JP2017096091A - Overtopping wave attenuating structure, breakwater structure having the same, and overtopping wave attenuating method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an overtopping wave attenuating structure that can attenuate overtopping waves to the breakwater and minimize the damage caused therefrom, and relate to a breakwater structure including this.SOLUTION: An overtopping wave attenuating structure of the present invention comprises: multiple overtopping wave attenuating plates installed at the upper side of the breakwater adjacent to the open sea side, and being respectively isolated at predetermined intervals to secure a clearance of enabling the seawater of the overtopping waves to pass and forming multiple layers; and many supporting columns installed on the top surface of the breakwater, and supporting the overtopping wave attenuating plates so that the multiple overtopping wave attenuating plates may be installed by forming intervals. The overtopping wave attenuating structure further comprises an overtopping wave guide plate connected to one end of at least one or more among multiple overtopping wave attenuating plates so as to be directed downward, further having a gradient larger than the gradient of the overtopping wave attenuating plate, and thereby guiding the seawater passing through the space between the overtopping wave attenuating plates to the inside lower part of the breakwater.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a structure for overtopping attenuation capable of attenuating overtopping on a breakwater and minimizing damage caused thereby, and a breakwater structure including the same.

  Generally, breakwaters are almost always installed at harbors and coasts.

  The breakwater at the beginning of the period was installed at a height that could prevent some high waves, and the section where the breakwater was installed was cut off so that it would be the inland sea and the open sea. However, when the breakwater is constructed in such a way that the seawater is confined in this way, the inflow and outflow of the seawater is not smoothly performed, the seawater on the inland sea side is polluted, various filths are piled up, and a bad smell is generated in severe cases . As a result, it is no exaggeration to say that the tidal flats on the inland sea and the ecosystem on the seabed were completely destroyed.

  For these reasons, recent breakwaters have been installed by various construction methods that minimize the damage of the inland sea due to wave energy and smooth outflow and inflow of seawater between the open sea and the inland sea. .

  On the other hand, when seawater collides with the breakwater, a large repulsive force is generated in the seawater, and the seawater that subsequently pushes one after another is combined and struck against the breakwater with even greater energy. At this time, if the height of the breakwater is high, the energy generated by the repulsive force can cause damage to the breakwater. If the height of the breakwater is low, the waves rising upward due to the repulsive force Overtopping, and overtopping occurs. Here, wave overtopping is a phenomenon in which a wave that hits a breakwater and then a wave that rises above the breakwater.

  It is necessary to allow overtopping to some extent in order for the breakwater to minimize damage on the inland sea side by waves and to reduce its own damage, but overtopping has considerable energy due to the repulsive force generated by hitting the breakwater. In order to reduce the damage caused by overtopping, it is necessary to attenuate the energy of overtopping.

Korean Published Patent No. 10-2004-0006610

  An object of the present invention is to provide a structure for overtopping attenuation capable of attenuating overtopping energy and minimizing damage caused thereby, and a breakwater structure including the same.

  Another object of the present invention is to provide a method for attenuating overtopping using a structure for overtopping attenuation.

  In order to solve the above-described object, the present invention is installed on the upper side of the breakwater adjacent to the open sea side, but the plurality of layers are separated by a predetermined interval so as to secure a space through which the oversea water can pass. A structure for overtopping attenuation comprising a plurality of overtopping attenuation plates and a plurality of support columns that are installed on an upper surface of the breakwater and support the overtopping damping plates so that the plurality of overtopping attenuation plates are installed at intervals. Offer things.

  According to an aspect of the present invention, the plurality of overtopping attenuation plates may be installed in parallel in the horizontal direction.

  According to another feature of the present invention, the plurality of overtopping attenuation plates may be installed so as to be inclined from the direction of the open sea side to the direction of the inland sea side. In this case, all of the plurality of overtopping attenuation plates may be installed in parallel or may have other gradients.

