but includes a process of using all the joint pipes 25 as injection joint pipes 25A and injecting grout into each injection joint pipe 25A through a joint injection hole 26 communicating with the injection joint pipe 25A. In addition to the joint injection hole 26, an air vent hole 26a is also connected to each injection joint pipe 25A.

[0089] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0090] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the upper column 20B, the grout flows in the Y2 direction through the upper horizontal joint gap 28, then flows downward in the Y3 direction through each main reinforcement through hole 12, and is then supplied to the lower horizontal joint gap 27. Therefore, the grout is filled horizontally in the Y4 direction in the lower horizontal joint gap 27, then filled upward (opposite to the Y3 direction) into each main reinforcement through hole 12, and then filled horizontally in the Y2 direction in the upper horizontal joint gap 28 (B5 process).

[0091] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the upper column 20B (step B4).

[0092] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0093] <Connection method for PCa members according to the fifth embodiment> Next, an example of a method for connecting PCa members according to the fifth embodiment will be described with reference to Fig. 8. Here, Fig. 8 is a diagram for explaining an example of a method for connecting PCa members according to the fifth embodiment.

[0094] 8 is a reverse insertion type connection method, but includes a process of using all joint pipes 25 as injection joint pipes 25A and injecting grout into each injection joint pipe 25A through joint injection holes 26 communicating with the injection joint pipes 25A. Each injection joint pipe 25A is connected to an air vent hole 26a in addition to the joint injection hole 26.

[0095] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0096] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the lower column 20A (step B4).

[0097] Next, grout is injected from the injection hose 40 through the lower horizontal joint gap 27, so that the grout is filled horizontally in the Y1 direction in the lower horizontal joint gap 27, and then each main reinforcement through hole 12 is filled by raising it in the Y2 direction, and then the grout is filled horizontally in the upper horizontal joint gap 28 in the Y3 direction (step B5).

[0098] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0099] According to this embodiment, by checking in step B4 that grout enters the lower horizontal joint gap 27 from each joint pipe 25, it is possible to ensure that each joint pipe 25 has been reliably filled with grout.

[0100] <Connection method for PCa members according to the sixth embodiment> Next, an example of a method for connecting PCa members according to the sixth embodiment will be described with reference to Fig. 9. Here, Fig. 9 is a diagram for explaining an example of a method for connecting PCa members according to the sixth embodiment.

[0101] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0102] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the lower column 20A (step B4).

[0103] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the upper column 20B, the grout flows in the Y2 direction through the upper horizontal joint gap 28, then flows downward in the Y3 direction through each main reinforcement through hole 12, and is then supplied to the lower horizontal joint gap 27. Therefore, the grout is filled horizontally in the Y4 direction in the lower horizontal joint gap 27, then filled upward (opposite to the Y3 direction) into each main reinforcement through hole 12, and then filled horizontally in the Y2 direction in the upper horizontal joint gap 28 (B5 process).

[0104] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0105] According to this embodiment, by checking in step B4 that grout enters the lower horizontal joint gap 27 from each joint pipe 25, it is possible to ensure that each joint pipe 25 has been reliably filled with grout.

[0106] <Method of connecting PCa members according to the seventh embodiment> Next, an example of a method for connecting PCa members according to the seventh embodiment will be described with reference to Fig. 10. Here, Fig. 10 is a diagram for explaining an example of a method for connecting PCa members according to the seventh embodiment.

[0107] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0108] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the lower column 20A (step B4).

[0109] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the lower column 20A, the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then each main reinforcement through hole 12 is filled by moving it upward in the Y3 direction, and then the grout is filled horizontally in the Y4 direction in the upper horizontal joint gap 28 (step B5).

[0110] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0111] According to this embodiment, by checking in step B4 that grout enters the lower horizontal joint gap 27 from each joint pipe 25, it is possible to ensure that each joint pipe 25 has been reliably filled with grout.

[0112] <Connection method for PCa members according to the eighth embodiment> Next, an example of a method for connecting PCa members according to the eighth embodiment will be described with reference to Fig. 11. Here, Fig. 11 is a diagram for explaining an example of a method for connecting PCa members according to the eighth embodiment.

