JP2005299241A - Connecting method of pre-cast concrete structure member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting method of precast concrete structure members capable of easily connecting the PCa structure members by greatly improving workability without projecting reinforcement when the PCa structure members are connected and, at the same time, carrying out every structure member by a PCa method. <P>SOLUTION: A sleeve 3a is provided to the PCa structure member 1a, a screw cut connection reinforcement 4 is moveably inserted in the sleeve 3a, and a nut 6 is screwed to the front end of the connection reinforcement 4. The sleeve 3a of the PCa structure member 1a and a sleeve 3b of the PCa structure member 1b are opposingly arranged to each other, and the connection reinforcement 4 is moved upward by rotating the nut 6. When the connection reinforcement 4 is moved inside of the sleeve 3b of the PCa structure member 1b by a predetermined quantity, the sleeves 3a and 3b are filled with grout materials 8a and 8b to fix. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for joining precast concrete structural members, and more particularly, to a method for joining precast concrete structural members that has good workability and enables all structural members to be constructed by a precast concrete construction method.

  The precast concrete (hereinafter referred to as “PCa”) method is a method of constructing a structure by assembling structural members of reinforced concrete previously formed in a factory on site. When the PCa construction method is used, the construction period can be shortened and the cost can be reduced. There are various types of PCa structural members such as PCa pillars, PCa beams, PCa floors, PCa curtain walls, and PCa balconies. In the PCa construction method, a structure is constructed by connecting these PCa structural members.

As a connection method of the PCa structural members, various types have been proposed as shown in Patent Documents 1 to 4, for example.
Patent Publication No. 5-23984 Patent Publication 6-180017 Patent Publication No. 7-62669 Patent Publication 8-35305 Patent Publication 2002-242299

  However, although the conventional PCa structural member coupling methods are different in the connection method, in any case, a reinforcing bar is projected from one PCa structural member, and this reinforcing bar is inserted into the other PCa structural member and fixed.

  That is, as shown in FIG. 32, a connecting reinforcing bar 302 is projected from one PCa structural member 301a, a sleeve 303 is provided on the other PCa structural member 301b, and the PCa structural member 301b is lifted to project from the structural member 301a. The reinforcing bar 302 is inserted into the sleeve 303 of the structural member 301b and fixed.

  In such a coupling method, it is necessary to insert a reinforcing bar protruding from one structural member into the other structural member. For this purpose, an operation of lifting the upper structural member 301b with a crane or the like and dropping it into the lower structural member 301a is required, and high workability is required. In addition, when there is an obstacle at the upper part of the structure, it is difficult to use the PCa method because the upper structural member 301b cannot be lifted by a crane or the like.

  Moreover, in such a conventional connection system, the reinforcing bar protrudes from the structural member. Therefore, as shown in FIG. 33, when the beam 312 of the PCa structural member is inserted and attached between the pillar 311a and the pillar 311b, the reinforcing bars 313, 313,. become. For this reason, conventionally, it is impossible to use the PCa method when inserting a beam between columns or panels.

  The object of the present invention is to improve the workability in view of the above-mentioned problems, and to easily connect the PCa structural members, and to make all the structural members realizable by the PCa construction method. The object is to provide a coupling method.

  A method for joining precast concrete members according to a first aspect of the present invention is a method for joining precast concrete members for connecting a structural member of a first precast concrete and a structural member of a second precast concrete. A sleeve member is provided in advance on the structural member of the precast concrete of No. 2, the connecting reinforcing bar screwed on the sleeve member of the first structural member is movably inserted, and a nut is screwed onto the tip of the connecting reinforcing bar. The sleeve member of the structural member of the first precast concrete and the sleeve member of the structural member of the second precast concrete are arranged so as to face each other, and by rotating the nut, the sleeve member of the structural member of the first precast concrete is removed. Sleeve portion of second precast concrete structural member When the connecting reinforcing bar is moved by a predetermined amount into the sleeve member of the second structural member, the grout material is filled in at least one of the first and second structural members. And is fixed.

  In the second invention, in the first invention, preferably, a marker indicating the amount of movement of the connecting reinforcing bar is added to the connecting reinforcing bar.

  In the third invention, in the first invention, preferably, a stopper indicating the amount of movement of the connecting reinforcing bar is added to the connecting reinforcing bar.

  In a fourth invention, in the first invention, preferably, a jig having a reinforcing bar fixing portion having a shape corresponding to the connecting reinforcing bar is provided, the reinforcing bar fixing portion of the jig is fitted to the connecting reinforcing bar, and a nut is provided. This prevents rotation of the connecting rebar when rotating.

  In the fifth invention, in the first invention, preferably, a stopper portion is provided on the washer of the connecting rebar, and the idling of the connecting rebar is prevented by the stopper portion of the washer when the nut is rotated.

  In the sixth invention, in the first invention, preferably, the joint between the structural member of the first precast concrete and the second precast concrete is waterproofed.

