JP2003138549A - Mobile tide prevention device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile tide prevention device capable of coping with a large storm wave, dispensing with a wide space conventionally, and smoothly moving a tide embankment. SOLUTION: This mobile tide prevention device is provided with a gravity type tide embankment 20 having buoyancy adjustment means floating to the water surface and grounding to the water bottom and becoming the tide embankment by being grounded on a prescribed tide embankment installation part 11a. One end side of the tide embankment body 20 is turned around and vertically movably supported to a vertical shaft 13 erected in an immobile position such as a water bottom foundation or a wharf so as to reciprocate the tide embankment body 20 between a retreat position 11 and the tide embankment body installation part 11a into a fan shape with its 20 floated to the water surface, and the tide embankment body 20 is grounded in the prescribed installation position of the tide embankment body installation part 11a so as to be the tide embankment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile tide apparatus that is installed at the mouth of a river facing the open ocean or at the entrance / exit of a harbor and that can install a seawall only when high waves occur.

[0002]

2. Description of the Related Art Conventionally, there has been a sluice-shaped tide device provided with a movable weir provided with a weir plate that moves up and down at the estuary facing the open ocean, and the weir plate is adapted according to the time of high waves. There is a type of tide lock device that can be lowered, but this type of sluice-type tide device that moves up and down has a limit in size due to its mechanism, and in the case of blocking the route that a large ship can navigate, Cannot be installed.

[0003] Conventionally, as a large-scale mobile tide apparatus, which is usually designed to open the entire waterway so that a large ship can navigate and to close the entire waterway in an emergency,
As shown in FIG. 5, vertical support shafts 2 and 2 were installed on the opposite shores 1 and 1, and an arch-shaped dam plate 4 was supported by interposing a fan-shaped frame 3 which required each of the columns 2. A seawall 5 is installed, and on opposite banks 1, 1 are provided with evacuation spaces 6 in which the entire fan-shaped seawater embankment 5 can be evacuated. Normally, the tide embankment 5 is housed in the evacuation space 6. If necessary, the support shafts 2 are rotated in a fan-shaped direction to move each dam plate 4 to the center of the water channel, and the tips thereof are placed in abutment with each other to shield the water channel. Is being developed. The conventional seawall 5 used here is composed of a steel framework 3 and a steel dam plate 4,
Against the high waves coming in, the supporting shafts 2, 2 installed on both banks 1, 1 are used to counter the tide embankment support force.

[0004]

In the above-mentioned conventional mobile tide embankment device, when a high wave invades, the stress concentrates on the support shaft, and there is a problem that a large wave force cannot be countered. In addition, since the overall shape of the seawall is fan-shaped, and the evacuation space for accommodating each of them must be installed on the opposite bank, the wider the evacuation space should be kept as the opening of the waterway to be blocked becomes wider. There was a problem that the dead space at the port restricted the installation of other port equipment, in particular.

In view of such a conventional problem, the present invention is a mobile type that can cope with large high waves, does not require a wide space as in the conventional case, and can smoothly move a seawall. The purpose was to provide a sea tide device.

[0006]

The features of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose are as follows.
It has a buoyancy adjusting means for floating on the water surface and bottoming operation on the bottom of the water, and is equipped with a gravity-type tide embankment body that becomes a tide embankment by landing on a predetermined tide embankment installation part. One end of the levee body is supported so that it can rotate and move up and down around a vertical axis that is erected on an immovable part such as a water bottom foundation or quay, and the levee body is levitated above the water surface and the tide is protected from the evacuation position. A tide embankment is formed by allowing reciprocating movement between the embankment installation portions in a fan-shaped direction and by bottoming the tide embankment body at a predetermined installation position of the tide embankment installation portion.

[0007] The seawall installations are located between opposite banks, and seawalls are installed on both banks so as to be rotatable about the vertical axis, and the seawalls are directed toward the center of both banks. You may make it move and make it abut on the bottom, and make the seawall installation part the opposite bank between mutually facing, and install the seawall body rotatably centering on a vertical axis on one side of this seashore. A ridge body tip joint portion to which the tip portion of the tide body is joined is installed on the other side, and the tide body body is moved from one side of the opposite bank toward the other side, and the tip is attached to the ridge body tip joint portion. You may make it join and make it bottom.

Further, the seawall is constructed by a hollow concrete box body whose interior is divided by a large number of partition walls, and each of the compartments is a ballast tank capable of pouring and draining,
It is preferable that each ballast tank is equipped with a pouring / draining pump so that the seawall is floated / bottomed by pouring water into the ballast tank. It is preferable to provide a thruster that can freely eject running water.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an outline of an example of a mobile tide apparatus according to the present invention. In the figure, reference numerals 10 and 10 denote breakwaters arranged opposite to each other, which constitute a bay mouth of a harbor, for example. The space is a waterway closed by the seawall according to the present invention.

