JP5988483B2 - Swing breakwater - Google Patents

Description

  The present invention relates to a rocking breakwater.

  Conventionally, a foundation having an oscillating support portion (hinge) that can oscillate in the horizontal axis is provided on the seabed at a point where tsunami progression is to be prevented. And the tsunami breakwater which arrange | positions the water stop board (door body) provided with the rocking | fluctuation support part (hinge) which functions by combining with the rocking | fluctuation support part on this foundation by setting the side with a rocking | fluctuation support part as a land side. (See Patent Document 1).

  In the tsunami breakwater disclosed in Patent Document 1, the waterstop plate falls near the seabed in normal times, and when the tsunami arrives, the waterstop plate stands up automatically by the wave force of the tsunami.

  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 increases.

  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.

  Furthermore, in order to stabilize the standing water plate when standing, a water rope standing posture holding mechanism using a wire rope, chain or link is provided, but in order to reduce the load on the wire rope, the wire rope There is a problem that it is necessary to provide shock absorbers corresponding to the number of the above.

  Here, the wire rope connects the end point provided on the wave receiving surface of the water stop plate and the end point provided on the seabed when standing up, but directly receives the strong tsunami wave force when the water stop plate stands up. Since it is a part, the connecting structure of each end point must be extremely strong in practice. In addition, since the wire rope is corroded and scratched, it is necessary to periodically replace it with a new one. Therefore, it is necessary to be able to be easily replaced by a diver underwater while maintaining a strong connection structure.

  In order to solve the above-mentioned problems, the applicant of the present application 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 also applies to push waves. A rocking breakwater (undulation-type breakwater device) that can handle pulling waves has been proposed (Patent Document 2).

  As shown in FIGS. 21A and 21B, such a rocking breakwater is generally located with respect to a lying position D that falls in a substantially parallel state with respect to the water bottom 2 that is a substantially horizontal flat surface, and to the water bottom 2. A door body 1 that can swing is provided at a standing position U1 (see FIGS. 22A and 22B) and U2 (see FIGS. 23A and 23B) that rise in a vertical state. 22 (a) and 22 (b), for example, the door 1 is a huge structure having a lateral width W1 of about 60 m and a standing height H1 of about 20 m. It is installed on the sea floor of about 15m.

  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 retaining 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 in the standing position U2 against the wave force in the wave direction b. A second retaining belt 7 is provided.

  Here, if the lateral width W1 of the door body 1 is about 60 m and the height T1 is about 20 m, each retaining belt 6 (7) has a length of about 40 m, a width of about 3 m, and a thickness. Is about 12 to 15 cm, and the weight per one is about 1 t (ton). And when receiving the strong wave force like a tsunami, it is estimated that the length of the retaining belt 6 (7) extends by about 1 to 3 m.

  According to this oscillating breakwater, the door 1 (gate) is in the normal position of FIGS. 21 (a) and 21 (b), the lying position D of the water bottom 2 (for example, about 0 degrees with respect to the water bottom, and so on). Will not affect the navigation of the ship.

  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 1a of the door body 1 and the bottom surface 2 as shown in FIGS. Flows into the gap (elevation angle) f [see FIG. 21 (b)], a couple 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 U <b> 1 against the wave force in the pushing wave direction a by the first retaining belt 6. As a result, the push wave is suppressed by the door body 11 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 wave direction b by the second retaining belt 7. As a result, the pulling wave is suppressed by the door body 1 at the standing position U2.

  If such a oscillating breakwater is installed at the entrance (waterway) partitioned by a fixed breakwater at the port, it is possible to prevent the tide level in the port from abruptly rising due to the tsunami and other waves, An effect such as being able to suppress a sudden drop in the tide level in the harbor can be achieved.

  In addition, although it differs from the huge rocking breakwater like patent document 2, as shown in FIG. 24, at the bottom 40a of the water channel 40, between the standing position U on the upstream side and the lying position D on the downstream side. A door body 41 clamped to be rotatable and a bag body 42 installed on the downstream side of the door body 41 are provided, and the door body 41 is rotated in the standing direction by the expansion of the bag body 42 by the supply of fluid. There is a raising / lowering gate that is moved and the door body 41 is rotated in the lying down direction by contraction of the bag body 42 by discharging the fluid (Patent Document 3).

  In such an undulating gate, the lateral width of the door body 41 is about 1 to 50 m (when the width exceeds 10 m, door bodies having a lateral width of about 10 m are arranged side by side for the necessary lateral width). The height at the time of standing is about 1.5 m, and it is for controlling the water level on the upstream side, so it is not expected to receive a strong wave force like a tsunami.

  Even in this undulating gate, the retaining belt 43 is provided, but only restricts the door body 41 that rotates in the standing direction by the expansion of the bag body 42 to the maximum standing position.

  Accordingly, the retaining belt 43 has the one end 43a fixed to the door body 41 side and the other end 43b fixed to the water channel 40 side while the pressing flat bar 44 holds the bolt, and the bolts of the one end 43a and the other end 43b. It is fixed with a bolt 45 that is screwed into the door body 41 through a through hole.

  In this case, although the strength decreases because the bolt penetration hole is made in the one end 43a and the other end 43b of the retaining belt 43, there is no practical problem because the door body 41 is only restricted to the maximum standing position.

  Further, the door body 41 is fixed to the bottom portion 40a of the water channel 40 via the flexible membrane 46a, the clamp 46b, the stopper 46c, and the anchor bolt 46d. 40 is configured to be rotatable between a standing position U on the upstream side and a lying position D on the downstream side.

  In this case, the flexible membrane 46a employs a structure that is fixed to the bottom 40a of the water channel 40 with a clamp 46b and an anchor bolt 46d, but the door body 41 has a width of about 10 m and a height of about 1. It is about 5m. For this reason, since it is not assumed to receive a strong wave force such as a tsunami, the end of the flexible membrane 46a is a simple connection structure that is simply pressed against the bottom 40a of the water channel 40 by the clamp 46b. In addition, since the flexible membrane 46a and the clamp 46b each have a weight of about several kilograms and a water depth of about 1.5 m, the replacement work in water at the time of regular replacement does not have much problem.