  A precast concrete member joining method according to a seventh invention is a precast concrete member joining method for attaching a sash to a precast concrete structural member, wherein the sleeve member is previously attached to the precast concrete structural member, Insert the threaded connecting rebar movably, screw the nut to the end of the connecting rebar, and place the sleeve member attached to the precast concrete structural member and the mounting hardware of the sash Then, by rotating the nut, the connecting reinforcing bar is moved from the sleeve member attached to the structural member of the precast concrete toward the mounting hardware of the sash, and when the connecting reinforcing bar is moved to the mounting hardware of the sash by a predetermined amount, the structural member Grout material for sleeve member Characterized by being adapted to and fixed Hama.

  A precast concrete member joining method according to an eighth invention is a precast concrete member joining method for attaching a precast concrete wall member to a precast concrete structural member, the precast concrete structural member and the precast concrete wall. A sleeve member is preliminarily provided with a sleeve member, a connecting rebar threaded on the sleeve member of the precast concrete structural member is movably inserted, and a nut is screwed onto the tip of the connecting rebar, and the precast concrete structural member sleeve The member and the precast concrete wall member are arranged so that the sleeve members face each other, and by rotating the nut, the precast concrete wall member is changed from the sleeve member of the structural member of the precast concrete member. When the connecting rebar is moved toward the leave member and the connecting rebar is moved to the precast concrete wall member by a predetermined amount, grout material is filled into one of the precast concrete structural member or the precast concrete wall member. And try to fix it.

  In the ninth invention, in the method for joining precast concrete members according to the eighth invention, the other sleeve member of the precast concrete structural member or the precast concrete wall member is preferably filled with a urethane material. It is characterized by that.

  A method for joining precast concrete members according to a first aspect of the present invention is a method for joining precast concrete members for connecting a structural member of a first precast concrete and a structural member of a second precast concrete. A sleeve member is provided in advance on the structural member of the precast concrete of No. 2, the connecting reinforcing bar screwed on the sleeve member of the first structural member is movably inserted, and a nut is screwed onto the tip of the connecting reinforcing bar. The sleeve member of the structural member of the first precast concrete and the sleeve member of the structural member of the second precast concrete are arranged so as to face each other, and by rotating the nut, the sleeve member of the structural member of the first precast concrete is removed. Sleeve portion of second precast concrete structural member When the connecting reinforcing bar is moved by a predetermined amount into the sleeve member of the second structural member, the grout material is filled in at least one of the first and second structural members. Therefore, when connecting with the structural member of the precast concrete, the rebar does not protrude. For this reason, when performing the connection work, the hanging work with the crane is unnecessary, and the connection work can be facilitated. Moreover, a precast concrete construction method can be used even in a portion that has been conventionally difficult to be precast, such as providing a beam member between columns.

  In the second invention, by adding a marker indicating the amount of movement of the connecting reinforcing bars to the connecting reinforcing bars, the amount of movement of the connecting reinforcing bars can be understood, and the strength can be maintained by moving the connecting reinforcing bars by a sufficient amount of movement. .

  In the third invention, since the stopper indicating the amount of movement of the connecting reinforcing bar is added to the connecting reinforcing bar, the amount of movement of the connecting reinforcing bar is known, and the connecting reinforcing bar is moved by a sufficient amount of movement to maintain the strength. be able to.

  In 4th invention, the jig | tool which has the reinforcing bar fixing | fixed part which has a shape corresponding to a connecting reinforcing bar is provided, the reinforcing bar fixing | fixed part of a jig is fitted to a connecting reinforcing bar, and an idle rotation of a connecting reinforcing bar is performed when a nut is rotated. Can be prevented.

  In the fifth aspect of the present invention, the stopper of the connecting reinforcing bar is provided with a stopper, and the stopper of the washer when the nut is rotated can prevent the connecting reinforcing member from idling.

  In the sixth aspect of the invention, a waterproof measure can be taken by applying a waterproof process to the joint between the structural member of the first precast concrete and the second precast concrete.

  A precast concrete member joining method according to a seventh invention is a precast concrete member joining method for attaching a sash to a precast concrete structural member, wherein the sleeve member is attached in advance to the precast concrete structural member, Insert the threaded connecting rebar movably, screw the nut to the end of the connecting rebar, and place the sleeve member attached to the precast concrete structural member and the mounting hardware of the sash Then, by rotating the nut, the connecting reinforcing bar is moved from the sleeve member attached to the structural member of the precast concrete toward the mounting hardware of the sash, and when the connecting reinforcing bar is moved to the mounting hardware of the sash by a predetermined amount, the structural member Grout material for sleeve member By and fixed Hama, sash more easily, can be more reliably fixed.

  A precast concrete member joining method according to an eighth invention is a precast concrete member joining method for attaching a precast concrete wall member to a precast concrete structural member, the precast concrete structural member and the precast concrete wall. A sleeve member is preliminarily provided with a sleeve member, a connecting rebar threaded on a sleeve member of a precast concrete structural member is movably inserted, and a nut is screwed to the tip of the connecting rebar, and the precast concrete structural member sleeve The member and the precast concrete wall member are arranged so that the sleeve members face each other, and by rotating the nut, the precast concrete wall member is changed from the sleeve member of the structural member of the precast concrete member. When the connecting rebar is moved toward the leave member and the connecting rebar is moved to the precast concrete wall member by a predetermined amount, grout material is filled into one of the precast concrete structural member or the precast concrete wall member. Thus, the wall member of the precast concrete can be attached more easily and more reliably, and the interlayer displacement can be absorbed by the locking method.

