JP2018109313A - Prefabricated structure construction method and prefabricated structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a prefabricated structure construction method with which a prefabricated structure can be easily transported and constructed.SOLUTION: A prefabricated structure 1 comprises a plurality of units 10 connected together. The unit 10 comprises upper and lower main steel members 11 and 12 arranged approximately in parallel vertically, and a connecting member 13 which connects the upper and lower main steel members 11 and 12. An embedded form 14 is connected to the main steel member 12. The upper side main steel member 11 is shorter than the lower side main steel member 12. The adjoining units 10 are connected such that they can be turned relatively to each other in the plane along the axial direction of the upper and lower main steel members 11 and 12. The prefabricated structure 1 can be spread from a state in which the units 10 are wound into a rolled-up shape to a state in which the units 10 are arranged in a straight line, thus, allowing bulk construction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a prefabricated construction method and a prefabricated structure.

  When constructing concrete structures such as top plates, slabs, beams, etc., reinforcing bars, formwork, and concrete before hardening may be supported by a support work.

  In such a case, for the purpose of omitting the support work, use a prefabricated structure with a composite half precast member with increased bending strength and rigidity by combining steel materials, truss bars, etc. and a buried formwork made of concrete precast member. (For example, Patent Documents 1 and 2).

  Patent Document 3 describes a prefabricated formwork unit in which a floor slab reinforcement that can be folded is attached in advance to an embedded formwork for a floor slab.

Japanese Patent Laid-Open No. 8-134841 JP-A-6-306987 Japanese Patent No.2662373

  Such a prefabricated structure is installed after having been pre-manufactured at a factory, etc., but it is installed on the site. I can't. In addition, there are many temporary materials such as earth retaining and cutting beams at the excavation site, and it is often difficult to construct a large-scale prefabricated structure in it.

  If transportation and installation are difficult in this way, it is possible to divide the prefabricated structure into appropriate sizes for transportation and installation, but it is necessary to join the divided members at the time of installation, and workability is improved. descend. In Patent Document 3, the reinforcement of the formwork unit can be folded and made compact, and a plurality of formwork units can be stacked and transported. However, when constructing a large-scale structure, it is necessary to join a plurality of formwork units at the time of installation. These problems can also be said when pre-fabricating a reinforcing steel material for a concrete structure in advance. That is, when the member scale is increased, it becomes difficult to carry and erection even if it is prefabricated.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a prefabricated construction method and the like that facilitate the transportation and construction of the prefabricated structure.

  1st invention for solving the subject mentioned above is the construction method of the prefabricated structure used at the time of construction of a concrete structure, Comprising: The upper and lower main steel materials arrange | positioned substantially parallel, and the said upper and lower main steel materials are connected A prefabricated structure in which a plurality of units having a connecting steel material are connected so as to be relatively rotatable in a plane along the axial direction of the upper and lower main steel materials. A prefabricated construction method characterized in that the prefabricated structure is expanded and arranged.

  According to the present invention, a long prefabricated structure connected with a unit having a steel material used for reinforcement of a formwork or a concrete structure is deformed into a roll shape to be compact, and from this state, it is developed in a straight line shape. Prefabricated structure can be installed all at once. Therefore, the transportation and installation of the prefabricated structure can be made more efficient, the labor of joining the units at the time of installation can be omitted, and the space for storage, transportation and temporary placement can be reduced. Further, high rigidity can be imparted to the prefabricated structure by the upper and lower main steel materials and the connecting steel materials connecting them.

It is desirable that a mold is connected to the main steel material.
By connecting the formwork to the main steel material, the formwork can be arranged at the same time when the prefabricated structure is installed, and the support work can be omitted.

The upper main steel material is shorter than the lower main steel material, and it is desirable that the upper main steel material of each unit is connected by a steel material after the units are developed in a straight line.
Since the upper main steel material is shorter than the lower main steel material, the prefabricated structure can be wound up smaller, and the upper main steel material of each unit is connected with the steel material after the development of the prefabricated structure. When the upper and lower main steel members and the connecting steel materials are integrally resisted against bending, for example, when a formwork is connected to the main steel material, it is possible to omit support work at the time of erection and concrete placement. For this reason, field work is reduced, which contributes to labor saving and shortening the construction period.

