JP6922130B2 - Construction method of steel materials on the outer wall of a building - Google Patents

Description

The present invention relates to a method of constructing a steel material on an outer wall of a building.

Conventionally, it has been known that a brace material is fixed to the outer wall of a building to improve earthquake resistance. For example, a brace material made of a steel material is fixed to a joint portion between a column and a beam (see Patent Document 1 below). Generally, a truck crane or the like is installed at a construction site, the brace material is lifted by the truck crane and moved to a predetermined place, and the brace material is assembled by welding or the like and fixed to the building.

JP-A-2002-146905

However, in a narrow area where other buildings or railroad tracks are close to the side where the brace material is fixed in the building, it is possible to secure a place to install a lifting machine such as a mobile truck crane. There is a problem that it cannot be done. In addition, it is difficult to perform welding when assembling the brace material at the construction site, and there is a problem that the construction cannot be performed with high accuracy.

Therefore, the present invention has been made in view of the above circumstances, and provides a method for constructing a steel material on an outer wall of a building, which can be constructed with good workability and accuracy even in a narrow area.

In order to achieve the above object, the present invention employs the following means.
That is, the method of constructing a steel material on the outer wall of a building according to the present invention is a construction method of fixing a steel material unit formed by assembling a plurality of steel materials to the outer wall of a building using a jig. A crane installation step of installing a hoist crane capable of laterally and vertically moving along an outer wall, an assembly step of attaching the steel unit to the jig, and suspending and laterally moving the jig to the hoist crane. A moving step of lifting the jig to a fixed position and arranging the jig to which the steel unit is attached along the wall surface of the pillar of the building, and a temporary fixing by screwing the bolt into the bolt hole of the jig and temporarily fixing it to the pillar. It is characterized by including a stopping process.

In the method of constructing the steel material on the outer wall of the building configured in this way, the steel material unit attached to the jig is arranged at a predetermined position by temporarily fixing the jig to the outer wall of the building. Further, since the steel material unit is constructed by assembling the steel material in advance, each steel material is arranged and constructed at a predetermined position with high dimensional accuracy.
Further, the steel material unit, that is, the steel material can be easily positioned, and the steel material does not need to be assembled by welding or the like at the fixing place of the steel material to the building, so that the workability can be improved.
In addition, when arranging the steel unit at a predetermined position in the building, the jig may be suspended and laterally moved by a laterally movable crane that can move laterally along the outer wall of the building. It is possible to work even in a narrow area where the distance between the adjacent existing structure is narrow.

Further, in the method of constructing a steel material on the outer wall of a building according to the present invention, it is preferable to assemble the steel material unit while assembling the steel material to the jig in the assembly step.

In the method of constructing steel materials on the outer wall of a building constructed in this way, since the steel material unit is assembled while assembling the steel materials to the jig in the assembly process, each steel material should be installed with high dimensional accuracy based on the jig. Can be done.

Further, in the method of constructing a steel material on an outer wall of a building according to the present invention, in the assembly process, the jig may be attached to the steel material unit after the steel material is assembled to form the steel material unit.

In the method of constructing the steel material on the outer wall of the building constructed in this way, in the assembly process, the steel material is assembled to form the steel material unit, and then the jig is attached to the steel material unit. Can be installed well.

Further, in the method of constructing a steel material on the outer wall of a building according to the present invention, the steel material unit is provided with an anchor, and a grout material is filled between the outer wall and the steel material unit to form the anchor. It is preferable to further include a grout material filling step for fixing the above.

In the method of constructing the steel material on the outer wall of the building configured in this way, by filling the grout material between the steel material unit and the outer wall of the building, the anchor provided on the steel material unit is fixed and the steel material is fixed. The unit is fixed to the outer wall of the building. Therefore, the steel material can be easily fixed to the outer wall of the building.

Further, in the construction method of a steel material to the outer wall of a building according to the present invention, the jig has a crosspiece spanning between the pillars adjacent the building, the said crosspiece those to each of said column A positioning plate in contact is provided, and in the temporary fixing step, the positioning plate may be temporarily fixed to the pillar.