  According to still another aspect of the present invention, the plurality of overtopping attenuation plates may be installed such that the gradient of the overtopping attenuation plate increases from the lower layer to the upper layer.

  According to still another aspect of the present invention, the length of the plurality of support columns can be adjusted. In this case, the overtopping attenuation structure includes an energy measuring device for measuring wave energy, and the energy measuring device. The length control device may further include a length control device that controls a length of the plurality of support columns based on a value measured by the method and adjusts an angle of the overtopping attenuation plate.

  According to still another aspect of the present invention, the overtopping attenuation structure is connected to at least one of the plurality of overtopping attenuation plates so as to be directed downward, and further than the gradient of the overtopping attenuation plate. By having a large gradient, it may further include an overtopping guide plate for guiding seawater passing through the space between the overtopping attenuation plates to the inside and below the breakwater.

  According to another aspect of the present invention, the overtopping attenuation structure may further include an auxiliary guide plate that is vertically installed at a terminal end of the overtop guide plate.

  In order to solve the above-mentioned object, the present invention provides a foundation ground installed on the seabed, a breakwater wall installed on the foundation ground, and a structure for overtopping attenuation installed on an upper surface of the breakwater wall. Provide breakwater structures including Here, the overtopping attenuation structure is connected to at least one end of at least one of the overtopping attenuation plates so as to be directed downward, and has a larger gradient than the overtopping attenuation plate, There may be further included an overtopping guide plate that guides seawater passing through the space between the overtopping attenuation plates to the lower side inside the breakwater wall.

  On the other hand, the breakwater wall includes a front breakwater wall formed by laminating a plurality of unit structures on the side facing the open sea on the foundation ground, and a plurality of the unit structures on the side facing the inland sea on the foundation ground. A wave breaker wall that is separated from the front breakwater wall by a predetermined distance, and the wave overtopping structure is disposed at a lower end of at least one of the wave overtopping plates. The seawater passing through the space between the overtopping attenuation plates is guided to the lower side inside the rear breakwater wall or connected to the frontal breakwater wall by having a slope that is connected in a direction that is greater than the slope of the overtopping attenuation plate. And a wave overtopping plate for guiding to a space between the wall and the rear breakwater wall.

  In order to solve the above-described object, the present invention (a) classifies the range of wave energy into a plurality of stages, and matches and stores the angle of the overtopping attenuation plate corresponding to each stage; (B) a step of measuring wave energy, (c) a step of determining which of the steps of the step (a) the value of the wave energy to be measured corresponds to, The lengths of the plurality of support columns are controlled, and the angle of the wave overtopping attenuation plate is adjusted to correspond to the step of determining in the step (c) so that the overwater seawater is guided to the lower inside of the breakwater. An overtopping attenuation method including the step of:

  Here, in the step (d), the length of the support column can be controlled such that the greater the value of the wave energy measured in the step (b), the smaller the gradient of each of the plurality of overtopping attenuation plates. .

  According to the present invention, by installing the overtopping attenuation structure on the upper side of the breakwater, it is possible to reduce the damage on the inland sea side due to overtopping, and in particular, the overtopping attenuation structure attenuates overtopping energy. Since the direction can be changed to the lower side inside the breakwater, damage caused by overtopping can be minimized.

  Further, according to the present invention, in the case of a breakwater that has already been installed, damage to the overtopping can be reduced only by separately installing a structure for overtopping attenuation, so that an effect of cost saving can be obtained.

It is a perspective view of a breakwater structure by one embodiment of the present invention. It is a sectional side view of the breakwater structure shown in FIG. It is a perspective view which shows an example of the unit structure applied to the breakwater structure shown in FIG. It is a figure which shows the various examples of the structure for wave overtopping attenuation by this invention. It is a figure which shows the various examples of the structure for wave overtopping attenuation by this invention. It is a figure which shows the various examples of the structure for wave overtopping attenuation by this invention. It is a figure which shows the various examples of the structure for wave overtopping attenuation by this invention. It is a sectional side view of the breakwater structure by other embodiment of this invention. It is a figure which shows the example which adjusts the length of the support pillar of the structure for wave overtopping attenuation by embodiment of this invention. It is a flowchart which shows the overtopping attenuation method by embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiment described below is for explaining in detail so that a person having ordinary knowledge in the technical field to which the present invention belongs can easily carry out the invention, thereby limiting the protection scope of the present invention. It does not mean to be done. In describing various embodiments of the present invention, the same reference numerals are used for components having the same technical characteristics.

