JP2012177227A - Movable breakwater body and breakwater closing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable breakwater body hard to damage, easy to maintain and manage, and capable of surely blocking an opening between breakwaters in emergency.SOLUTION: A self-navigation breakwater 1 is provided for blocking the opening 82 between breakwaters 8, 8. It includes a hollow body part 2 formed as long as the width of the opening, and having a side face 21 shaped as a sloping face so as to be opposed to an end face 81 of the breakwater facing the opening, a flexible or elastic rubber gasket 3 continuously extended from the side face of the body part in its height direction, a water filling gate part 4 for communicating or freely screening an internal 2a of the body part with or from an external water area, and a draining device 6 for draining water stored inside the body part.

Description

  The present invention relates to a mobile breaker that can be used to close an opening between breakwaters that serve as an entrance of a port, and a breakwater blocking structure using the movable breaker.

  Conventionally, in order to prevent the water level in the port from fluctuating rapidly due to storm surges, tsunamis, etc., it is known to provide a movable breakwater that can be raised and lowered at the opening between the breakwaters that serve as the entrance to the port (Patent Documents 1-4). Etc.)

  The movable breakwater disclosed in Patent Document 1 closes the opening between breakwaters by raising a levitated steel pipe that has been submerged in the seabed ground in response to an order such as a tsunami warning. Further, Patent Document 2 discloses a configuration of a monitoring device for monitoring whether the movable breakwater is lifted or subsidized reliably.

  Further, Patent Documents 3 and 4 disclose undulating gates for closing openings between breakwaters. This undulating gate is normally closed to the seabed and is erected when a situation in which the tide level fluctuates greatly occurs to prevent fluctuations in the tide level in the harbor.

JP 2010-7355 A JP 2010-203079 A JP 2009-299428 A JP 2007-2111457 A

  However, the movable breakwaters and undulating gates disclosed in Patent Documents 1-4 operate at the time of an emergency when a tsunami or the like is applied to a movable mechanism that is always submerged in the seabed so as not to obstruct access to the port. Therefore, it is necessary to spend time and effort on maintenance.

  That is, there are many factors that hinder the normal operation of movable mechanisms such as burial by drifting sand, adhesion of shells and seaweeds, corrosion, and the like. In addition, there is a possibility that the movable mechanism may be damaged by the throwing from the ship.

  For this reason, it is necessary to perform maintenance regularly and to be able to operate reliably in an emergency. Even if a schedule for regular maintenance is established, if a tsunami occurs immediately after a sudden damage or failure, the breakwater cannot be closed and damage may occur.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile breaker and a breakwater blocking structure capable of reliably closing an opening between breakwaters in an emergency in addition to being easily damaged and maintained.

  In order to achieve the above object, the mobile wave breaker of the present invention is a mobile wave breaker for closing an opening between breakwaters, and is formed to have a length comparable to the width of the opening. A hollow main body having a side surface facing the end face of the breakwater facing the opening formed into an inclined surface, and a flexible or elastic stop extending continuously in the height direction on the side surface of the main body A water portion, a water injection gate portion that partitions the interior of the main body portion and an external water area so as to communicate or shield freely, and a drainage device that drains the water stored inside the main body portion. . Here, it is preferable to provide a propulsion device that moves the main body to an arbitrary position.

  Further, the breakwater blocking structure of the present invention includes the above-described mobile breaker and a pair of breakwaters formed with end faces to which the water stop portions provided on both sides of the breakwater can be closely attached, The end face of the breakwater facing the inclined surface of the wave body is an inclined surface in such a direction that the opening becomes narrower toward the inside of the harbor, and the inclined surfaces facing the breakwater and the mobile breaker are substantially the same. It is inclined at an angle.

  The mobile wave breaker of the present invention configured as described above can be floated as a floating body at all times because the main body is formed hollow. Moreover, the side surface of the main body portion is an inclined surface, and can be retained at the opening between the breakwaters by combining with the inclined surface of the breakwater.

  In this way, if it can be floated as a floating body at all times, monitoring is easy and there is little risk of damage due to throwing or the like, and even if it is damaged, it can be detected immediately. In the floating state, the main body is located at a shallow depth, so that even if a shell or the like is attached, it can be easily removed and maintenance is easy.

  In addition, in the event of an emergency when a storm surge or tsunami occurs, the opening between the breakwaters can be reliably closed by simply moving to the opening between the breakwaters and operating a simple moving mechanism called a water injection gate. In addition, if a propulsion device is provided, it can be moved to the opening between the breakwaters by self-navigation without using a towing ship or a crane.

  Furthermore, if the breakwater blockage structure uses such a mobile breaker, it is not necessary to perform large-scale construction simply by forming the end face of the breakwater according to the angle of the inclined surface of the movable breaker. It is economical because it is good.