In the method of constructing a steel material on the outer wall of a building configured in this way, the cross members of the jig are arranged across the pillars, and the positioning plate provided on the cross members is brought into contact with each pillar for positioning. Temporarily fix the plate to the pillar. As a result, the displacement of the jig, that is, the steel unit integrated with the jig in the front-rear direction (depth direction of the building) with respect to the pillar is suppressed, so that the jig can be installed with high dimensional accuracy.

According to the method of constructing a steel material on the outer wall of a building according to the present invention, it is possible to construct the steel material with good workability and accuracy even in a narrow area.

It is a top view explaining the building which is the object of the method of constructing a steel material on the outer wall of the building which concerns on one Embodiment of this invention. It is a figure for demonstrating the steel material unit and jig used in the method of constructing a steel material on the outer wall of a building which concerns on one Embodiment of this invention. It is a perspective view of the jig used in the method of constructing a steel material on the outer wall of a building which concerns on one Embodiment of this invention. It is a figure for demonstrating the method of constructing a steel material on the outer wall of a building which concerns on one Embodiment of this invention, and shows the state which the steel material unit and the jig are suspended by the lateral mobile crane. It is a schematic plan view for demonstrating the method of constructing a steel material on the outer wall of a building which concerns on one Embodiment of this invention, and shows the state which the steel material unit and the jig are arranged on the outer wall of a building. ..

A method of constructing a steel material on an outer wall of a building according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.
FIG. 1 is a plan view illustrating a building that is a target of a method of constructing a steel material on an outer wall of a building according to an embodiment of the present invention.
As shown in FIG. 1, a track B is provided in the vicinity of the outer wall A0 on the side where the steel unit 1 (see FIG. 2; the same applies hereinafter) is fixed in the building A. As described above, it is an effective construction method particularly in a narrow land or the like where a railroad track B or another existing building or the like is adjacent to the building A. The narrow space between the outer wall A0 and the track B has at least a space where the scaffold C and the steel unit 1 can be arranged.

First, the steel material unit 1 in which the steel material fixed to the building A is assembled will be described. By fixing the steel unit 1 to the building A, the earthquake resistance of the building A is improved.
FIG. 2 is a diagram for explaining a steel material unit and a jig attached to the steel material unit.
As shown in FIG. 2, the steel unit 1 is located at the center of a pair of vertical frames 11 arranged apart from each other, a horizontal frame 12 connecting the upper ends of the vertical frames 11, and a horizontal frame 12 in the extending direction. It has a pair of fixed brace members 13. Each brace material 13 is diagonally arranged so as to gradually approach the vertical frame 11 side as it goes downward.

A plurality of anchors 14 (see FIG. 5) are provided on the outer surface of each vertical frame 11 (the surface opposite to the opposite vertical frame 11 side). Further, a plurality of anchors 15 are provided on the upper surface of the horizontal frame 12.

In the present embodiment, the vertical frame 11, the horizontal frame 12, and the brace material 13 are each formed by joining a plurality of steel materials such as H-shaped steel, and are joined by bolts and nuts at predetermined positions.

Next, the temporary jig (jig) 2 will be described.
FIG. 3 is a perspective view of the temporary jig 2.
As shown in FIGS. 2 and 3, the temporary jig 2 includes a pair of horizontal members 21 arranged vertically apart from each other, and a plurality of vertical members 22 and diagonal members 23 that connect the pair of horizontal members 21 to each other. And have. The two slanted lumbers 23 are arranged so as to intersect each other.

The diagonal member 23 is provided on one side surface of the horizontal member 21. A plurality of filler plates (positioning plates) 24 are provided on the other side surface of the cross member 21.

Bolt holes 25 are provided in the upper portion and the lower portion of each filler plate 24. The filler plate 24 is connected to the cross member 21 so that each bolt hole 25 projects upward and downward from the cross member 21, respectively.

Further, the cross member 21 is provided with a suspension plate 26 to which the hook block 33 is locked when the temporary jig 2 is lifted by the lateral mobile crane 3, which will be described later.

