Flood prevention system and flood prevention method

Abstract

The flood control system (1) includes a sheet storage groove (2) that is continuously installed around the land or building to be protected, a waterproof sheet (3) whose lower end is fixed to the sheet storage groove (2) and that continuously covers the land or building, and a number of posts (4) that are installed near the sheet storage groove (2) and support the waterproof sheet (3). The waterproof sheet (3) can be fixed to the sheet storage groove (2) and can also be pulled up and fixed to the tops of the multiple posts (4). When the waterproof sheet (3) is pulled up and fixed to the tops of the multiple posts (4), it bends at the posts (4) that are located at the corners of the land or building in a plan view, and a continuous waterproof wall (6) is formed by the waterproof sheet (3). This covers the parts of the protected object that need protection, making it easy to prevent flooding.

Description

[Technical field]

[0001] The present invention relates to a flood prevention system and a flood prevention method. [Background technology]

[0002] In recent years, emphasis has been placed on a sense of openness in detached houses, and an increasing number of exteriors are being built without fences, hedges, concrete blocks, etc., as is common in Europe and the United States.

[0003] Meanwhile, in recent years, the risk of flooding has increased due to an increase in sudden heavy rains, so it has become known to surround buildings with concrete blocks and cover the entrances and exits with retractable waterproof doors.

[0004] However, waterproofing using concrete blocks is not preferred because it feels oppressive.

[0005] For example, as disclosed in Patent Document 1, an upwardly extending levee is known which has the function of responding to flooding by high-level seawater or river water by injecting compressed air or helium gas from an injection device into a cylindrical body of an expandable and contractible cylindrical sealed membrane material stored in a hangar, causing the cylinder to expand and extend upward to a desired height (for example, 3 m or more), and which has the function of protecting the levee from collisions with floating objects, etc. by being equipped with an outer wall made of FRP or metal material.

[0006] Also, as disclosed in Patent Document 2, a disaster prevention gate structure is known which includes a groove arranged to cross the entrance of a facility, a sealed bag-shaped gate body made of a flexible material and watertightly fixed to the groove and to a side wall connected to the groove by fixing members, a fluid supply device which supplies fluid into the gate body, and a multi-hole pipe member which is attached inside the gate body and supplies the fluid supplied from the fluid supply device evenly within the gate body, and which blocks the flow of water seeping in from the entrance of a facility. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Registered Utility Model No. 3229308 [Patent Document 2] Patent No. 3834543 Summary of the Invention [Problem to be solved by the invention]

[0008] However, the upward extension type levee in Patent Document 1 uses exterior walls made of FRP lumber or metal materials, which makes the structure complex and expensive.

[0009] Furthermore, the disaster prevention gate structure of Patent Document 2 can only prevent flooding of the gate portion, and cannot prevent flooding of the entire building.

[0010] For example, there is also a demand to enclose entire blocks of land that include multiple houses rather than just a single home, to enclose parks and other areas as evacuation sites, and to enclose farmland to prevent the outbreak of crop diseases due to flooding or inundation.

[0011] The present invention has been made in consideration of the above points, and an object of the present invention is to easily prevent water from entering by covering a portion of an object to be protected that needs protection. [Means for solving the problem]

[0012] In order to achieve the above object, in this invention, when in use, the waterproof sheet is folded and stored in the groove, and is pulled up and hung on the support.

[0013] Specifically, in the first invention, A waterproof sheet fixing portion that is continuously installed around the land or building to be protected; A waterproof sheet having a lower end fixed to the waterproof sheet fixing portion and continuously covering the periphery of the land or building; A plurality of posts are provided in the vicinity of the waterproof sheet fixing portion and support the waterproof sheet, The waterproof sheet can be fixed to the waterproof sheet fixing portion and can be pulled up and fixed to the upper part of the plurality of supports, When the waterproof sheet is pulled up and fixed to the top of the plurality of supports, it is bent at the supports located at the corners of the periphery of the land or building in a plan view, so that a continuous waterproof wall is formed by the waterproof sheet.

