JP2010101097A - Flap gate-type breakwater, and method for raising, bringing-down-and-mooring and mooring the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flap gate-type breakwater installed as a countermeasures against a tsunami and a high tide in a harbor, and a method for raising, bringing down, and mooring the breakwater which can raise the breakwater in a short period of time. <P>SOLUTION: The flap gate-type breakwater 11 is raised by the buoyancy of an air chamber 12b. The flap gate-type breakwater includes: a turning pulley 18 which is in a state of being housed in an underwater storage portion 14, and installed in a portion facing the backside 12c of a door body 12 having a plurality of sets of door body blocks B juxtaposed in a width direction; a hook 19 which is installed in a position facing a gate mooring portion 17 mounted to the backside 12c of the door body 12 of the storage portion 14 the intermediate portion of which has a rotational supporting point 19a; a mooring rope 20 the one end side of which is attached to a lower portion of the hook 19, and the other end side of which is pulled out to a water surface via the turning pulley 18; and a fixing device 21 which is provided at the other end side of the mooring rope 20 so as to fix the mooring rope 20 pulled out to the water surface. In the hook 19, two claw-like protrusions 19b and 19c engaged with the gate mooring portion 17 are provided at an upper side, and a weight 19d is provided in a lower portion. Since the door body can be raised by disengaging the claw-like protrusion, the intrusion of the tsunami can be effectively blocked. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a undulating gate type breakwater installed in a harbor as a countermeasure against, for example, a tsunami and a storm surge, and a method for standing, lodging, mooring and mooring the breakwater.

As the above-described undulating gate type breakwater, there is one that undulates the door body by buoyancy (for example, Patent Document 1). Since this undulating gate type breakwater supplies air to the air chamber 1a of the door body 1 and drains the seawater in the air chamber 1a, the door body 1 is lifted. Therefore, as shown in FIG. 7, the air chamber 1a In addition, an air supply device 2 (pressure accumulation tank 2a and compressor 2b) for supplying and discharging air is required. In FIG. 7, 2c denotes an air supply valve, and 2d denotes an exhaust valve.
JP 2003-227125 A

  However, in the case of the undulating gate breakwater, it is necessary to always store the compressed air in the pressure accumulating tank so that the necessary compressed air can be supplied even during a power failure. Also, the air chamber of the door body is filled with seawater, and because it is landing at the storage position due to the weight of the door body, the pressure of the pressure accumulator tank, the overturning moment of the door body (weight of the tip of the door body) and It is necessary to constantly monitor the tilt angle. However, even in this case, it is not possible to detect an abnormality that causes a hole in the air chamber due to corrosion or the like. Furthermore, when the weight of the door body increases due to deposits or the like, it is necessary to perform a maintenance operation such as a floating operation or a dredging.

  Also, for example, when a tsunami warning is issued in the event of an earthquake and the breakwater is raised, the air valve is opened based on the ascent command and the air chamber is drained and supplied, so it takes time to stand up the breakwater. In some cases, the tsunami intrusion cannot be cut off in time.

  The problem to be solved by the present invention is that in the case of the undulating gate type breakwater that floats the door body by draining the water in the buoyancy chamber while supplying air to the buoyancy chamber of the door body, the time required for standing up is long. It is that.

The relief gate breakwater of the present invention is
To enable standing up in a short time,
In the undulating gate type breakwater where the door body rises due to the buoyancy of the air chamber,
A door body in which a plurality of door body blocks are arranged in the width direction;
A turning guide installed in a portion opposite to the back surface of the door body in the storage state in the storage section for storing the door body in water,
A hook having a pivotal fulcrum at an intermediate part, installed at a position opposite to the gate mooring part attached to the back surface of the door body in the storage part;
One end side is attached to the lower part of the hook, and the other end side is a mooring rope drawn out on the water surface through the turning guide,
A fixing device that is provided on the other end of the mooring rope and fixes the mooring rope drawn on the water surface;
The hook is characterized in that it has two claw-like projections engaged with the gate mooring portion on the upper side and a weight provided on the lower portion.