  1 is a perspective view of a breakwater structure according to an embodiment of the present invention, FIG. 2 is a side sectional view of the breakwater structure shown in FIG. 1, and FIG. 3 is applied to the breakwater structure shown in FIG. FIG. 4 to FIG. 7 are views showing various examples of overtopping attenuation structures according to the present invention.

  1 and 2, a breakwater structure 100 according to an embodiment of the present invention includes a foundation ground 110, a breakwater wall, and an overtopping attenuation structure 170. Here, the breakwater wall may be formed by stacking the unit structures 120, and may have a structure including the front breakwater wall 140 and the rear breakwater wall 150, or a structure further including the basic breakwater wall 130. In addition, the breakwater structure may further include a cover layer 160.

  Although the foundation ground 110 is installed on the seabed, the foundation ground 110 is constructed by foundation construction on the bottom of the sea. The foundation ground 110 is installed after digging a groove of a predetermined depth on the sea bottom, or a lower fixed core 112 having a predetermined length is installed on the bottom of the foundation ground 110, and the corresponding fixed core 112 is inserted into the sea floor. Then, after fixing the foundation ground 110 to the seabed, the upper surface of the foundation ground 110 can be flattened. The shape and installation method of the foundation ground 110 are not particularly limited, and various commonly used shapes and methods can be applied. Further, the foundation ground 110 is made of, but is not limited thereto, and various materials can be used.

  As the breakwater wall, all those generally used in breakwater structures can be applied. In addition, the breakwater wall can be formed by stacking unit structures 120 as shown in FIGS. 1 to 3.

  Referring to FIG. 3, the unit structure 120 includes a block upper plate 121, a block lower plate 122, and at least one pillar 123 that supports the block upper plate 121 on the block lower plate 122. Each of the block lower plates 122 is formed with at least one through hole 124. At this time, the block upper plate 121 and the block lower plate 122 may be formed in the same size. Here, each of the block upper plate 121 and the block lower plate 122 is formed of a rectangle whose length of one side is n times the length of the other side (where n is an integer of 2 or more). In this case, that the block upper plate 121 and the block lower plate 122 are formed in the same size means that the horizontal and vertical lengths thereof are the same, and the respective thicknesses are formed different from each other. obtain. The block upper plate 121 and the block lower plate 122 each have a square shape, and in this case, a connecting groove 125 having a depth and a length set at a half point of each side is formed in a direction perpendicular to the side. Can be done.

  Meanwhile, the unit structure 120 may further include at least one intermediate plate 126. At this time, the intermediate plate 126 has the same size and shape as the block upper plate 121 and the block lower plate 122, is installed in parallel between the block upper plate 121 and the block lower plate 122, and is supported by the pillar 123.

  The block upper plate 121, the block lower plate 122, and the intermediate plate 126 are cut into a cylindrical shape having a diameter set around at least one of the vertices of the corners and ½ points of the side whose length is double. It is done. That is, when one side of the block upper plate 121, the block lower plate 122, and the intermediate plate 126 is twice the other side, a cylindrical shape is formed at a half point of the side where the vertex and length of each corner are twice. Are formed.

  As described above, the breakwater wall has a structure including a front breakwater wall 140 and a rear breakwater wall 150 or a structure further including a basic breakwater wall 130.

