JP2013194488A - Flood damage prevention structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flood damage prevention structure which can be easily constructed at a low cost.SOLUTION: A flood damage prevention structure is used to prevent equipment 10 from being damaged by flood. The equipment 10 is covered by a canopy part 20 having high water-tightness, and an opening 21 is formed in a lower part of the canopy part 20. When a flood or tsunami occurs, an air reservoir is formed around the equipment 10 placed on an upper layer of an indoor 20A even if water enters the indoor 20A of the canopy part 20 through the opening 21 and the indoor 20A is submerged up to a lower layer thereof. Accordingly, a rise of a water level is suppressed and thus, the equipment 10 can be prevented from being submerged. Furthermore, the flood damage prevention structure can be easily constructed at a low cost, because all that is needed is only to mount the canopy part 20 over the existing equipment 10 afterward.

Description

  The present invention relates to a water damage prevention structure. More specifically, the present invention relates to a flood prevention structure that prevents equipment from flooding.

Conventionally, a large amount of water may enter a building due to flooding or tsunami. In the basement of the building, electrical equipment such as cubicles, generators, and storage batteries are often provided, and these electrical equipment cannot be reused when submerged, and it takes time to restore the function of the building.
In order to solve this problem, measures such as providing a large dyke and a seawall are taken (see Patent Document 1).

JP 2006-342653 A

However, in recent years, large floods and tsunamis have occurred, and even if the above-mentioned levee or tide embankment is provided, it may not be possible to prevent floods and tsunamis from entering urban areas.
Therefore, it is considered to move important equipment such as electrical equipment to the second floor or more above ground, but it is difficult to secure the location of the destination and it is difficult to realize it because it is expensive and secure There are also many.

  An object of the present invention is to provide a structure for preventing water damage that is easy to construct at low cost.

  The water damage prevention structure according to claim 1 is a water damage prevention structure for preventing water damage of a device (for example, an equipment device 10 described later), and the device is a highly watertight canopy portion (for example, a canopy portion described later). 20), and an opening (for example, an opening 21 described later) is formed in the lower part of the canopy.

According to the present invention, when a flood such as flood or tsunami occurs, water enters the inner space of the canopy through the opening, and even if it is submerged to the lower layer of this inner space, it is around the equipment located in the upper layer of the inner space. An air pocket is formed and the rise of the water level is suppressed. Therefore, it is possible to prevent the device from being flooded.
Moreover, since it is only necessary to attach the canopy part to the existing device later, the construction is easy and the cost is reduced.

  In addition, if the internal space is completely sealed, the external water pressure will be higher than the internal space pressure, so it is necessary to increase the rigidity of the canopy, and the structure is heavy and requires a lot of space. In addition, the cost is high. However, as in the present invention, at the time of flooding, water is actively introduced from the opening into the internal space, the volume of the air pool is compressed, and the compressed air is used to resist external water pressure. There is no need to increase the height of the canopy, making it easy to manufacture the canopy and reducing the cost.

  The water damage prevention structure according to claim 2 is a gas supply device (for example, a gas supply device 30 to be described later) that supplies gas (for example, air to be described later) to an internal space (for example, a room 20A to be described later) of the canopy portion. Is provided.

If water flows from the opening into the internal space of the canopy and the air pocket is compressed when the water is submerged, the water level in the internal space rises and the device may be submerged.
So, according to this invention, the gas supply apparatus which supplies gas to the internal space of a canopy part was provided. Therefore, by supplying gas to the internal space at a pressure equal to or higher than the compressed air pressure of the air reservoir by the gas supply device, the water level in the internal space can be lowered, so that the device can be reliably prevented from being flooded.

  According to the present invention, when a flood such as flood or tsunami occurs, water enters the inner space of the canopy through the opening, and even if it is submerged to the lower layer of this inner space, it is around the equipment located in the upper layer of the inner space. An air pocket is formed and the rise of the water level is suppressed. Therefore, it is possible to prevent the device from being flooded. Moreover, since it is only necessary to attach the canopy part to the existing device later, the construction is easy and the cost is reduced.

1 is a cross-sectional view of a building to which a water damage prevention structure according to an embodiment of the present invention is applied. It is sectional drawing of the canopy part which concerns on the said embodiment. It is a flowchart of operation | movement of the gas supply apparatus which concerns on the said embodiment. It is sectional drawing of the canopy part which concerns on the modification of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a building 1 to which a water damage prevention structure according to an embodiment of the present invention is applied.
The building 1 has an underground housing 2 up to the second basement floor, and existing equipment 10 that is, for example, a transformation facility is installed on the second basement floor.

