JP5869059B2 - Seawall - Google Patents

Description

  The present invention relates to a seawall.

  In recent years, there has been a need for a seawall that exceeds 10m in order to reduce land damage caused by a large-scale tsunami. However, as the height of the seawall is higher, the surrounding landscape may be damaged, so a high seawall is not necessarily required.

  Conventionally, a foldable seawall has been proposed as a seawall that does not impair the landscape and can suppress flooding caused by a tsunami or storm surge (see, for example, Patent Document 1).

  The foldable type seawall described in Patent Document 1 includes a seawater block that receives a tsunami and prevents inundation. The tide block is formed of a plurality of panels and is supported by a support group. This foldable seawall includes a wire (first wire) for raising a column group and a wire (second wire) for developing a panel connected in a bellows shape. The first wire is connected to the first hoisting device, and the second wire is connected to the second hoisting device.

  In order to construct a foldable type seawall, first, the first wire is wound up by the first winding device, whereby the column group is started up. Next, the second wire is wound up by the second winding device, so that the panel connected in a bellows shape is developed to construct a tide block.

  The foldable seawall is usually in a state of being surrendered, so it is unlikely to damage the landscape.

JP 2011-117236 A

  However, since the foldable seawall described in Patent Document 1 needs to be constructed by winding up the first wire and the second wire before reaching the land after the tsunami occurs, the occurrence of the tsunami If the time to reach the land is short, there is a risk that construction will not be in time.

  This invention is made | formed in view of the said reason, The objective is to provide the tide bank which can suppress the damage of the inundation by a tsunami and a storm surge, and can suppress the deterioration of a landscape.

Embankment of the invention of claim 1 includes a plurality of tide table 1 which is arranged along a coastline, are installed on land, and a base 2 for holding a plurality of tide table 1 undulations freely, base 2 integrally has a bearing 22 formed as a groove cross-section C-shaped, each of the plurality of tide table 1, the shaft portion 11 of substantially cylindrical shape which is rotatably supported by bearings 22, a shaft portion 11 The tide block 10 is located on the sea side of the shaft 11 in the lying state, and the tide block 10 is provided on the sea side of the bottom surface of the tide block 10 in the lying state, and has sufficient buoyancy to float the tide block 10 on seawater. The plurality of tide blocks 10 have a floating box 12 to be provided, and the plurality of tide blocks 10 constitute a road through which a vehicle passes along the coastline when in a lying state .

The tide embankment according to the invention of claim 2 is arranged along the coastline and is located on the land above the river and the tide table 1 that is located above the river and bridges the river so that the tide table 1 can be raised and lowered freely. The base 2 has a bearing 22 that is formed as a groove having a C-shaped cross section and is provided with an opening 223 on the upstream side of the river. The tide base 1 is rotatable by the bearing 22. A substantially cylindrical shaft portion 11 supported by the shaft portion 11, a tide block 10 that is provided integrally with the shaft portion 11 and is located on the sea side of the shaft portion 11 in the lying state, and the sea on the lower surface of the tide block 10 in the lying state. The second part which is provided on the side portion and which is provided integrally with the shaft portion 11 and the levitation force 12 which gives the tide block 10 sufficient buoyancy to float on the seawater is located on the opposite side of the shaft portion 11 from the tide block 10. With a tide block 5 and a second tide block When the tide block 10 is in a lying state, the tide 5 protrudes from the bearing 22 through the opening 22 to the upstream side of the river so that it is located above the river, and when the tide block 10 is in a standing state, It is constructed so as to be immersed in water and block the flow path of the river .

The tide embankment of the invention of claim 3 is the tide embankment of the invention of claim 1 , wherein the plurality of tide tables 1 are located above the river and include a tide table 1 that constitutes a bridge. A bearing that is held up and down freely on a part of the base 2 installed on the land so as to straddle, a part of the base 2 is formed as a groove having a C-shaped cross section, and an opening 223 is provided on the upstream side of the river The tide table 1 having a bridge and constituting a bridge is further provided with a second tide block 5 which is provided integrally with the shaft portion 11 and located on the opposite side of the tide block 10 of the shaft portion 11. The block 5 protrudes from the bearing 22 through the opening 22 to the upstream side of the river so as to be positioned above the river when the tide block 10 is in a lying state, and when the tide block 10 is in a standing state, It is configured to immerse in water and block the flow path of the river And said that you are.