  Here, the foundation breakwater wall 130 is formed by laminating a plurality of unit structures 120 on the upper surface of the foundation ground 110. In this case, the basic breakwater wall 130 is arranged such that a plurality of unit structures 120 are overlapped in half in the longitudinal direction so that bricks are stacked to build a building, or at least one other in the longitudinal half. The unit structures 120 may be arranged so as to overlap in the short direction to form a single layer, and such layers may be stacked into a plurality of layers to form the basic breakwater wall 130.

  The front breakwater wall 140 is formed by laminating a plurality of unit structures 120 on the side of the foundation ground 110 facing the open sea. In this case, the front breakwater wall 140 may be formed on the side of the upper surface of the basic breakwater wall 130 toward the open sea after the basic breakwater wall 130 is constructed on the upper surface of the foundation ground 110. At this time, the front breakwater wall 140 may be formed on the outer sea side of the upper surface of the basic breakwater wall 130 with a width smaller than ½ of the width of the basic breakwater wall 130.

  The rear breakwater wall 150 is formed by stacking a plurality of unit structures 120 on the side of the foundation ground 110 facing the inland sea. In this case, the rear breakwater wall 150 may be formed apart from the front breakwater wall 140 by a set distance or more. That is, the rear breakwater wall 150 is laminated so as to form a space having a width equal to or larger than the set width between the rear breakwater wall 140. The rear breakwater wall 150 is set from the front breakwater wall 140 on the side facing the inland sea on the upper surface of the basic breakwater wall 130 after the foundation breakwater wall 130 is constructed on the upper surface of the foundation ground 110 in the same manner as the front breakwater wall 140. It can also be formed at a distance more than a certain distance. At this time, the rear breakwater wall 150 may be formed on the inner sea side of the upper surface of the foundation breakwater wall 130 with a width smaller than ½ of the width of the foundation breakwater wall 130. For reference, FIGS. 1 and 2 show a case where the rear breakwater wall 150 is formed at the same height as the front breakwater wall 140, but the rear breakwater wall 150 is formed lower or higher than the front breakwater wall 140. obtain.

  The covering layer 160 is placed on the upper surfaces of the front breakwater wall 140 and the rear breakwater wall 150 to cover the upper surfaces of the front breakwater wall 140 and the rear breakwater wall 150. The covering layer 160 prevents seawater from rising from the inside of the breakwater structure and can be used as a human road and a roadway. Such a cover layer 160 is made of a concrete material, but is not limited thereto, and various materials can be applied. For example, the cover layer 160 may be formed of a transparent acrylic plate having a predetermined thickness, and thus can be realized so that the distribution process of seawater inside the breakwater can be visually confirmed.

  The overtopping attenuation structure 170 is installed on the upper surface of the portion adjacent to the outer sea side of the breakwater. For example, as shown in FIGS. 1 and 2, the overtopping attenuation structure 170 is installed on the upper surface of the front breakwater wall 140 adjacent to the open sea side.

  The overtopping attenuation structure 170 includes a plurality of overtopping attenuation plates 172 and a plurality of support columns 174, and may further include an overtopping guide plate 176.

  The plurality of wave overtopping attenuation plates 172 are separated from each other by a predetermined interval so as to secure a space through which overwater seawater can pass, and a plurality of support columns 174 are installed on the top surface of the breakwater wall. A plurality of overtopping attenuation plates 172 are supported such that the overtopping attenuation plates 172 are installed with a predetermined height difference.

  In this case, the plurality of overtopping attenuation plates 172 can be installed in parallel in the horizontal direction as shown in FIG. In contrast, the plurality of overtopping attenuation plates 172 may be installed so as to incline from the direction of the open sea to the direction of the inland as shown in FIGS. 1 and 4 to 6. 172 may be installed in parallel or may have different slopes. Further, the plurality of overtopping attenuation plates 172 can be installed such that the gradient of each overtopping attenuation plate increases from the lower layer to the upper layer.

