Floating floor structure for buildings, construction method thereof, and intermediate member for floating floor structure

Abstract

To improve efficiency of construction work of a floating floor structure for securing a water circulation space between a skeleton and a floor slab by obtaining a sufficient vibration control effect of the floating floor structure.SOLUTION: A floating floor structure of the present invention includes a plurality of elastic bodies 10 placed on a bottom surface 1a of a building's core 1, an intermediate member 20 covering the elastic bodies 10 from above, and a floor slab 30 having a concrete part 31. The concrete part 31 has one concrete layer 32 consisting of concrete placed at an upper position relative to the intermediate member 20. The intermediate member 20 has a plurality of support parts 21 supported by the respective elastic bodies 10, and a bag part 22 provided in a space P between the elastic bodies 10. The bag part 22 can be changed into an expanded state and a contracted state by gassing and degassing, and the intermediate member 20 is installed to bring the bag part 22 into a contracted state. The present invention also relates to a construction method of the floating floor structure and the intermediate member 20.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a floating floor structure having a plurality of elastic bodies arranged on the bottom surface of a building frame, an intermediate member covering the plurality of elastic bodies from above, and a floor slab located above the intermediate member. The present invention also relates to a construction method for such a floating floor structure. Furthermore, the present invention relates to the intermediate member of the floating floor structure. [Background technology]

[0002] High-rise apartment buildings in urban areas are required to have parking spaces in proportion to the number of units. However, land prices in urban areas are extremely high, making it difficult to secure land for installing such parking spaces. Therefore, as one of the measures to ensure sufficient parking spaces in high-rise apartment buildings in urban areas, mechanical multi-story parking lots are being installed in the basement floors of the buildings.

[0003] However, when a mechanical parking structure operates, it generates large vibrations. Furthermore, this large vibration also generates large noises. In particular, when a mechanical parking structure is installed in the basement of a high-rise apartment building, such large vibrations and noises are extremely unpleasant for the residents of the apartment building. Therefore, a so-called floating floor structure is sometimes adopted to prevent the vibrations and noises.

[0004] A typical example of this is a floating floor (floating floor structure) including a plurality of anti-vibration rubbers (elastic bodies) arranged horizontally at intervals from one another on the bottom surface of the building frame, formwork support metal (intermediate member) arranged so as to cover the plurality of anti-vibration rubbers from above, and a floor slab with poured concrete (concrete portion) arranged above the formwork support metal, where the formwork support metal is made of materials such as steel frames and steel deck plates, or the formwork support metal is made of materials such as steel plate mounting parts and plywood formwork (see, for example, Patent Document 1).

[0005] In a typical example, the minimum resonance frequency of the floating floor structure is about 7 Hz to about 10 Hz, so that a sufficient vibration isolation effect can be obtained. However, the weight of the formwork is large, and a large amount of materials must be installed to construct the formwork. The construction work of such a formwork is complicated and requires a lot of labor. In turn, there is a risk of an increase in costs. Therefore, it is desirable to avoid the complicated construction work of the formwork and thereby to make the construction of the floating floor structure more efficient.

[0006] In response to this, various floating floor structures have been proposed that can make construction more efficient. One example is a vibration-isolating floor (floating floor structure) that includes a floor-use vibration-isolating foam plate placed on the bottom surface of the building's framework, a plurality of vibration-isolating elastomers (elastic bodies) loaded into the floor-use vibration-isolating foam plate so as to be spaced apart horizontally on the bottom surface of the framework, and concrete (concrete portion of the floor slab) poured onto the floor-use vibration-isolating foam plate and the vibration-isolating elastomers (see Patent Document 2, for example).

[0007] A second example is a vibration-isolating floor structure (floating floor structure) having a floor base (frame), a floor slab located above the floor base, a plate-shaped first vibration-isolating member made of foam material interposed between the floor base and the floor slab, and a rubber second vibration-isolating member arranged to penetrate the first vibration-isolating member, in which the first vibration-isolating member has multiple protrusions protruding in the height direction toward the floor base side, and a water flow channel is formed between adjacent protrusions (see, for example, Patent Document 3).

[0008] A third example is a floating floor (floor structure) constructed by a method including the steps of laying a sheet on a floor base (framework), arranging a plurality of vibration-proof materials (elastic bodies) on the sheet at intervals, each vibration-proof material having a rubber-like elastic body, a support member arranged on the upper part of the rubber-like elastic body, and a leveling bolt for moving the support member up and down, providing a cylindrical member above the support member of each vibration-proof material to surround the outer periphery of the leveling bolt, pouring concrete with reinforcing core members arranged around the plurality of vibration-proof materials, curing and hardening the concrete to form a floor slab, and rotating the leveling bolts in the cylindrical members to raise the floor slab above the floor base (see, for example, Patent Document 4).

