Construction method for installing temporary scaffolding in building construction.

Abstract

To improve the efficiency of construction work. [Solution] In the construction method for installing a temporary platform, a specific horizontal member that interferes with the opening for the tower crane is temporarily installed at a specific location. The specific location is within the opening, different from the final installation location of the specific horizontal member, and is a location that does not interfere with the tower crane. The temporarily installed specific horizontal member is used as a main beam to install the temporary platform within the opening.

Description

Technical Field

[0006] ,

[0007] , ,

[0001] The technology disclosed in this specification relates to a method for installing a temporary scaffold in construction work.

Background Art

[0002] In construction work, for example, a temporary scaffold (temporary stage) is used for the loading and unloading of materials and equipment using a tower crane. The temporary scaffold is often installed on the outer periphery of a building where it is difficult to leave unfinished construction work on the structure (e.g., see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Depending on the site conditions and the shape of the building, it may be difficult to install the temporary scaffold on the outer periphery of the building, and in some cases, the temporary scaffold has to be installed inside the building. In such cases, there is a problem that the efficiency of the construction work decreases due to operations such as installing steel members at the opening after removing the tower crane.

[0005] This specification discloses a technology capable of solving the above-described problems.

Means for Solving the Problems

[0006] The technology disclosed in this specification can be realized, for example, in the following forms.

[0007] (1) In the construction method for installing a temporary platform in construction work disclosed herein, a specific horizontal member of the building that interferes with the opening for the tower crane is temporarily installed at a specific location that is different from the final installation position of the specific horizontal member within the opening and does not interfere with the tower crane, and the temporary platform is installed within the opening using the specific horizontal member as a main beam. According to this construction method, by effectively utilizing the opening for the tower crane as space for the temporary platform, for example, it is possible to create a large space for work and loading and unloading of materials and equipment even at a narrow construction site, and the work of moving the specific horizontal member from the specific location to the final installation position after the removal of the tower crane can be easily carried out, thereby increasing the efficiency of the construction work.

[0008] (2) In the above construction method, the final installation position and the specified position may be in a positional relationship aligned horizontally. With this configuration, the work of moving the specified horizontal member from the specified position to the final installation position can be further simplified, and the efficiency of the construction can be further increased.

[0009] (3) In the above construction method, a specific horizontal member with anti-sagging members attached to both ends may be prepared, and the anti-sagging members may be supported by other horizontal members during the temporary installation of the specific horizontal member. With this configuration, the specific horizontal member can be efficiently temporarily installed at a specific location, and the efficiency of the construction can be further increased.

[0010] (4) In the above construction method, when installing the temporary scaffolding, the temporary scaffolding may be installed in a different location for each floor of the building. With this configuration, the temporary scaffolding can be installed in a convenient location for each floor, further increasing the efficiency of the construction work.

[0011] (5) In the above construction method, when installing the temporary platform, the temporary platform may be installed in a first direction relative to the tower crane on odd-numbered floors of the building, and in a second direction opposite to the first direction relative to the tower crane on even-numbered floors of the building. With this configuration, the loading and unloading of materials and equipment using the tower crane and temporary platform can be carried out efficiently, and the efficiency of the construction can be further increased.

[0012] (6) In the above construction method, when installing the temporary platform, the temporary platform may be installed on each of two consecutive floors of the building. With this configuration, a large space can be secured above the temporary platform, and the loading and unloading of materials and equipment using the temporary platform can be carried out efficiently, further increasing the efficiency of the construction work.

[0013] (7) In the above construction method, when setting up the temporary platform, joists and floorboards may be installed on top of the specified horizontal members that serve as the main beams. With this configuration, a temporary platform can be constructed that allows for the efficient loading and unloading of materials and equipment, thereby further increasing the efficiency of the construction work.

[0014] (8) In the above construction method, after the use of the temporary platform on a specific floor of the building is completed, the joists and floorboards used to construct the temporary platform on the specific floor may be reused to install the temporary platform on another floor of the building. With this configuration, there is no need to prepare joists and floorboards individually for each floor, and the efficiency of the construction can be further increased.

[0015] (9) In the above construction method, the specified horizontal member may be a steel beam. With this configuration, a temporary platform can be constructed by using a steel beam as a main beam.

