JP2013076303A - Wave force reduction structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave force reduction structure capable of reducing a wave force against a target structure positioned in the traveling direction of a wave.SOLUTION: A wave force reduction structure includes a plurality of wave force resisting structures 15 which are provided on the ocean (wave) side of a target structure 1 in the traveling direction of waves directed toward the target structure 1 provided on land 3 and with which the waves collide. A dike 5 is provided on the ocean (wave) side of the target structure 1 on the land 3, and the wave force resisting structures 15 are provided between the target structure 1 and the dike 5. The wave force resisting structures 15 are arranged in a grid pattern in a square-shaped arrangement area E1.

Description

  The present invention relates to a wave force reducing structure for reducing wave power of a wave such as a tsunami.

  2. Description of the Related Art Conventionally, there is known a protective column structure that protects a structure from drifting objects by a concrete column erected on a foundation in front of the structure (see, for example, Patent Document 1). In this protective column structure, a D-type hollow precast PC column is used as a concrete column. The D-type hollow precast PC column is composed of a sea-side curved part and a land-side straight part. And the curved part on the sea side receives the tsunami wave force.

  Moreover, in evaluating the tsunami wave force, hydraulic experiments relating to tsunami wave force acting on a group of buildings are known (see, for example, Non-Patent Document 1). The building group used in this hydraulic experiment is simulated using 10 cm square wood, and the arrangement pattern of the building group includes a dense arrangement.

JP 2009-13743 A

Charles Shimamora, Yoshinori Sugawara, Koji Fujima, “Hydraulic Experiment on Tsunami Forces Acting on Buildings”, Coastal Engineering Papers, Japan Society of Civil Engineers, 2007, Vol. 54, p. 831-835

  The protective column structure described in Patent Document 1 is a configuration that protects a structure from drifting objects, and the D-type hollow precast PC column receives a wave force caused by a tsunami. As a result, the tsunami that has been swept away reaches the structure without wave power being reduced. For this reason, the structure needs to improve the rigidity of the structure in consideration of directly receiving the wave force of the wave. In this case, the cost for increasing the rigidity of the structure increases.

  In addition, in the building group described in Non-Patent Document 1, when the buildings are densely packed, the building in the front of the tsunami invasion direction (traveling direction) is susceptible to wave power, and the building behind the front building is waved. It is difficult to receive power. However, when each building is not dense, that is, when there is one building, or when a plurality of buildings are arranged in a direction orthogonal to the tsunami invasion direction, the building receives wave power. As a result, the wave force toward the building reaches the building without being reduced. In this case, it is necessary to improve the rigidity of the structure in consideration of receiving the wave force directly. .

  Then, this invention makes it a subject to provide the wave force reduction structure which can reduce the wave force with respect to the target structure in the advancing direction of a wave.

  The wave force reducing structure of the present invention is provided on the wave side of the target structure on the wave traveling direction toward the target structure provided on the land, and includes a plurality of wave-resistant structures that the waves collide with. It is characterized by.

  According to this configuration, a plurality of wave resistant structures can be provided on the wave side of the target structure. For this reason, the wave which goes to a target structure reaches | attains a target structure, after passing a several wave-resistant structure. At this time, the wave collides with each wave resistant structure when passing through the plurality of wave resistant structures. Thereby, the wave force of a wave is reduced by the wave colliding with each wave-resistant structure. As described above, since the plurality of wave resistant structures can reduce the wave force of the waves reaching the target structure, it is possible to suppress the cost for increasing the rigidity of the target structure.

  In this case, it is preferable that the land is provided with a bank on the wave side of the target structure, and the plurality of wave-resistant structures are provided between the target structure and the bank.

  According to this configuration, the wave force of the wave over the bank can be reduced by the plurality of wave-resistant structures after the wave heading toward the target structure is blocked by the bank. For this reason, the wave power of the wave can be further reduced as much as the wave is blocked by the bank.

  In this case, it is preferable that the plurality of wave-resistant structures are arranged in a lattice shape.

  According to this configuration, since the plurality of wave-resistant structures can be arranged in a lattice shape, the wave force of the wave can be reduced stepwise over the traveling direction.

