Low-temperature warehouses and construction methods for low-temperature warehouses

Abstract

To provide a building structure and a construction method of the building structure capable of suppressing stress creation and deformation due to cooling.SOLUTION: A cold storage comprises a storage space cooled in low temperature, wherein a seismic isolator 18 is placed between an upper foundation 12 and a lower foundation 11 of a foundation F1. The cold storage comprises side surface heat insulation material 31 covering a side surface of a second installation part 12a of the upper foundation 12, and side surface heat insulation material 32a, 33a and bottom surface heat insulation material 32b, 33b covering side surfaces and lower surfaces of large beams 12a, 12c of the upper foundation 12, respectively. Further, the cold storage is provided with underfloor heat insulation material 17 covering a lower surface of a slab body 16 of a first floor slab 15.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a refrigerated warehouse or the like that stores frozen goods, refrigerated goods, etc. at a low temperature of 10°C or lower and is equipped with a seismic isolation device, Low-temperature warehouse and Low-temperature warehouse to its construction method.

Background Art

[0002] Conventionally, frozen goods and refrigerated goods are sometimes stored in freezer-refrigerator warehouses cooled to a low temperature of 10°C or lower. In such freezer-refrigerator warehouses, the cooling heat that cools the interior is also transmitted to the building structures (beams, floor slabs, etc.), so after construction, the building structures and the like contract, resulting in stress and deformation caused by cooling. Accordingly, in order to absorb the stress and deformation, the building configuration of a refrigerated warehouse using a seismic isolation device has been studied (see, for example, Patent Document 1). The seismically isolated refrigerated and frozen warehouse described in Patent Document 1 is provided with a seismic isolation device between the lower structure and the upper structure. The connecting member is connected to the lower foundation structure by passing a connecting steel material through a loose hole in the connecting member between the seismic isolation device and the lower foundation structure and tightening the same. A sliding material and a gap around the connecting member are provided between the connecting member and the lower foundation structure, so that the connecting member is made movable relative to the lower foundation structure in the horizontal direction before cooling. After cooling, the loose holes and the gaps are filled with a filler and cured to bring the connecting member into a rigidly connected state with the lower foundation structure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Traditionally, to minimize stress and deformation caused by cooling, refrigerated warehouses were constructed in small blocks and then integrated later. In this case, temporary heat-insulating walls were required to cool each block. Consequently, costs were high and construction periods were extended.

[0005] Furthermore, in the aforementioned Patent Document 1, the connecting members are configured to be movable relative to the lower foundation structure before and during cooling, taking into account the thermal contraction and deformation of the superstructure due to cooling. However, in buildings, there are other heat influences besides cooling heat, such as heat intrusion through heat conduction from walls and ceilings, heat generated from blowers, and ventilation heat generated during loading and unloading. Therefore, construction that takes these heat influences into account has been difficult. [Means for solving the problem]

[0006] The above challenges can be addressed. Low-temperature warehouse It comprises a seismic isolation layer with seismic isolation devices installed between the lower and upper foundations of the building, and a floor slab of the lowest floor installed on the upper foundation, and has a storage space cooled to a low temperature. Low-temperature warehouse Therefore, at least the underside of the floor slab of the lowest floor is covered with an underfloor heat-insulating member. The sides of the upper foundation were covered with side insulation material, and the underside of the upper main beam of the upper foundation was covered with bottom insulation material. Furthermore, a low-temperature warehouse that solves the above problems comprises a seismic isolation layer with seismic isolation devices installed between the lower foundation and the upper foundation of the building, and a floor slab of the lowest floor installed on the upper foundation, and has a storage space cooled to a low temperature, wherein at least the lower surface of the floor slab of the lowest floor is covered with an underfloor heat-insulating member, A column side insulation material covering the outer circumference of the lower part of a column member erected on the upper foundation, and a floor insulation material connected to the column side insulation material and covering the floor slab of the lowest floor surrounding the column member, The floor slab comprises a floor main body portion that constitutes the floor surface, a column peripheral portion on which the floor insulation material is placed, and a stepped portion having a step that connects the floor main body portion and the column peripheral portion. A retaining concrete member is formed on the floor insulation material, and the retaining concrete member is formed to a thickness that is flush with the upper surface of the floor main body portion.