  The undulating gate type breakwater of the present invention has a door body that can store air in an air chamber and can stand up by buoyancy, and a gate mooring part that is attached to the back surface of the door body is engaged with a claw-like protrusion formed on the hook. Since the door body is restrained not to stand, the door body can be erected only by releasing the engagement.

  That is, in the undulating gate type breakwater of the present invention, the upper claw-like protrusion formed on the hook is engaged with the through hole provided in the gate mooring portion, and air is stored in the air chamber to obtain buoyancy. The tension of the mooring rope is released from the state in which the door body is retracted by applying tension to the mooring rope while maintaining the state.

  When the tension of the mooring rope is released, the hook rotates due to the gravity of the weight, the engagement of the upper claw-like projections with the through-hole portion is released, and the door body rises. This is the method for raising the undulating gate type breakwater of the present invention.

  If seawater is supplied while exhausting the air in the air chamber from the standing state, the door body will fall down. Due to the fall of the door body, the lower end of the gate mooring part pushes the lower claw-like protrusion to rotate the hook, and the upper claw-like protrusion is engaged with the through-hole part of the gate mooring part. Thereafter, after tension is applied to the mooring rope, air is supplied while the seawater in the air chamber is drained to maintain the door in the retracted state. This is the method for lodging and mooring the undulating gate type breakwater of the present invention. According to the present invention, since the door body can be reliably held in the lying state, it is not necessary for the diver to check the holding state in water.

  When the undulating gate breakwater of the present invention is further provided with a load cell for measuring tension acting on the mooring rope and an air supply device for supplying air to the air chamber, the air is applied so that the tension acting on the mooring rope is constant. If the amount of air in the room is adjusted, the moored state in which the preparation for raising the door body is completed can be maintained.

  In the present invention, the upper side and the lower side of the hook are the upper side in the vertical direction and the lower side in the vertical direction are the lower side in a state in which the hook is supported so as to be freely rotatable at the pivot point.

  In the present invention, since the door body does not stand up by engaging the claw-like projections formed on the hook with the gate mooring portion attached to the back surface of the door body with air stored in the air chamber. The door can be erected only by releasing the joint. In particular, when an earthquake occurs, a door body that has floated to a normal water level due to buoyancy can stand the door body vertically by the force of a tsunami pushing wave, effectively blocking the intrusion of a tsunami.

  If a load cell and an air supply device are further provided, the tension applied to the mooring rope in the retracted state is measured by the load cell, and the air volume in the air chamber is adjusted so that the measured tension is constant. It is possible to maintain the state where preparation for standing up is completed. Therefore, urgent need is not required for supply and exhaust, the dual supply and backup functions of the air supply device can be omitted, the device can be simplified, and the maintenance burden is reduced.

The best mode as well as various modes for carrying out the present invention will be described below in detail with reference to the accompanying drawings.
1 and 2 are schematic diagrams for explaining various states of the undulating gate type breakwater of the present invention, FIG. 3 is a plan view of the undulating gate type breakwater of the present invention, and FIGS. 4 to 6 are undulated gate type breakwaters of the present invention. It is the schematic explaining the operation | movement of a hook.

  1 to 3, reference numeral 11 denotes a undulating gate breakwater. For example, a door body 12 and a plurality of tensions provided outside the harbor R so that the door body 12 does not fall when the door body 12 stands. The configuration includes a rod 13.

  In the example shown in FIGS. 1 to 3, the door body 12 includes a plurality of door body blocks B arranged in parallel in the width direction, and the adjacent door body blocks B are connected to each other by a rope. The door body 12 pivotally supports the rotating shaft 12a by pivotally supporting the rotating shaft 12a on the base end side, for example, on a base 14a of a storage portion 14 provided at the bottom of the harbor R by a bearing 15. As shown, the door body 12 undulates.