JP 2006-342653 A JP 2010-265618 A JP 2005-76277 A

  Here, in the oscillating breakwater as in Patent Document 2, the connecting structure at both ends of the retaining belt 6 (7) that connects the end portions 1a, 1b of the door body 1 and the water bottom surface 2 is a powerful tsunami. In order to be able to withstand even if directly subjected to wave power, it has a strong connection structure, but at the time of regular replacement, it can be easily replaced by a diver underwater at a water depth of about 10 to 15 m. There was a request.

  The present invention has been made in order to meet the above-mentioned demand, and the water depth is 10 to 15 m at the time of periodic replacement while the both ends of the retaining belt for connecting the end portion of the door body and the bottom surface of the water are firmly connected. The purpose of the present invention is to provide an oscillating breakwater that can be easily replaced by a diver underwater.

  In order to solve the above-mentioned problems, the present invention can swing between a lying position that falls in a substantially parallel state with respect to a water bottom member installed on the water bottom and a standing position that rises in a substantially vertical state with respect to the water bottom member. In the lying 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 member, and the water bottom member Between the lower surface and the lower surface in contact with the door body formed in a substantially arcuate or substantially trapezoidal shape downward in a side view, and one end connected to the water bottom member in the push wave direction, and the other end of the door body One end is connected to the first fixing belt connected to the vicinity of the end portion so as to swing the other end portion of the door body, and the water bottom member in the pulling direction, and the other end is one end of the door body. Connected to the vicinity of the first portion, and supports one end portion of the door body to be swingable. A fixing belt, a first retaining belt that holds the door body in a standing position against wave force in a pushing wave direction, and a door that holds the door body in a standing position against wave force in a pulling wave direction. In the oscillating breakwater provided with the second retaining belt, the retaining belt is made of a flexible rubber reinforced with synthetic fiber material or steel material, and the first retaining belt is in the direction of the pushing wave. One end is connected to the clamp member of the water bottom member, the other end is connected to the clamp member at one end portion of the door body, and the second retaining belt has one end connected to the clamp member of the water bottom member in the pulling direction and the other end. Is connected to a clamp member at the other end of the door body, and the fastening belt is formed at the end of the shaft shape by inserting a fixed shaft through the hollow portion of the folded portion at one end and the other end. The member is the water bottom member or One end of the flat portion is swingably connected to the base plate fixed to the door body by a hinge shaft, and is formed at the other end of the flat portion, and the shaft-shaped end portion of the one end or the other end of the retaining belt is A clamp part having at least a pressing part to be pressed between the base plate and the clamp part, or a pressing part of the clamp part or the base plate is formed with a protrusion that fits into a hollow part of the shaft-shaped end of the retaining belt, The flat part of the clamp member is provided with a oscillating breakwater that is provided with bolts and nuts for fixing the flat part to the base plate in a state of facing the base plate. is there.

  According to a second aspect of the present invention, a bracket in which a hook hole for hooking a hook of a crane on water is formed across the flat portion of the clamp member and the outer surface of the clamp portion may be fixed.

  According to a third aspect of the present invention, the clamp member may be divided into a plurality of pieces in the width direction of the retaining belt.

  According to a fourth aspect of the present invention, notches in the direction perpendicular to the axis are formed at both ends of the fixed shaft at the shaft-shaped end of the retaining belt, and the end of the clamp portion corresponding to both ends of the fixed shaft is formed. Can be configured to be provided with a retaining plate that engages with the cut portion when fitted into the shaft-shaped end portion of the retaining belt from above.

As in claim 5, the clamping members before Kisui bottom member, the top surface of the sea bed member may be a configuration that is disposed through a folding axis member of the anchoring belt.
According to a sixth aspect of the present invention, the clamp member of the water-bottom member is installed on the inclined surface of the water-bottom member so as to face at an angle substantially equal to the inclination angle of the retaining belt when the door body stands up. It can be.

  According to a seventh aspect of the present invention, the clamp member of the door body may be installed on the upper surface of the door body so that the retaining belt is folded back at the curved surface portion at the end of the door body.

  As described in claim 8, the clamp member of the door body is installed on the upper surface of the door body so that the retaining belt is folded back at the curved surface portion in the recess at the end of the door body. Can do.

  According to the present invention, the door body does not affect the navigation of the ship and the like because it normally falls to the lying position of the water bottom member.

  When a push wave is generated by a tsunami, storm surge, secondary vibration, etc., the door body rotates to the standing position by the wave force of the push wave and stands up against the wave force in the push wave direction by the first retaining belt. As a result of being held in the position, the push wave is suppressed by the door body in the standing position.

  On the other hand, when the push wave ends and then the pulling wave is generated, the door body is rotated to the standing position by the wave force of the pulling wave, and the second retaining belt resists the wave force in the pulling wave direction to the standing position. As a result, the pulling wave is suppressed by the door body in the standing position.

  If the swing breakwater is installed at the entrance (waterway) partitioned by the harbor breakwater in this way, it is possible to suppress the tide level in the port from rising rapidly due to the push wave, and the tide level in the port due to the pulling wave An effect such as being able to suppress the lowering can be achieved.

  Here, the retaining belt is made of rubber reinforced with a synthetic fiber material or steel material, and the first retaining belt has one end connected to the clamp member of the bottom member in the direction of the push wave and the other end of the door body. It is connected to a clamp member at one end. The second retaining belt has one end connected to the clamp member of the water bottom member in the pulling wave direction and the other end connected to the clamp member at the other end of the door body. Further, a fixed shaft is inserted through the hollow portion of the folded portion at one end and the other end of the retaining belt to form a shaft-shaped end portion.

  The clamp member includes a base plate fixed to the water bottom member or the door body, a flat portion connected to the base plate in a swingable manner by a hinge shaft, and one end of the retaining belt at the other end or an axial end of the other end. The clamp part has at least a pressing part for pressing between the base plate and the flat part of the clamp member is fixed to the base plate with bolts and nuts in a state of facing the base plate.

  Therefore, the clamp part of the clamp member on the water bottom member side is swung in the opening direction, and after placing the shaft-shaped end of one end of the retaining belt on the base plate, the clamp part is swung in the closing direction, The flat portion can be fixed to the base plate with bolts and nuts while the shaft end is pressed between the base plate and the flat portion facing the base plate.

  Similarly, after swinging the clamp part of the clamp member on the door body side in the opening direction and placing the shaft-shaped end of the other end of the retaining belt on the base plate, swing the clamp part in the closing direction to clamp The flat portion can be fixed to the base plate with bolts and nuts while the shaft-shaped end portion is pressed between the base plate and the flat portion facing the base plate.

