Waterproofing structure

Abstract

The device includes an attachment portion (3) provided along the embankment (10), and an expansion member (2) whose base end (2a) is fixed to one side of the attachment portion and which can be changed in shape from a flat folded state to an expanded state by pumping air into it, and which, when expanded, prevents the outflow of water at a level higher than the top surface of the embankment. The expansion member is made of a long, expandable member that extends along the embankment and has a base end and an expansion member main body (2b) that is continuous with the base end and expands to have a curved surface when filled with air in the expanded state, and has a flat surface in the folded state. In at least the portion including the bridge portion (B) of the road (R) that intersects the embankment, the attachment portion does not protrude above the surface of the road, allowing vehicles to run on the attachment portion.

Description

[Technical field]

[0001] The present invention relates to a waterproof structure provided with an expansion member made of an expandable material, and a waterproof method using the same. [Background technology]

[0002] Conventionally, a flood control structure using a flexible long bag has been known, which comprises multiple pairs of anchoring means embedded in a row at predetermined intervals along the longitudinal direction of a levee constructed to protect against the flooding of rivers and lakes and the intrusion of seawater into land, a flexible long bag placed on the top surface of the levee along the longitudinal direction of the levee and which expands and stands up when a fluid is supplied to it and collapses when it is discharged, and a plurality of flexible connecting members that can be moored to the anchoring means arranged in a row (see, for example, Patent Document 1).

[0003] Also, as disclosed in Patent Document 2, an inflatable waterproof fence device is known in which a storage box for a waterproof fence with an opening / closing lid is installed on the ground in a waterproof area such as the embankment of a river or lake or in a residential area, and a waterproof fence made of a rubber bag that can be expanded and contracted in the vertical direction by injecting and discharging fluid is stored inside the storage box, and by supplying fluid to the waterproof fence, the opening / closing lid opens and the waterproof fence is raised and extended. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 64-21111 [Patent Document 2] Patent No. 3656769 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional waterproof fences are generally designed to be installed along rivers, and cannot prevent flooding including roads over bridges, so there is a problem that they cannot be used to prevent flooding in rivers with many bridges, such as small rivers in urban areas. Similarly, they cannot be used to waterproof areas of buildings and premises, particularly areas where vehicles and people pass, including entrances, in the event of a risk of inland flooding of sewer systems due to river flooding or sudden rainfall.

[0006] The present invention has been made in consideration of the above points, and its purpose is to make it possible to effectively prevent flooding, including in road sections over bridges and around entrances to buildings or sites. [Means for solving the problem]

[0007] In order to achieve the above object, in this invention, an expansion member and its attachment portion are provided without any significant step with respect to a road or passageway leading to a bridge or entrance / exit.

[0008] Specifically, the waterproof structure of the first aspect of the invention comprises: An attachment section provided along the embankment; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by inflating it by pumping air into it, and preventing the outflow of water when the water level rises above the upper surface of the embankment in the expanded state; The expansion member is a longitudinal inflatable member extending along said bank; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least the portion including the road that intersects with the embankment and leads to the bridge portion, the mounting portion is contained in a recess for installing an expansion member formed on the upper surface of the road and does not protrude above the surface of the road, and is configured to allow vehicles and people to pass over the mounting portion and the expansion member contained in the recess for installing the expansion member.

[0009] According to the above configuration, the mounting portion accommodated in the recess for installing the expansion member does not protrude from the road surface, so that even if the expansion member is installed in front of a bridge, it does not interfere with vehicle travel. The expansion member is easy to install because only the base end is fixed to the mounting portion. In addition, since the expansion member is expanded by air, it is easier to expand than liquid, and it is easy to return to its original state because it only needs to return to a flat, folded state. Note that the term "embankment" generally refers to a structure made of earth and stone or concrete that is installed along a river bank, lake bank, or coast to prevent flooding of rivers and lakes and intrusion of seawater, but it also includes the wall of a bank that does not have an embankment, such as a small river flowing through an urban area. In addition, "flat plate-like" means not only a completely flat plate-like shape, but also a plate-like shape with unevenness formed on the surface for anti-slip, drainage, etc. In addition, "not protruding from the surface" means that it is not limited to a completely flat state, but does not have any protrusion that would interfere with the passage of cars or people.

[0010] The waterproof structure of the second invention is as follows: A mounting portion provided along a building or site having a passageway leading to an entrance and exit for vehicles and people; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by supplying air thereinto, and preventing the outflow of water at a raised water level in the expanded state; The expansion member is a length of inflatable member along the building or site; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least the portion including the passageway leading to the entrance / exit, the mounting portion is accommodated in a recess for installing an expansion member formed on the upper surface of the passageway and does not protrude above the surface of the passageway, and is configured to allow vehicles and people to pass over the mounting portion and the expansion member accommodated in the recess for installing the expansion member.

[0011] According to the above configuration, the building and site are waterproofed by expanding the expansion member when there is a risk of inundation of water in the sewer system due to river flooding or sudden rainfall. Under normal circumstances, the mounting part to which the expansion member is attached in the passageway leading to the entrance does not protrude from the surface of the passageway, allowing vehicles and people to pass over the mounting part and the expansion member. The expansion member is easy to install, since only the base end is fixed to the mounting part. In addition, since the expansion member is expanded by air, it is easier to expand than liquid, and it is easy to return to its original state by simply returning it to its flat, folded state.

[0012] In a third aspect of the present invention, in the first or second aspect of the present invention, In at least the portion including the road intersecting the embankment leading to the bridge portion or at least the portion including the passage leading to the entrance / exit, the expansion member at least in the folded state is covered with a cover member, and the cover member covering the expansion member in the folded state does not protrude above the surface of the road or passage, allowing vehicles and people to pass over the cover member.

[0013] According to the above-mentioned configuration, since the expansion member is covered with the cover member, the expansion member is less likely to be damaged and its durability is improved compared to when vehicles or the like pass directly over the expansion member. In addition, since the cover member does not protrude from the surface of the road or passage, it does not interfere with the travel of vehicles or the like.

[0014] In a fourth aspect of the present invention, in the first or second aspect of the present invention, The expansion member installation recess is formed so that the periphery of the mounting portion is deep and the periphery of the expansion member is shallow.

[0015] According to the above-mentioned configuration, the load applied to the expansion member can be supported by the bottom surface of the expansion member installation recess, and the mounting portion can be configured not to protrude.

[0016] In the fifth aspect of the present invention, in the fourth aspect of the present invention, The mounting portion is covered with a three-dimensional mounting portion cover so as to fill the gap inside the expansion member installation recess, and is configured to allow vehicles and people to pass over the mounting portion cover and the expansion member.

[0017] According to the above configuration, the mounting portion is covered with a three-dimensional mounting portion cover that fills the gap inside the recess for installing the expansion member, so that it is reliably protected and unevenness is reduced, making it less likely to get in the way when the vehicle, etc. is traveling.

[0018] In a sixth aspect of the present invention, in the first or second aspect of the present invention, A plurality of the expansion members have connecting portions at their longitudinal ends.

[0019] According to the above configuration, expansion members of a predetermined length can be connected to each other by the connecting parts, so that the expansion members can be installed over long distances along embankments, buildings, or sites.

[0020] In a seventh aspect of the present invention, in the sixth aspect of the present invention, The connecting portion is made of multiple metal plates, which sandwich the longitudinal ends of the multiple expansion members, and the connecting portion is covered with a connecting portion cover to reduce unevenness and prevent water from leaking from the connecting portion.

[0021] According to the above configuration, by making the connecting part out of a highly rigid metal plate, the expansion member is firmly connected, and by covering it with a connecting part cover, not only is unevenness reduced, but water can be prevented from leaking out of the connecting part during expansion.

[0022] In an eighth aspect of the present invention, in the sixth aspect of the present invention, A communication pipe extending in the longitudinal direction is provided inside the connecting portion, and communicates between adjacent expansion members in the longitudinal direction.

[0023] According to the above configuration, adjacent expansion members in the longitudinal direction are connected to each other, so that multiple expansion members can be expanded simultaneously by one blower and evacuated by one vacuum pump after expansion.

[0024] In a ninth aspect of the present invention, in the sixth aspect of the present invention, At the connection portion, the longitudinal ends of the expansion member are connected in a sealed manner.

