Scaffold structure and scaffold construction method

Abstract

To provide a scaffold structure and a scaffold construction method that can improve workability of base concrete in comparison with erecting support members from the ground foundation.SOLUTION: A scaffold structure 20 includes a bottom concrete (sub-slab concrete 12) cast on the ground foundation, multiple columnar foundation members 16 arranged on the bottom concrete, a scaffold structure 22 that is supported by the foundation members 16 and spans between the foundation members 16, and a ladder 24 hung down from the scaffold structure 22.SELECTED DRAWING: Figure 4A

Description

[Technical field]

[0001] The present invention relates to a scaffold structure and a method for constructing a scaffold. [Background technology]

[0002] The following Patent Document 1 describes a precast component with built-in scaffolding, in which the upper edge of the scaffolding is rotatably fixed to the top of a precast column component. With this precast component with built-in scaffolding, the scaffolding for work is set up at a construction site by opening the scaffolding upward and supporting it on the ground using a support member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-282620 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the precast member with built-in scaffolding shown in the above-mentioned Patent Document 1, the support member that supports the scaffolding is raised from the ground. For this reason, for example, when forming a base concrete such as a slab foundation on the ground surface, it is necessary to remove the support member before pouring the concrete. In such a case, pouring the concrete is difficult. Alternatively, it is necessary to surround the part where the support member is located and pour concrete around it, and then pour the concrete in the part where the support member is located later. In such a case, construction work is laborious.

[0005] In consideration of the above-mentioned facts, the present invention aims to provide a scaffolding structure and a scaffolding construction method that improve the workability of base concrete compared to when the scaffolding support members are raised from the ground. [Means for solving the problem]

[0006] The scaffolding structure of claim 1 comprises a bottom concrete poured on the ground, a plurality of columnar foundation members arranged on the bottom concrete, a scaffolding structure supported by the foundation members and spanning between the foundation members, and a ladder suspended from the scaffolding structure.

[0007] In the scaffolding structure of claim 1, the scaffolding structure is supported by a foundation member. Also, a ladder is suspended from the scaffolding structure. This allows workers to move from the scaffolding structure to above the bottom concrete to perform work such as reinforcing the foundation beams. Also, there is no need to raise the support legs that support the scaffolding structure from the bottom concrete. Therefore, the base concrete can be poured above the bottom concrete without removing the scaffolding structure. This improves the workability of the base concrete.

[0008] The scaffolding structure of claim 2 is the scaffolding structure described in claim 1, which comprises a base concrete poured above the bottom concrete, and the lower end of the ladder is positioned above the upper surface of the base concrete.

[0009] In the scaffolding structure of claim 2, the lower end of the ladder is disposed above the upper surface of the base concrete poured above the bottom concrete. Therefore, there is no need to remove the ladder when pouring the base concrete.

[0010] The scaffolding structure of claim 3 is the scaffolding structure described in claim 1 or 2, in which a rectangular landing protruding outward from the base member is formed above the base member as the scaffolding structure, and the ladder is suspended from the landing.

[0011] In the scaffolding structure of claim 3, a rectangular landing protruding outward from the base member is formed as the scaffolding structure. This makes it easier to carry out various tasks on the scaffolding structure compared to when there is no landing. For example, multiple workers can work at the same time.

[0012] The scaffolding construction method of claim 4 comprises the steps of pouring bottom concrete on the ground, arranging a plurality of columnar foundation members on the bottom concrete, bridging a scaffolding structure supported by the foundation members between the foundation members, suspending a ladder from the scaffolding structure, and pouring bottom concrete above the bottom concrete with a gap between the lower end surface of the ladder.

[0013] In the scaffolding construction method of claim 4, the scaffolding structure is supported by a foundation member. Also, a ladder is suspended from the scaffolding structure. This allows a worker to move from the scaffolding structure to above the bottom concrete and perform reinforcing work for the base concrete and the foundation beams. Also, there is no need to raise the support legs that support the scaffolding structure from the bottom concrete. Therefore, the base concrete can be poured above the bottom concrete without removing the scaffolding structure.

