JP2007120012A - Artificial ground for preventing flooding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide artificial ground for preventing flooding capable of letting a floating body float securely and quickly at flood time, preventing its erroneous operation when it rains other than the flood time, and being easily constructed even in a general residential area. <P>SOLUTION: The floating body 13A capable of elevating and lowering is arranged in a tank body 15, and a building 12 is built in an upper part of the floating body 13A. The floating body 13A is formed by surrounding it by a face material 17 such as concrete by using a foaming member 16 as a nucleus. A bottom part 15b of the tank body is provided with one deep part 18 or more at a position opposing to a bottom face 13c of the floating body, and the bottom part is an inclined face which becomes lower toward the deep part. A drain port 19 is formed in the deep part, and one water flowing passage 21 or more for letting water 22 flow toward the deep part in the tank body are formed between the floating body and the tank body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inundation-preventing artificial ground, and more particularly, to an inundation-preventing artificial ground that prevents underfloor inundation and on-floor inundation into a building during a flood.

  In recent years, it has been considered that precipitation per unit time is much higher than before due to global warming and environmental changes. In fact, there have been cases of flood damage caused by flooding in developed rivers. It can be seen. The direct damage to the general population due to flooding is underfloor flooding on the house and flooding on the floor. In particular, flooding on the floor is not only a damage to household goods but also a serious damage because it develops to the loss and collapse of houses.

  Patent Document 1 discloses a floating building in which a building is automatically lifted to a position higher than a water discharge surface when a flood occurs due to river flooding or the like. In the floating building disclosed in Patent Document 1, a building is constructed on the upper surface of a trolley type floating body, and when a flood or storm surge occurs, the trolley type floating body rises to lift the building, and the building is flooded. It is intended to prevent.

In the floating building described in Patent Document 1, an embodiment that can be said to be somewhat realistic from the viewpoint of protecting ordinary houses from inundation damage is that a pool-type foundation (a container with an upper opening) is connected to its upper opening surface and the ground ( GL) is installed in the ground so that it is almost in the same position, and a base boat type floating body is installed inside this pool type foundation so that it can be raised and lowered only in the vertical direction. This is an example in which a pontoon floating body is floated by water and the building is lifted from the water surface.
Utility Model Registration No. 3110611

  However, in the idea described in Patent Document 1, the trolley type floating body is formed of a steel plate in a sealed hollow shape, and is literally “a trolley”. It is actually very difficult to build such a steel hollow plate in an area where a general house is built, and the weight of the sealed hollow body itself is considerably heavy, so it is only necessary to lift the general house. In order to generate the buoyancy, there is a problem that a considerably large volume is required. By the way, when examining the annual rainfall conditions in Japan, depending on the season, there is a considerable amount of rainfall due to the influence of typhoons and rainy season fronts (for example, rainfall that is called torrential rain) . In such a case, the amount of rainwater flowing into and stored in the pool type foundation will be considerable in several days, and it is considered that the pontoon type floating body will surface even if no flooding occurs.

  In Patent Document 1, as a countermeasure against such a case, an embodiment is provided in which a deep portion is formed at the bottom of a pool-type foundation to form a rainwater reservoir, and the water accumulated in the rainwater reservoir is automatically drained to an external sewage outlet by a drainage pump. Is also described. However, if the power supply fails due to the typhoon or the developed low pressure, and the power transmission stops (power failure), the drain pump cannot be operated and it is not a flood. In addition, there is a problem that rainwater accumulates in the pool type foundation and the carrier type floating body rises.

  From the above, it is clear that with the technology that lifts the building and protects it from flooding damage, the floating body that supports the building can be easily built even in ordinary residential areas, and the floating body can rise reliably and quickly only during floods. The operational reliability that is minimally required and in particular does not cause the floating body to lift except during floods is extremely important for the implementation of this type of floating building.

  An object of the present invention is to solve such a conventional problem. The floating body is floated surely and quickly only at the time of flooding, and does not malfunction during rainfall other than during flooding, and is also constructed in a general residential area. It is to provide an artificial ground for preventing flooding.