[0007] Furthermore, to solve the above problems Low-temperature warehouse The construction method is, A method for constructing a low-temperature warehouse having a storage space cooled to a low temperature, comprising a seismic isolation layer with seismic isolation devices installed between the lower foundation and the upper foundation of the building, and the lowest floor slab installed on the upper foundation, wherein after constructing the lower foundation, the seismic isolation devices are installed on the lower foundation, the upper foundation is constructed on the seismic isolation devices, the sides of the upper foundation are covered with side insulation material, the underside of the upper main beam of the upper foundation is covered with bottom insulation material, and the underside of the lowest floor slab, which is constructed to be integrated with the upper foundation, is covered with underfloor heat-insulating material. Furthermore, The above challenges can be addressed. Low-temperature warehouse The construction method includes a seismic isolation layer with seismic isolation devices installed between the lower and upper foundations of the building, and a floor slab of the lowest floor installed on the upper foundation, and has a storage space cooled to a low temperature. Low-temperature warehouseA construction method comprising: providing a column side insulation material that covers the outer circumference of the lower part of a column member erected on the upper foundation, and a floor insulation material connected to the column side insulation material and covering the floor slab of the lowest floor surrounding the column member, and then forming a retaining concrete member on the floor insulation material; After constructing the floor slab of the lowest floor, An underfloor heat-insulating member is provided to cover the underside of the floor slab of the lowest floor. [Effects of the Invention]

[0008] According to the present invention, it is possible to suppress the generation of stress and deformation caused by cooling. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic diagram illustrating the overall structure of a building according to the embodiment. [Figure 2] This is a cross-sectional view of the main part of the building structure in the embodiment. [Figure 3] This is a cross-sectional view of the main part of the building structure in the embodiment. [Figure 4] This is a cross-sectional view of the main part of the building structure in the embodiment. [Modes for carrying out the invention]

[0010] The following uses Figures 1 to 4: Low-temperature warehouse and Low-temperature warehouse This section describes one embodiment of the construction method. Here, we assume an F1 class cold storage warehouse with a space where contents are stored at temperatures below 10 degrees Celsius, with temperatures around -25°C (-20°C to less than -30°C). For example, we assume that this cold storage warehouse is constructed as a three-story building with dimensions of approximately 350m x 100m. Furthermore, this cold storage warehouse is constructed with a seismic isolation structure that has a seismic isolation layer with seismic isolation devices installed between the lower foundation and the upper foundation.

[0011] Figure 1 is a schematic cross-sectional view illustrating the configuration of the freezer warehouse 10, and Figures 2 to 4 are vertical cross-sectional views of the main parts (first-floor floor slab and foundation) of the freezer warehouse 10. Figure 2 is a cross-sectional view of upper large girders 12b and 12c extending in the direction perpendicular to the paper surface, Figure 3 is a cross-sectional view at the end of the column member 22 arranged on the inner side of the building, and Figure 4 is a cross-sectional view at the center of the column member 22. In Figures 3 and 4, the seismic isolation device 18 described later is shown without being sectioned.

[0012] As shown in Figure 1, the freezer warehouse 10 is a building having a storage space that is cooled to about minus 25°C to store frozen products and the like. This freezer warehouse 10 has a foundation F1, a first-floor floor slab 15, a plurality of column members 21 and 22, a second-floor floor slab 27, a third-floor floor slab 28, and a roof slab 29. Here, the column members 21 and 22 are erected on the foundation F1, and the first-floor floor slab 15 is provided between the column members 21 and 22. The column member 21 denotes a member constituting a column arranged on the outer periphery of the freezer warehouse 10, and the column member 22 denotes a member constituting a column arranged on the inner side of the freezer warehouse 10.

[0013] The foundation F1 shown in Figure 2 includes a lower foundation 11 and an upper foundation 12. The lower foundation 11 includes a first installation portion 11a that protrudes directly upward below the column members 21 and 22 of the freezer warehouse 10. The first installation portion 11a has a substantially rectangular horizontal cross-section.

