Refrigerated warehouse structure and construction method of refrigerated warehouse

Abstract

To provide a refrigeration warehouse structure which can shorten a beam lower dimension, while securing heat insulation performance between a first room and a second room adjacent to each other and having difference in preset temperatures in the rooms.SOLUTION: A step part 4c is provided at a partition position between a slab 4a of a first room RA and a slab 4b of a second room RB positioned below a partition wall 2 for partitioning the first room RA and the second room RB, and in a recessed part of the slab 4b of the second room RB which is recessed with respect to the slab 4a of the first room RA, a lower end part of a wall heat insulation material 2a, a floor heat insulation material 9 and a presser material 10 are arranged. In a first composite beam 3a which is provided at the step part 4c, an upper surface of a first steel beam 7a is made to contact a lower surface of the slab 4a, and a stud 8 provided on the upper surface of the first steel beam 7a is buried in the slab 4a. In a second composite beam 3b which is provided in the second room RB, an upper part of a second steel beam 7b is buried in the slab 4b, and the stud 8 provided at the upper part of the second steel beam 7b is buried in the slab 4b.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a refrigerated warehouse structure, and more specifically, to a refrigerated warehouse structure that can shorten the under-beam dimension while ensuring insulation performance between adjacent first and second rooms that have a difference in the set temperature inside the rooms. [Background technology]

[0002] Conventionally, a floor structure with composite beams in which steel beams are integrated with a slab formed of reinforced concrete has been proposed (for example, see Patent Document 1). This floor structure with composite beams has the advantage that the amount of concrete poured at the construction site can be reduced by adopting steel beams compared to a structure in which the beams are formed of reinforced concrete. When this floor structure is used in a refrigerated warehouse, it is necessary to make it an insulating structure in order to ensure the insulating performance between the room temperature room and the refrigerated room, which have a difference in the indoor set temperature, and between the refrigerated rooms, which have a difference in the indoor set temperature.

[0003] When the floor structure proposed in Patent Document 1 is made into a heat-insulating structure, as illustrated in Fig. 6, the level La1 of the upper surface of the slab 4 of the first room RA and the level Lb1 of the upper surface of the slab 4 of the second room RB are the same height, and the level La2 of the lower surface of the slab 4 of the first room RA and the level Lb2 of the lower surface of the slab 4 of the second room RB are the same height. The composite beam 3 located below the partition wall 2 that separates the adjacent first room RA and second room RB has the upper surface of the steel beam 7 abutted against the lower surface (lower surface of the deck 5) of the slab 4 located below the partition wall 2, and the studs 8 protruding upward from the upper surface of the steel beam 7 are embedded in the slab 4. The wall insulation material 2a and the floor insulation material 9 constituting the partition wall 2 are arranged on the slab 4 of the second room RB, and the holding material 10 (for example, holding concrete) is arranged on the floor insulation material 9. As illustrated in Figure 7, the composite beam 3 installed in the second room RB similarly has the upper surface of a steel beam 7 abutting the underside of the slab 4 of the second room RB, and the studs 8 protruding upward from the upper surface of the steel beam 7 being embedded in the slab 4 of the second room RB.

[0004] In this way, if the floor structure proposed in Patent Document 1 is simply made into an insulated structure, as illustrated in Figs. 6 and 7, the level Lb5 of the floor surface of the second room RB will be higher than the level La1 of the upper surface of the slab 4 of the first room RA by the thickness of the floor insulation material 9 and the holding material 10 for ensuring the insulation performance. In addition, since the steel beam 7 is joined to the lower part of the slab 4, the longest beam dimension (height from the lower end of the beam to the floor surface) that is the standard when setting the floor height of the refrigerated warehouse will be the beam dimension of the composite beam 3 provided in the second room RB. And, the longest beam dimension is the sum of the beam depth of the steel beam 7, the thickness of the slab 4, the thickness of the floor insulation material 9, and the thickness of the holding material 10, so it is relatively long. In order to keep the construction cost of the refrigerated warehouse low, it is important to shorten the longest beam dimension and set the floor height of each floor as low as possible. Therefore, as a refrigerated warehouse structure, there is room for improvement in shortening the under-beam dimension while ensuring the insulation performance between adjacent first and second rooms that set a difference in the indoor temperature settings. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2021-123941 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a refrigerated warehouse structure that can shorten the under-beam dimension while ensuring insulation performance between adjacent first and second rooms that have a difference in the set temperature inside the rooms. [Means for solving the problem]

[0007] In order to achieve the above object, the refrigerated warehouse structure of the present invention has a partition wall separating adjacent first and second rooms, which allow different preset temperatures between the rooms, and a composite beam formed by integrating a steel beam with a slab formed of reinforced concrete, the slab having a step at a partition position between the slab of the first room and the slab of the second room, which are located below the partition wall, and the step is set such that an upper surface of the slab of the second room is lower than an upper surface of the slab of the first room, and a lower surface of the slab of the second room is lower than a lower surface of the slab of the first room, and the second room is provided with the partition wall in a recessed portion of the slab of the second room, which is recessed downward relative to the slab of the first room. The lower end of the wall insulation that constitutes the cut wall and floor insulation that insulates the slab of the second room are arranged, and a clamping material is arranged on top of the floor insulation. A first composite beam that is provided at the step portion and is integrated with the slab of the first room and a first steel beam is characterized in that the upper surface of the first steel beam abuts against the underside of the slab of the first room and studs protruding upward from the upper surface of the first steel beam are embedded in the slab of the first room. A second composite beam that is integrated with the slab of the second room and a second steel beam is characterized in that the upper part of the second steel beam is embedded in the slab of the second room and studs protruding from the upper part of the second steel beam are embedded in the slab of the second room. Effect of the Invention