[0009] A fourth example is a vibration-proof structure (floating floor structure) for a concrete structure having a floor (structure), a concrete floating floor (concrete part of the floor slab) located above the floor, and a foam and multiple vibration-proof materials (elastic bodies) interposed between the floor and the floating floor, in which the foam is adapted to reduce in volume or decompose in the presence of an alkaline component, and the foam and the multiple vibration-proof materials have the same thickness. In this vibration-proof structure, a gap is formed between the floor and the floating floor by reducing the volume or dissolving the foam with an alkaline aqueous solution or the like. (See, for example, Patent Document 5.) [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Publication No. 8-319711 [Patent Document 2] JP2003-35002A [Patent Document 3] Patent Publication No. 2018-123536 [Patent Document 4] JP 2003-328538 A [Patent Document 5] JP2007-303206A Summary of the Invention [Problem to be solved by the invention]

[0011] However, in a floating floor structure, rainwater, spring water, and other water may get into the bottom surface of the structure. In addition, cars are parked on the top surface of the floor slab, and the drive device of the mechanical multi-storey parking lot is also installed on this top surface. On the other hand, in a floating floor structure such as the above-mentioned first example, there is no sufficient gap between the bottom surface of the structure and the floor slab. Therefore, water cannot flow between the bottom surface of the structure and the floor slab, and may overflow onto the top surface of the floor slab. In this case, cars, the drive device of the mechanical multi-storey parking lot, and the like may be flooded.

[0012] Furthermore, in floating floor structures such as the first and second examples, a foam is interposed between the frame and the floor slab, so the minimum resonance frequency is about 17 Hz to about 20 Hz. Therefore, compared to typical examples of floating floor structures, sufficient vibration-proofing effects cannot be obtained. On the other hand, in floating floor structures such as the third and fourth examples, an air layer is interposed between the frame and the floor slab instead of a foam, so the minimum resonance frequency is about 7 Hz to about 10 Hz. Therefore, sufficient vibration-proofing effects can be obtained, similar to typical examples of floating floor structures.

[0013] However, in a floating floor structure such as the third example, it is difficult and large-scale to lift the floor slab using leveling bolts without damaging it. In addition, in order to prevent damage to the floor slab when it is lifted, it is necessary to make the floor slab strong. In this case, in the third example, in order to improve the strength, reinforcing bars are arranged along two horizontal planes spaced apart in the height direction in the concrete part of the floating floor. On the other hand, in a typical example of a floating floor structure, reinforcing bars are usually arranged along one horizontal plane in the concrete part of the floating floor. Therefore, compared to a typical example of a floating floor structure, the work of installing reinforcing bars increases, and the construction work becomes large-scale. In addition, there is a risk that the construction cost of the floating floor structure will increase.

[0014] In the floating floor structure of the fourth example, in order to reduce or dissolve the foam, it is necessary to pour a large amount of alkaline solution between the bottom surface of the structure and the floor slab. Such a large amount of alkaline solution is a large-scale operation. Furthermore, the large amount of alkaline solution and the cost of this operation may increase the construction cost of the floating floor structure.

[0015] In light of these circumstances, it is desirable for the floating floor structure of a building, its construction method, and intermediate components of the floating floor structure to provide a sufficient vibration-damping effect to the floating floor structure, and to streamline construction work to ensure a water circulation space between the frame and floor slab of the floating floor structure. [Means for solving the problem]

[0016] In order to solve the above problem, one embodiment of a floating floor structure comprises a plurality of elastic bodies arranged horizontally at intervals from each other on the bottom surface of a building's main body, an intermediate member that extends to cover the plurality of elastic bodies from above, and a floor slab having a concrete section, the concrete section having a single concrete layer made of concrete poured at a position above the intermediate member, the intermediate member having a plurality of support sections each supported by the plurality of elastic bodies, and a bag section arranged in the space between the plurality of elastic bodies, the bag section being configured to be changeable between an expanded state in which it is expanded by inflating so as to abut against the bottom surface of the main body, and a contracted state in which it is contracted by degassing so as to move away from the bottom surface of the main body, and the intermediate member is installed to set the bag section in the contracted state.

[0017] A construction method for a floating floor structure according to one embodiment includes an elastic body installation step of arranging a plurality of elastic bodies horizontally spaced apart from each other on the bottom surface of a building's structure, an intermediate member installation step of arranging an intermediate member that spreads out to cover the plurality of elastic bodies from above, wherein the plurality of support portions of the intermediate member are each arranged to be supported by the plurality of elastic bodies and the bag portion of the intermediate member is arranged in the space between the plurality of elastic bodies, an intermediate member expansion step of expanding the bag portion by introducing gas so as to abut against the bottom surface of the structure, a concrete portion formation step of pouring concrete at a position above the intermediate member to form one concrete layer of the concrete portion in the floor slab, and an intermediate member contraction step of contracting the bag portion by venting so as to move it away from the bottom surface of the structure.