[0113] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0114] Next, by injecting grout from the injection hose 40 through the lower horizontal joint gap 27, the grout is filled horizontally in the Y1 direction in the lower horizontal joint gap 27, then each main reinforcement through hole 12 is filled by moving it upward in the Y2 direction, then the grout is filled horizontally in the Y3 direction in the upper horizontal joint gap 28, and then each joint pipe 25 is filled in the Y4 direction (step B6).

[0115] It is preferable that each joint pipe 25 is provided with one or more air vent holes (not shown).

[0116] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0117] <Connection method for PCa members according to the ninth embodiment> Next, an example of a method for connecting PCa members according to the ninth embodiment will be described with reference to Fig. 12. Here, Fig. 12 is a diagram for explaining an example of a method for connecting PCa members according to the ninth embodiment.

[0118] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0119] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the upper column 20B, the grout flows in the Y2 direction through the upper horizontal joint gap 28, then flows downward in the Y3 direction through each main reinforcement through hole 12, and is then supplied to the lower horizontal joint gap 27. Therefore, the grout is filled horizontally in the Y4 direction in the lower horizontal joint gap 27, then filled upward in each main reinforcement through hole 12 (opposite to the Y3 direction), then filled horizontally in the Y2 direction in the upper horizontal joint gap 28, and then filled in the Y5 direction in each joint pipe 25 (B6 step).

[0120] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0121] <Method of connecting PCa members according to the tenth embodiment> Next, an example of a method for connecting PCa members according to the tenth embodiment will be described with reference to Fig. 13. Here, Fig. 13 is a diagram for explaining an example of a method for connecting PCa members according to the tenth embodiment.

[0122] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0123] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the lower column 20A, the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, then each main reinforcement through hole 12 is filled by moving it upward in the Y3 direction, then the grout is filled horizontally in the Y4 direction in the upper horizontal joint gap 28, and then each joint pipe 25 is filled in the Y5 direction (step B6).

[0124] It is preferable that each joint pipe 25 is provided with one or more air vent holes (not shown).

[0125] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0126] <Connection method for PCa members according to the 11th embodiment> Next, an example of a method for connecting PCa members according to the 11th embodiment will be described with reference to Fig. 14. Here, Fig. 14 is a diagram for explaining an example of a method for connecting PCa members according to the 11th embodiment.

[0127] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0128] Next, grout is injected from the injection hose 40 through the lower horizontal joint gap 27, so that the grout is filled horizontally in the Y1 direction in the lower horizontal joint gap 27, and then each coupling pipe 25 is filled vertically downward in the Y2 direction, and each main reinforcement through hole 12 is filled upward in the Y3 direction, and then the grout is filled horizontally in the Y4 direction in the upper horizontal joint gap 28 (step B6).

[0129] It is preferable that each joint pipe 25 is provided with one or more air vent holes (not shown).

[0130] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0131] <Method of connecting PCa members according to the twelfth embodiment> Next, an example of a method for connecting PCa members according to the 12th embodiment will be described with reference to Fig. 15. Here, Fig. 15 is a diagram for explaining an example of a method for connecting PCa members according to the 12th embodiment.

[0132] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0133] Next, by injecting grout from the injection hose 40A embedded in the upper column 20B in the Y1 direction, the grout flows through the upper horizontal joint gap 28 in the Y2 direction, then flows downward through each main reinforcement through hole 12 in the Y3 direction, and is then supplied to the lower horizontal joint gap 27. Therefore, the grout flows through the lower horizontal joint gap 27 in the Y4 direction and is supplied to each joint pipe 25. Therefore, the grout fills each joint pipe 25 in an upward direction (opposite to the Y5 direction), then fills the lower horizontal joint gap 27 horizontally in the Y4 direction, then fills each main reinforcement through hole 12 in an upward direction (opposite to the Y3 direction), and then fills the upper horizontal joint gap 28 horizontally in the Y2 direction (B6 process).

