JP5859327B2 - Undulating wave breaker - Google Patents

Description

  The present invention relates to an undulating wavebreaker.

  Conventionally, a wave breaker plate that can be raised and lowered by a rotating support part fixed on the breakwater between a lying posture that can be used as a walkway along a substantially horizontal plane and a standing posture that protrudes upward to prevent waves. (Gate) is provided. And there exists a undulation type wave-proof device provided with the undulation drive device which raises and lowers this wave-breaking plate between a lying posture and an upright posture (refer to patent documents 1).

  In addition, a foundation having a swinging support portion (hinge) that can swing horizontally in the axis is provided on the seabed at a point where the progress of the tsunami is to be prevented. And the water stop board (gate) provided with the rocking | fluctuation support part (hinge) which functions by combining with the rocking | fluctuation support part on this foundation is arrange | positioned by making the side with a rocking | fluctuation support part into a land side. Furthermore, there is a tsunami breakwater provided with a water stop plate standing posture holding mechanism (such as a retaining belt) that stabilizes the water stop plate when standing (see Patent Document 2).

  Since the standing wave breaker of Patent Document 1 supports the wave breaker plate by a rotation support portion (hinge) so that it can be raised and lowered, a plurality of hinge fittings are respectively attached to the wave breaker side and the breakwater side. Since a hinge shaft for connecting both metal fittings is also required, there is a problem that the hinge structure is complicated and the number of parts increases. In addition, since the undulation of the wave preventing plate is performed by an undulation drive device such as a hydraulic cylinder, there is a problem that the cost of the device is increased and a backup at the time of a power failure is also required.

  In the tsunami breakwater of Cited Reference 2, the waterstop plate falls near the seabed in normal times, and when the tsunami arrives, the waterstop plate automatically stands up due to the wave force of the tsunami. It is unnecessary. However, since the water stop plate is supported by the swing support portion (hinge) so as to be raised and lowered, there is a problem that the hinge structure is complicated and the number of parts is increased as in the case of the cited document 1. Moreover, in order to make it easy for the tsunami water flow to flow below the water stop plate at the time of lodging, it is necessary to maintain the elevation angle of the water stop plate by the base side protrusion for starting the water stop plate. In order to omit this foundation side protrusion, a technique is disclosed in which a gap is formed on the lower surface of the water stop plate to facilitate the flow of the tsunami water flow below the water stop plate. There is a problem that can only deal with.

  In order to solve such a problem, the present applicant eliminates the need for a hinge fitting of the door body (gate) (hingeless type), makes a simple support structure with a small number of parts, and pulls even a push wave. An undulating wave breaker capable of handling waves was proposed (Patent Document 3).

  As shown in FIGS. 16 (a) and 16 (b), the undulation-type wave breaker has a lying position D that falls in a substantially parallel state with respect to the water bottom surface 2 that is a substantially horizontal flat surface, and a water bottom surface 2. A door body 1 is provided that can swing in a standing position U1 (see FIGS. 17A and 17B) and U2 [see FIGS. 18A and 18B] that rise in a substantially vertical state.

  In the door body 1, one end portion 1 a that receives wave force in the pushing wave direction a and the other end portion 1 b that receives wave force in the pulling wave direction b are set above the water bottom surface 2, respectively. , 1b and the lower surface 1d contacting the water bottom surface 2 are formed in a substantially arcuate shape or a trapezoidal shape downward in a side view. In addition, in each figure, the upper surface 1c is also formed in the upward substantially arcuate shape or the substantially trapezoidal shape in a side view (a leaf shape in a side view).

  Further, one end 4a is connected to the water bottom 2 in the push wave direction a, and the other end 4b is connected to the vicinity of the other end 1b of the door body 1 to support the other end 1b of the door body 1 so as to be swingable. A first fixing belt 4 is provided.

  Further, one end 5a is connected to the bottom surface 2 in the wave pulling direction b, and the other end 5b is connected to the vicinity of the one end 1a of the door body 1 to support the one end 1a of the door body 1 so as to be swingable. The fixed belt 5 is provided.

  Further, the first holding member (holding belt) 6 that holds the door body 1 in the standing position U1 against the wave force in the pushing wave direction a and the door body 1 against the wave force in the drawing wave direction b. A second holding member (holding belt) that is held at the standing position U2 is provided.

  According to this undulation type wave breaker, the door body 1 (gate) is in the normal position of FIGS. 16 (a) and 16 (b). ), The navigation of the ship (see reference numeral 34 in FIG. 4) is not affected.

  When a push wave is generated by a tsunami, storm surge, secondary vibration, etc., the wave force in the push wave direction a is between the one end 1a of the door body 1 and the bottom surface 2 as shown in FIGS. Flows into the gap (elevation angle) f [see FIG. 16 (b)], a couple of forces is generated upward at one end 1a of the door body 1 and downward at the other end 1b.

  At this time, since the lower surface 1d of the door body 1 is substantially arcuate, the fulcrum and the center of gravity of the door body 1 gradually move in the direction of the other end portion 1b from the fall position D of the two-dot chain line. It naturally rises up to a predetermined standing angle (for example, about 30 degrees) while rolling on the water bottom 2. When the fulcrum and the center of gravity move to the other end portion 1b, the other end portion 1b is connected to the first fixing belt 4, so that the door body 1 rotates around the other end portion 1b ( (See arrow Q). That is, the door body 1 rotates to the standing position (for example, about 90 degrees) U1 after rolling from the lying position D to a predetermined angle. Further, the door body 1 is held at the standing position U1 against the wave force in the pushing wave direction a by the first holding member 6. As a result, the push wave is suppressed by the door body 1 at the standing position U1.

  On the other hand, when the push wave ends and a pulling wave is generated, the door body 1 falls to the lying position D on the bottom surface 2 as shown in FIGS. Then, the wave force in the pulling direction b flows into the gap (elevation angle) f between the other end 1b of the door body 1 and the water bottom surface 2 so that the other end 1b of the door body 1 faces upward, A downward couple is generated in the portion 1a.

  At this time, since the lower surface 1d of the door body 1 is substantially arcuate, the fulcrum and the center of gravity of the door body 1 gradually move in the direction of the one end 1a from the fall position D of the two-dot chain line, so that the lower surface 1d It naturally rises up to a predetermined standing angle (for example, about 30 degrees) while rolling on the bottom surface 2. When the fulcrum and the center of gravity move to the one end 1a, the one end 1a is connected to the second fixing belt 5, so that the door body 1 rotates around the one end 1a (see arrow R). ). That is, the door body 1 rotates to the standing position (for example, about 90 degrees) U2 after rolling from the lying position D to a predetermined angle. Further, the door body 1 is held at the standing position U2 against the wave force in the pulling direction b by the second holding member 7. As a result, the pulling wave is suppressed by the door body 1 at the standing position U2.

  If such a undulating wave breaker is installed at an entrance (water channel) (see reference numeral 31 in FIG. 4) partitioned by a fixed breakwater (see reference numeral 30 in FIG. 4), As a result, it is possible to suppress the rapid rise of the tide level and to suppress the sudden drop of the tide level in the harbor due to a tsunami or other pulling wave.