  Further, the tension rod 13 is formed to be bent in two at an intermediate connecting portion 13a, for example. The one end portion 13b positioned on the upper end side when the door body 12 is raised is located at the upper portion of the door body 12, and the other end portion 13c located on the lower end side when the door body 12 is raised is the rotation on the side where the door body 12 is lying down. Each is pivotally supported so as to be freely rotatable at a position separated from the shaft 12a by a predetermined distance.

  For example, an air chamber 12b is provided on the top side of the door body 12, and is supplied to the air chamber 12b by a receiver tank 16a and a compressor 16b, which are air supply devices 16, so that the door body 12 is required to float. It is configured to obtain buoyancy. Reference numeral 16c denotes an air supply pipe.

  In the present invention, for example, a gate mooring portion 17 provided with a through-hole portion 17a is attached to the back surface of the door body 12 of the undulating gate type breakwater 11 having the above-described configuration. This gate mooring part 17 does not necessarily need to be attached to all door block B.

  On the other hand, in the storage unit 14 for storing the door body 12 in water, the portion facing the rear surface 12c of the door body 12 in the storage state shown in FIG. 2B is shown in FIG. 4B and FIG. Thus, for example, a turning pulley 18 is installed as a turning guide.

  In addition, a hook 19 is installed at a position facing the gate mooring portion 17 attached to the back surface of the door body 12 in the storage portion 14. The hook 19 has a pivot fulcrum 19a at the center, two claw-like projections 19b and 19c that engage with the gate anchoring portion 17 on the upper side, and a weight 19d on the lower side. Although not shown, the turning pulley 18 and the hook 19 are each supported by an attachment member provided in the storage portion so as to be freely rotatable.

  Then, the other end side of the mooring rope 20 having one end side attached to the lower portion of the hook 19 is pulled out onto the water surface via the turning pulley 18 and fixed by the fixing device 21.

  In the example of FIGS. 1 to 3, a stopper device 22 that supports the door body 12 is provided when the door body 12 in the floating state shown in FIG. . The stopper device 22 is pivotally supported on the proximal end side so as to be rotatable slightly on the side of the rotating shaft 12a of the door body 12 from the other end portion 13c of the tension rod 13, and the distal end side is supported by its own buoyancy around the proximal end. It has a support rod 22a that swings upright.

  When the support rod 22a stands up to the position positioned by the guide 22b, the base end of the fixed rod 22c whose tip is pivotally supported in the middle of the support rod 22a as it stands is the base end side of the support rod 22a. Come on.

  When the support rod 22a rises to the positioning position by the guide 22b, the base end of the fixed rod 22c engages with the fixed hook 22d that falls from the standing state together with the support rod 22a. To prevent.

  The fixed hook 22d is erected to release the engagement of the base end of the fixed rod 22c when the support rod 22a is lying down. This standing hook and descent action of the fixed hook 22d is, for example, a moving pulley in which one end side is fixed to the support rod 22a and the other end of the mooring rope 23a having the intermediate portion wound around the base end side of the fixed hook 22d is fixed. The wound mooring rope 23b is fed out and wound up by the winch 24 following the undulation operation of the support rod 22a.

  The undulating gate type breakwater 11 of the present invention having the above-described configuration prevents the tsunami from entering the harbor R by operating as described below, for example, when an earthquake occurs and a tsunami warning is issued. To do.

[At storage (mooring)]
In the state shown in FIG. 2B in which the door body 12 has landed at the storage position of the storage portion 14, the upper claw-shaped protrusion 19 b is formed in the through hole portion 17 a of the gate mooring portion 17 as shown in FIG. 4. Is engaged. In order to enable standing up in a short time, air is supplied to the air chamber 12b of the door body 12 in this state until the buoyancy necessary for the levitation of the door body 12 is obtained. The supply of compressed air to the air chamber 12b is performed through an air supply pipe 16c arranged so that the air supply port comes directly under the opening of the air chamber 12b, for example.