  In this case, it is preferable that the plurality of wave-resistant structures are arranged in a staggered manner.

  According to this configuration, a plurality of wave-resistant structures can be arranged in a staggered manner, so that the wave force of the wave can be reduced stepwise over the traveling direction. At this time, the plurality of wave-resistant structures arranged in a staggered manner have the wave-resistant structures on the front side in the traveling direction between adjacent wave-resistant structures. For this reason, since the wave which passed between adjacent wave-resistant structures collides with the wave-resistant structure of the front side, it becomes possible to reduce the wave force of a wave more.

  In this case, it is preferable that the arrangement area in which the plurality of wave-resistant structures are arranged is a square having one side in the orthogonal direction orthogonal to the wave traveling direction.

  According to this configuration, since a plurality of wave-resistant structures can be arranged in the square arrangement area, the plurality of wave-resistant structures can reduce the wave force in the traveling direction.

  In this case, it is preferable that the arrangement area in which a plurality of wave-resistant structures are arranged is a triangle that protrudes toward the target structure with an orthogonal direction orthogonal to the wave traveling direction as one side.

  According to this configuration, a plurality of wave resistant structures can be arranged in a triangular arrangement area. At this time, since the arrangement area is a triangle that protrudes toward the target structure side, the length in the traveling direction becomes longer as it goes from both sides in the orthogonal direction to the center side. For this reason, the plurality of wave-resistant structures can reduce the wave force of the wave in the traveling direction, and more particularly on the center side in the orthogonal direction of the arrangement area.

  In this case, it is preferable that each wave-resistant structure has a collision surface that is orthogonal to the traveling direction of the waves and on which the waves collide.

  According to this structure, the wave force of a wave can be reduced suitably because a wave collides with the collision surface of a wave-resistant structure.

  In this case, it further includes a plurality of accommodating portions capable of accommodating a plurality of wave resistant structures, and an elevating mechanism that elevates and lowers the plurality of wave resistant structures accommodated in the plurality of accommodating portions. By raising the wave resistant structure, a plurality of wave resistant structures appear from a plurality of accommodating portions, while by lowering a plurality of wave resistant structures, a plurality of wave resistant structures are moved to the plurality of accommodating portions. Is preferably accommodated.

  According to this configuration, a plurality of wave resistant structures can be accommodated in the plurality of accommodating portions. Thereby, when the wave which goes to a target structure does not generate | occur | produce, a some wave-resistant structure can be accommodated in a some accommodating part. On the other hand, when the wave which goes to a target structure generate | occur | produces, a several wave-resistant structure can be made to appear from a some accommodating part, and can be used.

  In this case, it is preferable that each wave-resistant structure is configured to be able to float, and the elevating mechanism has a communication pipe that communicates the plurality of accommodating portions with the ocean.

  According to this configuration, marine seawater flows into the plurality of accommodating portions via the communication pipe. For this reason, when a wave is generated in the ocean, the water pressure in the ocean rises due to the rise in the sea level, and thus the water pressure in each accommodating portion also rises through the communication pipe. Then, each wave-resistant structure accommodated in each accommodating part appears by floating (raising) by water pressure. Thereby, with a simple configuration, a plurality of wave-resistant structures can appear from a plurality of accommodating portions.

  In this case, the elevating mechanism includes a drive unit that raises and lowers the plurality of wave-resistant structures, a detection unit that detects that the wave is directed to the target structure, and a control unit that controls the drive unit based on the detection result of the detection unit. It is preferable to have.

  According to this configuration, the control unit can cause the plurality of wave resistant structures to appear automatically from the plurality of storage units by controlling the drive unit based on the result of the detection unit.

  According to the wave force reducing structure of the present invention, the wave force of a wave can be reduced by a plurality of wave resistant structures, so that the wave force applied to the target structure can be reduced.

