JP2009299427A - Derricking gate-type breakwater and its rising method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a derricking gate-type breakwater capable of rising in a short period of time, and a rising method therefor. <P>SOLUTION: This luffing gate-type breakwater 11 has a door body 12 raised by buoyancy obtained by the air in an air chamber 12b. The luffing gate-type breakwater 11 comprises: a turning guide 17 which is installed in a section, facing the backside 12c of the door body 12 in a storage state, of a storage section 14 for housing the door body 12 in water; an mooring rope 18, one end side of which is attached to the backside 12c of the door body 12 and the other end side of which is pulled out onto a water surface via the turning guide 17; a fixing device 19 which is provided on the other end side of the mooring rope 18, so as to fix the mooring rope 18 pulled out onto the water surface; and a release device 20 which is similarly provided on the other end side of the mooring rope 18, so as to release the mooring of the mooring rope 18 when necessary. <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 raising 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). In this undulating gate type breakwater, the door body 1 is levitated by draining the seawater in the air chamber 1a while supplying air to the air chamber 1a of the door body 1. Therefore, as shown in FIG. In addition, a pressure accumulating pump 2a and a compressor 2b, which are air supply devices 2 for supplying and draining air, are required. In FIG. 5, 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 in the event of 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 impossible to detect an abnormality in which a hole is opened 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 maintenance such as a floating operation or a dredging, and the maintenance burden is large.

  Also, for example, when a breakwater is raised when a tsunami warning is issued in the event of an earthquake, the air valve is opened and the air chamber is drained and supplied based on the ascent command, so the breakwater can be raised. It takes time and may not be in time to block the tsunami intrusion.

  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 stands by buoyancy obtained by the air in the air chamber,
A turning guide installed in a portion facing the back surface of the door body in the storage state in the storage portion for storing the door body in water,
One end side is attached to the back surface of the door body, and the other end side is a mooring rope drawn out on the water surface via 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;
Also provided on the other end side of the mooring rope, a release device for releasing the mooring of the mooring rope when necessary,
The main feature is that it has

  In the undulating gate type breakwater of the present invention, the door body is erected only by releasing the mooring of the mooring rope because the door body is moored so that the door body does not stand up in a state where air is accumulated in the air chamber. be able to.

  In the undulating gate type breakwater of the present invention, when an air supply device for supplying compressed air to the air chamber of the door body and a device for monitoring the tension acting on the mooring rope on the other end side of the mooring rope are provided, Since the door can be erected simply by releasing the rope, the urgent need for air supply and exhaust becomes unnecessary. Therefore, the duplication of the air supply device and the backup function can be omitted, the device can be simplified, and the maintenance burden is reduced.

  In the undulating gate type breakwater of the present invention, if the mooring rope is released by operating the release device, the door body that has been lifted to the normal water level by buoyancy causes the door body to stand upright by the force of the push wave. I can do it. This is the method for raising the undulating gate type breakwater of the present invention.

  In this case, for example, even if a tsunami that is repeatedly pushed and pulled occurs, the door body repeatedly stands up and falls by the pushed and pulled waves to block the intrusion of the tsunami.

  In the present invention, since the door body is moored by the mooring rope so that the air does not stand in a state where air is stored in the air chamber, the door body can be erected only by releasing the mooring of the mooring rope. 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.

  In addition, if an air supply device for the air chamber of the door body and a device for monitoring the tension acting on the mooring rope are further provided, there is no need for urgent air supply / exhaust. The function can be omitted, the apparatus 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 views 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 FIG. 4 shows the operation of the undulating gate type breakwater of the present invention. It is the schematic to explain.

  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. 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. In addition, 16c shows an air supply valve and 16d shows an air supply pipe.

  The present invention is opposed to, for example, the back surface 12c of the door body 12 in the storage state shown in FIG. 2 (b) in the storage portion 14 for storing the door body 12 in water of the undulating gate type breakwater 11 configured as described above. A turning guide 17 is installed in the part.

  And, via this turning guide 17, one end side is attached to the back surface 12 c of the door body 12, and the other end side of the mooring rope 18 is pulled out on the water surface. A release device 20 is provided for releasing the mooring of the mooring rope 18 when necessary. In addition, even when one mooring rope 18 is cut, adjacent door body blocks are connected by a rope so that the door body 12 does not rise by mistake.

  In the example of FIGS. 1 to 3, the release device 20 is provided with a main cutting device 20 a and a sub-cutting device 20 b for the mooring rope 18. These cutting devices 20a and 20b may use a melt cutting device when, for example, a polyethylene fiber rope is used as the mooring rope 18.