[0008] According to the present invention, a step is provided at the partition position between the slab of the first room and the slab of the second room, which are located below the partition wall that separates the adjacent first room and second room, where the set temperatures of the rooms are different. In the second room, the lower end of the wall insulation material constituting the partition wall and the floor insulation material that insulates the slab of the second room are arranged in a recess of the slab of the second room, which is recessed downward from the slab of the first room. This makes it possible to prevent the floor surface of the second room from becoming higher than the floor surface of the first room while ensuring the insulation performance between the adjacent first and second rooms. In addition, the first composite beam, which is provided at the step and is integrated with the slab of the first room and the first steel beam, is in a state in which the upper surface of the first steel beam abuts against the lower surface of the slab of the first room, and the studs protruding upward from the upper surface of the first steel beam are embedded in the slab of the first room. Furthermore, the second composite beam, in which the slab of the second room and the second steel beam are integrated, is in a state in which the upper part of the second steel beam is embedded in the slab of the second room, and the studs protruding from the upper part of the second steel beam are embedded in the slab of the second room. By configuring the first composite beam and the second composite beam as described above, the beam bottom dimension from the floor surface (upper surface of the slab) of the first room to the lower surface of the first steel beam integrated with the slab of the first room and the beam bottom dimension from the floor surface (upper surface of the retainer) of the second room to the lower surface of the second steel beam integrated with the slab of the second room can be shortened. Therefore, it is possible to shorten the beam bottom dimension while ensuring the insulation performance between the adjacent first and second rooms, which sets a difference in the set temperature between the rooms. [Brief description of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram illustrating a schematic plan view of a part of the structure of a refrigerated warehouse equipped with a refrigerated warehouse structure according to an embodiment of the present invention. FIG. [Diagram 2] 2 is a cross-sectional view taken along the line AA in FIG. 1, and is an explanatory diagram illustrating a cross-sectional view of a first composite beam in which the slab of the first room and a first steel beam are integrated. [Diagram 3] 1, and is an explanatory diagram illustrating a cross-sectional view of a second composite beam in which the slab of the second room and a second steel beam are integrated. FIG. [Figure 4]13 is an explanatory diagram illustrating, in cross section, a first composite beam in which the slab of the first room and a first steel beam are integrated in a refrigerated warehouse structure of another embodiment of the present invention. FIG. [Diagram 5] 13 is an explanatory diagram illustrating, in cross section, a second composite beam in which the slab of the second room and a second steel beam are integrated in a refrigerated warehouse structure of another embodiment of the present invention. FIG. [Figure 6] FIG. 1 is an explanatory diagram illustrating a cross-sectional view of a conventional composite beam in which the slab of the first room and a steel beam are integrated. [Figure 7] FIG. 1 is an explanatory diagram illustrating a cross-sectional view of a conventional composite beam in which the slab of the second room and a steel beam are integrated. [Figure 8] 1 is an explanatory diagram illustrating a cross-sectional view of a reference form of composite beam in which the slab of the first room and a steel beam are integrated. FIG. [Figure 9] 13 is an explanatory diagram illustrating a cross-sectional view of a reference form of composite beam in which the slab of the second room and a steel beam are integrated. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The refrigerated warehouse structure of the present invention will be described below based on the embodiment shown in the drawings. Note that the drawings are partially exaggerated in order to clearly show the configuration of the refrigerated warehouse structure, and some parts do not correspond to the actual dimensional ratio.

[0011] As illustrated in Fig. 1 and Fig. 2, the refrigerated warehouse structure 1 of the present invention has a partition wall 2 that separates adjacent first and second rooms RA and RB, which have different set temperatures, and a composite beam 3 in which a steel beam 7 is integrated with a slab 4 made of reinforced concrete. Fig. 1 illustrates a plan view of a part of the framework of a refrigerated warehouse equipped with the refrigerated warehouse structure 1. The framework of the refrigerated warehouse is composed of a plurality of columns 12 erected at intervals from each other and steel beams 7 erected between the columns 12. The structure of the columns 12 is not particularly limited, and may be a steel structure, a reinforced concrete structure, or a steel-framed reinforced concrete structure.

[0012] The range indicated by the hatched area in FIG. 1 is the first room RA, and the other range is the second room RB. A refrigerated warehouse is a warehouse intended to store refrigerated foods, livestock products, marine products, etc. at low temperatures. The first room RA and the second room RB are rooms that are provided in the refrigerated warehouse and have different set temperatures. The difference in set temperatures provided between the first room RA and the second room RB is, for example, 10°C or more, 15°C or more when the temperature difference is larger, and 20°C or more when the temperature difference is even larger. Specifically, examples include a case where either the first room RA or the second room RB is a room temperature room and the other of the first room RA or the second room RB is a refrigerated room, or a case where either the first room RA or the second room RB is a refrigerated room with a relatively high set temperature (for example, a set temperature of about -25°C), and the other of the first room RA or the second room RB is a refrigerated room with a relatively low set temperature (for example, a set temperature of about -40°C). The temperature setting for the refrigerated room is, for example, -60°C to -5°C. The room temperature room is used as a room for sorting goods, an office, a management room, etc., and the temperature setting for the room is, for example, about 10°C to 25°C.