[0014] According to the above configuration, when not in use, the waterproof sheet is folded or rolled up and placed on the waterproof sheet fixing part, so that it looks good and does not interfere with daily life. Then, when in use, the folded or rolled waterproof sheet is simply pulled up and supported by the posts, and a continuous waterproof wall is completed with bent corners at the posts at the corners of the land or building in a plan view. Therefore, it is extremely easy to appropriately cover the parts of the protected object that need protection and easily prevent water ingress.

[0015] In the second invention, the waterproof sheet fixing portion includes a continuously dug sheet storage groove portion, The waterproof sheet is folded or rolled up and stored in the sheet storage groove, and is configured to form a continuous waterproof wall when pulled up.

[0016] According to the above configuration, when not in use, the waterproof sheet is stored folded or rolled up in the sheet storage groove, so that it looks good and does not interfere with daily life. When in use, a continuous waterproof wall is completed by simply pulling up the waterproof sheet stored in the sheet storage groove and supporting it on the posts.

[0017] In a third aspect of the present invention, in the first or second aspect of the present invention, The lower end of the waterproof sheet is fixed to the side of the sheet storage groove opposite the land or building to be protected.

[0018] According to the above-mentioned configuration, the waterproof sheet is easy to pull up, and even after it is pulled up, it extends diagonally toward the top of the pole, so the waterproof sheet is stable and easy to store. In addition, since the waterproof sheet is fixed to the outside of the pole when viewed from the land or building, rainwater that falls within the area enclosed by the waterproof sheet can escape into the sheet storage groove.

[0019] In a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, The waterproof sheet is suspended via a beam member supported across the tops of a number of posts.

[0020] According to the above-mentioned configuration, the waterproof sheet is supported by the beam members that span the upper parts of the multiple pillars, so compared to a case in which there are no beam members, the waterproof wall is less likely to bend and has increased strength, and the height of the waterproof wall can be increased. In addition, because the beam members are supported by multiple pillars, the load applied to the waterproof sheet can be dispersed.

[0021] In a fifth aspect of the present invention, in any one of the first to third aspects of the present invention, A beam member is integrally provided on the waterproof sheet, By supporting the beam member so as to span the tops of a number of supports, a continuous waterproof wall is formed by the waterproof sheet.

[0022] According to the above-mentioned configuration, the waterproof sheet is supported by the beam members that are integral with the waterproof sheet, so compared to a case in which there are no beam members, the waterproof wall is less likely to bend and has increased strength, and the height of the waterproof wall can be increased. In addition, since the beam members are supported by multiple supports, the load applied to the waterproof sheet can be dispersed.

[0023] In a sixth aspect of the present invention, in any one of the first to third aspects of the present invention, The plurality of pillars are provided with locking portions, The waterproof sheet is configured so that a latched portion is hooked onto the latching portion.

[0024] The above-mentioned configuration has a very simple structure, and since it is only necessary to hook the locked portion onto the locking portion, the workability is also good.

[0025] In a seventh aspect of the present invention, in any one of the first to third aspects of the present invention, A pipe member or a sealed portion is provided on the upper portion of the waterproof sheet, A wire is passed through the pipe member or the sealed portion, The tarpaulin is suspended from the posts via the wires.

[0026] According to the above configuration, by pulling the wire, the pipe member or sealed portion through which the wire passes is pulled up, and the waterproof sheet on one side is pulled up. Therefore, even if the waterproof sheet is heavy, the waterproof wall can be easily and reliably installed. In addition, since the wire is passed through the rigid pipe member or sealed portion, the upper end of the waterproof sheet is less likely to bend when the wire is wound up with a winch or the like.

[0027] In an eighth aspect of the present invention, in any one of the first to sixth aspects of the present invention, The multiple supports are arranged in a retractable or detachable manner near the waterproof sheet fixing portion, and are configured so that the waterproof sheet can be hung from the upper portions.

[0028] According to the above-mentioned configuration, the posts can be stored or removed when not in use, just like the waterproof sheet, so that it looks good and does not interfere with daily life. Note that "near the groove for storing sheets" can mean either the inside or outside of the groove for storing sheets when viewed from the land or building to be protected.

[0029] The ninth flood prevention method is: A waterproof sheet fixing section is provided continuously around the land or building to be protected, The waterproof sheet is continuously arranged on the waterproof sheet fixing portion by folding or rolling it, When in use, the waterproof sheet is pulled up and supported on a number of posts around the land or building, so that the waterproof sheet forms a waterproof wall that continuously covers the perimeter of the land or building by folding at the posts at the corners of the perimeter of the land or building in a plan view.

