JP6473474B2 - Evacuation structure - Google Patents

Description

  The present invention relates to an evacuation structure used as a refuge in the event of a tsunami or flood.

Conventionally, as this type of evacuation structure, a tsunami evacuation tower used as an evacuation center when a tsunami occurs is known (see Patent Document 1).
This tsunami evacuation tower is a steel structure building, and has a floor surface corresponding to the second floor and a floor surface corresponding to the third floor, and between the ground and the second floor and between the second floor and the third floor. There is a staircase with a handrail in between. The floor corresponding to the second floor is the expected tsunami height. On each floor, there is an entrance / exit that is connected to the staircase with handrails, and a safety fence is provided on all four sides except the entrance / exit. Furthermore, a hoist such as a winch for raising and lowering people and materials is provided on the third floor, so that people and materials on the ground can be lifted directly to the third floor. Thereby, even a disabled person or an elderly person can be evacuated easily.

JP 2006-83549 A

In such a conventional tsunami evacuation tower, the evacuees evacuate to a height of at least about 5 m (second floor). For this reason, evacuation of disabled and elderly people took time and effort, and it was impossible to evacuate quickly and reliably. In other words, even when using stairs, slopes, or hoisting machines, several people are required to assist the disabled or elderly people to evacuate to a height of 5 meters. Therefore, if the ratio of healthy persons to disabled persons and elderly persons among the evacuees is not sufficiently high, it is impossible to evacuate quickly and reliably. This also applies to evacuation to hills, etc. Even if evacuation routes, stairs, handrails, etc. are provided, there is no guarantee that actual evacuation will be carried out smoothly.
On the other hand, this type of evacuation facility is used only as an evacuation center when a tsunami occurs (emergency). Therefore, although it is a fate of this type of facility, it is a useless facility (building) that cannot be expected to have any economic effect except in an emergency (emergency), and it is also a cause for the spread of it to not progress.

  An object of the present invention is to provide a structure for evacuation that is capable of evacuating quickly and reliably in an emergency and secondly having an economic effect in normal times.

Evacuation for the structure of the present invention is used as an outdoor facility of a particular application at the time of normal, there is provided a refuge for the structure to be used as a shelter in case of emergency, including the tsunami, the outdoor facility land and refuge a base portion which also serves as a floor, a seat portion for supporting the base portion, built into the base unit, Ri by the infestation was tsunami, a float unit for floating the base portion with the base portion, a plurality of guiding the floating foundation portion and guide column, and a foundation pits are formed to pay lower of the pedestal, the pedestal has a height of 1.0～1.5M, the bottom of the pit, the lower ground Features.

According to this structure, when a tsunami strikes, the base part used as an evacuation site will surface by a float part. For this reason, the base part is not submerged simply by moving up and down according to the height of the tsunami, and safety of evacuees on the base part can be achieved. In addition, since the rising of the base portion is guided by a plurality of guide columns, the lifted base portion is not carried on a tsunami, and in this respect as well, the refugees on the base portion can be safe. In addition, since the base portion rises against the tsunami, the base portion at the time of evacuation may be provided at a low position. More preferably, it may be a height that does not cause a wave in the early stage of the tsunami that hits. For this reason, the height of the base part from the ground can be suppressed sufficiently low, and evacuation onto the base part is easy, and evacuation can be performed quickly and reliably. The base portion may be a “筏” -like one that is directly supported by the float portion, or the base portion may be supported by a pedestal, and the float portion may be incorporated into the pedestal.
Further, in an emergency including a tsunami, it can sufficiently function as an evacuation site and can evacuate quickly and reliably, while being used as a facility for a specific purpose in normal times. Accordingly, it is possible to provide an evacuation site that functions as a facility where economic effects can be expected. In addition, normal use is not only expected to have an economic effect, but the use of the facility itself is part of the evacuation drill. Furthermore, the daily management of the facility also suppresses aging due to salt damage. Note that the term “outdoor facility” is a concept that includes a simple roof such as an awning or a rain shield. “Land” is used as a general term for a board for people who use outdoor facilities to work.
Furthermore, the base part which becomes a floor of an evacuation site is stably supported by the pedestal part. For this reason, even if a float part is a partial float aggregate, a base part can be stably levitated. Therefore, the evacuees can be accused without feeling stress. In addition, it is preferable to equip the pedestal part with a life jacket for evacuees in the form of storage under the floor.

  In this case, the outdoor facility is preferably an outdoor event facility, an outdoor sports facility, an outdoor play facility, or an outdoor parking facility.

