Water stop structure

Abstract

To suppress water infiltration into the inside of a water cut-off wall without increasing the height of the water cut-off wall.SOLUTION: A water cut-off structure includes a water cut-off wall 10, and a water flow return part 24 which is provided at an upper part of the water cut-off wall 10 via a rotary shaft 34 extending in a widthwise direction of the water cut-off wall 10, and which is shifted between a standby state of facing an outer wall surface 10B of the water cut-off wall 10 and a developed state of projecting outward from the upper part of the water cut-off wall 10 in accordance with rotation around the rotary shaft 34.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a water stopping structure. [Background technology]

[0002] BACKGROUND ART Wave-reflecting members that are attached to existing dikes and receive waves are known (see, for example, Patent Documents 1 and 2).

[0003] Also known is a movable tsunami buffer weir that is installed in a river and rotates due to a tsunami to close a breakwater (see, for example, Patent Document 3).

[0004] Furthermore, a water inundation prevention unit is known that is provided in a seismic isolation layer and rotates due to buoyancy when flooded, thereby blocking the seismic isolation layer (see, for example, Patent Document 4). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-109241 [Patent Document 2] Japanese Patent Application Laid-Open No. 2009-108565 [Patent Document 3] Japanese Patent Application Laid-Open No. 2014-202065 [Patent Document 4] Japanese Patent Application Laid-Open No. 2018-178490 Summary of the Invention [Problem to be solved by the invention]

[0006] The height of water-cutting walls such as seawalls is set based on the inundation depth during floods, inland flooding, and other water damages set by the national or local government, for example.

[0007] However, even if the water depth does not reach the height of the water cutoff wall during a flood, the water flow may overflow the water cutoff wall and cause flooding inside the wall.

[0008] One possible solution to this problem is to increase the height of the water blocking wall, but increasing the height of the water blocking wall is time-consuming.

[0009] In consideration of the above, the present invention aims to prevent water from entering inside a water blocking wall without increasing the height of the water blocking wall. [Means for solving the problem]

[0010] The water-stopping structure described in claim 1 comprises a water-stopping wall and a water flow deflector that is provided on the upper part of the water-stopping wall via a rotation axis that extends in the width direction of the water-stopping wall, and that changes between a standby state in which it faces the outer wall surface of the water-stopping wall and an expanded state in which it protrudes outward from the upper part of the water-stopping wall as it rotates around the rotation axis.

[0011] According to the water stopping structure of claim 1, the water flow returning portion is provided on the upper part of the water stopping wall via a rotation shaft extending in the width direction of the water stopping wall. As the water flow returning portion rotates around the rotation shaft, it transitions between a standby state in which it faces the outer wall surface of the water stopping wall and a deployed state in which it projects outward from the upper part of the water stopping wall.

[0012] Here, when a water disaster such as a flood or inland flooding occurs, if a water flow collides with the outer wall surface of a water-stopping wall, the water flow may splash up along the outer wall surface, overflow the water-stopping wall, and flood the inside of the water-stopping wall.

[0013] In such a case, in the present invention, by transitioning the water flow deflecting section from the standby state to the deployed state, the water flow deflecting section protrudes outward from the upper part of the water blocking wall. As a result, the water flow that splashes up along the outer surface of the water blocking wall is guided to the outside of the water blocking wall along the underside of the water flow deflecting section. Therefore, it is possible to prevent water from seeping inside the water blocking wall without increasing the height of the water blocking wall.

[0014] On the other hand, during normal times (when there is no flood), the water flow deflector is in a standby state so that it does not protrude outward from the water cut-off wall and faces the outer wall surface. This reduces the impact of the water flow deflector on the appearance of the water cut-off wall during normal times.

[0015] The water-stopping structure described in claim 2 is the water-stopping structure described in claim 1, in which the water flow-reflecting portion collides with the outer wall surface of the water-stopping wall, receives the water flow that splashes up between the water flow-reflecting member in the standby state and the outer wall surface of the water-stopping wall, rotates, and transitions from the standby state to the deployed state.