Next, a method of constructing a steel material on the outer wall A0 of the building A will be described.
First, the crane installation process is performed.
As shown in FIG. 1, scaffolding C is installed along the outer wall A0 at intervals that allow the steel unit 1 to enter. The scaffold C is installed on a part of the outer wall A0 (in this embodiment, a position closer to one end side of the outer wall A0 as shown in FIG. 1), and is refilled according to the fixed position Z of the steel material unit 1.
FIG. 4 is a diagram for explaining a method of constructing a steel material on the outer wall A0 of the building A, and shows a state in which the steel material unit 1 and the temporary jig 2 are suspended by a hoist crane 32.
As shown in FIG. 4, the lateral mobile crane 3 is installed along the outer wall A0. Specifically, a slide rail 31 is installed at the uppermost portion of the outer wall A0 along the outer wall A0. Two hoist cranes 32 are movably installed along the slide rail 31 in the lateral direction (X direction shown in FIG. 4). The installation range of the lateral mobile crane 3 in the lateral direction X is a range that can be moved between the assembly position Y of the steel material unit 1 and the fixed position Z of the steel material unit 1 on the outer wall A0.

Next, the assembly process is performed.
As shown in FIG. 2, the steel unit 1 is attached to the temporary jig 2 at a work place (assembly position Y) where the scaffolding C at the construction site is not installed. While assembling the vertical frame 11, the horizontal frame 12, and the brace material 13 to the temporary jig 2 with bolts and nuts, the steel material unit 1 is assembled, and the steel material unit 1 and the temporary jig 2 are integrated.
The steel unit 1 may be assembled at a place other than the construction site such as a factory and then carried to the construction site.

Next, a lateral movement step is performed.
As shown in FIGS. 2 and 4, the steel unit 1 is integrated with the temporary jig 2 and the temporary jig 2 by locking the hook block 33 of the hoist crane 32 to the suspension plate 26 of the temporary jig 2. Is lifted and moved laterally (horizontally) to be placed at a predetermined assembly position Y. After that, the hoist crane 32 is lifted to the fixed position Z of the steel material unit 1.

FIG. 5 is a diagram for explaining a method of constructing a steel material on the outer wall A0 of the building A, and shows a state in which the steel material unit 1 and the jig are arranged on the outer wall A0 of the building A.
As shown in FIGS. 2, 4 and 5, the steel unit 1 is arranged between the adjacent pillars A1, and the filler plate 24 of the temporary jig 2 is arranged along the wall surface A2 of the pillar A1.

Next, a temporary fixing step is performed.
A bolt (not shown) is screwed into the bolt hole 25 of the filler plate 24 of the temporary jig 2 and temporarily fixed to the pillar A1.

Next, a grout material filling step is performed.
The grout material 4 is filled between the vertical frame 11 and the column A1 of the steel material unit 1 and between the horizontal frame 12 and the beam A3 (see FIG. 4; the same applies hereinafter), and is provided on the vertical frame 11 and the horizontal frame 12. Anchors (not shown) provided on the anchor 14, the column A1 and the beam A3 are fixed. After the grout material 4 has hardened, the temporary jig 2 is removed from the pillar A1. As a result, the steel unit 1 is fixed between the columns A1 and the lower part of the beam A3 along the outer wall A0 of the building A.

In the method of constructing the steel material on the outer wall of the building configured in this way, the steel material unit 1 attached to the temporary jig 2 is designated by temporarily fixing the temporary jig 2 to the outer wall A0 of the building A. It is arranged at the fixed position Z. Further, since the steel material unit 1 is configured by pre-assembling the vertical frame 11, the horizontal frame 12, and the brace material 13, the vertical frame 11, the horizontal frame 12, and the brace material 13 are arranged at a predetermined fixed position Z with high dimensional accuracy. And be constructed.

