JP5559950B1 - Movable tsunami buffer gate - Google Patents

Abstract

The present invention provides a movable breakwater that can be operated with high reliability by avoiding complicated devices and operations and utilizing a natural force.
SOLUTION: The main structure of the breakwater is a shape in which a light material frame is sandwiched between light material plates, and is connected to a shaft column by a hinge system, and many parts are usually submerged in water. Install in condition. When the tsunami comes in, it rotates so that the breakwater gate closes around the shaft column, preventing the tsunami going up. The force required to close the breakwater is to use the tsunami moment. As for the pulling wave, it moves to return to the original open state, so there is no worry that the breakwater function will be destroyed by the pulling wave, and even if the tsunami repeatedly pushes, the effect can be exhibited as in the beginning.
[Selection] Figure 3

Description

It relates to breakwaters that are installed to prevent damage caused by tsunamis, high waves, etc., mainly through rivers and other areas where water flows.

Until now, tsunami protection breakwaters were mainly fixed types using concrete with reinforcing bars, which were large-scale and had huge material and construction costs. In addition, the movable type that has been invented until now, which does not obstruct the river flow in normal times, has a more complicated and large structure, which increases the material cost and construction cost. It was necessary to detect, and the reliability was not necessarily high.

Patent Publication 49-94136

Avoid complicated ingenuity and operations required for other movable breakwaters, and ensure that operations can be performed with high reliability by using natural power.
To reduce enormous material and construction costs for fixed breakwaters.
When installed in a river, it should effectively exhibit a wave-breaking effect when a tsunami or high wave comes in without disturbing the normal river flow.

Use light materials to reduce material costs, move in response to tsunamis that occur, not fixed types that require large-scale foundations, and function mainly in water to prevent waves from coming in later Considered. As a mechanism for moving the structure, in order to give a reliable and sufficient operating force, it is utilized by receiving the moment of the wave flowing back from the sea, closing the gate, and then the breakwater and Devised to make it.

In the present invention, wood is mainly used as a light and environmentally friendly material, so that inexpensive material costs and construction costs are sufficient. This device is movable and installed along it so as not to disturb the normal water flow, and when the tsunami comes, it works to close the sluice with the force of the water that pushes it, and then the river as a breakwater Prevent retroactive tsunamis and high waves. In normal times, the river is restrained along the shore and piers by the river flow, so it does not obstruct the passage of small ships and does not obstruct the view under the bridge. In scenic areas, disaster prevention is possible without obstructing the scenery.

FIG. 3 is a structural diagram of the present invention. These are the connection diagrams to the shaft column of the structure of the present invention. These are the installation figure of this invention, and the operation | movement figure when buffering a tsunami. Is a plan to cope with the structure when a large breakwater is required.

The structure is composed of a “gate-shaped structure” and an “axial pillar” serving as a rotation axis thereof. The structure is also made strong by sandwiching a light material frame between two light materials such as wood. (With this framework, there is a space inside, so it can take water into the space, increase the weight, and contribute to further weakening the power of the tsunami.)
In order to function as a breakwater, it is necessary to spread in the direction of functioning as a weir , and with light materials alone, 10m width is considered basic, but it is also possible to expand to a width of 20-70m by reinforcement of iron materials etc. is there.
About the height direction, 4-6m is basically installed, and it is installed so that the corresponding part of the gate height (basically about half or more) is submerged in water. As a result, the gate floats underwater, and the weight of the entire gate can be efficiently supported by the connecting portion, and can be easily moved as the gate.
The shaft column can be made of wood as long as it is sturdy, and can be placed near the riverbank or in the water of the river. The connecting part between the shaft column and the gate shall be a hinge shape such as a ring shape . The structure is installed vertically, almost along the river flow if there is one, and does not interfere with the normal water flow. Then, open the opening (water receiving part) to receive the waves rising from the sea side , and hold it with a stopper. As a result, when the tsunami began back from the sea side, with a force large water masses of the tsunami moves from the sea side on the land side, the motion to close the gate spread in the direction in which to function as a dam, the flow of tsunami Functions as a breakwater in a vertical position . Then, a stopper is installed in the water so that the most effective position as a weir can be maintained (or the structure is pulled with a wire from the sea side ) to maintain the breakwater effect.
There is a gap between the bottom of the structure and the water bottom, and the structure can move smoothly to a position that functions as a weir. In the position that functions as a weir, the tsunami is allowed to enter the land side through the gap, and the structure mainly dams up most of the subsequent tsunami, and helps to reduce the power of a large tsunami. Although the height of the weir is not so high, it can be installed on the most sea side and can prevent tsunamis that do not pass through the area by the area toward the tsunami of the structure. Can be expected.
In addition, by allowing a part of the tsunami to enter from the gap, the structure is basically placed in the water, and it is sufficient to have a strength corresponding to the structure.
When the range to function as a weir is wide, a wide width of the structure is necessary, and reinforcement with iron material or the like is performed. If it does so, the weight of the whole structure will also go up and work, such as preparation and installation, will become difficult. In such a case, the outer frame of the gate structure is made with a reinforcing material, and a plurality of light material structures divided into block shapes are inserted therein to function as a gate-shaped structure as a whole. Correspond.

