Construction methods for modular buildings

Abstract

This invention provides a construction method for modular buildings that allows construction work to proceed on the construction site regardless of weather conditions. [Solution] The method includes a first building unit group formation step in which a first building unit group 1A is formed by sequentially repeating the process of placing multiple building units 10 along their long side direction on a foundation G from which the foundation sheet S has been removed, and then placing them along the short side direction of the building unit 10, and then forming a second building unit group 2A is formed by sequentially repeating the process of placing multiple building units 10 along their long side direction on the upper surface of the building unit row from which the foundation sheet S has been removed, and then placing them along the short side direction of the building unit 10, and in the first building unit group formation step and the second building unit group formation step, the upper surface of each of the formed building unit rows is covered with a foundation sheet S.

Description

Technical Field

[0001] The present invention relates to a construction method for unit buildings.

Background Art

[0002] Some buildings such as houses are composed of unit buildings. A unit building is a building that can be constructed in a short period of time by transporting rectangular parallelepiped building units prefabricated in a factory to a construction site and combining and installing them at the construction site. Although a certain period of time is expected until the unit building is completed, if rainfall occurs during that period, the construction work may be interrupted, so some rainfall countermeasures are required.

[0003] For example, Patent Document 1 discloses an invention related to a rain finishing structure on the upper surface of a building unit. According to the rain finishing structure on the upper surface of the building unit, a waterproof zone and a non-waterproof zone are formed on the upper surface of the building unit, and a temporary rain finishing sheet is attached to the non-waterproof zone so as to cover the non-waterproof zone. A drainage base material for supporting the temporary rain finishing sheet is attached to the lower side of the temporary rain finishing sheet in the non-waterproof zone. With such a configuration, it is possible to perform temporary rain finishing on the building unit so that rainwater does not enter the interior of the building unit from the factory shipment of the building unit until the unit building is completed at the construction site.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, the invention described in Patent Document 1 mainly focused on individual building units during transportation to the construction site. Therefore, there is room for improvement in waterproofing measures when assembling multiple building units at an actual construction site.

[0006] Therefore, the present invention aims to provide a construction method for modular buildings that allows work to proceed at the construction site regardless of weather conditions. [Means for solving the problem]

[0007] To address the above problems, the present invention provides a method for constructing a unit building by installing multiple building units on the foundation of a building, wherein the multiple building units are covered with a foundation sheet placed on the foundation, comprising: a first building unit group formation step in which a first building unit group is formed by sequentially repeating the process of installing multiple building units along their long side direction on the foundation from which the foundation sheet has been removed, thereby forming a row of building units, along the short side direction of the building units; and a second building unit group formation step in which a second building unit group is formed by sequentially repeating the process of installing multiple building units along their long side direction on the upper surface of the row of building units from which the foundation sheet has been removed, thereby forming a row of building units on the upper surface of the first building unit group, along the short side direction of the building units, wherein in the first building unit group formation step and the second building unit group formation step, the upper surface of each of the formed row of building units is covered with the foundation sheet.

[0008] Here, it is desirable that the foundation sheet is fixed to one of the building units by a fixing member that is detachably attached to the column constituting the building unit.

[0009] Furthermore, in the first and second steps, it is desirable to place a gradient generating member between the upper surface of the building unit and the foundation sheet to lift and tilt the foundation sheet. Moreover, it is desirable that the foundation sheet be fixed to a fall prevention member attached to scaffolding installed around the foundation. [Effects of the Invention]

[0010] In the construction method for a modular building of the present invention, a first group of building units is formed by sequentially repeating the process of placing multiple building units along the long side direction on a foundation from which the foundation sheet has been removed, and then placing them along the short side direction of the building units, and then covering the top surface of each of the formed rows of building units with a foundation sheet. Furthermore, a second group of building units is formed by sequentially repeating the process of placing multiple building units along the long side direction on the top surface of a row of building units from which the foundation sheet has been removed, and then placing them along the short side direction of the building units, and then covering the top surface of each of the formed rows of building units with a foundation sheet.