FIG. 1 is a plan view schematically illustrating the wave force reducing structure according to the first embodiment. FIG. 2 is a side view schematically illustrating the wave force reducing structure according to the first embodiment. FIG. 3 is a plan view of the wave force reducing structure according to the first modification. FIG. 4 is a plan view of the wave force reducing structure according to the second modification. FIG. 5 is a plan view of the wave force reducing structure according to the third modification. FIG. 6 is a plan view of a wave force reducing structure according to Modification 4. FIG. 7 is a side view schematically illustrating the wave force reducing structure according to the second embodiment. FIG. 8 is a side view of the wave resistant structure during storage according to the second embodiment. FIG. 9 is a side view of the wave-resistant structure at the time of appearance according to the second embodiment. FIG. 10 is a side view schematically illustrating the wave force reducing structure according to the third embodiment.

  Hereinafter, a wave force reducing structure of the present invention will be described with reference to the accompanying drawings. The present invention is not limited to the following examples. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  The wave power reducing structure according to the first embodiment reduces the wave power of the wave toward the target structure. Examples of the target structure include a tank facility, a thermal power plant, a nuclear power plant, a chemical plant, and the like. It is various equipment used for. Hereinafter, the wave force reducing structure will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a plan view schematically illustrating the wave force reducing structure according to the first embodiment, and FIG. 2 is a side view schematically illustrating the wave force reducing structure according to the first embodiment. The target structure 1 is provided on the land 3 along the coast, that is, along the ocean. The target structure 1 is, for example, a tank facility having a circular shape in plan view. A dike 5 is provided on the ocean side of the target structure 1. The levee 5 is a tide embankment provided between the land 3 and the ocean 7. In the first embodiment, a tide bank is applied as the dyke 5. However, a breakwater provided in the ocean 7 may be used. The embankment 5 prevents damage to the target structure 1 on the inland side from waves such as tsunamis or high waves generated on the ocean side. A tsunami is a wave generated by an earthquake, and a high wave is a wave generated by a typhoon or the like. In the first embodiment, the description is applied to waves generated in the ocean 7, but waves generated in a river or a lake may be used.

  The wave force reducing structure 10 is provided between the target structure 1 and the bank 5 in the traveling direction of the wave toward the target structure 1. The traveling direction of the wave is a direction from the ocean 7 to the land 3 (a direction from the right side to the left side in the drawing). The wave force reducing structure 10 includes a plurality of wave resistance structures 15 arranged in a predetermined arrangement area E1.

  The arrangement area E <b> 1 is a square having one side in an orthogonal direction orthogonal to the wave traveling direction. That is, the arrangement area E1 has a square shape in which the orthogonal direction is the width direction and the traveling direction is the depth direction. The arrangement area E <b> 1 is longer in the width direction than in the width direction of the target structure 1.

  The plurality of wave resistant structures 15 are arranged in a lattice shape in the square arrangement area E1. The plurality of wave-resistant structures 15 are composed of, for example, a total of nine in three columns in the width direction and three rows in the depth direction. The distance between adjacent wave-resistant structures 15 is the same as the length of each wave-resistant structure 15 in the width direction. The distance between the adjacent wave-resistant structures 15 is not particularly limited as long as it allows the wave to travel while reducing the wave power.

  Each wave-resistant structure 15 is configured in a rectangular shape that is a square in plan view, and has, for example, a composite structure using steel plates and concrete. Each wave-resistant structure 15 has a space formed therein, and is placed on the inner steel plate 21 provided on the inner side, the stud 22 provided on the outer surface of the inner steel plate 21, and the outer surface of the inner steel plate 21. And concrete 23. In addition, each wave-resistant structure 15 is configured to be smaller than the target structure 1.

  Moreover, each wave-resistant structure 15 has the collision surface 15a where a wave collides. The collision surface 15a is a surface orthogonal to the wave traveling direction, and is formed on the ocean 7 side of each wave-resistant structure 15. Each wave-resistant structure 15 is configured such that the height in the vertical direction is higher than the assumed height of the wave.

  Therefore, for example, when a tsunami occurs on the ocean 7 side due to an earthquake, the generated tsunami rushes toward the land 3 side. If the tsunami that has been struck is a tsunami that exceeds the embankment 5, a part of the tsunami is dammed by the embankment 5, but the other part of the tsunami passes over the embankment 5 and flows into the land 3 side. The wave that has flowed into the land 3 side of the dike 5 flows toward the target structure 1. The wave traveling toward the target structure 1 reaches the target structure 1 after passing through the wave force reducing structure 10. The tsunami collides with the collision surface 15 a of each wave resistant structure 15 when passing through the wave force reducing structure 10. A tsunami collides with each wave-resistant structure 15, and wave power is reduced. Thereby, the tsunami that reaches the target structure 1 becomes a tsunami with reduced wave power.