[0018] In one embodiment, an intermediate member of a floating floor structure extends from above to cover a number of elastic bodies that are arranged horizontally at intervals on the bottom surface of a building's main body, and is configured to be able to support concrete poured at a position above the intermediate member.The intermediate member of a floating floor structure comprises a number of support parts that can be arranged to be supported by the multiple elastic bodies, and a bag part that can be arranged horizontally between the multiple support parts, and the bag part is configured to be changeable between an expanded state in which it is expanded by inflating gas so that it can abut against the bottom surface of the main body, and a contracted state in which it is contracted by releasing gas so that it can move away from the bottom surface of the main body. Effect of the Invention

[0019] In one embodiment of the floating floor structure of a building, the construction method thereof, and the intermediate member of the floating floor structure, it is possible to provide the floating floor structure with a sufficient vibration-damping effect, and to improve the efficiency of construction work to ensure a water circulation space between the main body and floor slab of the floating floor structure. [Brief description of the drawings]

[0020] [Figure 1]FIG. 1 is a cross-sectional view that shows a schematic diagram of the floating floor structure according to the first embodiment with the bag portion of the intermediate member contracted. [Diagram 2] FIG. 2 is a cross-sectional view taken along line XX in FIG. [Diagram 3] FIG. 3 is a cross-sectional view that shows a schematic diagram of the floating floor structure according to the first embodiment with the bag portion of the intermediate member inflated. [Figure 4] FIG. 4 is a cross-sectional view taken along line YY in FIG. [Diagram 5] FIG. 5 is a flowchart for explaining the construction method of the floating floor structure according to the first embodiment. [Figure 6] FIG. 6 is a cross-sectional view that shows a schematic view of the floating floor structure according to the second embodiment with the bag portion of the intermediate member contracted. [Figure 7] FIG. 7 is a flowchart for explaining the construction method of the floating floor structure according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The floating floor structure of a building and its construction method according to the first and second embodiments will be described. The floating floor structure according to each embodiment includes an intermediate member. In each embodiment, the floating floor structure is applied to the basement floor of a building in which a mechanical multi-story parking lot is installed. However, the floating floor structure can also be applied to the above-ground floor of a building. Furthermore, devices other than the mechanical multi-story parking lot can also be installed on the floor to which the floating floor structure is applied. Such devices do not have to be installed on the floor to which the floating floor structure is applied.

[0022] "First embodiment" The floating floor structure and its construction method according to the first embodiment will be described below.

[0023] "Outline of floating floor structure" 1 to 4, the floating floor structure according to this embodiment is generally configured as follows. The floating floor structure is applied to the bottom surface 1a of the framework 1 of a building. A mechanical multi-story parking lot (not shown) is installed on the floating floor structure. Vehicles (not shown) such as automobiles are capable of running on the floating floor structure, and such vehicles are parked in the mechanical multi-story parking lot on the floating floor structure.

[0024] The floating floor structure has a plurality of elastic bodies 10. The plurality of elastic bodies 10 are arranged on the bottom surface 1a of the framework 1 at intervals in the horizontal direction. The floating floor structure has an intermediate member 20. The intermediate member 20 is arranged so as to cover the plurality of elastic bodies 10 from above. The intermediate member 20 is also configured so as to be able to receive concrete poured from above.

[0025] The floating floor structure has a floor slab 30. The floor slab 30 has a concrete portion 31. The concrete portion 31 has one concrete layer 32 made of concrete poured at a position above the intermediate member 20. Hereinafter, this one concrete layer 32 will be referred to as a first concrete layer 32 as necessary.

[0026] The intermediate member 20 has a plurality of support parts 21. The plurality of support parts 21 can be arranged so as to be supported by the plurality of elastic bodies 10, respectively. The intermediate member 20 also has one or a plurality of bag parts 22 that can be arranged in the space P between the plurality of elastic bodies 10. In particular, it is preferable that the intermediate member 20 has a plurality of bags 22.

[0027] The bag portion 22 is configured to be changeable between an inflated state in which it is inflated by inflating the bag portion 22 with gas so that it abuts against the bottom surface 1a of the body 1 (hereinafter referred to as the "expanded state" as necessary) as shown in Figures 3 and 4, and a contracted state in which it is inflated by degassing the bag portion 22 with the bag portion 22 away from the bottom surface 1a of the body 1 (hereinafter referred to as the "contracted state" as necessary) as shown in Figures 1 and 2.

[0028] 1 and 2, the intermediate member 20 is installed so as to ultimately bring the bag portion 22 into a contracted state. That is, when the floating floor structure is in a completed state or a finished state, in the intermediate member 20, the multiple support parts 21 are respectively supported by the multiple elastic bodies 10, the bag portion 22 is disposed in the space P between the multiple elastic bodies 10, and the bag portion 22 is in a contracted state.