  For example, as shown in FIG. 4, the plurality of overtopping attenuation plates 172 may be installed at different heights and inclined at the same angle. In this case, the plurality of support columns 174 support the wave overtopping attenuation plates 172 in parallel with each other with the plural wavetop attenuation plates 172 having different heights from the upper surface of the front breakwater wall 140. At this time, the interval between the overtopping attenuation plates 172 may be the same or different from each other.

  In contrast, as shown in FIGS. 5 and 6, the plurality of overtopping attenuation plates 172 may be installed at different heights and inclined at different angles. In this case, the multiple support columns 174 support the overtopping attenuation plates 172 such that the plurality of overtopping attenuation plates 172 have different heights from each other with respect to the upper surface of the front breakwater wall 140 and are inclined at different angles. At this time, the plurality of overtopping attenuation plates 172 can be installed such that the gradient of each overtopping attenuation plate increases from the lower layer to the upper layer, thereby increasing the tilt angle of the overtopping attenuation plate 172 disposed at the highest position. Become. The overtopping attenuation plate 172 is made of various materials such as metal, concrete, and synthetic resin.

  Further, as shown in FIG. 7, the plurality of overtopping attenuation plates 172 can be installed horizontally in parallel with each other. In this case, the plurality of support pillars 174 support the wave overtopping plates 172 in parallel with each other at different heights with respect to the upper surface of the front breakwater wall 140.

  The overtopping guide plate 176 is installed so as to be connected downward to at least one of the overtopping attenuation plates 172. In this case, the overtopping guide plate 176 has a larger slope than the overtopping attenuation plate 172, thereby guiding the seawater passing through the space between the overtopping attenuation plate 172 to the lower inside of the breakwater.

  That is, as shown in FIG. 8, the overtopping guide plate 176 is connected to one end of a plurality of overtopping attenuation plates 172, and the overtopping guide plate 176 has a larger gradient than the overtopping attenuation plate 172. As a result, the overpowered seawater passes through the space between the overtopping attenuation plates 172 and the energy is first-order attenuated, and the seawater that has passed thereafter collides with the overtopping guide plates 176 and the energy is secondarily attenuated. Since 176 is inclined downward, it is not repelled in the reverse direction of the approach direction and is guided to the lower inside of the breakwater. For reference, when the breakwater wall is composed of the front breakwater wall 140 and the rear breakwater wall 150 as shown in FIG. 8, the overwhelmed seawater is guided to the space between the front breakwater wall 140 and the rear breakwater wall 150. obtain. In such a process, overtopping energy is significantly attenuated.

  Although FIG. 8 shows only the case where the overtopping guide plate 176 is connected when the overtopping attenuation plate 172 is formed horizontally and in parallel, the overtopping attenuation plate 172 is inclined as shown in FIGS. It is naturally possible to apply the overtopping guide plate 176, and additional description is omitted to avoid redundant description.

  For reference, although not shown in the drawings, an auxiliary guide plate that is vertically installed at the terminal end of the overtopping guide plate 176 may be connected. As a result, the seawater guided by the overtopping guide plate 176 once again hits the auxiliary guide plate and falls directly below.

  On the other hand, as shown in FIG. 9, the lengths of a large number of support columns 174 can be adjusted. This is because the intervals and gradients of the overtopping attenuation plates 172 are adjusted by adjusting the lengths of the large number of support columns 174. In this case, the length of the lowermost support column can be adjusted. Further, the support column installed on the outer sea side among the many support columns 174 can realize a larger range of the length to be adjusted than the support column installed on the inland sea side. In this case, when adjusting the length of each support pillar 174, it can also be adjusted so that the length may become proportionally large as it goes to the open sea side by the installed position. In this case, each support column 174 may be rotatably connected to each overtopping attenuation plate 172, because when adjusting the length of the lowermost support column, thereby supporting each overtopping attenuation plate 172. This is because the angle formed by the pillars 174 can be easily changed.

  The breakwater structure 100 according to the embodiment of the present invention may further include an energy measurement device 180 and a length control device 190.