  In this way, both ends of the retaining belt can have a strong coupling structure so that the clamp member can sufficiently withstand even if the strong tsunami wave force is directly received. In particular, because the protrusion of the clamp part or the protrusion of the base plate is fitted in the recess of the shaft-shaped end of the retaining belt, the strong tsunami wave force acting on the retaining belt Can be evenly received by the entire shaft-shaped end, so that if the bolt through hole as in the cited document 3 is drilled in the retaining belt and fixed with the bolt, the strength is lowered, but such a fear is eliminated.

  In addition, referring to FIG. 1, if the lateral width W1 of the door body 11 is about 60 m and the height H1 is about 20 m, the retaining belt has a length of about 40 m and a width of about 3 m. The thickness is about 12 to 15 cm, and the weight per one is about 1 t (ton).

  During regular replacement of retaining belts of such size and weight, remove the bolts and nuts that fix the flat part to the base plate and swing the clamp part in the opening direction for both the bottom and door clamp members. Then, after removing the shaft-shaped end of the old retaining belt from the base plate and replacing it with the shaft-shaped end of the new retaining belt, swing the clamp part in the closing direction to With the shaft-shaped end portion pressed between the base plate and the flat portion facing the base plate, the flat portion can be fixed to the base plate with bolts and nuts.

  In this way, it is possible to replace the retaining belt only by screwing / unscrewing bolts / nuts, opening / closing the clamp, and replacing the shaft-shaped end of the retaining belt. Exchange work by divers can be performed easily.

  In addition, since the retaining belt is made of rubber reinforced with a synthetic fiber material or steel material, when subjected to a strong wave force such as a tsunami, its length increases by about 1 to 3 m. In the wire rope which is the water stop plate standing posture holding mechanism 1, it is not necessary to provide a necessary shock absorber. Moreover, unlike steel wire ropes and chains, there is no risk of rusting even when immersed in seawater for a long period of time.

  According to the second aspect, even if the clamp portion of the clamp member adopting the firm connection structure of the retaining belt is divided into a plurality of, for example, five in the width direction of the retaining belt, for example, about 1 t ( The diver cannot be manually opened and closed. Therefore, by hooking a hook of a crane mounted on a ship on the water into the hook hole, the clamp portion can be easily opened and closed using the crane.

  According to the third aspect of the present invention, the clamp member is divided into a plurality of, for example, five pieces in the width direction of the retaining belt, so that the weight per piece can be set to about 1 t (tons), for example. The clamp portion can be opened and closed using a small crane mounted on the ship.

  According to the fourth aspect of the present invention, the notch portions in the direction perpendicular to the axis are formed at both ends of the fixed shaft of the shaft-shaped end portion of the retaining belt, and the shaft-shaped end portion of the retaining belt is fitted from above into the clamp portion of the clamp member. Since the retaining plate that engages with the notch is provided when it is stuck, the fixed shaft of the retaining belt does not come off in the axial direction from the hollow portion of the folded portion, and the end of the retaining belt is inadvertently removed from the clamp member. It is possible to prevent the problem of falling off.

According to the fifth aspect, when the clamp member of the water bottom member is installed on the upper surface of the water bottom member, the retention belt can be easily folded back by providing the folding shaft member of the retention belt. In addition, since the clamping force of the clamping belt is distributed between the clamp member and the folded shaft member, the durability of the clamp member is improved.
According to claim 6, the clamp member of the water bottom member is installed on the inclined surface of the water bottom member so as to face each other at an angle substantially equal to the inclination angle of the retaining belt when the door body stands up. A shearing force associated with the retaining force of the retaining belt acts on the bolts and the like that are fixed to the member. Accordingly, since it is not a pulling force, durability of bolts and the like is improved.

  According to the seventh aspect, when the clamp member of the door body is installed on the upper surface of the door body, the retaining belt is folded back at the curved surface portion of the end portion of the door body. Since the retaining force of the retaining belt is dispersed, the durability of the door body is improved.

  According to the eighth aspect, when the clamp member of the door body is installed on the upper surface of the door body, the retaining belt is folded back at the curved surface portion of the concave portion at the end of the door body. Since the retaining force of the retaining belt is dispersed at the curved surface portion of the recess, the durability of the door body is improved.

It is the rocking | fluctuation type breakwater of embodiment of this invention, (a) is a top view at normal time, (b) is a side view. It is a rocking | fluctuation type breakwater of embodiment of this invention, (a) is a top view at the time of pushing wave, (b) is a side view. It is the rocking | fluctuation type breakwater of embodiment of this invention, (a) is a top view at the time of a wave-drawing, (b) is a side view. It is a normal perspective view of the rocking breakwater corresponding to FIG. It is a perspective view at the time of the pushing wave of the rocking | swiveling breakwater corresponding to FIG.2 (b). It is a perspective view at the time of the pulling of the rocking breakwater corresponding to FIG.3 (b). It is a disassembled perspective view of a door body and a water bottom member. (A) is a top view of the door body which stood up at the time of a push wave, (b) is the front view seen from the land side of (a). It is a door body that employs the first clamp member of the fastening belt connecting structure, (a) is a side view of the standing position at the time of pushing wave, (b) is a side view of the standing position at the time of pulling wave, (c) is It is a side view of a lying position. It is a door body adopting the second clamp member of the connection structure of the retaining belt, (a) is a side view of the standing position at the time of pushing wave, (b) is a side view of the standing position at the time of pulling wave, (c) is It is a side view of a lying position. It is a 2nd clamp member, (a) is a perspective view when a clamp part is open, (b) is a side view when a clamp part is open. It is a 2nd clamp member, (a) is a front view when a clamp part is open, (b) is a top view when a clamp part is open. FIG. 2A is a perspective view when the clamp portion is closed, FIG. 2B is a side view when the clamp portion is closed, and FIG. 2C is an enlarged cross-sectional view of a main portion of FIG. It is a 2nd clamp member, (a) is a front view when a clamp part is closed, (b) is a top view when a clamp part is closed. It is a 1st clamp member, (a) is a top view when a clamp part is closed, (b) is a side view of (a). It is a principal part enlarged view of Fig.15 (a). It is a 1st clamp member with a return axis | shaft, (a) is a top view when a clamp part is closed, (b) is a side view of (a). It is a principal part enlarged view of Fig.17 (a). It is a 2nd clamp member, (a) is side surface sectional drawing at the time of a clamp part being closed, (b) is a principal part enlarged view of (a). It is the 2nd clamp member of a door body, (a) is side surface sectional drawing, (b) is the principal part enlarged view of (a), (c) is side surface sectional drawing of a modification. It is a rocking | fluctuation type breakwater of patent document 2, (a) is a top view at normal time, (b) is a side view. It is a rocking | fluctuation type breakwater of patent document 2, (a) is a top view at the time of pushing wave, (b) is a side view. It is a rocking | fluctuation type breakwater of patent document 2, (a) is a top view at the time of a drawing wave, (b) is a side view. It is a side view of the relief gate of patent document 3.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. Note that parts having the same configurations and functions as those in FIGS.