[0029] "Details of the floating floor structure" 1, 3 and 4, the floating floor structure according to this embodiment can be specifically configured as follows. In the floating floor structure, the concrete portion 31 has only a first concrete layer 32. As shown in Figs. 1 and 3, the floating floor structure also has a plurality of base platforms 2. The multiple base platforms 2 are disposed on the bottom surface 1a of the framework 1 so as to respectively support the multiple elastic bodies 10 from below. The base platforms 2 are in a bundle.

[0030] However, at least one of the multiple bases may have backing mortar, level mortar, etc. in addition to the burrs. At least one of the multiple bases may have backing mortar, level mortar, etc. instead of the burrs. Furthermore, the floating floor structure may be configured so as not to have at least one of the multiple bases. In this case, in the places where the base is not provided, the elastic body may be directly abutted against the bottom surface of the framework.

[0031] As shown in Figures 1, 3 and 4, the floating floor structure has one sheet member 40 located between the intermediate member 20 and the floor slab 30. Concrete is poured onto this sheet member 40. However, the floating floor structure can also have two or more sheet members overlapping each other. The floating floor structure can also be configured without a sheet member.

[0032] Furthermore, the sheet member 40 is configured to be impermeable to poured concrete. The sheet member 40 may be a plastic sheet. However, the sheet member may also be a vinyl sheet, a woven fabric, a non-woven fabric, etc.

[0033] The floating floor structure has mounting members 50 configured to mount each support portion 21 of the intermediate member 20 to the corresponding elastic body 10. Each support portion 21 of the intermediate member 20 is fixed in a sandwiched state between the elastic body 10 corresponding to this support portion 21 and the mounting member 50. The sheet member 40 covers the intermediate member 20 and the multiple mounting members 50 from above.

[0034] "Elastic body details" 1 to 3, the elastic body 10 can be specifically configured as follows. In the floating floor structure, each of the elastic bodies 10 is an anti-vibration rubber. However, at least one of the elastic bodies can be something other than an anti-vibration rubber.

[0035] The intervals between the multiple elastic bodies 10 are set taking into consideration the rigidity and support force required for the multiple bag portions 22 arranged between them to support the floor slab 30 in an expanded state, the vibration isolation performance of the floating floor structure, etc. Fig. 2 shows, as an example, the multiple elastic bodies 10 arranged in a matrix in a plan view. However, the arrangement of the multiple elastic bodies 10 is not limited to this.

[0036] "Details of intermediate parts" 1 to 4, the intermediate member 20 can be specifically configured as follows: As shown in Fig. 1, Fig. 3 and Fig. 4, in the intermediate member 20, the upper surface region 21a and the lower surface region 21b of each support portion 21 are formed to be approximately flat.

[0037] In the contracted state, the upper surface region 22a of each bag portion 22 remains substantially flat or contracts downwardly to approach the upper surface region 22a of the opposing bag portion 22. In the inflated state, the upper surface region 22a of each bag portion 22 remains substantially flat or expands upwardly to move away from the lower surface region 22b of the opposing bag portion 22.

[0038] The upper surface area 22a of each bag portion 22 is preferably set so as to be substantially aligned with the upper end of each elastic body 10 in the up-down direction in the inflated state, or to be located lower than the upper end of each elastic body 10. The upper surface area 22a of such a bag portion 22 can be made rigid so as to suppress upward expansion. Alternatively, the upper surface area 22a of the bag portion 22 can be pressed down by a rigid member so as to suppress upward expansion.

[0039] 3 and 4, in the inflated state, the lower surface region 22b of each bag portion 22 expands downward so as to move away from the upper surface region 22a of the opposing bag portion 22. In the deflated state, the lower surface region 22b of each bag portion 22 contracts upward so as to approach the upper surface region 22a of the opposing bag portion 22.

[0040] The gas used to inflate each bag portion 22 is preferably air. However, the gas used to inflate the bag portion may be other than air. For example, the gas may be helium gas, etc.

[0041] As shown in Figs. 1 to 3, the support portion 21 of the intermediate member 20 connects the bag portions 22 adjacent to each other in a first horizontal direction (hereinafter, referred to as "bag portions 22 adjacent to each other in the first direction" as necessary). Each bag portion 22 extends along a second horizontal direction that is substantially perpendicular to the first direction. The intermediate member 20 has the bag portions 22 that are spaced apart from each other in the first direction. Each bag portion 22 extends across the support portions 21 that are lined up in a row in the second direction.

[0042] As shown in Fig. 2, the intermediate member 20 has a bridge portion 23 that connects adjacent support portions 21 in the second direction (hereinafter, referred to as "adjacent support portions 21" as necessary). The bridge portion 23 also connects adjacent bag portions 22 in the first direction. An upper surface region 23a and a lower surface region 23b of the bridge portion 23 are formed to be approximately flat. The bridge portion 23 can also be located on the outer periphery of the intermediate member 20.