It is the perspective view which showed the structure of the mobile wave breaker of embodiment of this invention. It is a figure explaining the procedure which closes the opening of a breakwater using a mobile breaker, (a) is the perspective view which showed the state before closure, (b) is the perspective view which showed the closure structure of a breakwater is there. It is a figure explaining the raising / lowering operation | movement of a movable wave-blocking body, Comprising: (a) is sectional drawing which showed the state which floated as a floating body, (b) is sectional drawing which showed the state which injects water into a main-body part and sinks. (C) is sectional drawing which showed the state raised by drainage.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a configuration of a self-propelled breakwater 1 as a mobile breaker according to the present embodiment.

  This self-propelled breakwater 1 includes a hollow main body 2 having a trapezoidal shape in plan view, rubber gaskets 3 and 3 as water stop portions attached to both side surfaces 21 and 21 of the main body 2, and the inside of the main body 2 Water injection gate part 4 for partitioning the outside water area so as to communicate or be shielded, drainage device 6 for draining water stored in the interior 2a (see FIG. 3) of the body part 2, and the body part 2 are moved to arbitrary positions And a thruster 5 as a propulsion device.

  The main body 2 has a steel structure, a concrete structure, or a hybrid structure of steel and concrete, and is formed in a box shape. The length of the main body 2 is set to be substantially the same as the width of the opening 82 between the breakwaters 8 and 8 as shown in FIG.

  Here, as shown in FIG. 2A, the breakwaters 8 and 8 are constructed in a wall shape on a mound 83 formed on the sea floor by crushed stone or the like, and the land-side port B1 and the sea-side port B2 It becomes the boundary. The ship can go back and forth between the harbor B1 and the harbor B2 through the opening 82 between the breakwaters 8 and 8.

  Further, the end face 81 facing the opening 82 of the breakwater 8 is formed into an inclined surface in such a direction that the opening 82 becomes narrower from the outside B2 side toward the inside B1 side. And the end surfaces 81 and 81 of a pair of breakwaters 8 and 8 which oppose on both sides of the opening 82 are shape | molded into the inclined surface which inclines in the mutually opposite direction, and when it sees from the port B2 side as shown to Fig.2 (a). It becomes a letter C shape.

  On the other hand, the side surface 21 of the main body portion 2 of the self-propelled breakwater 1 is formed into an inclined surface that is inclined at substantially the same angle as the end surface 81 of the breakwater 8 that faces it, as shown in FIG. Further, the side surfaces 21 and 21 on both sides of the main body portion 2 are inclined surfaces which are line symmetrical and are inclined in opposite directions. For this reason, the width of the port inner surface 22 on the B1 side in the harbor of the main body 2 is shorter than the port outer surface 23 on the B2 side outside the port. Further, the height of the main body 2 is made substantially the same as the height of the breakwaters 8 and 8 facing the opening 82.

  Then, rubber gaskets 3 and 3 are respectively attached to the side surfaces 21 and 21 on both sides of the main body 2. The rubber gasket 3 is continuously extended over the entire length of the side surface 21. The rubber gasket 3 is a member having elasticity and flexibility. When the rubber gasket 3 is pressed against the end surface 81 of the breakwater 8, the rubber gasket 3 is brought into close contact with the elastic gasket.

  As shown in FIGS. 1 and 3, the water injection gate portion 4 is provided at the lower side of the side surfaces 21, 21, the port inner surface 22, and the port outer surface 23 of the main body 2. As shown in FIG. 3, the water injection gate portion 4 includes a water injection port 41 that allows communication between the outside and the inside 2 a at the position of the main body portion 2 that is always below the water surface, and a water stop cock that can block the water injection port 41. 42 and a jack 43 for moving the stop cock 42 are mainly configured.

  The water injection port 41 is formed in a frustoconical shape where the inside 2a side is widened, and the water stopper 42 is formed by an elastic member such as rubber having an outer peripheral surface shape substantially the same as the inner peripheral surface shape of the water injection port 41. The

  The stop cock 42 is attached to the tip of the jack 43. When the jack 43 is extended, the stop cock 42 is fitted into the water inlet 41 to stop the water, and when the jack 43 is contracted, the water stopper 41 is stopped. A gap is generated between the faucet 42 and water flows from the outside into the interior 2a.

  Further, an exhaust valve 7 provided with a check valve is provided on the upper surface of the main body 2 so that water can easily flow from the water inlet 41 when the plug is opened. That is, the exhaust valve 7 is a check valve that prevents water from entering from the outside, and is opened and exhausted only when the pressure in the interior 2a is increased by water injection.

  And in order to drain the water collected in the inside 2a of the main-body part 2, the drainage device 6 is provided. The drainage device 6 is mainly configured by a submersible pump 61 installed in the vicinity of the bottom surface of the inside 2 a and a drain pipe 62 piped from the submersible pump 61 to the outside of the main body 2.