[0011] Therefore, gaps between multiple building units installed along the longer side can be covered with a foundation sheet. Consequently, in actual construction sites, waterproofing measures can be taken using a simple method during rainfall or when rainfall is expected, allowing construction work to proceed regardless of the weather.

[0012] Here, the foundation sheet is fixed to one of the building units by a fixing member that is detachably attached to the columns that make up the building unit. This ensures that the foundation sheet is in close contact with the building unit. By reducing the gap between the foundation sheet and the building unit, the waterproofing effect can be enhanced.

[0013] Furthermore, a gradient generating member is placed between the top surface of the building unit and the foundation sheet to lift and tilt the foundation sheet. This lifts a portion of the foundation sheet, creating a gradient around the lifted point. Consequently, it is possible to prevent rainwater from accumulating on the foundation sheet during rainfall.

[0014] Furthermore, the foundation sheet is fixed to fall prevention members attached to scaffolding installed around the foundation. In other words, since the foundation sheet can be attached to members already in place at the construction site, it can be easily opened and closed. [Brief explanation of the drawing]

[0015] [Figure 1] This figure shows the process of forming a first row of building units in a construction method for a unit building according to an embodiment of the present invention. [Figure 2] This diagram shows the state after the first row of building units has been completed in the construction method of a modular building. [Figure 3] This diagram shows the completed state of the second row of building units in the construction method for modular buildings. [Figure 4] This diagram shows the process of forming the third building unit row in the construction method of a modular building. [Figure 5] This diagram shows the state in which the first group of building units is covered with a foundation sheet during the construction method of a modular building. [Figure 6] This diagram shows the process of forming the fourth building unit row in the construction method of a modular building. [Figure 7] This diagram shows the process of forming the sixth building unit row in the construction method of a modular building. [Figure 8] This diagram shows the second group of building units covered with a foundation sheet in the construction method of a modular building. [Modes for carrying out the invention]

[0016] Hereinafter, an inner wall installation method according to an embodiment of the present invention will be described with reference to the drawings.

[0017] The process of covering the first building unit group 1A with the foundation sheet S (first building unit group forming process) will be described with reference to FIGS. 1 to 5.

[0018] FIG. 1 is a diagram showing the process of forming the first building unit row, and FIG. 2 is a diagram showing the state where the first building unit row is completed. As shown in FIG. 1, a part of the foundation sheet S disposed on the foundation G at the construction site is removed, and the building unit 11 is installed on the removed foundation G.

[0019] Here, the unit building is a structure that can be constructed in a short period of time by being prefabricated in a factory and then transported to the construction site and assembled by arranging it horizontally (D1 or D2) or stacking it vertically at the construction site. The building unit 11 is a box-shaped unit building structure for constructing the unit building, and is substantially rectangular parallelepiped.

[0020] As shown in FIG. 1, the building unit 11 has a unit frame of a box frame structure as a skeleton part inside. The unit frame is mainly composed of four columns, four ceiling beams, and four floor beams. For example, square steel pipes with a rectangular cross section are used for the columns. Although the unit building is composed of a plurality of building units, when each building unit is not particularly distinguished, it will be simply described as the building unit 10.

[0021] As shown in FIG. 2, a plurality of building units 10 are installed along the long side direction (D1) on the foundation G from which the foundation sheet S has been removed to form the first building unit row 10A. Specifically, the foundation sheet S disposed on the foundation G of the building unit 11 and the building unit 12 to be installed is partially removed, and the building unit 11 and the building unit 12 are installed without gaps along the long side direction on the foundation G from which the foundation sheet S has been removed. Among the foundation G, the portion where the first building unit row 10A is not installed is maintained in a state covered with the foundation sheet S.

[0022] Here, building unit 11 and building unit 12 may have the same shape or different shapes. Also, the number of building units 10 constituting the first building unit row 10A may be three or more.

[0023] The foundation sheet S is a flexible sheet material made of waterproof synthetic resin. It is used to cover the foundation G during or when rain is expected, and its size is not particularly limited as long as it can cover the entire foundation G.