When the unit is deployed, it is desirable to hold one end of the prefabricated structure and suspend another portion of the prefabricated structure with a suspension material and move it in the deploying direction.
Thereby, the prefabricated structure can be easily developed with a simple configuration. In this case, since it can be easily deployed by a general-purpose machine such as a trolley, the construction period and artificiality of the erection work can be reduced.

The prefabricated structure has an arc shape of a semi-circle or less when the unit is wound in a roll shape, the unit is deployed by its own weight, and the deployment speed of the unit is adjusted by the tension of the wire when the unit is deployed. Is desirable.
As described above, when the prefabricated structure has a semicircular arc shape when rolled into a roll shape, the prefabricated structure can be developed by its own weight. Also in this case, the prefabricated structure can be easily installed, and workability and safety can be improved by adjusting the deployment speed of the prefabricated structure by the tension of the wire rod.

The mold is preferably a concrete precast member.
A precast member made of concrete is used for the formwork, and it can be used as an embedded formwork for a concrete structure. In this case, it is not necessary to place concrete after assembling the formwork, wait for expression of the concrete strength, remove the formwork and disassemble the formwork.

The connecting steel material is preferably arranged in a truss shape between the upper and lower main steel materials.
By arranging the connecting steel materials in a truss shape, the rigidity of the prefabricated structure is improved.

In addition, when the unit is deployed, it is desirable that the development is stopped in a state where the adjacent units abut each other and the units are arranged in a straight line.
As described above, the development of the prefabricated structure is facilitated by restraining the development in a state where the main steel materials and the molds of the adjacent units abut each other and the units are arranged in a straight line.

Before the unit is deployed, it is desirable to temporarily fix the unit in a roll shape by a temporary fixing mechanism.
Thereby, storage of a prefabricated structure, transportation, etc. can be performed suitably.

2nd invention is a prefabricated structure used at the time of construction of a concrete structure, Comprising: The unit which has the upper and lower main steel materials arrange | positioned substantially in parallel, and the connection steel materials which connect the said upper and lower main steel materials, is upper and lower A prefabricated structure in which a plurality of main steel members are connected so as to be relatively rotatable in a plane along the axial direction.
Moreover, it is desirable that a mold is connected to the main steel material.

  According to the present invention, it is possible to provide a prefabricated construction method and the like that facilitate the transportation and construction of the prefabricated structure.

The figure which shows the outline of the prefabricated structure 1. FIG. The figure which shows the unit 10. FIG. The figure which shows the connection part 15. FIG. The figure which shows the state which made the prefabricated structure 1 roll shape. The figure shown about expansion | deployment of the prefabricated structure 1. FIG. The figure shown about construction of the prefabricated structure 1 and concrete placement. The figure shown about expansion | deployment of the prefabricated structure 1. FIG. The figure which shows the connection part 15a. The figure which shows the connection part 15b. The figure which shows the connection part 15a and the bellows part 18. FIG. The figure which shows the connection part 15c. The figure which shows the reinforcing bar 70 and the steel wire material 70a.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]
(1. Prefabricated structure 1)
FIG. 1 is a diagram showing an outline of a prefabricated structure 1 according to a first embodiment of the present invention. The prefabricated structure 1 of this embodiment is configured by connecting a plurality of units 10 as shown in FIG.

  2A is a view showing the unit 10, and FIG. 2B is a view of the unit 10 shown in FIG. 2A viewed from the side. The unit 10 is configured as a prefabricated member in which steel materials are pre-assembled, and a buried formwork made of a concrete precast member is connected to the steel materials.

  The unit 10 includes upper and lower main steel materials 11 and 12 and a connecting steel material 13 as steel materials. An embedded form 14 is connected to the lower main steel material 12. Concrete structures such as top plates, slabs and beams are constructed by placing concrete on the embedded formwork 14.

  The upper and lower main steel materials 11, 12 are connected by a connecting steel material 13, and they are integrated to constitute a unit 10, whereby high rigidity is imparted to the prefabricated structure 1.

