Temporary scaffolding assembly method

Abstract

To provide a temporary scaffold assembly method excellent in workability and capable of reducing costs.SOLUTION: A temporary scaffold assembly method when dismantling dioxin-contaminated facilities (exhaust gas treatment tower 1, dust collector 2, chimney 3, ash pit 4, temperature reduction tower 5, incinerator 6, flue 70, 71, 72, 73) in accordance with guidelines for preventing exposure to dioxins during work in waste incineration facilities, comprises the steps of: installing a heavy temporary structure 21 by extending a steel material 20 in the vertical direction and the horizontal direction of a steel frame 10 installed around the dioxin contaminated facility (exhaust gas treatment tower 1, dust collector 2, chimney 3, ash pit 4, temperature reduction tower 5, incinerator 6, flue 70, 71, 72, 73), and installing a framework scaffolding 100 by wall-connecting the heavy temporary structure 21 and the steel frame 10 to a temporary scaffold 30.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for assembling temporary scaffolding, and more particularly to a method for assembling temporary scaffolding when dismantling dioxin-contaminated equipment in accordance with the guidelines for preventing exposure to dioxins during work within a waste incineration facility. [Background technology]

[0002] When dismantling dioxin-contaminated equipment in accordance with the guidelines for preventing dioxin exposure during work within waste incineration facilities, the equipment must be sealed and cured.

[0003] A conventional method for dismantling a dioxin-contaminated small incinerator is, for example, an integrated dismantling method in which, "in dismantling a dioxin-contaminated small incinerator, a sealed container is processed with rubber sheets to encase the structure, and the container is equipped with a structure high-pressure washing device, a structure dismantling device, a dust treatment sprinkler device, a contaminated water conveyance pump device, a super-activated carbon adsorption device, a structure debris mixing device, and waterproof lighting equipment, and the dioxin-contaminated small incinerator is cleaned and dismantled, the dioxin in the contaminated washing water is adsorbed by the super-activated carbon, and in the final process the structure debris, contaminated washing water, and used super-activated carbon are mixed with cement and a special solidifying agent to produce a harmless solidified product" (Patent Document 1).

[0004] Dioxin-contaminated equipment includes, for example, exhaust gas treatment towers, dust collectors, incinerators, ash pits, cooling towers, chimneys, and flues, but because they are all at different heights, in the past, dioxin-contaminated equipment was individually covered with frame scaffolding and individually sealed and cured (see Figures 3 and 4).This resulted in problems such as a small working space for frame scaffolding, poor workability, longer construction times, and higher costs due to the need for separate frame scaffolding and curing tents. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-052727 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a method for assembling temporary scaffolding that is easy to work with and can reduce costs. [Means for solving the problem]

[0007] The temporary scaffolding assembly method of the present invention is a temporary scaffolding assembly method for dismantling dioxin-contaminated equipment in accordance with the Guidelines for Measures to Prevent Exposure to Dioxins During Work Within Waste Incineration Facilities, and is characterized by comprising the steps of: installing heavy temporary structures by extending steel members vertically and horizontally of a steel frame structure installed around the dioxin-contaminated equipment; and installing framework scaffolding by connecting the heavy temporary structures and the steel frame structure to the temporary scaffolding via walls. [Effects of the Invention]

[0008] According to the present invention, it is possible to achieve excellent workability and low costs. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a plan view illustrating an assembly method for a temporary scaffold according to an embodiment of the present invention. [Figure 2] FIG. 1 is an elevation view illustrating an assembly method for a temporary scaffold according to an embodiment of the present invention. [Figure 3] FIG. 1 is a plan view illustrating a conventional method for assembling temporary scaffolding. [Figure 4] FIG. 1 is an elevation view illustrating a conventional assembly method for temporary scaffolding. DETAILED DESCRIPTION OF THE INVENTION

[0010] <Summary> A temporary scaffolding assembly method according to one embodiment of the present invention is a temporary scaffolding assembly method for dismantling dioxin-contaminated equipment in accordance with the Guidelines for Measures to Prevent Exposure to Dioxins During Work Within Waste Incineration Facilities, and is characterized by comprising the steps of: installing heavy temporary structures by extending steel members vertically and horizontally of a steel frame structure installed around the dioxin-contaminated equipment; and installing framework scaffolding by connecting the heavy temporary structures and the steel frame structure to the temporary scaffolding via walls. According to this aspect, it is possible to improve workability and reduce costs.