JP 2003-239243 A JP 2006-342653 A JP 2010-265618 A

  Here, in the undulation type wave breaker disclosed in Patent Document 3, it is desired to stand up quickly even when the flow velocity is low, that is, to improve the standing sensitivity to pushing waves and pulling waves such as tsunamis, and to further reduce damage caused by tsunamis and the like. There was a request.

  The present invention has been made to meet the above-mentioned demand, and provides a undulation type wave breaker capable of further improving the standing sensitivity to a push wave or a pulling wave such as a tsunami and further reducing damage caused by the tsunami or the like. It is intended to do.

In order to solve the above-mentioned problems, the present invention is swingable between a lying position that falls in a substantially parallel state with respect to the bottom member and a standing position that rises in a substantially vertical state with respect to the bottom member. In the lying down position, one end that receives the wave force in the pushing wave direction and the other end that receives the wave force in the pulling wave direction are respectively set above the water bottom laying member. One end is connected to the water bottom laying member in the pushing wave direction, and the other end is connected to the door body formed in a substantially arc shape or a substantially trapezoidal shape downward in a side view between the lower surface contacting the laying member. One end is connected to the vicinity of the other end portion of the door body, and one end is connected to the first bottom belt for swingably supporting the other end portion of the door body; The end is connected to the vicinity of one end of the door body, and the one end of the door body is A second fixing belt that is movably supported; a first holding member that holds the door body in an upright position against wave force in a pushing wave direction; and the door body that resists wave force in a pulling wave direction. In the undulation type wave breaker provided with the second holding member that holds in the upright position, one end of the first holding member is connected to the water bottom laying member in the push wave direction, and the other end is the door. A first retaining belt connected near one end of the body to hold the door body in an upright position against the wave force in the pushing wave direction, and the second holding member is the water bottom in the wave drawing direction A second retaining belt having one end connected to the flooring member and the other end connected to the vicinity of one end of the door body to hold the door body in an upright position against wave force in a pulling direction. , at least press-wave side of the upper surface opposite the lower surface of the door body in the sea bed for laying member, side In is formed in an upward substantially arc-shaped or substantially trapezoidal, to at least one of the lower surface of the upper surface and the door body of the sea bed for laying member, the portion where the belt is located, Mari included recess capable this belt fitted Is formed .

  According to a second aspect of the present invention, the upper surface of the water bottom laying member has a configuration in which both the pushing wave direction side and the drawing wave direction side are formed in a substantially arc shape or a substantially trapezoidal shape upward in a side view. it can.

  According to a third aspect of the present invention, the bottom surface of the water bottom laying member is formed in a substantially arcuate or substantially trapezoidal shape with the pushing wave direction side upward in a side view, and the drawing wave side is a substantially horizontal or upwardly inclined flat surface. It can be set as the formed structure.

  According to a fourth aspect of the present invention, the lower surface between the one end and the other end of the door body is formed in a substantially arc shape or a trapezoid shape downward in a side view, and the upper surface is formed in a flat shape. It can be configured.

According to a fifth aspect of the present invention, the upper surface of the water bottom laying member is formed in a rail shape in which a part of the lower surface of the door body can be contacted in the swinging direction of the door body. it can.

As in claim 6 , a plurality of the door bodies are arranged side by side, and a guide plate for restricting the lateral movement of the door bodies is provided between the adjacent door bodies. it can.

According to a seventh aspect of the present invention, the door body may be formed in a hollow shape, and the hollow portion may be filled with a liquid.

  According to the present invention, since the door body (gate) normally falls to the fall position of the water bottom laying member (for example, about 0 degrees with respect to the water bottom laying member, the same applies hereinafter), it affects the navigation of the ship. Not give.

  When a push wave is generated due to a tsunami, storm surge, secondary vibration, etc., wave force in the push wave direction flows into the gap (elevation angle) between one end of the door body and the bottom laying member. An upward force is generated at one end and a downward force is generated at the other end.

  At this time, if the lower surface of the door body is substantially arc-shaped, the fulcrum and the center of gravity gradually move toward the other end portion of the door body, so that the lower surface rolls the water bottom laying member and a predetermined standing angle. It gets up naturally (for example, about 30 degrees). And if a fulcrum and a gravity center move to the other end part, since this other end part is connected with the 1st fixed belt, a door will come to rotate centering on the other end part. That is, the door body rolls to a standing position (for example, about 90 degrees) after rolling from a lying position to a predetermined angle. Further, the door body is held at the standing position against the wave force in the pushing wave direction by the first holding member. As a result, the push wave is suppressed by the door body in the standing position.

  On the other hand, when the push wave ends and a pulling wave is generated, the door body falls to the lying position of the water bottom laying member. Then, the wave force in the pulling direction flows into the gap (elevation angle) between the other end portion of the door body and the water bottom laying member, so that the other end portion of the door body is directed upward and the one end portion is directed downward. Couples are generated.

  At this time, if the lower surface of the door body is substantially arc-shaped, the fulcrum and the center of gravity of the door body gradually move toward one end, so that the lower surface rolls the water bottom laying member and a predetermined standing angle ( It gets up naturally up to about 30 degrees). And if a fulcrum and a gravity center move to one end part, since this one end part is connected with the 2nd fixed belt, a door will come to rotate centering on one end part. That is, the door body rolls to a standing position (for example, about 90 degrees) after rolling from a lying position to a predetermined angle. Further, the door body is held in the standing position against the wave force in the pulling direction by the second holding member. As a result, the pulling wave is suppressed by the door body in the standing position.

  Here, if the water bottom laying member is a substantially horizontal flat surface such as the water bottom surface of Patent Document 3, wave force flows between one end (or the other end) of the door body and the water bottom laying member. In order to ensure a clearance (elevation angle) for this purpose, it is necessary to set the height from the water bottom laying member to one end (or the other end) of the door body high. Thereby, when the thickness of the door is increased, the underwater weight of the door is increased. As a result, when the flow velocity of the push wave (or the pulling wave) is low, the rising speed is slowed and the standing sensitivity is deteriorated.

  On the other hand, since at least the push wave direction side of the upper surface facing the lower surface of the door body in the water bottom laying member is formed in a substantially arc shape or a substantially trapezoidal shape upward in a side view, one end portion of the door body [ Or the other end (when the both sides of the pushing wave direction and the wave drawing direction side of the upper surface of the water bottom laying member are formed in a substantially arc shape or a substantially trapezoidal shape upward in a side view. In addition to the gap (elevation angle) between the horizontal plane (corresponding to the bottom surface 2 of Patent Document 3 and the same below), and between the horizontal plane and the top surface of the bottom-floor laying member. Since the clearance (elevation angle) is ensured, it is not necessary to set the height from the horizontal plane to one end (or the other end) of the door body high. As a result, the weight of the door body can be reduced by reducing the thickness of the door body.As a result, the standing speed is increased even when the flow velocity of the push wave (or the pulling wave) is slow, and the standing sensitivity is further improved. Damage caused by tsunami can be reduced.

  If the undulating wave breaker is installed at the entrance (waterway) partitioned by the harbor breakwater as described above, the tide level in the harbor can be prevented from rising suddenly by the push wave, and the tide level in the harbor can be reduced by the pulling wave. It is possible to suppress a sudden drop with high sensitivity. Moreover, if it is installed at the river mouth, it is possible to suppress with high sensitivity that the push wave goes back up the river and overflows from the upstream bank. In addition, when installed at the river mouth, there is no particular need for countermeasures against pulling waves. In such a case, the door can be held at an appropriate position in the lying position direction by the second holding member. .