[0016] According to the water-stopping structure of claim 2, the water flow deflecting portion collides with the outer wall surface of the water-stopping wall, receives the water flow that splashes up between the water flow deflecting member in a standby state and the outer wall surface of the water-stopping wall, rotates, and transitions from the standby state to the deployed state.

[0017] In this way, by utilizing the force of the water flow that hits the outer wall surface of the water blocking wall and bounces up along the outer wall surface to rotate the water flow returning section, energy savings can be achieved.

[0018] The water stopping structure according to a third aspect of the present invention is the water stopping structure according to the first aspect, further comprising a stopper portion that limits rotation of the water flow returning portion from the deployed state toward the inside of the water stopping wall.

[0019] According to the water stop structure of claim 3, the stopper portion limits the rotation of the water flow deflecting portion from the deployed state toward the inside of the water stop wall. This stopper portion can maintain the water flow deflecting portion at a predetermined deployed angle. Therefore, in the event of a flood, it is possible to efficiently prevent water from entering the inside of the water stop wall.

[0020] The water blocking structure described in claim 4 includes a water blocking wall and a water flow returning portion that projects outward from an upper portion of the water blocking wall.

[0021] According to the water blocking structure of claim 4, the water flow returning portion protrudes outward from the upper portion of the water blocking wall.

[0022] Here, when a water flow collides with the outer wall surface of a water-stopping wall during a flood or inland water inundation, the water flow may splash up along the outer wall surface, overflow the water-stopping wall, and flood the inside of the water-stopping wall.

[0023] In contrast, in the present invention, as described above, the water flow deflecting portion protrudes outward from the upper part of the water cut-off wall. As a result, in the event of a flood, the water flow that splashes up along the outer surface of the water cut-off wall is guided to the outside of the water cut-off wall along the underside of the water flow deflecting portion. This makes it possible to prevent water from seeping inside the water cut-off wall without increasing the height of the water cut-off wall.

[0024] The water stopping structure described in claim 5 is the water stopping structure described in any one of claims 1 to 4, wherein the water flow returning portion is a water flow returning member attached to the existing water stopping wall.

[0025] According to the water stop structure of claim 5, by attaching a water flow deflecting member to an existing water stop wall, it is possible to easily prevent water from entering the inside of the water stop wall in the event of a flood. [Effects of the Invention]

[0026] As described above, according to the present invention, it is possible to suppress water from entering inside the water blocking wall without increasing the height of the water blocking wall. [Brief explanation of the drawings]

[0027] [Figure 1] 1 is a vertical cross-sectional view showing a water blocking wall to which a water blocking structure according to a first embodiment is applied. [Figure 2] FIG. 10 is a vertical cross-sectional view showing the state of a water blocking wall according to a comparative example during flood damage. [Figure 3] FIG. 10 is a vertical cross-sectional view showing the state of a water blocking wall according to a comparative example during flood damage. [Figure 4] FIG. 2 is a vertical cross-sectional view showing the state of the water cut-off wall shown in FIG. 1 during flood damage. [Figure 5] FIG. 2 is a vertical cross-sectional view showing the state of the water cut-off wall shown in FIG. 1 during flood damage. [Figure 6]FIG. 10 is a vertical cross-sectional view showing a water blocking wall to which a water blocking structure according to a second embodiment is applied. [Figure 7] FIG. 7 is a vertical cross-sectional view showing the state of the water blocking wall shown in FIG. 6 during flood damage. [Figure 8] FIG. 7 is a vertical cross-sectional view showing the state of the water blocking wall shown in FIG. 6 during flood damage. DETAILED DESCRIPTION OF THE INVENTION

[0028] (First embodiment) First, the first embodiment will be described.