[0043] However, instead of being connected by a bridge, the multiple bag parts can be integrally connected to each other in the first direction so as to allow air to flow between them. Each bag part can also extend across only one support part in the second direction. In this case, among the multiple supports, those adjacent to each other in the second direction are provided and connected by a bridge.

[0044] 2 and 4, the intermediate member 20 has a plurality of valves 24. Each valve 24 is configured to allow gas to flow between the exterior and interior of the intermediate member 20. Each valve 24 is configured to allow gas to flow from the exterior of the intermediate member 20 through that valve 24 into the interior of the intermediate member 20. Each valve 24 is also configured to allow gas to flow from the interior of the intermediate member 20 through that valve 24 to the exterior of the intermediate member 20. However, the intermediate member may have only one valve.

[0045] The intermediate member 20 also has a plurality of communication passages 25. Each communication passage 25 is configured to communicate gas between adjacent bag portions 22 in the first direction. The plurality of communication passages 25 are disposed in the lower surface region 23b of the bridge portion 23 of the intermediate member 20.

[0046] However, the intermediate member may be configured not to have a communication passage. In this case, the multiple valves may be provided in the multiple bag portions, respectively. At least one of the multiple communication passages may be disposed on the upper surface of the intermediate member. Furthermore, when adjacent bag portions are provided in the second direction, the communication passage may be configured to communicate gas between them.

[0047] Each bag section 22 has at least one valve 24. Each valve 24 is disposed in the lower section 22b of the bag section 22 in which it is provided. In this case, each valve 24 can be disposed so as to avoid concrete being poured for the floor slab 30. Furthermore, if an extension tube (not shown) is routed from each valve 24 to the relatively wide upper space of the intermediate member 20, gas can be injected from the extension tube by a pump (not shown) installed in the upper space of the intermediate member 20.

[0048] However, a portion of the bag portions may be configured not to have a valve. At least one of the valves may be provided in an upper region of the bag portion instead of in a lower region of the bag portion. At least one of the valves may be provided in a communication passage instead of in the bag portion.

[0049] 1, 3 and 4, the intermediate member 20 has an upper layer material 26 and a lower layer material 27. The upper layer material 26 is located above the lower layer material 27. The lower layer material 27 is located at the lower end of the intermediate member 20.

[0050] The upper layer material 26 has a plurality of upper layer support regions 26a respectively corresponding to the upper surface regions 21a of the plurality of support portions 21. The lower layer material 27 has a plurality of lower layer support regions 27a respectively corresponding to the lower surface regions 21b of the plurality of support portions 21. The upper layer and lower layer support regions 26a, 27a overlap and are joined together.

[0051] The upper layer material 26 has a plurality of upper bag sections 26b corresponding to the upper surface sections 22a of the plurality of bag sections 22. The lower layer material 27 has a plurality of lower bag sections 27b corresponding to the lower surface sections 22b of the plurality of bag sections 22. An internal space 22c of the bag section 22 in which gas accumulates is formed between the upper and lower bag sections 26b, 27b.

[0052] The upper layer material 26 has a plurality of upper layer bridging sections 26c corresponding to the upper surface sections 23a of the plurality of bridging sections 23. The lower layer material 27 has a plurality of lower layer bridging sections 27c corresponding to the lower surface sections 23b of the plurality of bridging sections 23. The space formed between these upper layer and lower layer bridging sections 26c, 27c can be used as a communication passage 25.

[0053] The lower layer material 27 has flexibility such that it can expand by gassing the intermediate member 20 and can contract by degassing the intermediate member 20. From the viewpoint of maintaining the flatness, the upper layer material 26 can have rigidity such that it can maintain its shape by both gassing and degassing the intermediate member 20. In this case, the rigidity of the upper layer material 26 can be made higher than the rigidity of the lower layer material 27. Moreover, from the viewpoint of being able to expand and contract in the same way as the lower layer material 27, the upper layer material 26 can have flexibility similar to that of the lower layer material 27.

[0054] For example, each of the upper layer material 26 and the lower layer material 27 can be made of woven fabric. When such upper layer material 26 and lower layer material 27 have flexibility, the fibers used in each of the upper layer material 26 and the lower layer material 27 can be refined fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, etc. On the other hand, when the rigidity of the upper layer material 26 is higher than the rigidity of the lower layer material 27, the fibers used in the upper layer material 26 can be inorganic fibers such as metal fibers, carbon fibers, etc. The fibers used in the lower layer material 27 can be refined fibers, regenerated fibers, semi-synthetic fibers, synthetic fibers, etc.

[0055] However, the fibers used in at least one of the upper layer material and the lower layer material may be other than those mentioned above. At least one of the upper layer material and the lower layer material may be made of a material other than woven fabric. For example, at least one of the upper layer material and the lower layer material may be made of nonwoven fabric, rubber, or plastic.

[0056] Although not specifically shown, the intermediate member 20 may have a plurality of modules configured to divide the intermediate member 20 into a plurality of bag portions 22. In this case, each module has one bag portion 22. However, each module may have two or more bag portions.