  Thus, the door body supports the other end portion of the door body in a swingable manner with the first fixing belt, and supports the one end portion of the door body in a swingable manner with the second fixing belt. Since there is no need for multiple hinge fittings and hinge shafts as in the background art (hingeless type), the support structure is simple and the number of parts is reduced (hingeless gate).

  The first fixed belt has one end connected to the water bottom laying member in the push wave direction and the other end connected to the vicinity of the other end of the door body. The second fixed belt has one end connected to the water bottom laying member in the wave direction and the other end connected to the vicinity of one end of the door. Therefore, the position of the door body is restricted by the first fixing belt and the second fixing belt so that the door body does not move in either the pushing wave direction or the pulling wave direction at the lying down position.

  Further, in the case of the hinge type as disclosed in Patent Documents 1 and 2, the resistance moment due to the dead weight of the door body is maximum at the start of standing from the lying down position, and the resistance moment gradually decreases with standing. Therefore, when starting to stand from the lying down position, a mechanism for raising the door to a certain angle by using aerodynamic force or the like is required. On the other hand, in the hingeless type of the present invention, at the start of standing from the lying position for both the push wave and the pulling wave, the above-described couple forces up to a predetermined standing angle (for example, about 30 degrees). It gets up naturally, and then gets up to the standing position by wave force. Therefore, at the start of standing from the lying position, the resistance moment due to the weight of the door body is zero (0), and the resistance moment gradually increases with standing, so that aerodynamic force and the like are raised compared to the hinge type. No mechanism is required, and it can stand up easily only with wave power. Also, when wave power disappears, it will slowly fall down.

As described above, the door body automatically stands up with no power with respect to the push wave / pulling wave, and thus is not affected by the lifeline (power failure or the like). In addition, since there is a degree of freedom in the contact between the water bottom foundation ground (water bottom laying member) and the door body, it is not easily affected by ground deformation due to the earthquake. In particular, even if a foreign object such as driftwood is sandwiched between the water bottom laying member, the door body comes to stand while riding on the foreign object. In addition, installation is easy, installation work period is short, and there is little influence on ship navigation.
Further, since each holding member is a retaining belt, the same belt material as that of each fixed belt can be shared, which facilitates manufacture and management. If there is no particular need for countermeasures against pulling waves, the door body can be held near the fall position by shortening the second retaining belt in advance.
In addition, when the door body is in the lying position, as well as when a push wave or pulling wave that rises from the lying position to the standing position, the belt fits into the recess, so that the belt is attached to the lower surface of the door body. It is not sandwiched between the upper surface of the water bottom laying member. Therefore, the underwater weight of the door (depending on the size of the door, several tons to several tens of tons) does not act on the belt, so that the belt can be prevented from being damaged.

  According to claim 2, if the upper surface of the water bottom laying member is formed in a substantially arc shape or a substantially trapezoidal shape in which both the pushing wave direction side and the pulling wave direction side are upward in a side view, the lower surface of the door body and the water bottom The gap (elevation angle) between the top surface of the laying member can be made the same during pushing and pulling. Therefore, the standing sensitivity of both the pushing wave and the pulling wave is further improved.

  According to claim 3, when the upper surface of the water bottom laying member is formed in a substantially arcuate or substantially trapezoidal shape in which the pushing wave direction side is upward in a side view, and the pulling wave direction side is formed in a flat surface that is substantially horizontal or inclined upward. The gap (elevation angle) between the lower surface of the door body and the upper surface of the waterbed laying member can narrow the pulling time with respect to the pushing wave, thereby reducing the standing sensitivity. Therefore, seawater that enters the harbor, etc., rises at the time of a pulling wave and passes above the door body that has reduced sensitivity, and is quickly discharged out of the harbor (excludes internal water), so the water level in the harbor is lowered quickly. It becomes possible.

  According to claim 4, if only the lower surface of the door body is formed in a substantially arcuate or trapezoidal shape downward and the upper surface is formed in a flat shape (substantially crescent shape), one end (or the other end) of the door body from the horizontal plane Part) can be set lower, and as a result, the thickness of the door body can be made thinner, resulting in a lighter weight of the door body underwater, resulting in a slower flow rate of the push wave (or pulling wave). However, the rising speed is increased and the standing sensitivity is further improved.

According to claim 5 , since the upper surface of the water bottom laying member is formed in a rail shape in which a part of the lower surface of the door body can be contacted, a substantially arc-shaped or substantially trapezoidal portion may be a part. The manufacturing cost of the upper surface is greatly reduced (about 1/3 to 1/4) compared to the case where all are provided. In addition, since the amount of shellfish attached to the upper surface (which may be an obstacle to the swinging of the door) is reduced, the application cost of the adhesion preventing material is also reduced.

According to the sixth aspect , the lateral movement of the side-by-side doors can be reliably restricted by the guide plate.

According to claim 7 , since the door body is hollow, it is lightweight at the time of manufacture and transportation, and is easy to handle, and liquid (such as sea water or river water at the site) can be used at the installation site. When the hollow portion is filled, it can be installed on the bottom of the water bottom laying member on the spot, so that the installation work becomes easy.

BRIEF DESCRIPTION OF THE DRAWINGS It is the undulation type | formula wave breaker of embodiment of this invention, (a) is a top view at normal time, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is the undulation type | formula wave breaker of embodiment of this invention, (a) is a top view at the time of pushing wave, (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS It is the undulation type | formula wave breaker of embodiment of this invention, (a) is a top view at the time of a drawing wave, (b) is a side view. FIG. 2 is a perspective view of the undulating wave breaker corresponding to FIG. It is a perspective view at the time of pushing wave of the undulation type wave breaker corresponding to FIG. FIG. 4 is a perspective view of the undulating wave breaker corresponding to FIG. It is a disassembled perspective view of a door body and a floor-laying member. (A) (b) is the side view which each showed the clearance gap (elevation angle) of the door body of this embodiment, and the door body of patent document 3. FIG. (A) and (b) are the side views which showed the rocking | fluctuation limit standing angle of the door body of this embodiment, and the door body of patent document 3, respectively. (A)-(c) The side view of the modification of a door body, (d) (e) is a side view of the modification of the floor member for water bottoms. (A) is a plan view of a water bottom laying member having an H-girder type recess, (b) is an enlarged sectional view taken along line II of (a), and (c) is an II line of (a) of a modification. It is an expanded sectional view. (A) is a plan view of a water bottom laying member having a box girder type recess, (b) is an enlarged sectional view taken along line II of (a), and (c) is an II line of (a) of a modification. An enlarged sectional view, (d) is an enlarged sectional view taken along the line II of (a) of a water bottom laying member having a box girder type concave portion of a modified example, and (e) is a modified example of (a) of (a). It is an II line expanded sectional view. (A) is a plan view of a floor girder type water bottom laying member without a recess, (b) is an enlarged cross-sectional view taken along line II of (a), and (c) is an II line of (a) of the modification. It is an expanded sectional view. (A) is a side view of a water bottom laying member whose upper surface is generally arcuate upward, (b) is a side view of a waterbed laying member whose upper surface is upwardly upward, and (c) is a water bottom laying member fixed to the water bottom. The side view of the point to do, (d) is a side view of the door body with a recessed part, (e) is principal part front sectional drawing of (d). (A) is a side view of a water bottom laying member having a substantially horizontal flat surface on the top surface in the wave direction, and (b) is a side surface of the water bottom laying member in which the top surface on the wave direction side is an upwardly inclined flat surface. FIG. It is the undulation type wave breaker of patent document 3, (a) is a top view in normal times, (b) is a side view. It is the undulation type wave breaker of patent document 3, (a) is a top view at the time of a pushing wave, (b) is a side view. It is the undulation type wave breaker of patent document 3, (a) is a top view at the time of a wave drawing, (b) is a side view.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In addition, the location of the same structure and effect | action as FIG. 16-18 of patent document 3 attaches | subjects the same number, and abbreviate | omits detailed description.

