JP6210799B2 - Double floor structure - Google Patents

Description

  The present invention relates to a double floor structure.

  There is known a double floor structure that forms an underfloor space between a floor slab supported by a forward beam and a floor (free access floor) of a server room or a clean room (for example, see Patent Document 1). In this type of underfloor space, for example, wiring and piping are laid.

  As a double floor structure, a structure in which an underfloor space is formed under the floor of a server room or the like by a truss beam is known (see, for example, Patent Document 2).

JP 2003-3599 A JP 2011-174286 A

  By the way, it is conceivable to install a reverse beam using the underfloor space formed between the floor of the server room or the like described above and the floor slab. However, in this case, since the reverse beam protrudes from the floor slab to the underfloor space, it may be difficult for an operator to enter and leave the underfloor space.

  The present invention has been made in consideration of the above facts, and it is an object of the present invention to make it easy for an operator to enter and leave the space under the floor.

The double floor structure according to the first aspect includes a floor slab, a double floor which is disposed above the floor slab and forms an underfloor space with the floor slab, and projects from the floor slab to the underfloor space. And a reverse beam supporting the double floor and having an opening penetrating in the beam width direction.

According to the double floor structure according to the first aspect , the reverse beam is formed with an opening penetrating in the beam width direction. Thereby, an operator can go in and out of the underfloor space through the opening.

The double floor structure according to the second aspect is the double floor structure according to the first aspect , wherein the double floor is ventilated in the vertical direction and an electronic equipment room floor portion on which the electronic equipment is installed And an air conditioner room floor portion on which the air conditioner is installed, and the air conditioner room floor portion can send cooling air from the air conditioner to the space under the floor along the reverse beam. An opening is formed.

According to the double floor structure according to the second aspect , when the cooling air is blown along the reverse beam from the air conditioner installed on the floor for the air conditioner room to the underfloor space through the ventilation opening, the cooling air is electronic equipment. Passes up and down the room floor. Thereby, the electronic device installed in the floor part for electronic device rooms is cooled.

  As described above, in the present invention, the cooling air can be blown from the air conditioner installed on the floor for the air conditioner room to the electronic device via the underfloor space. Therefore, in this invention, it is not necessary to install an air conditioner in the underfloor space. Therefore, compared with the case where an air conditioner is installed in the underfloor space, the height of the underfloor space can be minimized.

The double floor structure according to the third aspect is the double floor structure according to the second aspect , wherein the opening can be closed by a cover material.

According to the double floor structure according to the third aspect , for example, an electronic device is installed on the electronic device room floor on one side and an electronic device is installed on the other electronic device room floor across the reverse beam. If the cooling air is blown from the air conditioner only to the underfloor space on one side, the opening of the reverse beam is covered with the cover material, so that the underfloor space on the one side is moved to the underfloor space on the other side. It is possible to suppress the cooling air from leaking. Therefore, it is possible to increase the cooling efficiency of the electronic device installed on the electronic device room floor on one side.

The double floor structure according to a fourth aspect is the double floor structure according to any one of the first aspect to the third aspect , wherein a plurality of the reverse beams are provided at intervals in the beam width direction and adjacent to each other. A small beam supporting the double floor is installed on the reverse beam.

According to the double floor structure which concerns on a 4th aspect , the rigidity of a double floor can be improved by supporting a double floor with the small beam constructed by the adjacent reverse beam.

The double floor structure according to a fifth aspect is the double floor structure according to the fourth aspect , wherein the beam is installed on the reverse beam.

According to the double floor structure which concerns on a 5th aspect , the height of underfloor space can be made high, without increasing a weight by installing a small beam on an inverted beam.

  As described above, according to the double floor structure according to the present invention, it is possible to facilitate entry / exit of an operator to / from the underfloor space.

It is the 1-1 sectional view taken on the line of FIG. 2 which shows the structure to which the double floor structure which concerns on one Embodiment of this invention was applied. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1 showing a structure to which a double floor structure according to an embodiment of the present invention is applied. It is an expanded sectional view of FIG. It is an expanded sectional view corresponding to Drawing 1 showing an air-conditioner room and a server room to which a modification of a double floor structure concerning one embodiment of the present invention is applied. It is an enlarged plan view corresponding to Drawing 2 showing the floor slab to which the modification of the double floor structure concerning one embodiment of the present invention was applied. It is a side view which shows the example of installation of the small beam in one Embodiment of this invention.

  Hereinafter, a double floor structure according to an embodiment of the present invention will be described with reference to the drawings. In addition, the arrow X and the arrow Y which are suitably shown in each figure have shown the two horizontal directions orthogonal to each other.