  In the ninth invention, the other cast member of the precast concrete structural member or the precast concrete wall member is filled with urethane material, so that the precast concrete wall member can be attached more easily and more reliably. At the same time, the interlayer displacement can be absorbed by the locking method.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is applied to a connecting method for connecting PCa structural members. First, the basic construction method of the PCa structural member to which the present invention is applied will be described.
1. Basic Construction Method of PCa Structural Member to which the Present Invention is Applied FIGS. 1 to 4 show a connection structure of PCa structural members to which the present invention is applied. 1-4, the code | symbol 1a and the code | symbol 1b are PCa structural members of a reinforced concrete. Reinforcing bars 2a and 2b are embedded in the PCa structural members 1a and 1b, respectively. Sleeves 3a and 3b are driven into the PCa structural members 1a and 1b, respectively. When the sleeves 3a and 3b are driven into the PCa structural members 1a and 1b, the reinforcing bars 2a and 2b inside the PCa structural members 1a and 1b are inserted into one ends of the sleeves 3a and 3b, respectively. The connecting rebar 4 is loosely inserted into the sleeve 3a of the PCa structural member 1a. As the connecting reinforcing bar 4, a deformed reinforcing bar whose outer periphery is threaded (also referred to as a threaded reinforcing bar) is used. A nut 6 is screwed to the tip of the connecting rebar 4 through a washer 7.

  The sleeves 3a and 3b are formed in a hollow cylindrical shape. The inner diameters of the sleeves 3 a and 3 b are larger than the outer diameter of the reinforcing bars 2 a and 2 ba and the outer diameter of the connecting reinforcing bar 4. The sleeves 3a and 3b are preferably made of, for example, ductile cast iron, SS material, or one having the same strength. The sleeves 3a and 3b are formed with grout filling ports 5a, 5b and 5c, 5d.

  A basic work process in the case where the PCa structural member 1a and the PCa structural member 1b configured as described above are connected vertically will be described.

  As shown in FIG. 1, the connecting rebar 4 is loosely inserted into the sleeve 3 a of the PCa structural member 1 a disposed on the lower side of the PCa structural member 1 a and the PCa structural member 1 b, and the upper end of the connecting rebar 4 is Further, a nut 6 is screwed through a washer 7. The PCa structural member 1b is arranged on the PCa structural member 1a so that the sleeves 3a and 3b face each other. At this time, since the connecting reinforcing bar 4 is loosely inserted into the sleeve 3a of the PCa structural member 1a, the connecting reinforcing bar 4 does not protrude from the PCa structural member 1a. For this reason, the operation | work which arrange | positions the PCa structure member 1b on the PCa structure member 1a can be performed comparatively easily.

  When the PCa structural member 1b is arranged on the PCa structural member 1a, as shown in FIG. 2, the nut 6 screwed into the connecting rebar 4 is rotated so that the connecting rebar 4 moves upward. When the nut 6 is rotated, the connecting rebar 4 moves along the sleeves 3a and 3b. Here, it is assumed that the connecting reinforcing bar 4 does not rotate when the nut 6 is rotated. A method for preventing the connecting rebar 4 from rotating with the rotation of the nut 6 will be described later.

  When the nut 6 is rotated, the connecting rebar 4 moves upward, and the tip of the connecting rebar 4 enters the sleeve 3b of the PCa structural member 1b. As shown in FIG. 3, the nut 6 is rotated until the tip of the connecting reinforcing bar 4 enters the sleeve 3b of the PCa structural member 1b by a predetermined distance L1, and the connecting reinforcing bar 4 is moved upward.

  When the tip of the connecting reinforcing bar 4 is inserted into the sleeve 3b of the PCa structural member 1b by a predetermined distance L1, as shown in FIG. 4, the sleeves 3a and 3b of the PCa structural members 1a and 1b are connected to the grout filling ports 5a and 5b. , And 5c and 5d, grout materials 8a and 8b are injected. As the grout materials 8a and 8b, preferably, non-shrinkage and high strength mortar is used. Thereby, both ends of the connecting reinforcing bar 4 are fixed in the sleeves 3a and 3b of the PCa structural members 1a and 1b, respectively. Thereby, the upper and lower connection work of the PCa structural member 1a and the PCa structural member 1b is completed.

  As described above, in the PCa construction method to which the present invention is applied, the connecting rebar 4 is movably inserted into the sleeve 3a of the lower PCa structural member 1a, the connecting rebar 4 is locked with the nut 6, The PCa structural member 1b is disposed on the PCa structural member 1a so that the sleeves 3a and 3b face each other, and the nut 6 is rotated to move the connecting rebar 4 upward along the sleeves 3a and 3b. When the tip of the wire enters the sleeve 3b of the PCa structural member 1b by a predetermined distance L1, grout materials 8a and 8b are injected into the sleeves 3a and 3b of the PCa structural member 1a and 1b, and both ends of the connecting rebar 4 are connected to the PCa structural member. It is fixed to the sleeves 3a and 3b of 1a and 1b, respectively.