  1 to 3 and FIGS. 4 to 6 are undulating wave breakers (or rocking breakwaters) according to the present invention. FIG. 1A is a plan view in a normal state (when there is no pushing wave or pulling wave), FIG. 1B is a side view, and FIG. 4 is a perspective view in a normal state corresponding to FIG. 2A is a plan view at the time of pushing waves, FIG. 2B is a side view, and FIG. 5 is a perspective view at the time of pushing waves corresponding to FIG. 2B. FIG. 3A is a plan view at the time of drawing, FIG. 6B is a side view, and FIG. 6 is a perspective view at the time of drawing corresponding to FIG.

  As shown in FIGS. 1 and 4, the door body (gate) 11 is an upper part of the bottom water laying member 12 laid on the water bottom 33 such as an entrance (water channel) 31 or a river estuary partitioned by the fixed breakwater 30 of the harbor. Is installed.

  Referring to FIG. 7, the door body 11 has a substantially rectangular shape extending in the width direction such as the entrance 31 in a plan view. When the width of the entrance / exit 31 is wide, as shown in FIGS. 4 to 6, a plurality of units (three in this example) are arranged side by side so as to cover the width. In practice, for example, one door W has a width W of 60 m, a height T of 20 m, and a substantially arcuate maximum thickness J1 described later of 1.2 m.

  The door body 11 is a lying position D (see FIG. 1B) that falls in a substantially parallel state with respect to the water bottom laying member 12, and standing positions U1, U2 that rise in a substantially vertical state with respect to the water bottom laying member 12. 2 (b) and 3 (b)].

  The door body 11 has an end portion 11a that receives a wave force in the pushing wave direction a and an other end portion 11b that receives a wave force in the pulling wave direction b from the water bottom laying member 12 in the normal lying position D, respectively. Is also set upward. A space between at least the end portions 11a and 11b and the lower surface 11d in contact with the water bottom laying member 12 is formed in a substantially arc shape in a side view. Specifically, the lower surface 11d between the one end portion 11a and the other end portion 11b is formed in a substantially arc shape downward in a side view, and the upper surface 11c is formed in a flat shape (substantially crescent shape).

  The door body 11 is formed into a hollow shape by combining upper and lower surfaces 11c, 11d and both side surfaces 11e, 11f such as stainless steel plates and welded, and an appropriate amount of liquid is filled in the hollow portion. Thereby, since buoyancy does not arise in the door body 11, it becomes possible to install in the fall position D on the upper part of the floor member 12 for water bottoms. It is also possible to fill a solid (iron lump etc.) instead of the liquid.

  Referring to FIG. 7, the water bottom laying member 12 is a unitized state by welding a combination of a top surface 12a such as a stainless steel plate and a steel material or the like that supports the column or beam to support the water bottom. 33. Specifically, as shown in FIG. 4, the water bottom covering member 12 is installed at the bottom of the concave portion 33 a formed in the water bottom 33, and the door body 11 installed on the top of the water bottom covering member 12 is in the lying position D. The upper surface 11c of the door body 11 is set so as not to protrude greatly above the water bottom 33 so that navigation of the ship 34 and the like is not hindered.

  The upper surface 12a facing the lower surface 11d of the door body 11 in the water bottom laying member 12 is formed in a substantially arc shape upward in a side view.

  That is, with respect to the horizontal plane K shown in FIG. 1B, the lower surface 11d of the door body 11 and the upper surface 12a of the water bottom laying member 12 are formed in a substantially arcuate shape that is substantially line symmetric and downward and upward. It will be.

  Thereby, between the lower surface 11d of each edge part 11a, 11b of the door body 11, and the upper surface 12a of the bottom member 12 for water bottoms, between the one end part (or other end part 11b) 11a and the horizontal surface K of the door body 11 is provided. In addition to the gap (elevation angle) f for the wave force to flow in, the gap (elevation angle) f for the wave force to flow naturally also exists between the horizontal plane K and the upper surface 12a of the bottom laying member 12. Will be formed.

  The door body 11 is provided with a plurality of flexible first fixing belts 4 (two in this example at a predetermined interval in the width direction). One end 4 a of the first fixed belt 4 is connected to the water bottom laying member 12 in the pushing wave direction a, extends along the lower surface 11 d of the door body 11, and the other end 4 b is the other end of the door body 11. It is connected to the part 11b.

  The first fixing belt 4 supports the other end portion 11b of the door body 11 so as to be swingable. The first fixed belt 4 rotates Q (see FIG. 2B) after the door body 11 rolls in the right direction from the lying position D, and uses the other end 11b in contact with the water bottom laying member 12 as a fulcrum. The length is such that it rises to the standing position U1 in the push wave direction a.

  A flexible first retaining belt (first holding member) 6 is provided at the same position as each first fixing belt 4 (it can be shifted in the width direction as shown in FIGS. 4 to 6). It has been. One end 6 a of the first retaining belt 6 is connected to the water bottom laying member 12 in the push wave direction a, extends in a loop shape in the direction opposite to the push wave direction a, and the other end 6 b is connected to the door body 11. It is connected to one end 11a.

  When the first retaining belt 6 rolls clockwise Q after the door body 11 rolls in the right direction from the lying position D, the first retaining belt 6 rises to the standing position U1 in the pushing wave direction a by the first fixing belt 4. 11 is set to such a length as to hold the standing position U1 against the wave force in the pushing wave direction a.

  Although one end 4a of the first fixing belt 4 and one end 6a of the first retaining belt 6 are connected to the water bottom laying member 12, they can be connected to an anchor block installed on the water bottom 33. The same applies to one end 5a of the second fixing belt 5 and one end 7a of the second retaining belt 7 described below.

  A plurality of flexible second fixing belts 5 (in this example, two at a predetermined interval in the width direction) are provided to the door body 11 so as not to overlap the first fixing belt 4. The second fixing belt 5 is provided with one end 5a connected to the bottom member 12 for the water bottom in the wave pulling direction b, extending along the lower surface 11d of the door body 11, and the other end 5b being the door body 11. Is connected to one end 11a.

  The 2nd fixed belt 5 comes to support the one end part 11a of the door body 11 so that rocking | fluctuation is possible. The second fixing belt 5 rotates left (see FIG. 3B) after the door body 11 rolls leftward from the lying position D (see FIG. 3B), and has one end 11a in contact with the water bottom laying member 12 as a fulcrum. The length is such that it rises to the standing position U2 in the pulling wave direction b.