[0134] It is preferable that each joint pipe 25 is provided with one or more air vent holes (not shown).

[0135] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0136] <Connection method for PCa members according to the thirteenth embodiment> Next, an example of a method for connecting PCa members according to the 13th embodiment will be described with reference to Fig. 16. Here, Fig. 16 is a diagram for explaining an example of a method for connecting PCa members according to the 13th embodiment.

[0137] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0138] Next, by injecting grout in the Y1 direction from the injection hose 40A embedded in the lower column 20A, the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then each joint pipe 25 is filled vertically downward in the Y3 direction, and each main reinforcement through hole 12 is filled upward in the Y4 direction, and then the grout is filled horizontally in the Y5 direction in the upper horizontal joint gap 28 (step B6).

[0139] It is preferable that each joint pipe 25 is provided with one or more air vent holes (not shown).

[0140] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0141] <Connection method for PCa members according to the fourteenth embodiment> Next, an example of a method for connecting PCa members according to the 14th embodiment will be described with reference to Fig. 17. Here, Fig. 17A is a diagram for explaining an example of a method for connecting PCa members according to the 14th embodiment, and Fig. 17B is a view taken along the arrow BB in Fig. 17A.

[0142] First, as shown in FIG. 2B, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0143] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the lower column 20A (step B4).

[0144] Next, by injecting grout in the Y1 direction from the injection hose 40 installed in the injection through hole 15, the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then each main reinforcement through hole 12 is filled by moving it upward in the Y3 direction, and then the grout is filled horizontally in the Y4 direction in the upper horizontal joint gap 28 (step B7).

[0145] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0146] According to this embodiment, by checking in step B4 that grout enters the lower horizontal joint gap 27 from each joint pipe 25, it is possible to ensure that each joint pipe 25 has been reliably filled with grout.

[0147] <Connection method for PCa members according to the fifteenth embodiment> Next, an example of a method for connecting PCa members according to the fifteenth embodiment will be described with reference to Fig. 18. Here, Fig. 18 is a diagram for explaining an example of a method for connecting PCa members according to the fifteenth embodiment.

[0148] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0149] Next, grout is injected from the injection hose 40 through the lower horizontal joint gap 27, filling the grout horizontally in the Y1 direction in the lower horizontal joint gap 27, and then filling each joint pipe 25 by moving the grout upward in the Y2 direction (step B8).

[0150] Next, grout is injected in the Z1 direction through the joint injection hole 26 connected to the injection joint pipe 25A, so that the grout is filled horizontally in the Z2 direction in the upper horizontal joint gap 28, and then filled into each joint pipe 25 (step B3).

[0151] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0152] <Connection method for PCa members according to the sixteenth embodiment> Next, an example of a method for connecting PCa members according to the sixteenth embodiment will be described with reference to Fig. 19. Here, Fig. 19 is a diagram for explaining an example of a method for connecting PCa members according to the sixteenth embodiment.

[0153] First, as shown in FIG. 1C, the lower pillar 20A, the PCa joint 10, and the upper pillar 20B are assembled (A1 step).

[0154] Next, grout is injected in the Y1 direction from the injection hose 40A embedded in the lower column 20A, so that the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then each main reinforcement through hole 12 is filled upward in the Y3 direction (step B8).

[0155] Next, grout is injected in the Z1 direction through the joint injection hole 26 connected to the injection joint pipe 25A, so that the grout is filled horizontally in the Z2 direction in the upper horizontal joint gap 28, and then filled into each joint pipe 25 (step B3).

[0156] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0157] <Connection method for PCa members according to the seventeenth embodiment> Next, an example of a method for connecting PCa members according to the seventeenth embodiment will be described with reference to Fig. 20. Here, Fig. 20 is a diagram for explaining an example of a method for connecting PCa members according to the seventeenth embodiment.

[0158] The connection method shown in Figure 20 is an assembly form that applies the full PCa joint shown in Figure 3, and is a method of connecting PCa members in which grout is continuously filled into the lower horizontal joint gap 27 and each joint pipe 25, and the upper horizontal joint gap 28 and each joint pipe 25, respectively.