Thus, in the PCa construction method to which the present invention is applied, the reinforcing bars do not protrude from the PCa structural member. For this reason, when connecting a PCa structural member up and down, it is not necessary to raise a PCa structural member to a high with a crane, and workability | operativity improves significantly compared with the conventional construction method.
2. As described above, in the PCa method to which the present invention is applied, the nut 6 is rotated to move the connecting reinforcing bar 4 upward, and the connecting reinforcing bar 4 is inserted into the sleeve 3b of the PCa structural member 1b. Grout materials 8a and 8b are injected and fixed to the sleeves 3a and 3b of the structural members 1a and 1b. Therefore, as shown in FIG. 4, when the PCa structural member 1a and the PCa structural member 1b are connected, the reinforcing bar missing portions Sa and Sb are generated in the sleeves 3a and 3b. Regarding the fact that the necessary strength can be ensured even when such reinforcing bar missing portions Sa and Sb are generated, for example, “Architectural Summary of the Architectural Institute of Japan (Kanto), September 1993 (pages 141 to 142)” It is clear from the experimental results described. That is, as the sleeves 3a and 3b, those having a sufficiently long length are used, and sufficient lengths L1 and L2 into which the reinforcing bars are inserted in the sleeves 3a and 3b are sufficiently secured, so that sufficient strength can be maintained. .
3. Consideration with respect to mounting tolerance Further, in the PCa method to which the present invention is applied, the mounting tolerance between the structural members is larger than that of the conventional precast concrete method, and the connecting work is facilitated.

  That is, as shown in FIG. 5A, in the conventional method of precast concrete, the reinforcing bar 302 protrudes from one structural member, and the reinforcing bar 302 is inserted into the other sleeve 303. In this case, since a reinforcing bar is coupled to one of the structural members, only the difference between the outer diameter of the reinforcing bar 302 and the inner diameter of the sleeve 303 becomes an attachment allowable error. That is, when the inner diameter of the sleeve is t1 and the diameter of the reinforcing bar is t2, the error range is (t1-t2) / 2. For example, as shown in FIG. 5A, when the diameter of the reinforcing bar is 16 mm and the inner diameter of the sleeve 303 is 32 mm, the error range is 8 mm left and right as shown in FIG. 5B.

On the other hand, in the construction method to which the present invention is applied, as shown in FIG. 6A, the connecting rebar 4 is loosely inserted into the sleeve 3a of the structural member 1a, and the connecting rebar 4 is inserted into the sleeve 3b of the structural member 1b. It is loosely inserted. Therefore, a combination of the difference between the outer diameter of the connecting reinforcing bar 4 and the inner diameter of the sleeve 3a of the structural member 1a and the difference between the outer diameter of the connecting reinforcing bar 4 and the inner diameter of the sleeve 3b of the structural member 1b is the allowable mounting error. Become. That is, if the inner diameter of the sleeve is t1, and the diameter of the reinforcing bar is t2, the error range is 2 * (t1-t2) / 2. For example, as shown in FIG. 6A, when the diameter of the reinforcing bar is 16 mm and the inner diameters of the sleeves 3a and 3b are 32 mm, as shown in FIG. .
4). As described above, in the PCa construction method to which the present invention is applied, the nut 6 is rotated to move the connection reinforcing bar 4, and the connection reinforcing bar 4 is inserted into the sleeve 3b of the PCa structural member 1b. The grout materials 8a and 8b are injected and fixed to the sleeves 3a and 3b of the PCa structural members 1a and 1b. For this reason, in order to maintain strength, it is important to move the connecting rebar 4 accurately by a specified amount and to ensure a sufficient length for inserting the rebar in the sleeves 3a and 3b. However, the connecting rebar 4 moves in the sleeves 3a and 3b, and the amount of movement of the connecting rebar 4 cannot be visually observed from the outside.

  In FIG. 7, a marker 11 is attached to a predetermined position of the connecting reinforcing bar 4 so that the connecting reinforcing bar 4 can be moved correctly by a specified amount. As the marker 11, a marking tape may be attached, or a marking paint may be applied. When the nut 6 is rotated and the connecting rebar 4 is moved upward, the position of the marker 11 is raised accordingly. By rotating the nut 6 until the marker 11 appears at the position of the nut 6, the connecting reinforcing bar 4 can be moved by a specified amount.

  In FIG. 8, a stopper 12 is attached to a predetermined position of the connecting reinforcing bar 4 so that the connecting reinforcing bar 4 can be correctly moved by a specified amount. As the stopper 12, for example, a rubber one is used. When the nut 6 is rotated and the connecting rebar 4 is moved upward, the position of the stopper 12 is raised accordingly. When the stopper 12 reaches the position of the washer 7, the stopper 12 comes into contact with the washer 7, and the connecting rebar 4 is restricted from moving upward. Thereby, the connection reinforcing bar 4 can be moved by a specified amount.

As shown in FIG. 9, the marker 11 may be attached to a predetermined position of the connecting reinforcing bar 4 and the stopper 12 may be attached.
5). As described above, in the PCa construction method to which the present invention is applied, the nut 6 is rotated to move the connecting rebar 4 and the connecting rebar 4 is inserted into the sleeve 3b of the PCa structural member 1b. The grout materials 8a and 8b are injected and fixed to the sleeves 3a and 3b of the PCa structural members 1a and 1b. At this time, in order to simplify the explanation in the above-described example, the connecting rebar 4 does not rotate when the nut 6 is rotated. However, when the nut 6 is actually rotated, the nut 6 rotates. At the same time, the connecting rebar 4 is idle. For this reason, it is necessary to prevent the connecting rebar 4 from idling as the nut 6 rotates.