  The main steel materials 11 and 12 are arranged substantially parallel in the vertical direction. For the main steel materials 11 and 12, shape steel such as CT shape steel is used. Further, in the prefabricated structure 1 of the present embodiment, as will be described later, the upper main steel material 11 is shorter than the lower main steel material 12 because the unit 10 is wound in a roll shape.

  The connecting steel material 13 connects the upper and lower main steel materials 11 and 12, and a shaped steel such as an L-shaped steel is used. The connecting steel material 13 is arranged in a truss shape between the main steel materials 11 and 12, and has a structure that can ensure high rigidity.

  The embedded form 14 is connected to the lower main steel material 12 through the channel material 17. A concrete precast member is used for the embedded formwork 14 and the upper and lower sides of the channel material 17 are connected to the flange 121 of the lower main steel material 12 and the insert (not shown) of the embedded formwork 14 using bolts or the like. Thus, the embedded form 14 is connected to the main steel material 12. By placing the lower main steel material 12 on the channel material 17 and installing it, the concrete described above is filled around the lower main steel material 12, which is advantageous in ensuring the integrity of both. . However, the connection method of the embedded form 14 is not particularly limited. For example, the embedded form 14 can be directly connected to the flange 121, or the lower portion of the main steel material 12 can be embedded in the concrete of the embedded form 14. is there.

  In the unit 10, a reinforcing bar 20 is also disposed on the lower main steel material 12 as a power distribution steel material in a direction substantially orthogonal to the main steel materials 11 and 12 in a plane. The reinforcing bar 20 is arranged by passing the reinforcing bar through the hole 120 of the main steel material 12. As shown in FIG. 2 (b), a plurality of units 10 are arranged side by side in a direction substantially orthogonal to the main steel materials 11, 12, and the reinforcing bars 20 connect these units 10 before the prefabricated structure 1 is installed. It is possible to save labor in the on-site bar arrangement work. However, it is also possible to arrange the prefabricated structure 1 after the construction. It is also possible to dispose the reinforcing bars 20 in the same manner on the upper main steel material 11.

  As shown to Fig.2 (a), the some unit 10 adjacent to the axial direction of the main steel materials 11 and 12 is the surface along the axial direction of the upper and lower main steel materials 11 and 12 in the connection part 15 (FIG. 2 ( Corresponding to the surface shown in a), it is connected so as to be relatively rotatable.

  FIG. 3A is a diagram showing the connection portion 15. As shown in FIG. 3A, in the connection portion 15, a receiving plate 151 is provided on the upper edge of the opposite end portion of the main steel material 12 of the adjacent units 10. A base 152 is installed on the receiving plate 151, and a mounting portion 153 to which one end of the arm 154 is attached is provided on the base 152. The other ends of the arms 154 extending from the attachment portions 153 of the both main steel materials 12 are connected between the both main steel materials 12 by the hinges 155.

  With such a configuration of the connecting portion 15, both units 10 can be relatively rotated around the position of the hinge 155 as shown in FIG.

  In the present embodiment, the slide portion 16 that slides with the relative rotation of the unit 10 is also provided between the main steel materials 12.

  In the slide portion 16, an attachment portion 161 in which one end of the arm 164 is rotatably attached is provided at the lower edge of the end portion of the main steel material 12 of one unit 10 (left unit 10 in the example of FIG. 3). The other end of the arm 164 is rotatably connected to a slider 162 provided on the main steel material 12 of the other unit 10 (right unit 10 in the example of FIG. 3). The main steel material 12 is provided with a long hole 163 in the member axial direction, and the slider 162 is disposed in the long hole 163, and as the unit 10 rotates relative to the main steel material 12 as shown in FIGS. Thus, the inside of the elongated hole 163 can be moved in the member axial direction of the main steel material 12. The rotation range of the unit 10 can be regulated by the long hole 163.

  In the prefabricated structure 1, as shown in FIG. 4A, the units 10 are arranged in a straight line as shown in FIG. 1 by relatively rotating adjacent units 10 as shown in FIG. 3B. It is set as the state wound in the roll shape, and the unit 10 adjacent is temporarily fixed using a temporary fixing mechanism as needed, and the state which became the roll shape is hold | maintained. As the temporary fixing mechanism, for example, as shown in FIG. 4B, a connector 21 that connects the main steel materials 11 on the upper side of the adjacent units 10 can be used.