[0024] The foundation sheet S is fixed to the building unit 11 or the building unit 12 by fixing members 30 that are detachably attached to the columns constituting the building unit 11 or the building unit 12. For example, as shown in Figure 2, the foundation sheet S is fixed at three locations along the long side direction (D1) of the building unit 10 by fixing members 30.

[0025] The fixing member 30 is made of, for example, a magnet, and the base sheet S is sandwiched and fixed between steel (metal) columns by the magnetic fixing member 30. The fixing member 30 only needs to be attached to the column of any building unit 10 that makes up the first building unit row 10A, and the position where the base sheet S is fixed can be anywhere on the column. Furthermore, the material and shape of the fixing member 30 are not particularly limited as long as it can fix the base sheet S to the building unit 10.

[0026] Gradient generating members 40 are positioned on the upper surfaces of building unit 11 and building unit 12 to lift and tilt the foundation sheet S. The gradient generating members 40 are, for example, stepladders used at construction sites. However, the gradient generating members 40 are not limited to stepladders as long as they can lift a portion of the foundation sheet S upward to create a convex shape.

[0027] Next, a second row of building units 10B is formed adjacent to the first row of building units 10A along the short side direction (D2) of the building unit 10, and a foundation sheet S is placed on the upper surfaces of the first row of building units 10A and the second row of building units 10B. Specifically, as shown in Figure 3, the foundation sheet S is fixed to the scaffolding 100 installed around the foundation G so as to cover the upper surfaces of the four building units 10.

[0028] Similar to the first building unit row 10A, the second building unit row 10B is formed by installing multiple building units 10 without gaps along the longer side direction (D1). The first building unit row 10A and the second building unit row 10B are installed without gaps along the shorter side direction of the building units 10.

[0029] The base sheet S may be positioned to cover the upper surface of the first building unit row 10A when the first building unit row 10A is formed, or it may be positioned to cover the upper surfaces of the first building unit row 10A and the second building unit row 10B only when the first building unit row 10A and the second building unit row 10B are formed.

[0030] By covering the upper surfaces of multiple building units 10 installed along the long side direction (D1) with a foundation sheet S from a direction intersecting the long side direction (D2), the gaps between adjacent building units 10 along the long side direction can be covered by the foundation sheet S. This allows the foundation sheet S to cover areas where gaps are likely to occur during the construction of the unit building. Therefore, damage from rainfall can be minimized even in rainy weather.

[0031] The foundation sheet S is fixed to the fall prevention member 50 by a clamping member 60, such as a clip. The fall prevention member 50 is, for example, a lifeline attached to a support column that makes up the scaffolding 100. As a result, the foundation sheet S is fixed to the scaffolding 100, and can cover the first building unit row 10A and the second building unit row 10B from above.

[0032] A gradient generating member 40 is placed between the foundation sheet S and the upper surface of any of the building units 10 that make up the first building unit row 10A and the second building unit row 10B. As shown in Figure 3, the gradient generating member 40 is placed between the upper surfaces of building units 13 and 14 and the foundation sheet S, and a portion of the foundation sheet S is lifted by the gradient generating member 40, creating a gradient in the foundation sheet S, which is partially convex upward.

[0033] Furthermore, if a portion of the foundation sheet S is lifted, the slope generating member 40 may be placed on the upper surface of any of the building units 10. Also, the slope generating member 40 is not necessarily limited to a stepladder, but may be any member used at a construction site that can generate a slope.

[0034] Next, the foundation sheet S located on the foundation G adjacent to the second building unit row 10B is removed, and a new building unit 10 is installed. For example, as shown in Figure 4, a building unit 15 is installed in the part adjacent to the building unit 13 that makes up the second building unit row 10B.

[0035] Ultimately, as shown in Figure 5, a third building unit row 10C, consisting of building units 15 and 16, is formed on the foundation G adjacent to the second building unit row 10B, thereby forming the first building unit group 1A, which corresponds to the lower floor portion of the unit building. That is, the first building unit group 1A consists of a total of six building units 10: two along the long side direction (D1) of the building unit 10 and three along the short side direction (D2) of the building unit 10.