  A flexible second retaining belt (second holding member) 7 is provided at the same position as each second fixing belt 5 (it can be shifted in the width direction as shown in FIGS. 4 to 6). It has been. One end 7 a of the second retaining belt 7 is connected to the water bottom laying member 12 in the wave pulling direction b, extends in a loop shape in the opposite direction to the wave pulling direction b, and the other end 7 b is connected to the door body 11. It is connected to the other end 11b.

  The second retaining belt 7 rotates left [see FIG. 3 (b)] after the door body 11 rolls leftward from the lying position D (see FIG. 3B), and the standing position in the pulling wave direction b by the second fixing belt 5. The length of the door 11 is such that the door 11 is held in the standing position U2 against the wave force in the pulling direction b when it gets up at U2.

  Each of the belts 4 to 7 is preferably made of, for example, reinforced rubber, but may be made of a flexible metal.

  Instead of the first and second retaining belts 6 and 7, the door body 11 is held at the standing position U <b> 1 against the wave force in the pushing wave direction a, and the door body 11 is resisted against the wave force in the pulling direction b. Thus, a stopper member (first and second holding members) can be provided on the door body 11 so as to be held at the standing position U2.

  Here, the relationship between the gap (elevation angle) f between the door body 11 and the water bottom laying member 12 of the present embodiment and the gap (elevation angle) f between the door body 1 and the water bottom surface 2 of Patent Document 3 will be described.

  FIG. 8A is a side view showing a gap (elevation angle) f between the door body 11 and the water bottom laying member 12, and FIG. 9A is a side view showing the swing limit standing angle α of the door body 11. FIG.

  FIG. 8B is a side view showing the gap (elevation angle) f between the door body 1 and the water bottom surface 2, and FIG. 9B is a side view showing the swing limit rising angle α of the door body 1. is there.

  As shown in FIGS. 8A and 8B, the height T of the door body 11 and the door body 1 are both 20 m, the maximum thickness J1 of the door body 11 is 1.2 m, and the maximum thickness of the door body 1. J3 is 2.4 m.

  The maximum thickness J2 of the upper surface 12a of the water bottom laying member 12 is 1.2 m, and the upper surface of the water bottom surface 2 is a substantially horizontal flat surface.

  That is, in Patent Document 3 in which the upper surface of the water bottom surface 2 is a substantially horizontal flat surface, the maximum thickness J3 of the door body 1 is required to be 2.4 m in order to ensure a gap (elevation angle) f.

  On the other hand, in the present embodiment in which the upper surface 12a of the water bottom laying member 12 is substantially arc-shaped and the maximum thickness J2 is 1.2 m, in order to ensure the same gap (elevation angle) f as in Patent Document 3, The maximum thickness J1 of the door body 11 can be 1.2 m (half of Patent Document 3).

  Thus, the door of patent document 3 which combined the door body 11 of this embodiment which combined the bottom member 12 for the water bottom which has the substantially circular arc-shaped upper surface 12a, and the water bottom 2 which has the upper surface which is a substantially horizontal flat surface. The gap (elevation angle) f is substantially the same as that of the body 1.

  Then, next, the relationship of the rocking | fluctuation limit standing angle (alpha) of the door body 11 of this embodiment and the door body 1 of patent document 3 is demonstrated. Here, the swing limit standing angle α is a predetermined standing angle (for example, about 30 degrees) while the lower surface 11d rolls on the substantially arc-shaped upper surface 12a of the water bottom laying member 12 in the door body 11 of the present embodiment. In the door body 1 of Patent Document 3, the lower surface 1d rolls on the upper surface, which is a substantially horizontal flat surface of the water bottom surface 2, and a predetermined standing angle (for example, about 30 degrees). It is the angle that naturally rises up to.

  As shown in FIG. 9A, at the lying position D of the door body 11, the fulcrum H and the center of gravity G are at an intermediate position of the height H (position of the maximum thickness J1). Moreover, the inclination of the door body 11 is, for example, about 0 degree with respect to the water bottom laying member 12. FIG. 9B shows the door body 1 and is the same as the door body 11 of FIG.

  Then, the wave force in the pushing wave direction a (the same applies to the wave force in the pulling wave direction b) flows into the gap (elevation angle) f between the one end portion 11a of the door body 11 and the upper surface 12a of the water bottom laying member 12. Thus, a couple P is generated upward at one end 11a of the door body 11 and downward at the other end 11b.

  At this time, when the door body 11 is in the lying position D, the fulcrum H and the center of gravity G are at a position of 0 °. However, if the door 11 is tilted by, for example, 5 °, the fulcrum H and the center of gravity G are at a position of 5 °. Moving. Similarly, when tilted by 10 °, 15 °, 20 °, 25 °, and 30 °, the fulcrum H and the center of gravity G move to positions of 10 °, 15 °, 20 °, 25 °, and 30 °, respectively.

  As a result, the fulcrum H and the center of gravity G gradually move in the direction of the other end 11b, so that the lower surface 11d rolls on the upper surface 12a of the waterbed laying member 12 and the door body 11 has a predetermined standing angle (for example, It rises naturally up to about 30 degrees… the swing limit standing angle α).

  And if the fulcrum H and the gravity center G move to the other end part 11b, since this other end part 11b is connected with the 1st fixing belt 4, the door body 11 centers on the other end part 11b (as fulcrum H). It will rotate.

  When the door body 11 of the present embodiment in FIG. 9A is compared with the door body 1 of Patent Document 3 in FIG. 9B, the gap (elevation angle) f is substantially the same, and as a result, the swing limit standing angle is increased. It can be seen that α is almost the same.

  From this, the maximum thickness J1 of the door body 11 of the present embodiment can be reduced by about half compared to the maximum thickness J3 of the door body 1 of Patent Document 3 in FIG. 11 underwater weight can be reduced.

  In the case of the undulating wave breaker configured as described above, the door body 11 is in the normal position, as shown in FIG. 1 or FIG. Since it falls to about 0 degrees (the same applies hereinafter), it does not affect the navigation of the ship 34 or the like. In this normal wave flow, the door body 11 is slightly swung.

  As shown in FIG. 2 or 5, when a push wave is generated by a tsunami, a storm surge, a secondary vibration, etc., the wave force in the push wave direction a is between the one end portion 11 a of the door body 11 and the water bottom laying member 12. Flows into the gap (elevation angle) f, and a couple P is generated at the one end 11a of the door body 11 upward and at the other end 11b.

  At this time, since the lower surface 11d of the door body 11 and the upper surface 12a of the water bottom laying member 12 are substantially arc-shaped, the fulcrum H and the center of gravity G of the door body 11 gradually move toward the other end portion 11b. Thus, the lower surface 11d naturally rises up to a predetermined standing angle (for example, about 30 degrees) while rolling on the upper surface 12a of the water bottom laying member 12. When the fulcrum H and the center of gravity G move to the other end portion 11b, the other end portion 11b is connected to the first fixing belt 4, so that the door body 11 rotates around the other end portion 11b. Become. That is, the door 11 rotates from the lying position D to a predetermined angle and then rotates to the standing position (for example, about 90 degrees) U1.