  1 to 3 and 4 to 6 are oscillating 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 11 is installed at the upper part of the water bottom member 12 installed at the water bottom 33 such as an entrance / exit (water channel) 31 or a river estuary partitioned by the fixed breakwater 30 of the harbor. .

  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 or the like is wide, as shown in FIGS. 4 to 6, a plurality of units (in a side-by-side manner through the partition plate 14 (see FIGS. 3 and 4)) can be covered so In this example, three units) are arranged. In practice, for example, the door body 11 has a lateral width W1 of about 60 m, a height T1 of about 20 m, and a substantially arc-shaped maximum thickness J1 described later of about 1.2 m.

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

  The door body 11 has an end portion 11a that receives wave force in the pushing wave direction a and an other end portion 11b that receives wave force in the pulling wave direction b above the water bottom member 12 at the normal lying position D, respectively. Is set to A space between at least the end portions 11a and 11b and the lower surface 11d contacting the water bottom 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 upper position of the water bottom member 12 in the fall position D. It is also possible to fill a solid (iron lump etc.) instead of the liquid.

  Referring to FIG. 7, the water bottom member 12 is welded in combination with the upper surface 12a such as a stainless steel plate and a steel material that serves as a column portion or a beam portion for supporting the upper surface 12a. is set up. Specifically, as shown in FIG. 4, the water bottom member 12 is installed on the bottom of the recess 33 a formed in the water bottom 33, and the door body 11 installed on the top of the water bottom member 12 is the door body 11 in the lying position D. The upper surface 11c is set so as not to protrude greatly above the water bottom 33 so as not to hinder the navigation of the ship 34 or the like.

  An upper surface 12a facing the lower surface 11d of the door body 11 in the water bottom member 12 is formed in a substantially arc shape upward in a side view. The substantially arcuate maximum thickness J2 is about 1.2 m, like the lower surface 11d of the door body 11.

  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 member 12 are formed in a substantially arcuate shape that is substantially line symmetric and downward and upward. Become.

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

  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 member 12 in the push 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 portion 11 b of the door body 11. It is connected to. In addition, if the connection structure with respect to the water bottom member 12 and the door body 11 of the 1st fixing belt 4 is the same structure as the fastening belt 6 (7) mentioned later, the same clamp as the fastening belt 6 (7) will be used. The member 15 (described later) can be used.

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

  A flexible first retaining belt 6 is provided at the same position as each first fixing belt 4 (can be shifted in the width direction). The first retaining belt 6 has one end 6 a connected to the water bottom 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 one end of the door body 11. 11a. The connection structure between the one end 6a and the other end 6b of the first retaining belt 6 will be described in detail later.

  When the first retaining belt 6 rolls clockwise Q after the door body 11 rolls in the right direction from the lying position D and rises to the standing position U1 in the pushing wave direction a by the first fixed belt 4, the door body 11 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 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 5 a connected to the water bottom member 12 in the wave pulling direction b, extending along the lower surface 11 d of the door body 11, and the other end 5 b being one end of the door body 11. It is connected to the part 11a. The connection structure of the second fixing belt 5 to the water bottom member 12 and the door body 11 is the same clamp as that of the retaining belt 6 (7) if the fixing belt 5 has the same structure as the retaining belt 6 (7) described later. The member 15 (described later) can be used.

  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 pulls the wave with the one end 11a in contact with the water bottom member 12 as a fulcrum. The length is such that it rises to the standing position U2 in the direction b.

  A flexible second retaining belt 7 is provided at the same position as each of the second fixing belts 5 (can be shifted in the width direction). One end 7 a of the second retaining belt 7 is connected to the water bottom 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 the other end of the door body 11. It is connected to the part 11b. The connection structure between the one end 7a and the other end 7b of the second retaining belt 7 will be described in detail later.

  The second retaining belt 7 rotates left [see FIG. 3 (b)] after the door 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 belt 4-7 is made of flexible rubber reinforced with synthetic fiber material or steel material. Specifically, referring to FIGS. 11A and 11B, the retaining belt 6 (7) is formed by laminating a tension layer 6c on one side and a cut-resistant layer 6d on the other side.

  The tension layer 6c is a multi-layered laminate in which a plurality of synthetic fiber cords are arranged in the width direction and extend in the length direction in the rubber layer, and is responsible for the tensile force in the length direction. It is. Specifically, the tension layer 6c is, for example, a laminate of 15 to 25 tension layers 6c having a thickness of about 3.3 mm, and the total thickness is about 60 mm.

  The cut-resistant layer 6d is formed by arranging a plurality of steel cords in the length direction in the rubber layer and extending in the width direction, and is responsible for protecting the tension layer 6c. Specifically, the cut-resistant layer 6d is, for example, a laminate of two cut-resistant layers 6d having a thickness of about 30 mm, and the total thickness is about 60 mm. In this example, the total thickness of the tension layer 6c is about 60 mm, and the total thickness of the two layers of the cut-resistant layer 6d is about 60 mm, for a total thickness of about 120 mm (about 12 cm). The cut resistant layer 6d is a bias structure in which steel cords of adjacent layers cross each other at a bias angle of 10 to 30 degrees.

  The tension layer 6c of the retaining belt 6 is formed in an endless (loop) shape, and the two ends are joined between the one end 6a and the other end 6b, and in the hollow portion of the folded portion of the one end 6a and the other end 6b. The fixed shaft 16 is inserted in a penetrating state, and is formed in a circular shaft-shaped end portion 6e in a side view.

  In the above-described embodiment, each of the first retaining belt 6 and the second retaining belt 7 is used to a minimum, but a strong tsunami wave force acts on each retaining belt 6, 7. Depending on the situation, it is possible to increase the number of the retaining belts 6 and 7 to about 3 to 6.

