JP2013112963A - Breakwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breakwater capable of protecting facilities without being broken by a first wave and a second wave of seismic sea waves, which continuously arrive.SOLUTION: A breakwater 100 comprises: a first wall part 20 that is vertically provided so as to extend in a direction crossing a traveling direction of seismic sea waves; a second wall part 30 that is vertically provided at a further front side than the first wall part 20 in the traveling direction of the seismic sea waves and so as to face the first wall part 20; and impounded water (liquid) 50 that is filled in a space between the first wall part 20 and the second wall part 30.

Description

  The present invention relates to a breakwater / tidewall (hereinafter simply referred to as a breakwater) in which a liquid such as water storage is filled.

  A breakwater having a function as a water storage tank by filling the water inside the breakwater is known (see, for example, Patent Document 1). Such a breakwater has the advantage that the cost can be reduced and the installation space can be saved as compared with the case where the water tank and the breakwater are constructed separately.

JP 2010-112163 A

  By the way, in the breakwater that was constructed to protect the facilities near the coast from the tsunami, after the breakwater was destroyed by the first wave of the tsunami, the second wave that came after this first wave got over the breakwater, There is a concern that the equipment will be destroyed.

  The present invention has been made in view of such a problem, and is a breakwater capable of protecting equipment without being destroyed with respect to the first wave and the second wave of tsunamis that continuously arrive. The purpose is to provide.

In order to solve the above problems, the present invention provides the following means.
That is, the breakwater according to the present invention is a first wall portion standing so as to extend in a direction crossing the traveling direction of the tsunami, and the tsunami traveling direction forward side of the first wall portion, It is characterized by comprising a second wall portion erected so as to face the first wall portion, and a liquid filled in a space between the first wall portion and the second wall portion.

  According to the breakwater having such a feature, when a tsunami occurs, first, the first wave of the tsunami collides with the first wall portion. And the impact force exerted on the first wall part by such a first wave is applied to the second wall part through dispersion by the liquid filled between the first wall part and the second wall part. . That is, the impact force exerted on the first wall portion is transmitted to the second wall portion after undergoing a buffering action by the liquid. Therefore, even if the first wall is destroyed by the first wave, the impact force exerted on the second wall is small due to the buffering action by the liquid, so the second wall is destroyed by the first wave. Can be avoided.

  Furthermore, in the breakwater according to the present invention, it is preferable that the first wall portion and the second wall portion are each made of a steel plate.

As a result, the breakwater can be constructed at low cost. In addition, for example, after assembling the first wall part and the second wall part each made of steel plates together at the factory, if the integrated object of these first wall part and second wall part is transferred to the installation location, Workability can be improved, and cost can be further reduced.
Furthermore, when the impact force of the tsunami reaches the first wall portion and the second wall portion, the first wall portion and the second wall portion bend to cause the impact force to escape, so that these first wall portion and The collapse of the second wall can be avoided.

  Moreover, the breakwater according to the present invention includes concrete filled in a lower portion in a space between the first wall portion and the second wall portion, and the liquid includes the first wall portion and the second wall portion. It is preferable that the space is filled above the concrete.

  Thereby, since the lower part of a breakwater can be made into the SC structure where concrete was filled between a pair of steel plates, the robustness in the lower part of a breakwater can be ensured. Therefore, breakage of the breakwater due to the arrival of a tsunami can be avoided as much as possible.

  Furthermore, in the breakwater according to the present invention, it is preferable that a corrosion inhibitor is applied to the mutually opposing surfaces of the first wall portion and the second wall portion.

  Thereby, even if it is a case where a 1st wall part and a 2nd wall part are each comprised from a steel plate, it can avoid that the said steel plate corrodes.

  In the breakwater according to the present invention, the first wall portion and the second wall portion may be made of concrete.

  As a result, a breakwater that can withstand the first and second waves of the tsunami can be reliably constructed.

  Moreover, in the breakwater which concerns on this invention, it is preferable to provide the top-plate part which connects the upper ends of said 1st wall part and said 2nd wall part.

  Thereby, the liquid can be filled in a sealed state between the first wall portion and the second wall portion. Moreover, the robustness with respect to the impact force of the tsunami in the vicinity of the upper end of the first wall portion can be ensured. Therefore, it is possible to avoid the destruction of the first wall portion with respect to the first wave of the tsunami as much as possible.