[0014] In addition, in this scaffolding construction method, the lower end of the ladder is positioned above the top surface of the base concrete that is poured above the bottom concrete. Therefore, there is no need to remove the ladder when pouring the base concrete. This improves the workability of the base concrete. Effect of the Invention

[0015] According to the present invention, the workability of the base concrete can be improved compared to when the scaffolding support members are raised from the ground. [Brief description of the drawings]

[0016] [Figure 1] 1 is a plan view showing a foundation to which a scaffolding structure and a scaffolding construction method according to an embodiment of the present invention are applied. FIG. [Diagram 2] 2 is a cross-sectional view taken along line 2-2 in FIG. [Figure 3A] 1 is a plan view showing a state in which a foundation member is placed on sacrificial concrete in a scaffolding construction method according to an embodiment of the present invention. FIG. [Figure 3B] 3B is a cross-sectional view taken along line BB in FIG. 3A. [Figure 4A] This is a plan view showing the state in which a scaffolding structure is spanned across a foundation member and a ladder is fixed in place in a scaffolding construction method according to an embodiment of the present invention. [Figure 4B] This is a cross-sectional view taken along line CC in Figure 4A, showing the state before the ladder is fixed. [Figure 4C] 4B is a cross-sectional view taken along line CC in FIG. 4A. [Figure 5A] 1 is a plan view showing the state in which reinforcing bars of a foundation beam have been arranged in a scaffolding construction method according to an embodiment of the present invention. FIG. [Figure 5B] 5B is a cross-sectional view taken along line BB in FIG. 5A. [Figure 6A] This is a cross-sectional view showing the state in which the base concrete is poured on top of the basal concrete. [Figure 6B] This is a cross-sectional view showing the state after concrete has been poured into the foundation beam. [Figure 7] FIG. 2 is a plan view showing an example of the arrangement of a scaffolding structure according to an embodiment of the present invention. [Figure 8] 1 is a plan view showing a modified example of a scaffolding structure according to an embodiment of the present invention in which the landing is omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, a scaffolding structure and a scaffolding construction method according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in each drawing are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0018] In addition, explanations of configurations and symbols that are duplicated in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations, replacing them with different configurations, or combining one embodiment and various modified examples, within the scope of the purpose of the present disclosure.

[0019] In each drawing, the directions indicated by the arrows X and Y are directions along a horizontal plane and are perpendicular to each other. The direction indicated by the arrow Z is a direction along the vertical direction (up and down direction). The directions indicated by the arrows X, Y, and Z in each drawing are assumed to be mutually consistent.

[0020] <Basics> A scaffolding structure 20 (see FIG. 4) according to an embodiment of the present invention can be used, by way of example, to construct the foundation 10 shown in FIGS.

[0021] As shown in FIG. 2, the foundation 10 is configured to include basing concrete 12, a base plate 14, a foundation member 16, and a foundation beam 18.

[0022] The sacrificial concrete 12 is an example of the bottom concrete in the present invention, and is concrete for leveling the ground that is poured on the ground G. Note that the composition, thickness, strength, slump value, etc. of the bottom concrete in the present invention are not particularly limited.

[0023] The foundation members 16 are columnar members arranged on the sacrificial concrete 12, and a plurality of the foundation members 16 are arranged side by side in each of the X direction and the Y direction. The foundation members 16 are made of precast concrete.

[0024] The base plate 14 is a pressure-resistant plate cast above the basin concrete 12, and is disposed in contact with the side surface of the foundation member 16. The foundation beams 18 are also disposed in contact with the side surface of the foundation member 16.

[0025] Reinforcing bars 14A arranged in the base plate 14 are connected to reinforcing bars 16A inserted in the foundation member 16 by lap joints. Reinforcing bars 16A are connected to reinforcing bars 16C inside the foundation member 16 by mechanical joints 16B. Similarly, reinforcing bars 18A arranged in the foundation beams 18 are also connected to reinforcing bars 16A by lap joints. In this way, the base plate 14 and the foundation beams 18 are integrated with the foundation member 16.