  FIG. 1 shows a structure 12 to which a double floor structure 10 according to this embodiment is applied. The structure 12 is used as, for example, a data center, and a server room 30, a power supply room 40, and an air conditioner room 50 are provided on a predetermined floor thereof. The structure 12 has a seismic isolation structure, and a plurality of columns 14 are supported by a foundation slab 18 via a seismic isolation device 16 such as a laminated rubber bearing. The structure 12 is not limited to a seismic isolation structure. Various structures can be applied to the structure 12. For example, the pillar 14 may be directly supported by the foundation slab 18.

  As shown in FIG. 2, the plurality of columns 14 are formed of reinforced concrete or the like, and are arranged in the X direction and the Y direction. In addition, an inverted beam 20 is installed in the X direction and a cross beam 22 is installed in the Y direction on the plurality of columns 14. A plurality of reverse beams 20 (three or more in the present embodiment) are provided at intervals in the Y direction (beam width direction), and a plurality of cross beams 22 are provided at intervals in the X direction. A server room 30 (see FIG. 1) in which a plurality of electronic devices 32 such as an information processing apparatus are installed is provided on an area partitioned by the reverse beam 20 and the cross beam 22. The server room 30 is partitioned by a partition wall or the like (not shown).

  In the present embodiment, the cross beam 22 is a forward beam, and is disposed along the direction intersecting the reverse beam 20. Further, the reverse beam 20 and the cross beam 22 are formed of reinforced concrete.

  Each column 14 is joined with jump beams 24 and 26 that jump to the opposite side of the reverse beam 20. The jump beams 24 and 26 are forward beams, and a power supply chamber 40 (see FIG. 1) in which a standby power source 42 is installed is provided on a region defined by the jump beam 24 and the cross beam 22 on one side. An air conditioner room 50 (see FIG. 1) in which an air conditioner 52 is installed is provided on a region defined by the other jump beam 26 and the cross beam 22. That is, the power supply room 40 and the air conditioner room 50 are provided on both sides of the server room 30 in the X direction. An outer wall 27 is attached to the tip of the jump beams 24 and 26.

  As shown in FIG. 3, a floor slab 28 made of reinforced concrete is disposed below the reverse beam 20 and above the cross beam 22 and the jump beam 24. The floor slab 28 is joined to the lower end portion of the reverse beam 20 and joined to the upper end portions of the cross beam 22 and the jump beam 24. The floor slab 28 is supported by the reverse beam 20, the cross beam 22, and the jump beams 24 and 26. The floor slab 28 may be formed of precast concrete, half precast concrete, ALC (lightweight cellular concrete), or the like.

  Here, the double floor structure 10 is applied to the server room 30, the power supply room 40, and the air conditioner room 50, and a maintenance space (underfloor space) M is formed under each floor. Specifically, on the upper side of the floor slab 28, a double floor F constituting the floor of each server room 30, the power supply room 40, and the air conditioner room 50 is disposed. A maintenance space M is formed between the double floor F and the floor slab 28.

  In the maintenance space M, laying materials such as wiring and piping (not shown) are laid. Cooling air is introduced into the maintenance space M from the air conditioner 52 installed in the air conditioner room 50, and the electronic device 32 in the server room 30 and the standby power supply device 42 in the power supply room 40 are connected via the maintenance space M. It is designed to be cooled. Therefore, the height H of the maintenance space M, that is, the volume of the maintenance space M under the floor of the server room 30 (= height H × the floor area of the server room 30) is the cooling required for cooling the plurality of electronic devices 32. It is set according to the wind volume.

  The double floor F includes a server room floor 30A, a power room floor 40A, and an air conditioner room floor 50A, which are the floors of each server room 30, the power room 40, and the air conditioner room 50. Yes. The server room floor portion 30A as the electronic device room floor portion is formed by, for example, a mesh-like floor panel that allows ventilation in the vertical direction, and the electronic device 32 is installed thereon.

  The server room floor 30A is supported by a plurality of small beams 34 installed on the adjacent reverse beams 20. The small beam 34 is formed of H-shaped steel, and is installed on the reverse beam 20 protruding from the upper surface of the floor slab 28 into the maintenance space M. By supporting the server room floor 30A by these small beams 34, the rigidity of the server room floor 30A is secured. Further, by installing the small beam 34 on the reverse beam 20, the height H of the maintenance space M is set to a predetermined height.