  According to this configuration, since the facility used in the immediate vicinity becomes an emergency (emergency) evacuation site, it can be easily evacuated mentally, avoiding the so-called “wolf boy” situation be able to. As an outdoor type event facility, an event stage having a stage floor that is one step higher than the ground is suitable. As an outdoor-type sports facility, a tennis court having a court (land) with an appropriate area and a fence is suitable. As an outdoor type play facility, a plaza or the like with play equipment is suitable. As an outdoor parking facility, a self-propelled parking lot or the like up to two stories is suitable.

  In this case, it is preferable that the base portion has a plurality of guide engaging portions that are slidably engaged with the plurality of guide columns.

  According to this configuration, when ascending due to a tsunami, the base portion can be stably raised and lowered without tilting, and a safe and secure evacuation site can be obtained.

  In these cases, it is preferable to further include a wave return portion projecting outward from either one of the base portion and the pedestal portion.

  According to this configuration, it is possible to prevent the base portion from being washed by a tsunami at the start of ascent and at the time of ascent, and a safe and safe evacuation site can be obtained.

  Moreover, it is preferable to further include a plurality of slopes provided between the base portion and the ground.

  According to this configuration, since the base portion is at a low position with respect to the ground, it is possible to evacuate the handicapped and the elderly very easily as compared with the conventional evacuation site. In particular, evacuation by wheelchair can be easily performed.

  Furthermore, it is preferable to further include a fence provided at the peripheral edge of the base portion.

  According to this configuration, a larger number of evacuees can be accommodated than the area of the base portion, and a safe and secure evacuation site can be provided.

  In this case, it is preferable that the fence has a plurality of partial fences configured to be able to appear and retract with respect to the base portion.

  According to this configuration, the fence does not get in the way when the facility is used during normal times. In an emergency, a fence can be easily and quickly built by an evacuee.

  On the other hand, the float part preferably has a plurality of partial floats connected to each other.

  According to this structure, construction can be easily performed even if the float portion is large. Moreover, even if a part of the float is damaged due to rubble caused by the tsunami, the entire buoyancy is not drastically reduced. In addition, although it is preferable to provide an underfloor storage for equipment, appliances, food, etc. on the base portion, the underfloor storage may be made of FRP (fiber reinforced plastic) and may be part of the partial float.

  Moreover, it is preferable to further provide a horizontal member that connects the plurality of guide columns at the upper end.

  According to this configuration, the plurality of guide columns can be firmly installed by the horizontal member so as to sufficiently withstand the horizontal wave force of the tsunami.

It is an evacuation structure which concerns on 1st Embodiment, Comprising: It is a top view of the evacuation structure which serves as an event stage. It is the elevation seen from the front of the structure for evacuation which also serves as an event stage. It is the elevation seen from the side of the structure for evacuation which also serves as an event stage. It is the elevation view seen from the front of the evacuation structure which surfaced. It is the elevation view seen from the side of the evacuation structure which surfaced. It is an evacuation structure which concerns on 2nd Embodiment, Comprising: It is a top view of the evacuation structure which serves as a tennis court. It is the elevation seen from the front of the structure for evacuation which also serves as a tennis court.

  Hereinafter, an evacuation structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. This evacuation structure is a structure that serves as an evacuation site against a tsunami, but is normally used as an outdoor facility (event stage, tennis court, etc.) for a specific purpose. Therefore, although the structure is an outdoor facility that also serves as an evacuation site, since the function as the evacuation site is technically significant, either the event stage of the first embodiment or the tennis court of the second embodiment will be described below. Will also be explained as “evacuation structure”.

[First Embodiment]
In the first embodiment, an evacuation structure is applied to an outdoor event stage.
1 is a plan view of the evacuation structure, a front view (front elevation), FIG. 2 is a front view (front elevation) of the evacuation structure, and FIG. 3 is a side view (side elevation) of the evacuation structure. Is a plan view). As shown in these drawings, the evacuation structure 10 (event stage IS) includes a base part 11 serving as a floor (land) of the event stage IS and a floor of an evacuation place, and a pedestal part 12 that supports the base part 11. A float part 13 for levitating the base part 11 and the pedestal part 12 against the tsunami, and a plurality of (four in the embodiment) guide struts 14 for guiding the ascent of the base part 11 and the pedestal part 12; I have. The base part 11, the pedestal part 12, and the float part 13 constitute a so-called stage S that is the main body of the event stage IS.