[0014] The upper foundation 12 has a second installation portion 12a and upper large girders 12b and 12c. As shown in Figure 3, the second installation portion 12a is provided to protrude downward so as to face the first installation portion 11a. Like the first installation portion 11a, the second installation portion 12a has a substantially rectangular horizontal cross-section. A seismic isolation device 18 is provided between each of the first installation portions 11a and the second installation portions 12a. In the present embodiment, a seismic isolation device of a laminated rubber bearing is used as the seismic isolation device 18.

[0015] The upper girders 12b, 12c support the skeleton of the refrigerated warehouse 10. Here, the upper girders 12b and 12c respectively represent a portion extending in the paper surface direction and a portion extending in the left-right direction of the drawing. These upper girders 12b, 12c are provided so as to extend on the central axis of the second installation portion 12a.

[0016] Further, the side surfaces and the bottom surface of the upper foundation 12 are covered with a heat insulating material except for the portions where the seismic isolation device 18 abuts. Specifically, a side surface heat insulating material 31 is arranged on the outer periphery of the side surface of the second installation portion 12a of the upper foundation 12. Here, no heat insulating material is arranged on the lower surface of the second installation portion 12a that abuts on the seismic isolation device 18.

[0017] Further, as shown in Figure 2, heat insulating materials 32 and 33 are arranged on the outer peripheries of the upper girders 12b and 12c, respectively. Specifically, a continuous side surface heat insulating material 32a and a bottom surface heat insulating material 32b are provided on the side surface and the bottom surface of the upper girder 12b. Further, a continuous side surface heat insulating material 33a and a bottom surface heat insulating material 33b are provided on the side surface and the bottom surface of the upper girder 12c. These heat insulating materials 32, 33 are configured by, for example, attaching Styrofoam (registered trademark) or the like, or spraying a heat insulating material such as rigid urethane foam or rock wool.

[0018] Note that, as shown in Figure 4, the bottom surface heat insulating material 33b covering the lower surface of the upper girder 12c is also connected to the side surface heat insulating material 31 of the second installation portion 12a. A first-floor floor slab 15 is integrally formed on the upper surface of the upper foundation 12.

[0019] As shown in Figure 3, the first-floor floor slab 15 includes a slab main body 16 and an underfloor heat insulating member 17. The slab main body 16 is made of reinforced concrete, and has a floor main body portion 16a, a connection portion 16b, and a column peripheral portion 16c. The floor main body portion 16a is a portion constituting substantially the entire surface of the first-floor floor slab 15, and the upper surface thereof serves as the floor surface of the first floor. The column peripheral portion 16c is located around the column member 22 and is formed at a position lower than the floor main body portion 16a. The connection portion 16b is a stepped portion that connects the floor main body portion 16a and the column peripheral portion 16c.

[0020] The underfloor heat-insulating member 17 is an insulating material positioned to cover the underside (bottom surface and sides) of the slab body 16. Specifically, the underfloor heat-insulating member 17 comprises a first bottom surface portion 17a that covers the bottom surface of the floor body portion 16a, a side surface portion 17b that covers the sides of the connection portion 16b, and a second bottom surface portion 17c that covers the bottom surface of the connection portion 16b and the bottom surface of the column surrounding portion 16c. This underfloor heat-insulating member 17 is made of the same material as the insulating materials 32 and 33.

[0021] The outer periphery of the lower part of the column member 22 and the surrounding first-floor slab 15 are covered with insulation material 40. This insulation material 40 is made of the same material as insulation materials 32 and 33. The insulation material 40 comprises a column side insulation material 41 that covers the outer periphery of the lower side of the column member 22, and a floor insulation material 42 that covers the first-floor slab 15 around the column member 22. The column side insulation material 41 is, for example, about 2 m high from the top surface of the first-floor slab 15. The floor insulation material 42 in this embodiment is formed by being placed on the column peripheral portion 16c of the slab body 16 of the first-floor slab 15. The horizontal cross-sectional shape of this floor insulation material 42 is, for example, a square shape centered on the column member 22, and extends about 2 m from the column member 22.