  As shown in FIGS. 1 and 2, the thruster 5 is provided at a position that is always below the surface of the self-propelled breakwater 1. The thruster 5 is a screw attached to the port inner surface 22, the port outer surface 23 and the side surfaces 21 and 21 of the main body 2.

  The self-propelled breakwater 1 can be propelled toward the port inner surface 22 or the port outer surface 23 by the thruster 5 attached to the port inner surface 22 and the port outer surface 23. Furthermore, the self-propelled breakwater 1 can be propelled in any direction by attaching the thrusters 5,.

  Next, a method and an action of making the breakwater a closed structure using the self-propelled breakwater 1 of the present embodiment will be described with reference to FIGS.

  The self-propelled breakwater 1 is always floated as a floating body in the vicinity of the opening 82 of the breakwaters 8 and 8, as shown in FIG. The self-propelled breakwater 1 is anchored at a position that does not hinder navigation, such as a ship passing through the opening 82. The berthing may be berthing by the control of the thruster 5 or berthing by anchoring (not shown) or mooring pillars (not shown).

  The state of the interior 2a of the self-propelled breakwater 1 during berthing is a hollow as shown in FIG. That is, since the water inlet 41 is closed by the water stopcock 42, seawater does not enter the interior 2 a and is floated near the water surface by the buoyancy of the main body 2.

  In this way, if it can be floated as a floating body at all times, monitoring is easy, and there is little risk of damage due to emergency dredging of the ship, and even if it is damaged, it can be detected immediately.

  Also, if the body is in a floating state, the bottom surface of the main body 2 is located at a shallow depth, so even if a shell is attached, it can be easily removed as a diving operation at a shallow position, Easy maintenance.

  Furthermore, the self-propelled breakwater 1 can be used for various purposes as a floating body at sea. For example, it can be used as a pontoon in a sea fishing park or a storage place for supplies in the event of a disaster. It can also be used as a mobile base after a disaster after functioning as a breakwater blocking structure against a tsunami.

  Then, when the opening 82 is closed by the self-propelled breakwater 1 at the time of an abnormality such as a tsunami or storm surge or a stormy weather such as a typhoon, the self-propelled breakwater 1 is moved toward the opening 82 between the breakwaters 8 and 8.

  When the self-propelled breakwater 1 is moved, if it is anchored and anchored, the thrusters 5,... The hoist winding, the propulsion and attitude control by the operation of the thruster 5, the opening and closing of the water injection gate 4 and the operation of the drainage device 6 are performed by remote control.

  In the opening 82 to which the self-propelled breakwater 1 is directed, the end faces 81 and 81 of the breakwaters 8 and 8 are inclined in such a direction that the B1 side in the harbor becomes narrower. The self-propelled breakwater 1 is formed in a trapezoidal shape in plan view that fits into the opening 82. By using such a combination of shapes, the self-propelled breakwater 1 propelled from the port B2 toward the opening 82 is fitted between the breakwaters 8 and 8 as shown in FIG. More than that, it cannot move in the B1 direction in the harbor.

  In addition, if thrusters 5,... Are continuously operated and propulsive force directed toward B1 in the port is continuously applied, the pressure acting from the B1 side in the port becomes higher than that in the B2 side outside the port as during a tsunami wave. Even if it does, self-propelled breakwater 1 does not come off from opening 82.

  Furthermore, the rubber gaskets 3 and 3 on the side surfaces 21 and 21 of the self-propelled breakwater 1 are pressed against the end surfaces 81 and 81 of the breakwaters 8 and 8 by continuously applying the propulsive force toward the B1 direction in the harbor. By becoming high, water stoppage can be improved.

  As described above, the self-propelled breakwater 1 including the thruster 5 can be moved to the opening 82 between the breakwaters 8 and 8 by self-propulsion without using a towing ship or a crane. Further, it is possible to always provide a propulsive force for opposing an external force such as water pressure.

  Then, with the self-propelled breakwater 1 disposed in the opening 82, the jacks 43 and 43 are shrunk as shown in FIG. 3 (b) to remove the stop cock 42 from the water inlet 41, and external water is supplied to the internal 2a. To flow into.

  Due to the inflow of water, the air in the interior 2a is discharged from the exhaust valve 7, the inner water level W3 rises, the buoyancy of the main body 2 decreases, and the self-propelled breakwater 1 begins to sink. This sedimentation continues until the bottom surface of the main body 2 is landed on the upper surface of the mound 83 of the opening 82.

  In such an emergency when a storm surge or a tsunami occurs, the self-propelled breakwater 1 is moved to the opening 82 between the breakwaters 8 and 8, and a simple structure movable mechanism called the water injection gate portion 4 is operated. The opening 82 between the breakwaters 8 and 8 can be closed reliably.