[0057] Each module also has a support 21. Each module may also have an elastic body 10 fixed to the support 21. The support parts 21 of adjacent modules may be stacked on top of each other in the vertical direction. In this case, the elastic body 10 may be fixed to the lower one of the stacked support parts 21. By using such a plurality of modules, the intermediate member 20 can be efficiently installed.

[0058] "Floor slab details" 1, 3 and 4, the floor slab 30 can be specifically configured as follows. The top surface 31a of the concrete portion 31 forms the top surface 30a of the floor slab 30, i.e., the floor surface of the basement floor. A mechanical parking lot (not shown) is installed on this top surface 31a. In addition, vehicles (not shown) run and stop on the top surface 31a.

[0059] The floor slab 30 has one reinforcing bar group 60 consisting of multiple reinforcing bars 60a embedded in the concrete portion 31, specifically, in the first concrete layer 32. In one reinforcing bar group 60, the multiple reinforcing bars 60a are arranged along one plane along the horizontal direction in the concrete portion 31. One reinforcing bar group 60 is embedded in the first concrete layer 32. It is preferable that only such one reinforcing bar group 60 is embedded in the concrete portion 31 of the floor slab 30. However, multiple reinforcing bar groups can also be embedded in the concrete portion of the floor slab with intervals in the vertical direction.

[0060] "How to construct a floating floor structure" 1 to 5, the construction method of the floating floor structure according to this embodiment is as follows: First, in the construction method of the floating floor structure, a plurality of elastic bodies 10 are arranged horizontally at intervals from each other on the bottom surface 1a of the building frame 1 (elastic body installation process S1).

[0061] An intermediate member 20 is placed so as to extend so as to cover the multiple elastic bodies 10 from above (intermediate member installation step S2). At this time, the multiple support parts 21 of the intermediate member 20 are placed so as to be supported by the multiple elastic bodies 10. Furthermore, the bag part 22 of the intermediate member 20 is placed in the space P between the multiple elastic bodies 10.

[0062] Next, the bag portion 22 is expanded by introducing gas so as to abut against the bottom surface 1a of the skeleton 1 (intermediate member expansion step S3). Concrete is poured from above the intermediate member 20 to form one concrete layer 32 of the concrete portion 31 in the floor slab 30 (concrete portion formation step S4). The bag portion 22 is contracted by degassing so as to move away from the bottom surface 1a of the skeleton 1 (intermediate member contraction step S5).

[0063] That is, the construction method according to this embodiment includes an elastic body installation step S1, an intermediate member installation step S2, an intermediate member expansion step S3, a concrete portion formation step S4, and an intermediate member contraction step S5. The floating floor structure according to this embodiment can be obtained using these steps S1 to S5.

[0064] Furthermore, the construction method of the floating floor structure according to this embodiment can be as follows: In the concrete portion forming step S4 of the construction method of the floating floor structure, concrete is poured onto the intermediate member 20, thereby forming the first concrete layer 32 located at the lower end of the concrete portion 31 (concrete pouring step S4a). Furthermore, the first concrete layer 32 can be dried to harden (concrete drying step S4b).

[0065] As described above, the floating floor structure according to this embodiment is a floating floor structure comprising a plurality of elastic bodies 10 arranged horizontally at intervals from each other on the bottom surface 1a of the building structure 1, an intermediate member 20 extending to cover the plurality of elastic bodies 10 from above, and a floor slab 30 having a concrete portion 31, the concrete portion 31 having a single concrete layer 32 made of concrete poured at a position above the intermediate member 20, the intermediate member 20 having a plurality of support portions 21 each supported by the plurality of elastic bodies 10, and a bag portion 22 arranged in the space P between the plurality of elastic bodies 10, the bag portion 22 being configured to be changeable between an expanded state in which it is expanded by gas supply so as to abut against the bottom surface 1a of the building structure 1, and a contracted state in which it is contracted by gas release so as to move away from the bottom surface 1a of the building structure 1, and the intermediate member 20 being installed so as to put the bag portion 22 in the contracted state.

[0066] The construction method of the floating floor structure according to this embodiment includes an elastic body installation step S1 for arranging a plurality of elastic bodies 10 horizontally spaced apart from each other on the bottom surface 1a of the structure 1 of a building, an intermediate member installation step S2 for arranging an intermediate member 20 that spreads so as to cover the plurality of elastic bodies 10 from above, in which the plurality of support portions 21 of the intermediate member 20 are arranged so as to be supported by the plurality of elastic bodies 10, and the bag portion 22 of the intermediate member 20 is arranged in the space P between the plurality of elastic bodies 10, an intermediate member expansion step S3 for expanding the bag portion 22 by introducing gas so as to abut against the bottom surface 1a of the structure 1, a concrete portion formation step S4 for pouring concrete at a position above the intermediate member 20 to form one concrete layer 32 of the concrete portion 31 in the floor slab 30, and an intermediate member contraction step S5 for contracting the bag portion 22 by degassing so as to move it away from the bottom surface 1a of the structure 1.