In the breakwater according to the present invention, the liquid is preferably water.
Thereby, since the breakwater of this invention can be comprised by filling with water in an installation location, manufacturing cost can be reduced.

Furthermore, it is preferable that the breakwater according to the present invention also functions as a water storage tank.
Thereby, compared with the case where a breakwater and a water tank are constructed separately, respectively, cost reduction and saving of installation space can be aimed at.

  According to the breakwater according to the present invention, since the impact force exerted on the second wall portion by the first wave of the tsunami is small after buffering action by the water storage, the destruction of the second wall portion by the first wave is avoided. can do. Therefore, when the second wave of the tsunami arrives, the second wall can block the second wave, so that the facilities to be protected by the breakwater can be reliably protected.

It is a perspective view of the breakwater concerning a first embodiment of the present invention. It is a figure explaining the effect | action at the time of the 1st wave of a tsunami reaching the 1st wall part. It is a perspective view of the breakwater which concerns on 2nd embodiment of this invention. It is a perspective view of the breakwater concerning a first embodiment of the present invention.

Hereinafter, a first embodiment of a breakwater 100 according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the breakwater 100 is erected on a foundation 90 constructed on a ground 300 (land) facing the ocean 200, and protects facilities on the ground from a tsunami rushing from the ocean 200. And plays a role as a water tank. The foundation 90 is embedded in the ground 300 so as to extend in the vertical direction, a plurality of piles 92 whose upper ends are exposed on the ground 300, and a plate shape extending in parallel with the horizontal plane, and a lower surface is the upper end of the pile 92. It is comprised from the foundation main body 91 laid on the ground 300 so that it might be fixed.

  The breakwater 100 provided on such a foundation 90 includes a bottom plate portion 10, a first wall portion 20, a second wall portion 30, a top plate portion 40, and a water storage (liquid) 50.

  The bottom plate portion 10 is a plate-shaped steel plate that extends in parallel with a horizontal plane serving as a boundary between the ground 300 and the ocean 200. The bottom plate portion 10 is disposed so as to be laminated on the foundation main body 91 in the sea side (left side in FIG. 1) portion of the upper surface of the foundation main body 91.

  The first wall portion 20 is a plate-like steel plate that extends along the vertical plane and along the coastline, and is fixed integrally with the bottom plate portion 10 to a sea side portion of the upper surface of the bottom plate portion 10. Thereby, the 1st wall part 20 is standingly arranged so that it may extend in the direction orthogonal to the advancing direction of the tsunami approaching from the ocean 200. In addition, the 1st wall part 20 should just be erected so that it may extend in the direction which cross | intersects the advancing direction of a tsunami at least.

The second wall portion 30 is a plate-shaped steel plate that extends along the vertical plane and along the coastline. The second wall portion 30 is integrally formed with the bottom plate portion 10 on the land side (right side in FIG. 1) on the upper surface of the bottom plate portion 10. It is fixed. Accordingly, the second wall portion 30 is erected so as to face the first wall portion 20 on the front side in the traveling direction of the tsunami with respect to the first wall portion 20.
The first wall portion 20 and the second wall portion 30 are fixed and integrated with the bottom plate portion 10 by, for example, welding or bolt joining.

  In addition, the sea side part in the baseplate part 10 is made into the 1st flange part 11 extended to the sea side rather than the 1st wall part 20, and the land side part in this baseplate part 10 is 2nd. The second flange portion 12 extends to the land side from the wall portion 30. The breakwater 100 is fixed and integrated with the foundation 90 by the first flange portion 11 and the second flange portion 12 being firmly fixed to the foundation main body 91 by, for example, bolt joining or concrete joining.

  The top plate portion 40 is a steel plate having a plate shape extending in parallel with the bottom plate portion 10, and the first wall portion 20 and the second wall portion arranged to face each other in the tsunami traveling direction as described above. 30 are arranged so that the upper ends thereof are connected to each other. As a result, a space S partitioned by these is formed inside the bottom plate portion 10, the first wall portion 20, the second wall portion 30, and the top plate portion 40.