  The present invention includes a floating body that can be lifted and lowered by buoyancy, guide means for restricting lateral movement of the floating body when the floating body is lifted, and a tank body that can store water and stores the floating body. This is an inundation-preventing artificial ground for building a building at the top, and is configured as follows in order to solve the above-mentioned technical problems. That is, the feature of the artificial ground for preventing inundation according to the present invention is that the floating body is formed by surrounding the foam member with a rigid face material, and the tank body is formed at the bottom portion facing the bottom surface of the floating body. Provided with at least one deep portion, the bottom portion of the tank body is formed with a downward inclined surface for flowing water from the outer peripheral side toward the deep portion, and a drain outlet is formed in the deep portion, Between the bottom surface and the bottom portion of the tank body, at least one flowing water channel is formed in which water that has entered the tank body flows from the outer peripheral portion of the floating body toward the deep portion of the tank body, and near the building When flooding occurs, the water that has started to enter the tank is stored in the tank without flowing out of the drainage port that cannot be drained, and the floating body is raised by its buoyancy to bring the building into the water surface. There is to lift more.

  The artificial ground for inundation prevention according to the present invention is composed of the above-described essential constituent elements, but it is established even when the constituent elements are specifically as follows. The specific component is that the bottom surface of the floating body is formed in a concave shape, and water that has started to be stored in the tank body enters the concave portion to become an air reservoir, and the air reservoir is a self-buoyancy of the floating body. In combination with this, a large buoyancy is generated in the floating body.

  In the artificial ground for preventing flooding according to the present invention, an opening is provided at a position facing the deep portion of the tank body on the bottom surface of the floating body, and the opening is formed through an air vent passage formed inside the floating body. When water that has started to enter the tank body flows toward the deep part of the tank body, the air in the water flow channel is returned to the atmosphere via the air vent passage. You may make it escape and ensure the quick flow of the water to the said deep part.

  Furthermore, in the artificial ground for preventing inundation according to the present invention, the foam member of the floating body is preferably formed of a foamed polystyrene block, and the face material of the float is disposed so as to surround the outer peripheral surface of the foamed polystyrene block. It is preferable to use a concrete covering member.

  According to the artificial ground for preventing flooding according to the present invention, the floating body is formed by surrounding the foamed member with a rigid face material, and the tank body is formed at the bottom portion facing the bottom surface of the floating body. The bottom of the tank body is formed by a downwardly inclined surface that allows water to flow from the outer peripheral side toward the deep part, and a drain outlet is formed in the deep part. The water that enters can be stored in a tank that can no longer be drained from the drain, and the floating body can be lifted by its buoyancy to lift the building from the water surface and protect the building from flooding. In such an inundation-preventing artificial ground, the floating body can be easily formed even in a general residential area and has a large buoyancy, and can be sufficiently lifted by the buoyancy in a general house. In addition, rainwater that has flowed into the tank will flow out of the drainage port at normal times other than during a flood, so that even if any amount of rain falls, the floating body will inadvertently float if it is below the wastewater treatment capacity on the downstream side There is nothing.

  Here, “flood” means that the state where the river is flooded or the ground is submerged continues, and the water level at that time causes inundation damage to the building. Such a flood generally occurs depending on whether an amount of water exceeding the wastewater treatment capacity on the downstream side flows in from the upstream side or the wastewater treatment on the downstream side becomes completely impossible. Therefore, even if a drainage port is formed at the bottom of the tank body and the drainage is normally drained from the drainage port, it means that effective drainage from the drainage port naturally does not occur in a flood situation. As a result, the tank begins to fill with water. Therefore, even if a drain outlet is formed at the bottom of the tank body, water accumulates in the tank body during a flood, and the floating body rises to prevent water from entering the building above it.

  Further, according to the artificial ground for preventing inundation according to the present invention, the bottom surface of the floating body is formed in a concave shape, and the water that has started to be stored in the tank body enters the concave portion to form an air reservoir, and the air reservoir is Since the buoyancy of the floating body is generated in combination with the self-buoyancy of the buoyant body, the buoyancy of the volume of the floating body can be increased, and even a relatively small floating body can lift the building above it.