[0025] According to the above-mentioned configuration, it is also possible to connect the expansion members adjacent in the longitudinal direction in a sealed manner without changing the cross-sectional area.

[0026] In a tenth aspect of the present invention, in the sixth aspect of the present invention, The connecting portion is composed of a strip-shaped member, and the strip-shaped member is bonded to the adjacent expansion members in a state in which it straddles and covers the longitudinal ends of the expansion members, thereby connecting the expansion members.

[0027] According to the above configuration, by connecting adjacent expansion members in the longitudinal direction with a band-shaped member, the cross-sections of the expansion members when expanded can be maintained almost uniform at the connecting portion, so that water does not flow in at the connecting portion.

[0028] In an eleventh aspect of the present invention, in the second aspect of the present invention, A plurality of the expansion members are also connected at the corners of the building or site.

[0029] According to the above configuration, by expanding the expansion member, water does not flow into corners of a building or site.

[0030] In a twelfth aspect of the present invention, in the first or second aspect of the present invention, An anti-slip structure is provided on a portion of the expansion member that becomes the upper surface in the folded state.

[0031] According to the above configuration, people, vehicles, etc. can pass through the expansion member safely without slipping.

[0032] In a thirteenth aspect of the present invention, in the twelfth aspect of the present invention, The anti-slip structure has an uneven surface.

[0033] According to the above-mentioned configuration, the anti-slip effect can be obtained with a simple configuration.

[0034] In a fourteenth aspect of the present invention, in the thirteenth aspect of the present invention, The uneven surface serves as a drainage groove.

[0035] According to the above configuration, water does not accumulate on the surface of the expansion member, making travel easier.

[0036] In a fifteenth aspect of the present invention, in the fourteenth aspect of the present invention, The drainage groove traverses the entire width of the expansion member.

[0037] According to the above configuration, water on the surface of the expansion member is easily discharged to the outside of the expansion member.

[0038] In a sixteenth aspect of the present invention, in the fourteenth aspect of the present invention, The drainage grooves intersect the lengthwise and widthwise directions of the expansion member.

[0039] According to the above-mentioned configuration, water on the surface of the expansion member is more effectively drained out of the expansion member.

[0040] In a seventeenth aspect of the present invention, in the fourteenth aspect of the present invention, The drainage groove has a woven structure.

[0041] According to the above-mentioned configuration, a higher anti-slip effect can be obtained.

[0042] In an eighteenth aspect of the present invention, in the third aspect of the present invention, The cover member has holes through which water can pass.

[0043] According to the above configuration, water does not accumulate on the surface of the cover member when folded, and water pressure is easily released when inflated, thereby reducing the load applied to the inflatable member.

[0044] In a nineteenth aspect of the present invention, in the eighteenth aspect of the present invention, The cover member is made of a grating member.

[0045] According to the above-mentioned configuration, a cover member that is easy to obtain and has high rigidity can be obtained.

[0046] In a twentieth aspect of the present invention, in the third aspect of the present invention, The cover member has a fulcrum on the water side, When the expansion member expands, the pressure vessel is pushed by the expanded expansion member and rises upward toward the side opposite to the water.

[0047] According to the above configuration, the cover member does not hinder the expansion of the expansion member, and no action of opening the cover member is required.

[0048] In a twenty-first aspect of the present invention, in the third aspect of the present invention, The cover member is divided into two in the width direction of the expansion member, The cover member is divided into two parts, each of which has a fulcrum on the water side and the opposite side, The cover member divided into two parts is normally flat, The expansion member is configured to open like a double door when expanded.

[0049] With the above configuration, the mass of each cover member is reduced, making it easy to handle, and the cover member is automatically pushed up by the expansion member to open like a double door. Furthermore, since the height of the free end side of the cover member does not become too high when it expands, even if a person is left on the bridge side, they can straddle the cover member.

[0050] In a twenty-second aspect of the present invention, in the third aspect of the present invention, The cover member is configured to contact a surface of the expansion member and to support a load applied to the cover member by the expansion member.

[0051] According to the above configuration, there is no need for the cover member alone to support the vehicle's own weight, etc., so the cover member can be made lighter, and it is easier to ensure the height of the expansion member when inflated compared to a case where the cover member must support the water pressure acting on a heavy cover member.

[0052] In a twenty-third aspect of the present invention, in the third aspect of the present invention, The cover member is configured to be removable.

[0053] According to the above configuration, by removing the cover member before inflation, the inflatable member is not pushed by the cover member which receives water pressure when flooded.

[0054] In a twenty-fourth aspect of the present invention, in the third aspect of the present invention, The cover member covers the expansion member in the folded state but does not cover the mounting portion, The cover member and the mounting portion are configured to allow vehicles and people to pass over them.

[0055] According to the above-mentioned configuration, the size of the cover member can be reduced, and if the mounting portion is made to have high rigidity with few projections and recesses, vehicles can easily pass over it.

[0056] In a twenty-fifth aspect of the present invention, in the first or second aspect of the present invention, The expansion member is reinforced with a woven fabric.

[0057] According to the above-mentioned configuration, since it is reinforced with woven fabric, it can maintain its shape when high-pressure air is introduced and can withstand large water pressure.

[0058] In a twenty-sixth aspect of the present invention, in the first or second aspect of the present invention, The rigidity of the sheet member above the air chamber in the inflatable member is greater than the rigidity of the sheet member below the air chamber.

[0059] According to the above-mentioned configuration, since the rigidity of the upper side is high, the expansion member is prevented from floating up under normal conditions, and the occurrence of unevenness is prevented.

[0060] In a twenty-seventh aspect of the present invention, in the first or second aspect of the present invention, The thickness of the sheet member above the air chamber in the inflatable member is greater than the thickness of the sheet member below the air chamber.

[0061] According to the above-mentioned configuration, the upper side which faces the water when inflated is thick, so that the expansion member is less likely to break even if it is hit by wood or stones.

[0062] In a twenty-eighth aspect of the present invention, in the first or second aspect of the present invention, The inflatable member includes a sheet of ethylene propylene rubber.

[0063] According to the above-mentioned construction, the weather resistance and heat resistance are high, so that the deterioration does not occur even if it is exposed to direct sunlight for a long period of time.

[0064] In the twenty-ninth invention, A groove, protrusion or hollow portion extending in the longitudinal direction is provided on the inner surface of the expansion member, and the groove, protrusion or hollow portion is configured to guide the air in the expansion member to a hole portion that can communicate with the outside of the expansion member when exhausted.

[0065] According to the above configuration, when the expandable member returns from the expanded state to the flat state, air inside the expandable member is easily discharged to the outside of the expandable member through the grooves, the protrusions, or the hollow portions.

[0066] The flood prevention method of the 30th invention comprises: an expansion member installation process for recessing an expansion member installation recess that is deeper than the surface of the road by a predetermined depth in a section including a road that intersects with the embankment and leads to a bridge section, attaching an attachment part along the embankment to the water side of the expansion member installation recess, and fixing a base end of an expansion member made of a flat, folded, inflatable member having a flat surface to the attachment part; a cover member installation process in which a cover member step is recessed on the periphery of the expansion member installation recess to a depth approximately equal to the thickness of the plate-shaped cover member below the surface of the road, and the cover member is fixed to the cover member step in an openable and closable manner so that the cover member does not protrude above the surface of the road and covers at least the expansion member; and a flood prevention process for, when the water level rises, sending air into the inside of the expansion member body of the expansion member, causing it to inflate with its base end fixed to the mounting portion, thereby preventing the outflow of water whose water level has risen above the top surface of the embankment.

[0067] According to the above configuration, since at least the base end of the inflatable member in the flat folded state is fixed, the inflatable member can be easily attached. Moreover, since air is pumped into the inflatable member to inflate it, the time required is shorter than when liquid is pumped into it, and it is easy to return the inflated state to the flat folded state. Furthermore, since at least the base end of the inflatable member is fixed, the height of the inflatable member can be easily secured, and water outflow can be effectively prevented. Moreover, since the inflatable member is covered by the cover member, the inflatable member is less likely to be damaged and its durability is improved compared to when vehicles or the like pass directly over the inflatable member. Furthermore, since the cover member does not protrude from the surface of the road or passage, it does not interfere with the running of vehicles or the like. In addition, if the mounting portion is not covered by the cover member, the mounting portion may be shaped to have fewer projections and recesses so that vehicles and people can pass through it. The cover member may be removed before the inflatable member is inflated, or may be pushed up by the expanding inflatable member.