[0022] Furthermore, a retaining concrete member 45 is formed on top of the floor insulation material 42 of the insulation material 40. This retaining concrete member 45 is made with a thickness that is flush with the upper surface of the floor body portion 16a of the slab body 16 of the first floor slab 15. In addition, the peripheral portion 45a of this retaining concrete member 45 on the column member 22 side is slightly raised, and it presses down on the lowest part of the column side insulation material 41 of the insulation material 40.

[0023] (Construction of a cold storage warehouse) Next, we will explain the construction method for the cold storage warehouse 10 described above. First, the foundation F1 of the cold storage warehouse 10 is constructed. Specifically, after constructing the lower foundation 11 of foundation F1, a seismic isolation device 18 is installed on the first installation section 11a of this lower foundation 11. Then, the upper foundation 12, which has a second installation section 12a and upper main beams 12b and 12c located above the seismic isolation device 18, is constructed. Furthermore, the slab body 16 and column members 21 and 22 of the first-floor floor slab 15 are constructed of reinforced concrete so as to be integrated with the upper foundation 12. After that, the second-floor floor slab 27, the third-floor floor slab 28, and the rooftop slab 29 are constructed using the column members 21 and 22.

[0024] Furthermore, insulation material is placed on the sides of the upper foundation 12. Specifically, on the upper foundation 12, side insulation material 31 is placed on the side of the second installation section 12a. Furthermore, side insulation material 32a and bottom insulation material 32b are placed on the sides and bottom of the upper main beam 12b, respectively, and side insulation material 33a and bottom insulation material 33b are placed on the sides and bottom of the upper main beam 12c, respectively.

[0025] Furthermore, when the slab body 16 of the first-floor floor slab 15 is constructed, an underfloor heat-insulating member 17 is placed on the underside of the slab body 16. Specifically, the underside of the floor body portion 16a of the slab body 16, the side surface of the connection portion 16b, the underside of the connection portion 16b, and the underside of the column surrounding portion 16c are covered with a first underside portion 17a, a side portion 17b, and a second underside portion 17c, respectively.

[0026] Then, the insulation material 40 is placed on the outer circumference of the lower part of the column member 22 and on the column surrounding portion 16c of the slab body 16, such that the column side insulation material 41 and the floor insulation material 42 correspond to each other. Next, a retaining concrete member 45 is poured onto the column perimeter 16c of the slab body 16 on top of the insulation material 40. In this case, the retaining concrete member 45 is formed so that its upper surface is flush with the upper surface of the floor body portion 16a of the slab body 16.

[0027] Then, after the cold storage warehouse 10 is completed, the interior space is cooled. In this case, the first-floor slab 15 and the upper foundation 12 also contract due to the cooling. The upper part of the seismic isolation device 18 may also move in accordance with the direction of contraction of the upper foundation 12.

[0028] (action) By covering the underside of the first-floor slab 15 and the upper foundation 12 with insulation material, a heat-insulating structure is created beneath the first-floor slab 15 and the upper foundation 12. As a result, the slab body 16 of the first-floor slab 15 and the upper foundation 12 of the cold storage warehouse 10 above the seismic isolation device 18 will contract in the same way as the structure above them due to temperature changes.

[0029] According to this embodiment, the following effects can be obtained. (1) In this embodiment, the underside of the slab body 16 of the first-floor floor slab 15 is covered with an underfloor heat-insulating member 17. Furthermore, side insulation materials 31, 32a, and 33a are provided on the sides of the upper foundation 12, and bottom insulation materials 32b and 33b are provided on the bottom surfaces of the upper main beams 12b and 12c. As a result, the first-floor floor slab 15 is cooled in the same way as the floor slabs (27, 28) of the second and third floors. Therefore, the first-floor floor slab 15, which is the lowest floor of the cold storage warehouse 10 on the seismic isolation device 18, also shrinks due to temperature in the same way as the floor slabs (27, 28) of the upper floors, so that excessive stress is not generated in the structure of the cold storage warehouse 10. Accordingly, it is possible to make it difficult for stress and deformation due to cooling to occur in the first-floor floor slab 15 and the upper foundation 12.