  As described above, according to the configuration of the first embodiment, a plurality of wave-resistant structures 15 can be provided on the ocean 7 (wave) side of the target structure 1. For this reason, the wave which goes to the target structure 1 is reduced when the wave force collides with each wave-resistant structure 15. From the above, since the plurality of wave-resistant structures 15 can reduce the wave force of the waves that reach the target structure 1, it is possible to suppress the cost for increasing the rigidity of the target structure 1.

  The plurality of wave-resistant structures 15 are provided between the target structure 1 and the bank 5. For this reason, after blocking the wave which goes to the target structure 1 by the bank 5, the wave force of the wave which got over the bank 5 can be reduced by the several wave-proof structure 15. FIG. For this reason, the wave power of the wave can be further reduced by the amount of the wave dammed by the bank 5.

  In addition, since a plurality of wave-resistant structures can be arranged in a grid in the square arrangement area, the wave power of the wave can be reduced step by step in the traveling direction.

  In the first embodiment, each wave-resistant structure 15 of the wave force reducing structure 10 is formed in a square in plan view. However, the configuration is not limited to this configuration, and the configuration of Modification 1 may be used. FIG. 3 is a plan view of the wave force reducing structure according to the first modification. As shown in FIG. 3, the wave-resistant structure 30 of the wave force reducing structure 10 of Modification 1 is formed in a T shape in plan view with a first wall body 31 and a second wall body 32. That is, in the wave-resistant structure 30 of the first modification, the first wall 31 is provided so as to extend in an orthogonal direction orthogonal to the wave traveling direction, and the second wall 32 is the land 3 of the first wall 31. It protrudes from the side in the direction of wave travel. The surface of the first wall 31 on the ocean 7 side is a collision surface 30a.

  In the first embodiment, each wave-resistant structure 15 of the wave force reducing structure 10 is formed in a square shape in plan view. However, the configuration is not limited to this configuration, and the configuration of Modification 2 may be used. FIG. 4 is a plan view of the wave force reducing structure according to the second modification. As shown in FIG. 4, the wave-resistant structure 40 of the wave force reducing structure 10 of Modification 2 is formed in a triangular shape in plan view that protrudes toward the target structure 1 with an orthogonal direction orthogonal to the wave traveling direction as one side. Has been. That is, the wave resistant structure of Modification 2 is formed in a triangular prism shape, and the surface on the ocean 7 side is a collision surface 40a.

  Further, in the wave force reducing structure 10 of the first embodiment, the plurality of wave resistant structures 15 are arranged in a lattice shape, but the configuration is not limited to this configuration, and may be the configuration of the third modification. FIG. 5 is a plan view of the wave force reducing structure according to the third modification. As shown in FIG. 5, in the wave force reducing structure 10 of the third modification, the plurality of wave-resistant structures 15 are arranged in a staggered manner in the square arrangement area E1. That is, the plurality of wave-resistant structures 15 are constituted by, for example, three rows in the depth direction, and the first row has three, the second row has two, and the third row has three from the ocean 7 side. Then, in the traveling direction of the waves, the second wave resistant structure 15 is provided between the adjacent wave resistant structures 15 in the first line, and the adjacent wave resistant structure in the second line. 15 is provided so that the wave-resistant structure 15 in the third row is located. For this reason, since the wave which passed between the adjacent wave-resistant structures 15 collides with the wave-resistant structure 15 on the front side, the plurality of wave-resistant structures 15 are arranged in a zigzag pattern. It becomes possible to further reduce the wave power.