  Furthermore, according to the artificial ground for preventing flooding according to the present invention, an opening is formed at a position facing the deep portion of the tank body on the bottom surface of the floating body, and this opening is formed from the draft of the floating body by an air vent passage formed inside the floating body. Since the water communicated with the atmosphere at the upper position, when the water that has started to enter the tank flows into the deep part of the tank body, the air in the flow channel can escape to the atmosphere through the air vent passage, and the deep part of the tank body. Water can flow in quickly. As a result, even if water suddenly flows into the tank body, the water can enter the bottom of the floating body without great resistance, and the floating body can begin to float almost simultaneously with the occurrence of the flood.

  In addition, in the artificial ground for preventing flooding of the present invention, when the foamed member constituting the floating body is formed of a foamed polystyrene block, the foamed polystyrene block is very lightweight, so the manufacturing work of the floating body is easy, and it does not take construction time. Construction costs can be reduced. In addition, by using a concrete covering member surrounding the outer peripheral surface of the polystyrene block as a face material, it is very easy to construct a building above the floating body, and such a floating body is manufactured in a yard or a factory. However, a very practical floating body can be provided, such as being very easy to transport to the construction site.

  Hereinafter, the preferred embodiment shown in the accompanying drawings of the artificial ground for preventing flooding according to the present invention will be further described. 1 is a longitudinal sectional view schematically showing an inundation preventing artificial ground according to an embodiment of the present invention, FIG. 2 is a top view schematically showing a floating body in the inundation preventing artificial ground of FIG. FIG. 3 is a perspective view of the floating body shown in FIG. 2. The artificial ground 10 for preventing flooding can store a floating body 13A that can be lifted and lowered by buoyancy, guide means 14 that regulates the lateral movement of the floating body 13A when the floating body 13A moves up and down, and can store water in an upper part that houses the floating body 13A. The building 12 is constructed above the floating body 13A.

  The floating body 13 </ b> A is formed by surrounding the foam member 16 as a core with a rigid face material 17. The face material 17 can be made of concrete, mortar, iron plate, or the like. However, the face material 17 covering the upper surface side of the foamed member 16, that is, the face material portion 17a on the upper surface 13a side of the floating body 13A, is formed of concrete because the base portion 12a of the building 12 is formed on the face material portion 17a. It is preferable to do. The upper surface 13a of the floating body 13A has an area larger than the floor area of the building 12 because the building 12 is built thereon, and the foaming member 16 which is the core of the floating body 13A can lift the building 12 and the floating body 13A itself. It is designed to have a volume enough to generate buoyancy.

  On the other hand, the tank body 15A is an open top enclosure that houses the floating body 13A and floats with the water flowing into the tank body 15A. The inner periphery and bottom of the tank body are made of concrete so that water can be stored. Is formed. The inner peripheral portion of the tank body 15A is formed by an inner wall 15a facing the outer surface 13b of the floating body 13A. Therefore, if the planar shape of the floating body 13A is a quadrangular shape as shown in FIG. 2, the planar shape in the tank body 15A is also a quadrangular shape. In FIG. 2, the illustration of the building 12 is omitted, and only the foundation portion 12 a of the building 12 is indicated by a two-dot chain line. The bottom portion 15b of the tank body 15A includes one deep portion 18, and the bottom portion 15b of the tank body 15A is formed by a downwardly inclined surface that allows water to flow from the inner wall 15a side toward the deep portion 18. A drainage port 19 is formed in the deep portion 18, and the drainage port 19 is connected to a sewerage facility or a river by a drainage pipe 20 so as to be drainable. As shown in FIG. 2, the deep portion 18 is formed at the central portion of the bottom portion 15b in the tank body 15A. However, the formation position of the deep portion 18 is not limited to the central portion of the bottom portion 15b. Two or more may be formed.

  In the inundation preventing artificial ground 10 shown in FIG. 1, since the bottom surface 13c of the floating body 13A is formed in a shape corresponding to the bottom portion 15b of the tank body 15A, the floating body 13A is in a non-floating state in the tank body 15A. Sometimes, the bottom surface 13c is in close contact with the bottom portion 15b of the tank body 15A. Therefore, when water flows into the tank body 15A, the inner wall 15a of the tank body 15A is interposed between the bottom 15b of the tank body 15A and the bottom surface 13c of the float body 13A in order to guide the water below the bottom surface 13c of the float body 13A. At least one flowing water channel 21 that flows from the side toward the deep portion 18 is formed. The flowing water channel 21 is a linear groove formed so as to extend from the inner wall 15a side of the tank body 15A to the deep part 18, and this groove part is formed in the bottom 15b of the tank body 15A as shown in FIG. Alternatively, it may be formed on the face material 17 constituting the bottom surface 13c of the floating body 13A so as to extend from the lower end of the outer surface 15b of the floating body 13A to the bottom surface portion directly above the deep portion 18 of the tank body 15A.