  The evacuation structure 10 includes a concrete foundation 16 (solid foundation), four stage steps 17 provided on the foundation 16 so as to face the stage S from three sides, and a back provided behind the stage S. A wall 18 and a terrace 19 provided between the back wall 18 and the stage S are provided. Each stage step 17 has a staircase 21 and a slope 22 arranged side by side between the ground G and the stage S (base part 11). The staircase 21 and the slope 22 are formed with a gentle slope in consideration of raising and lowering of disabled people and elderly people in wheelchairs. The back wall 18 has a back panel 23 on the surface on the stage S side, and is constructed of a steel frame structure or a reinforced concrete structure. The terrace 19 is provided with a power supply facility such as a regular power supply (not shown).

  The base portion 11 is made of a weather-resistant floor material and is supported by the pedestal portion 12. The pedestal portion 12 is configured by assembling steel materials, aluminum materials, and the like, and has a height (thickness) of 1.0 to 1.5 m. The height of the pedestal portion 12 is the height of the general stage S, and is set to such an extent that the base portion 11 does not suffer a wave (tsunami) until the stage S starts to rise due to the tsunami. Has been. The lower part of the pedestal 12 (stage S) is housed in a shallow pit 16a formed on the foundation 16, and the horizontal wave force received from the tsunami before the stage S starts to rise due to the tsunami is guided by the guide column. It can be received on the foundation 16 instead of 14.

  The float portion 13 is a portion having a buoyancy that floats the stage S (the base portion 11 and the pedestal portion 12), and is configured by a plurality of partial floats 25 incorporated in the pedestal portion 12. Although not shown in the drawing, the pedestal portion 12 is framed by a steel material or the like and has a plurality of float spaces partitioned by an outer shell or a partition plate. The partial floats 25 are accommodated in the plurality of float spaces.

  Each partial float 25 is made of a resin independent foam such as polystyrene foam or urethane, an injection type resin independent foam, or an air tank made of FRP (fiber reinforced plastic). Thereby, even if the partial float 25 touches water, it does not absorb water and maintains its buoyancy. And the float part 13 of embodiment is designed so that the base | substrate part 11 may float to the position sufficiently higher than the water surface of a tsunami (refer FIG. 4 and FIG. 5). Note that a damping member such as a damping rubber that absorbs seismic motion prior to the tsunami may be incorporated in the stage S.

  As shown in FIGS. 1 to 3, the stage S is provided with a wave return 27 (wave return part) so as to border the four circumferences of the base part 11. The wave return 27 is configured by, for example, a plurality of metal or resin wave return pieces 28 having a “L” cross section in the circumferential direction. Each wave return piece 28 is fixed to the pedestal portion 12 at the portion of the other rib piece, with one rib piece protruding outward from the base portion 11. The incoming tsunami collides with the kicking of the stage S and jumps upward, but the tsunami that jumps up is pushed back by the wave return 27 (one rib piece). Thereby, it can prevent that the upper surface of the base | substrate part 11 is washed with a tsunami.

  In addition, the other rib piece of each wave return piece 28 may be extended to the lower part of the stage S to constitute a damaged panel of the stage S. Further, a solar panel may be incorporated in the return 27 to provide a nightlight power source for night evacuation. Further, each wave return piece 28 may have a structure that protrudes outward in conjunction with a lifting operation of the partial fence 32 described later.

  Similarly, a fence 31 configured to be movable in and out with respect to the base portion 11 is embedded in the four peripheral portions of the stage S. The fence 31 is composed of a plurality of partial fences 32 that extend along the four peripheral edges of the stage S, and the partial fences 32 are configured to be able to protrude and retract individually with respect to the base 11 (see FIGS. 4 and 5). ). The evacuees who have evacuated in preparation for the tsunami are separated by hand to project (draw out) all the partial fences 32 to form the fence 31 and prepare for the rise of the stage S. Needless to say, the partial fence 32 is fixed in a state where it is pulled up by a click or the like provided at the lower end.

  As shown in FIG. 1, the stage S incorporates four storages 34 (underfloor storages) with lids and drainage tanks 35 with manholes. Each storage 34 and the drain tank 35 are made of, for example, PRP (fiber reinforced plastic), and also function as the partial float 25 described above. In the embodiment, two lids are provided for one storage 34, but the size and number of the storages 34 and the number and form of the lids are determined by the storage items. And it is preferable that the lid | cover of the storage 34 and the manhole of the drainage tank 35 are a thing with high watertightness.