[0068] The flood prevention method of the 31st invention comprises: an expansion member installation process for recessing an expansion member installation recess that is deeper than the surface of the passage by a predetermined depth in a building or site having a passage leading to an entrance through which vehicles and people enter and exit, attaching an attachment part along the water side of the expansion member installation recess along the building or site, and fixing a base end of an expansion member made of a flat, folded, inflatable member having a flat surface to the attachment part; a cover member installation process in which a cover member step is recessed on the periphery of the expansion member installation recess to a depth approximately equal to the thickness of a plate-shaped cover member that is deeper than the surface of the passage, and the cover member is fixed to the cover member step in an openable and closable manner so that the cover member does not protrude beyond the surface of the passage and covers at least the expansion member; and a flood prevention process for, when the water level rises, sending air into the inside of the expansion member body of the expansion member, causing it to inflate with its base end fixed to the mounting portion, thereby preventing the outflow of water whose level has risen above the surface of the passage.

[0069] According to the above configuration, the building and site are waterproofed by expanding the expansion member when there is a risk of flooding of the sewer system due to river flooding or sudden rainfall. Normally, the mounting part to which the expansion member is attached in the passageway leading to the entrance does not protrude from the surface of the passageway, so that vehicles and people can pass over the mounting part and the expansion member. In addition, since the expansion member is covered by the cover member, the expansion member is less likely to be damaged and its durability is improved compared to when vehicles and the like pass directly over the expansion member. Furthermore, since the cover member does not protrude from the surface of the road or passageway, it does not interfere with the running of vehicles and the like. In addition, if the mounting part is not covered by the cover member, it is sufficient to make the mounting part have a shape with few projections and recesses so that vehicles and people can pass over it. The cover member may be removed before the expansion member is expanded, or may be pushed up by the expanding expansion member.

[0070] In a 32nd aspect of the present invention, in the 30th or 31st aspect of the present invention, In the expansion member installation step, the expansion member installation recess is recessed so that the periphery of the mounting portion is deep and the periphery of the expansion member is shallow, In the cover member installation step, the cover member is installed so that at least the weight of the cover member on the side opposite to the water is supported by the expansion member.

[0071] According to the above configuration, the weight of the cover member can be supported by the expansion member with a simple configuration, and since there is no need for the cover member alone to support the vehicle's weight, etc., the cover member can be made lighter, and it is easier to ensure the height of the expansion member when expanded compared to when it is necessary to support the water pressure applied to a heavy cover member. Effect of the Invention

[0072] As described above, according to the present invention, the mounting portion and the expansion member do not protrude above the surface of the embankment or site, making it easier for vehicles and people to pass over them and preventing flooding including the road portion over which the bridge is built and the areas around the passages leading to the site or building entrances. [Brief description of the drawings]

[0073] [Figure 1] FIG. 1 is a plan view showing a waterproof structure according to a first embodiment of the present invention in a folded state. [Figure 2A] FIG. 2 is an enlarged cross-sectional view taken along line IIA-IIA in FIG. [Figure 2B] FIG. 2B is an enlarged cross-sectional view of part IIB of FIG. 2A. [Figure 2C] FIG. 2B is an enlarged plan view corresponding to a portion IIB in FIG. 2A. [Diagram 3] FIG. 2B is a cross-sectional view equivalent to FIG. 2A when expanded. [Figure 4A] FIG. 2 is an enlarged cross-sectional view taken along line IVA-IVA in FIG. [Figure 4B] FIG. 4B is an enlarged cross-sectional view equivalent to FIG. 4A in the case of a removable cover member. [Figure 5A] FIG. 4B is a cross-sectional view equivalent to FIG. 4A when expanded. [Figure 5B] FIG. 5B is an enlarged cross-sectional view equivalent to FIG. 5A in the case of a removable cover member. [Figure 6] FIG. 2 is a diagram showing an outline of a blower system of a waterproof structure. [Figure 7] FIG. 11 is a plan view showing a waterproof structure according to a second embodiment of the present invention in a folded state. [Figure 8A] FIG. 8 is an enlarged cross-sectional view taken along line VIIIA-VIIIA in FIG. 7. [Figure 8B] 8B is an enlarged cross-sectional view corresponding to FIG. 8A, showing a modified example in which the shape of the mounting portion is different. FIG. [Figure 8C] FIG. 8B is an enlarged cross-sectional view of a road portion, equivalent to FIG. 8A. [Figure 8D] FIG. 8B is an enlarged cross-sectional view of a road portion. [Figure 9] FIG. 8B is a cross-sectional view equivalent to FIG. 8A when expanded. [Figure 10] FIG. 8 is an enlarged cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 11 is a cross-sectional view equivalent to FIG. 10 when expanded. [Figure 12] 13 is a plan view showing a connection portion cover that covers the connection portion and its surroundings. FIG. [Figure 13] FIG. 13 is an enlarged cross-sectional view taken along line XIII-XIII in FIG. [Figure 14] FIG. 14 is an enlarged cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] FIG. 11 is a perspective view showing a waterproof structure according to a third embodiment of the present invention in a folded state. [Figure 16A] 4 is an enlarged perspective view showing the expansion member and its surroundings in a folded state. FIG. [Figure 16B] 4 is an enlarged cross-sectional view showing the expansion member and its surroundings in a folded state. FIG. [Figure 17A] FIG. 16 is an enlarged cross-sectional view taken along line XVIIA-XVIIA of FIG. 15. [Figure 17B] 17B is an enlarged cross-sectional view taken along line XVIIB-XVIIB of FIG. 17A. [Figure 18] FIG. 11 is a perspective view showing an expanded state of a waterproof structure according to a third embodiment of the present invention. [Figure 19A] 19 is an enlarged perspective view showing the expansion member in an expanded state and its surroundings at part XIXA in FIG. 18. [Figure 19B] 19 is an enlarged cross-sectional view showing the expansion member in an expanded state and its surroundings at the portion XIXA in FIG. 18. [Figure 20A] 13 is an enlarged perspective view showing the expansion member and its surroundings in a folded state when there is no recess for installing the expansion member. FIG. [Figure 20B] 13 is an enlarged cross-sectional view showing the expansion member and its surroundings in a folded state when there is no recess for installing the expansion member. FIG. [Figure 20C] 13 is an enlarged cross-sectional view showing an expansion member and its surroundings in a folded state in another case where there is no recess for installing the expansion member. FIG. [Figure 20D] 13 is an enlarged cross-sectional view showing an expansion member and its surroundings in a folded state in yet another case in which there is no recess for installing the expansion member. FIG. [Figure 21A] 13 is an enlarged perspective view showing an expansion member and its surroundings in an expanded state when there is no recess for installing the expansion member; FIG. [Figure 21B] 13 is an enlarged cross-sectional view showing an expansion member and its surroundings in an expanded state when there is no recess for installing the expansion member. FIG. [Figure 22] 13 is a plan view showing a connection portion cover that covers the connection portion at the corner portion and its surroundings. FIG. [Figure 23] 23 is an enlarged cross-sectional view taken along line XXIII-XXIII of FIG. 22. [Figure 24] FIG. 11 is a plan view showing an expanded state of a waterproof structure according to a fourth embodiment of the present invention. [Diagram 25] 25 is an enlarged cross-sectional view taken along line XXV-XXV of FIG. 24. [Figure 26] 26 is an enlarged cross-sectional view taken along line XXVI-XXVI of FIG. 24. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0074] Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

[0075] (Embodiment 1) -Waterproof structure- 1 to 6 show a flood control structure 1 according to a first embodiment of the present invention, which includes an attachment portion 3 provided on a river embankment 10 so as to extend along the embankment 10. The attachment portion 3 may be provided in a straight line, or may be bent or curved in accordance with the river.

[0076] The term "levee" generally refers to a structure made of earth, stone, or concrete built along a riverbank, lakeshore, or coast to prevent river or lake flooding or the intrusion of seawater, but it also includes the wall of a bank that does not have an embankment, such as that of a small river flowing through an urban area.