[0036] In this way, the first building unit group 1A is formed by sequentially repeating the process of placing multiple building units 10 along their long sides on the foundation G from which the foundation sheet S has been removed, and then placing them along the short side of the building units 10. Each building unit 10 constituting the first building unit group 1A is installed without gaps in either the long side direction or the short side direction. The upper surface of the formed first building unit group 1A is covered with the foundation sheet S.

[0037] The number of building units 10 constituting the first building unit group 1A is not particularly limited. Although not specifically shown in the figures, a slope generating member 40 may be provided on the upper surface of at least one of the building units 10 constituting the first building unit group 1A. Furthermore, the foundation sheet S may be fixed to any of the building units 10 constituting the first building unit group 1A using a fixing member 30.

[0038] Next, the process of covering the second building unit group 2A with a foundation sheet S (second building unit group formation process) will be explained with reference to Figures 6 to 8. The process of covering the second building unit group 2A with a foundation sheet S differs from the process of forming the first building unit group 1A in that multiple building units 10 are sequentially installed on the upper surface of the first building unit group 1A. That is, the process of forming the first building unit group 1A and the second building unit group 2A is generally the same, except that the target on which the building units 10 are installed is either the foundation G or the upper surface of the first building unit group 1A.

[0039] Figure 6 shows the process of forming the fourth row of building units, and Figure 7 shows the process of forming the sixth row of building units.

[0040] As shown in Figure 6, a fourth row of building units 20A is formed by installing multiple building units 20 along their long side direction (D1) on the first group of building units 1A from which the foundation sheet S has been removed. Specifically, the foundation sheet S installed on the upper surface of the first group of building units 1A of the building units 21 and 22 to be installed is partially removed, and the building units 21 and 22 are installed without gaps along their long side direction on the first group of building units 1A from which the foundation sheet S has been removed. The portion of the upper surface of the first group of building units 1A from which the fourth row of building units 20A has not been installed remains covered by the foundation sheet S.

[0041] Here, the building unit 20 installed on the first building unit group 1A has a similar configuration to the building unit 10 that make up the first building unit group 1A. The multiple building units 20 that make up the fourth building unit row 20A may have different shapes. Also, the number of building units 20 that make up the fourth building unit row 20A may be three or more. However, it is desirable to install the building units 20 within the range that fits on the upper surface of the first building unit group 1A located below.

[0042] Similar to the case where building units 10 are sequentially installed on the foundation G, the foundation sheet S is partially removed from the upper surface of the first group of building units 1A, and the process of installing the building units 20 along the long side direction (D1) and the short side direction (D2) of the building units 20 is repeated on the upper surface of the first group of building units 1A that is no longer covered by the foundation sheet S.

[0043] As shown in Figure 7, a fifth building unit row 20B, consisting of building units 23 and 24, is installed adjacent to the fourth building unit row 20A, and a building unit 25 is installed adjacent to the fifth building unit row 20B. The upper surfaces of the fourth building unit row 20A and the fifth building unit row 20B are covered with a foundation sheet S.

[0044] Furthermore, even when the building unit 20 is installed on the upper surface of the first building unit group 1A, the foundation sheet S may be fixed to the fall prevention members 50, such as lifelines, attached to the support columns constituting the scaffolding 100 via clamping members 60 such as clips. In addition, although not shown in the illustration, a slope generating member 40 may be placed between the upper surface of the building unit 20 and the foundation sheet S.

[0045] As shown in Figure 8, a second building unit group 2A is formed on the upper surface of the first building unit group 1A, having a fourth building unit row 20A composed of building units 21 and 22, a fifth building unit row 20B composed of building units 23 and 24, and a sixth building unit row 20C composed of building units 25 and 26. That is, the second building unit group 2A, which corresponds to the upper floor portion of the unit building, is composed of a total of six building units 20: two along the long side direction (D1) of the building unit 20 and three along the short side direction (D2) of the building unit 20.