[0029] (Water cutoff wall) 1 shows a water stop wall 10 to which the water stop structure according to this embodiment is applied. The water stop wall 10 is provided to surround a structure such as a factory, and serves as a waterproof wall (tide barrier) that prevents water from entering a site 12 of the structure in the event of a water disaster such as a flood or inland flooding.

[0030] The water cutoff wall 10 is made of, for example, reinforced concrete. The height H of the water cutoff wall 10 is set based on the flood depth set by the national or local government, for example. A water flow deflector 20 is provided at the upper end of the water cutoff wall 10.

[0031] (Water flow return component) The water flow deflecting member 20 is made of, for example, concrete (precast concrete) and is attached by post-construction to the upper end of the existing water blocking wall 10. The water flow deflecting member 20 is formed with an L-shaped cross section and is provided along the upper end of the water blocking wall 10. The water flow deflecting member 20 has a base portion 22 and a water flow deflecting portion 24, each of which has an L-shaped cross section.

[0032] The water flow deflecting member 20 is not limited to being made of concrete, but may be made of steel or resin, for example. The water flow deflecting member 20 is not limited to being installed later, but may be attached to the water cut-off wall 10 when the water cut-off wall 10 is newly constructed, or may be installed integrally with the water cut-off wall 10.

[0033] The base portion 22 serves as an attachment portion (fixing portion) for the water blocking wall 10. The base portion 22 is formed in a wall shape and is provided along the inner wall surface 10A at the upper end portion of the water blocking wall 10. The base portion 22 is fixed to the upper end portion of the water blocking wall 10 by anchors (post-installed anchors), screws, etc. (not shown).

[0034] The upper end of the base portion 22 is positioned higher than the upper end of the water blocking wall 10. A water flow returning portion 24 is provided at the upper end of this base portion 22. The water flow returning portion 24 serves as a water flow receiving portion that receives water flow W (see FIG. 4 ) that collides with the outer wall surface 10B of the water blocking wall 10 and splashes up during a flood, thereby preventing the water flow from exceeding the water blocking wall 10.

[0035] The water flow returning portion 24 projects outward like a canopy from the upper end of the base portion 22 along the upper end surface of the water blocking wall 10. Furthermore, the tip portion 24T of the water flow returning portion 24 is positioned outward from the outer wall surface 10B of the water blocking wall 10. The lower surface of this water flow returning portion 24 serves as a water flow receiving surface 24S that receives the water flow W (see FIG. 4) that collides with the outer wall surface 10B of the water blocking wall 10 and splashes up during a flood.

[0036] In a side view of the water stop wall 10, the angle of the water flow receiving surface 24S of the water flow returning portion 24 with respect to the outer wall surface 10B is approximately 90 degrees. In addition, the projection length L of the water flow returning portion 24 is set appropriately based on, for example, the location conditions of the water stop wall 10, i.e., the amount and speed (force) of the water flow W that reaches the water stop wall 10 in the event of a flood.

[0037] In addition, in a side view of the water blocking wall 10, the angle of the water flow receiving surface 24S of the water flow returning portion 24 with respect to the outer wall surface 10B is not limited to approximately 90 degrees, but may be less than 90 degrees or may be greater than 90 degrees.

[0038] Furthermore, the shape of the water flow returning member 20 is not limited to an L-shape and can be changed as appropriate. For example, the base portion 22 may be omitted from the water flow returning member 20, and the water flow returning portion 24 may be fixed to the upper end surface of the water blocking wall 10, or the water flow returning portion 24 may be provided so as to protrude from the outer wall surface 10B of the water blocking wall 10.

[0039] (action) Next, the operation of the first embodiment will be described.

[0040] 2 and 3 show a water cutoff wall 10 to which the water flow deflecting member 20 according to this embodiment is not attached. In this case, as shown in Fig. 2 and 3, when a water flow W collides with the outer wall surface 10B of the water cutoff wall 10 during a flood or inland water inundation, the water flow W may jump up along the outer wall surface 10B and overflow the water cutoff wall 10, resulting in flooding inside the water cutoff wall 10.