[0013] FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1. As illustrated in FIG. 2, the adjacent first room RA and second room RB are partitioned by a partition wall 2 having a wall insulation material 2a. In the figure, the specific structure of the partition wall 2 is omitted. The structure of the partition wall 2 is not particularly limited as long as it has the wall insulation material 2a on the second room RB side, and can be variously configured. For example, it can be configured such that a wall panel constituting the partition wall 2 is arranged on the second room RB side of the wall insulation material 2a. Examples of the wall insulation material 2a include a fiber-based insulation material and a foamed plastic insulation material. The material and thickness of the wall insulation material 2a can be appropriately determined depending on the structure of the partition wall 2 and the insulation performance required for the partition wall 2.

[0014] 2, in the present invention, the steel beam 7 that is erected along the partition wall 2 that separates the first room RA and the second room RB and is integrated with the slab 4 (4a) of the first room RA is referred to as the first steel beam 7a. And, the composite beam 3 that is provided at the partition position between the first room RA and the second room RB and that is integrated with the slab 4a of the first room RA and the first steel beam 7a is referred to as the first composite beam 3a.

[0015] Fig. 3 is a cross-sectional view taken along the line B-B in Fig. 1. As illustrated in Fig. 3, in the present invention, the steel beam 7 arranged in the second room RB, extending in a direction perpendicular to the first steel beam 7a, and integrated with the slab 4 (4b) of the second room RB is referred to as the second steel beam 7b. And the composite beam 3 integrated with the slab 4b of the second room RB and the second steel beam 7b is referred to as the second composite beam 3b.

[0016] As illustrated in Fig. 2, the slab 4 in the refrigerated warehouse structure 1 of the present invention is made of reinforced concrete composed of reinforcing bars 6 and concrete, and has a step 4c at the partition position between the slab 4a of the first room RA and the slab 4b of the second room RB, which are located below the partition wall 2. In this step 4c, the level Lb1 of the upper surface of the slab 4b of the second room RB is lower than the level La1 of the upper surface of the slab 4a of the first room RA, and the level Lb2 of the lower surface of the slab 4b of the second room RB is lower than the level La2 of the lower surface of the slab 4a of the first room RA. In the present invention, the range of this slab 4 located below the partition wall 2 is defined as the step 4c.

[0017] In this embodiment, the slab 4a of the first room RA and the slab 4b of the second room RB are each configured to have a flat deck 5 and reinforced concrete. The deck 5 constituting the slabs 4a and 4b may be a flat deck or a deck plate. The shape of the deck 5 constituting the slabs 4a and 4b is not limited to a flat plate shape, and for example, a corrugated deck 5 may be used. Note that the deck 5 is not an essential component, and for example, the slab 4 may not have the deck 5. In the following, the deck 5 constituting the slab 4a of the first room RA is referred to as the first deck 5a, and the deck 5 constituting the slab 4b of the second room RB is referred to as the second deck 5b.

[0018] The thickness dimension of the slab 4a of the first room RA and the thickness dimension of the slab 4b of the second room RB can be appropriately determined according to the strength required for each of the slabs 4a and 4b. The thickness dimensions of the slabs 4a and 4b are, for example, about 100 mm to 300 mm. It is preferable that the slab 4a of the first room RA and the slab 4b of the second room RB are set to the same thickness dimension. In this embodiment, the thickness dimension of the slab 4a of the first room RA and the thickness dimension of the slab 4b of the second room RB are set to the same thickness dimension of 180 mm. It is also possible to set the thickness dimensions of the slab 4a of the first room RA and the slab 4b of the second room RB to different thickness dimensions. The number of reinforcing bars 6 constituting the slab 4 (4a, 4b) and the reinforcing bar structure are not limited to the embodiment exemplified in FIG. 2, and various other configurations are possible.

[0019] In the second room RB, the lower end of the wall insulation material 2a constituting the partition wall 2 and the floor insulation material 9 for insulating the slab 4b of the second room RB are arranged in a recessed portion of the slab 4b of the second room RB, which is recessed downward from the slab 4a of the first room RA. In this embodiment, the lower end of the wall insulation material 2a is arranged on the floor insulation material 9. A pressing material 10 is arranged on the floor insulation material 9. Examples of the floor insulation material 9 include a fiber-based insulation material and a foamed plastic insulation material. The pressing material 10 is made of, for example, pressing concrete. The pressing material 10 can be configured with or without reinforcing bars. The material and thickness of the floor insulation material 9 and the pressing material 10 can be appropriately determined according to the required insulation performance. The thickness of the floor insulation material 9 is, for example, about 50 mm to 200 mm. The thickness of the pressing material 10 is, for example, about 50 mm to 200 mm. In this embodiment, the thickness dimension of the floor insulating material 9 is set to 100 mm, and the thickness dimension of the pressing material 10 is set to 100 mm.

[0020] As shown in FIG. 2, the first steel beam 7a is disposed below the center in the thickness direction of the partition wall 2 that separates the first room RA and the second room RB. In this embodiment, the first steel beam 7a is made of H-shaped steel. The first steel beam 7a can also be made of other steel materials such as square steel or channel steel. The size of the first steel beam 7a can be appropriately determined depending on the required strength. The beam depth of the first steel beam 7a is, for example, about 500 mm to 1200 mm. In this embodiment, the beam depth of the first steel beam 7a is set to 800 mm.

[0021] The first composite beam 3a, which is provided on the step portion 4c of the slab 4 and is formed by integrating the slab 4a of the first room RA with the first steel beam 7a, has the upper surface of the first steel beam 7a in contact with the lower surface of the slab 4a of the first room RA (the lower surface of the first deck 5a). The studs 8 protruding upward from the upper surface of the first steel beam 7a are embedded in the slab 4a of the first room RA. The upper surface of the first steel beam 7a and the lower end of the stud 8 are joined.