[0026] The reinforcing bars 14A and 16A, and the reinforcing bars 18A and 16A may be connected by pressure welding, welding, or mechanical joints, respectively. These connection methods can be appropriately selected according to the conditions required at the site.

[0027] As shown in Fig. 1, a pit P is formed in a space surrounded by a base plate 14, a foundation member 16, and a foundation beam 18. By using a scaffolding structure 20 described below, workers can move to this pit P and work there.

[0028] <Scaffolding structure> As shown in Fig. 4(A), the scaffolding structure 20 includes a scaffolding structure 22 and a ladder 24. The scaffolding structure 22 is a work platform or walkway supported by the base members 16 and spanning between the base members 16.

[0029] The scaffolding structure 22 includes a passage 22A and a landing 22B. The landing 22B is a rectangular scaffolding that is disposed directly above the base member 16 and protrudes outward from the base member 16. The landing 22B is supported by the base member 16.

[0030] Four ladders 24 are fixed to the landing 22B. The ladders 24 are provided on both sides in the X direction and both sides in the Y direction as viewed from the base member 16. Therefore, workers can use the ladders 24 from the landing 22B to move to four pits P (see FIG. 1) around the base member 16.

[0031] 4(A) shows a state in which the foundation 10 is being constructed using the scaffolding structure 20. Meanwhile, FIG. 6(B) shows a state in which the construction of the foundation 10 is completed and before the scaffolding structure 20 is removed.

[0032] As shown in this figure, ladder 24 is suspended from landing 22B, and the lower end of ladder 24 is disposed above the upper surface of base plate 14. Note that a stand for stably supporting ladder 24 is constructed on landing 22B using a single pipe or the like, but the stand is omitted from each figure.

[0033] As shown in Fig. 7, a landing 22B is provided for every two foundation members 16 aligned in the Y direction (one for every two spans). Similarly, a landing 22B is provided for every two foundation members 16 aligned in the X direction. This allows workers to move to all of the pits P. The number of landings 22B can be increased as necessary.

[0034] The passage 22A is a scaffolding that spans between the base members 16. The passage 22A also spans between the base members 16 and the landing 22B.

[0035] Among these, the passages 22A along the X direction are disposed consecutively and span between the foundation members 16. Also, the passages 22A along the X direction are provided at one location for every four spans in the Y direction. Furthermore, the passages 22A along the X direction are disposed at positions sandwiched between landings 22B in the Y direction.

[0036] On the other hand, the passage 22A along the Y direction is a passage for moving from the passage 22A along the X direction to the landing 22B. Therefore, the passage 22A along the Y direction connects the passage 22A along the X direction and the landing 22B.

[0037] The passages 22A may be arranged so that all landings 22B can be accessed. From the viewpoint of ease of movement, for example, the passages 22A along the X direction may be provided at one location "every two spans" in the Y direction. In this case, the passages 22A along the Y direction can also be added as appropriate.

[0038] <How to build foundations and scaffolding> In order to construct the foundation 10 and the scaffolding structure 20, first, as shown in Figures 3(A) and (B), basal concrete 12 is poured on the ground G to level the surface, and then foundation members 16 transported from a factory or the like are placed on this basal concrete 12.

[0039] At this time, it is preferable to mark (ink out) the portion of the sacrificial concrete 12 on which the foundation member 16 will be placed. Also, an angle bar or the like that can be brought into contact with the side surface of the lower end of the foundation member 16 for alignment may be fixed on the sacrificial concrete 12.

[0040] Next, as shown in Figures 4(A) and (B), a unitized landing 22B is placed on the foundation member 16, and furthermore, a walkway 22A is laid between the foundation members 16 or between the foundation member 16 and the landing 22B. Then, as shown in Figure 4(C), a ladder 24 is fixed to the landing 22B. In this way, the scaffolding structure 20 is constructed.

