How to install safety equipment

Abstract

To enable rational installation of a safety facility to be used when constructing an RC frame structure, and to improve workability and reduce work time in installing the safety facility.SOLUTION: There provided is a method of installing a safety facility for use in constructing an RC frame structure 10, comprising a formwork erection process in which a rising formwork 21 is erected using a plurality of vertical end thick materials 4 with extending portions 4A that extend above the rising formwork 21 for forming the frame structure, and a handrail erection process in which a handrail 6 is erected using the plurality of extending portions 4A.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for installing safety equipment used when constructing a reinforced concrete skeleton structure. [Background technology]

[0002] The background technology of the present invention includes a technique in which, at a construction site of a reinforced concrete building, multiple pillars supporting a life rope or safety fence are attached to the horizontal end members and crosspieces of a concrete formwork, making it possible to use the life rope or safety fence as safety equipment in reinforcement work and slab construction work after the concrete formwork has been formed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-043678 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology described in Patent Document 1, when installing safety equipment, it is necessary to prepare special posts to support the life rope or safety fence and attach them to the concrete formwork. Therefore, there is room for improvement in terms of improving the workability and reducing the work time required for installing the safety equipment.

[0005] In view of this situation, the main objective of the present invention is to enable the rational installation of safety equipment used when constructing reinforced concrete structural members, thereby improving the ease of installation of said safety equipment and shortening the installation time. [Means for solving the problem]

[0006] The first characteristic configuration of the present invention is a method for installing safety equipment used when constructing a reinforced concrete structure, A standing formwork for forming the framework structure is made by using multiple horizontal thick members and multiple vertical thick members. The process of erecting the formwork, The vertical end thick material used to support the rising formwork during the formwork erection process and a handrail installation process in which handrails are installed using Go, The plurality of vertical end members include a vertical end member having an extension portion extending upward from the rising formwork, In the handrail installation process, the handrail is installed using the extension portion of the vertical thick end material having the extension portion used in the formwork erection process. It is at the point.

[0007] According to this configuration, the extended portions of each vertical end member used in erecting the rising formwork are utilized as support members for the handrail, eliminating the need to separately prepare dedicated support members for supporting the handrail. As a result, the handrail can be installed as a safety facility that can be used in work following the formwork erection process, without the need to take the time to attach the support members to the formwork. As a result, it is possible to rationally install safety equipment used when constructing reinforced concrete structural members, thereby improving workability and reducing work time required for installing the safety equipment.

[0008] The second characteristic configuration of the present invention is as follows: The extension is supported by a vertical end member. The vertical formwork is an outer formwork used for forming the outer periphery of the framework structure.

[0009] According to this configuration, in work after the formwork erection process, the handrail can be used as a safety device provided around the outer periphery of the skeleton structure to be constructed so as to surround the skeleton structure. As a result, work after the formwork erection process can be carried out in a state where safety equipment is installed around the outer periphery of the framework structure being constructed, ensuring safety.

[0010] A third characteristic configuration of the present invention is that the outer form is included in a beam form used for forming a beam as the outer periphery of the skeleton structure, The handrail installation process is carried out prior to a formwork laying process in which a slab formwork is laid inside the beam formwork, or a slab reinforcing bar arrangement process in which slab reinforcing bars are arranged on the laid slab formwork.

[0011] According to this configuration, the handrail erected in the handrail erection process can be used as safety equipment from the formwork laying process or slab reinforcement process, which are carried out after the formwork is erected, to subsequent concrete pouring processes, in which concrete is poured into the concrete pouring area partitioned off by the formwork. As a result, the formwork laying process, slab reinforcing bar arrangement process, and concrete pouring process, which are carried out after the formwork erection process, can be carried out in a state where safety equipment is installed and safety is ensured. [Brief description of the drawings]

[0012] [Figure 1] A perspective view showing the construction state after the handrail installation process and the formwork laying process are completed. [Diagram 2] A vertical cross-sectional view showing the construction state after the handrail installation process and before the formwork laying process. [Diagram 3] A vertical cross-sectional view showing the construction status after the concrete pouring process has been completed and the foundation has been built. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

[0014] As shown in FIG. 3, in this embodiment, a foundation 10 of a reinforced concrete building is shown as an example of an reinforced concrete skeleton structure. An example of a construction procedure for constructing this foundation 10 will now be described with reference to Figs.