The tide embankment of the invention of claim 4 is the invention of claim 1 or 3 , wherein each of the plurality of tide blocks 10 is provided with a convex portion 14 on one of the left and right side surfaces, and the other side surface with the convex portion 14. A recess 15 that can be fitted is provided .

The invention of claim 5 is the invention according to any one of claims 1 to 4, further comprising a linear connecting member 7, the connecting member 7 having one end attached to the tide table 1 and the other end buried in the ground. It is characterized by being fixed to the anchor 8 or the base 2 made.
The invention of claim 6 is the invention according to any one of claims 1 to 5, wherein the tide table 1 further includes an auxiliary block 3 rotatably connected to the sea side end of the tide block 10 in the lying state, A float 32 is provided on the lower surface of the auxiliary block 3 in the lying state.
The invention of claim 7 is characterized in that, in the invention of claim 6, a solar panel 9 is provided on the upper surface of the auxiliary block 3 in the lying down state.

According to the first aspect of the present invention, when the sea level rises due to a tsunami or storm surge, the tide table rotates and rises due to the buoyancy of the buoyancy, so the time from the occurrence of the tsunami to the land is short However, there is an effect that the damage from flooding can be suppressed by the tsunami at the tide table. In addition, when the sea level is normal, the tide table is lying down without standing, so deterioration of the landscape can be suppressed. Moreover, when the sea level does not rise to the position of the seawall due to a tsunami or storm surge, the seafloor stand is kept in a collapsed state, and the upper surface can be used as a road on which vehicles pass along the coastline.

According to the invention of claim 2, when the sea level rises due to a tsunami or storm surge, the tide table rotates and rises due to the buoyancy of the buoy, so the time from the occurrence of the tsunami to the land is short However, there is an effect that the damage from flooding can be suppressed by the tsunami at the tide table. In addition, when the sea level is normal, the tide table is lying down without standing, so deterioration of the landscape can be suppressed. In addition, when the sea level has not risen to the position of the seawall due to a tsunami or storm surge, the seafloor can be used as a bridge while being kept in a lying state. Moreover, when the sea level rises, the reverse flow of sea water to the river due to a tsunami or storm surge can be suppressed by the second tide block.
According to invention of Claim 3, when the sea level rises by the 2nd tide block of the tide table which comprises a bridge, the backflow of the seawater to the river by a tsunami or a storm surge can be suppressed.

According to the invention of claim 4, between the anti-tide table and tide table, fitted convex and concave portions also is provided a gap for absorbing the expansion caused by tide table heat seawater is intrusion It is hard to do.

According to invention of Claim 5, the strength with respect to the tsunami of a tide table can be reinforced by connecting a tide table and the anchor or foundation embedded in the ground with the linear connection member.
According to invention of Claim 6, even if it is the topography where road width is not fully securable, without connecting a tide bank to the land side by connecting an auxiliary block to the sea side of a tide block, a tide Sufficient height as a bank can be secured.
According to the invention of claim 7, the space above the auxiliary block can be used effectively, and the power generated by the solar panel can be supplied to, for example, a road lighting device installed on a tide table used as a road. .

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing in case the sea level rises, showing Embodiment 1 of the tide lantern according to the present invention. It is sectional drawing in case the sea level of a tide embankment same as the above is normal height. It is a top view which shows the state where two or more same seawalls were connected. It is a side view which shows the state where two or more same seawalls were connected. It is a side view which shows the part between two adjacent seawalls in the state where the seawalls same as the above were connected. It is sectional drawing in case the seawater level is normal height, showing Embodiment 2 of the tide lantern according to the present invention. It is sectional drawing when the sea level of a tide embankment same as the above rises. It is Embodiment 3 of the seawall according to this invention, and is sectional drawing in case the sea level is normal height. It is a top view in the case of the normal height of a seawall. It is sectional drawing when the sea level of a tide embankment same as the above rises. It is a top view when the sea level of a sea levee rises same as the above. Embodiment 4 of the seawall according to the present invention is shown and is a cross-sectional view when the sea level rises.