  The energy measuring device 180 measures wave energy. At this time, the energy measuring device 180 can measure the strength of the wave force hitting the breakwater. In this case, the energy measuring device 180 measures the wave energy for a set time and selects the largest value among the measured values, or the average of the wave energy measured for the set time. A value can be calculated.

  The length control device 190 controls the length of the support column, for example, the length of the lowermost support column 174 based on the value measured by the energy measuring device 180. At this time, the length control device 190 can classify the range of the wave energy into a plurality of stages, and match and store the angle of the overtopping attenuation plate 172 corresponding to each stage. In this case, the length control device 190 determines which step the wave energy value measured by the energy measuring device 180 corresponds to, and controls the length of the lowermost support column 174 corresponding to the determination step. Can do. At this time, the length control device 190 performs control so that the angle of the overtopping attenuation plate 172 becomes smaller as the value of the wave energy measured by the energy measuring device 180 becomes larger, and the force that the overtopping attenuation structure 170 receives from the wave energy. Can be reduced.

  The overtopping attenuation structure 170, the energy measuring device 180, and the length control device 190 as described above can be realized as a structure and device independent of the breakwater structure 100.

  In the breakwater structure according to the embodiment of the present invention as described above, the overtopping attenuation structure 170 is installed on the upper stage of the front breakwater wall 140 to weaken the energy of the overtopped seawater, and the overtopped seawater is reduced to the front breakwater wall 140. The damage on the inland sea side due to overtopping is minimized by directing it to the space behind. Further, by adjusting the angle of the wave overtopping attenuation plate 172 according to the wave energy hitting the breakwater structure, the amount of wave overtopping over the wall can be minimized according to the size of the wave energy.

  FIG. 10 is a flowchart showing the overtopping attenuation method according to the embodiment of the present invention.

  Referring to FIG. 10, first, the range of wave energy is classified into a plurality of stages, and the angle of the overtopping attenuation plate 172 is matched and stored corresponding to each classified stage (S110). At this time, as shown in FIGS. 5 and 6, when the angles of inclination of the overtopping attenuation plates 172 are different from each other, the length control device 190 has the highest overtopping attenuation plate corresponding to each wave energy stage. 172 angles can be matched and stored.

  Thereafter, the energy measuring device 180 measures the wave energy (S120). At this time, the energy measuring device 180 measures the wave strength that hits the breakwater for a set time interval, and calculates the average of the measured values or selects the strongest strength value among the measured values. obtain.

  After that, the length controller 190 determines which of the stages in which the value of the wave energy measured by the energy measuring device 180 falls (S130).

  Thereafter, the length controller 190 controls the length of the support column 174 at an angle corresponding to the stage corresponding to the value of the wave energy measured by the energy measuring device 180, and adjusts the angle of the overtopping attenuation plate 172 (S140). ). At this time, it is preferable that the length control device 190 performs control so that the angle of the overtopping attenuation plate 172 decreases as the value of the wave energy measured by the energy measuring device 180 increases.

DESCRIPTION OF SYMBOLS 100 Breakwater structure 110 Foundation ground 120 Unit structure 130 Basic breakwater wall 140 Front breakwater wall 150 Back breakwater wall 160 Cover layer 170 Structure for overtopping attenuation 172 Overtopping attenuation plate 174 Support column 180 Energy measuring device 190 Length control device

Claims (16)