[0016] The technologies disclosed herein can be implemented in various forms, for example, in the form of a construction method for installing temporary scaffolding in building construction, a structure for temporary scaffolding, and a construction method using temporary scaffolding.

Brief Description of the Drawings

[0017] [Figure 1] Explanatory drawing showing the configuration of the building 100 in this embodiment [Figure 2] Explanatory drawing showing the arrangement of the tower crane 10 and the temporary scaffold 20 installed during construction [Figure 3] Explanatory drawing showing the arrangement of the tower crane 10 and the temporary scaffold 20 installed during construction [Figure 4] Explanatory drawing showing the configuration of the temporary scaffold 20 [Figure 5] Explanatory drawing showing the configuration of the temporary scaffold 20 [Figure 6] Flowchart showing the construction method of the building 100

Modes for Carrying Out the Invention

[0018] (Embodiment) (Configuration of the building 100) FIG. 1 is an explanatory drawing showing the configuration of the building 100 in this embodiment. FIG. 1 shows a part of the plan view of the reference floor of the building 100

[0019] As shown in FIG. 1, the building 100 includes, as horizontal members, a main beam 120 and a secondary beam 130. The main beam 120 is a beam spanned between two columns 110, and the secondary beam 130 is a beam spanned between two main beams 120. The main beam 120 and the secondary beam 130 are formed of, for example, steel frames, and more specifically, are formed of H-shaped steel

[0020] FIGS. 2 and 3 are explanatory drawings showing the arrangement of the tower crane 10 and the temporary scaffold 20 installed during construction. FIG. 2 shows the state of the odd floors 100o (excluding the first floor) in the building 100 under construction, and FIG. 3 shows the state of the even floors 100e in the building 100 under construction

[0021] As shown in FIGS. 2 and 3, during construction, a tower crane 10 is installed for the loading and unloading of construction materials and equipment. In this embodiment, the tower crane 10 is installed inside the building 100. Among the horizontal members of the building 100, three small beams 130 (130A, 130B, 130C) interfere with the opening for the tower crane 10. Hereinafter, the small beams that interfere with the opening for the tower crane 10 are referred to as specific small beams 130A, 130B, 130C. The specific small beams 130A, 130B, 130C are an example of specific horizontal members.

[0022] During construction, for example, a temporary scaffold 20 is installed for the loading and unloading of construction materials and equipment using the tower crane 10. As shown in FIGS. 2 and 3, the temporary scaffold 20 (shown by a dashed line) is installed inside the opening for the tower crane 10. As shown in FIG. 2, on the odd floors 100o (3rd floor, 5th floor, ···), the temporary scaffold 20 is installed on the positive X-axis side (for example, the east side) with respect to the tower crane 10, and as shown in FIG. 3, on the even floors 100e (2nd floor, 4th floor, ···), the temporary scaffold 20 is installed on the negative X-axis side (for example, the west side) opposite to the positive X-axis with respect to the tower crane 10. One of the positive X-axis direction and the negative X-axis direction is an example of the first direction, and the other of the positive X-axis direction and the negative X-axis direction is an example of the second direction.

[0023] FIGS. 4 and 5 are explanatory diagrams showing the configuration of the temporary scaffold 20. FIG. 4 shows the side configuration of the X1 part in FIG. 2, and FIG. 5 shows a partial perspective view of the temporary scaffold 20. In FIG. 5, some of the members constituting the temporary scaffold 20 are not shown.

[0024] As shown in Figures 4 and 5, the temporary platform 20 is constructed using specific beams 130A, 130B, and 130C as joists. That is, the specific beams 130A, 130B, and 130C are temporarily installed in the opening for the tower crane 10 at a position different from the final installation position (original installation position) shown in Figure 1 (hereinafter referred to as the "specific position"). The specific position is a position that does not interfere with the tower crane 10. As shown in Figure 2, on odd-numbered floors 100o, the specific beams 130A, 130B, and 130C are temporarily installed at a specific position (solid line) that is slid horizontally, more specifically in the positive X-axis direction, from the final installation position (dashed line). As shown in Figure 3, on even-numbered floors 100e, the specific beams 130A, 130B, and 130C are temporarily installed at a specific position (solid line) that is slid horizontally, more specifically in the negative X-axis direction, from the final installation position (dashed line). On each floor, the specific beams 130A, 130B, and 130C are arranged at approximately equal intervals. The spacing between the specific beams 130A, 130B, and 130C is, for example, 700 mm.