[0067] The intermediate member 20 of the floating floor structure in this embodiment is an intermediate member 20 of the floating floor structure that extends from above to cover a plurality of elastic bodies 10 that are arranged horizontally at intervals from each other on the bottom surface 1a of the structure 1 of a building, and is configured to be able to support concrete poured at a position above the intermediate member 20.The intermediate member 20 of the floating floor structure is provided with a plurality of support parts 21 that can be arranged so as to be supported by the plurality of elastic bodies 10, and a bag part 22 that can be arranged horizontally between the plurality of support parts 21, and is configured to be changeable between an expanded state in which the bag part 22 is expanded by adding gas so that it can abut against the bottom surface 1a of the structure 1, and a contracted state in which the bag part 22 is contracted by releasing gas so that it can move away from the bottom surface 1a of the structure 1.

[0068] According to such a floating floor structure and its construction method, as well as the intermediate member 20 of the floating floor structure, the water circulation space P can be easily formed between the skeleton 1 and the floor slab 30. Therefore, the construction work for securing the water circulation space P between the skeleton 1 and the floor slab 30 can be made efficient. Furthermore, the water circulation space P functions as an air layer between the skeleton 1 and the floor slab 30. Therefore, the minimum resonance frequency can be set to about 7 Hz to about 10 Hz, and as a result, a sufficient vibration-proofing effect can be obtained.

[0069] "Second embodiment" The floating floor structure according to the second embodiment and its construction method will be described below. The floating floor structure according to this embodiment is similar to the floating floor structure according to the first embodiment, except that the concrete part of the floor slab has an additional concrete layer (second concrete layer) in addition to one concrete layer (first concrete layer). Therefore, the floating floor structure according to this embodiment and its components use the same names and symbols as the floating floor structure according to the first embodiment and its components.

[0070] "Outline of floating floor structure" 6, the floating floor structure according to this embodiment is generally configured as follows: In the floating floor structure according to this embodiment, the concrete portion 31 of the floor slab 30 has one concrete layer (first concrete layer) 32 and one additional concrete layer 33.

[0071] That is, the concrete section 31 has two concrete layers 32, 33. Hereinafter, the additional concrete layer 33 will be referred to as a second concrete layer 33, as necessary. However, the concrete section may also have three or more concrete layers. That is, the concrete section may have a plurality of concrete layers.

[0072] In this concrete section 31, the first concrete layer 32 is located at the lower end of the concrete section 31. The second concrete layer 33 is overlapped above the first concrete layer 32. The second concrete layer 33 is made of concrete that is poured separately from the concrete of the first concrete layer 32.

[0073] "Floor slab details" 6, the floor slab 30 can be specifically configured as follows: The top surface 31a of the concrete portion 31 corresponds to the top surface 33a of the second concrete layer 33. In other words, the top surface 31a of the concrete portion 31 corresponds to the top surface 33a of the uppermost concrete layer 33.

[0074] Top surface 33a of second concrete layer 33 is flatter than top surface 32a of first concrete layer 32. In other words, top surface 33a of uppermost concrete layer 33 is flatter than top surfaces 32a of remaining concrete layers 32. Bottom surface 31b of concrete portion 31 corresponds to bottom surface 32b of first concrete layer 32. The thickness of first concrete layer 32 is smaller than the thickness of second concrete layer 33.

[0075] However, all concrete layers of the concrete section may be substantially equally flat. The thickness of the first concrete layer may be substantially equal to the thickness of the second concrete layer. The thickness of the first concrete layer may be greater than the thickness of the second concrete layer.

[0076] "How to construct a floating floor structure" 6 and 7, the construction method of the floating floor structure according to this embodiment is generally as follows: The construction method according to this embodiment includes the elastic body installation step S1, intermediate member installation step S2, intermediate member expansion step S3, concrete portion formation step S4, and intermediate member contraction step S5, which are similar to the construction method according to the first embodiment.

[0077] The construction method of the floating floor structure according to this embodiment further includes an additional concrete portion forming step S40 as follows. That is, in the additional concrete portion forming step S40, after the concrete portion forming step S4 and before the intermediate member shrinking step S5, additional concrete is poured from above the concrete poured in the concrete portion forming step S4 in order to form one additional concrete layer 33 of the concrete portion 31. However, the additional concrete portion forming step can also be performed after the intermediate member shrinking step.

[0078] In such an additional concrete portion forming step S40, concrete is poured onto the first concrete layer 32, thereby forming a second concrete layer 33 overlapping the first concrete layer 32 within the concrete portion 31 (additional concrete pouring step S40a). Furthermore, the second concrete layer 33 is dried to harden (additional concrete drying step S40b).