  One solution for preventing the idling of the connecting reinforcing bars 4 is to use a jig for preventing idling of the connecting reinforcing bars 4.

  FIG. 10 shows an example of the idling prevention jig. In FIG. 10, the idling prevention jig 101 includes a grip portion 102 and a reinforcing bar fixing portion 103. The grip part 102 and the reinforcing bar fixing part 103 are integrally formed from a metal plate. The grip portion 102 is a place where an operator grips the idling prevention jig 101 to work, and a rubber band 104 is wound around the grip portion 102. The reinforcing bar fixing portion 103 is provided with a concave portion 105 having a shape corresponding to the outer diameter of the connecting reinforcing bar 4, and a non-slip material 106 such as hard rubber is attached to the concave portion 105.

  When performing the work of rotating the nut 6 and moving the connecting rebar 4, the operator presses the concave portion 105 of the reinforcing bar fixing portion 103 of the anti-spinning jig 101 against the connecting rebar 4 and uses a spanner or the like. The nut 6 is rotated. Since the anti-slip material 106 is stuck to the concave portion 105, if the concave portion 105 of the reinforcing bar fixing portion 103 is pressed against the connecting reinforcing bar 4 and the nut 6 is rotated, the idling of the connecting reinforcing bar 4 can be prevented. Thereby, the nut 6 can be rotated, and the connection reinforcing bar 4 can be moved along the sleeves 3a and 3b.

  FIG. 11 shows another example of the idling prevention jig. In FIG. 11, the anti-spinning jig 111 includes a grip portion 112, a reinforcing bar fixing portion 113, a connecting portion 114, and a moving plate 120. The reinforcing bar fixing portion 113 and the connecting portion 114 are integrally formed from a metal plate. The reinforcing bar fixing portion 113 is provided with a concave portion 115 having a shape corresponding to the outer diameter of the connecting reinforcing bar 4, and a non-slip material 116 such as hard rubber is attached to the concave portion 115. For example, a rubber band 121 is wound around the grip portion 112. The moving plate 120 is formed from a metal plate, and a concave portion 117 having a shape corresponding to the outer diameter of the connecting reinforcing bar 4 is provided at the tip thereof. A non-slip material 118 such as hard rubber is provided in the concave portion 117. It is stuck. In addition, an elongated hole 119 is formed in the moving plate 120.

  The moving plate 120 is placed on the connecting portion 114, the knob bolt 122 is screwed through the elongated hole 119, and the moving plate 120 is attached to the connecting portion 114. In the idling prevention jig 111, when the knob bolt 122 is loosened, the moving plate 120 can be moved along the long hole 119.

When performing the operation of rotating the nut 6 to move the connecting reinforcing bar 4, the operator connects the connecting reinforcing bar between the recess 115 of the reinforcing bar fixing portion 113 of the anti-spinning jig 111 and the recess 117 of the moving plate 120. 4 is closely attached, the position of the moving plate 120 is adjusted, the knob bolt 122 is tightened, and the moving plate 120 is fixed at the position. If it does in this way, connecting rebar 4 will be inserted between crevice 117 of movable plate 120, and idling of connecting rebar 4 can be prevented.
6). Next, an example of preventing idling of the connecting reinforcing bars with a washer will be described. FIG. 12 shows an example of a washer configured to prevent the connecting reinforcing bar 4 from slipping. In FIG. 12, as the washer 7a placed under the nut 6, a U-shaped fitting part 131 that fits the outer shape of the connecting reinforcing bar 4 and a stopper part 132 are used. In addition, it is good also as a ring of the shape which fits the fitting part 131 to the external shape of the connection reinforcing bar 4. FIG.

  Thus, when the connecting rebar 4 is loosely inserted into the sleeve 3a of the structural member 1a, if the washer 7a having the shape as shown is placed under the nut 6, the connecting rebar 4 can be prevented from idling.

That is, the washer 7 a is fitted to the connecting reinforcing bar 4. For this reason, when the nut 6 is rotated by a spanner, the connecting rebar 4 rotates with the rotation, and the washer 7a tries to rotate simultaneously. When the washer 7a rotates, the stopper portion 132 of the washer 7a contacts the wall surface of the structural member 1a. As described above, the stopper 132 of the washer 7a abuts against the wall surface of the structural member 1a, whereby the rotation of the connecting rebar 4 is stopped.
7). Grouting material filling operation In the construction method to which the present invention is applied, the sleeves 31a and 31b are filled with the grout materials 8a and 8b, and the connecting rebar 4 and the sleeves 3a and 3b are fixed. The filling of the grout material into the sleeves 3a and 3b can be efficiently performed by using a grout material injector 50 as shown in FIG. The grout material injector 50 includes a hollow cylindrical portion 51 and an extrusion rod 53 that is slidably inserted into the hollow cylindrical portion 51. An injection portion 54 is formed at one end of the hollow cylindrical portion 51.