[0041] Next, as shown in Figures 5(A) and (B), reinforcing bars 18A of the foundation beams 18 (see Figure 1) are arranged. Although not shown in Figure 5(A), reinforcing bars 14A of the base plate 14 are arranged. At this time, a worker uses a ladder 24 to move from the landing 22B onto the basin concrete 12, and moves to the work space as shown by the arrow N. Although not shown, a sleeve that penetrates the foundation beams 18 is installed as necessary.

[0042] 6(A), the concrete for the base plate 14 is poured above the basing concrete 12. At this time, the concrete for the base plate 14 is poured with a gap between it and the lower end surface of the ladder 24.

[0043] After the concrete of the base plate 14 has hardened, concrete for the foundation beams 18 is poured as shown in Fig. 6(B). When constructing the foundation beams 18, workers use ladders 24 to move from the landing 22B to the base plate 14 and install and remove formwork.

[0044] After constructing the foundation beams 18, a deck slab (not shown) is placed across the foundation beams 18, and slab reinforcement is arranged. Slab concrete is then poured onto the deck slab to construct a slab that covers the pit P. Then, the scaffolding structure 20 is removed. This completes the construction of the foundation 10 shown in FIG. 1. Note that the slab that covers the pit P is not shown in the figures.

[0045] <Action and Effects> In a scaffolding structure 20 according to an embodiment of the present invention, as shown in Fig. 4(A), a walkway 22A and a landing 22B as a scaffolding structure 22 are supported by a base member 16. In addition, a ladder 24 is suspended from the landing 22B.

[0046] This allows workers to move from the scaffolding structure 22 onto the basin concrete 12, as shown by the arrow N in Fig. 5(A), and simultaneously perform reinforcing work for the base plate 14 and the foundation beams 18. In addition, there is no need to raise the support legs that support the scaffolding structure 22 from the basin concrete 12. Therefore, as shown in Fig. 6(A), the concrete of the base plate 14 can be poured above the basin concrete 12 without removing the scaffolding structure 22.

[0047] Furthermore, in this scaffolding structure 20, the lower end of the ladder 24 is disposed above the upper surface of the base plate 14 that is poured above the basin concrete 12. Therefore, it is not necessary to remove the ladder 24 when pouring the concrete for the base plate 14.

[0048] In addition, in this scaffolding structure 20, a rectangular landing 22B that protrudes outward from the base member 16 is formed as the scaffolding structure 22. This makes it easier to carry out various types of work on the scaffolding structure 22 compared to a case in which there is no landing 22B. For example, multiple workers can work at the same time.

[0049] In the above embodiment, the walkway 22A and the landing 22B are provided as the scaffolding structure 22, but the embodiment of the present invention is not limited to this. For example, as shown in FIG. 8, a configuration may be adopted in which the landing 22B is not provided. In this case, the ladder 24 is fixed to the walkway 22A and suspended. With such a configuration, the same effect as the above embodiment can be obtained. In this way, the present invention can be embodied in various forms. [Explanation of symbols]

[0050] 12. Concrete for scavenging (bottom concrete) 14 Bottom board 16 Foundation members 20 Scaffolding 22 Scaffolding structure 22A Passage (Scaffolding Structure) 22B Landing (Scaffolding structure) 24 Ladder G. Ground

Claims

1. A bottom concrete layer is poured on the ground. A plurality of columnar foundation members disposed on the bottom concrete; A scaffold structure supported by the foundation members and spanning between the foundation members; a ladder suspended from the scaffolding structure; A scaffolding structure equipped with

2. A base concrete is provided above the bottom concrete, The lower end of the ladder is disposed above the upper surface of the concrete base. The scaffold structure of claim 1 .

3. Above the base member, The scaffold structure includes a rectangular landing extending outward from the base member, The ladder is suspended from the landing.

3. A scaffold structure according to claim 1 or 2.

4. pouring bottom concrete on the ground; placing a plurality of columnar foundation members on the bottom concrete; A step of bridging the scaffolding structure supported by the foundation members between the foundation members; suspending a ladder from the scaffold structure; A step of pouring a base concrete above the bottom concrete with a gap between the bottom concrete and the lower end surface of the ladder; A scaffolding construction method comprising:

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