JP5683642B2 - Tsunami evacuation building - Google Patents

Description

  The present invention relates to a tsunami evacuation structure that provides a safe evacuation site against a tsunami that strikes upon the occurrence of an earthquake.

  When a tsunami warning is issued after an earthquake, it is essential to evacuate to a high place away from the coast as soon as possible. Previously, existing public facilities and high-rise buildings were designated as evacuation sites, and they were evacuated there when a tsunami warning was issued. However, if a huge tsunami that swallows the rooftop of a building, such as the tsunami of the 2011 off the Pacific coast of Tohoku Earthquake (the Great East Japan Earthquake) that occurred in March 2011, the safety of existing evacuation sites is not perfect. . In addition, if the evacuation site is far away and the evacuation is not in time before the tsunami arrives, the evacuation will be delayed and swallowed by the tsunami. Furthermore, in the case of an elderly person or a disabled person, there are circumstances that it takes time to evacuate or it is difficult to evacuate by oneself.

  Therefore, apart from existing public facilities and high-rise buildings, efforts are being made mainly by local governments to install new safe evacuation buildings to protect themselves from tsunamis. Various types of such tsunami evacuation buildings have been proposed so far. For example, in Patent Documents 1 to 5 described later, a plurality of support columns standing on the ground, an evacuation stage provided on the upper part of these support columns, and a staircase or a slope connecting the ground and the evacuation stage A tsunami evacuation structure provided with elevating means such as is described.

  The tsunami evacuation structure proposed in these patent documents has a basic structure of a support column, an evacuation stage, and lifting means, and evacuates from the ground to the evacuation stage on the top floor through the lifting means (stairs, slopes, etc.). Therefore, a safe place is secured against the tsunami attack.

JP 2008-14016 A JP 2006-83549 A JP 2006-177138 A JP 2006-112087 A Utility Model Registration No. 3169231

  More people can evacuate by expanding the area of the evacuation stage of the tsunami evacuation building. However, the installation of tsunami evacuation buildings may be limited by the land area and shape. There is no problem if a large land can be secured in the surrounding area, but depending on the land, a tsunami evacuation structure may be required to be installed on a limited area and in a limited shape. In such a case, after considering the circumstances of the land, how to secure an evacuation space for a large number of evacuees with a limited area and shape becomes a problem.

  An object of the present invention is to make it possible to easily construct a tsunami evacuation structure suitable for a land while securing a wide evacuation space even when the area and shape of the land are limited.

  A tsunami evacuation building according to the present invention comprises a plurality of pillars erected on the ground, an evacuation stage supported by these pillars, and an elevating means connecting the ground and the evacuation stage. It is a building for evacuation, and a dredge unit is composed of a support column and an evacuation stage. A plurality of eaves units are provided, and the evacuation stage that constitutes one eaves unit is formed in a polygonal shape in plan view, and is supported by the support at the apex of the polygonal shape. Adjacent dredge units are connected by one side of the polygon of each evacuation stage. The lifting / lowering means is composed of a slope using a water-permeable floor material. This slope is provided with safety fences on both sides, and spirals with a predetermined gradient on the outside of the column so as to surround the outer periphery of the multiple connected fence units from the ground to the evacuation stage on the top floor. Provided.

  If it does in this way, a saddle unit can be expanded in arbitrary directions by connecting with one side of the polygon of an evacuation stage. For this reason, even when there are restrictions on the area and shape of the land, by freely combining dredging units, it is possible to easily construct a tsunami evacuation structure according to the land, and the degree of freedom of construction is expanded. . Even when the number of people to be evacuated is large, a large evacuation space can be secured by connecting the number of cocoon units according to the number of people.

  In addition, since the slope is provided so as to surround the outer periphery of a plurality of connected fence units, the refugee can move around the fence unit as many times as when a slope is provided around the single fence unit. However, it is not necessary to go around repeatedly, and the evacuation stage on the top floor can be reached with a small number of turns. Furthermore, since the slope floor material allows water to pass therethrough, resistance to waves is reduced when a tsunami strikes, and the risk of being swept away by the tsunami is reduced.

  In the present invention, it is preferable that the floor material of the evacuation stage and the floor material of the slope are each formed of a grating-like grating material.

In the present invention, the slope gradient is preferably 1/8 or less and 1/12 or more .

  In the present invention, as the elevating means, in addition to the slope, a staircase having a steeper slope than the slope may be provided inside the column.