A plurality of wave overtopping plates installed on the upper side of the breakwater adjacent to the open sea side, each of which is separated by a predetermined interval so as to ensure a space through which overwater seawater can pass,
An overtopping attenuation structure including a plurality of support columns installed on an upper surface of the breakwater and supporting the overtopping attenuation plates so that the plurality of overtopping attenuation plates are installed at intervals.   2. The overtopping attenuation structure according to claim 1, wherein the plurality of overtopping attenuation plates are installed in parallel in the horizontal direction.   2. The overtopping attenuation structure according to claim 1, wherein the plurality of overtopping attenuation plates are installed so as to incline from an open sea side direction to an inland sea side direction.   The overtopping attenuation structure according to claim 3, wherein the plurality of overtopping attenuation plates are installed in parallel.   4. The overtopping attenuation structure according to claim 3, wherein each of the plurality of overtopping attenuation plates is installed to have another gradient. 5.   6. The overtopping attenuation structure according to claim 5, wherein the plurality of overtopping attenuation plates are installed such that the gradient of the overtopping attenuation plate increases from the lower layer to the upper layer.   4. The overtopping attenuation structure according to claim 3, wherein the length of the plurality of support columns is adjustable.   An energy measuring device for measuring wave energy; and a length control device for controlling the length of the plurality of support columns based on a value measured by the energy measuring device and adjusting an angle of the wave overtopping attenuation plate. The structure for overtopping attenuation according to claim 7.   Seawater passing through the space between the overtopping attenuation plates is connected to one end of at least one of the overtopping attenuation plates so as to be directed downward, and has a gradient larger than the gradient of the overtopping attenuation plates. 9. The overtopping attenuation structure according to any one of claims 1 to 8, further comprising an overtopping guide plate that guides the bottom of the breakwater to the inside and below the breakwater.   The overtop attenuation structure according to claim 9, further comprising an auxiliary guide plate that is vertically installed at a terminal end of the overtop guide plate. The foundation ground installed on the sea floor;
A breakwater wall installed on the foundation ground;
A breakwater structure including the overtopping attenuation structure according to any one of claims 1 to 8, which is installed on an upper surface of the breakwater wall.   The overtopping attenuation structure is connected to at least one end of at least one of the overtopping attenuation plates so as to be directed downward, and has a larger gradient than the overtopping attenuation plate, thereby the overtopping attenuation plate. The breakwater structure according to claim 11, further comprising an overtopping guide plate for guiding seawater passing through the space between the breakwater wall and the inside of the breakwater wall.   The breakwater wall includes a front breakwater wall formed by laminating a plurality of unit structures on the side facing the open sea on the foundation ground, and a plurality of unit structures laminated on the side facing the inland sea on the foundation ground. The breakwater structure according to claim 11, further comprising a rear breakwater wall formed at a predetermined distance from the front breakwater wall.   The overtopping attenuation structure is connected to at least one end of at least one of the overtopping attenuation plates so as to be directed downward, and has a larger gradient than the overtopping attenuation plate, thereby the overtopping attenuation plate. And further including an overtop guide plate for guiding the seawater passing through the space between the front breakwater wall and the front breakwater wall to the space between the front breakwater wall and the rear breakwater wall. Item 14. A breakwater structure according to item 13. A plurality of wave overtopping attenuation plates, which are installed on the upper side of the breakwater adjacent to the open sea side and are separated by a predetermined interval so as to secure a space through which overwater seawater can pass, and the plurality of wave overtopping attenuations A number of support columns that support the overtopping attenuation plate so that the plates are installed at an interval, an energy measuring device that measures wave energy, and a length of the plurality of support columns is controlled to control the overtopping attenuation. A length control device capable of adjusting the angle of the plate, and an overtopping induction plate connected downward to at least one of the plurality of overtopping attenuation plates and having a gradient greater than the gradient of the overtopping attenuation plate In the overtopping attenuation method using the overtopping attenuation structure including
(A) classifying the range of wave energy into a plurality of stages, and matching and storing the angle of the overtopping attenuation plate corresponding to each stage;
(B) measuring wave energy;
(C) determining which of the stages of the step (a) the value of the wave energy to be measured corresponds to;
(D) The length of the plurality of support columns is controlled to adjust the angle of the wave overtopping attenuation plate so as to correspond to the step of determining in the step (c), and the overwater seawater is guided downward inside the breakwater. A method of overtopping attenuation, including a step to allow   In the step (d), the length of the support column is controlled so that the gradient of each of the plurality of overtopping attenuation plates decreases as the value of the wave energy measured in the step (b) increases. The wave overtopping attenuation method according to claim 15.

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