1. Breakwater gate board: A pair of light-weight boards, with a frame between them to form a breakwater gate. The breakwater effect is demonstrated when the gate is closed.
2. Breakwater frame: A frame made of light material that has the same width and height as the breakwater gate plate. It is sandwiched between the breakwater gate plates and fixed to increase the strength of the breakwater gate. Holding the space inside and taking water into it increases the weight of the gate and increases the effect of reducing the power of tsunami.
3. Breakwater shaft pillar: A pillar that acts as an axis to move (open and close) the breakwater gate. When a tsunami comes in, it also plays a role of supporting the breakwater gate from behind.
4). Hinge type joint: The part that connects the breakwater gate and the breakwater shaft column, is installed so that the breakwater gate moves in the river width direction as expected. Install a large number (6 or more) of joints that wrap the shaft column in a cylindrical shape so that it functions stably.
5. Open stopper: Although the breakwater gate is open to the normal water flow, when the tsunami comes near, it is a stopper that secures the opening to receive the tsunami. It plays the role of closing the wave barrier.
6). Closed stopper: A stopper that stops the movement of the breakwater so that it can be held in place when the breakwater closes and expands to the maximum in the width direction of the river. Provide a role such as installing a stopper in the water (or pulling with multiple sturdy wires from the downstream direction in normal times).

Claims (2)

A movable tsunami buffer weir constructed by sandwiching a light material frame between light material plates and installing a structure shaped like a gate vertically in water, receiving waves rising from the sea side The structure is installed in a vertical direction of the tsunami flow around the axis column automatically using the force that a large water mass moves from the sea side to the land side due to a tsunami. spread, at a position where is perpendicular to the flow of the tsunami, functions as a weir in the water flooding of the tsunami, by blocking most of the tsunami surging and succeeding primarily serves to reduce the power of tsunami The structure has a space inside, and the weight is increased by taking in the water, and the increased weight is transferred to the tsunami, thereby consuming more energy of the tsunami and further filling the inner space with the water. The overall strength of the structure Movable tsunami buffer weir , which is useful for improving A movable tsunami buffer weir that is constructed by sandwiching a light material frame between light material plates and standing vertically on a structure like a gate so that it does not interfere with the land. The structure is installed with the opening widened to receive the incoming waves, and the structure uses the force of a large water mass moving from the sea side to the land side due to a tsunami, etc. It functions as a weir in the tsunami inundation at a position that spreads in the vertical direction of the tsunami and is perpendicular to the tsunami flow, and mainly reduces the power of the tsunami by blocking most of the subsequent tsunami The structure has a space inside, the water is taken into it to increase its weight, the increased weight is transferred to the tsunami, and more tsunami energy is consumed, and the internal space is further submerged. Structure by filling with A movable tsunami buffer weir that is useful for increasing the overall strength of the body .

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