[0025] At the upper surfaces of both ends of each of the specific beams 130A, 130B, and 130C, anti-sagging members 25 are joined, for example, by fillet welding. The anti-sagging members 25 are, for example, flat plate members formed by processing steel plates. The thickness and welding conditions of the anti-sagging members 25 are determined based on the assumed load capacity of the temporary platform 20 and the weight of the specific beams 130A, 130B, and 130C. A portion of the anti-sagging member 25 in the longitudinal direction protrudes outward from the longitudinal ends of the specific beams 130A, 130B, and 130C. The protruding portion of the anti-sagging member 25 abuts against the upper surface of the main beam 120, thereby supporting the specific beams 130A, 130B, and 130C by the main beam 120. The support positions of the specific beams 130A, 130B, and 130C on the main beam 120 are determined in advance, for example, on the ground. In this embodiment, a notch 25a is formed on the lower surface of the anti-sagging member 25. One side of the anti-sagging member 25, flanking the notch 25a, is joined to specific small beams 130A, 130B, and 130C, while the other side of the notch 25a is engaged with the main beam 120. A through hole 25b for suspension may be formed in the anti-sagging member 25.

[0026] As shown in Figure 5, temporary bracing members may be installed at both ends of each of the specific beams 130A, 130B, and 130C. The bracing members are installed, for example, by fixing single pipes 26 with two catch clamps 27 to both ends in the width direction of the upper flange of the specific beams 130A, 130B, and 130C so that they protrude outward from the longitudinal ends of the specific beams 130A, 130B, and 130C.

[0027] A temporary platform 20 is constructed by installing joists 21 and 22 on top of specific beams 130A, 130B, and 130C, which serve as main beams, and then laying floorboards 23 on top of the joists. The joists 21 and 22 are formed, for example, by assembling 60mm square pipes in a grid pattern. The lower joists 21 are arranged in a direction perpendicular to the extension direction (Y-axis direction) of the specific beams 130A, 130B, and 130C (X-axis direction), for example, at 900mm (or 600mm) intervals. The upper joists 22 are arranged in a direction perpendicular to the extension direction (X-axis direction) of the lower joists 21 (Y-axis direction), for example, at 600mm intervals. For the floorboards 23, for example, 35mm thick cedar boards (scaffolding boards) are used.

[0028] (100 construction methods for buildings) Figure 6 is a flowchart showing the construction method of building 100. Below, we will explain the part of the construction method of building 100 that relates to the temporary platform 20.

[0029] First, specific beams 130A, 130B, and 130C, each fitted with a sagging stopper 25 at both ends, are prepared (S110). The sagging stopper 25 is attached, for example, at a steel fabrication plant (fabricator). The specific beams 130A, 130B, and 130C with the sagging stopper 25 attached are transported to the construction site of building 100, just like other steel members.

[0030] Next, the temporary platform 20 is constructed using the specific joists 130A, 130B, and 130C as main beams (S120). More specifically, the specific joists 130A, 130B, and 130C are temporarily installed at specific locations different from their final installation locations. At this time, the anti-sagging members 25 attached to the specific joists 130A, 130B, and 130C are supported by the main beams 120. After that, the temporary platform 20 is constructed by installing joists 21, 22 and floorboards 23 on top of the specific joists 130A, 130B, and 130C which are acting as main beams. If there is a step between the top surface of the floorboards 23 of the temporary platform 20 and the top surface of the slab, steel plates or the like may be laid to mitigate the step. In this embodiment, the temporary platform 20 is installed on the lower floors, for example, the second and third floors, in S120. The temporary platform 20 may be installed at different locations on each floor of the building 100. For example, on the second floor, the temporary platform 20 may be installed on the negative X-axis side relative to the tower crane 10, as shown in Figure 3, and on the third floor, the temporary platform 20 may be installed on the positive X-axis side relative to the tower crane 10, as shown in Figure 2.