  Fig.8 (a) is the top view of the door body 11 which stood up at the time of pushing wave a, The same (b) is the front view seen from the land side of (a). In the example of FIGS. 8A and 8B, the number of the retaining belts 6 and 7 is increased to four. Each of the fixed belts 4 and 5 is also increased to four.

  Next, the connection structure of the retaining belts 6 and 7 will be described. Since the connecting structures of the retaining belts 6 and 7 are the same, only the connecting structure of the retaining belt 6 will be described below.

  9A and 9B show the door body 11 that employs the first clamp member 15A ′ having a connection structure of the tension belt 6, wherein FIG. 9A is a side view of the standing position U1 during the pushing wave, and FIG. 9B is the standing body during the pulling wave. The side view of the position U2, (c) is a side view of the lying position D.

  10A and 10B show the door body 11 that employs the second clamp member 15B having the connection structure of the tension belt 6, wherein FIG. 10A is a side view of the standing position U1 during the pushing wave, and FIG. 10B is the standing position during the pulling wave. A side view of U2, (c) is a side view of the lying position D.

  9 and 10, the standing position U1 of the door body 11 at the time of the pushing wave is about 90 degrees, but the standing position U2 of the door body 11 at the time of the pulling wave is set to about 45 degrees. For this reason, the pulling belt direction retaining belt 7 has a shorter overall length than the pushing wave direction retaining belt 6.

  Since the basic structure of the first clamp member 15A and the second clamp member 15B is the same, first, the second clamp member 15B of FIG. 11 will be described. FIG. 11A is a perspective view when the clamp portion 15c is open, and FIG. 11B is a side view when the clamp portion 15c is open. 12A and 12B show the second clamp member 15B. FIG. 12A is a front view when the clamp portion 15c is opened, and FIG. 12B is a plan view when the clamp portion 15c is opened.

  13A and 13B show the second clamp member 15B, where FIG. 13A is a perspective view when the clamp portion 15c is closed, FIG. 13B is a side view when the clamp portion 15c is closed, and FIG. It is sectional drawing. 14A and 14B show the second clamp member 15B. FIG. 14A is a front view when the clamp portion 15c is closed, and FIG. 14B is a plan view when the clamp portion 15c is closed.

  A base plate 18 of the clamp member 15B is provided with a plurality of anchor bolts and nuts 22 (see FIG. 15) on the upper part of the reinforcing structure 19 (see FIG. 15) embedded in the foundation concrete 17 that becomes the base of the water bottom member 12. It is fixed. The base plate 18 is formed in a horizontally long rectangular shape that is slightly wider than the retaining belt 6. In addition, the height of the reinforcement structure 19 is about 3 m.

  The second clamp member 15B is connected to the base plate 18 at one end of the flat portion 15a so as to be swingable by a hinge shaft 15b, and is formed at the other end of the flat portion 15a. The clamp part 15c which has the pressing part 15p which presses down the part 6e between the base boards 18 is provided. A protrusion 15g that fits from above into the recess 6f of the shaft-shaped end 6e of the retaining belt 6 is formed in the pressing portion 15p of the clamp portion 15c.

  Specifically, a plurality (six in this example) of hinge fittings 15d are arranged at a constant interval in the length direction of the base plate 18, and each hinge fitting 15d is fixed to the base plate 18.

  Then, one end of each of the flat portions 15a of a plurality (five in this example) of the clamp members 15 is fitted between the adjacent hinge fittings 15d, and through-holes (one through each hinge fitting 15d and one end of each flat portion 15a ( (Not shown) and the hinge shaft 15b is continuously penetrated.

  Thereby, each 2nd clamp member 15B divided | segmented into plurality in the width direction of the fastening belt 6 can be opened / closed independently in the open position of FIG. 11 and the closed position of FIG.

  The flat portion 15a of each second clamp member 15B faces the base plate 18, that is, in the closed position of the clamp portion 15c, a plurality (two in this example) of bolts and nuts 20 (see FIG. 13). ) Will be fixed.

  When the clamp portion 15c is in the closed position, as shown in FIG. 13C, the pressing portion 15p of the clamp portion 15c presses the shaft-shaped end portion 6e of the retaining belt 6 between the base plate 18 and the projection portion 15g has the shaft shape. By fitting into the recess 6f of the end 6e from above, the substantially upper half of the shaft-shaped end 6e is held together with the fixed shaft 16. At the same time, the tension layer 6c of the retaining belt 6 is strongly pressed against the base plate 18 by the rounded lower end of the protrusion 15g. Thereby, there is no possibility that the one end 6a of the retaining belt 6 is detached from the clamp portion 15c. Further, since the lower end of the protruding portion 15g is rounded, there is no possibility that the one end 6a of the holding belt 6 that is pressed down, particularly the tension layer 6c, is damaged.

  A bracket 15f in which a hook hole 15e for hooking a crane hook on water is formed at a position between the two bolts and nuts 20 across the outer surface of the flat portion 15a and the clamp portion 15c of each second clamp member 15B. It is fixed.

  Cut ends 16a in the direction perpendicular to the axis are formed at both ends of the fixed shaft 16 of the shaft-shaped end portion 6e of the retaining belt 6, and the end face of the clamp portion 15c corresponding to both ends of the fixed shaft 16 is shown in FIG. As described above, the retaining plate 15h that is engaged with the cut portion 16a when the shaft-shaped end portion 6e of the retaining belt 6 is fitted from above is fixed by the bolt 15j.

  Next, the first clamp member 15A shown in FIGS. 15 and 16 will be described. FIG. 15A is a plan view when the clamp portion 15c is closed, and FIG. 15B is a side view of FIG. FIG. 16 is an enlarged view of the main part of FIG.

  The second clamp member 15B is different from the second clamp member 15B in that the pressing portion 15p of the clamp portion 15c is not formed with the projection 15g, and the base plate 18 is formed into the recess 6f of the shaft-shaped end 6e of the retaining belt 6 from below. The protrusion 18b to be fitted is formed.

  17 and 18 are also the first clamp member 15A. FIG. 17A is a plan view when the clamp portion 15c is closed, and FIG. 17B is a side view of FIG. FIG. 18 is an enlarged view of the main part of FIG.