[0015] First, a root cutting process is carried out in which the ground 1 (see Figures 2-3) is excavated to form a foundation construction area 1A (see Figures 2-3) in which the foundation 10 is to be constructed. This is followed by a concrete pouring process in which concrete 2 (see Figures 2-3) is poured into the foundation construction area 1A. After the concrete 2 has been cured, a beam reinforcement process is carried out in which beam main reinforcement 11A and stirrup reinforcement 11B for constructing the underground beam 11 (see Figure 3) included in the foundation 10 are arranged on the concrete 2, and a column main reinforcement process is carried out in which column main reinforcement 11C (see Figure 1) is arranged to enable the erection of a column (not shown) relative to the underground beam 11.

[0016] Next, a form erection process is performed in which a plurality of beam formworks 21, which are an example of rising formwork among the formwork 20 for forming the foundation, are erected along the main beam reinforcement 11A using a plurality of horizontal end members 3 (see Figures 2-3) and vertical end members 4 made of formwork steel pipes with a rectangular cross-section, and after the form erection process, a form laying process is performed in which a plurality of slab formworks 22 (see Figures 1 and 3), which are the bottom slabs for forming the slab among the formwork 20 for forming the foundation, are laid using a plurality of joists 5 (see Figure 3) made of formwork steel pipes with a rectangular cross-section, and a plurality of supports (not shown) that support the joists 5, etc.

[0017] After the formwork 20 is installed, a slab reinforcement arrangement process is carried out in which slab reinforcement 12A (see Figure 3) for constructing the slab 12 (see Figure 3) included in the foundation portion 10 is arranged on the slab formwork 22 using spacers (not shown) or the like, and then a concrete pouring process is carried out in which concrete is poured into the concrete pouring area 1B partitioned off by the beam formwork 21 and the slab formwork 22 while applying moderate vibrations with a vibrator (not shown) to remove internal air bubbles.

[0018] By carrying out the work according to this construction procedure, the foundation 10 can be constructed. Furthermore, if the foundation portion 10 includes an elevator pit or the like, in the formwork erection process, a formwork for molding an elevator pit, which is an example of a rising formwork, can be erected using a plurality of horizontal end thick members 3 and vertical end thick members 4, etc.

[0019] As shown in Figures 2 and 3, each beam formwork 21 includes an outer formwork 21A that is erected on the outside of the underground beam 11 that is formed as the outer periphery of the foundation portion 10, and an inner formwork 21B that is erected on the inside of the underground beam 11.

[0020] As shown in Figs. 1 to 3, among the vertical thick end members 4, each vertical thick end member 4 supporting the outer formwork 21A has an extension portion 4A that extends above the outer formwork 21A. A handrail 6 is installed on the upper side of these extension portions 4A, and a middle rail 7 is installed in the upper and lower middle portions of the extension portions 4A. Therefore, the construction procedure for constructing the foundation 10 includes a handrail installation process for installing the handrail 6 and the middle rail 7 on each of the multiple extension portions 4A. The handrail installation process uses the extension portion 4A of the vertical thick end member 4 supporting the outer formwork 21A of the beam formwork 21 in the formwork installation process, so it is performed immediately after the formwork installation process, which is prior to the formwork laying process in the above-mentioned construction procedure, and the formwork laying process and the like are performed after the handrail installation process.

[0021] In other words, because the handrail installation process is performed before the formwork laying process, the handrails 6 and middle rails 7 erected on the extension portions 4A of the vertical end members 4 in the handrail installation process are installed around the outer periphery of the foundation portion 10 to be constructed as safety equipment that can be used in the construction process when building the foundation portion 10, from the formwork laying process in which multiple slab formwork 22 is laid using multiple joists 5 and shoring, to the slab reinforcing bar arrangement process in which slab reinforcing bars 12A are arranged on the laid slab formwork 22, and the concrete pouring process in which concrete is poured into the concrete pouring area 1B partitioned off by the formwork 20 while applying moderate vibrations with a vibrator to remove internal air bubbles.

[0022] This allows the formwork laying process, slab reinforcement arrangement process, and concrete pouring process, which are carried out after the formwork erection process, to be carried out with safety equipment installed on the outer periphery of the foundation 10 to be constructed, ensuring safety.