  The bottom plate portion 10, the first wall portion 20, the second wall portion 30, and the top plate portion 40 have end portions in the direction along the coastline, and the bottom plate portion 10, the first wall portion 20, and the second wall portion 30. And the side wall part (illustration omitted) which obstruct | occludes the space S divided by the top-plate part 40 is each provided.

  The water storage 50 is a space S defined by the bottom plate portion 10, the first wall portion 20, the second wall portion 30, the top plate portion 40 and the pair of side wall portions, that is, the first wall portion 20 and the second wall portion 30. The water S is filled in the space S between and inside and outside the space S through water supply / drain holes provided so as to communicate with the inside and outside of the space S. In the present embodiment, the entire space S is filled with the water storage 50.

  It is preferable that a corrosion inhibitor such as vinyl chloride is applied to at least the inner surfaces 20a, 30a of the first wall portion 20 and the second wall portion 30, that is, the surface in contact with the water storage 50. Moreover, it is preferable that the corrosion prevention material is apply | coated also to the upper surface of the baseplate part 10 which contacts the water storage 50, the lower surface of the top-plate part 40, and also the inner surface of a side wall part.

  When constructing such a breakwater 100, first, a frame in which a bottom plate portion 10, a first wall portion 20, a second wall portion 30, a top plate portion 40 and a pair of side wall portions are integrally joined to each other in a factory. Manufacture the body. And after mounting such a frame body on the upper surface of the foundation 90 which is the installation place of the breakwater 100 so that the baseplate part 10 may be laminated | stacked, the 1st flange part 11 and the 2nd flange part 12 of the baseplate part 10 are carried out. Is fixed to the foundation body 91 by bolting or concrete 60 joining. And the water storage 50 is filled into the space S between the baseplate part 10, the 1st wall part 20, the 2nd wall part 30, the top-plate part 40, and a pair of side wall part through the supply / discharge hole which is not shown in figure. This completes the breakwater 100 that functions as a water tank and plays a role as a breakwater.

  According to the breakwater 100 having such a configuration, since the water tank and the breakwater function are combined, it is possible to protect the equipment from damage caused by the tsunami while storing water in case of an emergency. Moreover, compared with the case where a water tank and a breakwater are constructed separately, there exists an advantage that a construction cost can be reduced.

  Here, when a large-scale tsunami occurs due to a huge earthquake, after the breakwater was destroyed by the first tsunami wave, the second wave coming after this first wave There is a concern that over the breakwater, equipment behind the breakwater will be destroyed.

On the other hand, according to the breakwater 100 of the present embodiment, when a tsunami occurs, the first wave of the tsunami first collides with the first wall portion 20. As shown in FIG. 2, the impact force exerted on the first wall portion 20 by the first wave passes through dispersion by the water storage 50 filled between the first wall portion 20 and the second wall portion 30. To the second wall 30.
That is, the impact force exerted on the first wall portion 20 is transmitted to the second wall portion 30 after being buffered by the water storage 50. Therefore, even if the first wall portion 20 is destroyed by the first wave, the impact force exerted on the second wall portion 30 is small through a buffering action by the water storage 50. Thereby, destruction of the 2nd wall part 30 by a 1st wave can be avoided.

Furthermore, in this embodiment, since the 1st wall part 20 and the 2nd wall part 30 consist of steel plates, respectively, the breakwater 100 can be constructed at low cost. In addition, for example, after assembling the bottom plate portion 10, the first wall portion 20, the second wall portion 30, the top plate portion 40, and the pair of side wall portions made of steel plates together in a factory, these integrated objects are installed at the installation location. If it is transported, it is possible to improve the workability at the site and further reduce the cost.
Further, when the impact force of the tsunami reaches the first wall portion 20 and the second wall portion 30, the first wall portion 20 and the second wall portion 30 are bent to release the impact force. The collapse of the first wall portion 20 and the second wall portion 30 can be avoided.

  Further, since the corrosion inhibitor is applied to the inner surfaces 20a, 30a of the first wall portion 20 and the second wall portion 30, that is, the surfaces facing each other, the first wall portion 20 and the second wall made of steel plates. It can avoid that the part 30 corrodes, and it becomes possible to ensure the function as a water tank.