[0030] According to the above configuration, when not in use, the waterproof sheet is folded or rolled up and placed on the waterproof sheet fixing part, so that it looks good and does not interfere with daily life. Then, when in use, the waterproof sheet that was folded or rolled up is simply pulled up and supported by the posts, and a waterproof wall that continuously covers the perimeter of the land or building is completed by bending it at the posts at the corners of the perimeter of the land or building in a plan view. Therefore, it is possible to easily prevent water intrusion by appropriately covering the parts of the protected object that need protection.

[0031] In a tenth flood prevention method, in the ninth aspect of the invention, A groove for storing a sheet is dug continuously as the waterproof sheet fixing portion, The waterproof sheet is folded or rolled up and stored continuously in the sheet storage groove.

[0032] According to the above configuration, when not in use, the waterproof sheet is stored in the sheet storage groove, so it looks good and does not interfere with daily life. When in use, the waterproof sheet stored in the sheet storage groove is simply pulled up and supported by the posts to complete a waterproof wall that continuously covers the perimeter of the land or building.

[0033] An eleventh aspect of the present invention is the ninth or tenth aspect of the present invention, A beam member is supported so as to straddle the upper portions of the plurality of columns; The waterproof sheet is suspended via the beam member.

[0034] According to the above-mentioned configuration, the waterproof sheet is supported by the beam members that span the upper parts of the multiple pillars, so compared to a case in which there are no beam members, the waterproof wall is less likely to bend and has increased strength, and the height of the waterproof wall can be increased. In addition, since each side is supported by multiple pillars, the load applied to the waterproof sheet can be distributed.

[0035] In a twelfth aspect of the present invention, in the ninth or tenth aspect of the present invention, A beam member is integrally provided on the waterproof sheet, The beam member is supported so as to span the upper parts of a number of supports, so that a continuous waterproof wall is formed by the waterproof sheet.

[0036] According to the above-mentioned configuration, the waterproof sheet is supported by the beam members that are integral with the waterproof sheet, so compared to a case in which there are no beam members, the waterproof wall is less likely to bend and has increased strength, and the height of the waterproof wall can be increased. In addition, since the beam members are supported by multiple supports, the load applied to the waterproof sheet can be dispersed.

[0037] In a thirteenth aspect of the present invention, in the ninth or tenth aspect of the present invention, A pipe member or a bag-sealing portion is provided on the upper portion of the waterproof sheet, Passing a wire through the pipe member or the sealed portion; The waterproof sheet is suspended from the support pole via the wire.

[0038] According to the above configuration, by pulling the wire, the pipe member or sealed portion through which the wire passes is pulled up, and the waterproof sheet on one side is pulled up. Therefore, even if the waterproof sheet is heavy, the waterproof wall can be easily and reliably installed. In addition, since the wire is passed through the rigid pipe member or sealed portion, the upper end of the waterproof sheet is less likely to bend when the wire is wound up with a winch or the like.

[0039] In a fourteenth aspect of the present invention, in any one of the ninth to thirteenth aspects of the present invention, The method includes a step of erecting the plurality of posts stored near the waterproof sheet fixing portion when in use.

[0040] According to the above-mentioned configuration, when not in use, the support pole is stored and does not get in the way, and when in use, it is sufficient to simply stand it up, which improves operability. Effect of the Invention

[0041] As described above, according to the present invention, the portion of the protection target that needs protection can be covered to easily prevent water ingress. [Brief description of the drawings]