(2. Construction of prefabricated structure 1 and construction of concrete structure)
Next, a procedure for constructing a concrete structure by laying the prefabricated structure 1 will be described.

  The prefabricated structure 1 is manufactured in a factory, a production yard, or the like, and is wound in a roll shape as shown in FIG. 4A so as to be easily stored and transported. At the time of construction of a concrete structure, the prefabricated structure 1 in this state is transported and carried to the site, and is expanded and installed in a straight line. In the case where the prefabricated structure 1 is large-scale, it is possible to transport the unit 10 unit and carry it in the field, and assemble the prefabricated structure 1 in a roll shape on site before erection.

  When the prefabricated structure 1 is unfolded, as shown in FIG. 5 (a), one end of the prefabricated structure 1 is held by the holder 25, and another part of the prefabricated structure 1, that is, the prefabricated structure 1 in this embodiment The end and the intermediate portion are supported by being suspended from a trolley 31 provided on the rail 30 by a chain 32 (suspending material).

  When the unit 10 is temporarily fixed, the unit 10 is released, and as shown in FIG. 5 (b), the other end and the middle part of the prefabricated structure 1 are moved in the unfolding direction of the prefabricated structure 1 (FIG. 5 (b) ) To the right)). When the prefabricated structure 1 is deployed, operations such as raising and lowering and removing the chain 32 are appropriately performed.

  In the present embodiment, the prefabricated structure 1 is thus developed, and the main steel members 12 and the embedded molds 14 of the adjacent units 10 abut each other as shown in FIG. Stops deployment.

  Thereafter, as shown in FIG. 6A, the steel material 40 is attached to the upper main steel material 11 of each unit 10, and the main steel material 11 is connected by the steel material 40, thereby completing the installation of the prefabricated structure 1. As shown in FIG. 6B, a concrete structure such as a top plate is constructed by placing concrete 50 on the embedded form 14 of the unit 10. In this example, the embedded form 14 of the prefabricated structure 1 is arranged in a substantially horizontal direction to construct a concrete structure such as a top plate, but the embedded form 14 (prefabricated structure 1) is arranged in a substantially vertical direction. It is also possible to construct a wall-like concrete structure.

  In the prefabricated structure 1, the upper and lower main steel materials 11 and 12, the connecting steel material 13, the steel material 40, and the like of each unit 10 are provided with high rigidity that can replace the support work during the construction of the prefabricated structure 1 and the concrete placement. Work can be omitted. In addition, by considering these steel materials as structural steel materials in a complete system of a concrete structure, it is possible to omit other bar arrangement work. If necessary, a simple support work can be temporarily used when the prefabricated structure 1 is installed.

  As described above, according to the present embodiment, the long prefabricated structure 1 connected with the unit 10 having a steel material used for reinforcement of a formwork or a concrete structure is deformed into a roll shape to be compact, From this state, the prefabricated structure 1 can be installed in a lump by extending straight. Therefore, the transportation and installation of the prefabricated structure 1 can be made more efficient, the labor for joining the units 10 during the installation can be omitted, and the space for storage, transportation and temporary placement can be reduced. Moreover, high rigidity can be provided to the prefabricated structure by the upper and lower main steel materials 11 and 12 and the connecting steel material 13 connecting them.

  Moreover, since the upper main steel material 11 is shorter than the lower main steel material 12, the prefabricated structure 1 can be wound up smaller. The upper and lower main steel materials 11 and 12 can have the same length, and the upper main steel materials 11 of adjacent units 10 can be connected to each other by the connecting portion 15 as described above. There is a drawback that the outer diameter becomes large when rolled up into a roll.

  In the present embodiment, by connecting the embedded form 14 to the main steel material 12 of the prefabricated structure 1, the embedded form 14 can be disposed at the same time when the prefabricated structure 1 is installed. Moreover, the main steel material 11 on the upper side of each unit 10 is connected by the steel material 40 after the development of the prefabricated structure 1, so that the steel material 40 and the upper and lower main steel materials 11, 12 and the connecting steel material 13 of the unit 10 are not bent. It resists as a unit, and support work during erection and concrete placement can be omitted. For this reason, field work is reduced, which contributes to labor saving and shortening the construction period. Further, by considering these steel materials as structural steel materials for concrete structures, it is possible to omit the bar arrangement work.