  When the floating body 13A disposed in the tank body 15A is lifted by the water accumulated in the tank body 15A, the guide means 14 for restricting the lateral movement of the floating body 13A includes a pipe 14a penetrating the floating body 13A in the vertical direction and this pipe. And a rod 14b slidably and tightly fitted to 14a. Both ends of the pipe 14 a are at the same position as the upper surface 13 a and the bottom surface 13 c of the floating body 13 A, that is, the surface of the face material 17, and are firmly connected to the face material 17. From the viewpoint of facilitating such connection, it is preferable to form the pipe 14a and the face material 17 from the same material. That is, when the face member 17a is made of concrete, the pipe 14a is also made of concrete, and when the face member 17a is made of an iron plate, the pipe 14a is also made of an iron plate.

  The rod 14b may be made of concrete or iron, and in either case, the lower end is fixed to the bottom 15b of the tank body 15A. When the tank body 15A is made of concrete, if the rod 14b is also made of concrete, the tank body 15A and the rod 14b can be integrally formed, and construction is easy. Such guide means 14 are provided at the four corners of a rectangular floating body 13A as seen in a plan view, as is apparent from FIG. This guide means 14 not only restricts the parallel movement in the horizontal direction when the floating body 13A floats in the tank body 15A, but also prevents the floating body 13A from tilting. “Preventing the inclination of the floating body 13A” means, for example, when the load distribution of the building 12 on the floating body 13 is biased to the left or right as seen in the longitudinal sectional view of FIG. It tends to sink into the water, meaning that this is prevented. That is, when buoyancy is generated in the floating body 13A, the floating body 13A moves only in the vertical direction. For this purpose, at least two guide means 14 are required at spaced positions, and preferably three or more guide means 14 are provided at mutually spaced positions.

  According to the artificial ground 10 for preventing inundation, when it is a daily rainfall that does not cause flooding of the river, the water that has flowed into the tank body 15A flows into the deep portion 18 through the flow channel 21 and drains from the drain port 19. Since the water flows out to the drainage facility on the downstream side through the pipe 20, the water does not accumulate in the tank body 15A, and therefore the floating body 13A does not rise. However, when the amount of water exceeding the drainage treatment capacity on the downstream side flows into the vicinity of the building 12 due to river flooding or torrential rain, so-called flooding, the water 22 flowing into the tank body 15A From 19 it becomes impossible to drain.

  In other words, the fact that flooding occurs near the building 12 means that an amount of water 22 exceeding the wastewater treatment capacity on the downstream side flows near the building 12. Therefore, even if the water 22 that has flowed into the tank body 15A tries to flow downstream from the drain port 19 through the drain pipe 20, it has already exceeded the wastewater treatment capacity on the downstream side, so that it becomes impossible to drain, and gradually the tank body. Accumulate in 15A.

  Thereafter, when the amount of water stored in the tank body 15A exceeds the draft of the floating body 13A, buoyancy is generated in the floating body 13A, and the building 12 rises in the tank body 15A as shown in FIG. At that time, the floating body 13A rises only in the vertical direction accurately because the rod 14b constituting the guide means 14 slides relatively in the pipe 14a attached to the floating body 13A. Even if the load applied to the floating body 13A is uneven, the floating body 13A does not tilt. Thereby, it becomes possible to prevent the inundation to the building 12 built on the floating body 13 </ b> A constituting the artificial ground 10.

  When the amount of water 22 flowing into the vicinity of the building 12 falls below the downstream drainage treatment capacity due to recovery of downstream wastewater treatment capacity, recovery of weather, or the end of flooding from rivers, etc., the wastewater in the tank body 15A is discharged. As the water level gradually decreases, the floating body 13A also begins to gradually drop, and finally the bottom surface 13c of the floating body 13A comes into contact with the bottom 15b of the tank body 15A to return to the original state.