  In the present invention, it is preferable that the slope is connected to the stair landing at least at one place before reaching the evacuation stage on the top floor so that the slope can enter the stairs.

  In the present invention, the evacuation stage is preferably formed in a boat-shaped hexagonal shape in which two opposite sides are shorter than the other sides in plan view. Further, the evacuation stage may be formed in a boat-shaped octagon in which two opposing sides are shorter than the other sides in plan view.

  In this case, it is preferable that the evacuation stage is supported by the support so that the two short sides facing each other are orthogonal to the tsunami attack direction.

  According to the present invention, it is possible to easily construct a tsunami evacuation structure suitable for a land while securing a wide evacuation space even when the area and shape of the land are limited.

It is the top view and front view of the building for tsunami evacuation which concern on 1st Embodiment. It is the top view and front view of the building for tsunami evacuation which concern on 2nd Embodiment. It is the top view and front view of the building for tsunami evacuation which concern on 3rd Embodiment. It is the top view and front view of the building for tsunami evacuation which concern on 4th Embodiment. It is a schematic diagram which shows the example of installation of the building for tsunami evacuation. It is a schematic diagram of the scissor unit which concerns on other embodiment. It is a schematic diagram of the scissor unit which concerns on other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same reference numerals are given to the same or corresponding parts.

  FIG. 1 shows the first embodiment, which is an example in which two hook units are connected. 1A is a plan view, and FIG. 1B is a front view. The tsunami evacuation building 1 includes a plurality of columns P1 to P10 erected on the ground G, evacuation stages 12 and 22 supported on top of these columns, and the ground G and the evacuation stages 12 and 22. Slopes 13 and 23 and stairs 15 and 25 are provided as lifting and lowering means for connecting them.

  As shown in FIG. 1A, the eaves unit 100 is configured by the columns P1 to P3, P8 to P10 and the evacuation stage 12, and the eaves unit 200 is configured by the columns P3 to P8 and the evacuation stage 22.

  The evacuation stage 12 constituting the anchor unit 100 is formed in a boat-shaped hexagon in which two opposing sides are shorter than the other sides in plan view, and the pillars P1 to P3 and P8 to P10 are formed at the apexes of the hexagon. It is supported by. The evacuation stage 22 constituting the dredger unit 200 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P3 to P8 at the apex of the hexagon. Then, these adjacent saddle units 100 and 200 are connected by one side (indicated by a broken line) of the hexagons of the respective evacuation stages 12 and 22.

  The pillars P1 to P10 are made of a steel frame, and are fixed to the ground by, for example, a pile foundation up to a bedrock. The steel aggregate is finished to cope with salt damage (corrosion) caused by sea breeze. Each support P1 to P10 is connected by a beam F (FIG. 1B) installed in the horizontal direction.

  As shown in FIG. 1B, the tsunami evacuation building 1 is divided into a first floor to a fifth floor. Evacuation stages 12 and 22 are provided on the fifth floor of the top floor. Each evacuation stage 12 and 22 has a space for accommodating about 50 evacuees Y. The floor material which comprises the evacuation stages 12 and 22 is formed from the grating-like grating (grating) material with water permeability. The grating material is made of iron, for example. A safety fence M is provided around the evacuation stages 12 and 22. The intermediate floors from the second floor to the fourth floor are not provided with the evacuation stages 12 and 22 and have an atrium structure.

  The slopes 13 and 23 are provided with safety fences 14 and 24 on both sides, and surround the outer periphery of the connected fence units 100 and 200 from the ground G to the evacuation stages 12 and 22 on the top floor (fifth floor). Thus, it is provided on the outside of the pillars P1 to P10 in a spiral shape with a gentle gradient in the counterclockwise direction. The floor materials of these slopes 13 and 23 are also formed from a grid-like grating material having water permeability. The grating material is made of, for example, FRP (Fiber Reinforced Plastics).

If the slopes of the slopes 13 and 23 are steep, the evacuation stages 12 and 22 on the top floor can be reached in a short time, but the burden is heavy on those who are not physically strong or physically disabled. On the other hand, if the slope is too gentle, the burden on the evacuees will be reduced, but it will take time to reach the evacuation stages 12 and 22 on the top floor, which may hinder rapid evacuation. Therefore, the slopes of the slopes 13 and 23 are preferably 1/8 or less and preferably 1/12 or more , and most preferably 1/10 (the same applies to the slopes of the embodiments described later).