[0042] [Figure 1] FIG. 1 is a perspective view showing an overview of a flood prevention system according to a first embodiment of the present invention in a stored state. [Diagram 2] FIG. 1 is a perspective view showing an overview of a flood prevention system according to a first embodiment of the present invention in a state where a support pillar is raised. [Diagram 3] FIG. 1 is a perspective view showing an overview of a state in which a flood prevention system according to a first embodiment of the present invention is in use. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 3, illustrating an overview of a state in which the flood defense system according to the first embodiment of the present invention is in use. FIG. [Diagram 5] FIG. 11 is a perspective view showing an overview of a state in which a flood prevention system according to a second embodiment of the present invention is in use. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. 5, illustrating an overview of a state in which a flood prevention system according to a second embodiment of the present invention is in use. [Figure 7] FIG. 11 is a perspective view showing an overview of a flood prevention system according to a third embodiment of the present invention in a stored state. [Figure 8] FIG. 11 is a perspective view showing an overview of a flood prevention system according to a third embodiment of the present invention in use. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0043] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0044] (Embodiment 1) - Flood prevention system configuration - 1 to 4 show a flood defense system 1 according to a first embodiment of the present invention, which includes a sheet storage groove 2 as a waterproof sheet fixing portion that is continuously dug in a polygonal shape. The sheet storage groove 2 of this embodiment is, for example, rectangular in plan view, but may be triangular, square, pentagonal, hexagonal, or other shapes. The sheet storage groove 2 can be installed not only when a building is newly constructed, but also after construction. From the standpoint of appearance, safety, and the like, it is preferable to cover the upper part of the sheet storage groove 2 with an openable grating (not shown) or the like. Although not shown, the sheet storage groove 2 has a drain hole at an appropriate location. In addition, in order to prevent sewage from backflowing from the drain hole during flooding, it is preferable to provide the drain hole with an openable cover or a check valve that opens only in the drain direction.

[0045] Although each diagram does not show the object of protection, the scope of application is wide, including surrounding not only a single house but an entire block containing multiple houses, surrounding parks etc. as evacuation sites, and surrounding farmland to prevent the outbreak of crop diseases due to flooding or inundation.

[0046] As shown in Figs. 1 and 3, the waterproof sheet 3 is stored in the sheet storage groove 2 so as to be folded and form a waterproof wall 6 having a continuous polygonal shape in plan view when pulled up. When folding the waterproof sheet 3, it is folded so that the waterproof sheet 3 can be pulled out appropriately, particularly at the corners. The folding is performed appropriately depending on the angle of the corners, the thickness of the waterproof sheet 3, etc. The waterproof sheet 3 only needs to be waterproof and flexible, but considering that it will be used outdoors for a long period of time, it is made of materials such as rubber sheets, PVC sheets, and tarpaulins that are highly weather-resistant, such as water-resistant, heat-resistant, and ozone-resistant, and in order to increase waterproofness and strength against impact, so-called rubberized cloth is more preferable than a single waterproof sheet.

[0047] In this embodiment, multiple (e.g., three) supports 4 are provided not only at the corners of the rectangle but also on each side forming the rectangle to support the pulled-up waterproof sheet 3. In this embodiment, the multiple supports 4 are provided retractably or detachably inside the sheet storage groove 2 (on the side of the land or building that is protected from inland flooding, etc.), and are configured so that the waterproof sheet 3 can be hung from the top. The number of supports 4 may be more or less than this.

[0048] In this embodiment, each support 4 can be stored in the ground in the usual manner, in the manner of a vertical bollard of a car stopper. As shown in FIG. 4, the depth of the support storage hole 4c provided in the ground should be excavated deeper than the height of the support 4. For example, a swivel eye bolt 4a is provided on the upper part of the support 4, and the hanging ring part is designed to be able to rotate, fall, etc. freely. Although not shown, the seat surface of the swivel eye bolt 4a should be concave so that it does not protrude from the upper part of the support 4 when the support 4 is stored. Alternatively, the swivel eye bolt 4a may be fastened to a female thread part provided on the upper part of the support 4 when in use. In this embodiment, the support 4 is pulled out by putting a hand on the swivel eye bolt 4a, but the stored state and the use state may be switched by using an electric or hydraulic actuator such as a motor or a cylinder.

[0049] The lower end 3a of the waterproof sheet 3 is fixed to the opposite side of the sheet storage groove 2 from the land or building to be protected. The waterproof sheet 3 is stored in the sheet storage groove 2 in a manner that wraps around the entire length of the sheet storage groove 2.

[0050] As shown in FIG. 2, the pulled-up support 4 is fixed so as not to return to the support receiving hole 4c by inserting a lock pin 4b into the underside thereof.