  For the lifelines drawn into the building 12, that is, gas pipes, water pipes, sewage pipes, etc., the bellows hose having a sufficient margin corresponding to the maximum rising height of the building 12 is expected. The main pipe portion buried in the ground and the indoor side pipe are connected by a flexible hose such as a rubber hose. Moreover, also about an electric wire, it can respond to raising / lowering of a building by providing sufficient margin part in the lead-in wire | line part drawn in indoors from an electric pole. As a result, even if the building 12 is moved up and down by the floating body 13A, the lifeline does not fail.

  FIG. 5 is a longitudinal sectional view similar to FIG. 4 showing an artificial ground for preventing flooding according to another embodiment of the present invention. An inundation preventing artificial ground 10 shown in FIG. 5 includes a floating body 13B different from the floating body 13A of the inundation preventing artificial ground 10 shown in FIG. In this floating body 13B, the bottom surface 13c of the floating body 13B located above the deep portion 18 in the bottom portion 15b of the tank body 15A is formed in a hemispherical concave shape (hereinafter referred to as a concave portion 13d). This floating body 13B is configured in the same manner as the floating body 13A shown in FIG. 1 except that its bottom surface 13c is formed in a concave shape.

  As shown in FIG. 5, when the water that has started to be stored in the tank body 15A enters the recess 13d as shown in FIG. 5, the air remaining in the recess 13d is accumulated to form the air reservoir 23, and the air reservoir 23 becomes the floating body 13B. In combination with the self-buoyancy, a force for raising the floating body 13B is generated. Therefore, the heavy building 12 can be raised by using such a floating body 13B.

  FIG. 6 is a longitudinal sectional view similar to FIG. 1 showing an inundation preventing artificial ground according to another embodiment of the present invention. The inundation preventing artificial ground 10 shown in FIG. 6 includes a floating body 13C different from the floating body 13A of the inundation preventing artificial ground 10 shown in FIG. This floating body 13C has an opening 13e at a position facing the deep portion 18 of the tank body 15A, and the opening 13e is at an upper position than the draft of the floating body 13C through an air vent passage 13f formed inside the floating body 13C. Communicating with Thereby, when a relatively large amount of water begins to enter the tank body 15A and the water suddenly flows toward the deep portion 18 of the tank body 15A, the air in the flowing water channel 21 is returned to the atmosphere via the air vent passage 13f. The escape and the rapid flow of water into the deep part 18 can be ensured. The floating body 13C is configured in the same manner as the floating body 13A shown in FIG. 1 except that the floating body 13C includes an opening 13e and an air vent passage 13f.

  FIG. 7 is a plan view similar to FIG. 2 showing a floating body 13D of an artificial ground for preventing flooding according to another embodiment of the present invention. The floating body 13D shown in FIG. 7 is provided with an opening region 13g penetrating the floating body 13D in the vertical direction at the center when viewed in plan. Since the floating body 13D only needs to be able to lift the building 12 built on the top by buoyancy, the volume corresponding to the weight of the building 12 is increased by increasing the vertical dimension of the floating body 13C or increasing the area. If it is ensured and buoyancy is obtained, this floating body 13D can also be implemented. When such a floating body 13D is used, for example, a flexible hose (not shown) such as a bellows hose connected to the indoor sewage pipe is connected to the underground sewage main pipe portion through the opening area 13g of the floating body 13D. be able to. This floating body 13D is also configured in the same manner as the floating body 13A shown in FIG. 1 except that it includes an opening area 13g.

  In the tank body 15A in the embodiment shown in FIG. 1, one deep portion 18 is formed at a position facing the bottom surface 13c of the floating body 13D, and a drain port 19 is formed in the deep portion 18. However, when the floating body 13D shown in FIG. 7 is used, a tank body 15B different from the tank body 15A shown in FIG. 1 is used. That is, since the floating body 13D shown in FIG. 7 has a rectangular ring shape when seen in a plan view, the deep portion 18 is formed immediately below each piece constituting the floating body 13D. In FIG. 7, four drainage ports 19 are indicated by dotted lines in the bottom portion 15b of the tank body 15B, and the formation position of these drainage ports 19 is the deep portion 18 of the bottom portion 15c in the tank body 15B.