(Embodiment 1)
Hereinafter, Embodiment 1 of a seawall according to the present invention will be described with reference to FIGS. 1 to 5. However, the normal time means a case where the sea level has not risen to the position of the tide table due to a tsunami or storm surge. The sea level rise means a case where the sea level rises above the position of the tide table due to a tsunami or storm surge.

  The seawall includes a seawall 1 and a base 2 installed on the coast.

  The tide table 1 includes a tide block 10, a shaft 11, and a float 12.

  The tide block 10 is a plate-like member for receiving a tsunami or storm surge on the sea side (facing the sea) in a standing state and preventing damage due to inundation on land. The tide block 10 is formed of a material having strength and durability, for example, a material such as reinforced concrete or reinforced concrete.

  The tide block 10 is formed in, for example, a quadrilateral as viewed from the thickness direction (see FIG. 3). The tide block 10 is preferably provided with a convex portion 14 on one of the left and right side surfaces, which are side surfaces in the direction along the coast, and a concave portion 15 having a shape that allows the other side surface to be fitted to the convex portion 14. For example, the convex portion 14 is provided on the right side surface of the tide block 10 when the tide block 10 is viewed from the sea side, and the concave portion 15 is provided on the left side surface (see FIGS. 3 and 4). The convex portion 14 may be provided on the left side surface, and the concave portion 15 may be provided on the right side surface. Moreover, you may have the convex part 14 or the recessed part 15 only in one of the left-right side surfaces.

  The shaft portion 11 is formed in a substantially cylindrical shape having the same length as the left and right widths of the tide block 10 and is provided at an end portion on the land side of the tide block 10 in a state of being kept horizontal. The shaft portion 11 is formed with an outer diameter larger than the thickness of the tide block 10.

  The float 12 is formed in a box shape and sealed with a material such as a metal or a resin that is rust-proofed so that seawater does not enter. Since the float 12 has a buoyancy sufficient to float the tide block 10 in seawater, air or the like having a specific gravity smaller than that of seawater is placed therein. The float 12 is provided on the sea side and the lower surface of the tide block 10 in a state of being kept horizontal. However, the installation position, size, and quantity of the float 12 are determined by the material of the float 12 and contents, the size and material of the tide block 10, and the like.

  The base 2 is formed of a material such as reinforced concrete or reinforced concrete, and includes a base 20, a stopper 21, a bearing 22, and a floating holding portion 23.

  The base 20 is a member for holding the tide block 10 horizontally during normal times, and is formed in a plate shape having the same left and right width as the tide table 1. Note that horizontal does not mean strict horizontal, but may be slightly inclined from horizontal.

  The stopper 21 is a member for supporting the tide table 1 by hitting the tide table 1 when the tide table 1 is rotated to an upper limit angle where the tide table 1 can rotate. The stopper 21 is formed in a substantially plate shape having the same left and right width as the base 20, and is provided integrally on the upper surface of the base 20 so that the land side surface is at the same position as the land side surface of the base 20. It is done.

  The bearing 22 is formed at the boundary between the base 20 and the stopper 21 as a C-shaped groove as viewed from the left side of the boundary (see FIG. 1). The inner diameter of the bearing 22 is formed larger than the outer diameter of the shaft portion 11. The bearing 22 has an opening 221 on the sea side through which the tide block 10 protrudes. The opening 221 is formed to be smaller than the outer diameter of the shaft portion 11 so that the shaft portion 11 does not come out. The upper end of the opening 221 defines the height of the tide block 10 when the tide block 10 stands, that is, the upper limit of the rotation angle of the tide table 1. Note that the upper limit of the rotation angle is less than 90 degrees. Further, the lower end of the opening 221 is provided at the same height as the upper surface of the base 20 in order for the tide block 10 to fall horizontally.

  The buoyancy holding part 23 is integrally provided in a step shape on the surface of the base 20 on the sea side in order to accommodate the buoyancy 12 in a normal state. The floating holding part 23 is formed to a height obtained by subtracting the thickness of the floating 12 from the height of the base 20 (see FIG. 2). The material, shape, strength, and durability of the tide table 1 and the base 2 are determined by computer simulation, model experiments, and the like.

  A method of assembling the seawall in this implementation state will be described.

  First, the operator constructs and integrates the base 20 on which the groove 222 constituting the lower part of the bearing 22 is processed and the floating holding part 23 at the seawall installation site. In addition, the operator integrally forms the tide block 10 and the shaft portion 11, and fixes the float 12 to the tide block 10.