  Moreover, if the side surfaces 21 and 21 on both sides of the main body 2 are inclined surfaces that are inclined in opposite directions, the force is evenly distributed on both sides of the main body 2, and a large force is generated by a tsunami or the like. Even if acts, the breakwaters 8 and 8 can be stably closed.

  Furthermore, if the breakwaters 8 and 8 can be closed in an emergency, the harbor water level W1 in the harbor B1 can be maintained lower than the harbor water level W2 in the harbor B2 as shown in FIG. 2 (b). it can.

  And if the water level W2 outside a port becomes higher than the water level W1 in a port, the pressing force with respect to the breakwaters 8 and 8 of the self-propelled breakwater 1 will increase, and stability will become high. Furthermore, by suppressing the rise of the water level W1 in the harbor, damage such as damage to the ship in the harbor B1 and inundation of roads and villages near the harbor can be prevented.

  Then, when the storm surge or tsunami has passed and the emergency has ended, as shown in FIG. 3 (c), the jacks 43, 43 are extended and the water inlet 41 is closed with the stop cock 42, and then the submersible pump 61 is turned on. Operate.

  Then, the water in the inside 2a is sucked up and discharged from the drain pipe 62 to the outside, and the internal water level W3 is lowered. As a result, the buoyancy of the main body 2 is restored, and the self-propelled breakwater 1 can rise to near the original water surface position. Further, by moving the levitated self-propelled breakwater 1 to the normal position by the thrusters 5,..., The blockage between the breakwaters 8, 8 can be quickly released.

  Thus, if the breakwater blockage structure using the self-propelled breakwater 1 of the present embodiment, the self-propelled breakwater 1 is manufactured, and the end surfaces 81 and 81 of the breakwaters 8 and 8 are connected to the side surface of the self-propelled breakwater 1. It is only necessary to mold according to the inclination angle of 21 and 21.

  For this reason, it is not necessary to perform a large-scale construction such as excavating the mound 83 and attaching a movable mechanism to the seabed by diving work, and it is easy to add an inclined end face 81 to the existing breakwater. Can be applied to.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, although the self-propelled breakwater 1 has been described in the above-described embodiment, the present invention is not limited to this, and a mobile breaker that is moved by a towed ship or a crane may be used.

  Further, in order to keep the self-propelled breakwater 1 at the position of the opening 82, a structure connected to a mooring column may be used. Furthermore, a projecting portion constituted by a jack or the like that can be extended toward the end surface 81 of the breakwater 8 is provided on the side surface 21 of the main body 2, and self-cruising between the breakwaters 8 and 8 by projecting the projecting portion. The type breakwater 1 can also be fixed.

  Moreover, in the said embodiment, although the both sides | surfaces 21 and 21 of the main-body part 2 were made into the inclined surface which becomes line symmetrical, it is not limited to this, The angle of a side surface may differ on right and left. .

  Furthermore, in the said embodiment, although the structure which attaches the one rubber gasket 3 to the one side surface 21 was demonstrated, it is not limited to this, A some water stop part is provided at intervals in the inside and outside direction of a port. Can be provided.

  Moreover, in the said embodiment, although the thruster 5 was provided in both the port inner surface 22 and the port outer surface 23, it is not limited to this and any one surface may be sufficient. The propulsion direction can also be changed by changing the rotation direction of the thruster 5 provided on one surface.

1 Self-propelled breakwater (mobile breaker)
2 Body 2a Inside 21 Side 3 Rubber gasket (water stop)
4 Water injection gate 5 Thruster (propulsion device)
6 Drainage device 8 Breakwater 81 End face 82 Opening B1 Inside the harbor B2 Outside the harbor

Claims (3)

A mobile wave breaker for closing an opening between breakwaters,
A hollow main body portion formed to have the same length as the width of the opening, and a side surface facing the end face of the breakwater facing the opening is formed into an inclined surface,
A flexible or elastic water stop portion continuously extending in the height direction on the side surface of the main body portion;
A water injection gate part for partitioning the inside of the main body part and an external water area so as to communicate or shield;
A mobile wave breaker comprising a drainage device for draining water stored in the main body.   The mobile wave breaker according to claim 1, further comprising a propulsion device that moves the main body to an arbitrary position.   The mobile wave breaker according to claim 1 or 2, and a pair of breakwaters formed with end faces to which the water blocking portions provided on both sides of the wave breaker can be in close contact, and the inclined surface of the mobile wave breaker The end face of the breakwater facing the slope is an inclined face in such a direction that the opening becomes narrower toward the inside of the port, and the inclined faces facing the breakwater and the mobile breaker are inclined at substantially the same angle. Breakwater blockage structure characterized by