[0041] 4, in this embodiment, a water flow returning member 20 is attached to the upper end of the water blocking wall 10. A water flow returning portion 24 of the water flow returning member 20 protrudes outward from the upper end of the water blocking wall 10.

[0042] As a result, in this embodiment, in the event of a flood, the water flow W that splashes up along the outer wall surface 10B of the water stop wall 10 is guided to the outside of the water stop wall 10 along the underside of the water flow returning portion 24. Thereafter, as shown in Fig. 5, the water flow W stabilizes at a water level that does not exceed the water stop wall 10 (for example, below the flood depth). Therefore, flooding into the inside of the water stop wall 10 can be suppressed without increasing the height of the water stop wall 10.

[0043] Furthermore, the water flow deflecting member 20 can be attached to an existing water blocking wall 10. Therefore, in the event of a flood, water can be easily prevented from entering the inside of the existing water blocking wall 10.

[0044] Second Embodiment Next, a second embodiment will be described. In the second embodiment, the same components as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0045] (Water flow return mechanism) 6 shows a water current returning mechanism (water current returning device) 30 according to this embodiment. The water current returning mechanism 30 is an automatic deployment mechanism that utilizes the force of the water current W to deploy a water current returning member 36 to a predetermined position in the event of a flood, thereby preventing water from entering the inside of the waterstop wall 10.

[0046] The water flow returning mechanism 30 includes a pair of bearing members 32, a rotating shaft 34, a water flow returning member 36, a lower stopper portion 40, and an upper stopper portion 42. The water flow returning member 36 is an example of a water flow returning portion.

[0047] The pair of bearing members 32 are attached to the upper end of the outer wall surface 10B of the water blocking wall 10. The pair of bearing members 32 are also arranged with a gap between them in the width direction of the water blocking wall 10. The pair of bearing members 32 rotatably support a rotating shaft 34.

[0048] The rotating shaft 34 is disposed along the width direction of the water blocking wall 10, and both ends thereof are rotatably supported by a pair of bearing members 32. A water flow diverting member 36 is provided on this rotating shaft 34. In other words, the water flow diverting member 36 is provided on the upper end of the water blocking wall 10 via the rotating shaft 34 and the pair of bearing members 32.

[0049] The water flow diverting member 36 is formed in a plate shape from, for example, a steel plate or the like. One end (base end) of the water flow diverting member 36 is joined to the rotary shaft 34, and is rotatable integrally with the rotary shaft 34. The water flow diverting member 36 extends radially from the rotary shaft 34.

[0050] As the water flow deflector member 36 rotates around the rotation axis 34, it transitions between a standby state (solid line state) in which it faces the outer wall surface 10B of the water-blocking wall 10, and an deployed state (dotted line state) in which it extends outward from the upper end of the water-blocking wall 10.

[0051] In the standby state, the water flow deflecting member 36 is arranged in the vertical direction, and is arranged with a predetermined gap G between it and the outer wall surface 10B of the water blocking wall 10. As a result, as shown in Fig. 7, in the event of a flood, the water flow W that collides with the outer wall surface 10B of the water blocking wall 10 and splashes up can enter between the water flow deflecting member 36 and the outer wall surface 10B of the water blocking wall 10.

[0052] In addition, in the standby state, the surface of the water flow returning member 36 facing the water blocking wall 10 serves as a water flow receiving surface 36S that receives the water flow W that collides with the outer wall surface 10B of the water blocking wall 10 and splashes up in the event of a flood.

[0053] 8, in the deployed state, the water flow diverting member 36 is disposed substantially horizontally, and the angle (deployed angle) of the water flow diverting member 36 with respect to the outer wall surface 10B of the water blocking wall 10 is substantially 90 degrees in a side view of the water blocking wall 10. In this deployed state, the water flow receiving surface 36S of the water flow diverting member 36 faces downward.