[0011] <Embodiment> Hereinafter, a method for assembling a temporary scaffold according to one aspect of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the following embodiment.

[0012] Fig. 1 is a plan view illustrating a method for assembling a temporary scaffold according to an embodiment of the present invention, and Fig. 2 is an elevation view illustrating a method for assembling a temporary scaffold according to an embodiment of the present invention.

[0013] Here, a case will be described in which the dioxin-contaminated facilities are an exhaust gas treatment tower 1, a dust collector 2, a chimney 3, an ash pit 4, a cooling tower 5, an incinerator 6, and flue gases 70, 71, 72, and 73.

[0014] 1. Overall structure The assembly method for the temporary scaffolding of this embodiment comprises the following steps. First, heavy temporary structures 21 are installed by extending steel members 20 vertically and horizontally on the steel frame structure 10 installed around the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, ash pit 4, cooling tower 5, chimney 3, incinerator 6, flue ducts 70, 71, 72, 73).

[0015] In this embodiment, heavy temporary structure 21 refers to a structure composed of steel materials 20 (columns) extending vertically from the steel frame structure 10 and steel materials 20 (beams) extending horizontally, or steel materials installed vertically from the earth floor when necessary to perform sealed curing in areas where steel frame structure 10 does not exist.

[0016] Next, the temporary scaffolding 30 is wall-to-wall connected to the steel frame structure 10 and the heavy temporary structure 21 to form the framework scaffolding 100.

[0017] Finally, a protective tent 60 is set up to cover the entire framework scaffolding 100, sealing off the dioxin-contaminated equipment.

[0018] Since the dioxin-contaminated equipment differs in height, it has conventionally been sealed and cured individually (see Figures 3 and 4 of the comparative example described below). In this embodiment, temporary scaffolding 30 is erected around the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, ash pit 4, cooling tower 5, chimney 3, incinerator 6, flue ducts 70, 71, 72, 73), and so-called heavy temporary structures 21 are installed, making it possible to assemble a large framework scaffolding 100. This makes it possible to ensure sufficient work space, improving workability.

[0019] 2. Dioxin-contaminated facilities In this embodiment, the dioxin-contaminated equipment is described as being an exhaust gas treatment tower 1, a dust collector 2, an ash pit 4, a cooling tower 5, a chimney 3, an incinerator 6, and flues 70, 71, 72, and 73, but is not limited thereto and may be an exhaust gas cooling equipment, a smoke washing equipment, a wastewater treatment equipment, a waste heat boiler, a sludge melting furnace, etc. In addition, there may be one or more dioxin-contaminated equipment, and there is no limitation on the combination of multiple equipment.

[0020] 3. Steel frame 10 The steel frame 10 has a main structural body consisting of columns and beams, and is not particularly limited as long as it is generally used in the field of building construction.

[0021] 4. Steel material 20 The type and shape of the steel material 20 are not particularly limited, but H-beam or square steel is preferable.

[0022] 5. Heavy Temporary Construction 21 There are no particular restrictions on the height of the steel material 20 to be installed vertically on the steel frame structure 10, as long as it is high enough to install the protective tent 60. It is preferable to determine the height based on the planned contents of the demolition work, using the tallest piece of equipment (exhaust gas treatment tower 1 in this case, see Figure 2) among the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, incinerator 6, ash pit 4, cooling tower 5, chimney 3) as the base.

[0023] 6. Temporary scaffolding 30 The temporary scaffolding 30 is connected horizontally to surround the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, ash pit 4, cooling tower 5, chimney 3, incinerator 6, flue ducts 70, 71, 72, 73).

[0024] In addition, the temporary scaffolding 30 is connected vertically to a height slightly higher than the height of the heavy temporary structure 21.

[0025] The temporary scaffolding 30 in this embodiment is not particularly limited, and examples include single-pipe scaffolding, wedge-type scaffolding, frame scaffolding, suspended scaffolding, and mobile scaffolding.