  The stairs 15 and 25 are provided inside the columns P1 to P10. The staircase 15 is provided on one end side of the saddle unit 100 and has a steeper slope than the slopes 13 and 23. The staircase 25 is provided on one end side (opposite side of the staircase 15) of the kite unit 200, and has a steeper slope than the slopes 13 and 23. The flooring of these steps 15 and 25 is also formed from a grid-like grating material with water permeability. The grating material is made of iron, for example. In addition, safety fences (reference numerals omitted) are provided on both sides of the stairs 15 and 25.

  As described above, the slopes 13 and 23 and the stairs 15 and 25 are provided as elevating means, so that persons without physical strength or disabled persons can use the slopes 13 and 23 without difficulty. You can head to the evacuation stages 12 and 22. On the other hand, a person with physical strength can go to the evacuation stages 12 and 22 on the top floor in a short time by using the stairs 15 and 25. Thereby, the evacuees can select an evacuation route suitable for them.

  In addition, the slopes 13 and 23 are connected to the landings of the stairs 15 and 25 at least at one place before reaching the evacuation stages 12 and 22 on the top floor. Since there are no safety fences 14 and 24 at this location, it is possible to enter the stairs 15 and 25 as they are from the slopes 13 and 23 (the same applies to each embodiment described later). For this reason, if a person evacuating through the slopes 13 and 23 having a gentle slope wants to reach the evacuation stages 12 and 22 on the top floor early, the staircases 15 and 25 having a steep slope at the landing place on the way. You can move on. Conversely, if a person evacuating through staircases 15 and 25 with steep slopes wants to reduce the burden, he / she can move to slopes 13 and 23 with a gentle slope at a landing on the way. In this way, the evacuation route can be switched on the way from the slope to the stairs or from the stairs to the slope.

  Further, when using the slopes 13 and 23, it is possible to reach the top floor in less than two rounds from the slope entrance A1 on the first floor to the slope exit A2 on the fifth floor in FIG. If there is only one kite unit, even if the slope is the same, it will be necessary to circulate around the kite unit several times until going to the top floor, which will be a stress for the evacuees. However, in this embodiment, since the slopes 13 and 23 are provided so as to surround the outer peripheries of the two saddle units 100 and 200, the number of times of going around to the top floor can be reduced, and the stress of the evacuees can be reduced. It is reduced.

  Further, in FIG. 1 (a), when there is a coast on the left side and a tsunami strikes from the left direction, the evacuation stages 12 and 22 have two short sides facing each other perpendicular to the tsunami strike direction. Thus, it is supported by the pillars P1 to P10. Therefore, the evacuation stages 12 and 22 have sides inclined with respect to the tsunami attack direction. For this reason, when the tsunami strikes, the tsunami can be released along the inclined side, so the tsunami force applied to the evacuation stages 12 and 22 is alleviated and the evacuation stages 12 and 22 are prevented from being washed away by the tsunami. be able to.

  Furthermore, since the floor materials of the evacuation stages 12 and 22, the floor materials of the slopes 13 and 23, and the floor materials of the stairs 15 and 25 are all formed from a permeable grid-like grating material, the tsunami evacuation The building 1 has water permeability as a whole. For this reason, the resistance with respect to the wave at the time of tsunami attack becomes very small, and this can reduce the risk that the whole building will be washed away by the tsunami.

  FIG. 2 shows a second embodiment, which is an example in which three hook units are connected. 2A is a plan view and FIG. 2B is a front view. The tsunami evacuation building 2 includes a plurality of pillars P1 to P13 erected on the ground G, evacuation stages 12, 22, and 32 supported on top of these pillars, and the ground G and the evacuation stages 12, 22 , 32 and slopes 13, 23, 33 and stairs 15, 25 serving as lifting means.

  As shown in FIG. 2A, the eaves unit 100 is configured by the columns P1 to P3, P8 to P10 and the evacuation stage 12, and the eaves unit 200 is configured by the columns P3 to P8 and the evacuation stage 22, and the columns P7 to P9. , P11 to P13 and the evacuation stage 32 constitute a saddle unit 300.

  The evacuation stage 12 constituting the anchor unit 100 is formed in a boat-shaped hexagon in plan view, and is supported by the pillars P1 to P3 and P8 to P10 at the apex of the hexagon. The evacuation stage 22 constituting the dredger unit 200 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P3 to P8 at the apex of the hexagon. The evacuation stage 32 constituting the anchor unit 300 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P7 to P9 and P11 to P13 at the apex of the hexagon. The adjacent saddle units 100 and 200, the adjacent saddle units 100 and 300, and the adjacent saddle units 200 and 300 are connected by one side of a hexagon of each evacuation stage 12, 22, 32 (shown by a broken line). ing.