  FIG. 8 is a partial vertical cross-sectional view showing a tank body 15C of an artificial ground for preventing flooding according to still another embodiment of the present invention. In the tank body 15C shown in FIG. 8, a recess 15c is formed in the inner wall 15a, and a water level sensor 24 is installed in the recess 15c. It is preferable that the installation height of the water level sensor 24 from the tank bottom 15b is lower than the draft of the floating bodies 13A, 13B, and 13C. The significance of installing the water level sensor 24 is as follows. If the drain port 19 at the bottom 15b of the tank body 15C or the drain pipe 20 connected thereto (see FIGS. 1, 4 to 6) is clogged with dust or the like and cannot be drained, flooding will occur. However, rainwater or the like accumulates in the tank body 15C, and the floating bodies 13A, 13B, and 13C are lifted.

  However, if the water level sensor 24 is provided below the draft position of the floating bodies 13A, 13B, and 13C, the water level sensor 24 accumulates water in the tank body 15C before buoyancy is generated in the floating bodies 13A, 13B, and 13C. Can be detected. The water level sensor 24 is electrically connected to an alarm indicator (not shown) installed in the building 12 by radio or wire. As a result, a person living in the building 12 can know that water has accumulated in the tank body 15C with an alarm indicator (alarm sound or alarm lamp), and can provide information on the surrounding weather conditions, river increase information, etc. Whether or not the water stored in the tank body 15C is normal can be determined with reference. And when it is thought that the water storage in the tank body 15C is not a normal situation, the water in the tank body 15B is immediately discharged using an electric pump (not shown) or the like, and the floating bodies 13A, 13B, 13C. It is possible to prevent unforeseen lift.

  Further, as shown in FIG. 8, a part or most of the upper end of the inner side wall of the upper open portion of the tank body 15C is formed as an inclined surface 15d that inclines downward so as to be chamfered, and is directly above, that is, the tank body 15C. By covering the upper edge of the peripheral edge with the grating 25, water flowing into the periphery of the building 12 can be quickly introduced into the tank body 15C.

As the foam member 16 in the floating bodies 13A, 13B, and 13C, a foamed polystyrene block made of a synthetic resin can be used. Since the buoyancy of the expanded polystyrene can lift 900 kg / m ³ , the tank body 15A, in which the floating bodies 13A, 13B, 13C having a volume capable of lifting a general house by buoyancy are built within the range of the site area. It is easy to store in 15B and 15C. However, the artificial ground 10 for preventing flooding according to the present invention is not limited to forming the foamed member 16 of the floating bodies 13A, 13B, and 13C with a foamed polystyrene block, and exhibits a large buoyancy and is large against a compressive load. Any other material can be used as long as the material has resistance.

  Further, as shown in FIG. 9, the floating bodies 13A, 13B, and 13C may be formed by dividing them into a plurality of independent blocks 130, which are connected to each other at the construction site and integrated. At that time, the face materials may not be formed on the surfaces of the blocks 130 which are in contact with each other at the time of assembly, and the face materials of the contact portions may be connected when the blocks 130 are connected to each other.

  That is, for example, if the face material 17 is made of concrete, the face members 17 are connected by the same concrete at the contact portion of each block 130, or if the face material 17 is made of an iron plate, the contact portion. The face materials 17 are connected by welding. Of course, face materials are also formed on the surfaces of the blocks 130 that come into contact with each other during assembly, and when these blocks 130 are connected to each other, they are connected using means such as joints (for example, bolting). Also good.

  According to the floating body 13E configured by connecting a plurality of independent blocks 130 in this way, the transportation of each block 130 becomes extremely easy. Therefore, each block 130 is formed in advance in a factory or a yard, and they are installed on the construction site. Thus, the construction of the floating body 13E becomes very easy, and the construction period and cost required for the construction of this kind of artificial ground for preventing flooding can be reduced.