  The first storage 34A accommodates, for example, a small generator, a battery, a lighting fixture, a flashlight, a communication device, a portable radio, and the like. Although details will be described later, a horizontal member 41 is stretched over the upper ends of the four guide columns 14, and illumination for the stage S is attached to the horizontal member 41 (not shown). The small generator functions as a power source for this lighting instead of (switching to) the regular power source in the event of a disaster. The second storage 34B stores emergency food, drinking water, a cassette stove, and the like. Thereby, the evacuation structure 10 has a function as an evacuation site after the tsunami leaves or regardless of the occurrence of the tsunami.

  The third storage 34C stores simple assembly toilets, toilet paper, pharmaceuticals, clothes, other daily necessities, and the like. The simple assembly toilet is of a type that is installed in a manhole, and is installed on a drainage tank 35 that is assembled and the manhole is removed. A helmet, a life jacket, a life rope, a life boat, a smoke cylinder, and the like are housed in the fourth storage 34D. Helmets and life jackets are worn by evacuees in preparation for the rise of stage S. Life ropes and life boats are used to rescue victims who are late to escape and are swept away by the tsunami. The rising stage S has a constant height from the water surface and is suitable for this type of rescue operation.

On the other hand, four guide engaging portions 37 are provided at the four corners of the stage S so as to be supported by the pedestal portion 12 and slidably engage with the respective guide columns 14 in the vertical direction. Each guide engaging portion 37 is provided with a slide ring 38 surrounding the guide column 14, and the slide ring 38 is slidably engaged with the guide column 14 with a slight gap. The slide ring 38 is composed of a vibration isolation member made of vibration isolation rubber or the like. As a result, the four slide rings 38 serving as contact points with the respective guide columns 14 not only function as slide members, but also absorb the rolls of the stage S caused by earthquake motion or tsunami. Further, even if the stage S (the pedestal portion 12) is tilted when the stage S is lifted, the slide ring 38 formed of the vibration isolating member suppresses “squeaking” between the guide column 14 and the slide ring 38.

  As shown in FIGS. 1 to 5, the four guide columns 14 extend upward through the four corners of the stage S. Each guide column 14 is preferably composed of, for example, a steel pile or a ready-made reinforced concrete pile used in the pile land industry, and the embodiment is composed of a steel pipe pile (a kind of steel pile). The lower part of each guide column 14 penetrates the foundation 16 and is deeply driven into the ground G. The depth at which the guide column 14 is driven into the ground G is designed in consideration of the horizontal wave force of the tsunami and the strength of the ground G, and the height of the guide column 14 from the ground G is the largest possible tsunami. It is designed in consideration of the height. That is, the height of the guide column 14 from the ground G exceeds the assumed maximum tsunami height.

  As shown in FIGS. 1 and 2, a horizontal member 41 is provided at the upper ends of the four guide columns 14 to connect them in a rectangular shape. The horizontal member 41 is made of steel or the like, and reinforces and positions the four guide struts 14 in the form of beams and girders. The four guide struts 14 are fixed to the base 16 and the ground G at the lower part, and the upper ends are connected by the horizontal member 41, thereby resisting the horizontal wave force of the tsunami received by itself and the stage S. (See FIG. 4 and FIG. 5).

  In addition, the horizontal member 41 functions as a stopper that regulates the floating upper end position of the stage S, and prevents the stage S from separating (outflowing) from the guide column 14. Although not shown, the stage member S is attached to the horizontal member 41. On the stage S, a simple roof for sun protection and rain protection may be provided.

  Here, the evacuation procedure in the evacuation structure 10 will be briefly described. When the tsunami warning is issued, evacuation to the evacuation structure 10 of the residents in the vicinity is started according to the evacuation guidance manual. In the initial stage of evacuation, work is started appropriately by dividing it into those who pull out the fence 31, those who prepare life jackets, and those who assist evacuation such as elderly people. An operator who pulls out the fence 31 first establishes the fence 31 by pulling out the partial fence 32 except for the portion where the four stage steps 17 face.

  The operator who prepares the life jacket takes out the helmet and the life jacket from the fourth storage 34D, and gives them to the refugee to urge them to wear them. The worker who assists the evacuation waits for the refugee at the base of the stage step 17, and uses the stage step 17 to sequentially carry the refugee onto the stage S. Then, the four partial fences 32 that the stage step 17 faces are pulled out after confirming the tsunami attack. Thereafter, the evacuees leave the stage S to emerge, but they always keep in touch with the government office by radio.