[0077] In this embodiment, at least the embankment 10 is recessed with an expansion member installation recess 12 that is deeper than the upper surface 10a by a predetermined depth. Then, as shown in Figs. 2A and 3, a cover member step 13 is recessed from the upper surface 10a of the embankment 10 to the periphery of this expansion member installation recess 12, with a depth approximately equal to the thickness of the plate-shaped cover member 5. The cover member step 13 is formed so as to be parallel on the river side and the road R side. As a result, the depth of the expansion member installation recess 12 is slightly deeper than the combined depth of the thickness of the cover member 5 and the thickness of the mounting portion 3, and in this embodiment, the bottom surface 12a is approximately horizontal. The shape of the bottom surface 12a is not limited to this, as will be described later.

[0078] As shown enlarged in Fig. 2A and Fig. 3, the base end 2a of the expansion member 2 is fixed to the mounting part 3 so as to be sandwiched between the base end 2a and the bottom surface 12a of the recess 12 for installing the expansion member. The expansion member 2 can be changed in shape from the flat folded state shown in Fig. 1A to an expanded state (see Fig. 3) in which air is pumped into the inside, and in the expanded state, it is possible to prevent the outflow of water W at a water level higher than the upper surface 10a of the embankment 10. The shape of the mounting part 3 is not limited to this, but the mounting part 3 is fixed by an anchor bolt 4 to the river side of the recess 12 for installing the expansion member recessed in the upper surface 10a of the embankment 10. The mounting part 3 and the anchor bolt 4 are preferably made of stainless steel, which is resistant to rust. Although not shown, the mounting part 3 may be sandwiched by a receiving member and a pressing member, which have complementary irregularities.

[0079] In this embodiment, at least in the portion leading to the bridge portion B of the road R that intersects with the embankment 10, the mounting portion 3 does not protrude from the surface of the road R, and is configured so that vehicles can run on the mounting portion 3.

[0080] The expansion member 2 is made of a long rubber member that runs along the embankment 10. As shown in FIG. 2B, this rubber member is made of a multi-layer member and has a base end 2a and an expansion member body 2b that expands to have a curved surface. For example, two canvas layers 31 are covered with an inner cover rubber 32 and an outer cover rubber 33. The upper and lower members may have a release agent on the surface of the part that becomes the air chamber on the surface where the inner cover rubber 32 comes into contact so that they can easily separate when expanded.

[0081] The length of the base end 2a may be long, and there may be a plate-like non-inflatable portion between the mounting portion 3 and the expansion member main body 2b. Although not shown in detail, for example, the base end 2a at a predetermined position is provided with an intake port 2c for taking in air from a blower (shown only in FIG. 6). This configuration is not particularly limited, but this intake port 2c may be, for example, a cylindrical member, as long as it is in communication with the inside of the expansion member main body 2b (expansion section core body) in a sealed state.

[0082] 2B, the thickness t1 of the sheet members (external cover rubber 33, two canvas layers 31, and inner cover rubber 32) above the air chamber in the inflatable member 2 may be configured to be greater than the thickness t2 of the sheet members (external cover rubber 33, two canvas layers 31, and inner cover rubber 32) below the air chamber (t1>t2). With this configuration, the thickness t1 of the upper side that faces the water when inflated is thick, so that the inflatable member 2 is less likely to break even if it is hit by wood or stones.

[0083] In addition, the rigidity of the sheet members (external cover rubber 33, two canvas layers 31, and inner cover rubber 32) above the air chamber in the expansion member 2 may be configured to be greater than the rigidity of the sheet members (external cover rubber 33, two canvas layers 31, and inner cover rubber 32) below the air chamber. In this embodiment, the rigidity of the upper sheet members is increased by increasing the thickness of the upper outer cover rubber 33, but the rigidity may be increased by changing the material. By increasing the rigidity of the upper side, the expansion member is held down by its own weight and floats up under normal conditions, preventing the occurrence of unevenness.

[0084] The expansion member 2 may include a sheet of ethylene propylene rubber, which has high weather resistance and heat resistance and will not deteriorate even if exposed to direct sunlight for a long period of time.

[0085] The expansion member 2 may also be reinforced with woven fabric. By being reinforced with woven fabric, the expansion member 2 can maintain its shape when high-pressure air is introduced and can withstand large water pressure.

[0086] As shown in Figs. 2A and 4A, in the folded state, the expansion member 2 is stored in the expansion member installation recess 12 in the form of a plate with a substantially flat surface. In this embodiment, the mounting portion 3 and the entire expansion member 2 in the folded state are covered with a flat cover member 5 in a continuous longitudinal region including the bridge portion B of the road R intersecting with the embankment 10. The cover member 5 covering the expansion member 2 in the folded state does not protrude from the surface of the road R, allowing vehicles and people to pass over the cover member 5. The cover member 5 is preferably flat, but may have some unevenness. As in the second embodiment described later, the cover member 5 may be provided only in the portion including the bridge portion B of the road R intersecting with the embankment 10.

[0087] As shown in Fig. 1, the cover member 5 needs to have holes through which water can pass. This is to prevent water from pooling on the surface of the cover member 5 when folded, and to make it easier to release the water pressure of water flowing in from the river when inflated.

[0088] In this embodiment, the cover member 5 is made of a lattice-shaped grating member. A grating member has a large proportion of holes, allowing water to pass through easily, and is easy to obtain, making it possible to obtain a cover member 5 with high rigidity.

[0089] 3, the cover member 5 has a fulcrum (hinge portion 5a) on the water side of the mounting portion 3, and is configured to be pushed by the expanded member 2 when the member 2 expands, and to rise upward toward the land side. The hinge portion 5a is firmly fixed to the cover member step portion 13 by bolts (not shown) or the like.

[0090] In this embodiment, the cover member 5 does not hinder the expansion of the expansion member 2, and since it has a grating structure, it is not slippery.

[0091] 4A, a pipe material 7 as a hollow portion having a plurality of through holes may penetrate inside the expansion member 2. In this way, air inside the expansion member 2 can be easily discharged through the pipe material 7.

[0092] This hollow portion does not have to be a pipe material 7, and may be a groove portion (not shown) extending in the longitudinal direction of the expansion member 2. In short, the groove portion, protrusion portion, or hollow portion may be configured so that the air in the expansion member 2 during exhaust is guided to a hole portion (not shown) that can communicate with the outside of the expansion member 2 by the groove portion, protrusion portion, or hollow portion. The protrusion portion may be, for example, a string-shaped member arranged on the surface in a lattice pattern to form projections and recesses. This makes it easier for the air inside the expansion member 2 to be discharged to the outside of the expansion member through the groove portion, protrusion portion, or hollow portion when returning the expansion member from the expanded state to the flat state after use.

[0093] 12, a connecting portion 115 is provided to connect a plurality of expansion members 2 extending along the embankment 10. Since there is a limit to the maximum length of the expansion members 2 in manufacturing and transporting them, it is necessary to connect a plurality of expansion members 2 in a line in the longitudinal direction.

[0094] In this way, the expansion members 2 of a predetermined length can be connected to each other by the connecting parts 115, so that the expansion members 2 can be installed over long distances along the embankment 10. The shape of the connecting parts 115 is determined so as to ensure the passage of air through the communication pipes 2d, etc.

[0095] 12 to 14, for example, the connecting part 115 is made of a pair of metal plate-like members that sandwich the longitudinal ends of the expansion member 2 in the closed state and are fastened with bolts or the like to prevent air from leaking out of the expanded expansion member 2. By making the connecting part 115 out of a highly rigid metal plate in this way, the expansion member 2 is firmly connected.

[0096] As shown in FIG. 14, the connecting portion 115 is recessed, and is covered with a band-shaped connecting portion cover 116 to prevent water from entering through the recessed portion.

[0097] As shown in Figures 3 and 5, the expansion member 2 is configured to expand in an expanded state with the base end portion 2a fixed to the mounting portion 3, thereby preventing the outflow of water W from the river.

[0098] The flood control structure 1 of this embodiment has a blower system 20 shown in Fig. 6. This blower system 20 is provided, for example, on the upper surface 10a of the embankment 10 and includes a blower 21 driven by an electric motor, a switching valve 22 and a switching lever 23 for switching between supplying or exhausting air from the blower 21, a pressure gauge 24, an electric air supply valve 25, and a control panel 26 for controlling these. In an emergency, a supply hose 27 from the blower 21 is connected to an air intake 2c provided at a predetermined location on the base end 2a of the expansion member 2.