  Next, the operator keeps the tide block 10 horizontal with the surface on which the float 12 is provided facing downward, and puts the shaft portion 11 in the groove 222 constituting the lower portion of the bearing 22 provided on the base 20. The tide table 1 is installed so that the tide block 10 is maintained on the upper surface of the base 20.

  Finally, the operator constructs the stopper 21 on which the groove 212 constituting the upper portion of the bearing 22 is processed on the base 20 so that the groove 212 is aligned with the groove 222 of the base 20.

  The operation at the sea level rise of the seawall of Embodiment 1 will be described with reference to FIGS. 1 and 2.

  As shown in FIG. 2, the tide table 1 normally holds the tide block 10 horizontally on the upper surface of the base 20. When the sea level rises due to a tsunami or storm surge, the tide table 1 is rotated counterclockwise in FIG. As shown in FIG. 1, the tide table 1 can rotate until it hits the upper end of the opening 221 that is the upper limit angle of rotation. The maximum sea level height that can prevent the intrusion of seawater is determined by the width of the tide block 10 and the upper limit angle of rotation. Further, when the sea level is lowered since the sea level rises, the tide table 1 rotates clockwise in FIG. 1 so as to descend according to the height of the sea level. Further, when the sea level returns to normal, the tide block 10 returns to the state where it is lying horizontally on the upper surface of the base 20.

  Therefore, since the tide table 1 rotates and rises due to the buoyancy of the buoy 12, even if the time from the occurrence of the tsunami to the land is short, the inundation damage to the land due to the tsunami and storm surge is suppressed. can do. Moreover, since the tide table 1 does not stand up and lies on the upper surface of the base 20 at normal times, it is possible to prevent the scenery from being damaged.

  By the way, the tide embankment of the first embodiment can be used as a road through which people, vehicles, etc. can pass on the upper surface of the tide block 10 during normal operation (see FIG. 2). In the conventional example described in Patent Document 1, since the tide bank is normally in a state in which the panels connected in a bellows shape are folded, it is difficult to use as a road. In addition, when using as a road, it is preferable to provide the guardrail 13 in the vicinity of the sea-side end of the tide block 10 in a horizontal state and on the upper surface.

  By the way, the tide barrier of this Embodiment 1 may be formed in a row along the coastline. A gap is provided between adjacent tide blocks 10 to absorb expansion of the material due to heat. Therefore, for example, when the tide block 10 has a flat side surface, seawater may easily enter between the adjacent tide blocks 10. However, the tide embankment of Embodiment 1 is provided with the convex part 14 and the recessed part 15 in the left-right side surface as mentioned above. Therefore, as shown in FIGS. 3 and 4, adjacent tide blocks 10 can suppress the intrusion of seawater due to a tsunami or storm surge by fitting the convex portions 14 and the concave portions 15 together. Furthermore, the convex portion 14 and the concave portion 15 can absorb expansion and contraction of the tide block 10 due to thermal expansion.

  In addition, it is preferable to provide the waterproof sheet 16 formed with flexible materials, such as rubber | gum, between the adjacent tide blocks 10 as shown in FIG. The waterproof sheet 16 covers the gap between the adjacent tide blocks 10 from below. Here, the waterproof sheet 16 is attached to both the tide blocks 10 by being slacked downward so that a space is provided between the tide blocks 10 and the waterproof sheet 16. In this way, by attaching the waterproof sheet 16 between the adjacent tide blocks 10, it is possible to further prevent seawater from entering between the adjacent tide blocks 10.

In addition, assuming that a part of the tide embankment of Embodiment 1 is damaged due to a large earthquake or the like and seawater enters the land, a similar tide embankment may be provided on the land side.
(Embodiment 2)
Hereinafter, Embodiment 2 of the seawall according to the present invention will be described with reference to FIGS. 6 and 7. In addition, about the structure which overlaps with Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  For example, when the sea level rise due to a very large tsunami is assumed, it is necessary to increase the height of the tide table 1 in the tide bank according to the first embodiment. In that case, it is necessary to move the installation position to the land side as the seawall becomes higher. However, for example, if there is an obstacle such as a building on the land side, it is difficult to move the tide barrier to the land side. In addition, for example, when installing a seawall on coastal terrain where it is difficult to secure a wide road width, it is difficult to secure the height necessary to cope with sea level rise caused by a very large tsunami.