[0046] Thus, in the construction method for a unit building according to this embodiment, a first group of building units 1A constituting the lower floor portion of the unit building is formed by sequentially repeating the process of installing multiple building units 10 along the long side direction on the foundation G from which the foundation sheet S has been removed, along the short side direction of the building units 10, and covering the upper surface of each of the formed rows of building units with the foundation sheet S.

[0047] Furthermore, by sequentially repeating the process of placing multiple building units along their long sides on the upper surface of a row of building units from which the foundation sheets have been removed, thereby forming a row of building units on the upper surface of the first group of building units, along the short side of the building units, a second group of building units that constitutes the upper floor of the unit building is formed, and the upper surface of each of the formed rows of building units is covered with a foundation sheet.

[0048] Therefore, the gaps between multiple building units 10 installed along the longer side can be covered with the foundation sheet S. Consequently, in actual construction sites, waterproofing measures can be taken using a simple method during rainfall or when rainfall is expected, and construction work can proceed at the site regardless of the weather.

[0049] Here, the foundation sheet S is fixed to one of the building units 10 by a fixing member 30 that is detachably attached to the columns constituting the building unit 10. This ensures that the foundation sheet S is in close contact with the building unit 10. This reduces the gap between the foundation sheet S and the building unit 10, thereby enhancing the waterproofing effect.

[0050] Furthermore, a gradient generating member 40 is installed between the upper surface of the building unit 10 and the foundation sheet S to lift and tilt the foundation sheet S. This causes a portion of the foundation sheet S to be lifted, creating a gradient around the lifted position. Therefore, it is possible to prevent rainwater from accumulating on the foundation sheet S during rainfall.

[0051] Furthermore, the foundation sheet S is fixed to a fall prevention member 50 attached to scaffolding 100 installed around the foundation G. In other words, since the foundation sheet S can be attached to components already in place at the construction site, the foundation sheet S can be easily opened and closed.

[0052] While embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and any design modifications that do not depart from the spirit of the present invention are included in the present invention. [Explanation of symbols]

[0053] 1A: Building Unit Group 1 2A: Second building unit group 10: Building Unit 10A: First building unit row 10B: Second building unit row 10C: Third building unit row 11: Building Unit 12: Building Unit 13: Building Unit 14: Building Unit 15: Building Unit 16: Building Unit 20: Building Unit 20A: Fourth building unit row 20B: Fifth building unit row 20C: Row of 6 building units 21: Building Unit 22: Building Unit 23: Building Unit 24: Building Unit 25: Building Unit 26: Building Unit 30: Fixing member 40: Gradient generating member 50: Fall prevention component 60: Holding member 100: Scaffolding G: Foundation S: Base sheet

Claims

1. A method for constructing a modular building, in which multiple building units are placed on the foundation of a building to construct a modular building, and the multiple building units are covered with a foundation sheet placed on the foundation, A first building unit group formation step involves sequentially repeating the process of placing multiple building units along their long sides on the foundation from which the foundation sheet has been removed, thereby forming a row of building units, along the short side of the building units, to form a first group of building units. The process includes a second building unit group formation step, in which a second building unit group is formed by sequentially repeating the process of forming a row of building units on the upper surface of the row of building units from which the base sheet has been removed, along the direction of the long side of the building units, along the direction of the short side of the building units, thereby forming a row of building units on the upper surface of the first building unit group. A method for constructing a modular building, characterized in that, in the first building unit group formation step and the second building unit group formation step, the upper surface of each of the formed rows of building units is covered with the foundation sheet.

2. The construction method for a modular building according to claim 1, characterized in that the foundation sheet is fixed to any of the building units by a fixing member that is detachably attached to the columns constituting the building unit.

3. The construction method for a unit building according to claim 1 or 2, characterized in that in the first building unit group formation step and the second building unit group formation step, a gradient generating member is placed between the upper surface of the building unit and the foundation sheet to lift and tilt the foundation sheet.

4. The construction method for a unit building according to claim 1 or 2, characterized in that the foundation sheet is fixed to a fall prevention member attached to scaffolding installed around the foundation.

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