[0099] A control panel 26 may monitor the pressure gauge 24 and automatically adjust the blower 21 to maintain a constant pressure.

[0100] Although not shown, a vacuum pump may be further provided to forcibly remove the air in the membrane of the expansion member 2 when the risk of flooding is eliminated. By creating a negative pressure with the vacuum pump rather than opening to the atmosphere, the upper and lower sheets of the membrane can be brought into close contact with each other, returning the expansion member 2 to a flat state. At this time, the air is efficiently exhausted by the hollow portion and the groove portion described above.

[0101] The control panel 26 may be equipped with a receiver 28 capable of receiving official disaster danger information. In this way, when disaster danger information is issued, the blower 21 can be automatically switched on to inflate the expansive member 2 and create a waterproof wall.

[0102] The control panel 26 may monitor the water level of a river or the like using a sensor and / or camera 29, and when a desired water level is reached, the blower 21 may be automatically switched on to inflate the expansion member 2 and create a waterproof wall.

[0103] A camera 29 may be provided to photograph the upper surface of the expansion member 2, and after confirming that no one is on the expansion member 2, the control panel 26 may switch on the blower 21 to inflate the expansion member 2 and create a waterproof wall.

[0104] Before the control panel 26 switches on the blower 21, a buzzer or speaker 30 provided near the expansion member 2 may generate an alarm or the like.

[0105] -Waterproofing method- Next, a flood prevention method according to this embodiment will be described.

[0106] First, in the expansion member installation process, as shown in Fig. 1, Fig. 2A and Fig. 4A, an expansion member installation recess 12 is recessed on the road R side of the fence 11 of the river embankment 10, and the recess 12 is deeper than the upper surface 10a by a predetermined depth. The mounting part 3 is attached along the embankment 10 on the water side of the expansion member installation recess 12, and the base end 2a of the expansion member 2 is fixed by the mounting part 3. Specifically, as shown in Fig. 2A and Fig. 4A, the expansion member installation recess 12 is recessed at a predetermined distance from the riverside in the embankment 10 made of an existing or new concrete structure, etc., and the expansion member 2 in the folded state is placed in the expansion member installation recess 12, the mounting part 3 is placed on the base end 2a, and the anchor bolt 4 is tightened. Although not shown, it is desirable to provide a drainage hole or the like in an appropriate position of the expansion member installation recess 12 so that water does not accumulate.

[0107] Next, in the cover member installation process, a cover member step 13 is recessed around the periphery of the expansion member installation recess 12 so as to be deeper than the upper surface of the embankment 10 by approximately the same amount as the thickness of the plate-shaped cover member 5. The cover member step 13 may be provided together with the expansion member installation recess 12. Then, the hinge portion 5a of the cover member 5 is fixed to the river side of the cover member step 13, and the cover member 5 covers the expansion member 2 so as not to protrude beyond the upper surface 10a of the embankment 10. The side of the cover member 5 opposite the hinge portion 5a rests on the cover member step 13 on the road R side. In this state, the cover member 5 has enough rigidity to support the weight of a vehicle or the like.

[0108] In this way, during normal times as shown in Figure 4A, vehicles and the like pass over the cover member 5 to travel across the bridge section B, so the expansion member 2 is less susceptible to damage and its durability is improved compared to when vehicles and the like pass directly over the expansion member 2. In addition, because the cover member 5 does not protrude from the surface of the road R, it does not interfere with the travel of vehicles and the like.

[0109] Next, in the flood prevention process, when the water level of the river rises, air is sent into the interior of the expansion member 2 from the intake port 2c, as shown in Fig. 6. Specifically, after connecting the supply hose 27 from the blower 21 to the air intake port 2c of the expansion member 2, the control panel 26 is operated to start the blower 21 and send air into the expansion member main body 2b.

[0110] 3, the expansion member body 2b of the expansion member 2 inflates with the base end 2a fixed to the mounting part 3, pushing up the cover member 5. Since the cover member 5 is made of a grating member having many holes, the cover member 5 is not too heavy, and the cover member 5 is not subjected to excessive water pressure from water flowing in from the river.

[0111] If the water level rises further, the expansion member body 2b in the expanded state prevents the outflow of water W whose level has risen above the upper surface 10a of the embankment 10. In this state, the expansion member 2 expands with the base end 2a firmly fixed, so a fence solely for supporting the expansion member 2 is not necessary, and the strength can be increased, making it easier to ensure the height.

[0112] In this way, the expansion member 2 of this embodiment can be expanded by pumping air into it, which takes less time than pumping liquid into it, and even when it is folded again, hollow parts and grooves such as the pipe material 7 are provided inside the expansion member 2, so it is easy to return it from the expanded state to a flat state.

[0113] Furthermore, since the mounting portion 3 is hidden under the cover member 5 and is installed so as not to protrude above the surface of the road R, even if it is installed in front of a bridge, it does not interfere with vehicle travel.

[0114] Therefore, according to the flood control structure 1 of this embodiment, it is possible to effectively prevent flooding including the road portion over which the bridge section B is built.

[0115] -Variations- 4B and 5B show a case where the cover member 5 is not attached so as to be openable and closable by the hinge portion 5a but is removable.

[0116] In this modified example, when flooded, it is necessary to lift and remove the cover member 5 before inflating the expansion member 2, but removing it has the advantage that the expansion member will not be pushed by the cover member which receives water pressure when flooded. Also, there is no need to make the cover member into a water-permeable shape such as a grating, and it can be made into a simple plate-like member without holes.

[0117] For example, one idea is to use the cover member as a waterproof wall, but this would result in a heavy and thick waterproof wall because a large water pressure would be applied to the waterproof wall, and even if air is pumped into the expansion member, the dam height would be low. In order to increase the dam height, very high air pressure is required, which would apply excessive force to the expansion member and make it prone to damage. To prevent damage, the expansion member must be made high-strength and thick, which has the disadvantage of being very heavy and expensive.

[0118] Moreover, constructing a waterproof wall over a long distance along a river is not realistic because it requires covering members over a long distance. A waterproof wall made of multiple covering members has the disadvantage that it is difficult to seal between the covering members, and water leaks through the gaps in the waterproof wall, resulting in insufficient waterproofing.

[0119] In this modification, the cover member 5 is removable and the expansion member 2 alone forms a waterproof wall, so the above-mentioned drawbacks do not occur. Note that in any of the embodiments, the cover member may be removable rather than supported so as to be openable and closable by a hinge portion.

[0120] (Embodiment 2) 7 to 11 show a waterproof structure 101 according to a second embodiment of the present invention, which differs from the first embodiment in particular in the configurations of cover members 105, 106. In the following embodiment, the same parts as those in Figs. 1 to 6 are given the same reference numerals and detailed description thereof will be omitted.

[0121] As shown in Figs. 8A, 8C, and 9 to 11, the expansion member installation recess 112 of this embodiment is recessed so that its depth gradually decreases from the water side (river side) toward the opposite side.

[0122] In this embodiment, the cover members 105, 106 are provided only on the road R portion leading to the bridge portion B, and the cover members 105, 106 are not provided on other portions. The cover members 105, 106 are not necessarily required on other portions, especially when vehicles do not pass through frequently.

[0123] As shown in Figures 10 and 11, a cover member step 113 is recessed on the river side of the expansion member installation recess 112 where the cover members 105, 106 are provided. A cover member step 113 is also recessed on the side opposite the shallow river, but the expansion member installation recess 112 may also serve as the cover member step 113. The cover members 105, 106 are divided into two in the width direction of the expansion member 2. The two divided cover members 105, 106 each have a fulcrum (hinge portions 105a, 106a) on the water side and the land side, and the hinge portions 105a, 106a are fixed by the cover member step 113.

[0124] As shown in FIG. 10, the two divided cover members 105 and 106 are normally flat, and as shown in FIG. 11, are configured to open like double doors when the expansion member 2 is expanded.

[0125] As shown in Figure 10, the cross section of the recess 112 for installing the expansion member is formed so as to gradually become shallower away from the river, and the undersides of the cover members 105, 106 are configured to contact the surface of the expansion member 2 and to support the load applied to the cover members 105, 106 by the expansion member 2.