  Similarly to the server room floor 30A, the power room floor 40A is formed of, for example, a mesh floor panel that allows ventilation in the vertical direction. On the power supply room floor 40A, a standby power supply 42 such as an uninterruptible power supply (UPS) that supplies electricity to the electronic device 32 in the event of a power failure is installed.

  The air conditioner room floor 50A is provided with an air conditioner 52 for cooling (air conditioning) the server room 30 and the power supply room 40, piping (not shown) for supplying cooling water to the electronic device 32, and the like. As shown in FIG. 4, the air conditioner room floor 50 </ b> A is formed with a blower opening 54 for blowing cooling air from the air conditioner 52 to the maintenance space M along the reverse beam 20. As a result, the cooling air generated by the air conditioner 52 is sent to the server room 30 and the power supply room 40 through the maintenance space M.

  Here, as shown in FIGS. 2 and 3, the reverse beam 20 is formed with a plurality of openings (maintenance openings) 60 penetrating in the beam width direction (Y direction). The plurality of openings 60 are formed in a circular shape and are spaced from each other in the material axis direction of the reverse beam 20. An operator can enter and leave the maintenance space M through these openings 60. Moreover, each opening part 60 of the reverse beam 20 can be obstruct | occluded by cover materials, such as a vinyl curtain and a panel material which are not shown in figure.

  Next, an example of an air conditioning method (cooling method) for the server room 30 and the power supply room 40 will be described.

  As shown in FIG. 3, first, when the air conditioner 52 of the air conditioner room 50 is operated, cooling air is blown into the maintenance space M through the air blowing opening 54 as indicated by an arrow. The cooling air blown into the maintenance space M is guided between the adjacent reverse beams 20 to the maintenance space M under the floor of the server room 30 and the power supply room 40. At this time, part of the cooling air passes through the server room floor 30 </ b> A and the power supply room floor 40 </ b> A in the vertical direction and flows into the server room 30 and the power supply room 40. As a result, the server room 30 and the power supply room 40 are cooled, and as a result, the electronic device 32 and the standby power supply 42 are cooled.

  Next, the cooling air flowing into the server room 30 and the power supply room 40 flows to the air conditioner room 50 along the ceiling and is cooled by the air conditioner 52, as indicated by arrows, and then passes through the ventilation opening 54. The air is blown again into the maintenance space M. By circulating the cooling air in this way, the electronic device 32 in the server room 30 and the standby power supply 42 in the power supply room 40 are cooled.

  As shown in FIG. 2, the cross beams 22 are respectively installed in the boundary between the air conditioner room 50 and the server room 30 and in the boundary between the server room 30 and the power supply room 40 in plan view. The cross beam 22 is a forward beam protruding from the floor slab 28 to the lower floor, and does not protrude into the maintenance space M. Therefore, since the cross beam 22 does not hinder the flow of the cooling air, the cooling air easily flows along the reverse beam 20. Therefore, the cooling efficiency of the server room 30 and the power supply room 40 is improved.

  Next, functions and effects of this embodiment will be described.

  As shown in FIG. 3, a maintenance space M is formed under the floor of the air conditioner room 50, the server room 30, and the power supply room 40. By sending cooling air from the air conditioner room 50 to the server room 30 and the power supply room 40 through the maintenance space M, the electronic device 32 and the standby power supply 42 are cooled.

  Here, since the height H of the maintenance space M is set according to the amount of cooling air necessary for cooling the plurality of electronic devices 32 installed in the server room 30, it tends to be high. By installing the reverse beam 20 using the maintenance space M, the beam formation of the reverse beam 20 can be increased. Therefore, since the reverse beam 20 can be made long span, the floor area of the server room 30 can be increased.

  Further, by supporting the server room floor 30A by the plurality of small beams 34 installed on the adjacent reverse beam 20, the rigidity of the server room floor 30A can be increased. Furthermore, by installing the small beam 34 supporting the server room floor 30A on the reverse beam 20, the height H of the maintenance space M can be secured without increasing the weight. Thereby, the freedom degree of the equipment plan of the maintenance space M can be raised.

  In addition, when the floor slab 28 is supported by the forward beam, the beam shape protrudes from the floor slab 28 to the server room 30 on the lower floor. The beam shape protruding to the server room 30 on the floor is eliminated. Since the effective space of the server room 30 is increased by the elimination of the beam shape, the floor height of the installation floor of the server room 30 (the distance between the upper and lower floor slabs 28) is compared with the configuration in which the floor slab 28 is supported by forward beams. ) Can be kept low. That is, in this embodiment, the floor height of the installation floor of the server room 30 can be kept low while expanding the floor area of the server room 30.