  Therefore, in the second embodiment, the auxiliary block 3 is connected to the sea side of the tide block 10 so that the tide bank is not moved to the land side, and even if the road width is not sufficiently secured, the tide Ensure sufficient height as a bank.

  In the tide embankment of Embodiment 2, the tide table 1 further includes an auxiliary block 3.

  In order to hold the auxiliary block 3, the base 2 further includes an extension portion 24 that is integrally provided on the surface of the floating holding portion 23 on the sea side.

  The extension 24 is formed in a plate shape. It is preferable that the extension part 24 is provided so as to be inclined so as to be positioned downward as the sea side. By providing such an inclined block, the auxiliary block 3 can easily secure the required length even if the distance from the sea-side surface of the floating holding portion 23 to the sea is short.

  The auxiliary block 3 includes a connection portion 31, a float 32, and a sea side end portion 33.

  The connection part 31 is a hinge, for example, and is connected to the sea side end of the tide table 1. However, the structure of the connection part 31 is not limited to the above-mentioned thing, if it has the intensity | strength which can prevent permeation of seawater.

  The floating box 32 is provided on the sea-side end and lower surface of the auxiliary block 3 in a lying state. The float 32 has the same configuration as the float 12 and is normally held on the upper surface of the extension 24 as shown in FIG.

  The sea-side end portion 33 is provided to be bent so that the auxiliary block 3 tilts upward while the auxiliary block 3 is lying down so that seawater can easily enter between the extension portion 24 and the auxiliary block 3 when the sea level rises.

  As described above, in the second embodiment, the auxiliary block 3 is connected to the sea side of the tide block 10 so that the tide bank is not moved to the land side, and it is sufficient as a tide bank regardless of the topography. Can be secured.

It should be noted that the tide embankment of the first embodiment and the tide embankment of the second embodiment may be used in combination according to the terrain of the coast, the height of the required tide lantern, and the like.
(Embodiment 3)
Hereinafter, Embodiment 3 of the seawall according to the present invention will be described with reference to FIGS. In addition, about the structure which overlaps with Embodiment 1 or Embodiment 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  When assuming the reverse flow of seawater into the river due to a tsunami or storm surge, it is preferable to provide a seawall at the mouth of the river to prevent intrusion of seawater. Therefore, the tide barrier of the third embodiment provides the base 2 so as to extend over both banks of the river.

  The tide bank of Embodiment 3 includes a tide table 1 and a base 2 shown in FIGS. 8 and 9. Both ends of the base 2 are installed on both banks of the river so as to straddle the river. In addition, since the tide block 10 is lying down during normal times, it can be used as a bridge through which people and vehicles can pass.

  As shown in FIG. 8, the tide table 1 includes a tide block 10, a second tide block 5, a shaft 11, and a float 12. The tide table 1 has a lateral width that can cover the upper part of the river over the entire length of the river width. That is, the tide table 1 is formed smaller than the left and right width of the base 2 (see FIG. 9). Note that the tide table 1 may be provided with a left and right width corresponding to the width of the river only in the second tide block 5, and the tide block 10 and the shaft portion 11 may have the same left and right width as the base 2. Moreover, as shown in FIG. 8, it is preferable that a tide lantern is provided with the auxiliary block 3 and the extension part 24 which were demonstrated with the tide wall of Embodiment 2 supposing a high tsunami.

  The second tide block 5 is formed of a material such as reinforced concrete or reinforced concrete. The second tide block 5 is provided upstream of the tide block 10 with respect to the shaft portion 11. The second tide block 5 is provided, for example, so as to be located on the same plane as the tide block 10. The second tide block 5 may not be formed on the same plane as the tide block 10 depending on the shape of the riverbed 6. In that case, the angle of the second tide block 5 with respect to the tide block 10 is not limited to 180 ° as long as the second tide block 5 is submerged in the water while the tide block 10 is standing. In addition, it is preferable that the 2nd tide block 5 is provided so that the lower end of the 2nd tide block 5 may contact the riverbed 6, when the tide table 1 reaches the upper limit angle which can rotate.