  Deployment of the prefabricated structure 1 can be easily performed by holding one end of the prefabricated structure 1 and suspending another portion of the prefabricated structure 1 with a suspension material such as a chain 32 and moving it in the deployment direction. In this case, since it can be deployed by a general-purpose machine such as the trolley 31, the construction period and artificiality of the erection work can be reduced. In addition to the trolley 31, it is also possible to use a general crane or a portal crane for deployment.

  Moreover, the formwork is the embedded formwork 14 made of a concrete precast member, and after assembling the formwork, the concrete is cast, and the work of demolding and disassembling the formwork after waiting for the concrete strength to be developed becomes unnecessary. . However, the mold may be a temporary one that is removed after placing the concrete, and in this case, a steel plate or the like may be used for the mold. It is also possible to omit the formwork in the prefabricated structure 1 and separately support the formwork with a support work or the like when placing concrete. This formwork may be a buried formwork or a temporary formwork. Also in this case, the effect of omitting the bar arrangement work by the prefabricated structure can be expected.

  Moreover, in this embodiment, the rigidity of the prefabricated structure 1 is improved by arranging the connecting steel members 13 in a truss shape. However, the arrangement of the connection steel material 13 is not limited to this, and for example, the connection steel material 13 may be arranged in a substantially vertical direction between the upper and lower main steel materials 11 and 12.

  In the present embodiment, the prefabricated structure 1 can be suitably stored, transported, and the like by fixing the unit 10 in a roll shape using the connector 21 or the like. Moreover, when developing from the roll state, the main steel material 12 and the embedded formwork 14 of the adjacent units 10 abut against each other, and the development is constrained in a state where the units 10 are arranged in a straight line. Is easy to install.

  However, the present invention is not limited to this. Hereinafter, another example of the present invention will be described as second and third embodiments. Each embodiment will be described with respect to differences from the first embodiment, and the same points will be denoted by the same reference numerals in the drawings and the like, and description thereof will be omitted. In addition, the configurations described in each embodiment including the first embodiment can be used in combination as necessary.

[Second Embodiment]
As a second embodiment, an example in which the deployment method of the prefabricated structure 1 is different will be described.

  In 2nd Embodiment, as shown in FIG. 7, the prefabricated structure 1 which became the circular arc shape of the semicircle or less in the state wound by roll shape is expand | deployed with the dead weight.

  In the present embodiment, the wire 33 (wire material) is used as an adjustment mechanism for adjusting the deployment speed of the prefabricated structure 1 when the prefabricated structure 1 is deployed. That is, the wire 33 suspended from the trolley 31 is passed through the pulley 34 from one end of the prefabricated structure 1 to the upper and lower main steel materials 11 and 12 of each unit 10, and along the main steel materials 11 and 12 of each unit 10. It arrange | positions and it fixes to the main steel materials 11 and 12 of the unit 10 of the other end.

  The prefabricated structure 1 tries to deploy in the deploying direction (corresponding to the right direction in FIG. 7) by its own weight, but by applying tension to the wire 33 passed through the upper main steel material 11, the shape of the prefabricated structure 1 is changed. It can be fixed in an arc shape.

  When the tension of the wire 33 is loosened, the prefabricated structure 1 is deployed by its own weight. At this time, the deployment speed of the prefabricated structure 1 can be adjusted by adjusting the tension of the wire 33 that has passed through the main steel materials 11 and 12. When the wire 33 passed through the main steel material 11 is tensioned, the development of the prefabricated structure 1 is stopped. On the other hand, when the wire 33 passed through the main steel material 12 is tensioned, the development of the prefabricated structure 1 can be promoted, and these wires 33 are pushed and pulled. With this, the deployment speed of the prefabricated structure 1 can be adjusted.