  Furthermore, in this embodiment, by installing the air conditioner 52 in the air conditioner room 50, the height H of the maintenance space M is minimized as compared with the case where the air conditioner 52 is installed in the maintenance space M. be able to. Therefore, the floor height of the installation floor of the server room 30 can be further reduced.

  Here, when the reverse beam 20 is installed in the maintenance space M, the reverse beam 20 becomes an obstacle and it becomes difficult for an operator to enter and leave the maintenance space M. However, the reverse beam 20 of the present embodiment includes a plurality of openings. A portion 60 is formed. Since an operator can enter and leave the maintenance space M through these openings 60, maintenance of the electronic device 32, wiring, piping, and the like is facilitated.

  On the other hand, in this embodiment, as shown in FIG. 2, an air conditioner room 50 is provided for each server room 30 provided between adjacent reverse beams 20. Then, cooling air (white arrows) is blown from the air conditioner rooms 50 to the server room 30 and the power supply room 40 through the maintenance space M formed between the adjacent reverse beams 20. However, if the opening 60 is formed in the reverse beam 20 as described above, the cooling air may leak to the adjacent maintenance space M through the opening 60. In particular, as shown in FIG. 2, when the server room 30 being used and the server room 30 not being used (the electronic device 32 is not installed or not in operation) are adjacent to each other, as indicated by an arrow a. Furthermore, since the cooling air leaks from the maintenance space M under the floor of the server room 30 in use to the maintenance space M under the floor of the unused server room 30, there is a possibility that the cooling efficiency of the server room 30 in use is reduced. is there.

  As a countermeasure, in this embodiment, the opening 60 of the reverse beam 20 can be closed by a cover material (not shown). By closing the opening 60 of the reverse beam 20 with this cover material, it is possible to prevent the cooling air from leaking into the adjacent maintenance space M. Therefore, a decrease in the cooling efficiency of the server room 30 can be suppressed.

  Note that the reverse beam 20 may have a truss structure. However, when the reverse beam 20 has a truss structure, since a plurality of large openings extending between the upper and lower chord members are formed over the entire length of the reverse beam 20, it takes time to close the openings. On the other hand, in this embodiment, since the opening part 60 can be formed in the reverse beam 20 of a non-truss structure as needed, the trouble of the operation | work which obstruct | occludes the opening part 60 can be reduced.

  In the present embodiment, the power supply room 40 and the air conditioner room 50 are provided on both sides of the server room 30. A supply pipe for supplying cooling water to the electronic device 32 is installed in the air conditioner room 50 on the opposite side of the power supply room 40 across the server room 30. As a result, the influence of water leakage or the like of the supply pipe does not reach the standby power supply 42 in the power supply chamber 40. Therefore, the failure of the standby power supply 42 can be suppressed.

  Further, in the present embodiment, the jump beams 24 and 26 are jumped outward from the pillar 14, and the spaces of the power supply room 40 and the air conditioner room 50 are secured by the jump beams 24 and 26. Since the number is reduced, the number of seismic isolation devices 16 can be reduced and the seismic isolation pit can be made smaller.

  Next, a modification of the above embodiment will be described.

  In the said embodiment, although the example which formed the reverse beam 20 with the reinforced concrete was shown, it is not restricted to this. The reverse beam 20 may be a non-truss structure (non-truss reverse beam), and may be formed of, for example, a steel frame reinforced concrete, H-shaped steel, I-shaped steel, channel steel, or the like. Further, the shape, number, and arrangement of the openings 60 formed in the reverse beam 20 can be changed as appropriate.

  Moreover, although the cross beam 22 and the jump beam 24 are shown as forward beams in the above embodiment, the cross beam 22 and the jump beam 24 may be reverse beams. Further, when the cross beam 22 is a forward beam, as shown in FIG. 4, the cross beam 22 becomes an obstacle and it becomes difficult for the cooling air to flow from the server room 30 to the air conditioner room 50. There is a possibility that heat will accumulate. As a countermeasure, the cross beam 22 may be a flat beam as indicated by a two-dot chain line. Thereby, since the cooling air easily flows from the server room 30 to the air conditioner room 50, heat accumulated at the base of the cross beam 22 can be reduced. The flat beam can be formed of reinforced concrete or steel frame.

  In addition, as shown in FIG. 5, the floor slab 70 may be formed of a plurality of one-way slabs (one-way slabs) 72 and the cross beams 22 may be omitted. Specifically, a plurality of one-way slabs 72 are respectively installed on the adjacent reverse beam 20 and the adjacent jump beam 26, and the load of each one-way slab 72 is transmitted to the reverse beam 20 or the jump beam 26. It has come to be. Therefore, it is not necessary to support the one-way slab 72 by the cross beam 22. Therefore, the cross beam 22 can be omitted.