  The bearing 22 has the 2nd opening part 223 for the 2nd tide block 5 to protrude in the upstream of a river. The 2nd opening part 223 is formed smaller than the outer diameter of the axial part 11, and is formed so that the axial part 11 may not come out to the upstream of a river. The upper end of the second opening 223 is formed so that the upper surface of the second tide block 5 is supported in a state where the tide block 10 is lying down horizontally. The lower end of the second opening 223 defines the upper limit of the rotation angle of the second tide block 5. The tide table 1 has a structure in which the upper limit angle that can be rotated by the stopper 21 is limited and the rotation stops when the tide table 1 hits the stopper 21. Therefore, the central angle of the opening 221 and the second opening 223 with respect to the rotatable arc is the same. Preferably there is.

  According to the tide bank of the third embodiment, the second tide block 5 is submerged in the water of the river when the sea level rises without disturbing the flow of the river during normal times, blocking the flow path of the river and tsunami and storm surge The reverse flow of seawater to the river due to can be suppressed. Further, when the tide block 10 is erected, when the lower tide block 5 is provided so that the lower end of the tide block 5 hits the riverbed 6, the river flow path can be blocked almost completely, and the reverse flow of seawater to the river can be prevented. Can be prevented.

  In addition, when the sea level rises, the tide embankment of Embodiment 3 stands up with the tide block 10 and blocks the water flowing from the upstream of the river, so the levee 4 on both banks of the river estimates the amount of increase in the river, It is formed at a height required to prevent the river water from flowing over the embankment 4 and into the land.

The seawall of Embodiment 3 may be used in combination with the seawall of Embodiment 1 or the seawall of Embodiment 2.
(Embodiment 4)
Hereinafter, Embodiment 4 of the seawall according to the present invention will be described with reference to FIG. In addition, about the structure which overlaps with Embodiment 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted. Also in FIG. 12, the direction perpendicular to the up-down direction and the sea-side land-side direction indicated by the arrows is the left-right direction.

  The seawall of this embodiment further includes a linear connecting member 7. The connecting member 7 is fixed to the anchor 8 or the base 2 having one end attached to the tide table 1 and the other end embedded in the ground. In the present embodiment, the connecting member 7 is chains 70 and 71. The chains 70 and 71 are formed of a metal material that has been subjected to rust prevention.

  One end of the chain 70 is attached to a position on the sea side of the lower surface of the tide block 10 with respect to the float 12 by using a semi-annular fixing member 101 or the like. The other end of the chain 70 is attached to the upper surface of the extension 24 of the base 2 using a semi-annular fixing member 241 or the like.

  One end of the chain 71 is attached to the lower surface of the sea side end 33 of the auxiliary block 3 using a semi-annular fixing member 331 or the like. The other end of the chain 71 is attached to the anchor 8 buried in the ground using a semi-annular fixing member 81 or the like.

  The chains 70 and 71 may be directly embedded in the tide block 10, the extension 24, the auxiliary block 3, and the anchor 8 without using the fixing members 101, 241, 331, and 81.

  The chains 70 and 71 are formed, for example, in such a length that they do not loosen when the tide table 1 is rotated to the upper limit angle at which the tide table 1 can rotate.

  Moreover, in this embodiment, the solar panel 9 is installed on the upper surface of the auxiliary block 3, and the space above the auxiliary block 3 is effectively utilized. The electric power generated by the solar panel 9 is supplied to, for example, a road lighting device installed on the tide table 1 used as a road. In addition, the solar panel 9 is not an essential configuration, and the seawall of the present embodiment may be one in which the solar panel 9 is not installed on the upper surface of the auxiliary block 3.

  In the tide embankment of the present embodiment described above, the tide block 10 and the extension 24 are connected by the chain 70, and the auxiliary block 3 and the anchor 8 embedded in the ground are connected by the chain 71. In response, when the tide table 1 rotates to the upper limit angle, the tension of the chains 70 and 71 acts on the upper part and the center part of the tide table 1. Thereby, the intensity | strength with respect to the tsunami of the tide table 1 can be reinforced. Moreover, in the tide bank of this embodiment, it can suppress that the force received from a tsunami concentrates on the location where the axial part 11 of the tide table 1 and the stopper part 21 of the base 2 contact, and the damage of the tide table 1 is suppressed. be able to.