  The struts P1 to P13 are made of steel frame material, and are fixed to the ground by, for example, a pile foundation up to the bedrock. The steel aggregate is finished to cope with salt damage (corrosion) caused by sea breeze. Each support P1 to P13 is connected by a beam F (FIG. 2B) installed in the horizontal direction.

  As shown in FIG. 2B, the tsunami evacuation building 2 is divided into a first floor to a fifth floor. Evacuation stages 12, 22 and 32 are provided on the fifth floor of the top floor. Each evacuation stage 12, 22 and 32 has a space for accommodating about 50 evacuees Y. The floor material which comprises the evacuation stages 12, 22, and 32 is formed from the grating-like grating material with water permeability. The grating material is made of iron, for example. A safety fence M is provided around the evacuation stages 12, 22, and 32. The intermediate floors from the second floor to the fourth floor are not provided with the evacuation stages 12, 22, and 32, and have an atrium structure.

  The slopes 13, 23, 33 are provided with safety fences 14, 24, 34 on both sides, and the fence unit 100 connected from the ground G to the evacuation stages 12, 22, 33 on the top floor (fifth floor). , 200 and 300 are provided spirally counterclockwise with a gentle gradient on the outside of the pillars P1 to P13 so as to surround the outer periphery of the pillars P1 to P13. The floor materials of these slopes 13, 23 and 33 are also formed from a lattice-like grating material having water permeability. The grating material is made of, for example, FRP.

  The stairs 15 and 25 are provided inside the columns P1 to P13. The staircase 15 is provided on one end side of the saddle unit 100 and has a steeper slope than the slopes 13, 23, and 33. The staircase 25 is provided on one end side (opposite side of the staircase 15) of the saddle unit 200, and has a steeper slope than the slopes 13, 23, and 33. The flooring of these steps 15 and 25 is also formed from a grid-like grating material with water permeability. The grating material is made of iron, for example. In addition, safety fences (reference numerals omitted) are provided on both sides of the stairs 15 and 25.

  In the case of the second embodiment as well, as in the first embodiment, the evacuees can select an evacuation route (slope or stairs) suitable for themselves and go to the top floor. The number of laps around is less. Further, when the tsunami strikes, the tsunami can be released along the inclined sides of the boat-shaped hexagonal evacuation stages 12, 22, and 32, and the evacuation stage can be prevented from being washed away by the tsunami. Furthermore, since the tsunami evacuation building 2 has water permeability as a whole, the resistance to the waves at the time of the tsunami strike is very small, and the risk of the entire building being washed away by the tsunami is reduced. Can do.

  FIG. 3 shows a third embodiment. This tsunami evacuation building 3 is a modification of FIG. 2 in which three dredging units are connected. 3A is a plan view, and FIG. 3B is a front view. In FIG. 3A, it is assumed that a tsunami strikes from the top of the figure. For this reason, the directions of the evacuation stages 12, 22, and 32 are 90 ° different from those in FIG. Also, the columns P1 to P13 in FIG. 2 are replaced with columns P1 to P11, P3 ', P8', and P9 '. The other parts are basically the same as those in FIG.

  FIG. 4 shows a fourth embodiment, which is an example in which four hook units are connected. 4A is a plan view, and FIG. 4B is a front view. The tsunami evacuation building 4 includes a plurality of pillars P1 to P18 erected on the ground G, evacuation stages 12, 22, 32, and 42 supported on the upper parts of the pillars, the ground G, and the evacuation stage 12 , 22, 32, 42, slopes 13, 23, 33, 43 and staircases 15, 25, 45 as lifting means.

  As shown in FIG. 4A, the eaves unit 100 is configured by the columns P1 to P3, P8 to P10 and the evacuation stage 12, and the eaves unit 200 is configured by the columns P4 to P6, P11, P12, P18 and the evacuation stage 22. Thus, the eaves unit 300 is configured by the columns P7 to P9, P11 to P13 and the evacuation stage 32, and the eaves unit 400 is configured by the columns P7, P13 to P17 and the evacuation stage 42.