[0159] First, as shown in FIG. 3B, the lower pillar 20A, the PCa joint 10A, and the upper pillar 20B are assembled (A2 step).

[0160] Next, in the lower column 20A, grout is injected in the Y1 direction through the joint injection hole 26 communicating with the injection joint pipe 25A, so that the grout is filled horizontally in the Y2 direction in the lower horizontal joint gap 27, and then filled in the Y3 direction in each joint pipe 25. Furthermore, in the upper column 20B, grout is injected in the Y4 direction through the joint injection hole 26 communicating with the injection joint pipe 25A, so that the grout is filled horizontally in the Y5 direction in the upper horizontal joint gap 28, and then filled in the Y6 direction in each joint pipe 25 (B9 step).

[0161] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0162] <Connection method for PCa members according to the 18th embodiment> Next, an example of a method for connecting PCa members according to the 18th embodiment will be described with reference to Fig. 21. Here, Fig. 21 is a diagram for explaining an example of a method for connecting PCa members according to the 18th embodiment.

[0163] The method of connecting PCa members in this embodiment is, as shown in Figure 20, to connect two branch hoses 26b of a common injection hose to each joint injection hole 26 provided on the lower column 20A and the upper column 20B, and simultaneously inject grout in the Y0 direction into the lower horizontal joint gap 27 and each joint pipe 25, 25A communicating therewith, and into the upper horizontal joint gap 28 and each joint pipe 25, 25A communicating therewith.

[0164] According to this connection method, grout can be injected from above and below at the same time, which allows for more efficient grout filling.

[0165] <Connection method for PCa members according to the 19th embodiment> Next, an example of a method for connecting PCa members according to the 19th embodiment will be described with reference to Fig. 22. Here, Fig. 22 is a diagram for explaining an example of a method for connecting PCa members according to the 19th embodiment.

[0166] First, as shown in FIG. 3B, the lower pillar 20A, the PCa joint 10A, and the upper pillar 20B are assembled (A2 step).

[0167] Next, grout is filled into each joint pipe 25A in the Z1 direction through the joint injection holes 26 communicating with each joint pipe 25A embedded in the lower column 20A, and then grout is filled horizontally in the Y1 direction from the lower horizontal joint gap 27 (step B10).

[0168] Next, in the upper column 20B, grout is injected in the Y2 direction through the joint injection hole 26 connected to the injection joint pipe 25A, so that the grout is filled horizontally in the Y3 direction in the upper horizontal joint gap 28, and then filled into each joint pipe 25 in the Y4 direction (step B11).

[0169] Next, after waiting for the grout to harden, a lower horizontal joint 31 is formed in the gap 27 for the lower horizontal joint (see Figure 1A), and an upper horizontal joint 32 is formed in the gap 28 for the upper horizontal joint (see Figure 1A), thereby connecting the PCa members (process C).

[0170] According to this embodiment, by checking in step B10 that grout enters the lower horizontal joint gap 27 from each joint pipe 25, it is possible to ensure that each joint pipe 25 has been reliably filled with grout.

[0171] The present invention is not limited to the configurations shown here, and may be implemented in other embodiments in which other components are combined with the configurations and the like set forth in the above embodiments. In this regard, the present invention may be modified without departing from the spirit of the present invention, and may be appropriately determined according to the application form. [Explanation of symbols]

[0172] 10: PCa joint (lotus root PCa joint) 10A: PCa joint (full PCa joint) 11: Enclosure 12: Main reinforcement through hole (sheath tube) 13: Steel beam 15: Through hole for injection 20: PCa pillar 20A: Lower pillar (PCa pillar) 20B: Upper pillar (PCa pillar) 21: Upper end surface 22: Bottom end surface 23,24:Column main reinforcement 25: Joint pipe 25A: Injection and other joint pipes 26: Joint injection hole 26a: Air vent hole 26b: Branch hose 27: Gap for lower horizontal joint 28: Upper horizontal joint gap 31: Lower horizontal joint 32: Upper horizontal joint 40, 40A: Injection hose 50: Column beam joint