  When the grout material 55 is filled in the hollow cylindrical portion 51 and the extrusion trough 53 is moved in the direction of the arrow, the grout material 55 filled in the hollow cylindrical portion 51 flows out from the injection portion 54. Accordingly, if the injection portion 54 of the grout material injector 50 is fitted into the grout material insertion port 56 of the sleeve and the grout material 55 is moved in the direction of the arrow by the extrusion rod 53, the sleeve is efficiently filled with the grout material. Can do.

  As the grout material, mortar is used as described above. In the operation of filling the sleeve with the grout material, it is important to appropriately manage the mixing ratio of mortar and water. It is also important to properly manage the amount of grout material that fills the sleeve. If these are not properly managed, the desired strength cannot be obtained.

  If the grout material injector 50 described above is used, the amount of grout material filled in the sleeve can be appropriately managed. That is, if the scale 57 is described in the hollow cylindrical portion, the amount of the grout material filled in the sleeve can be known from the moving amount of the extrusion rod 53. Thereby, the quantity of the grout material with which a sleeve is filled can be managed.

  Further, as shown in FIG. 14, the mortar bags 60a and 60b, which are measured and sealed in advance, and the water bags 61a and 61b are packed so that the mixing ratio of mortar and water can be appropriately managed. It is possible to sell it. Thus, if the mortar bag and the water bag are packed and sold, it is not necessary to measure the amount of mortar and water at the site, and the mixing ratio of the mortar and water can be appropriately managed.

Further, as shown in FIG. 15, if the grout material injector 50, the mortar bags 60a and 60b, and the water bags 61a and 61b are packed and sold, the mixing ratio of mortar and water The amount of the grout material to be filled in the sleeve can be appropriately managed, and the grout material can be filled efficiently.
8). In the above example, the PCa structural member 1a and the PCa structural member 1b are connected vertically, but the operation of connecting the PCa structural member 1a and the PCa structural member 1b in the horizontal direction is the same as described above. Can be done.

This method of connecting the PCa structural member 1a and the PCa structural member 1b to the left and right is effective when, for example, the beam member 22 is connected between the column member 21a and the column member 21b as shown in FIG. It is. In the conventional PCa method, since the reinforcing bar protrudes from the connecting portion, it is difficult to use the precast method for the beam member between the column members. However, in the method to which the present invention is applied, the reinforcing bar is moved from the PCa structural member. The PCa structural member can be inserted between the members without protruding. For this reason, even when the beam member 22 is joined between the column member 21a and the column member 21b, the precast method can be adopted, and it is possible to build a structure using the precast method for all the members. become.
9. Waterproofing measures A waterproofing measure may be required in a building having a PCa structure. FIG. 17 shows a joining method in the case where such waterproof treatment is indispensable. As shown in FIG. 17, a seal material 32 is provided in a joint portion between the structural member 1 a and the structural member b in a portion where waterproofing is indispensable. Further, a sealing material 32 and a pressure-bonding gasket 33 are provided between the structural member 1a and the structural member 1b. Moreover, as shown in FIG. 18, the rubber packing 35 is provided in the inside.
10. Various PCa Parts Next, examples of various PCa parts of the PCa method to which the present invention is applied will be described. When the PCa construction method to which the present invention is applied is used, the PCa construction method can be adopted up to the portion where the conventional PCa construction method is impossible.

  19 to 21 show application examples when used as a vertical connection. FIG. 19A is an example used for joining the PCa wall 71 and the PCa wall 72. FIG. 19B is an example used for joining the PCa column 73 and the PCa column 74. FIG. 20A is an example used for joining the PCa beam 75 and the PCa wall 76. FIG. 20B is an example used for joining the PCa beam 77 and the PCa parapet 78. FIG. 21A is an example used for joining the PCa decorative column 79 and the conventional floor 80. FIG. 21B is an example used for joining the PCa handrail 81 and the PCa balcony 82.

22 to 25 show application examples when used as a horizontal connection. FIG. 22A shows an example used for joining the central portion of the PCa beam 83 and the PCa beam 84. FIG. 22B is an example used for joining the end portions of the PCa beam 85 and the PCa beam 86. FIG. 23A shows an example in which the PCa column 87 is used to join the PCa beam 88. FIG. 23B is an example used for joining the PCa balcony floor 89 and the PCa beam 90. FIG. 24A is an example used for joining the PCa staircase 91 and the PCa beam 92. FIG. 24B shows an example used for joining the PCa rod 93 and the PCa beam 94. FIG. 25A is an example used for joining the floor 95 and the beam 96. FIG. 25B is an example used when the PCa beam 99 is joined between the pillar 97 and the pillar 98. In addition, various parts can be realized by a construction method to which the present invention is applied.
11. Further, the PCa method to which the present invention is applied can also be used for attaching a sash. FIGS. 26-28 shows the example of attachment of a sash. As shown in FIG. 20, the PCa wall 151 is provided with a plurality of sash attachment portions 152, 152,. 21 is attached to the sash attachment portions 152, 152,...

  As shown in FIG. 27, the mounting bracket 161 includes a sleeve 162 and a connecting reinforcing bar 163 that is loosely inserted into the sleeve 162, and a nut 165 is attached to the end of the connecting reinforcing bar 163 via a washer 164. It is attached.