[0126] In this embodiment, as shown in Fig. 8A, in the portion where there are no cover members 105, 106, the mounting portion 3 is sealed with a three-dimensional rubber sheet cover 114 as a mounting portion cover so as to fill any gaps. In this way, the mounting portion 3 is covered without any gaps with the three-dimensional rubber sheet cover 114, so that it is reliably protected and is unlikely to get in the way when the vehicle or the like is traveling. The mounting portion cover does not have to be made of rubber, and may be made of resin or the like.

[0127] As shown in FIG. 8C, even on the road leading to the bridge portion B, a cover member may not be provided as shown in FIG. 8A, allowing vehicles and people to pass through.

[0128] -Waterproofing method- Next, a flood prevention method according to this embodiment will be described.

[0129] First, in the expansion member installation step, the expansion member installation recess 112 is recessed so that its depth gradually decreases from the water side to the opposite side, as shown in Fig. 9. As described above, it is sufficient that at least the expansion member installation recess 112 is formed so that it is deep around the mounting portion 3 and shallow around the expansion member 2.

[0130] 11, in the cover member installation process, cover member steps 113 are recessed on the river side and land side of the expansion member installation recess 112. The cover members 105, 106 are installed so that the weight of the side of the cover member 105 opposite to the water and the weight of the cover member 106 on the river side are supported from below by the expansion member 2.

[0131] The hinge portion 105a of the cover member 105 on the river side is fixed to the cover member step portion 113 on the river side, and the hinge portion 106a of the cover member 106 on the road R side is fixed to the cover member step portion 113 on the road R side.

[0132] In areas not covered by the cover members 105, 106, the unevenness of the mounting portion 3 would be exposed if left as is, but as shown in Fig. 8A, the mounting portion 3 is covered with a rubber sheet cover 114 that matches the unevenness. This improves the appearance and prevents water from accumulating around the mounting portion 3, making it less likely to deteriorate. If there is not much vehicle traffic, the expansion member installation recess 112 may not be formed and the expansion member 2 and mounting portion 3 may protrude slightly from the upper surface 10a of the embankment 10, as shown in Figs. 20A to 21B described below.

[0133] In particular, it is desirable to provide an anti-slip structure on the portion of the expansion member 2 that is the upper surface in the folded state, which is not covered by the cover members 105, 106. This allows people, motorcycles, etc. to pass through safely without slipping.

[0134] 2B and 2C, the anti-slip structure is configured with an uneven surface including rectangular convex portions 34 and concave portions 35 surrounding them. This makes it possible to obtain an anti-slip effect with a simple configuration.

[0135] It is preferable that the recesses 35 in the uneven surface serve as drainage grooves, so that water does not accumulate on the surface of the expandable member 2, and the slip prevention effect is improved, making it easier to travel.

[0136] It is desirable that the recess 35 serving as a drainage groove crosses the entire width of the expansive member 2. In this way, water on the surface of the expansive member 2 can be easily drained to the outside of the expansive member 2.

[0137] The recesses 35 serving as drainage grooves may intersect in the lengthwise and widthwise directions of the expansive member 2. In this way, water on the surface of the expansive member 2 can be more effectively drained out of the expansive member 2.

[0138] Although not shown, the drainage groove may have a woven structure, which provides a higher anti-slip effect.

[0139] Then, as in the first embodiment, in the flood prevention process, when the water level of the river rises, air is sent into the interior of the expansion member 2 from the intake port 2c as shown in Fig. 6. The operation thereafter is the same as in the first embodiment except that only the cover members 105, 106 provided on the road R portion open like a double door, so a detailed description will be omitted. Note that, as shown in Fig. 9, the side of the rubber sheet cover 114 opposite the river deforms together with the expansion member 2, so the expansion of the expansion member 2 is not hindered.

[0140] In this manner, in this embodiment, with a simple configuration, the weight of the cover members 105, 106 can be supported by the expansion member 2, and since there is no need for the cover members 105, 106 alone to support the vehicle's weight, etc., the cover members 105, 106 can be made lighter, and it is easier to ensure the height of the expansion member 2 when expanded compared to the case where the water pressure acting on the heavy cover members 105, 106 must be supported.

[0141] In this embodiment, the mass of each of the two divided cover members 105, 106 is reduced, and the height of the free ends of the cover members 105, 106 when inflated is not too high. Therefore, even if a person is left behind on the bridge B side, the person can straddle the cover members 105, 106.

[0142] As described above, according to this embodiment, the mounting portion 3 and the expansion member 2 do not protrude beyond the upper surface 10a of the embankment 10, making it easier to travel on it and preventing flooding, including the portion of the road R over which the bridge is built.

[0143] Therefore, according to this embodiment, in areas where bridge section B is located and where automobiles pass, the expansion member 2 is covered by the cover members 105, 106 to allow vehicles to pass, whereas in areas other than bridge section B, where vehicles do not pass, the cover members 105, 106 can be omitted and instead the mounting portion 3 is covered by the rubber sheet cover 114, so that the mounting portion 3 does not get in the way.

[0144] -Variations- The recess 112 for installing the expansion member is not limited to the inclined cross-section shown in Figure 8A, but may be formed so that the recess 112' for installing the expansion member is deep around the mounting portion 103' and shallow around the expansion member 2, as shown in Figure 8B.

[0145] In this case, for example, the shape of the mounting portion 103' itself may be shaped to reduce the unevenness of the expansion member installation recess 112'.

[0146] Even in the case of this modified example, the mounting portion 103' and the expansion member 2 do not protrude from the surface 10a of the embankment 10, so they do not interfere with the passage of people, bicycles, etc. passing along the embankment.

[0147] Naturally, as shown in FIG. 8D, the road R leading to the bridge B may also be configured in the same manner as in this modified example.

[0148] (Embodiment 3) 12 to 14 show the third embodiment of the present invention, and in particular the connecting portion 115 of the expansion member 2 will be described in detail, but this connecting portion 115 can be applied to both the first and second embodiments.

[0149] That is, the expansion members 2 connected in the longitudinal direction are connected so as to be sandwiched in a closed state by the connecting parts 115 made of metal fittings or the like. Then, as shown in Fig. 14, that part has a concave shape, which makes it easier for water to enter.

[0150] For this reason, in this embodiment, the connecting part 115 is covered with a band-shaped connecting part cover 116 made of rubber or the like. The base end side of the connecting part cover 116 is attached to the expansion member installation recess 112 by a connecting part cover attachment part 117 similar to the attachment part 3. With this configuration, as shown in Fig. 13, approaching water is prevented from flowing in through the connecting part 115 and its surroundings.

[0151] (Embodiment 4) 15 to 21B show a waterproof structure 201 according to a fourth embodiment of the present invention, which differs from the first and second embodiments in that the object to be protected is a building P and its site A.

[0152] As shown in Fig. 15, a building P or a site A has an entrance / exit D through which vehicles and people enter and exit, and a passageway G leading to the entrance / exit D is used by vehicles and people. As shown in Figs. 16A to 17B, in this embodiment, in the portion other than the passageway G leading to the entrance / exit D, the mounting part 3 is housed in an expansion member installation recess 212 formed on the upper surface of the site A (passageway G) and does not protrude above the surface of the site A, so that vehicles and people can pass over the mounting part 3 and the expansion member 202 housed in the expansion member installation recess 212.

[0153] 17A and 17B, in this embodiment, at least in the passage G portion leading to the entrance / exit D, the mounting portion 3 and the entire expansion member 202 in the folded state are covered with the cover member 5, and the cover member 5 covering the expansion member 2 in the folded state does not protrude from the surface of the site A (passage G), allowing vehicles and people to pass over the cover member 5. It is preferable that the cover member 5 is flat, but some unevenness is acceptable, especially when there is little traffic of cars and people.

[0154] In this embodiment, the inflatable member 202 is not covered by the cover member 5 in the areas other than the passage G, but the inflatable member 202 may be configured to be covered by the cover member in areas where it is necessary for people or vehicles to pass through.

[0155] 16A and 16B, most of the circumference not covered by the cover member 5 exposes the expansion member 202 and the attachment portion 3, but it is preferable that the expansion member 202 before expansion is housed in the expansion member installation recess 212. In this case, as shown in FIG. 16B, the attachment portion 3 may protrude slightly from the surface of the expansion member 202.