Claims

1. A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint includes a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process of passing each of the plurality of column main reinforcements through the corresponding main reinforcement through holes, and inserting the end of the column main reinforcement protruding from the main reinforcement through holes into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, forming a lower horizontal joint gap between the lower column and the PCa joint, and forming an upper horizontal joint gap between the PCa joint and the upper column; B1 process: by injecting grout from one of the main reinforcement through holes through the upper horizontal joint gap or the lower horizontal joint gap, the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then the grout is filled by raising or lowering each main reinforcement through hole, then the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then the grout is filled into each joint pipe; A method for connecting PCa members, comprising: a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

2. A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint includes a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process of passing each of the plurality of column main reinforcements through the corresponding main reinforcement through holes, and inserting the end of the column main reinforcement protruding from the main reinforcement through holes into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, forming a lower horizontal joint gap between the lower column and the PCa joint, and forming an upper horizontal joint gap between the PCa joint and the upper column; B2 process: a series of continuous filling steps are performed in which the grout is injected from one of the main reinforcement through holes through the upper horizontal joint gap or the lower horizontal joint gap, so that the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then each main reinforcement through hole is filled by raising or lowering it; At least one of the joint pipes is used as an injection joint pipe, and grout is injected through a joint injection hole communicating with the injection joint pipe to fill the grout horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, and then into each joint pipe, thereby performing a series of continuous filling steps; B3 step; A method for connecting PCa members, comprising: a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

3. A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint includes a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process of passing each of the plurality of column main reinforcements through the corresponding main reinforcement through holes, and inserting the end of the column main reinforcement protruding from the main reinforcement through holes into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, forming a lower horizontal joint gap between the lower column and the PCa joint, and forming an upper horizontal joint gap between the PCa joint and the upper column; B4 step of filling each joint pipe with grout through a joint injection hole communicating with each of the joint pipes; B5 process: by injecting grout from one of the main reinforcement through holes through the upper horizontal joint gap or the lower horizontal joint gap, the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then the grout is filled by raising or lowering each main reinforcement through hole, and then the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap; A method for connecting PCa members, comprising: a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

4. A method for connecting PCa members, which connects a PCa joint, which is a joint made of precast concrete, to a PCa column, which is a lower column and an upper column made of precast concrete, A plurality of column main reinforcements protrude from one end surface of the lower column or the upper column, The PCa joint includes a plurality of main reinforcement through holes through which the plurality of column main reinforcements respectively pass, A plurality of joint pipes into which the ends of the plurality of protruding column main reinforcements are inserted are embedded from the other end face of either the lower column or the upper column to the inside, A1 process of passing each of the plurality of column main reinforcements through the corresponding main reinforcement through holes, and inserting the end of the column main reinforcement protruding from the main reinforcement through holes into the corresponding joint pipe to stack the lower column, the PCa joint, and the upper column, and at this time, forming a lower horizontal joint gap between the lower column and the PCa joint, and forming an upper horizontal joint gap between the PCa joint and the upper column; B4 step of filling each joint pipe with grout through a joint injection hole communicating with each of the joint pipes; B7 process, in which grout is injected from one of the main reinforcement through holes through the upper horizontal joint gap or the lower horizontal joint gap, the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap, then the grout is filled by raising or lowering each main reinforcement through hole, and then the grout is filled horizontally into either the lower horizontal joint gap or the upper horizontal joint gap; A method for connecting PCa members, comprising: a process C of waiting for the grout to harden, forming a lower horizontal joint in the gap for the lower horizontal joint, and forming an upper horizontal joint in the gap for the upper horizontal joint, thereby connecting the PCa members.

5. In buildings with three or more floors, The A1 step is carried out on a predetermined number of floors among all floors, and then one or more of the B1 step to the B5 step and the B7 step and the C step are carried out; A method for connecting PCa members described in any one of claims 1 to 4, characterized in that next, on the remaining floors, the A1 process is carried out, and then one or more of the B1 process to the B5 process and the B7 process and the C process are carried out.

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