  Further, in the artificial ground for preventing flooding according to the present invention, the periphery of the polystyrene block having excellent buoyancy performance and compressive strength capable of supporting buildings such as ordinary houses is covered with a rigid face material. Since the floating body is formed, it is very easy to handle the floating body when manufacturing the floating body or during subsequent transportation and construction.

  Furthermore, in order to protect the building from flood damage when building a new building, the ground is not limited to the inundation-preventing artificial ground of the present invention. It is possible to substantially raise the building by lifting it with a jack or the like and improving the ground below it to the artificial ground for preventing flooding according to the present invention.

1 is a longitudinal sectional view schematically showing an inundation preventing artificial ground according to an embodiment of the present invention. It is the top view which looked at the floating body accommodated in the tank body and this tank body cut | disconnected by 2-2 line | wire of FIG. It is a perspective view which shows the floating body in the artificial ground for inundation prevention of embodiment shown by FIG. It is the same longitudinal cross-sectional view as FIG. 1 which shows the state where the floating body rose by buoyancy and the building was lifted by the occurrence of flooding in the flooded artificial ground of the embodiment shown in FIG. It is a longitudinal cross-sectional view which shows schematically the artificial ground for inundation prevention which concerns on other embodiment of this invention. It is a longitudinal cross-sectional view which shows roughly the artificial ground for inundation prevention which concerns on other embodiment of this invention. It is a top view similar to FIG. 2 which shows roughly the floating body in the artificial ground for inundation prevention which concerns on other embodiment of this invention. It is a schematic longitudinal cross-sectional view which shows partially the tank in the artificial ground for inundation prevention which concerns on further another embodiment of this invention. It is a perspective view which shows roughly the floating body in the artificial ground for inundation prevention which concerns on another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Artificial ground for inundation prevention 12 Building 12a Foundation part 13A, 13B, 13C, 13D, 13E Floating body 13a Upper surface 13b Outer side surface 13c Bottom surface 13d Recessed part 13e Opening part 13f Air vent path 14 Guide means 14a Pipe 14b Rod 15A, 15B, 15C 15a Inner wall 15b Bottom 16 Foaming member 17 Face material 18 Deep 19 Discharge port 20 Drain pipe 21 Flow channel 22 Water 23 Air reservoir 24 Water level sensor

Claims (5)

A floating body that can be lifted and lowered by buoyancy; guide means that regulates lateral movement of the floating body when the floating body is lifted; and a tank body that is open and can store water to store the floating body. In the artificial ground for preventing flooding,
The floating body is formed by surrounding a foam member with a rigid face material,
The tank body includes at least one deep portion formed at a bottom portion facing the bottom surface of the floating body, and the bottom portion of the tank body is formed by a downwardly inclined surface that allows water to flow from the outer peripheral side toward the deep portion. A drain outlet is formed in the deep part,
Between the bottom surface of the floating body and the bottom portion of the tank body, at least one flowing water channel is formed in which water that has entered the tank body flows from the outer peripheral portion of the floating body toward the deep portion of the tank body. ,
When flooding occurs in the vicinity of the building, the water that has begun to enter the tank is stored in the tank without flowing out of the drainage port, which cannot be drained, and the floating body is raised by its buoyancy to increase the floating body. The artificial ground for preventing flooding, wherein the building is lifted from the water surface.   The bottom surface of the floating body is formed in a concave shape, and water that has started to be stored in the tank body enters the concave portion to form an air reservoir, and the air reservoir, coupled with the self-buoyancy of the floating body, exerts a large buoyancy on the floating body. The artificial ground for preventing flooding according to claim 1 to be generated. An opening is formed in the bottom surface of the floating body at a position facing the deep portion of the tank body, and the opening is located above the draft of the floating body through an air vent passage formed inside the floating body. Communicate with the atmosphere,
When the water that has started to enter the tank flows into the deep part of the tank, the air in the flow channel is released to the atmosphere through the air vent passage to ensure quick flow of water into the deep part. The artificial ground for flood prevention according to claim 1.   The artificial ground for preventing flooding according to any one of claims 1 to 3, wherein the foamed member of the floating body is a foamed polystyrene block. The artificial ground for flood prevention according to claim 4, wherein the face material of the floating body is a concrete covering member disposed so as to surround an outer peripheral surface of the polystyrene foam block.

Images