  From the viewpoint of seismic performance, it is desirable to connect the columns 14 by the cross beams 22. Further, in the modification shown in FIG. 5, the jump beam 26 is a reverse beam protruding upward from the floor slab 70.

  Moreover, in the said embodiment, although the example which put up the pillar 14 between the server room 30 and the power supply room 40 and between the server room 30 and the air-conditioner room 50 was shown, it is not restricted to this. For example, the effective space of the server room 30 can be expanded by moving the pillars 14 to the outer periphery of the structure 12.

  Next, as shown in FIG. 6, the end portions 34A of the small beams 34 adjacent in the material axis direction may be rigidly joined on the reverse beam 20 to form a continuous beam. In this case, since the rigidity of the small beam 34 is increased, the rigidity of the server room floor 30A can be increased. Therefore, the number of installed electronic devices 32 can be increased, and the seismic performance can be improved. In the modification shown in FIG. 6, the reverse beam 20 is formed of H-shaped steel, and the end 34 </ b> A of the small beam 34 is joined to the upper flange 20 </ b> A of the reverse beam 20.

  Further, in the modification shown in FIG. 6, the end portions 34 </ b> A of the small beam 34 are rigidly joined on the reverse beam 20, but this is not a limitation. For example, the end portion 34A of the small beam 34 may be rigidly joined to the side surface of the reverse beam 20, or the end portions 34A of the small beam 34 may be rigidly joined under the reverse beam 20. Further, for example, the end portions 34A of the small beams 34 may be bonded only to the upper flange 20A of the reverse beam 20 (pin bonding) without rigidly bonding the end portions 34A of the small beams 34. Furthermore, the small beam 34 is not limited to a shape steel such as an H-shaped steel, an I-shaped steel, or a channel steel, and may be formed of reinforced concrete, steel reinforced concrete, or the like. Furthermore, the small beam 34 may be provided as necessary, and can be omitted as appropriate.

  Next, in the said embodiment, although the example which sent the cooling air from the air-conditioner room 50 to the server room 30 and the power supply room 40 via the maintenance space M was shown, it is not restricted to this. It is only necessary that cooling air can be blown from the air conditioner room 50 to at least the server room 30 through the maintenance space M, and the power supply room 40 may be cooled by another air conditioner.

  Moreover, although the example which provided the power supply room 40 and the air conditioner room 50 in the both sides of the server room 30 was shown in the said embodiment, it does not restrict to this. The power supply room 40 and the air conditioner room 50 may be provided on one side of the server room 30, or the power supply room 40 may be omitted, and the spare power supply device 42 and the like may be installed in the air conditioner room 50.

  Furthermore, although the server room 30 has been described as an example of the electronic device room in the above embodiment, the present invention is not limited to this. In the electronic device room, not only a server but also various electronic devices having a heat generating part can be installed. Furthermore, the said embodiment is applicable not only to the server room 30, but a cream room etc., for example.

  As mentioned above, although one embodiment of the present invention was described, the present invention is not limited to such an embodiment, and one embodiment and various modifications may be used in combination as appropriate, and the gist of the present invention will be described. Of course, various embodiments can be implemented without departing from the scope.

10 Double floor structure 20 Reverse beam 28 Floor slab 30A Server room floor (electronic equipment room floor)
32 Electronic equipment 34 Beams 50A Air conditioner room floor 52 Air conditioner 54 Blower opening 60 Opening 70 Floor slab F Double floor M Maintenance space (underfloor space)

Claims (5)

Floor slabs,
A double floor disposed above the floor slab and forming an underfloor space with the floor slab;
And Gyakuhari protrudes from the floor slab to the underfloor space to support the raised floor, and the openings through the beam width direction are formed to support the said floor slab,
With double floor structure. The double floor is capable of ventilating in the vertical direction and has an electronic equipment room floor part in which electronic equipment is installed, and an air conditioner room floor part in which an air conditioner is installed,
The air conditioning room floor is formed with a blower opening through which the cooling air can be blown from the air conditioner to the space under the floor along the reverse beam.
The double floor structure according to claim 1. The opening can be closed by a cover material,
The double floor structure according to claim 2. A plurality of the reverse beams are provided at intervals in the beam width direction,
In the adjacent reverse beam, a small beam supporting the double floor is erected,
The double floor structure according to any one of claims 1 to 3. The beam is installed on the reverse beam;
The double floor structure according to claim 4.

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