  The evacuation stage 12 constituting the anchor unit 100 is formed in a boat-shaped hexagon in plan view, and is supported by the pillars P1 to P3 and P8 to P10 at the apex of the hexagon. The evacuation stage 22 constituting the dredger unit 200 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P4 to P6, P11, P12, and P18 at the apex of the hexagon. The evacuation stage 32 constituting the anchor unit 300 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P7 to P9 and P11 to P13 at the apex of the hexagon. The evacuation stage 42 constituting the anchor unit 400 is also formed in a boat-shaped hexagon in plan view, and is supported by the pillars P7, P13 to P17 at the apex of the hexagon. And the adjacent saddle units 100 and 300, the adjacent saddle units 200 and 300, and the adjacent saddle units 300 and 400 are hexagonal sides of the evacuation stages 12, 22, 32, and 42 (shown by broken lines). It is connected.

  The pillars P1 to P18 are made of a steel frame, and are fixed to the ground by, for example, a pile foundation up to a bedrock. The steel aggregate is finished to cope with salt damage (corrosion) caused by sea breeze. Each support P1 to P18 is connected by a beam F (FIG. 4B) installed in the horizontal direction.

  As shown in FIG. 4B, the tsunami evacuation building 4 is divided into a first floor to a fifth floor. Evacuation stages 12, 22, 32 and 42 are provided on the fifth floor of the top floor. Each evacuation stage 12, 22, 32, 42 has a space for accommodating about 50 evacuees Y. The floor material constituting the evacuation stages 12, 22, 32, and 42 is formed of a grid-like grating material having water permeability. The grating material is made of iron, for example. A safety fence M is provided around the evacuation stages 12, 22, 32, and 42. The intermediate floors from the second floor to the fourth floor are not provided with the evacuation stages 12, 22, 32, and 42, and have an atrium structure.

  The slopes 13, 23, 33, 43 are provided with safety fences 14, 24, 34, 44 on both sides, from the ground G to the evacuation stages 12, 22, 33, 43 on the top floor (fifth floor), In order to surround the outer peripheries of the connected saddle units 100, 200, 300, and 400, they are provided on the outside of the columns P1 to P18 in a spiral shape with a gentle gradient counterclockwise. The floor materials of these slopes 13, 23, 33 and 43 are also formed from a lattice-like grating material having water permeability. The grating material is made of, for example, FRP.

  The stairs 15, 25, 45 are provided inside the pillars P1 to P18. The staircase 15 is provided on one end side of the saddle unit 100, and has a steeper slope than the slopes 13, 23, 33, and 43. The staircase 25 is provided on one end side of the eaves unit 200 and has a steeper slope than the slopes 13, 23, 33, and 43. The staircase 45 is provided on one end side (opposite side of the staircases 15 and 25) of the saddle unit 400, and has a steeper slope than the slopes 13, 23, 33, and 43. The floor materials of these stairs 15, 25, 45 are also formed from a grid-like grating material with water permeability. The grating material is made of iron, for example. In addition, safety fences (reference numerals omitted) are provided on both sides of the stairs 15, 25, 45.

  In the case of the fourth embodiment as well, as in the first embodiment, the evacuees can select an evacuation route (slope or stairs) suitable for themselves and go to the top floor, and the dredge units 100, 200, 300 , The number of laps around 400 can be reduced. In addition, when a tsunami strikes, the tsunami can escape along the inclined sides of the boat-shaped hexagonal evacuation stages 12, 22, 32, and 42, and the evacuation stage can be prevented from being swept away by the tsunami. Furthermore, since the tsunami evacuation building 4 has water permeability as a whole, the resistance to waves at the time of the tsunami strike is very small, and the risk of the entire building being washed away by the tsunami is reduced. Can do.

  According to the tsunami evacuation buildings 1 to 4 of the first embodiment to the fourth embodiment described above, the adjacent dredging units are connected to one side of the hexagon of the evacuation stage, thereby extending in any direction. I can go. For this reason, for example, as shown in FIG. 5, there are buildings, fields, parks, grounds, etc. around the land where the tsunami evacuation building is installed, and the shape of the site is limited as indicated by a dashed line Z. Even in this case, by combining the dredging units 100, 200, and 300 as shown in the figure, it is possible to construct a tsunami evacuation building by making maximum use of this site.