  Further, a tension is applied to the mooring rope 20 so that the engaged state is not released, and a rotational force is applied in a direction in which the claw-shaped protrusion 19b engages with the through-hole portion 17a. At this time, if the distance b from the rotation fulcrum 19a to the support point of the mooring rope 20 is made longer than the distance a from the rotation fulcrum 19a of the hook 19 to the mooring support point of the door body 12, the mooring rope 20 It is possible to reduce the tension acting on the. By reducing the tension, it is possible to reduce the diameter of the mooring rope 20 and the turning pulley 18 to be used, and a significant cost reduction can be expected.

  At this time, a load cell for measuring the tension acting on the mooring rope 20 is further provided, and the tension is measured on a daily basis. When the buoyancy of the door body 12 is reduced by deposits or the like and the tension is reduced, the air body 12b is replenished with a necessary amount of air and adjusted so that the measured tension is constant. It is possible to maintain a state where 12 preparations for standing are completed. At this time, if the tension of the mooring rope 20 is not recovered by air replenishment alone, maintenance such as levitation operation or dredging is performed.

  When the stopper device 22 shown in FIGS. 1 and 2 is provided, the support rod 22a is pressed down by the door body 12, and in this state, the winch 24 that winds and feeds the mooring rope 23b. Release the brake.

  When the stopper device 22 is provided, the inclination of the support rod 22a is confirmed, and the operation of the stopper device 22 is confirmed using the space on the back surface side of the door body 12 at the time of confirmation.

[When the door 12 is raised (standing)]
For example, when a tsunami warning is issued due to the occurrence of an earthquake and a levitation command is issued, the fixing device 21 is loosened to release the tension of the mooring rope 20. Due to the release of the tension, the hook 19 rotates from the state of FIG. 5A through the states of FIGS. 5B to 5G to the state of FIG. The engagement of the projection 19b with the through hole 17a is released. When the engagement of the upper claw-like projection 19b with the through-hole portion 17a is released, the door body 12 rises to the normal water level due to the buoyancy of the air chamber 12b by the compressed air supplied in advance.

  When the stopper device 22 shown in FIGS. 1 and 2 is provided, the mooring rope 23b is fed out in conjunction with the rising of the door body 12, and the support rod 22a is lifted. The support rod 22a that has floated is positioned by the guide 22b and is prevented from falling by the fixing hook 22d.

  When a tsunami comes from the outside of the port R, the door body 12 that has been lifted to the normal water level by buoyancy is erected vertically as shown in FIG. Intrusion into the harbor R is prevented.

  On the other hand, even if the pulling wave comes and the door body 12 tries to fall down, when the stopper device 22 shown in FIG. 1 is provided, if the door body 12 falls down to a predetermined angle, as shown in FIG. And supported by the support rod 22a.

[When the door 12 is laid down]
An exhaust valve (not shown) provided at the upper end of the door body 12 is opened, and while the air in the air chamber 12b is exhausted, seawater is put into the air chamber 12b and the door body 12 is laid down. When the stopper device 22 shown in FIG. 1 is provided, the winch 24 is operated in conjunction with the fall of the door body 12 to wind the mooring rope 23b, and the support rod 22a is lowered.

  Due to the fall of the door body 12, the lower end of the gate anchoring portion 17 pushes the lower claw-like projection 19 c to rotate the hook 17 as shown in FIG. 6, and the upper claw-like projection 19 b is connected to the through-hole portion of the gate anchoring portion 17. It is made to engage with 17a (state of FIG.4 (b)).

  Thereafter, tension is applied to the mooring rope 20 to drain the seawater in the air chamber 12b, and then the exhaust valve is closed. Subsequently, air is supplied to the air chamber through the air supply pipe and the air supply port, and the door body 12 is maintained in the lying state. After the work is completed, the process returns to the work at the time of storing.

  As described above, in the undulating gate type breakwater 11 of the present invention, the door body 12 can be erected only by releasing the engagement of the hook 19 engaged with the gate mooring portion 17. 12 can stand up in a short time.

  Further, when a load cell for monitoring the tension of the mooring rope 20 is further provided as in the present invention example, the urgency of the supply air becomes unnecessary, so that the dual supply and backup functions of the supply device 16 can be omitted. Can be simplified and the burden of maintenance is reduced.