  As described above, according to the evacuation structure 10 of the first embodiment, when the tsunami strikes, the base portion 11 and the pedestal portion 12, that is, the entire stage S, rise from the float portion 13. Thereby, the evacuees on stage S can be evacuated appropriately with respect to a tsunami. Further, since the rising of the stage S is guided by the four guide columns 14, the stage S is not swept away by the tsunami, and the safety of the evacuees can be achieved. Furthermore, since the stage S (base 11) is at a relatively low position from the ground G, the evacuee can easily evacuate onto the stage S. In particular, even if the refugee is a disabled person or an elderly person in a wheelchair, evacuation onto the stage S can be performed quickly and reliably by using the slope 22.

  On the other hand, the evacuation structure 10 of the first embodiment in a normal state is used as the event stage IS. For this reason, this evacuation structure 10 is not a mere evacuation facility, but a facility where the owner of the facility can be expected to have an economic effect. Therefore, the significance of facility construction is high, and it helps to spread the target municipalities. It should be noted that the stage S may be in a simple form such as “筏” in which the float portion 13 also serves as the pedestal portion 12 in order to reduce costs.

[Second Embodiment]
Next, the evacuation structure 50 according to the second embodiment will be described with reference to FIGS. 6 and 7. In the second embodiment, the evacuation structure 50 is applied to an outdoor tennis court TC.
As shown in FIG. 6 and FIG. 7, in this evacuation structure 50 (tennis court TC), tennis including front and rear back coats BC and left and right side courts SC in addition to the original main court MC (drawn portion). The entire surface (land) of the coat TC becomes the floor of the evacuation site.

  Similarly to the first embodiment, the evacuation structure 50 of the second embodiment includes a base 51 that also serves as a board surface of the tennis court TC, a pedestal 52 that supports the base 51, and a base 51 against the tsunami. And a float part 53 for levitating the pedestal part 52, and a plurality of (14 in the embodiment) guide columns 54 for guiding the levitation of the base part 51 and the pedestal part 52. The base 51, the pedestal 52, and the float 53 constitute a floating coat C. Further, the evacuation structure 50 is provided with a high coat fence 56 erected on the four peripheral edges of the floating coat C.

  The levitation coat C is supported by a concrete foundation 58 (solid foundation) as in the first embodiment, and the foundation 58 has ten connecting passages 59 for ascending from the ground G to the levitation coat C. Is provided. Each connecting passage 59 is composed of a staircase 61 and a slope 62 arranged side by side. Ten connecting passages 59 face the front and rear back coats BC, and face the left and right side coats SC. Three places are arranged. Also in this case, the staircase 61 and the slope 62 are formed in a gentle slope in consideration of raising and lowering of a disabled person or an elderly person in a wheelchair.

  The coat fence 56 is configured by connecting ten open / close fence portions 64 facing the ten communication passages 59 and other fixed fence portions 65. Each open / close fence part 64 is configured to be openable and closable in the form of an external opening (double door opening), and 2 to 3 open / close fence parts 64 out of 10 open / close fence parts 64 are used as a normal doorway. .

  As in the first embodiment, the base 51 is made of a coating material and is supported by the pedestal 52. The pedestal portion 52 is configured by assembling steel, aluminum, or the like, and has a height (thickness) of 1.0 to 1.5 m. Further, the lower part of the pedestal 52 (floating coat C) is housed in a shallow pit 58 a formed on the foundation 58. Also in this case, the float portion 53 is configured by a plurality of partial floats 67 incorporated in the pedestal portion 52.

  The pedestal portion 52 includes a pedestal portion main body 71 that directly supports the base portion 51, and 14 strut engaging portions 72 (guides) that project outward from the pedestal portion main body 71 and engage with the 14 guide struts 54. Engaging portion). Each strut engaging portion 72 includes a slide ring 73 that surrounds the guide strut 54 and a ring holding portion 74 that holds the slide ring 73. The slide ring 73 is slidably engaged with the guide column 54 with a slight gap, and is composed of a vibration isolation member made of vibration isolation rubber or the like, as in the first embodiment. Also in this case, it is preferable that the pedestal 52 is provided with a wave return (not shown).

  As shown in FIGS. 6 and 7, the fourteen guide columns 54 are arranged so as to face the front and rear back coats BC, and to each of the four left and right side coats SC. Yes. Each guide support | pillar 54 is comprised with the steel pipe pile (a kind of steel pile) similarly to 1st Embodiment. Also in this case, the height of the guide column 54 from the ground G exceeds the assumed maximum tsunami height. Further, a horizontal member 76 is provided at the upper ends of the 14 guide columns 54 to connect them in a rectangular shape.