[0079] As described above, the floating floor structure and construction method thereof, as well as the intermediate member 20 of the floating floor structure according to this embodiment, can provide the same effects as those of the floating floor structure and intermediate member 20 of the first embodiment. In addition, the floating floor structure according to this embodiment can provide the following effects.

[0080] In the floating floor structure of this embodiment, the one concrete layer 32 is located at the lower end of the concrete section, and the concrete section 31 further has one additional concrete layer 33 overlapping the one concrete layer 32, and the one additional concrete layer 33 is made of concrete poured separately from the concrete of the one concrete layer 32.

[0081] The construction method of the floating floor structure in this embodiment further includes an additional concrete section formation process S40, in which additional concrete is poured from above the concrete poured in the concrete section formation process S4 to form an additional concrete layer 33 of the concrete section 31 after the concrete section formation process S4 and before the intermediate member shrinkage process S5, or after the intermediate member shrinkage process S5.

[0082] In such a construction method of a floating floor structure, for example, the work of forming the second concrete layer 33 on the hardened first concrete layer 32 is easy, and the top surface 33a of the second concrete layer 33 is also easy to flatten during this work. In particular, when the top surface 33a of the second concrete layer 33 is used as the top surface 30a of the floor slab 30, it is possible to ensure performance such as flatness that is normally required to stably park a vehicle (not shown) and stably install a mechanical multi-storey parking lot (not shown). Therefore, it is possible to efficiently carry out construction work to ensure a water circulation space P between the framework 1 and the floor slab 30 while ensuring the normally required performance of the floating floor structure.

[0083] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and the present invention can be modified and changed based on the technical concept thereof. [Explanation of symbols]

[0084] 1...Structure, 1a...Bottom 10...elastic body, 20...intermediate member, 21...support portion, 22...bag portion, 30...floor slab, 31...concrete portion, 32...concrete layer, first concrete layer, 33...additional concrete layer, second concrete layer P…Space, circulation space S1: Elastic body installation process, S2: Intermediate member installation process, S3: Intermediate member expansion process, S4: Concrete portion formation process, S5: Intermediate member contraction process, S40: Additional concrete portion formation process

Claims

1. A plurality of elastic bodies arranged horizontally at intervals on a bottom surface of a building frame; an intermediate member that extends so as to cover the plurality of elastic bodies from above; A floor slab having a concrete section; Equipped with A floating floor structure, wherein the concrete portion has one concrete layer made of concrete poured at a position above the intermediate member, the intermediate member has a plurality of support portions each supported by the plurality of elastic bodies, and a bag portion disposed in a space between the plurality of elastic bodies, The bag portion is configured to be changeable between an expanded state in which the bag portion is expanded by a gas inlet so as to abut against the bottom surface of the body, and a contracted state in which the bag portion is contracted by a gas outlet so as to move away from the bottom surface of the body, A floating floor structure, wherein the intermediate member is installed so as to place the bag portion in the contracted state.

2. The one concrete layer is located at the lower end of the concrete section, the concrete section further comprises an additional concrete layer overlying the one concrete layer; 2. The floating floor structure of claim 1, wherein the one additional concrete layer comprises concrete poured separately from the concrete of the one concrete layer.

3. An elastic body installation process for arranging a plurality of elastic bodies horizontally at intervals on a bottom surface of a building frame; an intermediate member installation step of arranging an intermediate member that spreads so as to cover the plurality of elastic bodies from above, in which a plurality of support parts of the intermediate member are arranged so as to be supported by the plurality of elastic bodies, and a bag part of the intermediate member is arranged in a space between the plurality of elastic bodies; an intermediate member expanding step of expanding the bag portion by a gas inflator so as to abut against a bottom surface of the body; A concrete portion forming process of pouring concrete at a position above the intermediate member to form one concrete layer of the concrete portion of the floor slab; an intermediate member shrinking process of shrinking the bag portion by degassing so as to separate the bag portion from the bottom surface of the body; A method for constructing a floating floor structure, including:

4. The construction method for a floating floor structure as described in claim 3, further comprising an additional concrete portion forming process of pouring additional concrete from above the concrete poured in the concrete portion forming process to form one additional concrete layer of the concrete portion after the concrete portion forming process and before the intermediate member shrinking process, or after the intermediate member shrinking process.

5. An intermediate member of a floating floor structure that extends from above to cover a plurality of elastic bodies that are horizontally spaced apart from one another on the bottom surface of a building's framework, and that is configured to support concrete poured at a position above the intermediate member, A plurality of support parts that can be arranged to be supported by the plurality of elastic bodies, respectively; a bag portion that is horizontally positionable between the plurality of support portions; Equipped with An intermediate member of a floating floor structure, wherein the bag portion is configured to be changeable between an expanded state in which it is inflated by adding gas so that it can abut against the bottom surface of the main body, and a contracted state in which it is contracted by releasing gas so that it can separate from the bottom surface of the main body.

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