  Further, in the wave force reducing structure 10 of the first embodiment, the plurality of wave resistant structures 15 are arranged in the square arrangement area E1, but the configuration of the fourth modification is not limited to this configuration. FIG. 6 is a plan view of a wave force reducing structure according to Modification 4. As shown in FIG. 6, in the wave force reducing structure 10 of Modification 4, the plurality of wave resistant structures 15 are arranged in a staggered manner in the triangular arrangement area E2. The arrangement area E <b> 2 is formed in a triangular shape that protrudes toward the target structure 1 with an orthogonal direction orthogonal to the wave traveling direction as one side. Since the arrangement area E2 is a triangle that protrudes toward the target structure 15, the length in the traveling direction becomes longer as it goes from both sides in the orthogonal direction to the center side. The plurality of wave-resistant structures 15 are constituted by, for example, three lines in the depth direction, and the first line has three lines, the second line has two lines, and the third line has one line from the ocean 7 side. Then, in the traveling direction of the waves, the second wave resistant structure 15 is provided between the adjacent wave resistant structures 15 in the first line, and the adjacent wave resistant structure in the second line. 15 is provided so that the wave-resistant structure 15 in the third row is located. For this reason, since the arrangement area E2 is a triangle that protrudes toward the target structure 15, the wave force of the wave can be further reduced, particularly on the center side in the orthogonal direction of the arrangement area E2.

  Modifications 1 to 4 may be appropriately combined with each other in accordance with the mode of the wave force reduction structure 10 so that the wave force of the wave can be suitably reduced.

  Next, a wave force reducing structure 50 according to the second embodiment will be described with reference to FIGS. FIG. 7 is a side view schematically illustrating the wave force reducing structure according to the second embodiment. FIG. 8 is a side view of the wave resistant structure during storage according to the second embodiment. FIG. 9 is a side view of the wave-resistant structure at the time of appearance according to the second embodiment. In the second embodiment, only parts different from the first embodiment will be described in order to avoid redundant description. The wave force reducing structure 10 according to the first embodiment has a configuration in which a plurality of wave resistant structures 15 are arranged on the land 3, but the wave force reducing structure 50 according to the second embodiment is a plurality of wave resistant structures 55. Is arranged so that it can be accommodated.

  As shown in FIG. 7, the wave force reducing structure 50 includes a plurality of wave resistance structures 55, a plurality of accommodating portions 56, and an elevating mechanism 57. The wave force reducing structure 50 stores the plurality of wave resistant structures 55 in the plurality of receiving portions 56 by lowering the plurality of wave resistant structures 55 by the lifting mechanism 57. On the other hand, the wave force reducing structure 50 causes the plurality of wave resistant structures 55 to appear from the plurality of accommodating portions 56 by raising the plurality of wave resistant structures 55 by the lifting mechanism 57.

  As shown in FIGS. 8 and 9, the plurality of wave-resistant structures 55 are arranged in a lattice shape in the square arrangement area E <b> 1 as in the first embodiment. Each wave-resistant structure 55 is formed in a rectangular shape that is a square in plan view, and has, for example, a composite structure using steel plates and concrete. Each wave-resistant structure 55 has a space formed therein, and is placed on the inner steel plate 61 provided on the inner side, the stud 62 provided on the outer surface of the inner steel plate 61, and the outer surface of the inner steel plate 61. And concrete 63. At this time, each wave resistant structure 55 is configured to float when the inside of the accommodating portion 56 reaches a predetermined water pressure.

  The wave resistant structure 55 has a flange portion 64 at the lower end thereof. The flange portion 64 is provided so as to protrude in the horizontal direction. A buffer member 65 is provided on the upper surface of the flange portion 64 so as to be sandwiched between an upper stopper 73 of the accommodating portion 56 described later.

  The plurality of accommodating portions 56 are provided according to the plurality of wave resistant structures 55. Each accommodating portion 56 is provided so as to be recessed from the ground surface, and has an accommodating space 71 for accommodating the wave resistant structure 55. On the upper surface of the accommodating portion 56, an entrance / exit 72 for the wave-resistant structure 55 to appear / exit is formed, and an upper stopper 73 is formed on the upper surface around the entrance / exit 72. The upper stopper 73 restricts the rising of the rising wave resistant structure 55. Further, a lower stopper 74 that faces the upper stopper 73 in the vertical direction is formed inside the accommodation space 71 below the accommodation space 71. The lower stopper 74 restricts the descent of the wave-resistant structure 55 that descends.