[0030] (2) In this embodiment, the seismic isolation device 18 is directly installed on the lower surface of the second installation portion 12a of the upper foundation 12. This ensures that the force applied to the upper foundation 12 is reliably transmitted to the seismic isolation device 18.

[0031] (3) In this embodiment, column side insulation material 41 is provided on the outer circumference of the lower part of the column member 22 positioned above the seismic isolation device 18, and floor insulation material 42 is also provided on the column surrounding portion 16c of the slab body 16. This lengthens the heat transfer path from the cooling area to the seismic isolation device 18, thereby suppressing the cooling of the seismic isolation device 18 and maintaining seismic isolation performance.

[0032] (4) In this embodiment, a retaining concrete member 45 is provided on top of the floor insulation material 42 provided on the column peripheral portion 16c of the slab body 16, such that the upper surface of the retaining concrete member 45 is flush with the upper surface of the floor body portion 16a of the slab body 16. This makes it possible to make the floor surface of the first floor slab 15 flush with concrete.

[0033] (5) In this embodiment, the slab body 16 of the first-floor floor slab 15 has a column peripheral portion 16c that is positioned lower than the floor body portion 16a. As a result, the slab body 16 is lowered only in the portion where the floor insulation material 42 is provided, so the amount of concrete used can be reduced by making the concrete thickness of the floor body portion 16a thinner.

[0034] This embodiment can be implemented with the following modifications. This embodiment and the following modifications can be combined with each other to the extent that they do not contradict each other technically. In the above embodiment, a seismic isolation device 18 made of laminated rubber bearings was used as the seismic isolation device 18 placed between the upper foundation 12 and the lower foundation 11 of the cold storage warehouse 10. The seismic isolation device installed in the cold storage warehouse 10 is not limited to laminated rubber bearings, as long as it can allow horizontal movement of the upper foundation 12; for example, a sliding bearing or the like may be used.

[0035] In the cold storage warehouse 10 of the above embodiment, the upper foundation 12 that abuts above the seismic isolation device 18 is integrally formed with the first-floor slab 15, and insulation material is placed on the underside of the upper foundation 12 and the first-floor slab 15. In a building that will become a cold storage warehouse with a seismic isolation device, the position where the insulation material is placed is as long as it covers at least the underside of the floor slab of the lowest floor, as long as it is on the outer circumference of the upper member that the seismic isolation device abuts. For example, if the cold storage warehouse has an underground portion that is integrated with the upper foundation, insulation material may be placed on the underside of the floor slab of this underground portion. Furthermore, it is preferable to cover the upper foundation 12 in order to prevent the cold air of the cold storage warehouse 10 from escaping from the underside of the lowest floor of the building, but it is not necessary to provide it around the entire circumference of the upper foundation 12, for example, insulation material may be provided only on a part of the upper foundation 12. Furthermore, insulation material may be provided on the bottom surface of the second installation portion 12a of the upper foundation 12, as long as it is not in contact with the seismic isolation device 18.

[0036] The cold storage warehouse 10 in the above embodiment is provided with insulation material 40 having a column side insulation material 41 that covers the outer circumference of the lower part of the column member 22 and a floor insulation material 42 that covers the first floor slab 15. However, the configuration of the insulation material 40 is not limited to this, as long as a configuration can be constructed in which cooling heat is not easily transmitted to the seismic isolation device 18 via the column member 22. For example, the column side insulation material 41 and the floor insulation material 42 may be provided separately, or the shape of the floor insulation material 42 may be formed as a disc shape instead of a rectangular shape in the plan. Furthermore, the retaining concrete member 45 may be configured with a plan shape at the same height as the upper surface of the floor body 16a without providing a peripheral edge 45a. Alternatively, the floor body 16a may be formed in contact with the column member 22 on the slab body 16 around the column member 22 without providing a column peripheral portion 16c, and after the warehouse is completed, the insulation material may be placed on the area in the slab body 16 where the insulation material 40 is placed.