[0031] Next, the tower crane 10 and the temporary platform 20 are used to load and unload materials and equipment (S130). The temporary platform 20 may also be used for other purposes (for example, as a work platform for welding joints of the columns 110).

[0032] After the use of the temporary platform 20 on the floor where it is installed is completed, the joists 21, 22 and floorboards 23 used to construct the temporary platform 20 on that floor are reused to install temporary platforms 20 on other floors, for example, the 4th and 5th floors (S140). That is, for the 4th and 5th floors, the specific joists 130A, 130B, and 130C of that floor are temporarily installed as main beams. The temporary platform 20 for that floor is constructed by installing the joists 21, 22 and floorboards 23 reused from the lower floors on top of these specific joists 130A, 130B, and 130C. On the 4th floor of the building 100, the temporary platform 20 may be installed on the negative X-axis side relative to the tower crane 10, similar to the 2nd floor, and on the 5th floor, the temporary platform 20 may be installed on the positive X-axis side relative to the tower crane 10, similar to the 3rd floor. Thus, on odd-numbered floors 100o of the building 100, the temporary platform 20 may be installed on the positive X-axis side relative to the tower crane 10, and on even-numbered floors 100e of the building 100, the temporary platform may be installed on the negative X-axis side relative to the tower crane 10.

[0033] When the use of the temporary platform 20 is complete and floor construction is to fill the opening for the tower crane 10, the joists 21, 22 and floor slabs 23 are removed, and the specific beams 130A, 130B, and 130C are moved from the specified positions to the final installation positions and permanently installed by joining them to the main beam 120 (S150). After that, the slab for that floor is installed. Alternatively, stud bolts may be driven into the specific beams 130A, 130B, and 130C while they are temporarily installed in the specified positions. In this case, the deck plate may be a single beam per span.

[0034] (Effects of this embodiment) As described above, in the construction method for installing the temporary platform 20 of this embodiment, specific beams 130A, 130B, and 130C that interfere with the opening for the tower crane 10 are temporarily installed at specific locations. The specific locations are within the opening that are different from the final installation locations of the specific beams 130A, 130B, and 130C, and that do not interfere with the tower crane 10. The temporary platform 20 is installed within the opening by utilizing the temporarily installed specific beams 130A, 130B, and 130C as main beams. According to the construction method of this embodiment, by effectively utilizing the opening for the tower crane 10 as space for the temporary platform 20, it is possible to create a large space for work and loading / unloading of materials and equipment, even in a narrow construction site, and it is also possible to easily move the specific beams 130A, 130B, and 130C from the specific locations to the final installation locations after the removal of the tower crane 10, thereby increasing the efficiency of the construction work.

[0035] In the construction method of this embodiment, the final installation positions of the specific beams 130A, 130B, and 130C and the specified locations where they are temporarily installed are aligned horizontally. Therefore, the work of moving the specific beams 130A, 130B, and 130C from the specified locations to the final installation positions can be further simplified, thereby further increasing the efficiency of the construction work.

[0036] In the construction method of this embodiment, specific small beams 130A, 130B, and 130C, each equipped with a sagging prevention member 25 at both ends, are prepared. During the temporary installation of the specific small beams 130A, 130B, and 130C, the sagging prevention members 25 are supported by other horizontal members. Therefore, the specific small beams 130A, 130B, and 130C can be efficiently temporarily installed at specific locations, further increasing the efficiency of the construction work.

[0037] In this embodiment of the construction method, temporary scaffolding 20 is installed at different locations for each floor of the building 100. Therefore, temporary scaffolding 20 can be placed in easily accessible locations on each floor, further increasing the efficiency of the construction work.

[0038] In the construction method of this embodiment, on odd-numbered floors 100o of the building 100, the temporary platform 20 is installed in a first direction relative to the tower crane 10, and on even-numbered floors 100e of the building 100, the temporary platform 20 is installed in a second direction opposite to the first direction relative to the tower crane 10. Therefore, the loading and unloading of materials and equipment using the tower crane 10 and the temporary platform 20 can be carried out efficiently, further increasing the efficiency of the construction work.