[0051] As shown in Fig. 3, the upper end of the waterproof sheet 3 is suspended from a beam member 5 made of, for example, a round bar or a round pipe, which is supported so as to straddle the upper parts of a number of supports 4 provided on each side of a rectangle. Specifically, eyelet holes 3b are provided at appropriate intervals on the upper end side of the waterproof sheet 3, and shackles 3c or carabiners hooked onto the beam member 5 are inserted into these eyelet holes 3b. Note that the shackle is not limited to the shackle 3c or carabiner, and any ring-shaped or hook-shaped sling that can be opened or closed in part can be used. When in use, the waterproof sheet 3 is pulled up so as to incline upward toward the upper part of the supports 4.

[0052] -Waterproofing method- Next, a flood prevention method according to this embodiment will be described.

[0053] As shown in Figure 1, when not in use, the waterproof sheet 3 is stored in the sheet storage groove 2, and all of the posts 4 are stored in the post storage holes 4c. This gives a good appearance and does not interfere with daily life. The sheet storage groove 2 is covered with a grating (not shown).

[0054] When in use, after removing the grating and the like, first, as shown in Figure 2, all of the pillars 4 are pulled up by hooking them by the hanging rings of the swivel eye bolts 4a, and the lock pins 4b are inserted into the through holes (not shown) on the lower ends to secure them so that they do not return to the pillar storage holes 4c.

[0055] Next, as shown in FIG. 3, for example, with the swivel eyebolts 4a at the top of each of the five or three supports 4 pulled up, a beam member 5 is inserted through the hanging rings.

[0056] Then, for example, shackles 3c are arranged on the beam members 5 between each pair of the posts 4. The number of shackles 3c may be more or less than that in the example of FIG.

[0057] Next, the waterproof sheet 3 is pulled up and the shackle 3c is inserted through the eyelet hole 3b on the upper side to hang the waterproof sheet 3. When this operation is performed on all four sides, a waterproof wall 6 with sloping side walls with a rectangular cross section is completed, as shown in Figure 3. Note that a pattern or the like may be drawn on the outer peripheral surface of the waterproof wall 6 to prevent a poor appearance.

[0058] Although not shown, instead of passing the shackle 3c through the eyelet hole 3b, a sealed portion may be provided at the upper end of the waterproof sheet 3, and the beam member 5 may be inserted into this sealed portion. In this case, it is preferable to provide a hook for fixing the beam member 5 to the support 4.

[0059] In this way, in this embodiment, by simply pulling up the waterproof sheet 3 stored in the sheet storage groove section 2 and supporting it on the support posts 4, a waterproof wall 6 that is polygonal in plan view and continuously covers the perimeter of the land or building is completed.

[0060] In addition, since the waterproof sheet 3 is supported via beam members 5 spanning the upper parts of multiple supports 4, the strength is increased and the height of the waterproof wall 6 can also be increased.

[0061] Furthermore, the posts 4 can be stored or removed when not in use, just like the waterproof sheet 3, so that the appearance is good and the posts 4 do not interfere with daily life.

[0062] In this embodiment, the waterproof sheet 3 is fixed to the outside of the support poles 4, so that rainwater that falls within the area surrounded by the waterproof sheet 3 can escape into the sheet storage groove 2.

[0063] In this embodiment, the lower end 3a of the waterproof sheet 3 is fixed on the side opposite the land or building that is to be protected by the sheet storage groove 2, making the waterproof sheet 3 easy to pull up, and even after being pulled up, it extends diagonally toward the top of the support 4, making the waterproof sheet 3 stable and easy to store.

[0064] Therefore, the flood prevention system 1 according to this embodiment can easily prevent flooding by covering the parts of the protection target that need protection.

[0065] The waterproof wall 6 of the waterproof sheet 3 alone can effectively prevent minor flooding that does not fall under the category of "flooding above floor level or flooding exceeding 45 cm above ground level," which is not covered by fire insurance premiums.

[0066] (Embodiment 2) - Flood prevention system configuration - 5 and 6 show a flood prevention system 101 according to a second embodiment of the present invention, which differs from the first embodiment mainly in the way in which the waterproof sheet 103 is hung and the number of posts. In the following embodiments, the same parts as those in Figs. 1 to 4 are given the same reference numerals and detailed description thereof will be omitted.