  Moreover, in this embodiment, since the top plate part 40 which connects the upper ends of the 1st wall part 20 and the 2nd wall part 30 is provided, between the 1st wall part 20 and the 2nd wall part 30, water storage is carried out. 50 can be filled in a sealed state, and the function as a water storage tank can be secured. Moreover, the robustness with respect to the impact force of the tsunami in the vicinity of the upper end of the first wall portion 20 can be ensured. Therefore, it is possible to avoid the destruction of the first wall portion 20 with respect to the first wave of the tsunami as much as possible.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The breakwater 110 of the second embodiment includes a space S between the first wall portion 20 and the second wall portion 30, that is, the bottom plate portion 10, the first wall portion 20, the second wall portion 30, the top plate portion 40, and The concrete 60 is filled in the lower part in the space S partitioned by the pair of side wall parts, and this is different from the first embodiment in that the lower part of the breakwater 110 has an SC structure.

  The inner surfaces 20a, 30a of the first wall portion 20 and the second wall portion 30, that is, the lower portions of the surfaces facing each other, are respectively studs 21, 31 protruding from the inner surfaces 20a, 30a and the pair of inner surfaces 20a, 30a. A tie bar 22 is provided for connecting the two.

And the area (for example, the up-down direction of the 1st wall part 20 and the 2nd wall part 30) in which these studs 21, 31 and the tie bar 22 in the space S between the 1st wall part 20 and the 2nd wall part 30 were provided. In the lower half area), concrete 60 is placed. The concrete 60 is fixed integrally with the steel plates forming the first wall portion 20 and the second wall portion 30 via the studs 21 and 31 and the tie bar 22.
Moreover, the water storage 50 of the second embodiment is filled in the space S above the concrete 60 between the first wall portion 20 and the second wall portion 30. Thereby, the upper surface of the concrete 60 is in contact with the water storage 50.

  When constructing such a breakwater 110, first, a frame in which the bottom plate portion 10, the first wall portion 20, the second wall portion 30, the top plate portion 40 and the pair of side wall portions are integrally joined to each other at the factory. Manufacture the body. At this time, studs 21 and 31 are provided on part of the inner surfaces 20a and 30a of the first wall portion 20 and the second wall portion 30, and the tie bars 22 that connect the first wall portion 20 and the second wall portion 30 to each other. Is provided. And after mounting such a frame body on the upper surface of the foundation 90 which is the installation place of the breakwater 100 so that the baseplate part 10 may be laminated | stacked, the 1st flange part 11 and the 2nd flange part 12 of the baseplate part 10 are carried out. Is fixed to the basic body 91 by bolting or concrete bonding. And concrete 60 is laid in space S inside a frame, and SC structure is constituted. Thereafter, the water storage 50 is filled into the space S above the concrete 60 between the bottom plate portion 10, the first wall portion 20, and the second wall portion 30 through a supply / discharge hole (not shown). As a result, the breakwater 110 that functions as a water storage tank and plays a role as a breakwater is completed.

In such a breakwater 110 of the second embodiment, as in the first embodiment, both the function as a water storage tank and the role as a breakwater can be taken.
Moreover, since the lower part of the breakwater 110 is made into SC structure which consists of a pair of steel plates and the concrete 60 laid between these steel plates, the robustness in the lower part of the breakwater 100 can be ensured. Therefore, destruction of the breakwater 110 due to the arrival of a tsunami can be avoided as much as possible.

Next, a third embodiment of the present invention will be described with reference to FIG. About this third embodiment, the same code | symbol is attached | subjected to the component similar to 1st embodiment, and detailed description is abbreviate | omitted.
The breakwater 120 of 3rd embodiment is comprised from the 1st wall part 70 provided on the foundation 90, the 2nd wall part 80, the top-plate part 85, and the water storage 50 with which these were filled.

The 1st wall part 70, the 2nd wall part 80, and the top-plate part 85 are each comprised from the concrete.
The 1st wall part 70 is provided in the upper surface of the foundation main body 91 in the foundation 90, and is comprised by the wall shape extended along a coastline. Moreover, the outer surface 71 (surface facing the sea side) of the first wall portion 70 is parallel to the vertical surface, and the inner surface 72 (surface facing the land side) of the first wall portion 70 is directed toward the land side. It is formed so as to incline gradually downward.