[0023] Furthermore, since the extension portions 4A of each vertical end member 4 used in erecting the beam formwork 21 are utilized to support the handrails 6 and middle rails 7, there is no need to separately prepare dedicated support members to support the handrails 6 and middle rails 7. As a result, without the effort of attaching dedicated support members to the beam formwork 21, the handrails 6 and middle rails 7 can be easily installed as safety equipment that can be used in work after the formwork erection process. As a result, the safety equipment used when constructing the RC foundation 10 can be installed rationally, thereby improving workability and shortening the work time required to install the safety equipment. Furthermore, during the formwork installation process, for example when installing a formwork for forming an elevator pit, the vertical end thick material 4 having the aforementioned extension portion 4A can be used for the installation, and in the subsequent handrail installation process, the extension portion 4A can be used to install multiple handrails 6 and center rails 7 in an arrangement that surrounds the elevator pit, etc., as safety equipment for the elevator pit.

[0024] The handrails 6 and middle rails 7 are made of formwork steel pipes with the same rectangular cross-section as the horizontal end members 3, which allows the handrails 6 and middle rails 7 to be fixed to the extension portions 4A of the vertical end members 4 using the same fixing brackets (not shown) that fix the horizontal end members 3 to the vertical end members 4.

[0025] Each handrail 6 is fixed to the extension 4A of the vertical thick end material 4 so that the height position from the top end of the foundation 10 constructed in the foundation construction area 1A is a height in accordance with the Industrial Safety and Health Regulations (for example, a height of 900 mm or more). Each center rail 7 is fixed to the extension 4A of the vertical thick end material 4 so that the height position from the top end of the foundation 10 is a height in accordance with the Industrial Safety and Health Regulations (for example, a height of about 450 mm). The vertical length of each outer formwork 21A is set so that the extension length upward from the top end of the foundation 10 is a length corresponding to the height of a baseboard in accordance with the Industrial Safety and Health Regulations (for example, a height of 100 mm or more).

[0026] This makes it possible to use the handrail 6, center rail 7, and outer formwork 21A as safety equipment, for example, until anchors are driven into the foundation 10 and new safety equipment is installed.

[0027] [Another embodiment] Another embodiment of the present invention will now be described. The configurations of the respective alternative embodiments described below are not limited to being applied alone, but may also be applied in combination with the above-described embodiment or other alternative embodiments.

[0028] (1) In the above embodiment, the handrail erection process is performed immediately after the form erection process, prior to the form laying process of the above-mentioned construction procedure, but the present invention is not limited to this. For example, the handrail erection process may be performed simultaneously with the form erection process. Also, the form erection process may be divided into an outer form erection process for erecting the outer form 21A described above, and an inner form erection process for erecting the inner form 21B described above, and the inner form erection process may be performed immediately after the outer form erection process or after the handrail erection process is performed simultaneously with the outer form erection process.

[0029] (2) In the above embodiment, an example was given of the handrail installation process being performed before the formwork laying process in the construction procedure described above, but this is not limited thereto. For example, the handrail installation process may be performed before the slab reinforcing bar arrangement process and after the formwork laying process. [Explanation of symbols]

[0030] 4 Vertical thick timber 4A Extension 6 Handrails 10 Frame structure 11 Beam (outer periphery of the structure) 12A Slab Reinforcement 21 Beam formwork 21A Outer formwork (standing formwork) 22 Slab Formwork

Claims

1. A method for installing safety equipment used when constructing a reinforced concrete structure, comprising the steps of: A form erection process is performed in which a rising form for forming a framework structure is erected using a plurality of horizontal end members and a plurality of vertical end members, and a handrail erection process is performed in which a handrail is erected using the vertical end members used to support the rising form in the form erection process, The plurality of vertical end members include a vertical end member having an extension portion extending upward from the rising formwork, In the handrail erection process, a handrail is erected using the extension portion of a vertical thick end material having the extension portion used in the formwork erection process.

2. A method for installing safety equipment as described in claim 1, wherein the rising formwork supported by the vertical end thick material having the extension portion is an outer formwork used to mold the outer periphery of the main structure.

3. The outer formwork is included in a beam formwork used for forming a beam as the outer periphery of the skeleton structure, The safety equipment installation method according to claim 2, wherein the handrail installation process is carried out prior to a formwork laying process in which a slab formwork is laid inside the beam formwork, or prior to a slab reinforcing bar arrangement process in which slab reinforcing bars are arranged on the laid slab formwork.

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