[0054] Here, the bearing member 32 is provided with a lower stopper portion 40. The lower stopper portion 40 restricts the rotation of the water flow returning member 36 from the standby state toward the water blocking wall 10, thereby suppressing interference of the water flow returning member 36 with the outer wall surface 10B of the water blocking wall 10.

[0055] The lower stopper portion 40 is disposed between one end (base end) of the water flow deflecting member 36 in the standby state and the outer wall surface 10B of the water blocking wall 10. Depending on the position of this lower stopper portion 40, the attitude of the water flow deflecting member 36 in the standby state can be adjusted.

[0056] Additionally, the bearing member 32 is provided with an upper stopper portion 42. The upper stopper portion 42 limits rotation from the deployed state toward the inside (upper side) of the water blocking wall 10, thereby maintaining the water flow deflecting member 36 in the deployed state.

[0057] The upper stopper portion 42 is disposed above the base end of the deployed water current deflecting member 36. Depending on the position of this upper stopper portion 42, the attitude (angle) of the deployed water current deflecting member 36 can be adjusted.

[0058] The arrangement and number of the lower stopper portions 40 and the upper stopper portions 42 can be changed as appropriate. The lower stopper portions 40 and the upper stopper portions 42 may be provided as needed, and can be omitted as appropriate.

[0059] (action) Next, the operation of the second embodiment will be described.

[0060] 6, according to this embodiment, a water current returning mechanism 30 is provided at the upper end of the water blocking wall 10. A water current returning member 36 of the water current returning mechanism 30 is provided at the upper end of the water blocking wall 10 via a rotary shaft 34 extending in the width direction of the water blocking wall 10 and a pair of bearing members 32.

[0061] The water flow deflector member 36 is capable of transitioning between a standby state in which it faces the outer wall surface 10B of the water blocking wall 10 and an expanded state in which it extends outward from the upper end of the water blocking wall 10 as it rotates around the rotation axis 34.

[0062] Here, in normal times (normal times) other than when there is a flood, the water flow diverting members 36 are in a standby state. In the standby state, the water flow diverting members 36 do not protrude outward from the water blocking wall 10, but face the outer wall surface 10B of the water blocking wall 10. This makes it possible to reduce the impact of the water flow diverting members 36 on the appearance of the water blocking wall 10 in normal times.

[0063] 7, when a water flow W collides with the outer wall surface 10B of the water stop wall 10 during a flood, the water flow W splashes up along the outer wall surface 10B and penetrates between the standby water flow diverting member 36 and the outer wall surface 10B of the water stop wall 10. This water flow W pushes the water flow receiving surface 36S of the water flow diverting member 36 outward from the water stop wall 10 (in the direction of arrow a), causing the water flow diverting member 36 to rotate around the rotation axis 34 toward the outside of the water stop wall 10.

[0064] 8, as a result of this rotation, the water current diverting member 36 transitions from the standby state to the deployed state, and the water current diverting member 36 protrudes outward from the upper end of the water blocking wall 10. In addition, in the deployed state, the base end of the water current diverting member 36 comes into contact with the upper stopper portion 42. This upper stopper portion 42 restricts the rotation of the water current diverting member 36 from the deployed state toward the inside of the water blocking wall 10. As a result, the water current diverting member 36 is maintained in the deployed state, i.e., in a state in which it protrudes outward from the upper end of the water blocking wall 10.

[0065] As a result, the water flow W that splashes up along the outer wall surface 10B of the water blocking wall 10 is guided along the water flow receiving surface (lower surface) 36S of the water flow returning member 36 to the outside of the water blocking wall 10. Therefore, it is possible to suppress water from seeping into the inside of the water blocking wall 10 without increasing the height of the water blocking wall 10.

[0066] In addition, the force of the water flow W that collides with the outer wall surface 10B of the water-stopping wall 10 and bounces up along the outer wall surface 10B is used to rotate the water flow deflection member 36, thereby transitioning the water flow deflection member 36 from a standby state to an deployed state, thereby achieving energy savings.