Further, it is possible to facilitate the positioning of the vertical frame 11, the horizontal frame 12, and the brace material 13, and it is necessary to assemble these members by welding or the like at the fixing locations of the vertical frame 11, the horizontal frame 12, and the brace material 13. Therefore, workability can be improved.

Further, when the steel unit 1 is arranged at a predetermined fixed position Z of the building A, the temporary jig 2 is suspended and laterally moved by a laterally movable crane 3 that can be laterally moved along the outer wall A0 of the building A. Therefore, the work can be performed even in a narrow area where the space between the building A and the adjacent existing structure is narrow.

Further, in the assembly process, in order to assemble the steel material unit 1 while assembling the vertical frame 11, the horizontal frame 12, and the brace material 13 to the temporary jig 2, the vertical frame 11, the horizontal frame 12, and the brace material 13 are attached to the temporary jig 2. It can be installed with good dimensional accuracy as a reference.

Further, by filling the grout material 4 between the steel material unit 1 and the outer wall A0 of the building A, the anchor 14 provided in the steel material unit 1 is fixed, and the steel material unit 1 is attached to the outer wall A0 of the building A. It is fixed. Therefore, the vertical frame 11, the horizontal frame 12, and the brace material 13 can be easily fixed to the outer wall A0 of the building A.

Further, since filler plates 24 are provided on both sides of the temporary jig 2 and each filler plate 24 is arranged along the wall surface A2 of the pillar A1, the temporary jig 2, that is, the fixed position Z of the steel material unit 1 It is possible to suppress the misalignment in the front-rear direction (the direction away from the pillar A1 surface of the building A).

The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like within a range that does not deviate from the gist of the present invention.

For example, in the embodiment shown above, the steel material unit 1 is assembled while assembling the vertical frame 11, the horizontal frame 12, and the brace material 13 to the temporary jig 2, but the present invention is not limited to this. After assembling the vertical frame 11, the horizontal frame 12, and the brace material 13 to form the steel material unit 1, the temporary jig 2 may be attached to the steel material unit 1.

A ... Building A0 ... Outer wall A1 ... Pillar A2 ... Wall surface A3 ... Beam B ... Line Y ... Assembly position Z ... Fixed position 1 ... Steel unit 2 ... Temporary jig (jig)
3 ... Horizontal mobile crane 4 ... Grout material 5 ... Bracket crane 11 ... Vertical frame 12 ... Horizontal frame 13 ... Brace material 14 ... Anchor 21 ... Horizontal material 22 ... Vertical material 23 ... Diagonal material 24 ... Filler plate (positioning plate)
26 ... Suspension plate 31 ... Slide rail 32 ... Hoist crane

Claims (5)

A construction method in which a steel unit formed by assembling a plurality of steel materials is fixed to the outer wall of a building using a jig.
A crane installation process for installing a hoist crane that can move horizontally and vertically along the outer wall,
The assembly process of attaching the steel unit to the jig and
A moving step of said jig is traversing hanging on the hoist crane, lifting up the fixed position, placing the jig in which the steel unit is mounted along the wall surface of the pillar of the building,
A construction method for fixing a steel material to an outer wall of a building, which comprises a temporary fixing step of screwing a bolt into a bolt hole of the jig and temporarily fixing the bolt to the pillar. The construction method for fixing a steel material to an outer wall of a building according to claim 1, wherein in the assembly step, the steel material unit is assembled while assembling the steel material to the jig. The construction method according to claim 1, wherein in the assembly step, the steel material is assembled to form the steel material unit, and then the jig is attached to the steel material unit to fix the steel material to the outer wall of the building. The steel unit is provided with an anchor.
The building according to any one of claims 1 to 3, further comprising a grout material filling step of filling the outer wall and the steel material unit with a grout material to fix the anchor. A construction method for fixing steel materials to the outer wall of the building. The jig has a cross member that straddles between the adjacent pillars of the building.
The cross member is provided with a positioning plate that abuts on each of the pillars.
The construction method for fixing a steel material to the outer wall of a building according to any one of claims 1 to 4, wherein in the temporary fixing step, the positioning plate is temporarily fixed to the pillar.

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