[0037] In the above embodiment, insulation material is placed on the sides of the upper foundation 12 of the cold storage warehouse 10, and an underfloor heat-insulating member 17 is placed to cover the underside of the first-floor slab 15. After that, insulation material 40 having column side insulation material 41 and floor insulation material 42 is placed, and then a retaining concrete member 45 is formed. The timing of attaching the insulation material on the sides of the upper foundation 12 and the underfloor heat-insulating member 17 is not limited to this. For example, the insulation material on the sides of the upper foundation 12 and the underfloor heat-insulating member 17 may be attached after the retaining concrete member 45 has been formed. Furthermore, the insulation material on the sides of the upper foundation 12 and the underfloor heat-insulating member 17 may be attached while the insulation material 40 is being placed or while the retaining concrete member 45 is being formed. [Explanation of Symbols]

[0038] F1...Foundation, 10...Cold storage, 11...Lower foundation, 11a...First installation section, 12...Upper foundation, 12a...Second installation section, 12b,12c...Upper main beam, 15...First floor slab, 16...Slab body, 16a...Floor body section, 16b...Connection section, 16c...Column surrounding section, 17...Underfloor heat insulation member, 17a...First bottom section, 17b...Side section, 17c...Second bottom section, 18...Seismic isolation device, 21,22...Column members, 27,28...Floor slab, 29...Rooftop slab, 31,32a,33a...Side insulation material, 32b,33b...Bottom insulation material, 32,33,40...Insulation material, 41...Column side insulation material, 42...Floor insulation material, 45...Concrete retaining member, 45a...Peripheral section.

Claims

1. A low-temperature warehouse comprising a seismic isolation layer with seismic isolation devices installed between the lower and upper foundations of a building, and a floor slab of the lowest floor installed on the upper foundation, and having a storage space cooled to a low temperature, At least the underside of the floor slab of the lowest floor is covered with an underfloor heat-insulating member, A low-temperature warehouse characterized in that the sides of the upper foundation are covered with side insulation material, and the underside of the upper main beam of the upper foundation is covered with bottom insulation material.

2. A low-temperature warehouse comprising a seismic isolation layer having seismic isolation devices installed between the lower foundation and the upper foundation of a building, and a floor slab of the lowest floor installed on the upper foundation, and having a storage space cooled to a low temperature, At least the underside of the floor slab of the lowest floor is covered with an underfloor heat-insulating member, A column side insulation material that covers the outer circumference of the lower part of a column member erected on the upper foundation, The above-ground insulation material is connected to the above-ground insulation material on the side of the column and covers the floor slab of the lowest floor surrounding the column member, The floor slab comprises a floor main body portion that constitutes the floor surface, a column peripheral portion on which the floor insulation material is placed, and a stepped portion having a step that connects the floor main body portion and the column peripheral portion. A concrete retaining member is formed on top of the aforementioned floor insulation material. The low-temperature warehouse is characterized in that the retaining concrete member is formed with a thickness that is flush with the upper surface of the main floor portion.

3. A method for constructing a low-temperature warehouse comprising a seismic isolation layer having seismic isolation devices installed between the lower foundation and the upper foundation of a building, and a floor slab of the lowest floor installed on the upper foundation, and having a storage space cooled to a low temperature, After constructing the lower foundation, the seismic isolation device is installed on the lower foundation, and the upper foundation is constructed on top of the seismic isolation device. A method for constructing a low-temperature warehouse, characterized by covering the sides of the upper foundation with side insulation material, covering the underside of the upper main beam of the upper foundation with bottom insulation material, and covering the underside of the floor slab of the lowest floor, which is constructed to be integrated with the upper foundation, with an underfloor heat-insulating member.

4. A method for constructing a low-temperature warehouse comprising a seismic isolation layer with seismic isolation devices installed between the lower and upper foundations of a building, and a floor slab of the lowest floor installed on the upper foundation, and having a storage space cooled to a low temperature, After providing a column side insulation material that covers the outer circumference of the lower part of the column member erected on the upper foundation, and a floor insulation material that is connected to the column side insulation material and covers the floor slab of the lowest floor surrounding the column member, a concrete retaining member is formed on the floor insulation material. A method for constructing a low-temperature warehouse, characterized in that, after constructing the floor slab of the lowest floor, an underfloor heat-insulating member is provided to cover the underside of the floor slab of the lowest floor.

Images