  The horizontal member 76 functions as a stopper that regulates the floating upper end position of the floating coat C, and prevents the floating coat C from separating (outflowing) from the guide column 54. Although not shown in the drawing, a nighter illumination or the like is attached to the horizontal member 76. Also in this case, it is preferable to provide the floating coat C with an underfloor type or storage type storage.

  As described above, according to the evacuation structure 50 of the second embodiment, when a tsunami strikes, the base portion 51 and the pedestal portion 52, that is, the entire floating coat C, are moved by the 14 guide posts 54 from the float portion 53. Guided and surfaced. Thereby, the refugee on the levitation coat C can be appropriately evacuated to the tsunami, and the safety of the refugee can be achieved. Moreover, the evacuees can easily evacuate to the levitating coat C at a low position by using the slope 62.

  On the other hand, the evacuation structure 50 of the second embodiment at normal times is used as a tennis court TC. For this reason, this evacuation structure 50 is not a mere evacuation facility, but a facility where the owner of the facility can be expected to have an economic effect. Therefore, the significance of facility construction is high, and it helps to spread the target municipalities.

  In these embodiments, the evacuation structures 10 and 50 also serve as the event stage IS and the tennis court TC, respectively. As other outdoor facilities, various event facilities, various sports facilities, various play facilities, and various types The structure which serves as a parking facility etc. may be sufficient.

  However, the evacuation structures 10 and 50 may be structures dedicated to measures against tsunamis (plus floods and high waves). For example, in the evacuation structure 10, the back wall 18 and the terrace 19 are provided, and the fence 31 is configured with a fixed portion and an entrance / exit portion, and the entrance / exit portion is opened in an emergency. With such a configuration, an economic effect cannot be expected, but evacuation can be performed quickly and reliably.

  DESCRIPTION OF SYMBOLS 10 ... Evacuation structure, 11 ... Base part, 12 ... Base part, 13 ... Float part, 14 ... Guide support | pillar, 17 ... Stage step, 22 ... Slope, 25 ... Partial float, 27 ... Wave return, 28 ... Wave return One piece, 31 ... fence, 32 ... partial fence, 37 ... guide engaging part, 41 ... horizontal member, 50 ... evacuation structure, 51 ... base part, 52 ... pedestal part, 53 ... float part, 54 ... guide post 56 ... Coating fence, 59 ... Communication passageway, 62 ... Slope, 67 ... Partial float, 71 ... Pedestal body, 72 ... Pole engaging part, 76 ... Horizontal material, G ... Ground, IS ... Event stage, S ... Stage, TC ... Tennis court, C ... Levitation court

Claims (9)

An evacuation structure that is used as an outdoor facility for specific purposes during normal times and as an evacuation site in an emergency including a tsunami,
A base that doubles as a land of the outdoor facility and a floor of the evacuation site;
A pedestal for supporting the base,
Incorporated in the base portion, Ri by the tsunami invasion, a float unit for floating the base portion together with the base portion,
A plurality of guide columns for guiding the floating of the base part;
A foundation on which a pit for receiving the lower portion of the pedestal portion is formed, and
The pedestal portion has a height of 1.0 to 1.5 m,
The evacuation structure is characterized in that the bottom of the pit is lower than the ground.   The evacuation structure according to claim 1, wherein the outdoor facility is any one of an outdoor event facility, an outdoor sports facility, an outdoor play facility, and an outdoor parking facility. 3. The evacuation structure according to claim 1 , wherein the pedestal portion includes a plurality of guide engaging portions that are slidably engaged with the plurality of guide columns. 4. The evacuation structure according to any one of claims 1 to 3 , further comprising a wave return portion projecting outward from one of the base portion and the pedestal portion. The evacuation structure according to any one of claims 1 to 4 , further comprising a plurality of slopes provided between the base portion and the ground. The evacuation structure according to any one of claims 1 to 5 , further comprising a fence provided at a peripheral portion of the base portion. The evacuation structure according to claim 6 , wherein the fence includes a plurality of partial fences configured to be able to appear and retract with respect to the base portion. The evacuation structure according to any one of claims 1 to 7 , wherein the float part has a plurality of partial floats connected to each other. The evacuation structure according to any one of claims 1 to 8 , further comprising a horizontal member that connects the plurality of guide columns at an upper end portion.

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