[0156] Furthermore, in areas other than the passageway G, if there is not much vehicle traffic, the recess 212 for installing the expansion member may not be formed, and the expansion member 202 and the mounting portion 3 may protrude above the top surface of the site A, as shown in Figures 20A to 21B.

[0157] Naturally, in cases where pedestrians and bicycles are the main users and heavy vehicles rarely pass through, a configuration in which no expansion member installation recess 212 is formed, as shown in Figures 20A to 21B, may be acceptable even in the passage G portion.

[0158] In this case, for example, as shown in Fig. 20C, the end of the expansion member 202 can be covered with a mounting member 203' so as to be smooth. Similarly, the opposite end can be covered with a tip fixing member 208' that can open around a hinge portion 205' when the expansion member 202 is expanded.

[0159] Also, as shown in FIG. 20D, for example, mounting member installation recess 212'' may be recessed, and the base end of expansion member 202'' may be sandwiched against the bottom surface, and then covered with mounting member 203'' to create a smooth surface for vehicles to pass through. In this case as well, the opposite end may be covered with tip fixing member 208' that can open around hinge portion 205' when expansion member 202 is expanded.

[0160] Although not shown, the periphery of the building P and site A is often covered with block walls or the like, in which case it is sufficient to cover only the parts that are not covered with block walls or the like with the expansion member 202. Also, when it is desired to cover a large site A with a waterproof wall, there may be differences in the height of the site A. In this case, it is sufficient to cover only the low parts of the site A that are expected to be flooded with the expansion member 202.

[0161] In order to protect the building P and its site A, as shown in Figures 22 and 23, the expansion member 202 is connected in a bent state at a certain angle (90° in this embodiment).

[0162] As shown in Fig. 22, the connecting portion 115 of the expansion member 2 covering the corner of the site A connects a pair of intersecting expansion members 202 at, for example, 90°, and at least the upper side thereof is covered by a connecting portion cover 116. As also shown in Fig. 23, the base end side of the connecting portion cover 116 is fixed to the surface of the site A by a connecting portion cover mounting portion 117. Therefore, as in the above-mentioned embodiment 3, when the expansion member 202 expands, the connecting portion cover 116 also rises up, so that it is possible to block water that tries to flow in.

[0163] In this manner, in this embodiment, under normal circumstances, the mounting portion 3 for mounting the expansion member 202 does not protrude above the surface of the site A, at least in the passageway G through which vehicles and people pass, so that vehicles and people can pass over the mounting portion 3 and the expansion member 202.

[0164] In this embodiment, too, in the passage G portion where cars and people frequently pass, the expansion member 202 is covered with the cover member 5, so the expansion member 202 is less likely to be damaged and its durability is improved compared to when vehicles, etc. pass directly over the expansion member 202. In addition, since the cover member 5 does not protrude from the surface of the site A, it does not interfere with the travel of vehicles, etc.

[0165] When there is a risk of inland flooding of the sewer system due to river flooding or sudden rainfall, the building P and site A are waterproofed by expanding the expansion member 202 as shown in Figs. 18 to 19B.

[0166] In this embodiment, as shown in Figures 22 and 23, the expansion member 202 is properly connected at the corners of the site A, so that by expanding the expansion member 202, water does not flow into the corners of the building P or the site A.

[0167] In this manner, even in this embodiment, the mounting portion 3 and the expansion member 202 do not protrude above the surface of the site A, making it easy for vehicles and people to pass over them, and flooding can be effectively prevented, including in the passage G leading to the entrance / exit.

[0168] (Embodiment 5) 24 and 25 show a waterproof structure 301 according to a fifth embodiment of the present invention, which differs from the above-described embodiments in that, when inflated, the cross-sectional area of ​​the expansion members 302 is maintained, in other words, they are not closed but are connected to each other by the belt-shaped members 316.

[0169] The connecting portion is constituted by a strip-shaped member 316, and the strip-shaped member is bonded in a state in which it straddles and covers the longitudinal ends of adjacent expansion members 302, thereby connecting the expansion members 302.

[0170] In this embodiment, the expansion member 302 is not closed at the connecting portion 115 as in the above-described embodiments, and therefore, as shown in Fig. 25, changes in the cross section of the expansion member 302 are suppressed at the connecting portion by the strip-shaped member 316. Note that, in any of the embodiments, as shown in Fig. 26, the mating surface of the expansion member 302 may not have air therein and the plate-shaped portion may protrude.

[0171] In this manner, in this embodiment, by connecting adjacent expansion members 302 in the longitudinal direction with the band-shaped member 316, the cross-sections of the expansion members 302 when expanded at the connecting portions can be maintained almost uniform, making it difficult for water to flow in at the connecting portions.

[0172] In this embodiment, the mounting portion 3 and the expansion member 302 are housed in the expansion member installation recess 312, so that they do not protrude from the surrounding area, allowing easy passage of vehicles and people. As described above, the mounting portion 3 may be covered with the cover members 5, 105, 106 or the rubber sheet cover 114.

[0173] (Other embodiments) The present invention may be configured as follows with respect to the above embodiment.

[0174] In the above embodiments, the cover member covers not only the expansion member but also the mounting portion, but it may cover only the expansion member without covering the mounting portion. In this case, the size of the cover member can be reduced. In this case, if the mounting portion is made of a material with few irregularities and high rigidity, vehicles and people can pass over the cover member and the mounting portion.

[0175] In each of the above-described embodiments, the mounting portion 3 shown in Fig. 2A etc. is provided. Although not shown in detail, a mounting portion may be provided in which the base end of the expansion member around which a rod is wound is sandwiched between a receiving member and a pressing member inserted into the anchor bolt. In this case, the rod-shaped rod is less likely to deform than a rubber member, so that the base end is less likely to come off when a tensile load is applied.

[0176] In the above embodiment 1, the target is river flooding, but if the flood control structure 1,101 is installed on a levee (including a seawall) facing a lake or the sea, it can of course also be applied to protection against small-scale tsunamis, high waves caused by typhoons, high tides, etc.

[0177] In the above embodiment, the expansion members 2, 202, 302 are rubber members, but as long as they are foldable and have a certain degree of rigidity, they may be expansion members such as PVC sheets, tarpaulins, etc.

[0178] The expansion members 2, 202, 302 may have a pattern on the surface to improve their appearance both when stored and when inflated.

[0179] 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. [Explanation of symbols]

[0180] 1. Water-resistant structure 2 Expansion member 2a Proximal end 2b Expansion member body 2c Air intake 2d Connecting pipe 3 Mounting part 4 Anchor bolts 5 Cover member 5a Hinge part 7 Pipe material 10. Levee 10a top surface 11. Fence 12 Recess for installation of expansion member 12a Bottom 13 Cover member step 20 Blower System 21 Blower 22 Switching valve 23 Switching lever 24 Pressure gauge 25 Electric air supply valve 26 Control Panel 27 Supply hose 31 Canvas layer 32 Inner cover rubber 33 Outer cover rubber 101 Water-resistant structure 103' Mounting part 105, 106 Cover member 105a, 106a Hinge part 112, 112' Recess for installing expansion member 113 Cover member step 114 Rubber sheet cover (mounting cover) 115 Connection part 116 Connection cover 117 Connection cover mounting part 201 Waterproof structure 202,202'' Expansion member 203', 203'' Mounting parts 205' Hinge section 208' Tip fixing member 212,212'' Recess for installation of expansion member 301 Waterproof structure 302 Expansion member 312 Recess for installation of expansion member 316 Belt-shaped members Site A B Bridge section D Entrance / Exit G aisle R Road W Water

Claims

1. An attachment section provided along the embankment; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by pumping air into it, and in the expanded state, contacting water whose level has risen above the top surface of the embankment to prevent the water from flowing out; The expansion member is a longitudinal inflatable member extending along said bank; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least a portion including a road that intersects with the embankment and leads to a bridge portion, the mounting portion is accommodated in a recess for installing an expansion member formed on the upper surface of the road and does not protrude from the surface of the road, and vehicles and people can pass over the mounting portion and the expansion member accommodated in the recess for installing the expansion member. A waterproof structure characterized by:

2. A mounting portion provided along a building or site having a passageway leading to an entrance and exit for vehicles and people; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by supplying air thereinto, and contacting water at a raised water level in the expanded state to prevent the water from flowing out; The expansion member is a length of inflatable member along the building or site; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least a portion including the passage leading to the entrance / exit, the mounting portion is accommodated in an expansion member installation recess formed on the upper surface of the passage and does not protrude from the surface of the passage, and vehicles and people can pass over the mounting portion and the expansion member accommodated in the expansion member installation recess. A waterproof structure characterized by:

3. In at least a portion including a road intersecting the embankment and leading to a bridge portion or at least a portion including a passage leading to an entrance / exit, the inflatable member in at least a folded state is covered with a cover member, and the cover member covering the inflatable member in the folded state does not protrude from the surface of the road or the passage, and is configured to allow vehicles and people to pass over the cover member. A waterproof structure according to claim 1 or 2.