[0026] 7. Wall ties 40 The wall ties 40 are used to connect the temporary scaffolding 30 to the steel frame structure 10 or the heavy temporary structure 21, in order to prevent the temporary scaffolding 30 from collapsing or deforming. There are no particular limitations on the wall ties 40 in this embodiment, as long as they meet the installation standards stipulated in the Industrial Safety and Health Regulations.

[0027] 8. Protection Tent 60 The protective tent 60 in this embodiment is not particularly limited as long as it meets the standards pursuant to the Guidelines for Prevention of Exposure to Dioxins.

[0028] 9. In accordance with the guidelines for preventing exposure to dioxins In this embodiment, "in accordance with the Guidelines for Preventive Measures against Exposure to Dioxins" includes not only the Guidelines for Preventive Measures against Exposure to Dioxins, but also dioxin countermeasure construction and the like stipulated in the original ordinances of prefectures (for example, Yokohama City, etc.).

[0029] 10.Framework Scaffolding 100 In this embodiment, the framework scaffolding 100 refers to an assembly of temporary scaffolding 30 connected horizontally and vertically. The framework scaffolding 100 here is arranged so as to surround the dioxin contamination equipment (exhaust gas treatment tower 1, dust collector 2, ash pit 4, cooling tower 5, chimney 3, incinerator 6, and flues 70, 71, 72, and 73) (see FIG. 1), and is installed vertically to a height slightly higher than the height of the heavy temporary structure 21.

[0030] <Comparative Example> Fig. 3 is a plan view illustrating a conventional method for assembling temporary scaffolding. Fig. 4 is an elevation view illustrating a conventional method for assembling temporary scaffolding.

[0031] Here, as in the previous embodiment (see Figures 1 and 2), we will explain the case where the dioxin-contaminated equipment is an exhaust gas treatment tower 1, a dust collector 2, an ash pit 4, a cooling tower 5, a chimney 3, an incinerator 6, and flue gases 70, 71, 72, and 73.

[0032] As mentioned above, these dioxin-contaminated facilities are at different heights, so they have traditionally been individually sealed and cured. That is, as shown in Figure 3, framework scaffolding 101-108 was erected and each facility was individually cured in curing tents 61-63, etc.

[0033] 1.Frame Scaffolding 101 As shown in FIG. 3, a framework scaffolding 101 is erected around the exhaust gas treatment tower 1 and the dust collector 2, and the structure is sealed and cured in a curing tent (not shown).

[0034] 2.Frame Scaffolding 102 As shown in FIG. 3, a framework scaffolding 102 is erected around the chimney 3, and the chimney 3 is sealed and cured in a curing tent (not shown).

[0035] 3.Frame Scaffolding 103 As shown in FIG. 3, a framework scaffolding 103 is erected around the ash pit 4, and the ash pit 4 is sealed and cured in a curing tent (not shown).

[0036] 4.Framework Scaffolding 104 As shown in FIG. 3, a framework scaffolding 104 is erected around the cooling tower 5, and as shown in FIG. 4, the cooling tower 5 is sealed and cured in a curing tent 63.

[0037] 5.Framework Scaffolding 105 As shown in FIG. 3, a framework scaffolding 105 is erected around the incinerator 6 and the flue 73, and as shown in FIG. 4, the structure is sealed and cured in a curing tent 61.

[0038] 6.Framework Scaffolding 106 As shown in FIG. 3, a framework scaffolding 106 is erected around the flue 70 connecting the exhaust gas treatment tower 1 and the ash pit 4, and the framework is sealed and cured in a curing tent (not shown).

[0039] 7.Framework Scaffolding 107 As shown in FIG. 3, a framework scaffolding 107 is erected around the flue 71 connecting the ash pit 4 and the cooling tower 5, and the structure is sealed and cured in a curing tent (not shown).

[0040] 8.Framework Scaffolding 108 A framework scaffolding 108 is erected around the flue 72 connecting the cooling tower 5 and the flue 73, and the structure is sealed and cured in a curing tent 62 as shown in FIG.