[0067] The flood prevention system 101 of this embodiment has a sheet storage groove 102 as a waterproof sheet fixing portion that is rectangular in plan view, as in the first embodiment, and a continuous waterproof sheet 103 is folded and stored in this sheet storage groove 102. On the inside (the side to be waterproofed), for example, four posts 104 are vertically erected. For example, an L-shaped hook 104a is provided on the upper side of each post 104. More than four posts 104 may be provided.

[0068] Unlike the first embodiment, the bottom end 103a of the waterproof sheet 103 does not have to be provided on the side opposite the land or building to be protected by the sheet storage groove 102.

[0069] The upper end of the waterproof sheet 103 is configured with eyelet holes 103b as hooked portions and holes so that the hooks 104a can be hung on them. These eyelet holes 103b should be at least as many as the hooks 104a and located at positions corresponding to the hooks 104a.

[0070] Although not shown, a sealed section may be provided at the top end of waterproof sheet 103, a pipe serving as an anchoring section may be inserted through this sealed section, and both ends of the pipe may be hung on hooks 104a serving as anchoring sections in the same manner as a clothesline pole, or the longitudinal middle section of the pipe may be hung on hooks 104a from the open section of the sealed section. Also, a beam member may be provided integrally with waterproof sheet 103, and the anchoring section of this beam member (for example, both ends) may be hung on hooks 104a.

[0071] A hook may be provided as the locked portion on the waterproof sheet 103 side, and a hole or a hook may be provided as the locking portion on the support pole 104 side.

[0072] -Waterproofing method- Next, a flood prevention method according to this embodiment will be described.

[0073] Although not shown, when not in use, the waterproof sheet 103 is folded and stored in the sheet storage groove 102 as in Fig. 1, so that it looks good and does not interfere with daily life. The posts 104 may be stored underground as in the above-mentioned embodiment 1, or may be stored in the sheet storage groove 102 or the like and then attached when in use.

[0074] When using the facility during inland flooding, the support posts 104 are first erected at least at the corners.

[0075] Next, the waterproof sheet 103 on each side of the sheet storage groove 102 is pulled up in order, and the hook 104a is hung on the eyelet hole 103b at the upper end.

[0076] As a result, a waterproof wall 106 having a square cross section as shown in Figs. 5 and 6 is completed.

[0077] This embodiment has an extremely simple structure and is easy to work with, and is suitable for protecting relatively small buildings, etc.

[0078] (Embodiment 3) - Flood prevention system configuration - 7 and 8 show a flood prevention system 201 according to a third embodiment of the present invention, which differs from the first and second embodiments described above mainly in that a winch 208 is used to pull up a waterproof sheet 203.

[0079] The flood prevention system 201 of this embodiment, like the above-mentioned embodiments 1 and 2, has a sheet storage groove 202 as a waterproof sheet fixing part which is rectangular in plan view, and a continuous waterproof sheet 203 is folded and stored in this sheet storage groove 202.

[0080] A pulley 204a is provided on the upper part of at least some (two in this embodiment) of the multiple support columns 204. An eyebolt 204b is fixed to the upper part of the remaining two support columns 204 that do not have the pulley 204a.

[0081] A pipe member 205 extending toward the other support pole 204 is provided on one side of the upper portion of the waterproof sheet 203 hung on the support pole 204 with the pulley 204a. For example, the pipe member 205 is fixed to the upper end of the waterproof sheet 203 by adhesion, bolting, or the like. Instead of the pipe member 205, a sealed portion (not shown) may be formed on one side of the upper end of the waterproof sheet 203.

[0082] A wire 207 extending from a pulley 204a is passed through the pipe member 205 (or the sealed portion).

[0083] The tip of this wire 207 is connected to an eyebolt 204 b at the top of the other support 204 .

[0084] A wire 207 hung on the pulley 204a is wound up by an electrically or hydraulically driven winch 208, so that the waterproof sheet 203 is pulled up to the upper side of the support pole 204. The height of the waterproof sheet 203 may be adjusted by the amount of winding by the winch 208 to a height at which water caused by inland flooding can be stopped.

[0085] It is also possible to provide an additional support between the pair of supports 204, and to hook the pipe member 205 onto the hook of the additional support. In the portion of this intermediate support, the waterproof sheet 203 does not need to be bent in plan view.