4. The recess for installing the expansion member is formed so that the periphery of the mounting portion is deep and the periphery of the expansion member is shallow. A waterproof structure according to claim 1 or 2.

5. The mounting portion is covered with a three-dimensional mounting portion cover so as to fill a gap inside the expansion member installation recess, and vehicles and people can pass over the mounting portion cover and the expansion member.

5. The waterproof structure according to claim 4.

6. The expansion members each have a connecting portion at a longitudinal end thereof.

3. A waterproof structure according to claim 1 or 2.

7. The connecting portion is made of a plurality of metal plates, and the longitudinal ends of the plurality of expansion members are sandwiched between the plurality of metal plates. The connecting portion is covered with a connecting portion cover to reduce unevenness and prevent water from leaking out of the connecting portion.

7. A waterproof structure according to claim 6.

8. A communication pipe is provided inside the connecting portion and extends in the longitudinal direction, and the expansion members adjacent in the longitudinal direction communicate with each other.

7. A waterproof structure according to claim 6.

9. At the connecting portion, the longitudinal ends of the expansion member are connected in a sealed state.

7. A waterproof structure according to claim 6.

10. The connecting portion is formed of a strip-shaped member, and the strip-shaped member is bonded to the adjacent expansion members in a state in which the strip-shaped member covers the longitudinal ends of the adjacent expansion members so as to straddle the longitudinal ends of the adjacent expansion members, thereby connecting the expansion members.

7. A waterproof structure according to claim 6.

11. A plurality of the expansion members are connected even at the corners of the building or site.

3. The waterproof structure according to claim 2.

12. The portion of the expansion member that becomes the upper surface in the folded state is provided with an anti-slip structure.

3. A waterproof structure according to claim 1 or 2.

13. The anti-slip structure has an uneven surface.

13. A waterproof structure according to claim 12.

14. The uneven surface serves as a drainage groove.

14. A waterproof structure according to claim 13.

15. The drainage groove traverses the entire width of the expansion member.

15. A waterproof structure according to claim 14.

16. The drainage grooves cross the length and width of the expansion member.

15. A waterproof structure according to claim 14.

17. The drainage groove has a woven structure.

15. A waterproof structure according to claim 14.

18. The cover member has holes through which water can pass.

4. The waterproof structure according to claim 3.

19. The cover member is made of a grating member.

20. A waterproof structure according to claim 18.

20. The cover member has a fulcrum on the water side, When the inflatable member is inflated, the inflatable member is pushed by the inflated inflatable member and rises upward toward the opposite side to the water.

4. The waterproof structure according to claim 3.

21. The cover member is divided into two in the width direction of the expansion member, The cover member is divided into two parts, each of which has a fulcrum on the water side and the opposite side, The cover member divided into two parts is normally flat, The expansion member is configured to open like a double door when expanded.

4. The waterproof structure according to claim 3.

22. The cover member is configured to contact a surface of the expansion member and to support a load applied to the cover member by the expansion member.

4. The waterproof structure according to claim 3.

23. The cover member is configured to be removable.

4. The waterproof structure according to claim 3.

24. The cover member covers the expansion member in the folded state but does not cover the mounting portion, The cover member and the mounting portion are configured to allow vehicles and people to pass over them.

4. The waterproof structure according to claim 3.

25. The expansion member is reinforced with a woven fabric.

3. A waterproof structure according to claim 1 or 2.

26. The rigidity of the sheet member above the air chamber in the inflatable member is greater than the rigidity of the sheet member below the air chamber.

3. A waterproof structure according to claim 1 or 2.

27. The thickness of the sheet member above the air chamber in the inflatable member is greater than the thickness of the sheet member below the air chamber.

3. A waterproof structure according to claim 1 or 2.

28. The inflatable member includes a sheet of ethylene propylene rubber.

3. A waterproof structure according to claim 1 or 2.

29. A groove, a protrusion or a hollow portion extending in the longitudinal direction is provided on the inner surface of the expansion member, and the air in the expansion member is guided to a hole portion that can communicate with the outside of the expansion member by the groove, the protrusion or the hollow portion when exhausted.

3. A waterproof structure according to claim 1 or 2.

30. an expansion member installation process for recessing an expansion member installation recess that is deeper than the surface of the road by a predetermined depth in a section including a road that intersects with the embankment and leads to a bridge section, attaching an attachment part along the embankment to the water side of the expansion member installation recess, and fixing a base end of an expansion member made of a flat, folded, inflatable member having a flat surface to the attachment part; a cover member installation process in which a cover member step is recessed on the periphery of the expansion member installation recess to a depth approximately equal to the thickness of the plate-shaped cover member below the surface of the road, and the cover member is fixed to the cover member step in an openable and closable manner so that the cover member does not protrude above the surface of the road and covers at least the expansion member; and a flood prevention process for, when the water level rises, sending air into the inside of the expansion member body of the expansion member, inflating the expansion member with the base end fixed to the mounting part, and contacting the water whose level has risen above the upper surface of the embankment to prevent the water from flowing out. A waterproofing method comprising:

31. an expansion member installation process for recessing an expansion member installation recess that is deeper than the surface of the passage by a predetermined depth in a building or site having a passage leading to an entrance through which vehicles and people enter and exit, attaching an attachment part along the water side of the expansion member installation recess along the building or site, and fixing a base end of an expansion member made of a flat, folded, inflatable member having a flat surface to the attachment part; a cover member installation process in which a cover member step is recessed on the periphery of the expansion member installation recess to a depth approximately equal to the thickness of a plate-shaped cover member that is deeper than the surface of the passage, and the cover member is fixed to the cover member step in an openable and closable manner so that the cover member does not protrude beyond the surface of the passage and covers at least the expansion member; and a flood prevention step of, when the water level rises, feeding air into the inside of the expansion member body of the expansion member, causing the expansion member to expand with the base end fixed to the mounting part, and contacting water whose level has risen above the surface of the passage to prevent the water from flowing out. A waterproofing method comprising:

32. In the expansion member installation step, the expansion member installation recess is recessed so that the periphery of the mounting portion is deep and the periphery of the expansion member is shallow, In the cover member installation step, the cover member is installed so that at least the weight of the cover member on the side opposite to the water is supported by the expansion member.

32. The method for flood prevention according to claim 30 or 31.

33. A mounting portion provided along a levee; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by pumping air into it, and in the expanded state, contacting water whose level has risen above the top surface of the embankment to prevent the water from flowing out; The expansion member is a longitudinal inflatable member extending along said bank; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least a portion including a road that intersects with the embankment and leads to a bridge portion, the mounting portion is formed without any step on the surface of the flat, plate-like expansion member in the folded state, and is configured so that vehicles and people can pass over the mounting portion and the expansion member. A waterproof structure characterized by:

34. A mounting portion provided along a building or site having a passageway leading to an entrance and exit for vehicles and people; an expansion member having a base end fixed to one side of the mounting portion, capable of changing its shape from a flat folded state to an expanded state by supplying air thereinto, and contacting water at a raised water level in the expanded state to prevent the water from flowing out; The expansion member is a length of inflatable member along the building or site; The base end portion, an expansion member body that is continuous with the base end portion and is filled with air in the expanded state to expand so as to have a curved surface; In the folded state, the surface is flat and plate-like, In at least a portion including a passageway leading to the entrance, the mounting portion is formed without any step on the surface of the flat, plate-like inflatable member in the folded state, and vehicles and people can pass over the mounting portion and the inflatable member. A waterproof structure characterized by:

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