  Moreover, in the example of FIGS. 1-3, the apparatus 21 which monitors the tension | tensile_strength which acts on the mooring rope 18 in the other end side of the mooring rope 18, and the door body in the floating state shown to Fig.2 (a) at the time of a pulling wave A stopper device 22 is provided to support the door body 12 when 12 falls to a predetermined angle.

  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 adapted to swing 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.

(Always: See Fig. 4 (a))
In a state where the door body 12 is landed at the storage position of the storage portion 14, the terminal on the other end side of the mooring rope 18 is attached to the fixing device 19 and held so that the door body 12 does not float.

  While monitoring the tension of the mooring rope 18 with the monitoring device 21, the air supply pipe 16d arranged so that the air supply port comes directly under the opening of the air chamber 12b until the buoyancy necessary for the rising of the door body 12 is obtained. Compressed air is supplied into the air chamber 12 via In the state where the supply of compressed air is completed, the air chamber 12b has been filled with air necessary for the rising of the door body 12 and is moored by the mooring rope 18 so as not to float.

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

  Everyday, the tension of the mooring rope 18 and the inclination angle of the door body 12 are constantly monitored. When the buoyancy of the door body 12 is reduced due to deposits or the like, a necessary amount of air is supplied. In addition, when the tension of the mooring rope 18 is not recovered only by air supply, maintenance such as a floating operation or a dredging is performed.

  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.

(At the time of floating operation of the door body 12: see FIG. 4B)
For example, when a tsunami warning is issued due to the occurrence of an earthquake and a levitation command is issued, the main cutting device 20a and the sub-cutting device 20b, which are release devices 20, are operated to cut the mooring rope 18. By this cutting, the mooring rope 18 is pulled out by the buoyancy generated in the air chamber 12b by the compressed air supplied in advance, and the door body 12 rises to the normal water level.

  In addition, when the stopper apparatus 22 shown in FIG. 1 is provided, the mooring rope 23b is drawn 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.

(At the time of lodging operation of the door body 12: see FIG. 4C)
The exhaust valve 12d provided at the upper end portion of the door body 12 is opened to exhaust the air in the air chamber 12b, and seawater is put into the air chamber 12b so that 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.

  After the lodging is completed, the exhaust valve 12d is closed, the cut mooring rope 18 is collected, and the mooring rope 18 in the cutting section is replaced. After the work is completed, the process returns to the normal work.

  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 mooring of the mooring rope 18, so that the door body 12 can be erected in a short time. it can.

  When the air supply device 16 for the air chamber 12b and the monitoring device 21 for monitoring the tension of the mooring rope 18 are further provided as in the present invention example, the urgency of the air supply becomes unnecessary. The duplication of 16 and the backup function can be omitted, the apparatus can be simplified, and the maintenance burden 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-described invention example, the air supply device 16 and the monitoring device 21 are provided. However, if the air chamber 12a is prefilled with air sufficient to obtain the necessary buoyancy, both the devices 16 and 21 are It is not necessary.

  Moreover, although the two cutting devices of the main cutting device 20a and the sub cutting device 20b are provided as the releasing device 20 to ensure reliability, it is not always necessary to provide two. Furthermore, as long as the anchoring rope 18 can be released, not only the cutting device but also a device that releases the fixing device 19 may be used.

  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 operation | movement of the undulation gate type breakwater of this invention, (a) at the time of storing, (b) at the time of levitation operation, (c) shows the time of overturning. It is a figure similar to FIG. 4 explaining the operation | movement of the conventional undulation gate type breakwater.

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 Turning guide 18 Mooring rope 19 Fixing device 20 Release device

Claims (3)

In the undulating gate type breakwater where the door body stands by buoyancy obtained by the air in the air chamber,
A turning guide installed in a portion facing the back surface of the door body in the storage state in the storage portion for storing the door body in water,
One end side is attached to the back surface of the door body, and the other end side is a mooring rope drawn out on the water surface via 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;
Also provided on the other end side of the mooring rope, a release device for releasing the mooring of the mooring rope when necessary,
A undulating gate type breakwater characterized by having. An air supply device for supplying compressed air to the air chamber of the door body;
The undulating gate type breakwater according to claim 1, further comprising a device for monitoring tension acting on the mooring rope on the other end side of the mooring rope. A method of raising the undulating gate breakwater according to claim 1 or 2,
A method for raising a undulating gate type breakwater, wherein the release device is operated to release the mooring of the mooring rope, whereby the door body is lifted by buoyancy, and thereafter the door body is raised by the force of a push wave.

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