[0022] The longitudinal length of the stud 8 embedded in the slab 4a of the first room RA is set shorter than the thickness dimension of the slab 4a of the first room RA. The longitudinal length of the stud 8 provided in the first steel beam 7a is, for example, about 50 mm to 200 mm. In this embodiment, the stud 8 is provided in one position in the center of the width direction of the first steel beam 7a, but the stud 8 can also be provided in multiple positions in the width direction of the first steel beam 7a. Multiple studs 8 are arranged on the first steel beam 7a at intervals in the longitudinal direction (depth direction in FIG. 2), and each stud 8 is embedded in the slab 4a of the first room RA.

[0023] In this embodiment, the first deck 5a constituting the slab 4a of the first room RA extends up to just before the studs 8 provided on the upper surface of the first steel beam 7a (the upper surface of the upper flange of the H-shaped steel). It is preferable that the end of the first deck 5a overlaps the upper surface of the first steel beam 7a by, for example, about 20 mm to 50 mm.

[0024] For example, the first deck 5a may be extended to the second room RB side beyond the position where the stud 8 is provided on the upper surface of the first steel beam 7a. In this case, before the stud 8 is joined to the upper surface of the first steel beam 7a, the first deck 5a is extended to the second room RB side beyond the position where the stud 8 is provided on the upper surface of the first steel beam 7a. After that, the first deck 5a is melted with a welding rod at the position where the stud 8 is to penetrate the first deck 5a to form a through hole, and the stud 8 is inserted into the through hole and the lower end of the stud 8 is joined to the upper surface of the first steel beam 7a by welding. After that, the gap between the through hole formed in the first deck 5a and the stud 8 is sealed by welding.

[0025] A deck support 13 is joined to the side surface of the first steel beam 7a midway in the height direction, and an end portion of the second deck 5b constituting the slab 4b of the second room RB is placed on the deck support 13. In this embodiment, the deck support 13 is joined to the side surface of the web of the H-shaped steel constituting the first steel beam 7a on the second room RB side. In this embodiment, the second deck 5b extends to the side surface of the first steel beam 7a (the side surface of the web of the H-shaped steel). Note that it is sufficient that the end portion of the second deck 5b is placed on the deck support 13, and the second deck 5b does not have to extend to the side surface of the first steel beam 7a.

[0026] The slab 4a of the first room RA and the slab 4b of the second room RB are integrated by reinforced concrete. The reinforced concrete of the step 4c, which is the joint between the slab 4a of the first room RA and the slab 4b of the second room RB, is provided with Z-shaped reinforcing bars 6 extending from the slab 4a of the first room RA to the slab 4b of the second room RB. The upper flange of the H-shaped steel constituting the first steel beam 7a on the second room RB side is embedded in the reinforced concrete. The slab 4a of the first room RA, the slab 4b of the second room RB, and the step 4c are also provided with reinforcing bars 6 extending in the longitudinal direction of the first steel beam 7a (depth direction in FIG. 2), but these reinforcing bars 6 are omitted in FIG. 2.

[0027] The height difference between the level La1 of the upper surface of the slab 4a of the first room RA and the level Lb1 of the upper surface of the slab 4b of the second room RB can be set appropriately according to the thickness dimension of the floor insulation material 9 and the thickness dimension of the pressing material 10 to be provided in the second room RB, but is set within the range of 100 mm to 400 mm, for example. It is preferable that the height difference between the level La1 of the upper surface of the slab 4a of the first room RA and the level Lb1 of the upper surface of the slab 4b of the second room RB is the same dimension as the total thickness of the floor insulation material 9 and the pressing material 10 provided in the second room RB. In this embodiment, the height difference between the level La of the upper surface of the slab 4a of the first room RA and the level Lb1 of the upper surface of the slab 4b of the second room RB is set to 200 mm, which is the same as the total thickness of the floor insulation material 9 (100 mm) and the pressing material 10 (100 mm). In other words, by placing insulation material 9 and clamping material 10 in the recessed portion of the slab 4b of the second room RB, which is recessed relative to the slab 4a of the first room RA, the level La1 of the top surface of the slab 4a of the first room RA and the level Lb5 of the floor surface (top surface of the clamping material 10) of the second room RB are set to the same height.

[0028] The height difference between the level La2 of the lower surface of the slab 4a of the first room RA and the level Lb2 of the lower surface of the slab 4b of the second room RB can be set appropriately, but is set within a range of, for example, 100 mm to 400 mm. The height difference H1 between the level La2 of the lower surface of the slab 4a of the first room RA and the level Lb2 of the lower surface of the slab 4b of the second room RB should be set to the same dimension as the height difference between the level La1 of the upper surface of the slab 4a of the first room RA and the level Lb1 of the upper surface of the slab 4b of the second room RB. In this embodiment, the height difference H1 between the level La2 of the lower surface of the slab 4a of the first room RA and the level Lb2 of the lower surface of the slab 4b of the second room RB is set to 200 mm, the same as the height difference between the level La1 of the upper surface of the slab 4a of the first room RA and the level Lb1 of the upper surface of the slab 4b of the second room RB.

[0029] As illustrated in FIG. 3, the second composite beam 3b, in which the slab 4b of the second room RB and the second steel beam 7b are integrated, has the upper part of the second steel beam 7b embedded in the slab 4b of the second room RB, and the studs 8 protruding from the upper part of the second steel beam 7b are embedded in the slab 4b of the second room RB. The upper part of the second steel beam 7b specifically indicates a part above the center in the height direction of the second steel beam 7b. In this embodiment, the upper end of the second steel beam 7b protrudes above the upper surface of the slab 4b of the second room RB, and the protruding upper end of the second steel beam 7b is embedded in the floor insulation material 9. A groove portion into which the upper end of the second steel beam 7b fits is provided in the lower part of the floor insulation material 9.