  On the other hand, as shown in FIG. 3 or FIG. 5, when the pushing wave ends and then the pulling wave is generated, the door body 11 falls to the fall position D on the upper surface 12 a of the water bottom laying member 12. The wave force in the pulling direction b flows upward into the other end portion 11b of the door body 11 by flowing into the gap f between the other end portion 11b of the door body 11 and the upper surface 12a of the water bottom laying member 12. The downward couple P is generated at the one end portion 11a.

  At this time, since the lower surface 11d of the door body 11 and the upper surface 12a of the water bottom laying member 12 are substantially arc-shaped, the door body 11 is such that the fulcrum H and the center of gravity G gradually move toward the one end 11a. The lower surface 11d naturally rises up to a predetermined standing angle (for example, about 30 degrees) while rolling on the upper surface 12a of the water bottom laying member 12. And if the fulcrum H and the gravity center G move to the one end part 11a, this one end part 11a is connected with the 2nd fixing belt 5, Therefore The door body 11 comes to rotate centering on the one end part 11a. That is, the door body 11 rotates to the standing position (for example, about 90 degrees) U2 after rolling from the lying position D to a predetermined angle.

  Therefore, as shown in FIG. 2, when a push wave is generated, the other end portion 11 b of the door body 11 is connected to the first fixing belt 4, so that the door body 11 rolls in the right direction. Right-turn Q around the other end 11b. And since the one end part 11a of the door body 11 is connected with the 1st retention belt 6, the door body 11 comes to be hold | maintained in the standing position U1 against the wave force of the pushing wave direction a. As a result, the push wave is suppressed by the door body 11 at the standing position U1.

  Also, as shown in FIG. 3, when the push wave is finished and then the pulling wave is generated, the one end portion 11a of the door body 11 is connected to the second fixing belt 5, so that the door body 11 is directed leftward. Rotate counterclockwise around the one end 11a. Since the other end portion 11b of the door body 11 is connected to the second retaining belt 7, the door body 11 is held at the standing position U2 against the wave force in the wave pulling direction b. As a result, the pulling wave is suppressed by the door body 11 at the standing position U2.

  Here, if the water bottom laying member 12 is a substantially horizontal flat surface K like the water bottom 2 of Patent Document 3, one end (or the other end 11b) 11a of the door 11 and the water bottom laying member 12 In order to secure a gap (elevation angle) f for wave force to flow in between, it is necessary to set the height from the bottom member 12 to the one end (or the other end 11b) 11a of the door body 11 high. There is. Thereby, when the thickness of the door body 11 is increased, the underwater weight of the door body 11 is increased. As a result, when the flow velocity of the push wave (or the pulling wave) is slow, the standing speed is slowed and the standing sensitivity is deteriorated. .

  On the other hand, since the upper surface 12a facing the lower surface 11d of the door body 11 in the water bottom laying member 12 is formed in a substantially arc shape (or substantially trapezoidal shape) upward in a side view, one end portion of the door body 11 is formed. (Or the other end portion 11b) In addition to the gap (elevation angle) f between the horizontal surface K and the horizontal surface K, a gap (elevation angle) f is also secured between the horizontal surface K and the upper surface 12a of the water bottom laying member 12. Therefore, it is not necessary to set the height from the horizontal plane K to one end (or the other end 11b) 11a of the door body 11 high. Thereby, the thickness of the door body 11 can be reduced, so that the weight of the door body 11 in water is reduced. As a result, even when the flow velocity of the push wave (or the pulling wave) is slow, the rising speed is increased and the standing sensitivity is further improved. Therefore, damage caused by tsunamis can be reduced.

  In this way, if the undulating wave breaker is installed at the entrance / exit (water channel) 31 partitioned by the fixed breakwater 30 of the port, it is possible to suppress a sudden rise in the tide level in the port due to the push wave, and in the port due to the pulling wave It will be possible to suppress the sudden drop in the tide level.

  Moreover, if it is installed at the river mouth, it is possible to prevent the push waves from going back up the river and overflowing from the upstream bank. Note that when installed at the river mouth, there is no particular need for countermeasures against pulling waves. In this case, if the second retaining belt 7 is shortened in advance, the door body 11 is moved to an appropriate position in the lying position D. Can be held in place.

  If comprised as mentioned above, the door body 11 will support the other end part 11b of the door body 11 by the 1st fixed belt 4 so that rocking | fluctuation is possible, and the one end part 11a of the door body 11 with the 2nd fixed belt 5 will be described. Since it is supported so that it can swing, there is no need for multiple hinge brackets and hinge shafts as in the background art (hingeless type), so the support structure is simple and the number of parts is reduced (hingeless gate). .

  Further, the first fixed belt 4 has one end 4 a connected to the water bottom laying member 12 in the push wave direction a, and the other end 4 b connected to the vicinity of the other end 11 b of the door body 11. The second fixed belt 5 has one end 5 a connected to the water bottom laying member 12 in the pulling direction b and the other end 5 b connected to the vicinity of the one end 11 a of the door body 11. Therefore, the position of the door 11 is restricted so that the door 11 does not move in either the pushing wave direction a or the pulling wave direction b at the lying position D between the first fixing belt 4 and the second fixing belt 5. Is done.

  Further, since each of the retaining belts 6 and 7 can share the same belt material as that of each of the fixed belts 4 and 5, manufacture and management are facilitated.

  Furthermore, since only the lower surface 11d of the door body 11 is formed in a substantially arcuate or substantially trapezoidal shape downward and the upper surface 11c is formed in a flat shape (substantially crescent shape), one end of the door body 11 from the horizontal plane K (or The height to the other end portion 11b) 11a can be set lower, and as a result, the thickness of the door body 11 can be made thinner, so that the underwater weight of the door body 11 becomes lighter. Even if the wave velocity is low, the rising speed is increased, and the rising sensitivity is further improved.

  Further, since the door body 11 is hollow, it is lightweight during manufacture and transportation, and is easy to handle, and at the installation site, liquid (such as sea water or river water) is supplied to the hollow portion 13. When filled, it can be installed on the bottom of the water bottom laying member 12 on the spot, so that the installation work becomes easy.

  In this way, the door body 11 automatically stands up with no power with respect to the push wave / pulling wave, and thus is not affected by the lifeline (power failure or the like). Moreover, since there is a degree of freedom in the contact between the water bottom foundation ground (water bottom laying member 12) and the door body 11, it is difficult to be affected by ground fluctuation caused by an earthquake. In particular, even if a foreign object such as driftwood is sandwiched between the water bottom laying member 12, the door body 11 comes to stand while riding on the foreign object. In addition, installation is easy, installation work period is short, and there is little influence on ship navigation.

  In the above embodiment, the lower surface 11d of the door body 11 is formed in a substantially arcuate shape downward in a side view and the upper surface 11c is formed in a flat shape (substantially crescent shape). However, as shown in FIG. Both the upper and lower surfaces 11c and 11d of the electrode 11 can be formed in a substantially arc shape.

  10C and 10D, the lower surface 11d of the door body 11 or both the lower surface 11c and the upper surface 11c of the door body 11 can be formed in a substantially trapezoidal shape in a side view.

  In the above-described embodiment, the upper surface 12a of the water bottom laying member 12 is formed in a substantially arc shape upward in a side view. However, as shown in FIGS. It can also be formed in a substantially trapezoidal (tilted) shape as viewed.