  In the above-described embodiment, the example in which the chains 70 and 71 are formed to have a length that does not loosen in the state where the chains 70 and 71 are rotated to the upper limit angle at which the tide table 1 can rotate has been described. The tide table 1 may be formed to a length that does not sag in a state where the tide table 1 is rotated to a position before the upper limit angle.

  In the above-described seawall of the present embodiment, the example in which the two chains 70 and 71 are used as the connecting member 7 has been described. However, the connecting member 7 has only one of the chain 70 and the chain 71. It may be. Further, as the connecting member 7, three or more chains may be used. In addition, the connection member 7 may be attached to a plurality of places with a gap in the longitudinal direction of the tide table 1 (that is, the left-right direction).

  Moreover, although the example using a chain | strand as the connection member 7 was demonstrated in the seawall of this embodiment mentioned above, the connection member 7 may be a wire etc. not only with a chain | strand.

  In the first and third embodiments, the tide table 1 and the anchor 8 or the base 2 embedded in the ground may be connected by the connecting member 7 as in the present embodiment.

DESCRIPTION OF SYMBOLS 1 Tidal block 10 Tidal block 11 Shaft part 12 Floating 14 Convex part 15 Concave part 2 Base 22 Bearing 5 Second tide block 7 Connecting member 8 Anchor

Claims (7)

A plurality of tide tables arranged along the coastline ,
A base that is installed on land and holds each of the plurality of tide tables in a undulating manner ;
The base has a bearing formed as a groove having a C-shaped cross section,
Each of the plurality of tide tables is provided with a substantially cylindrical shaft portion that is rotatably supported by the bearings, and a tide block that is provided integrally with the shaft portion and is located on the sea side of the shaft portion in a lying state. If, on the lower surface sea-side portion of the tide block in the inclined state, and a浮函imparting buoyancy sufficient to float in the sea water to the tide block,
A plurality of the tide blocks constitute a road along which the vehicle passes along the coastline when the tide block is in the lying state . A tide table that is located along the coastline and forms a bridge above the river,
It is installed on land so as to straddle the river, and comprises a base for holding the tide table up and down freely,
The base has a bearing formed as a groove having a C-shaped cross section, and an opening is provided on the upstream side of the river,
The tide table includes a substantially cylindrical shaft portion that is rotatably supported by the bearing, a tide block that is provided integrally with the shaft portion and is located on the sea side of the shaft portion in a lying state, and the lodging Provided in the sea side portion of the lower surface of the tide block in the state, and provided with a buoyancy sufficient to float the tide block on seawater, provided integrally with the shaft portion, and the tide block of the shaft portion; Has a second tide block located on the opposite side,
The second tide block is
When the tide block is in the lying state, it protrudes from the bearing through the opening to the upstream side of the river so as to be located above the river,
A tide embankment configured to be immersed in the water of the river and block the flow path of the river when the tide block is in an upright state . The plurality of tide tables are
Located above the river, including a tide table that constitutes a bridge, the tide table is held up and down freely on a part of the foundation installed on the land so as to straddle the river,
A part of the base is formed as a groove having a C-shaped cross section, and has the bearing provided with an opening on the upstream side of the river,
The tide table constituting the bridge is
A second tide block provided integrally with the shaft portion and positioned on the opposite side of the tide block of the shaft portion;
The second tide block is
When the tide block is in the lying state, it protrudes from the bearing through the opening to the upstream side of the river so as to be located above the river,
Wherein when the tide block is upright state, submerged in the river, embankment according to claim 1, characterized in that it is configured to block the flow path of the river. Each of the plurality of the tide block, with one convex portion either of the right and left sides, to claim 1 or 3 the other end surface is characterized by comprising the projection and the engageable recess The described seawall. A linear connecting member;
5. The connection member according to claim 1, wherein one end of the connecting member is attached to the tide table, and the other end is fixed to an anchor embedded in the ground or the base. The described seawall. The tide table is
An auxiliary block rotatably connected to the sea side end of the tide block in the lying state;
The seawall according to any one of claims 1 to 5, wherein a floating is provided on a lower surface of the auxiliary block in the lying state. The seawall according to claim 6, wherein a solar panel is installed on the upper surface of the auxiliary block in the lying down state.

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