[0030] In this embodiment, the upper end of the second steel beam 7b is arranged to protrude above the upper surface of the slab 4b of the second room RB by the difference (20 mm) between the thickness (180 mm) of the slab 4a of the first room RA and the total thickness (200 mm) of the floor insulation material 9 and the pressing member 10. The level Lb3 of the upper surface of the second steel beam 7b is set at a position higher than the level Lb1 of the upper surface of the slab 4b of the second room RB by the difference between the thickness of the slab 4a of the first room RA and the total thickness of the floor insulation material 9 and the pressing member 10, so that the level La3 of the upper surface of the first steel beam 7a and the level Lb3 of the upper surface of the second steel beam 7b are set at the same height. In other words, the second steel beam 7b is positioned so that the height difference H1 between the level La3 of the upper surface of the first steel beam 7a and the level Lb2 of the lower surface of the slab 4b of the second room RB and the height difference H2 between the level Lb3 of the upper surface of the second steel beam 7b and the level Lb2 of the lower surface of the slab 4b of the second room RB are of the same dimension.

[0031] In this embodiment, the second steel beam 7b is made of H-shaped steel, but the second steel beam 7b can also be made of other steel materials such as square steel or channel steel. The size of the second steel beam 7b can be appropriately determined according to the required strength. The beam depth of the second steel beam 7b is, for example, about 500 mm to 1200 mm. In this embodiment, the beam depth of the second steel beam 7b is set to 800 mm, and the first steel beam 7a and the second steel beam 7b are set to the same beam depth. That is, in this embodiment, the level La3 of the upper surface of the first steel beam 7a and the level Lb3 of the upper surface of the second steel beam 7b are set to the same height, and the level La4 of the lower surface of the first steel beam 7a and the level Lb4 of the lower surface of the second steel beam 7b are also set to the same height.

[0032] A deck receiver 13 is joined to the side surface of the second steel beam 7b midway in the height direction, and the second deck 5b constituting the slab 4b of the second room RB is placed on the deck receiver 13. In this embodiment, the deck receivers 13 are joined to the side surfaces on both sides of the web of the H-shaped steel constituting the second steel beam 7b. Then, the slab 4b (second deck 5b) of the second room RB integrated with the slab 4a of the first room RA is placed on the deck receiver 13 on the first room RA side, and another slab 4b of the second room RB is placed on the deck receiver 13 on the opposite side.

[0033] In this embodiment, the studs 8 protruding laterally from the side surfaces of the upper parts of the second steel beams 7b are embedded in the slabs 4b of the second room RB. More specifically, the studs 8 extending laterally are joined to the side surfaces of the upper parts of the webs of the H-shaped steel constituting the second steel beams 7b. For example, the studs 8 extending downwards may be joined to the lower surfaces of the upper flanges of the H-shaped steel constituting the second steel beams 7b. The longitudinal length of the studs 8 provided on the second steel beams 7b is, for example, about 50 mm to 200 mm. In this embodiment, one stud 8 is provided on each side of the second steel beams 7b, but the studs 8 may also be provided at multiple locations on both sides of the second steel beams 7b. A plurality of studs 8 are arranged at intervals in the longitudinal direction of the second steel beams 7b (depth direction in FIG. 3). The studs 8 protruding from the top of the second steel beam 7b are embedded in the slabs 4b of each second room RB, so that the second steel beam 7b and the slabs 4b of each second room RB, which are arranged on both sides of the second steel beam 7b, are integrated with each other.

[0034] In this embodiment, the reinforcing bars 6 constituting the slab 4b of the second room RB, which extend in a direction intersecting the extension direction of the H-shaped steel constituting the second steel beam 7b, extend beyond the side end of the flange of the H-shaped steel constituting the second steel beam 7b to the web side, and the tip of the reinforcing bar 6 facing the web is folded back in a hook shape. In this embodiment, the tip of the reinforcing bar 6 is folded back in a hook shape downward, but the tip of the reinforcing bar 6 can also be folded back in another direction. Note that the slab 4b of the second room RB also has reinforcing bars 6 extending in the longitudinal direction of the second steel beam 7b (depth direction in FIG. 3), but these reinforcing bars 6 are omitted in FIG. 3.

[0035] As illustrated in FIG. 2 and FIG. 3, the underside of the slab 4b of the second room RB, the lower part of the second steel beam 7b, the underside of the slab 4a of the first room RA, and the first steel beam 7a are covered with the heat insulating material 11. In this embodiment, the heat insulating material 11 is formed by spraying a heat insulating material onto each of the above-mentioned parts. Examples of the heat insulating material 11 include a fiber-based heat insulating material and a foamed plastic heat insulating material. The material and thickness of the heat insulating material 11 can be appropriately determined according to the required heat insulating performance. The heat insulating material 11 is not limited to sprayed heat insulating material, and for example, the heat insulating material 11 can be attached to each of the above-mentioned parts. Also, for example, the heat insulating material 11 can be attached to each member in advance in a factory or the like.

[0036] An example of a procedure for constructing the above-mentioned refrigerated warehouse structure 1 will be described below.