At the bottom of this waterway, a seabed foundation 11a for seawater bottoming for landing the seawall body is constructed in the width direction of the waterway, and the seawater is formed outside the tip of both breakwaters 10 (outside sea side). The water bottom foundation 11b for evacuation bottom that bottoms the levee body that has evacuated the levee body with the water channel open
It is constructed from the tip of the breakwater toward the open sea. Each of these foundations 11a and 11b is made of rubble mound or concrete.

At a position outside the tip of each breakwater 10, a column 13 is erected from a column foundation 12 formed on the bottom of the water. A base end portion of the seawall 20 is pivotally supported on the pillar 13 so as to be rotatable and vertically movable.

The levee body 20 is constructed of concrete, and is formed in an elongated rectangular shape having a length that closes the entire width of the water channel between the breakwaters 10 by joining two groups on both banks.

As shown in FIG. 2, the seawall 20 is internally partitioned by a large number of partition walls 21, 21 ...
Meanwhile, the interior of the compartment is a hollow ballast tank 22, 22 ... The ballast tank 22 has a ballast water injection / discharge port 23 with an opening / closing valve and a ballast water injection / discharge pump 24.
Are respectively provided, and the water in the ballast tank 22 is drained to increase the buoyancy so as to float above the water surface, and the ballast tank 22 is filled with water to reduce the buoyancy to reach the bottom of the water, It is constructed so that it will be able to withstand high waves due to its own weight.

A bearing 25 to which the above-mentioned support 13 is fitted is integrally provided at the base end portion of the seawall 20. The bearing 25 is rotatable with respect to the support 13 and supported by the support 1.
It is constructed so that it can be slid up and down while being guided by 3.

A thruster 30 is provided at the tip of the seawall 20 so that it is biased toward the bottom. This thruster 30
Is a water channel 31 that is open to both sides of the seawall 20.
And a turbine-shaped screw 3 installed in the water channel 31
2, and an engine 33 that drives the screw 32. By rotating the screw 32 in either forward or reverse direction, running water is generated in the water channel 31, and the water is injected from the water channel opening on one side. A propulsive force in the width direction is generated with respect to 20.

In the mobile tide embankment device constructed as described above, the tide embankment body 20 is normally sunk on the water bottom foundation 11b for evacuation bottom which is evacuated with the channel open. . This bottom is filled with water in the ballast tank 22,
This is done by reducing the buoyancy and allowing it to settle.

Then, when a high wave due to a typhoon or an earthquake is expected, the water in the ballast tank 22 of both seawalls 20 and 20 is drained to increase the buoyancy. In this state, the thruster 30 is operated to move the tip side of the seawall to the waterway closing side. As a result, each of the seawalls 20 is rotated in a fan-shaped direction around the pillars 13, and the seabed foundation 11 for the seashore bottom 11
It is moved to a position a, finely adjusted in position by the thruster 30, and stopped at a predetermined position where both seawalls 20 and 20 are in abutment arrangement. In this state, water is poured into the ballast tank 22 of each of the seawalls 20, 20 to reduce the buoyancy so that the seawater is allowed to settle, and the seafloor foundation 11a is settled to the bottom to form a seawall facing the high waves by its own weight.

When the function of the seawall is completed and the water channel is opened again, the water in the ballast tank 22 is discharged to increase the buoyancy to float the water, and the thruster 30 is operated to reverse the above-mentioned procedure. , Pivoting around the support shaft 13 until reaching the retreating bottom 11b.
1b is stopped, water is poured into the ballast tank 22 to be settled, and the bottom is set on the water bottom foundation 11b to be in a retracted state.

In the above example, the seawall 20 is moved by the thruster 30, but in addition to this,
You may make it move using a ship such as a tugboat.

In addition to the straight line arrangement shown in FIG. 1 described above, the water channels are closed by the two seawalls 20 and 20, as shown in FIG. It may be placed on the side and abutted in a dogleg configuration. In this way, the wave force from the open sea side can be dispersed in the longitudinal direction of the tide embankment, and the tide ability is increased.

Further, in the above-mentioned example, the case has been shown in which the seawalls are pivotally moved from both banks, respectively, and the tips thereof are brought into contact with each other to be sunk, but as shown in FIG. , 10, one seawater embankment body 20 is installed only on one side of the open sea side, and the seawater embankment body 20 is installed on the other side of the open sea side.
The ridge body tip joint portion 26 to which the tip portions of the ridges are joined is installed, and the tide body 20 is fan-shaped from one side of the opposite shore toward the other side, and the tip is joined to the ridge body tip joint portion 26 and attached. The required seawalls may be installed by bottoming them. In FIG. 4, the same parts as those in the embodiment shown in FIGS. 1 to 3 described above are designated by the same reference numerals and the description thereof will be omitted.

Further, the seawall may be a metal box or a composite structure of RC and metal in addition to the RC structure, and is a structure in which a large number of boxes are connected to form an elongated body. May be.