  In the embodiment, the upper surface 12a of the water bottom laying member 12 is formed so that both the pushing wave direction a side and the drawing wave direction b side are substantially arcuate or trapezoidal upward in a side view. In this way, the gap (elevation angle) f between the lower surface 11d of the door body 11 and the upper surface 12a of the water bottom laying member 12 can be made the same at the time of the pushing wave and at the time of the pulling wave. Both standing-up sensitivities are improved.

  On the other hand, as shown in FIG. 15 (a), the upper surface 12a of the water bottom laying member 12 is formed in a substantially arc shape or a substantially trapezoidal shape in the pushing wave direction a side upward in a side view, and the drawing wave direction b side is Alternatively, it can be formed on a substantially horizontal flat surface 12f ′. As a result, the gap (elevation angle) f ′ on the side of the pulling wave direction b becomes about half as narrow as the gap (elevation angle) f on the side of the push wave a.

  In this way, at the time of the push wave, the rising sensitivity up to a predetermined rising angle (swing limit rising angle α) is the same as that in the above embodiment, but the subsequent rising speed is somewhat slow. On the other hand, since the gap (elevation angle) f is narrow at the time of the pulling wave, the rising sensitivity up to a predetermined standing angle (swing limit rising angle α) is reduced to about half that of the above embodiment, but the rising speed thereafter. Are the same.

  Therefore, the seawater that entered the harbor by overflowing the upper part of the door body 11 standing at the time of the push wave passes through the upper part of the door body 11 whose sensitivity has been lowered and is quickly discharged out of the harbor at the time of the pulling wave. Because (internal water is excluded), the water level in the port can be lowered quickly.

  FIG. 12B shows a flat surface 12 f ″ inclined upward instead of the substantially horizontal flat surface 12 f ′ as shown in FIG.

  In this way, the gap (elevation angle) f ″ is further narrower than the gap (elevation angle) f ′ in FIG. 12A, so that a predetermined standing angle (oscillation limit standing angle α) at the time of the pulling wave is obtained. It is possible to make the rising sensitivity up to that in the embodiment of FIG.

  In the above embodiment, the entire upper surface 12a of the water bottom laying member 12 is formed in a substantially arcuate shape (or substantially trapezoidal shape) upward in a side view, but the H-digit type of FIGS. 11 (a) to 11 (c). As will be described later, the recesses 12b into which the belts 4 to 7 can be respectively fitted in the portions where the belts 4 to 7 are located on the upper surface 12a of the water bottom laying member 12 in the swinging direction of the door body 11. Can be formed. In addition, the box girder type (described later) in FIGS. 12A to 12E also has a similar recess 12b.

  Further, in place of the recess 12b on the upper surface 12a of the water bottom laying member 12, as shown in FIGS. 11 g can be formed in the swinging direction of the door body 11.

  It is also possible to form the recesses 12b and 11g on both the upper surface 12a of the water bottom laying member 12 and the lower surface 11d of the door body 11, respectively.

  In this way, the recesses 12b and 11g into which the belts 4 to 7 can be fitted are provided in the portions where at least one of the belts 4 to 7 of the upper surface 12a of the floor member 12 and the lower surface 11d of the door body 11 is located. If it is formed in the swinging direction of the door body 11, not only when the door body 11 is in the lying position D, but also when the door body 11 rises from the lying position D to the standing positions U1 and U2, and when a push wave / pulling wave arrives. Since the belts 4 to 7 are fitted into the recesses 12b and 11g, the belts 4 to 7 are not sandwiched between the lower surface 11d of the door body 11 and the upper surface 12a of the water bottom laying member 12. Therefore, since the underwater weight of the door body 11 (depending on the size of the door body 11, several tons to several tens tons) does not act on the belts 4 to 7, the belts 4 to 7 can be prevented from being damaged.

  11A to 11C, the upper surface 12a is in contact with a part of the lower surface 11d of the door body 11 in the swinging direction of the door body 11. As shown in FIG. It can be set as the structure currently formed in the shape of a possible rail.

  FIG. 11A is a plan view of an H-girder type water bottom laying member 12 having a recess 12b, FIG. 11B is an enlarged sectional view taken along the line II of FIG. 11A, and FIG. It is an II line expanded sectional view. FIG. 14A is a side view of the water bottom laying member 12 whose upper surface 12a is upward and substantially arc-shaped, and FIG. 14B is a side view of the water bottom laying member 12 whose upper surface 12a is upward and substantially trapezoidal.

  The water bottom laying member 12 includes a substantially rectangular base frame 12 </ b> A corresponding to the width W and height T of the door body 11. The base frame 12A is installed at the bottom of a recess 33a (see FIG. 4) formed in the water bottom 33. The height h1 of the base frame 12A is set to substantially the same height h1 as the lower end portion of the minimum height h1 of the upper surface 12a.

  On the base frame 12A, two pairs of H girders 12B with a recess 12b into which the belts 4 to 7 can be fitted are respectively welded and fixed at left and right positions in the width direction. And only the upper surface 12a of this H beam 12B is formed in the upward substantially circular arc shape (or upward substantially trapezoidal shape). That is, the rail-shaped upper surface 12a is formed on the upper part of the pair of H beams 12B.

  The base frame 12A is reinforced by welding the vertical reinforcing material 12c in the short side direction and the horizontal reinforcing material 12d in the long side direction and further fixing the diagonal reinforcing material 12e in the diagonal direction by welding. It has become.

  Here, the vertical reinforcing member 12c in the short side direction is set to a height h1 that is substantially the same as the height h1 of the base frame 12A. Further, the lateral reinforcing material 12d in the long side direction is set to a height h2 that is substantially the same as the top of the maximum height h2 of the upper surface 12a of the upper part of the H beam 12B.

  Then, by setting the height h2 of the lateral reinforcing material 12d in the long side direction to be high, the wave force in the pushing wave direction a and the wave force in the pulling direction b are blocked by the lateral reinforcing material 12d, and below the upper surface 12a. , The upward couple P is less likely to decrease.

  In this way, since the upper surface 12a of the bottom member 12 is formed in a rail shape in which a part of the lower surface 11d of the door body 11 can come into contact with the pair of H girders 12B, Since the substantially arc-shaped or substantially trapezoidal portion may be a part, the manufacturing cost of the upper surface 12a is greatly reduced (about 1/3 to 1/4) compared to the case of the whole as shown in FIG. . In addition, since the amount of shellfish (which may be an obstacle to swinging of the door body 11) with respect to the upper surface 12a is reduced, the application cost of the adhesion preventing material is also reduced. If the upper surface 12a is a mirror surface or the upper surface 12a is coated with a synthetic resin material, the amount of shellfish attached can be further reduced.

  As shown in FIG. 11C, the space between the pair of H beams 12B can be further reinforced with the reinforcing material 12f. In this case, the reinforcing member 12f also functions as a restricting member that restricts the belts 4 to 7 from entering the recess 12b. The recess 12b is preferably formed in a U shape so that the belts 4 to 7 are not caught.

  12A is a plan view of a box girder type water bottom laying member 12 having a recess 12b, FIG. 12B is an enlarged sectional view taken along line II of FIG. 12A, and FIG. FIG. 4D is an enlarged sectional view taken along line II, FIG. 4D is an enlarged sectional view taken along line II of FIG. 5A, and FIG. 4E is a modified version of FIG. It is the II sectional expanded sectional view of the example (a).