  17 and 18, the first clamp member 15 </ b> A is fixed to one side of the base plate 18, and the folding shaft member 23 of the retaining belt 6 is fixed to the other side of the base plate 18 by the left and right brackets 24. The types shown in FIGS. 17 and 18 are distinguished from each other as the first clamp member 15 </ b> A ′ with the folding shaft.

  Here, the structure which installs each clamp member 15A, 15B in the basic concrete 17 used as the base of the water bottom member 12, and the door body 11 is demonstrated concretely.

  In the embodiment of FIG. 9, the first clamp member 15 </ b> A ′ with a folding shaft is used on the foundation concrete 17 side. The reinforcing structure 19 of the base plate 18 of the first clamp member 15 </ b> A ′ with the turn-back shaft is embedded in the foundation concrete 17 with the turn-back shaft member 23 on the push-wave a side.

  Further, the reinforcing structure 19 of the base plate 18 of the first clamp member 15 </ b> A ′ with the folding shaft is embedded in the foundation concrete 17, with the folding shaft member 23 on the drawing wave b side.

  Then, as shown in FIG. 18, the retaining belt 6 on the side of the push wave a is U-turned by the turn-back shaft member 23 so that the cut-resistant layer 6d faces the push wave a side, and then the shaft-shaped end of the one end 6a. The part 6e is connected to the first clamp member 15A ′.

  Similarly, the retaining belt 7 on the pulling wave b side is also U-turned by the folded shaft member 23 so that the cut-resistant layer 6d faces the pulling wave b side, and the shaft-shaped end portion of the one end 7a is first clamped. It connects with member 15A '.

  The second clamp member 15B is used on the door body 11 side. As shown in FIGS. 20 (a) and 20 (b), one end portion 11a (the same applies to the other end portion 11b) of the door body 11 is formed into an arcuate curved surface portion 11g. Specifically, a circular steel pipe is installed. The diameter of this steel pipe is, for example, about 500 mm.

  The second clamp member 15B is a reinforcing frame inside the door body 11 so that the second clamp member 15B faces the one end portion 11a in the vicinity of the one end portion 11a of the upper surface 11c of the door body 11. 25 is fixed using bolts and nuts 20.

  Then, after the fastening belt 6 is folded back in an inverted U shape at the curved surface portion 11g of the one end portion 11a of the door body 11 so that the cut-resistant layer 6d faces the pushing wave a, the shaft-shaped end portion 6e of the one end 6a is turned back. Is coupled to the second clamp member 15B.

  In addition, as shown in FIG.20 (c), the recessed part 11h is formed in the one end part 11a and the other end part 11b of the door body 11, and the retention belt 6 (7) is reverse-U-shaped by the curved surface part 11g in this recessed part 11h. It can also be folded back into a shape.

  In the embodiment of FIG. 10, the second clamp member 15B is used on the foundation concrete 17 side. As shown in FIGS. 19 (a) and 19 (b), the upper portion of the reinforcing structure 19 is inclined obliquely in a side view, and the base plate 18 of the second clamp member 15B is fixed to the inclined upper portion. This inclined surface is installed so as to face at an angle substantially equal to the inclination angle of the retaining belt 6 when the door body 11 stands.

  The reinforcement construction body 19 of the base plate 18 is embedded in the foundation concrete 17 with the upper end of the slope being the door body 11 side on the push wave a side.

  Further, the reinforcement construction body 19 of the base plate 18 is embedded in the foundation concrete 17 with the inclined upper end being the door body 11 side on the pulling wave b side.

  Then, the retaining belt 6 on the push wave a side connects the shaft-shaped end 6e of the one end 6a to the second clamp member 15B so that the cut-resistant layer 6d faces the push wave a side as shown in FIG. .

  Similarly, the retaining belt 7 on the pulling wave b side also connects the shaft-shaped end of the one end 7a to the second clamp member 15B so that the cut-resistant layer 6d faces the pulling wave b side.

  Further, on the door body 11 side, the second clamp member 15B is used to connect the shaft-shaped end of the other end 6b (7b) of the retaining belt 6 (7) to the second clamp member 15B as shown in FIG. This is the same as the embodiment.

  9 and 10, the first fixing belt 4 and the second fixing belt 5 have the same structure as the retaining belt 6 (7). The one end 4a of the first fixing belt 4 and the one end 5a of the second fixing belt 5 are fixed to the foundation concrete 17 by the second clamp member 15B, and the other end 4b of the first fixing belt 4 and the second end 5a are fixed. The other end 5b of the fixing belt 5 is fixed to the door body 11 by a second clamp member 15B. In this case, the cut resistant layer 6d faces upward.

  In the case of the swing type breakwater configured as described above, the door body 11 is normally in the fall position D of the water bottom member 12 (for example, about 0 degree with respect to the water bottom member 12, as shown in FIG. 1 or FIG. 4). Similarly, it does not affect the navigation of the ship 34. In this normal wave flow, the door body 11 is slightly swung.

  Then, as shown in FIG. 2 or FIG. 5, when a push wave is generated by a tsunami, storm surge, secondary vibration, etc., the door body 11 rotates to the standing position U1 by the wave force of the push wave, and the first retaining belt 6 As a result of being held at the standing position U1 against the wave force in the pushing wave direction a, the pushing wave is suppressed by the door body 11 at the standing position U1.

  On the other hand, as shown in FIG. 3 or FIG. 6, when the pushing wave ends and then the pulling wave is generated, the door body 11 rotates to the standing position U <b> 2 by the wave force of the pulling wave and is pulled by the second retaining belt 7. As a result of being held at the standing position U2 against the wave force in the wave direction b, the pulling wave is suppressed by the door body 11 at the standing position U2.

  In this way, if the oscillating breakwater is installed at the entrance (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, It becomes possible to suppress the tide level from dropping sharply.

  Here, the retaining belt 6 (7) is a rubber flexible retaining belt reinforced with a synthetic fiber material or steel material, and the first retaining belt 6 is a base of the water bottom member 12 in the pushing wave direction a. One end 6a is connected to the first (second) clamp members 15A and 15A ′ (15B) fixed to the foundation concrete 17 to be, and the other end 6b is connected to the second clamp member 15B of the one end portion 11a of the door body 11. ing. The second retaining belt 7 has one end 7a connected to the first (second) clamp members 15A and 15A ′ (15B) fixed to the foundation concrete 17 serving as the base of the water bottom member 12 in the wave drawing direction b, and the other end 7b is connected to the second clamp member 15B of the other end portion 11b of the door body 11. Further, one end 6a (7a) and the other end 6b (7b) of the retaining belt 6 (7) are formed into a shaft-shaped end portion 6e (7e) by inserting the fixed shaft 16 through the hollow portion of the folded portion in a penetrating state. ing.