[0024]

As described above, the mobile tide apparatus according to the present invention has the buoyancy adjusting means for performing the floating operation on the water surface and the bottom operation on the water surface, and is installed in the predetermined seawall installation portion. Equipped with a gravity type seawall body that becomes a seawall by bottoming,
One end side of the seawall is supported so as to be rotatable and vertically movable around a vertical axis that is erected on an immovable part such as a water bottom foundation or a quay, and the seawater bank is retracted in a state of being floated above the water surface. From the seawall to the seawall in a fan-shaped direction, and the seawall body is set at a predetermined installation position of the seawall to form a seawall. The seawall can be made a structure that can be easily moved, and a highly stable mobile seawall that can withstand high wave forces can be obtained, and
A long seawall can be stored in a small space, dead space in a narrow port is reduced, and usage efficiency is improved.

In addition to the above-mentioned structure, the present invention provides seawall installation sections between opposite banks, and seawall storage sections are installed on both banks, and seawall bodies are housed in the respective seawall storage sections. , By moving each of the seawalls toward the center of the opposite banks so that the tips come into contact with each other and make them bottom, even in the case of a long seawall at a wide river mouth or harbor mouth, Since it is stored and moved, the storage space may be small and the movement is easy.

Separately from this, the seawall installation section is located between the opposite banks facing each other, and the seawall body is installed on one side of the opposite bank so as to be rotatable around the vertical axis, and the seawall body is installed on the other side. Install a ridge body tip joint to which the tip is joined, move the seawall from one side of the opposite bank to the other side, and join the tip to the ridge body tip joint to reach the bottom. By doing so, at the harbor entrances with relatively small intervals, only one seawall is required, which facilitates installation and opening / closing operations.

Further, in addition to the above-mentioned structure, the present invention is configured such that the tide embankment body is composed of a hollow concrete box body whose inside is divided by a large number of partition walls, and each of the divisions is a ballast tank capable of pouring and draining, Each ballast tank is equipped with a pouring / draining pump, and the seawater dam is floated / bottomed by pouring water into the ballast tank.
The conventional floating dock control structure can be used, and even a heavy seawall can be easily floated and sunk.

Further, according to the present invention, in addition to the above-mentioned structure, the seawall body is provided with a thruster at its tip portion so that running water can be jetted toward the left and right side surfaces. However, without using a ship or mooring winch, it can be performed easily and quickly, and the work of installing and storing the seawall can be performed in a short time.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of an example of a mobile tide apparatus according to the present invention.

2A is a plan view showing a schematic configuration of the seawall in FIG. 1, and FIG. 2B is a side view of the same.

FIG. 3 is a plan view showing a schematic configuration of another embodiment of the mobile tide apparatus according to the present invention.

FIG. 4 is a plan view showing a schematic configuration of another example of the mobile tide apparatus according to the present invention.

FIG. 5 is a plan view showing a schematic configuration of a conventional mobile tide apparatus.

[Explanation of symbols]

10 Breakwater 11a, 11b Underwater foundation 12 Strut foundation 13 props 20 Seawall 21 partition 22 Ballast tank 23 Ballast water injection outlet 24 Ballast water injection and drainage pump 25 bearings 26 Levee tip junction 30 thrusters 31 waterways 32 screws 33 engine

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hideaki Okada             2-8 Koraku, Bunkyo-ku, Tokyo Goyoken             Inside the corporation F-term (reference) 2D019 CA03

Claims (5)

[Claims] 1. A gravity-type tide embankment body having buoyancy adjusting means for floating on the water surface and bottoming operation on the water bottom, and forming a tide embankment by landing on a predetermined seawall installation portion. A state in which one end side of the seawall is supported so as to be rotatable and vertically movable around a vertical axis that is erected on an immovable portion such as a water bottom foundation or a quay, and the seawall is floated above the water surface. A movable sea tide apparatus that is capable of reciprocating in a fan-shaped direction from the retreat position to the seawall installation portion, and sets the seawall body at the predetermined installation position of the seawall installation portion to form a seawall. 2. A seawall installation section is located between opposite banks facing each other, and seawall bodies are installed on both banks so as to be rotatable about the vertical axis, and the seawall bodies are directed toward the center of both banks. 2. The movable member is moved so that the ends thereof are abutted against each other to reach the bottom.
Mobile tide protection device described in. 3. The seawall installation section is located between opposite banks facing each other, and a seawall body is installed on one side of the seashore so as to be rotatable about a vertical axis, and the tip of the seawall body is installed on the other side. A ridge body tip joint portion to be joined is installed, and the seawall body is moved from one side of the opposite bank to the other side, and the tip is joined to the ridge body tip joint portion to be landed. Item 1. A mobile tide apparatus according to item 1. 4. The tide embankment body is composed of a hollow concrete box body whose interior is divided by a large number of partition walls, each of which is a ballast tank capable of pouring and draining, and a pouring / draining pump is provided for each ballast tank. The mobile tide apparatus according to claim 1, wherein the tide embankment body is floated / bottomed by pouring water into the ballast tank. 5. The mobile tide apparatus according to claim 1, wherein the tide embankment is provided with a thruster at its tip end portion, which is capable of jetting running water toward the left and right side surfaces.