  As shown in FIG. 28, a sash 166 is disposed on the mounting bracket 161 via a sash mounting hardware 167. The sash mounting hardware 167 has a sleeve 169.

  When the sash 166 is disposed on the mounting bracket 161 via the sash mounting hardware 167, the nut 165 is rotated to move the connecting reinforcing bar 163 upward. When the connecting reinforcing bar 163 is moved into the mounting bracket 161 by a predetermined amount, the sleeve 162 and the sleeve 169 of the sash mounting hardware 167 are filled with grout. Thereby, the sash 166 is attached.

The method for attaching the sash is basically the same as the method for connecting the PCa structural members described above. In such a construction method, when the attachment fitting 161 is attached to the sash attachment portions 152, 152,..., The connecting reinforcing bars 163 do not protrude from the attachment fitting 161. For this reason, the operation | work which attaches the sash 166 to the PCa wall 151 can be performed smoothly.
12 PCa Curtain Wall Furthermore, the PCa construction method to which the present invention is applied can also be used to attach a curtain wall.

  In FIG. 29, the PCa curtain wall 201 is manufactured by pouring concrete into a predetermined formwork at a factory or the like. Joint portions 202 and 202 are integrally provided below the Pca curtain wall 201. Anchors 203, 203 protrude above the PCa curtain wall 201.

  FIG. 30 shows an outline of a PCa curtain wall mounting method to which the present invention is applied. In FIG. 30, reference numeral 210 denotes a lower beam member, and reference numeral 220 denotes an upper beam member. The beam member 210 and the beam member 220 are steel beam members made of, for example, H steel. A reinforced concrete flooring 211 is placed on the beam member 210. Joint blocks 204 and 204 are planted on the reinforced concrete flooring 211.

  When attaching the PCa curtain wall 201, the joint portions 202, 202 of the PCa curtain wall 201 are opposed to the joint blocks 204, 204 planted on the reinforced concrete flooring 211, and the joint portions 202, 202 and the joint block 204, 204. Further, the joint anchors 203 and 203 on the upper side of the PCa curtain wall 201 are fixed to the beam member 220 using the fixing members 221 and 221 and the L-shaped angles 222 and 222.

  FIG. 31 shows details of the lower fastener. In FIG. 31, a reinforced concrete flooring 211 is placed on a steel beam member 210.

  A sleeve 216 is disposed in the joint block 204. Grout filling ports 217 and 217 are formed in the sleeve 216. Further, from the upper end of the sleeve 216, a connecting reinforcing bar 214 having an outer diameter smaller than the inner diameter of the sleeve 216 is movably inserted. The connecting reinforcing bar 214 is a threaded deformed reinforcing bar.

  A sleeve 218 is disposed at the joint portion 202 of the PCa curtain wall 201. The inner diameter of the sleeve 218 is larger than the outer diameter of the connecting reinforcing bar 214. The sleeve 218 is formed with a urethane filling port 219.

  When the PCa curtain wall is fixed, the joint portion 202 of the curtain wall 201 is disposed on the joint block 204 so that the sleeve 216 and the sleeve 218 are opposed to each other. Then, the nut 213 is rotated in the direction in which the connecting reinforcing bar 214 is raised.

  When the nut 213 is rotated, the connecting reinforcing bar 214 moves upward along the sleeves 216 and 218. When the tip of the connection reinforcing bar 214 is inserted into the sleeve 218 by a predetermined amount, the grout material is filled into the sleeve 216 from the grout filling ports 217 and 217, and the connection reinforcing bar 214 is fixed to the sleeve 216. The sleeve 218 is not filled with the grout material, but is filled with the urethane material from the urethane filling port 219. Thereby, the interlayer displacement can be converted into the vertical direction, and the interlayer displacement can be absorbed by the locking method.

  The method for attaching the PCa curtain wall is basically the same as the method for connecting the PCa structural members described above. As described above, in such a construction method, the sleeve 216 is filled with the grout material, and the sleeve 218 is not filled with the grout material, but is filled with the urethane material from the urethane filling port 219, so that the locking method is used. There is an advantage that interlayer displacement can be absorbed.

  The present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the gist of the present invention.

  The present invention is applicable to, for example, precast concrete buildings such as low-rise and middle-high-rise buildings, as well as any precast concrete construction and civil engineering such as large dome and bridge.