[0086] In addition, although the wire 207 is passed through two opposing sides of the waterproof sheet 203, the wire 207 may be passed through all four sides via the pipe member 205 or sealed portion, and the wire 207 may be wound up by one winch 208.

[0087] -Waterproofing method- Next, the operation of the flood defense system 201 according to this embodiment will be described.

[0088] First, the grating and the like are removed, and the four support columns 204 are erected. Note that, as shown in FIG. 7, these support columns 204 may be always provided.

[0089] Then, for example, wire 207 is passed through pipe member 205 stored in seat storage groove 202, and the other end is connected to the corresponding eyebolt 204b. As shown in Fig. 7, wire 207 may be already hung on eyebolt 204b when not in use, in which case it is advantageous that waterproof wall 206 can be formed immediately.

[0090] When both wires 207 and winches 208 are ready, each winch 208 is driven to start winding the wire 207.

[0091] Then, the pipe members 205 are successively pulled up, and as a result, the waterproof sheet 203 is pulled up, completing a waterproof wall 206 with a rectangular cross section, as shown in FIG.

[0092] In this manner, in this embodiment, by using the winch 208 to pull the wire 207 hung on the pulley 204a, the pipe member 205 or the sealed portion through which the wire 207 is passed is pulled up, and one side of the waterproof sheet 203 is pulled up.

[0093] Since the driving force of the winch 208 is used, this has the advantage that the waterproof wall 206 can be easily and reliably installed even if the waterproof sheet 203 is heavy.

[0094] In addition, since the wire 207 is passed through the rigid pipe member 205 or the sealed portion, bending or the like is unlikely to occur at the upper end of the waterproof sheet 203 when the wire 207 is wound up with the winch 208.

[0095] It should be noted that the above-described embodiments are essentially preferred examples, and are not intended to limit the scope of the present invention, its applications, or uses.

[0096] For example, in each of the above embodiments, the waterproof wall 6, 106, 206 is provided in a rectangular shape in plan view, but it may be provided in a curved shape such as a circle, an ellipse, or an oval in plan view. In addition, even if the waterproof wall 6, 106, 206 is not provided, if there is a retaining wall in a part, the waterproof wall may be provided only in the other necessary areas, not around the entire circumference. In such a case, the sheet storage groove 2, 102, 202 and the support pillar 4, 104, 204 may be arranged according to the shape. Furthermore, if a part is recessed in plan view, the support pillar 4, 104, 204 may be arranged at the corner part on the opposite side to the land or building to be protected (outside the waterproof sheet 3, 103, 203). In this case, the lower end of the waterproof sheet 3, 103, 203 may be fixed to the sheet storage groove 2, 102, 202 on the opposite side to the land or building to be protected.

[0097] In the above embodiments, the waterproof sheet 3, 103, 203 is folded and stored in the sheet storage groove 2, 102, 202, but it may also be partially rolled up and stored. In addition, if the sheet storage groove 2, 102, 202 is not dug, the folded or rolled waterproof sheet 3, 103, 203 may be placed directly on the ground or in a box placed on the ground.

[0098] Furthermore, in each of the above embodiments, the waterproof sheets 3, 103, 203 are raised in an emergency, but in some cases they may be kept raised for a long period of time even during normal times.

[0099] The posts 4, 104, 204 may be stored in a warehouse or other location and brought in when needed, or may be permanently erected. For example, when enclosing farmland to be protected, posts that were used to keep out wild boars may be used to hang a waterproof sheet. [Explanation of symbols]

[0100] 1. Flood control system 2 Groove for storing sheet (waterproof sheet fixing part) 3. Tarpaulin 3a bottom edge 3b Eyelet hole (hole) 3c Shackle 4 pillars 4a Swivel eye bolt 4b Lock pin 4c Post storage hole 5 Beam members 6 waterproof wall 101 Flood Control System 102 Groove for storing sheet (waterproof sheet fixing part) 103 Tarpaulin 103a Bottom end 103b Eyelet hole (hole, locked part) 104 Post 104a Hook (retaining part) 106 Waterproof wall 201 Flood Control System 202 Groove for storing sheet (waterproof sheet fixing part) 203 Tarpaulin 204 Post 204a Pulley 204b Eyebolt 205 Pipe members 206 Waterproof wall 207 Wire 208 Winch