  The 2nd wall part 80 is provided in the land side rather than the 1st wall part 70 at intervals with this 1st wall part 70, and is comprised in the wall shape extended along a coastline. In the present embodiment, both the inner surface 81 (the surface facing the sea side) and the outer surface 82 (the surface facing the land side) of the second wall 80 are parallel to the vertical surface, but the outer surface 82 faces the land side. Accordingly, it may be formed so as to be gradually inclined downward.

The top plate portion 85 is provided to connect the upper ends of the first wall portion 70 and the second wall portion 80 to each other.
Note that the first wall portion 70, the second wall portion 80, and the top plate portion 85 are partitioned by the first wall portion 70, the second wall portion 80, and the top plate portion 85 at the end portions along the coastline. Side walls (not shown) for closing the spaces S are provided. This side wall part is also comprised from the concrete like 1st embodiment.
And in the space S between the first wall part 70 and the second wall part 80, that is, the space S partitioned by the first wall part 70, the second wall part 80, the top plate part 85 and the pair of side wall parts. Is filled with water storage 50. The water storage 50 is introduced into the space S through a supply / discharge hole (not shown).

Also in the breakwater 120 of such 3rd embodiment, both the function as a water tank and the role as a breakwater can be taken like 1st embodiment.
Moreover, since the 1st wall part 70 and the said 2nd wall part 80 consist of concrete, respectively, the breakwater 120 provided with the robustness which can endure the 1st wave and 2nd wave of a tsunami can be constructed reliably.

As mentioned above, although embodiment of this invention was described in detail, unless it deviates from the technical idea of this invention, it is not limited to these, A some design change etc. are possible.
For example, in the embodiment, the first wall portions 20 and 70 and the second wall portions 30 and 80 are made of steel plate or concrete, but are not limited to this, and are made of other materials. It may be.
In the embodiment, the breakwaters 100, 110, 120 are installed on the ground 300 facing the ocean 200, but may be installed on the ground 300 facing the river or the coastline.

Furthermore, although the breakwaters 100, 110, and 120 have been described as having a function as a water storage tank in the embodiment, they may have at least a function as a breakwater. That is, the breakwaters 100, 110, and 120 may be used not only as a breakwater but also as a breakwater.
Further, instead of the water storage 50, another liquid such as oil or gel may be filled in the breakwaters 100, 110, 120. In order to disperse the impact force exerted on the first wall portion 20 and reduce the impact force to the second wall portion 30, it is preferable to fill a liquid having a lower viscosity than water as the liquid.

10 bottom plate part 11 first flange part 12 second flange part 20 first wall part 20a inner surface 21 stud 22 tie bar 30 second wall part 30a inner surface 31 stud 40 top plate part 50 water storage (liquid)
60 Concrete 70 First wall portion 71 Outer surface 72 Inner surface 80 Second wall portion 81 Inner surface 82 Outer surface 85 Top plate portion 90 Foundation 91 Foundation body 92 Pile 100 Breakwater 110 Breakwater 120 Breakwater S Space

Claims (8)

A first wall portion erected so as to extend in a direction crossing the traveling direction of the tsunami;
A second wall portion erected so as to face the first wall portion in front of the first wall portion in the traveling direction of the tsunami;
A breakwater comprising: a liquid filled in a space between the first wall portion and the second wall portion.   The breakwater according to claim 1, wherein each of the first wall portion and the second wall portion is made of a steel plate. Comprising concrete filled in the lower part of the space between the first wall and the second wall;
The breakwater according to claim 2, wherein the liquid is filled above the concrete in a space between the first wall portion and the second wall portion.   The breakwater according to claim 2 or 3, wherein a corrosion inhibitor is applied to surfaces of the first wall portion and the second wall portion facing each other.   The breakwater according to claim 1, wherein the first wall portion and the second wall portion are each made of concrete.   The breakwater according to any one of claims 1 to 5, further comprising a top plate portion that connects upper ends of the first wall portion and the second wall portion.   The breakwater according to any one of claims 1 to 6, wherein the liquid is water.   The breakwater according to claim 7, which also functions as a water storage tank.

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