  The present invention is not limited to the above examples, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, in the above invention example, the air supply device 16 and the load cell are provided. However, if the air chamber 12a is prefilled with air sufficient to obtain the required buoyancy, the air supply device 16 and the load cell are not provided. May be.

  The present invention can be installed not only in harbors but also in rivers as a countermeasure against tsunamis and storm surges. In rivers and ports where ships navigate, it is also possible to provide a pit to prevent the water depth from becoming shallow and to place a base in this pit.

It is the schematic explaining the state stood up at the time of the pushing of the undulating gate type breakwater of this invention. (A) is the schematic explaining the state at the time of the drawing of the undulating gate type breakwater of this invention, (b) is the schematic explaining the state at the time of storing similarly. It is a top view of the undulating gate type breakwater of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic explaining the engagement state of the gate mooring part and hook at the time of the undulation gate type breakwater of this invention lying down, (a) is a front view, (b) is a side view. (A)-(h) is the schematic explaining in order the engagement state of a gate mooring part and a hook at the time of the rising gate type breakwater of this invention standing up from the time of a fall. It is a side view explaining the engagement state of the gate mooring part and hook just before the undulating gate type breakwater of this invention falls down. It is the schematic explaining operation | movement of the conventional undulating gate type breakwater, (a) is a figure at the time of storing, (b) at the time of floating operation, (c) is a figure which shows at the time of a fall.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Undulating gate type breakwater 12 Door body 12a Rotating shaft 12b Air chamber 12c Back surface 14 Storage part 15 Bearing 16 Air supply device 17 Gate mooring part 17a Through-hole part 18 Turning pulley 19 Hook 19a Rotation fulcrum 19b, 19c Claw-shaped protrusion 19d Weight 20 Mooring rope 21 Fixing device

Claims (5)

In the undulating gate type breakwater where the door body rises due to the buoyancy of the air chamber,
A door body in which a plurality of door body blocks are arranged in the width direction;
A turning guide installed in a portion opposite to the back surface of the door body in the storage state in the storage section for storing the door body in water,
A hook having a pivotal fulcrum at an intermediate part, installed at a position opposite to the gate mooring part attached to the back surface of the door body in the storage part;
One end side is attached to the lower part of the hook, and the other end side is a mooring rope drawn out on the water surface through the turning guide,
A fixing device that is provided on the other end of the mooring rope and fixes the mooring rope drawn on the water surface;
The undulating gate type breakwater is characterized in that the hook has two claw-like protrusions that engage with the gate mooring portion on the upper side, and a weight is provided on the lower portion.   The undulating gate breakwater according to claim 1, further comprising a load cell for measuring a tension acting on the mooring rope and an air supply device for supplying air to the air chamber.   Engage the upper claw-like projection with a through-hole provided in the gate mooring portion, and retain tension in the mooring rope while keeping air in the air chamber and the door body maintaining buoyancy. From the state in which the door body is retracted, the tension of the mooring rope is released, the hook is rotated by the gravity of the weight, and the engagement of the claw-like projections with the through-hole portion is released. The rising method of the undulating gate type breakwater according to claim 1, wherein the door body is erected.   By supplying seawater while exhausting the air in the air chamber, the door body is laid down from the standing state, and the lower end of the gate mooring portion pushes the lower claw-like projection by the fall of the door body, and the hook is Rotate and engage the upper claw-like projections with the through-hole portion of the gate mooring portion, and then apply air to the door body while draining seawater in the air chamber after applying tension to the mooring rope. The method for lodging and mooring the undulating gate type breakwater according to claim 1, wherein the storage state is maintained.   The upper claw-like projection is engaged with the through-hole portion of the gate mooring portion, and the mooring rope is tensioned while keeping the air body in the air chamber and keeping the door body buoyant. In a state where the door body is stored, the tension acting on the mooring rope is measured by the load cell, and the amount of air supplied from the air supply device to the air chamber is adjusted so that the measured tension is constant. The mooring method of the undulating gate type breakwater according to claim 2.

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