[0037] As illustrated in FIG. 2 and FIG. 3, a first steel beam 7a and a second steel beam 7b are erected on the columns 12 that constitute the refrigerated warehouse. In this embodiment, the first steel beam 7a and the second steel beam 7b, which have the same beam depth, are disposed at the same height. Deck supports 13 are joined to the first steel beam 7a and the second steel beam 7, respectively. Studs 8 are joined to the first steel beam 7a and the second steel beam 7b, respectively. A first deck 5a that constitutes the slab 4a of the first room RA is laid on the upper surface of the first steel beam 7a. A second deck 5b that constitutes the slab 4b of the second room RB is laid on the deck supports 13 provided on the first steel beam 7a and the deck supports 13 provided on the second steel beam 7b. Then, a formwork that forms the step portion 4c is installed.

[0038] The deck supports 13 can be installed after the steel beams 7a, 7b are joined to the columns 12, or can be attached in advance before the steel beams 7a, 7b are joined to the columns 12. The studs 8 can be joined to the steel beams 7a, 7b after the steel beams 7a, 7b are joined to the columns 12, or can be joined to the steel beams 7a, 7b after the respective decks 5a, 5b are installed. The studs 8 can also be attached in advance to the steel beams 7a, 7b before the steel beams 7a, 7b are joined to the columns 12.

[0039] Next, reinforcing bars 6 that form the slab 4a of the first room RA are arranged on the first deck 5a, and reinforcing bars 6 that form the slab 4b of the second room RB are arranged on the second deck 5b. Reinforcing bars 6 that form the step portion 4c that is the joint between the slab 4a of the first room RA and the slab 4b of the second room RB are also arranged. The tip of the reinforcing bar 6 that faces the side of the second steel beam 7b (the side of the web of the H-shaped steel) is folded back into a hook shape. The tip of the reinforcing bar 6 can be formed into a hook shape in advance at a factory or the like, or the tip of the reinforcing bar 6 can be bent into a hook shape at the construction site.

[0040] Next, concrete is poured to form the slab 4a of the first room RA and the slab 4b of the second room RB. After the concrete forming the slab 4a of the first room RA and the slab 4b of the second room RB has hardened, the formwork is removed. Next, the partition wall 2 that separates the first room RA and the second room RB is erected. At this time, the lower end of the wall insulation material 2a constituting the partition wall 2 and the floor insulation material 9 that insulates the slab 4b of the second room RB are placed in the recessed portion of the slab 4b of the second room RB that is recessed downward relative to the slab 4a of the first room RA. Then, a pressing material 10 is placed on the floor insulation material 9. In this embodiment, pressing concrete is poured as the pressing material 10 on the floor insulation material 9 and hardened.

[0041] The underside of the slab 4b of the second room RB, the lower part of the second steel beam 7b, the underside of the slab 4a of the first room RA, and the first steel beam 7a are each covered with the heat insulating material 11. In this embodiment, the heat insulating material 11 is formed by spraying the heat insulating material onto each of the aforementioned portions. The work of forming the heat insulating material 11 can be carried out at any time after the first deck 5a and the second deck 5b have been laid. The above work completes the construction for one floor. The above construction is repeated for each floor to build a refrigerated warehouse.

[0042] As described above, according to the present invention, a step 4c is provided at the partition position between the slab 4a of the first room RA and the slab 4b of the second room RB, which are located below the partition wall 2 that separates the adjacent first room RA and second room RB, where a difference in the room temperature is set. In the second room RB, the lower end of the wall insulation material 2a constituting the partition wall 2 and the floor insulation material 9 that insulates the slab 4b of the second room RB are disposed in a recessed portion of the slab 4b of the second room RB that is recessed downward relative to the slab 4a of the first room RA. This ensures the insulation performance between the adjacent first room RA and second room RB, while preventing the floor surface of the second room RB from becoming higher than the floor surface of the first room RA.

[0043] In addition, the first composite beam 3a, which is provided in the step portion 4c and is formed by integrating the slab 4a of the first room RA with the first steel beam 7a, is configured such that the upper surface of the first steel beam 7a abuts against the lower surface of the slab 4b of the first room RA, and the studs 8 protruding upward from the upper surface of the first steel beam 7a are embedded in the slab 4a of the first room RA. Furthermore, the second composite beam 3b, which is formed by integrating the slab 4b of the second room RB with the second steel beam 7b, is configured such that the upper portion of the second steel beam 7b is embedded in the slab 4b of the second room RB, and the studs 8 protruding from the upper portion of the second steel beam 7b are embedded in the slab 4b of the second room RB.

[0044] By configuring the first composite beam 3a and the second composite beam 3b as described above, the beam bottom dimension from the floor surface (upper surface of the slab 4a) of the first room RA to the lower surface of the first steel beam 7a integrated with the slab 4a of the first room RA and the beam bottom dimension from the floor surface (upper surface of the retaining member 10) of the second room RB to the lower surface of the second steel beam 7b integrated with the slab 4b of the second room RB can be shortened. Therefore, it is possible to shorten the beam bottom dimension while ensuring the insulation performance between the adjacent first room RA and second room RB, which set a difference in the set temperature inside the room. By shortening the beam bottom dimension, it is possible to set the floor height lower, and the construction cost of the refrigerated warehouse can be reduced.