  By performing the deployment in this way, the construction work of the prefabricated structure 1 is facilitated similarly to the first embodiment, and the work is performed by adjusting the deployment speed of the prefabricated structure 1 by the tension of the wire material such as the wire 33. Improve safety and safety. For the wire control, a general crane other than the above-described configuration may be used, or a portal crane installed on the upper part of the member may be used. FIG. 7 shows a method of controlling the wire 33 from the upper part of the member via the pulley 34. However, it may be controlled by installing a winch or the like at a point where the wire 33 is extended in a substantially horizontal direction.

  In addition to this, there are various methods for developing the prefabricated structure 1. For example, in the case of FIG. 7, the wire 33 that passes through the lower main steel material 12 can be omitted. Further, a wire 10 such as a wire is attached to the other end of the prefabricated structure 1 while holding one end of the prefabricated structure 1, and the unit 10 is fixed in a roll shape by pulling the one end side of the prefabricated structure 1. A method of deploying the prefabricated structure 1 by loosening is also possible.

[Third embodiment]
As the third embodiment, an example in which the configuration of the connecting portion between adjacent units is different will be described.

  For example, in the connection part 15a of FIG. 8A, the base 152 is installed on the flange 121 on the lower edge of the opposite end of the main steel material 12a of the adjacent unit 10a, and one end of the arm 154 is attached. 153 is provided on the base 152. The arms 154 extending from the attachment portions 153 of the two main steel materials 12a are connected by a hinge 155 between the main steel materials 12a of the adjacent units 10a. Moreover, the notch 122 notched diagonally is provided in the edge part of the main steel material 12a so that the relative rotation of the unit 10a may not be inhibited.

  Also in this case, the adjacent units 10a around the hinge 155 of the connecting portion 15a can be relatively rotated as shown in FIG. 8B to deform the prefabricated structure into a roll shape.

  When the prefabricated structure is erected, the prefabricated structure is expanded linearly as described above. At this time, as shown in FIG. The deployment stops in a state where they are arranged in a straight line, and then the connecting plate 60 is disposed between the main steel members 12a and rigidly connected to both the main steel members 12a using bolts or the like, so that the units 10a are arranged in a straight line. It is fixed in the state.

  On the other hand, in the connection part 15b of FIG. 9A, the base 152 is installed under the flange 121 at the lower edge of the opposite end of the main steel material 12a of the adjacent unit 10b, and one end of the arm 154 is attached. A portion 153 is provided on the base 152. The arms 154 extending from the attachment portions 153 of both main steel materials 12a are connected by hinges 155 between the main steel materials 12a of the adjacent units 10b.

  Also in this case, the adjacent units 10b around the hinge 155 of the connecting portion 15b can be relatively rotated as shown in FIG. 9A to deform the prefabricated structure into a roll. Even in this prefabricated structure, the embedded form 14 is connected to the main steel material 12a, and when deployed, as shown in FIG. 9B, the embedded forms 14 of adjacent units 10b are abutted with each other so that the units 10b are arranged in a straight line. In this state, the deployment of the prefabricated structure stops.

  Moreover, in the example of the left figure of Fig.10 (a), while providing the connection part 15a similar to FIG. 8, the webs of the main steel material 12a of the adjacent unit 10c are connected by the bellows part 18. FIG. The right figure of Fig.10 (a) is what looked at the bellows part 18 from the top, and as shown in the figure, the bellows part 18 is comprised by connecting plate materials 181, such as a steel plate, with hinges 182.

  As shown in FIG. 10A, the bellows portion 18 is folded when the units 10c are rotated relative to each other about the hinge 155, but the prefabricated structure is developed, as shown in the left diagram of FIG. 10B. When the embedded molds 14 of the units 10c adjacent to each other are brought into contact with each other and the units 10c are arranged in a straight line, the bellows portion 18 expands as shown in the right view of FIG. Are arranged side by side on a plane and fixed in that state.

  Further, as shown in FIG. 11, the units 10d may be connected to each other by a connecting portion 15c using a simple hinge mechanism. In the connection part 15c, the bracket 156 is installed in the opposing edge part of the main steel material 12 of the adjacent unit 10d, and brackets 156 are connected with the hinge 158. FIG. Also in this case, the units 10d can be relatively rotated around the hinge 158, and the prefabricated structure can be deformed into a roll shape. Further, when the prefabricated structure is deployed, the embedded formwork 14 of the adjacent units 10d are abutted with each other, and the development of the prefabricated structure is stopped in a state where the units 10d are arranged in a straight line.