  The box girder type water bottom laying member 12 having the recess 12b in FIG. 12 (b) is formed as a pair of box girders 12C by welding and fixing reinforcing plates 12g on both sides of the H girders 12B. . FIG. 12C is a diagram in which the space between two pairs of box girders 12C is further reinforced by a reinforcing material 12f. The box girder type is stronger than the H girder.

  FIG. 12D shows a pair of boxes by welding and fixing the reinforcing plates 12g on both sides of the upper member 12j and the lower member 12k which are the upper surface 12a of the water bottom laying member 12 without using the H beam 12B. The digit 12C is used. FIG. 12E shows a further reinforcement between the pair of box girders 12C with a reinforcing material 12f.

  13 (a) is a plan view of a box girder type water bottom laying member 12 having no recess 12b, FIG. 13 (b) is an enlarged sectional view taken along line II of FIG. 13 (a), and FIG. It is an II line expanded sectional view.

  In the box girder type water bottom laying member 12 having no recess 12b in FIG. 13 (a), the reinforcing plates 12g are welded and fixed to both sides of the upper member 12j and the lower member 12k which are the upper surface 12a of the water bottom laying member 12, respectively. Thus, a wide box girder 12C is formed. FIG. 13C is a diagram in which the inside of one wide box girder 12C is further reinforced with a reinforcing material 12g.

  Since the water bottom laying member 12 in FIGS. 13A to 13C does not have the recess 12b, the belts 4 to 7 are fitted on the lower surface 11d as shown in FIGS. 14D and 14E. It is suitable to use in combination with the door body 11 in which the recessed portion 11g capable of being stuck is formed.

  As shown in FIG. 14 (c), the fixed girder 12 m of the water bottom laying member 12 is fixed to the concrete anchor block 35 of the water bottom 33 with a plurality of anchor bolts 37 while adjusting the height with the liner 36. Become.

  In the said embodiment, although the one door body 11 was demonstrated, when the width | variety of the entrance / exit 31 etc. which were partitioned off by the fixed breakwater 30 of a harbor is wide like FIGS. A plurality are arranged side by side so that the width can be covered.

  In this case, it is preferable to provide a guide plate 14 (see FIG. 3A) that restricts the lateral movement of the door body 11 between the adjacent door bodies 11. The guide plate 14 can reliably restrict the lateral movement of the horizontally aligned door bodies 11.

  In the above-described embodiment, the door 11 is installed on the water bottom laying member 12 at the lying position D by filling the hollow portion 13 of the door 11 with an appropriate amount of liquid or solid (iron lump etc.). Similarly to Patent Document 3, the undulation state of the door body 11 is controlled by providing a liquid valve capable of supplying and discharging liquid and a gas valve capable of supplying and discharging gas in the hollow portion 13 of the door body 11. You can also. Moreover, the hollow part 13 of the door body 11 is divided into two chambers between the one end part 11a and the other end part 11b, and a liquid valve and a gas valve are respectively provided in the hollow part of each chamber, whereby the door body 11 is provided. It is also possible to control the undulation state. Further, by attaching buoys to the one end portion 11a and the other end portion 11b of the door body 11, it is possible to easily confirm the lying position D and the standing positions U1, U2 of the door body 11 on the water surface.

  The undulation-type wave breaker of the above embodiment is based on the premise that the water bottom laying member 12 and the door body 11 are installed on the water bottom such as the entrance / exit (water channel) 11 or river estuary partitioned by the fixed breakwater 30 of the harbor. However, it is not limited to these. For example, it can be installed on the upper surface of a breakwater or the like in a harbor or a river (if water is generated by pushing waves or pulling waves, it becomes a floor member for the bottom of the water). It can also be installed in place of sluice gates, sluice gates, tide doors of seawalls, etc.

4 First fixing belt 5 Second fixing belt 6 First retaining belt (first holding member)
7 Second retaining belt (second holding member)
11 Door 11a One end 11b Other end 11c Upper surface 11d Lower surface 11g Recess 12 Water bottom laying member 12a Upper surface 12b Recess 13 Hollow portion a Pushing wave direction b Pulling wave direction f Clearance (elevation angle)
D Lodging position K Horizontal plane U1, U2 Standing position

Claims (7)

It is swingable between a lying position that falls in a substantially parallel state with respect to the water bottom laying member and a standing position that rises in a substantially vertical state with respect to the water bottom laying member. And the other end receiving the wave force in the direction of the pulling wave are set above the water bottom laying member, and the space between the bottom surface contacting the water bottom laying member from each end, A door formed in a substantially arcuate or substantially trapezoidal shape downward in a side view;
A first fixed belt having one end connected to the water bottom laying member in the direction of the push wave and the other end connected to the vicinity of the other end of the door body so as to swingably support the other end of the door body. When,
A second fixed belt, one end of which is connected to the water bottom laying member in the wave direction, the other end is connected to the vicinity of one end of the door body, and the one end of the door body is swingably supported;
A first holding member that holds the door body in an upright position against wave force in a pushing wave direction;
In the undulating wavebreaker comprising the second holding member that holds the door body in the standing position against the wave force in the pulling wave direction,
The first holding member has one end connected to the water bottom laying member in the push wave direction, and the other end connected to the vicinity of one end of the door body to resist the wave force in the push wave direction. A first retaining belt that is held in an upright position,
The second holding member has one end connected to the water bottom laying member in the wave pulling direction and the other end connected to the vicinity of one end of the door body to resist the wave force in the wave pulling direction. A second retaining belt that holds in an upright position,
At least the push wave direction side of the upper surface facing the lower surface of the door body in the water bottom laying member is formed in a substantially arc shape or a substantially trapezoidal shape upward in a side view ,
At least one of the upper surface of the water bottom laying member and the lower surface of the door body is formed with a concave portion into which the belt can be fitted at a portion where the belt is located. Wave equipment. 2. The undulation according to claim 1, wherein an upper surface of the water bottom laying member is formed in a substantially arcuate shape or a substantially trapezoidal shape in an upward direction in a side view in both a pushing wave direction side and a drawing wave direction side. Type wave breaker. The top surface of the water bottom laying member is formed in a substantially arcuate or substantially trapezoidal shape with the pushing wave direction side upward in a side view, and the drawing wave side is formed on a flat surface that is substantially horizontal or inclined upward. The undulating wave breaker according to claim 1. The lower surface between the one end portion and the other end portion of the door body is formed in a substantially arc shape or a substantially trapezoidal shape downward in a side view, and the upper surface is formed in a flat shape. The undulation type wave breaker according to any one of 1 to 3 . Upper surface of the sea bed for laying member, the swinging direction of the door body, claim 1-4, wherein a portion of the lower surface of the door body is formed in a shape capable of contacting rail The undulating wave breaker according to one item. The door has a plurality are arranged side by side form, between the door body adjacent any of claims 1-5, characterized in that the guide plate for restricting the lateral movement of the door body is provided The undulating wave breaker according to claim 1. The undulating wavebreaker according to any one of claims 1 to 6 , wherein the door body is formed in a hollow shape, and the hollow portion is filled with a liquid.

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