[0041] As described above, in conventional construction methods, the heavy temporary structure 21 as in the present embodiment is not installed. Therefore, when the temporary scaffolding 30 is extended vertically, the wall ties 41 connecting the upper temporary scaffolding 31 and the steel frame 10 must be arranged at an angle, which makes the framework scaffolding 105 unstable (see FIG. 4). Therefore, it is not possible to arrange the framework scaffolding 100 (see FIG. 1) so as to surround the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, ash pit 4, cooling tower 5, chimney 3, incinerator 6, and flue ducts 70, 71, 72, and 73) as in the present embodiment. Therefore, framework scaffolding 101-108 is required individually, and because the framework scaffolding 101-108 has different heights, it is necessary to cover each of them individually in a protection tent 61-63. Therefore, there were problems such as the small working space of the framework scaffolding 101 to 108, which made work less efficient, and the need for separate framework scaffolding and protective tents, which increased costs.

[0042] <Modification> Although the assembly method for temporary scaffolding according to one embodiment has been described above, the present invention is not limited to this embodiment and may be modified as follows, for example. Furthermore, the present invention may be a combination of the embodiment and the modified examples, or a combination of the modified examples. Furthermore, examples not described in the embodiment or modified examples, and design changes within the scope of the gist of the present invention are also included.

[0043] 1. Dioxin-contaminated facilities In the embodiment, the dioxin-contaminated equipment is described as an exhaust gas treatment tower 1, a dust collector 2, a chimney 3, an ash pit 4, a cooling tower 5, an incinerator 6, and flues 70, 71, 72, and 73), but is not limited thereto and may be an exhaust gas cooling equipment, a smoke washing equipment, a wastewater treatment equipment, a waste heat boiler, a sludge melting furnace, etc. Furthermore, there may be one or more dioxin-contaminated equipment, and there is no limitation on the combination of multiple equipment.

[0044] 2. Heavy temporary construction Although the heavy temporary structure 21 is constructed by extending the steel members 20 in the vertical and horizontal directions of the steel frame 10, the installation method of the steel members 20 (number, installation direction, etc.) is not limited to this.

[0045] In the embodiment, the predetermined height of the heavy temporary structure 21 is set based on the exhaust gas treatment tower 1, but is not limited to this.

[0046] 3.Frame scaffolding According to the temporary scaffolding assembly method of the embodiment of the present invention, all of the dioxin-contaminated equipment (exhaust gas treatment tower 1, dust collector 2, chimney 3, ash pit 4, cooling tower 5, incinerator 6, and flue ducts 70, 71, 72, and 73) are enclosed in a single frame scaffolding 100, but this is not limited to this. It is also possible to group together dioxin-contaminated equipment of similar height or installation location into multiple frame scaffoldings. For example, it is possible to install frame scaffolding around the exhaust gas treatment tower 1, dust collector 2, chimney 3, and ash pit 4, and another frame scaffolding around the cooling tower 5, incinerator 6, and chimney 3. [Explanation of symbols]

[0047] 1. Exhaust gas treatment tower 2 Dust collector 3. Chimney 4 Ash Pit 5. Cooling tower 6 Incinerator 70 flue 71 Flue 72 Flue 73 Flue 10 Steel frame 20 Steel 21 Heavy Temporary Construction 22 Heavy Temporary Construction 30 Temporary scaffolding 40 Wall Tie 60 Protection Tent 100 Frame Scaffolding

Claims

1. A temporary scaffolding assembly method for dismantling dioxin-contaminated equipment in accordance with the guidelines for preventing dioxin exposure during work in waste incineration facilities. a step of installing heavy temporary structures by extending steel members in the vertical and horizontal directions of a steel frame installed around the dioxin-contaminated facility; a step of installing a framework scaffold by connecting the heavy temporary structure and the steel frame structure to the temporary scaffold; A temporary scaffolding assembly method characterized by comprising:

2. If there are multiple dioxin-contaminated facilities, surround all of the dioxin-contaminated facilities with the framework scaffolding. A method for assembling the temporary scaffolding according to claim 1.

3. and sealing the dioxin-contaminated equipment with a curing sheet. A method for assembling a temporary scaffold according to claim 1 or 2.

4. The dioxin-contaminated equipment is a waste incinerator, a dust collector, a flue equipment, a flue gas cooling equipment, a smoke washing equipment, a wastewater treatment equipment, a waste heat boiler, or a sludge melting furnace. A method for assembling a temporary scaffolding according to any one of claims 1 to 3.

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