  The elevating mechanism 57 has a communication pipe 81 that communicates the plurality of accommodating portions 56 with the ocean 7. The communication pipe 81 allows seawater to flow from the ocean 7 toward each housing portion 56. For this reason, when a wave is generated in the ocean 7 and the wave reaches the embankment 5 and the tide level (water level) of the sea rises, the seawater flowing into the accommodating portion 56 through the communication pipe 81 increases. As a result, seawater flows between the bottom portion of the accommodating portion 56 and the bottom portion of the wave-resistant structure 55, so that the water pressure in the accommodating portion 56 increases. When the water pressure in the accommodating part 56 rises, each wave-resistant structure 55 accommodated in each accommodating part 56 floats (rises) by the water pressure. And each wave-resistant structure 55 appears from the ground surface because each wave-resistant structure 55 is position-regulated by the upper stopper 73 of each accommodating part 56. FIG. On the other hand, when the tide level (water level) of the sea is lowered, the water pressure in the accommodation portion 56 is lowered, so that the own weight of the wave-resistant structure 55 is larger than the water pressure in the accommodation portion 56. As a result, the wave resistant structure 55 descends while allowing seawater to flow out to the ocean 7 via the communication pipe 81. And each wave-resistant structure 55 is accommodated in each accommodating part 56 by position-controlling by the lower stopper 74 of each accommodating part 56. FIG.

  As described above, according to the configuration of the second embodiment, when a wave toward the target structure 1 is not generated, the plurality of wave-resistant structures 55 can be accommodated in the plurality of accommodating portions 56 by the lifting mechanism 57. it can. On the other hand, when the wave which goes to the target structure 1 generate | occur | produces, the several wave-resistant structure 55 can be made to appear from the some accommodating part 56, and can be used.

  Next, with reference to FIG. 10, the wave force reducing structure 90 according to the third embodiment will be described. FIG. 10 is a side view schematically illustrating the wave force reducing structure according to the third embodiment. In the third embodiment, only parts different from the second embodiment will be described in order to avoid redundant description. The wave force reducing structure according to the second embodiment uses the communication pipe 81 as the lifting mechanism 57 to raise or lower the plurality of wave resistant structures 55. The wave force reducing structure 90 according to the third embodiment uses the drive unit 101 such as a motor as the elevating mechanism 97 to raise or lower the plurality of wave resistant structures 95.

  As shown in FIG. 10, the plurality of wave-resistant structures 95 are arranged in a grid pattern in the square arrangement area E1 as in the second embodiment. Each wave-resistant structure 95 is configured in a rectangular shape that is a rectangular shape in plan view, and has, for example, a composite structure using steel plates and concrete.

  The plurality of accommodating portions 96 are provided according to the plurality of wave-resistant structures 95 as in the second embodiment. Each accommodating portion 96 is provided so as to be recessed from the ground surface, and accommodates the wave resistant structure 95.

  The elevating mechanism 97 includes a drive unit 101 provided between the bottom of the housing unit 96 and the bottom of the wave-resistant structure 95, a pressure sensor (detection unit) 102 that detects the water pressure of the ocean 7, a drive unit 101, And a control unit 103 connected to the pressure sensor 102.

  The drive unit 101 is driven and controlled by the control unit 103, and raises the wave-resistant structure 95 to the appearance position or lowers the wave-resistant structure 95 to the accommodation position. The pressure sensor 102 detects that a wave toward the target structure 1 has occurred. If the control part 103 detects that the wave which goes to the target structure 1 has generate | occur | produced based on the detection result by the pressure sensor 102, it will raise the wave-resistant structure 95 to an appearance position. On the other hand, if the control part 103 detects that the wave which goes to the target structure 1 has not generate | occur | produced based on the detection result by the pressure sensor 102, the wave-resistant structure 95 will be lowered | hung to an accommodation position. In addition, the control part 103 determines with the wave which goes to the target structure 1 having generate | occur | produced, when the detected pressure detected by the pressure sensor 102 becomes more than the preset preset pressure. On the other hand, the control part 103 determines with the wave which goes to the target structure 1 not having generate | occur | produced when the detected pressure detected by the pressure sensor 102 becomes less than the preset set pressure. In the third embodiment, the pressure sensor is used. However, any sensor may be used as long as it detects that a wave toward the target structure 1 is generated. For example, the vibration of the wave is detected. It may be a vibration sensor.