  And each clamp member 15A, 15A ', 15B is rocked | fluctuated by the base axis | shaft 17 fixed to the foundation concrete 17 or the door body 11 used as the base of the water bottom member 12, and the flat part 15a on the base plate 18 with the hinge axis | shaft 15b. One end 6a. Of the retaining belt 6 (7) is connected to the other end freely. 7a or the other end 7a, 7b of the shaft-shaped end portion 6e (7e) is composed of a clamp portion 15c having a pressing portion 18p for pressing between the base plate 18 and the flat portion 15a of the clamp member 15 is the base plate 18 The base plate 18 is fixed with bolts 20 in a state of facing each other.

  Therefore, the clamp portion 15c of the clamp member 15 on the water bottom member 12 side is swung in the opening direction, and the shaft-shaped end portion 6e (7e) of the one end 6a (7a) of the retaining belt 6 (7) is placed on the base plate 18. After that, the clamp portion 15c is swung in the closing direction, and the shaft-shaped end portion 6e of the holding belt 6 is pressed between the base plate 18 and the flat portion 15a with the base plate 18 by the pressing portion 15p of the clamp portion 15c. The flat portion 15a can be fixed to the base plate 18 with bolts 20 in a state of facing each other.

  Similarly, the clamp portion 15c of the clamp member 15 on the door body 11 side is swung in the opening direction, and the shaft-shaped end portion 6e (7e) of the other end 6b (7b) of the retaining belt 6 (7) is placed on the base plate 11. The clamp portion 15c is swung in the closing direction, the shaft-shaped end portion 6e of the retaining belt 6 is pressed between the base plate 18 and the flat portion 15a by the pressing portion 15p of the clamp portion 15c. The flat portion 15 a can be fixed to the base plate 18 with the bolt 20 in a state of facing the 18.

  Thus, both ends 6a (7a) and 6b (7b) of the retaining belt 6 (7) can sufficiently withstand even if the strong tsunami wave force is directly received by the clamp members 15, 15A 'and 15B. Thus, it can be set as a firm connection structure.

  In particular, in the first clamp members 15A and 15A ', the protrusion 18b of the base plate 18 is fitted into the recess 6f of the shaft-shaped end 6e (7e) of the retaining belt 6 (7) from below. In the second clamp member 15B, the protrusion 15g of the clamp portion 15c is fitted from above into the recess 6f of the shaft-shaped end 6e (7e) of the retaining belt 6 (7). Accordingly, the strong tsunami wave force acting on the retaining belt 6 (7) can be evenly received by the entire shaft-shaped end portion 6e (7e) and the projections 18b and 15g. If the bolt through hole as in the cited document 3 is drilled and fixed with a bolt, the strength is lowered, but such a fear is eliminated.

  Further, referring to FIG. 1, if the lateral width W1 of the door body 11 is about 60 m and the height H1 is about 20 m, the retaining belt 6 (7) has a length of about 40 m and a width of about 10. About 3 m, thickness is about 12-15 cm, and the weight per one is about 1 t (ton).

  During regular replacement of the retaining belt 6 (7) of such size and weight, the flat portion 15a is fixed to the base plate 18 in any of the clamp members 15A, 15A ′, 15B on the water bottom member side 12 and the door body 11 side. If the bolts and nuts 20 are removed and the clamp portion 15c is swung in the opening direction, the shaft-shaped end portion 6e (7e) of the old retaining belt 6 (7) is removed from the base plate 18, and a new retaining belt is obtained. 6 (7) is replaced with the shaft-shaped end portion 6e (7e), the clamp portion 15c is swung in the closing direction, and the holding portion 15p of the clamp portion 15c is used as the base for the shaft-shaped end portion 6e of the retaining belt 6. The flat portion 15a can be fixed to the base plate 18 with bolts and nuts 20 while being pressed between the flat plate 15 and the flat portion 15a facing the base plate 18. .

  In this way, the fastening belt 6 (7) can be removed simply by screwing and unscrewing the bolts and nuts 20, opening and closing the clamp portion 15c, and replacing the shaft-shaped end 6e (7e) of the retaining belt 6 (7). Since the replacement can be performed, the replacement work by a diver in water having a water depth of about 10 to 15 m can be easily performed.

  In addition, since the retaining belt 6 (7) is made of rubber reinforced with synthetic fiber material or steel material, the length of the retaining belt 6 (7) increases by about 1 to 3 m when receiving a strong wave force such as a tsunami. In the wire rope which is the water stop plate standing posture holding mechanism of Patent Document 1, it is not necessary to provide a necessary shock absorber. Moreover, unlike steel wire ropes and chains, there is no risk of rusting even when immersed in seawater for a long period of time.

  On the other hand, a bracket 15f having a hook hole 15e for hooking a hook of a floating crane is fixed across the flat surface 15a of the clamp members 15A and 15B and the outer surface of the clamp portion 15c.

  That is, the clamp portions 15c of the clamp members 15A, 15A ′, 15B adopting a strong connection structure of the retaining belt 6 (7) are divided into a plurality, for example, five in the width direction of the retaining belt 6 (7). However, each unit has a weight of about 1 t (ton), for example, and cannot be manually opened and closed by a diver. Thus, by hooking a hook of a crane mounted on a ship on the water into the hook hole 15e, the clamp portion 15c can be easily opened and closed using the crane.

  Further, by providing the clamp members 15A, 15A ′, 15B by dividing the clamp members 15A, 15A ′, 15B into a plurality, for example, five in the width direction of the retaining belt 6 (7), the weight per one is set to, for example, about 1 t (ton). It is possible to open and close the clamp portion 15c using a small crane mounted on a watercraft.

  Furthermore, cut portions 16a in the direction perpendicular to the axis are formed at both ends of the fixed shaft 16 of the shaft-shaped end portion 6e (7e) of the retaining belt 6 (7), and the clamp portions 15c of the clamp members 15A, 15A ′, 15B are formed. Since the retaining portion 15h that engages with the cut portion 16a when the shaft-shaped end portion 6e (7e) of the retaining belt 6 (7) is fitted from above is provided, the retaining belt 6 (7) is fixed. It is possible to prevent a problem that the shaft 16 does not come off in the axial direction from the hollow portion of the folded portion and the end of the retaining belt 6 (7) is inadvertently dropped from the clamp members 15A, 15A ′, 15B.