It is sectional drawing which shows the basic construction method of this invention. It is sectional drawing which shows the basic construction method of this invention. It is sectional drawing which shows the basic construction method of this invention. It is sectional drawing which shows the basic construction method of this invention. It is sectional drawing used for description of the allowable attachment error by a conventional construction method. It is sectional drawing used for description of the allowable attachment error by the construction method to which this invention was applied. It is sectional drawing used for description of the example which provided the marker. It is sectional drawing used for description of the example which provided the stopper. It is sectional drawing used for description of the example which provided the marker and the stopper. It is a top view of an example of the jig | tool which prevents idling of a connection reinforcement. It is a top view of the other example of the jig | tool which prevents idling of a connection reinforcing bar. It is sectional drawing used for description of the washer which prevents idling of a connection reinforcing bar. It is sectional drawing of an example of a grout material injection device. It is explanatory drawing of the package of a grout material. It is explanatory drawing of the package of a grout material. It is explanatory drawing of the connection of the horizontal direction by the basic construction method of this invention. It is sectional drawing used for description of the waterproofing measure by the construction method to which this invention was applied. It is sectional drawing used for description of the waterproofing measure by the construction method to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the precast concrete component to which this invention was applied. It is explanatory drawing of the sash attachment method to which this invention was applied. It is sectional drawing used for description of the sash attachment method to which this invention was applied. It is sectional drawing used for description of the sash attachment method to which this invention was applied. It is explanatory drawing of the curtain wall attachment method to which this invention was applied. It is explanatory drawing of the curtain wall attachment method to which this invention was applied. It is side surface sectional drawing and front view used for description of the curtain wall mounting method to which this invention was applied. It is sectional drawing used for description of the connection method of the conventional precast concrete. It is explanatory drawing of the problem of the connection method of the conventional precast concrete.

Explanation of symbols

1a, 1b Structural member 2a, 2b Reinforcing bar 3a, 3b Sleeve 4 Connecting rebar 5a, 5b, 5c, 5d Grout filling port 6 Nut 7 Washer 8a, 8b Grout material 11 Marker 12 Stopper 32 Seal material 33 Crimp gasket 35 Rubber packing 50 Grout Material injector 152 Sash mounting portion 161 Mounting bracket 162 Sleeve 163 Connecting rebar 165 Nut 166 Sash 167 Sash mounting hardware 169 Sleeve 201 Curtain wall 202 Joint portion 203 Anchor 204 Joint block 210 Beam member 211 Reinforced concrete flooring 212 Sleeve 213 Nut 214 Connecting rebar 216 Sleeve 217 Grout filling port 218 Sleeve 219 Urethane filling port 220 Beam member

Claims (9)

A precast concrete member coupling method for connecting a first precast concrete structural member and a second precast concrete structural member,
A sleeve member is provided in advance on the first and second precast concrete structural members, and a connecting rebar threaded on the sleeve member of the first structural member is movably inserted, and a nut is attached to the tip of the connecting rebar. Screwed together,
The sleeve member of the structural member of the first precast concrete and the sleeve member of the structural member of the second precast concrete are arranged to face each other,
Moving the connecting rebar from the sleeve member of the first precast concrete structural member toward the sleeve member of the second precast concrete structural member by rotating the nut;
When the connecting reinforcing bar is moved by a predetermined amount into the sleeve member of the second structural member, the grout material is filled and fixed to at least one of the first and second structural members. A method for joining precast concrete members, characterized in that: The method for connecting precast concrete members according to claim 1, wherein a marker indicating the amount of movement of the connecting reinforcing bars is added to the connecting reinforcing bars. The method for joining precast concrete members according to claim 1, wherein a stopper indicating the amount of movement of the connecting reinforcing bars is added to the connecting reinforcing bars. A jig having a reinforcing bar fixing portion having a shape corresponding to the connecting reinforcing bar is provided, the reinforcing bar fixing portion of the jig is fitted to the connecting reinforcing bar, and the connecting rebar is rotated when the nut is rotated. The method for joining precast concrete members according to claim 1, wherein: 2. The precast concrete member according to claim 1, wherein a stopper portion is provided on the washer of the connecting reinforcing bar, and the idling of the connecting reinforcing bar is prevented by the stopper portion of the washer when the nut is rotated. How to join. The method for joining precast concrete members according to claim 1, wherein waterproofing is applied to a joint between the structural member of the first precast concrete and the second precast concrete. A method of joining precast concrete members for attaching a sash to a structural member of precast concrete,
A sleeve member is attached in advance to the structural member of the precast concrete, a connecting rebar threaded on the sleeve member is movably inserted, and a nut is screwed onto a tip of the connecting rebar,
Arranged so that the sleeve member attached to the structural member of the precast concrete and the attachment hardware of the sash face each other,
The connecting rebar is moved from the sleeve member attached to the structural member of the precast concrete by rotating the nut toward the fitting of the sash,
A method for joining precast concrete members, wherein a grout material is filled and fixed to a sleeve member of the structural member when the connecting rebar is moved by a predetermined amount to the fitting of the sash. A precast concrete joining method for attaching a precast concrete wall member to a precast concrete structural member,
A sleeve member is provided in advance on the precast concrete structural member and the precast concrete wall member, and a connecting rebar threaded on the sleeve member of the precast concrete structural member is movably inserted, and a nut is provided at the end of the connecting rebar. Screwed in,
Arranging the sleeve member of the structural member of the precast concrete and the wall member of the precast concrete so that the sleeve members face each other;
The connecting rebar is moved from the sleeve member of the structural member of the precast concrete member toward the sleeve member of the wall member of the precast concrete by rotating the nut,
When the connecting rebar is moved to the precast concrete wall member by a predetermined amount, one of the structural member of the precast concrete or the sleeve member of the precast concrete is filled with a grout material and fixed. A method for joining precast concrete members. 9. The method of connecting precast concrete members according to claim 8, wherein the other sleeve member of the precast concrete structural member or the precast concrete wall member is filled with a urethane material.

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