[0067] Furthermore, in this embodiment, the upper stopper portion 42 limits the rotation of the water flow deflecting member 36 from the deployed state toward the inside of the water blocking wall 10. The upper stopper portion 42 makes it possible to maintain the water flow deflecting member 36 at a predetermined deployed angle. Therefore, in the event of a flood, it is possible to efficiently prevent water from entering the inside of the water blocking wall 10.

[0068] Next, when the water flow W weakens and the force of the water flow W acting on the water flow receiving surface 36S of the water flow diverting member 36 becomes smaller, the water flow diverting member 36 rotates downward about the rotation shaft 34 due to its own weight.

[0069] 6, as a result of this rotation, the water current diverting member 36 transitions from the deployed state to the standby state, and the water current diverting member 36 faces the outer wall surface 10B of the water blocking wall 10. In addition, in the standby state, the base end of the water current diverting member 36 comes into contact with the lower stopper portion 40. This lower stopper portion 40 limits the rotation of the water current diverting member 36 from the standby state toward the water blocking wall 10. As a result, the water current diverting member 36 is maintained in the standby state, that is, in a state in which the water current diverting member 36 faces the outer wall surface 10B of the water blocking wall 10. Therefore, interference of the water current diverting member 36 with the outer wall surface 10B of the water blocking wall 10 can be suppressed.

[0070] In this embodiment, the force of the water flow W is used to rotate the water flow deflection member 36, thereby transitioning from the standby state to the deployed state. However, the water flow deflection member 36 may be rotated by a driving source such as a motor, without being limited to the force of the water flow W. In this case, the driving source such as a motor may be operated by, for example, an administrator in the event of a flood, or may be operated automatically based on flood information.

[0071] (Variation) Next, modified examples of the first and second embodiments will be described. Note that, although various modified examples will be described below using the first embodiment as an example, these modified examples can also be applied to the second embodiment as appropriate.

[0072] In the first embodiment, the water flow deflecting member 20 is provided at the upper end of the water blocking wall 10. However, the water flow deflecting member 20 is not limited to being provided at the upper end of the water blocking wall 10, and may be provided, for example, at the top of the water blocking wall 10.

[0073] In the first embodiment, the water blocking wall 10 is provided so as to surround the site 12. However, the arrangement and number of the water blocking walls 10 can be changed as appropriate.

[0074] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment and various modified examples may be used in appropriate combination, and it goes without saying that the present invention can be implemented in various forms as long as it does not deviate from the gist of the present invention. [Explanation of symbols]

[0075] 10 Water cutoff wall 10B External wall surface 20 Water flow return member 24 Water flow return section 24S Water flow receiving surface 34 Rotation axis 36 Water flow return member (water flow return part) 36S Water flow receiving surface 42 Upper stopper part (stopper part) W water flow

Claims

1. Water cutoff walls and a water flow deflector that is provided on an upper portion of the water blocking wall via a rotation shaft that extends in the width direction of the water blocking wall, and that changes between a standby state in which it faces the outer wall surface of the water blocking wall and a deployed state in which it projects outward from the upper portion of the water blocking wall as it rotates around the rotation shaft; A water-stopping structure.

2. the water flow returning portion collides with the outer wall surface of the water blocking wall, and receives the water flow that splashes up between the water flow returning member in the standby state and the outer wall surface of the water blocking wall, thereby rotating and transitioning from the standby state to the deployed state. The water-stopping structure according to claim 1.

3. a stopper portion that limits rotation of the water flow returning portion from the deployed state toward the inside of the water blocking wall, The water-stopping structure according to claim 1.

4. Water cutoff walls and A water flow return portion extending outward from an upper portion of the water blocking wall; A water-stopping structure.

5. The water flow returning portion is a water flow returning member attached to the existing water blocking wall, The water-stopping structure according to any one of claims 1 to 4.

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