Specifically, an equipment foundation 11 is formed on the floor 3 of the second basement floor, and the equipment 10 is installed on the equipment foundation 11 via the equipment mount 10A (see FIG. 2). ).
This equipment 10 is covered with a canopy portion 20 having high water tightness. The canopy portion 20 has a substantially box shape with an open bottom surface and is attached to the existing equipment 10 later. Let the interior space of the canopy part 20 be the room 20A.

FIG. 2 is a cross-sectional view of the canopy 20.
The lower end edge of the canopy 20 is in contact with the floor surface 3 and is fixed to the floor surface 3.
In addition, an opening 21 that communicates the room 20 </ b> A and the outdoors is formed in the lower part of the canopy 20. In addition to the opening 21, an opening (not shown) is formed at the same height as the opening 21, and piping, cables, and the like are routed through the opening (not shown).
Further, a gas supply device 30 that supplies high-pressure air as a gas according to the water level of the room 20A is installed in the room 20A of the canopy 20.

  In this building 1, when a flood such as flood or tsunami occurs, water flows into the basement floor and the room 20 </ b> A of the canopy 20 is flooded through the opening 21 as indicated by an arrow in FIG. 1. Then, although the equipment foundation 11 located in the lower layer of the room 20A is submerged, an air pocket is formed around the equipment 10 located in the upper layer of the room 20A. Therefore, even if the underground floor is completely submerged by flooding to the first floor level, the equipment 10 is in the air reservoir, so that the equipment 10 can be prevented from being flooded.

By the way, when submerged to the first floor level, according to Archimedes' principle, buoyancy equal to the weight of water excluding the volume of the air reservoir in the room 20A acts as a pulling force on the canopy 20. Therefore, the rigidity of the canopy portion 20 and the bonding strength between the canopy portion 20 and the floor surface 3 are ensured so as to withstand this buoyancy.
Further, when a door is provided as an entrance / exit in the canopy portion 20, the door is secured with water tightness so that water does not enter the room 20 </ b> A even if the room 20 </ b> A has a negative pressure with respect to the outside due to air accumulation.

  Further, for example, it is assumed that the equipment 10 is located 20 m below the ground, is flooded to the first floor level, and the underground floor is completely submerged. In this case, since the interior 20A of the canopy 20 is 3 atm., The volume of the air reservoir in the interior 20A becomes 1/3 of the normal due to Boyle's law, the water level in the interior 20A becomes high, and the equipment 10 is submerged. Resulting in. Thus, high-pressure air is supplied by the gas supply device 30, but the high-pressure air needs to be at least 3 atm in order to send the high-pressure air into the 3 atm air reservoir. In this way, the pressure of the high-pressure air to be supplied is set according to the assumed water depth of the equipment device 10.

  The gas supply device 30 includes a plurality of cylinders 31 filled with high-pressure air, a supply pipe 32 extending from the cylinder 31, a plurality of nozzles 33 provided on the front end side of the supply pipe 32, and a supply pipe 32. An on-off valve 34 provided in the middle, a sensor 35 for detecting the water level in the room 20A, and a control panel 36 for controlling the on-off valve 34 based on the water level detected by the sensor 35 are provided. The sensor 35 and the control panel 36 are operated even during a power failure by an uninterruptible power supply (UPS).

Hereinafter, the height of the upper end of the equipment foundation 11 is defined as an upper limit water level B, and a predetermined height lower than the upper limit water level B is defined as a lower limit water level A.
The sensor 35 detects the lower limit water level A and the upper limit water level B, and has three rod-shaped contacts 35A, 35B, and 35C that extend downward.
The lower end of the contact point 35C extends to a position lower than the lower limit water level A. The lower end of the contact point 35A extends to the height position of the lower limit water level A. The lower end of the contact point 35B extends to the height position of the upper limit water level B.

  When the water level reaches the lower limit water level A, the contact point 35A and the contact point 35C are energized through water, and the sensor 35 detects the lower limit water level A. On the other hand, when the water level reaches the upper limit water level B, the contact 35B and the contact 35C are energized through the water, and the sensor 35 detects the upper limit water level B.

  The control panel 36 opens and closes the open / close valve 34 based on the lower limit water level A or the upper limit water level B detected by the sensor 35. The control panel 36 has a built-in timer and a stop button.

Hereinafter, operation | movement of the gas supply apparatus 30 is demonstrated, referring the flowchart of FIG.
In step S1, the sensor 35 detects the water level in the room 20A.
In step S2, it is determined whether or not the water level has risen to the lower limit water level A. When this determination is Yes, the process proceeds to step S3, and when it is No, the process returns to step S1 and the detection of the water level is continued.
In step S3, since the water level has reached the lower limit water level A, the inundation warning of stage 1 is issued to the room 20A, the central monitoring control panel of the building 1, and the like.