  Furthermore, the unit 10d is arranged in a straight line by providing the reinforcing bars 70 (steel materials) along the axial direction of the main steel material 12 so as to straddle the connecting portions 15c of the adjacent units 10d as shown in FIG. The strength and rigidity of the prefabricated structure can be increased. In this example, as shown in FIG. 12B, the reinforcing bars 70 are fixed to the flange 121 on both sides of the web of the main steel material 12 using the fixing tool 71, but the fixing means is not limited to this.

  Moreover, as shown in FIG.12 (c), it replaces with the reinforcing bar 70, and by using the flexible steel wire material 70a (steel material) which twisted the wire etc., it does not prevent the deformation | transformation of a prefabricated structure. It can also be installed before the construction of the structure. In the example of FIGS. 12A to 12C, the reinforcing bar 70 and the steel wire material 70a are used for fixing the unit 10d described in FIG. 11, but any of the above-described units 10, 10a, 10b, and 10c is the above. Can be fixed using the same reinforcing bar 70 and steel wire material 70a.

  8 to 12 also facilitates the construction work of the prefabricated structure as in the first embodiment. The structure can be appropriately selected in consideration of workability and the like.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1: Prefabricated structure 10, 10a, 10b, 10c, 10d: Units 11, 12, 12a: Main steel material 13: Connection steel material 14: Embedded formwork 15, 15a, 15b, 15c: Connection part 16: Slide part 17: Channel material 18: Bellows 20, 70: Reinforcing bar 21: Connecting tool 25: Holding tool 30: Rail 31: Trolley 32: Chain 33: Wire 34: Pulley 40: Steel material 50: Concrete 60: Connecting plate 70a: Steel wire material 71: Fixture

Claims (11)

A prefabricated construction method used when building a concrete structure,
Upper and lower main steel materials arranged substantially in parallel;
Connecting steel material for connecting the upper and lower main steel materials;
A prefabricated structure in which a plurality of units are connected to each other so as to be relatively rotatable in a plane along the axial direction of the upper and lower main steel materials,
A prefabricated construction method characterized in that the unit is unfolded and arranged in a straight line from a rolled state.   The prefabricated construction method according to claim 1, wherein a formwork is connected to the main steel material. The upper main steel material is shorter than the lower main steel material,
3. The prefabricated construction method according to claim 1, wherein the main steel material on the upper side of each unit is connected by a steel material after the units are linearly developed.   The one end of the said prefabricated structure is hold | maintained at the time of the expansion | deployment of the said unit, The other part of the said prefabricated structure is suspended with a suspension material, and is moved to a deployment direction. How to install prefabricated structure. The prefabricated structure becomes an arc shape of a semicircle or less when the unit is wound in a roll shape,
Unfold the unit by its own weight,
The construction method of the prefabricated structure according to any one of claims 1 to 3, wherein when the unit is deployed, the deployment speed of the unit is adjusted by the tension of the wire.   3. The prefabricated construction method according to claim 2, wherein the mold is a concrete precast member.   The prefabricated construction method according to any one of claims 1 to 6, wherein the connection steel material is arranged in a truss shape between the upper and lower main steel materials.   8. The prefabricated structure according to claim 1, wherein when the units are deployed, the adjacent units abut each other and the development stops in a state where the units are arranged in a straight line. Method.   The prefabricated construction method according to any one of claims 1 to 8, wherein the unit is temporarily fixed in a state of being rolled by a temporary fixing mechanism before the unit is deployed. A prefabricated structure used when building a concrete structure,
Upper and lower main steel materials arranged substantially in parallel;
Connecting steel material for connecting the upper and lower main steel materials;
A prefabricated structure comprising a plurality of units connected to each other so as to be relatively rotatable within a plane along the axial direction of the upper and lower main steel members.   The prefabricated structure according to claim 10, wherein a formwork is connected to the main steel material.

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