  In this way, according to the present invention, even when the area and shape of the land are limited, it is possible to easily construct a tsunami evacuation structure according to the land by freely combining dredging units. , The degree of freedom of construction is expanded. Even when the number of people to be evacuated is large, a large evacuation space can be secured by connecting the number of cocoon units according to the number of people. FIGS. 6A to 6C show other examples of connection of the saddle units 100 to 500 (the illustration of the slope is omitted).

  The present invention is not limited to the above-described embodiments, and various other embodiments can be adopted. For example, in the above embodiments, the top floor is the fifth floor, but the top floor may be 6 floors or more or less than 5 floors. The floor height of the top floor evacuation stage can be set to an arbitrary height depending on the situation. Also, the floor area of the evacuation stage can be set to an arbitrary area according to the number of persons to be evacuated.

  In each of the above embodiments, the plane shape of the evacuation stage is a boat-shaped hexagon, but the plane shape of the evacuation stage may be a boat-shaped octagon as shown in FIG. FIGS. 7B to 7D show connection examples of the eaves units 100 to 400 using the octagonal evacuation stage (the illustration of the slope is omitted). Furthermore, the planar shape of the evacuation stage may be a polygon other than a hexagon or an octagon.

  In each of the above embodiments, the floor material of the evacuation stage and stairs is formed of a grating material made of iron, and the slope floor material is formed of a grating material of FRP. The floor material may be formed of a grating material made of FRP, and the slope floor material may be formed of a grating material made of iron. The material of the grating material may be a material other than iron or FRP. Furthermore, in order to give water permeability to floor materials, such as an evacuation stage and a slope, you may use not only a grating material but the floor board in which many through-holes were formed.

  In each of the above embodiments, the intermediate floor (2-4 floors) has an atrium structure without an evacuation stage. If necessary, an evacuation stage or safety fence is provided on all or part of the intermediate floor, and a slope is provided. The stairs may be connected to the evacuation stages on the top floor and the middle floor.

  Also, a bar that can be held by multiple people may be installed in the evacuation space of the evacuation stage on the top floor. Furthermore, anchoring means such as a belt, a rope, a chain, and a float may be attached to the bar to secure the body of the evacuees.

1, 2, 3, 4 Tsunami Evacuation Building 12, 22, 32, 42 Evacuation Stage 13, 23, 33, 43 Slope 15, 25, 45 Staircase 100, 200, 300, 400 櫓 Unit G Ground P1-P18, P3 ', P8', P9 'strut

Claims (8)

In a tsunami evacuation structure comprising a plurality of pillars erected on the ground, an evacuation stage supported by these pillars, and lifting means connecting the ground and the evacuation stage,
A saddle unit is constituted by the support column and the evacuation stage,
A plurality of the cage units are provided, and the evacuation stage constituting one cage unit is formed in a polygonal shape in plan view, and is supported by the column at the apex of the polygon,
Adjacent dredge units are connected by one side of the polygon of each evacuation stage,
The elevating means comprises a slope using a water-permeable floor material,
The slope is provided with safety fences on both sides, and spirals with a predetermined gradient on the outside of the column so as to surround the outer periphery of a plurality of connected fence units from the ground to the uppermost evacuation stage. A tsunami evacuation structure characterized by In the tsunami evacuation structure according to claim 1,
A tsunami evacuation structure, wherein the floor material of the evacuation stage and the floor material of the slope are each formed of a grating-like grating material. In the tsunami evacuation building according to claim 1 or 2,
The slope of the slope has a value of 1/8 or less and 1/12 or more . In the tsunami evacuation building according to any one of claims 1 to 3,
In addition to the slope, the elevating means further includes a staircase having a steeper slope than the slope,
A tsunami evacuation structure, wherein the staircase is provided inside the column. In the tsunami evacuation building according to claim 4,
The slope is connected to the stair landing in at least one place before reaching the top floor evacuation stage, and can enter the stairs from the slope. Building. In the tsunami evacuation building according to any one of claims 1 to 5,
A tsunami evacuation structure, wherein the evacuation stage is formed in a boat-shaped hexagon in which two opposing sides are shorter than the other sides in plan view. In the tsunami evacuation building according to any one of claims 1 to 5,
A tsunami evacuation structure, wherein the evacuation stage is formed in a boat-shaped octagon in which two opposing sides are shorter than the other sides in plan view. In the tsunami evacuation building according to claim 6 or 7,
The said evacuation stage is supported by the said support | pillar so that the two short sides which oppose may be orthogonal to the tsunami attack direction, The building for tsunami evacuation characterized by the above-mentioned.

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