[0045] To explain in more detail, for example, even if a step 4c is provided at the partition position between the slab 4a of the first room RA and the slab 4b of the second room RB as in the reference embodiment different from the present invention illustrated in Figures 8 and 9, if the second steel beam 7b to be integrated with the slab 4b of the second room RB is arranged so that the upper surface of the second steel beam 7b abuts the lower surface of the slab 4b of the second room RB as in the conventional case, the beam bottom dimension of the second composite beam 3b provided in the second room RB is the sum of the beam depth of the second steel beam 7b, the thickness of the slab 4b of the second room RB, the thickness of the floor insulation material 9, and the thickness of the bracing material 10. Therefore, if the step 4c is only provided in the slab 4, the beam bottom dimension of the second composite beam 3b provided in the second room RB becomes relatively long, and it is not possible to shorten the longest beam bottom dimension that is the standard when setting the floor height of the refrigerated warehouse. In contrast, in the present invention, a step portion 4c is provided in the slab 4 and the upper part of the second steel beam 7b is buried in the slab 4b of the second room RB, making it possible to shorten the beam-under-beam dimension of the second composite beam 3b provided in the second room RB.

[0046] 8 and 9, if the second steel beam 7b is arranged so that the upper surface of the second steel beam 7b abuts against the lower surface of the slab 4b of the second room RB as in the conventional case, when the level Lb4 of the lower surface of the second steel beam 7b and the level La4 of the lower surface of the first steel beam 7a are matched, a member for adding the beam depth such as a CT steel 20 must be attached to the first steel beam 7a, or the size of the first steel beam 7a itself must be made larger than that of the second steel beam 7b. In contrast, in the present invention, the step portion 4c is provided in the slab 4, and the upper portion of the second steel beam 7b is embedded in the slab 4b of the second room RB, so that it is not necessary to attach a member for adding the beam depth such as a CT steel 20 to the first steel beam 7a or to make the size of the first steel beam 7a larger than that of the second steel beam 7b. Therefore, the refrigerated warehouse structure 1 of the present invention has the advantage that the fitting within the column-beam joints and the fitting between the steel beams 7a, 7b are relatively simple.

[0047] In the embodiment illustrated in Fig. 1 to Fig. 3, the second steel beam 7b is an H-shaped steel, and the reinforcing bars 6 constituting the slab 4b of the second room RB, which extend in a direction intersecting the extension direction of the H-shaped steel, extend beyond the side end of the flange of the H-shaped steel to the web side, and the tip of the reinforcing bar 6 facing the web is folded back in a hook shape. With this configuration, it is possible to easily connect the second steel beam 7b and the reinforcing bar 6 facing the side surface of the second steel beam 7b. By folding back the tip of the reinforcing bar 6 in a hook shape, it is also advantageous to improve the unity between the reinforcing bar 6 constituting the slab 4b of the second room RB and the concrete.

[0048] If the underside of the slab 4b of the second room RB, the lower part of the second steel beam 7b, the underside of the slab 4a of the first room RA, and the first steel beam 7a are configured to be covered with the insulating material 11, it is advantageous to improve the thermal insulation of each of the first room RA and the second room RB. Increasing the thermal insulation of each of the first room RA and the second room RB is also advantageous to improve the energy saving performance of the refrigerated warehouse. In addition, if each of the above-mentioned parts is left exposed without being covered with the insulating material 11, there is a risk of condensation occurring on the underside of the slab 4 and the steel beam 7 due to the difference in indoor temperature between the first room RA and the second room RB, but by covering each of the above-mentioned parts with the insulating material 11, the risk of condensation occurring can be significantly reduced.

[0049] As in the embodiment illustrated in Fig. 1 to Fig. 3, when the second composite beam 3b provided in the second room RB is configured such that the upper end of the second steel beam 7b protrudes above the upper surface of the slab 4b of the second room RB and the upper end of the second steel beam 7b is embedded in the floor insulation material 9, it is more advantageous to shorten the beam-under dimension of the second composite beam 3b. In the present invention, it is sufficient that at least the upper part of the second steel beam 7b is embedded in the slab 4b of the second room RB, and for example, the upper end of the second steel beam 7b can be disposed at the same height as the upper surface of the slab 4b of the second room RB. For example, the upper end of the second steel beam 7b can be disposed at the midpoint of the slab 4b of the second room RB.

[0050] 4 and 5 illustrate another embodiment of the refrigerated storehouse structure 1 of the present invention.

[0051] As shown in Fig. 4 and Fig. 5, in this embodiment, the first steel beam 7a and the second steel beam 7b are made of square steel. The first deck 5a and the second deck 5b are made of corrugated decks. The wall panel 2b constituting the partition wall 2 is disposed on the second room RB side of the wall insulation material 2a. The other configurations are the same as those of the embodiment shown in Figs. 1 to 3.

[0052] In this embodiment, as shown in Fig. 4, studs 8 are joined to the top surface of the square steel that constitutes the first steel beam 7a, and deck receivers 13 are joined to the side surface of the square steel. Also, as shown in Fig. 5, studs 8 are joined to the side surface of the square steel that constitutes the second steel beam 7b, and deck receivers 13 are joined to the side surface of the square steel.

[0053] Even when the first steel beam 7a and the second steel beam 7b are made of steel materials other than H-shaped steel, such as square steel, as in this embodiment, or when the first deck 5a and the second deck 5b are made of corrugated decks, the same effects as those of the refrigerated warehouse structure 1 of the embodiment exemplified in Figures 1 to 3 can be achieved. When the first deck 5a and the second deck 5b are made of corrugated decks as in this embodiment, the reinforcement for the slab 4a of the first room RA and the slab 4b of the second room RB can be reduced compared to when the first deck 5a and the second deck 5b are made of flat decks, which is advantageous in reducing the number of work steps.