  On the other hand, the foundation concrete which becomes the base of the water bottom member 12 so that the second clamp member 15B on the water bottom member 12 side faces at an angle substantially equal to the inclination angle θ of the retaining belt 6 (7) when the door body 11 stands. 17, the shearing force accompanying the retaining force of the retaining belt 6 (7) acts on the anchor bolt 22 and the like that fix the clamp member 15 </ b> B to the water bottom member 12. Accordingly, since the pulling force is not used, the durability of the anchor bolt 22 and the like is improved.

  Further, when the first clamp member 15A ′ of the water bottom member 12 is installed on the foundation concrete 17 serving as the base of the water bottom member 12, the folding belt member 6 (7) is provided by providing the folding shaft member 23 of the belt 6 (7). ) Can be folded back without difficulty. Further, since the retaining force of the retaining belt 6 (7) is distributed between the first clamp member 15A 'and the folding shaft member 23, the durability of the first clamp member 15A' is improved.

  Further, when the second clamp member 15B of the door body 11 is installed on the upper surface 11c of the door body 11, the retaining belt 6 (7) is folded back at the curved surface portions 11g of the end portions 11a and 11b of the door body 11. Therefore, the retaining force of the retaining belt 6 (7) is dispersed by the curved surface portions 11g of the end portions 11a and 11b of the door body 11, so that the durability of the door body 11 is improved.

  When the second clamp member 15B of the door body 11 is installed on the upper surface 11c of the door body 11, the retaining belt 6 (7) is folded back at the curved surface portion 11g of the concave portion 11h of the end portions 11a and 11b of the door body 11. Therefore, the retaining force of the retaining belt 6 (7) is dispersed by the curved surface portion 11g of the concave portion 11h of the end portions 11a and 11b of the door body 11, so that the durability of the door body 11 is improved.

4 First fixing belt 5 Second fixing belt 6 First retaining belt 6e Shaft-shaped end portion 6f Recessed portion 7 Second retaining belt 11 Door 11a One end portion 11b Other end portion 11d Lower surface 11g Curved portion 11h Recessed portion 12 Water bottom member 12a Upper surface 15 (A, A'B) Clamp member 15a Flat portion 15b Hinge shaft 15c Clamp portion 15e Hook hole 15f Bracket 15g Projection portion 15h Retaining plate 15p Holding portion 16 Fixed shaft 16a Cut portion 17 Basic concrete 17a Recessed portion 17b Inclined surface 17c Upper surface 18 Base plate 18b Protruding part 19 Reinforcement construction body 20 Bolt 22 Anchor bolt 23 Folding shaft part a Pushing wave direction b Pulling wave direction D Lodging position U1, U2 Standing position

Claims (8)

It can swing between a lying position that falls in a substantially parallel state with respect to the water bottom member installed on the water bottom and a standing position that rises in a substantially vertical state with respect to the water bottom member. One end that receives the force and the other end that receives the wave force in the direction of the pulling wave are set above the bottom member, and the space between each end and the bottom surface that contacts the bottom member is seen in a side view. A door that is formed in a generally downward arc or trapezoidal shape;
A first fixing belt, one end of which is connected to the water bottom member in the push wave direction, the other end is connected to the vicinity of the other end of the door body, and the other end of the door body is swingably supported;
A second fixed belt, one end of which is connected to the water bottom member in the wave direction, the other end of which is connected to the vicinity of one end of the door body, and supports the one end of the door body so as to be swingable;
A first retaining belt that holds the door body in an upright position against wave force in a pushing wave direction;
In a swing breakwater provided with a second retaining belt that holds the door body in an upright position against wave force in the pulling wave direction,
The retaining belt is made of flexible rubber reinforced with synthetic fiber material or steel material,
The first retaining belt has one end connected to the clamp member of the bottom member in the direction of the push wave, and the other end connected to the clamp member at one end of the door body,
One end of the second retaining belt is connected to the clamp member of the water bottom member in the wave direction, and the other end is connected to the clamp member at the other end of the door body,
The retaining belt is formed at a shaft-shaped end portion by inserting a fixed shaft through a hollow portion of a folded portion at one end and the other end in a penetrating state,
Each of the clamp members is connected to a base plate fixed to the water bottom member or the door body so that one end of a flat portion is swingably connected by a hinge shaft and is formed at the other end of the flat portion. Or a clamp part having at least a pressing part for pressing the other end of the shaft-shaped end part between the base plate,
On the pressing part of the clamp part or the base plate, a protruding part is formed that fits into the hollow part of the shaft-shaped end part of the retaining belt,
An oscillating breakwater, wherein the flat portion of the clamp member is provided with bolts and nuts for fixing the flat portion to the base plate in a state of facing the base plate.   The oscillating breakwater according to claim 1, wherein a bracket formed with a hook hole for hooking a hook of a crane on the water is fixed across the flat part of the clamp member and the outer surface of the clamp part.   The rocking breakwater according to claim 1 or 2, wherein the clamp member is divided into a plurality in the width direction of the retaining belt.   Cut ends in the direction orthogonal to the axis are formed at both ends of the fixed shaft at the shaft-shaped end of the retaining belt, and the shaft of the retaining belt is formed at the end of the clamp portion corresponding to both ends of the fixed shaft. The rocking breakwater according to any one of claims 1 to 3, further comprising a retaining plate that engages with the cut portion when fitted into the shape end portion from above. Clamping members before Kisui bottom member, the top surface of the sea bed member, oscillating according to any one of claims 1 to 4, characterized in that it is installed via a folding axis member of the anchoring belt Dynamic breakwater.   The clamp member of the water bottom member is installed on an inclined surface of the water bottom member so as to face each other at an angle substantially equal to an inclination angle of the retaining belt when the door body stands. The rocking type breakwater as described in any one of -5.   The clamp member of the said door body is installed in the upper surface of the said door body so that the said fastening belt may be folded in the curved surface part of the edge part of this door body. The rocking breakwater described in the item.   The clamp member of the said door body is installed in the upper surface of the said door body so that the said fastening belt may be folded in the curved surface part in the recessed part of the edge part of this door body. The rocking breakwater according to any one of the above.

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