  As described above, according to the configuration of the third embodiment, when a wave toward the target structure 1 is not generated, the plurality of wave-resistant structures 95 are automatically accommodated in the plurality of accommodating portions 96 by the lifting mechanism 97. can do. On the other hand, when the wave which goes to the target structure 1 generate | occur | produces, the several wave-resistant structure 95 can be made to appear from the some accommodating part 96 automatically, and can be used.

DESCRIPTION OF SYMBOLS 1 Target structure 3 Land 5 Levee 7 Ocean 10 Wave force reduction structure 15 Wave resistant structure 15a Colliding surface 21 Inner steel plate 22 Stud 23 Concrete 30 Wave resistant structure (modification 1)
30a Colliding surface (Modification 1)
31 1st wall body (modification 1)
32 Second wall (Modification 1)
40 Wave resistant structure (Modification 2)
40a Colliding surface (Modification 2)
50 Wave force reduction structure (Example 2)
55 Wave resistant structure (Example 2)
56 Housing 57 Lifting Mechanism 61 Inner Steel Plate (Example 2)
62 Stud (Example 2)
63 Concrete (Example 2)
64 Flange portion 65 Buffer member 71 Accommodating space 72 Entry / exit port 73 Upper stopper 74 Lower stopper 81 Communication pipe 90 Wave force reducing structure (Example 3)
95 Wave resistant structure (Example 3)
96 container (Example 3)
97 Lifting mechanism (Example 3)
101 Drive Unit 102 Pressure Sensor 103 Control Unit E1 Arrangement Area E2 Arrangement Area

Claims (10)

  Wave power reduction characterized by comprising a plurality of wave resistant structures provided on the wave side of the target structure on the wave traveling direction toward the target structure provided on the land, and the waves collide with each other Construction. The land is provided with a dike on the wave side of the target structure,
The wave force reducing structure according to claim 1, wherein the plurality of wave resistant structures are provided between the target structure and the levee.   The wave force reducing structure according to claim 1 or 2, wherein the plurality of wave-resistant structures are arranged in a lattice pattern.   The wave force reducing structure according to claim 1 or 2, wherein the plurality of wave resistant structures are arranged in a staggered manner.   5. The arrangement area according to claim 1, wherein the arrangement area where the plurality of wave-resistant structures are arranged is a rectangle having an orthogonal direction orthogonal to the traveling direction of the wave as one side. The wave power reduction structure described.   The arrangement area in which the plurality of wave-resistant structures are arranged is a triangle that protrudes toward the target structure with an orthogonal direction orthogonal to the wave traveling direction as one side. 5. The wave force reducing structure according to any one of items 4 to 4.   7. The wave force reduction according to claim 1, wherein each wave-resistant structure has a collision surface that is orthogonal to a traveling direction of the wave and that the wave collides with. Construction. A plurality of accommodating portions capable of accommodating the plurality of wave-resistant structures;
An elevating mechanism for elevating and lowering the plurality of wave resistant structures accommodated in the plurality of accommodating portions,
The lifting mechanism raises the plurality of wave resistant structures by raising the plurality of wave resistant structures, while causing the plurality of wave resistant structures to appear from the plurality of accommodating portions, The wave force reducing structure according to claim 1, wherein the plurality of wave resistant structures are accommodated in the plurality of accommodating portions. Each wave resistance structure is configured to be levitated,
The lifting mechanism is
The wave force reducing structure according to claim 8, further comprising a communication pipe that communicates the plurality of accommodating portions with the ocean. The lifting mechanism is
A drive unit for raising and lowering the plurality of wave-resistant structures;
A detection unit for detecting that the wave is directed to the target structure;
The wave force reducing structure according to claim 8, further comprising: a control unit that controls the drive unit based on a detection result of the detection unit.

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