Claims

1. A waterproof sheet fixing portion that is continuously installed around the land or building to be protected; A waterproof sheet having a lower end fixed to the waterproof sheet fixing portion and continuously covering the periphery of the land or building; A plurality of posts are provided in the vicinity of the waterproof sheet fixing portion and support the waterproof sheet, The waterproof sheet can be fixed to the waterproof sheet fixing portion and can be pulled up and fixed to the upper part of the plurality of supports, When the waterproof sheet is pulled up and fixed to the top of the plurality of supports, it bends at the supports at the corners of the periphery of the land or building in a plan view, and a continuous waterproof wall is formed by the waterproof sheet, The plurality of posts stored in the vicinity of the waterproof sheet fixing portion are configured to be pulled out and erected when in use. A flood prevention system characterized by:

2. The waterproof sheet fixing portion includes a continuous sheet storage groove portion, The waterproof sheet is folded or rolled up and stored in the sheet storage groove, and is configured to form a continuous waterproof wall when pulled up.

2. The flood control system according to claim 1.

3. The seat storage groove portion is formed with a drainage hole for drainage, The lower end of the waterproof sheet is fixed to the opposite side of the sheet storage groove from the land or building to be protected.

3. The flood control system according to claim 2.

4. The waterproof sheet is suspended via a beam member supported so as to span the tops of a number of posts.

3. A flood prevention system according to claim 1 or 2.

5. A beam member is integrally provided on the waterproof sheet, By supporting the beam member so as to span the upper parts of a plurality of supports, a continuous waterproof wall is formed by the waterproof sheet.

3. A flood prevention system according to claim 1 or 2.

6. The plurality of pillars are provided with locking portions, The waterproof sheet is configured so that a latched portion is hooked onto the latch portion.

3. A flood prevention system according to claim 1 or 2.

7. A pipe member or a sealed portion is provided on the upper portion of the waterproof sheet, A wire is passed through the pipe member or the sealed portion, The waterproof sheet is suspended from the pole via the wire.

3. A flood prevention system according to claim 1 or 2.

8. The plurality of posts are provided in a retractable or detachable manner near the waterproof sheet fixing portion, and are configured so that the waterproof sheet can be hung from the upper portion.

3. A flood prevention system according to claim 1 or 2.

9. A waterproof sheet fixing section is provided continuously around the land or building to be protected, The waterproof sheet is continuously arranged on the waterproof sheet fixing portion by folding or rolling it, When in use, the plurality of supports stored near the waterproof sheet fixing portion are pulled out and erected, and the waterproof sheet is pulled up and supported by the plurality of supports around the land or building, so that the waterproof sheet bends around the supports at the corners of the land or building in a plan view, thereby forming a waterproof wall that continuously covers the perimeter of the land or building. A waterproofing method comprising:

10. A groove for storing a sheet is dug continuously as the waterproof sheet fixing portion, The waterproof sheet is folded or rolled up and stored continuously in the sheet storage groove.

10. The method for flood prevention according to claim 9.

11. A beam member is supported so as to straddle the upper portions of the plurality of columns; The waterproof sheet is suspended via the beam member.

11. The method for flood prevention according to claim 9 or 10.

12. A beam member is integrally provided on the waterproof sheet, The beam member is supported so as to span the tops of a plurality of posts, thereby forming a continuous waterproof wall using the waterproof sheet.

11. The method for flood prevention according to claim 9 or 10.

13. A pipe member or a bag-sealing portion is provided on the upper portion of the waterproof sheet, Passing a wire through the pipe member or the sealed portion; The waterproof sheet is suspended from the support via the wire.

11. The method for flood prevention according to claim 9 or 10.

14. The lower end of the waterproof sheet is fixed to the opposite side of the sheet storage groove portion from the land or building to be protected, The waterproof sheet is pulled up and supported on a plurality of posts around the land or building, and the waterproof sheet is drained through the drainage holes formed in the sheet storage groove. The method for flood prevention according to claim 10.

15. The plurality of supports are provided so as to be storable in support storage holes provided on the inside of the waterproof sheet fixing portion, and are configured to be pulled out of the support storage holes when in use.

3. A flood prevention system according to claim 1 or 2.

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