In step S4, the sensor 35 detects the water level in the room 20A.
In step S5, it is determined whether or not the water level has risen to the upper limit water level B. When this determination is Yes, the process proceeds to step S6, and when it is No, the process returns to step S4 and the detection of the water level is continued.
In step S6, since the water level has reached the upper limit water level B, an inundation warning for stage 2 is issued to the room 20A, and an evacuation recommendation is made from the room 20A.

In step S7, the operation of the timer of the control panel 36 is started.
In step S8, it is determined whether or not a stop operation has been performed by pressing the stop button on the control panel 36. If this determination is Yes, the process moves to step S9, the stage 2 flood alarm is canceled, and the process returns to step S1. On the other hand, if No, the process moves to step S10.
In step S10, it is determined whether or not a predetermined time has elapsed since the timer started. If this determination is Yes, the process moves to step S11, and if it is No, the process returns to step S8.

In step S11, the on-off valve 34 is opened, and high pressure air is supplied from the cylinder 31 to the room 20A. Thereby, the water level in the room 20A is lowered.
In step S12, it is determined whether or not the water level has dropped to the lower limit water level A. If this determination is Yes, the process moves to step S13, and if it is No, step S12 is repeated.
In step S13, the on-off valve 34 is closed, the supply of high-pressure air from the cylinder 31 is stopped, and the process returns to step S4.

According to this embodiment, there are the following effects.
(1) In the event of floods such as floods and tsunamis, even if water enters the room 20A of the canopy 20 through the opening 21 and the water is submerged up to the equipment base 11 below the room 20A, the equipment located above the room 20A. An air pocket is formed around the device 10 to suppress an increase in water level. Therefore, it is possible to prevent the facility device 10 from being flooded.
Moreover, since it is only necessary to attach the canopy part 20 to the existing equipment 10 later, the construction is easy and the cost is reduced.

  In addition, when the water is immersed, water is actively introduced into the room 20A from the opening 21 to compress the volume of the air reservoir, and the compressed air reservoir counteracts external water pressure, so that the rigidity of the canopy portion 20 is increased so much. This is not necessary, and the canopy 20 can be manufactured easily and at a low cost.

  (2) A gas supply device 30 for supplying high-pressure air to the room 20A is provided. Therefore, since the water level of the indoor 20A can be lowered by supplying high-pressure air to the indoor 20A with a pressure equal to or higher than the compressed air pressure of the air reservoir by the gas supply device 30, it is ensured that the equipment 10 is submerged. Can be prevented.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the present embodiment, air is supplied by the gas supply device. However, the present invention is not limited to this, and a stable gas having low flammability and toxicity such as nitrogen may be used instead of air.
In the present embodiment, the water level is detected by energizing the contacts 35A to 35C. However, the present invention is not limited to this, and the water level may be detected by a float switch.

Moreover, although the cylinder filled with high pressure air was used in this embodiment, it is not restricted to this. In other words, when it is assumed that the water depth of the equipment at the time of flooding does not become too deep, it is not necessary to supply so high-pressure air. It may be used in combination with a compressor to be supplied.
In the present embodiment, the lower end edge of the canopy part 20 is provided in contact with the floor surface 3. However, the present invention is not limited thereto, and the lower end edge of the canopy part 20 may be provided separately from the floor surface 3.

In the present embodiment, the gas supply device 30 is provided in the room 20A. However, the present invention is not limited thereto, and the gas supply device may be installed on a ground portion where there is no risk of flooding.
Moreover, in this embodiment, although the one gas supply apparatus 30 was provided with respect to the one canopy part 20, it is not restricted to this, One gas supply is made by branching the supply piping of the gas supply apparatus 30. The apparatus 30 may supply air to the plurality of canopy units 20.

  As shown in FIG. 4, a cylinder 22 extending from the opening 21 toward the upper side of the room 20 </ b> A may be provided, and the contacts 35 </ b> A to 35 </ b> C of the sensor 35 may be disposed inside the cylinder 22. In this way, the water level in the room 20A can be detected without allowing water to enter the room 20A.

DESCRIPTION OF SYMBOLS 1 ... Building 2 ... Underground frame 3 ... Floor surface 10 ... Equipment 10A ... Equipment mount 11 ... Equipment foundation 20 ... Canopy 20A ... Indoor (internal space)
DESCRIPTION OF SYMBOLS 21 ... Opening 30 ... Gas supply device 31 ... Cylinder 32 ... Supply piping 33 ... Nozzle 34 ... On-off valve 35 ... Sensor 35A, 35B, 35C ... Contact 36 ... Control panel A ... Lower limit water level B ... Upper limit water level

Claims (2)

A water damage prevention structure that prevents equipment from being damaged by water,
The device is covered from above with a highly watertight canopy,
A water damage prevention structure, wherein an opening is formed in a lower part of the canopy portion.   The water damage prevention structure according to claim 1, further comprising a gas supply device that supplies gas to the internal space of the canopy portion.

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