[0054] In the present invention, for example, a deck with a reinforcing bar truss can be used as the first deck 5a or the second deck 5b. In this case, the reinforcing bars 6 arranged in a truss shape and pre-installed on the first deck 5a with the reinforcing bar truss are used as the reinforcing bars 6 that constitute the slab 4a of the first room RA. Similarly, the reinforcing bars 6 arranged in a truss shape and pre-installed on the second deck 5b with the reinforcing bar truss are used as the reinforcing bars 6 that constitute the slab 4b of the second room RB. If the first deck 5a or the second deck 5b is constructed with a deck with a reinforcing bar truss, it is advantageous to reduce the time required for the reinforcing bar 6 arrangement work at the construction site, and is advantageous to reduce the construction time and the labor of workers. [Explanation of symbols]

[0055] 1. Refrigerated warehouse structure 2 Partition Wall 2a Wall insulation 2b Wall Panel 3 Composite beam 3a First composite beam 3b Second composite beam 4. Slab 4a First room slab 4b Second room slab 4c Step 5 Deck 5a First Deck 5b Second Deck 6. Steel Bars 7 Steel Beam 7a First steel beam 7b Second steel beam 8 Studs 9. Floor insulation 10 Clamp 11. Insulation 12 Pillars 13 Deck support 20 CT section steel RA First Room RB Second Room La1 Level of the top surface of the slab in the first room La2 Level of the bottom of the slab in the first room La3 Level of the top surface of the first steel beam integrated into the slab of the first room La4 Level of the bottom surface of the first steel beam integrated into the slab of the first room Lb1 Level of the top surface of the slab in the second room Lb2 Level of the bottom of the slab in the second room Lb3 Level of the top surface of the second steel beam integrated into the slab of the second room Lb4 Level of the bottom surface of the second steel beam integrated into the slab of the second room Lb5 Second room floor level

Claims

1. A refrigerated warehouse structure having a partition wall separating adjacent first and second rooms, which allow different indoor temperature settings, and a composite beam in which a steel beam is integrated into a slab formed of reinforced concrete, The slab has a step portion at a partition position between the slab of the first room located below the partition wall and the slab of the second room, and the step portion is set so that the upper surface of the slab of the second room is lower than the upper surface of the slab of the first room, and the lower surface of the slab of the second room is lower than the lower surface of the slab of the first room, A refrigerated warehouse structure characterized in that the second room has a lower end of wall insulation that constitutes the partition wall and floor insulation that insulates the slab of the second room arranged in a recess in the slab of the second room, which is recessed downward relative to the slab of the first room.

2. A first composite beam, which is provided at the step portion and is formed by integrating the slab of the first room with a first steel beam, has an upper surface of the first steel beam abutting against a lower surface of the slab of the first room, 2. The refrigerated warehouse structure according to claim 1, wherein the second composite beam, in which the slab of the second room and the second steel beam are integrated, has an upper part of the second steel beam embedded in the slab of the second room.

3. A stud protruding upward from the top surface of the first steel beam is embedded in the slab of the first room, The refrigerated warehouse structure according to claim 2, wherein the studs protruding from the top of the second steel beams are embedded in the slab of the second room.

4. A refrigerated warehouse structure as described in Claim 3, wherein the studs protruding from the side of the second steel beam are buried from the end face of the slab of the second room.

5. The second steel beam is an H-shaped steel, The reinforcing bars constituting the slab of the second room extending in a direction intersecting the extension direction of the H-shaped steel extend beyond the side end of the flange of the H-shaped steel to the web side, 3. A refrigerated warehouse structure according to claim 1, wherein the ends of the reinforcing bars facing the web are folded back in a hook shape.

6. The second steel beam is a square steel beam, The reinforcing bars constituting the slab of the second room extending in a direction intersecting the extending direction of the square steel extend beyond the tips of the studs protruding from the upper and side surfaces of the square steel to the side surfaces, 3. A refrigerated warehouse structure according to claim 1, wherein the tip of the reinforcing bar facing the side surface is folded back in a hook shape.

7. The refrigerated warehouse structure according to any one of claims 1 to 4, wherein the underside of the slab of the second room, the lower part of the second steel beam, the underside of the slab of the first room, and the first steel beam are covered with heat insulating material.

8. A refrigerated warehouse structure as described in claims 1 to 4, in which a support material is placed on top of the floor insulation material.

9. 3. The refrigerated warehouse structure according to claim 2, wherein the upper end of the second steel beam of the second composite beam protrudes above the upper surface of the slab of the second room, and the upper end of the second steel beam is embedded in the floor insulation material.

10. A method for constructing a refrigerated warehouse having adjacent first and second rooms with a difference in the set temperature of the rooms, comprising: a step of erecting a first steel beam and a second steel beam to columns constituting the refrigerated warehouse; a step of installing a formwork for forming a step portion at a partition position between the slab of the first room and the slab of the second room, the partition position being located below a partition wall that separates the first room and the second room; a step of arranging reinforcing bars constituting the slab of the first room, reinforcing bars constituting the slab of the second room, and reinforcing bars constituting the step portion; pouring concrete to form the slab of the first room and the slab of the second room; erecting the partition wall; A method for constructing a refrigerated warehouse, comprising a step of placing the lower end of wall insulation and floor insulation in a recess in the slab of the second room, which is recessed downward relative to the slab of the first room.

11. A step of joining studs to the first steel beam to form a first composite beam in which the first steel beam and the slab of the first room are integrated; The method for constructing a refrigerated warehouse according to claim 10, further comprising a step of joining studs to the second steel beams to form a second composite beam that integrates the second steel beams with the slab of the second room.

12. A method for constructing a refrigerated warehouse as described in claim 10 or 11, comprising a step of covering the underside of the slab of the second room, the lower part of the second steel beam, the underside of the slab of the first room, and the first steel beam with insulating material.

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