[0039] In this embodiment of the construction method, temporary scaffolding 20 is installed on each of two consecutive floors of the building 100. Therefore, a large space can be secured above the temporary scaffolding 20, and the loading and unloading of materials and equipment using the temporary scaffolding 20 can be carried out efficiently, further increasing the efficiency of the construction work.

[0040] In the construction method of this embodiment, when installing the temporary platform 20, joists 21, 22 and floorboards 23 are installed on top of the specific secondary beams 130A, 130B, and 130C which serve as main beams. As a result, a temporary platform 20 can be constructed that allows for the efficient loading and unloading of materials and equipment, further increasing the efficiency of the construction work.

[0041] In the construction method of this embodiment, after the use of the temporary platform 20 on a specific floor of the building 100 is completed, the joists 21, 22 and floorboards 23 used to construct the temporary platform 20 on that specific floor are reused to install a temporary platform 20 on another floor of the building 100. Therefore, there is no need to individually prepare joists 21, 22 and floorboards 23 for each floor, which further increases the efficiency of the construction.

[0042] (modified version) The technologies disclosed herein are not limited to the embodiments described above and can be modified in various forms without departing from their essence, for example, the following modifications are possible.

[0043] The construction method for installing the temporary platform 20 in the above embodiment is merely an example and can be modified in various ways. For example, in the above embodiment, the configuration of the temporary platform 20 (for example, the shape and arrangement of the members used as joists and floorboards) can be modified in various ways.

[0044] In the above embodiment, the joists 21, 22 and floorboards 23 used to construct the temporary platform 20 on a specific floor do not need to be repurposed for the construction of the temporary platform 20 on other floors.

[0045] In the above embodiment, it is not necessary to install temporary scaffolding 20 on all floors of the building 100. In the above embodiment, the installation positions of the temporary scaffolding 20 on each floor may be the same.

[0046] In the above embodiment, specific joists 130A, 130B, and 130C on one floor may be used as main beams for the temporary platform 20 on other floors. [Explanation of Symbols]

[0047] 10: Tower crane 20: Temporary platform 21,22: Joist 23: Floor slab 25: Anti-sagging member 25a: Notch 25b: Through hole 26: Single pipe 27: Catch clamp 100: Building 100e: Even-numbered floor 100o: Odd-numbered floor 110: Column 120: Main beam 130: Secondary beam 130A,130B,130C: Specific secondary beam

Claims

1. A construction method for installing temporary scaffolding in building construction, Among the horizontal structural members of a building, a specific horizontal structural member that interferes with the opening for a tower crane is temporarily installed at a specific location within the opening that is different from the final installation position of the specific horizontal structural member and does not interfere with the tower crane. A construction method in which the aforementioned specific horizontal members are used as main beams and the temporary platform is installed within the opening.

2. The construction method according to claim 1, A construction method in which the aforementioned final installation position and the aforementioned specific position are in a horizontally aligned positional relationship.

3. A construction method according to claim 1 or claim 2, Prepare the specified horizontal member with anti-sagging members attached to both ends, A construction method for the temporary installation of the aforementioned specific horizontal member, wherein the anti-sagging member is supported by other horizontal members.

4. A construction method according to claim 1 or claim 2, A construction method for installing the temporary scaffolding, wherein the temporary scaffolding is installed at a different location for each floor of the building.

5. The construction method according to claim 4, A construction method for installing the temporary platform, wherein on odd-numbered floors of the building, the temporary platform is installed in a first direction relative to the tower crane, and on even-numbered floors of the building, the temporary platform is installed in a second direction opposite to the first direction relative to the tower crane.

6. The construction method according to claim 4, A construction method for installing the temporary platform, wherein the temporary platform is installed on each of two consecutive floors of the building.

7. A construction method according to claim 1 or claim 2, A construction method for installing the temporary platform, wherein joists and floorboards are installed on top of the specified horizontal members that serve as the main beams.

8. The construction method according to claim 7, A construction method comprising, after the use of the temporary platform on a specific floor of the building is completed, reusing the joists and floorboards used to construct the temporary platform on the specific floor to install the temporary platform on another floor of the building.

9. A construction method according to claim 1 or claim 2, The aforementioned specific horizontal member is a steel beam, in this construction method.

Images