JP5683056B1 - Movable multistage tsunami buffer weir - Google Patents

Abstract

An object of the present invention is to provide a movable multistage breakwater that avoids complicated structures and operations, makes good use of natural forces, and operates with high reliability. The structure is made into a folding screen, and the corresponding tsunami height is increased by a multiple of the number of folding screens. At this time, the structure of the multi-stage structure is configured to take in the tsunami that has been submerged in the interior, and the structure taken up by the tsunami is taken up together with the water that has been taken in. When installing, place it on its side and lie down below the ground. [Selection] Figure 1

Description

It relates to breakwaters that are installed to prevent damage such as inundation caused by waves from the sea such as tsunamis and high waves.

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. Further, the movable type that has been invented so far is operated by a complicated device by installing an air chamber or the like, and the material cost and the construction cost increase, and the reliability is not necessarily high.
Moreover, although the concept which fixes one end of the structure of a light material, enters into water immersion, raises the other end by buoyancy and brings about a breakwater effect is known, there existed a problem of strength and an application place.

Patent No. 5329452 Patent Publication 2012-57401 Patent Publication 2012-241449 Japanese Patent No. 520791

To reduce enormous material and construction costs for fixed breakwaters. 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 investigate the installation mechanism and operation mechanism corresponding to the weakness of the structure of inexpensive materials, and to improve the practicality.
In the previous patent No. 520791, a fixed structure is created individually and a plurality of them are arranged, so that the tsunami height that can be dealt with is limited.

The following was performed in Japanese Patent No. 520791.
In order to save material costs, we considered a tsunami-automatic breakwater that uses wooden materials and is not fixed, but functions as a breakwater as needed. In order to make the structure automatically function as a breakwater, buoyancy caused by tsunami was adopted as a necessary mechanism, and it was devised to give sufficient operating force with high reliability.
The concept of fixing the one end of the light material structure and raising the other end to bring about the breakwater effect is known, but there were problems with strength and where to apply, so in the present invention, I tried to solve it.
(1) A structure is manufactured mainly with wood individually (in a unit form), and a plurality of structures (units) are arranged in series, and those arranged in series are arranged in parallel. Respond to tsunami prevention.
(2) A space is provided inside the structure, and water that has been submerged is taken into the space to increase strength and weight. The intensity of the tsunami is weakened by “incorporating the flooded water” and “making the tsunami lift the weight of the structure combined with the incorporated water”. As a secondary effect, it is not necessary to fabricate the entire structure with materials, and material costs can be reduced.
(3) Since it is difficult for a structure centered on wood to have sufficient strength to shield the inundation, the height of the inundation is not allowed to be sealed, allowing tsunami inundation behind the structure. Until the structure reaches the prevention height of the structure, the structure rises to weaken the tsunami's inundation strength. After the prevention height, the water enters the water and stands upright to prevent the subsequent tsunami from entering the land. It was. Therefore, the structure should be strong enough to prevent the invasion of subsequent waves while standing in water.
From these points, we have devised a mechanism that works effectively and functions sufficiently as a breakwater.

In this patent, in order to improve the height corresponding to the tsunami, a device was devised in which the structure was made multi-stage and the multi-stage portion was sequentially raised according to the tsunami height when the tsunami was flooded. As a result, most of the subsequent tsunamis can be prevented from entering, and it can be used as a mechanism to reduce the power of tsunamis with high assumed heights.

The following was performed in Japanese Patent No. 520791.
In the present invention, since light and environmentally friendly materials such as wood are used, inexpensive material costs and construction costs are sufficient. This device is installed lying down or buried on the ground, etc., and in the event of an emergency, it automatically rises up with buoyancy and the force of waves that push in, and acts as a breakwater. For this reason, it does not obstruct the field of view (does not obstruct the scenery in a scenic area), has the effect of weakening the wave force, and can achieve a wave-breaking effect corresponding to the height of the rising weir.
Moreover, since it functions as a weir by buoyancy against a pulling wave, it helps to reduce disasters.

Now that the tsunami response height has been improved with the patent, it can be applied to areas where the estimated tsunami height is high and the cost of installing a breakwater is expected to be enormous. It can be performed. In addition, because it can be installed under the sand or soil, in a scenic area, the scenery is not obstructed, and in areas where fishing and fish farming are carried out, there is almost no restriction on the living space and disaster prevention is possible. Can do.
Moreover, if it is installed along the existing fixed concrete breakwater, the height of the tsunami can be improved without hindering the landscape more than existing facilities.

FIG. 1 is a structural diagram of a structure (referred to as a Boseki or a breakwater door) of the previous invention. FIG. 2 is an installation diagram of the previous invention. FIG. 3 is a diagram showing the operation when the tsunami of the previous invention is buffered. FIG. 4 is an installation assumption diagram corresponding to the large-scale tsunami of the previous invention. FIG. 5 is an operation diagram of the folding screen type multistage structure of the present invention. FIG. 6 is an operation diagram of the multiple storage structure of the present invention.

The following was performed in Japanese Patent No. 520791.
The structure is made of wood board and frame. One pillar of the frame of the structure is connected to the installation surface in the form of a hinge, and the structure itself rises like a door attached to the installation surface and functions as a breakwater according to the water level.
-The structure is manufactured as a unit that is easy to handle and maintain strength, and in order to act as a breakwater for the entire coastline, multiple units are connected in series parallel to the target coastline (at the target position on the coastline). It corresponds by arranging. (See Figure 4)
・ Create a space inside the structure and take in water from the tsunami to increase the strength and weight of the structure. The work that lifts the weight of the structure and the water taken in to the tsunami will weaken the power of the tsunami.
・ The structure is made of light materials such as wood, and it is unrealistic to give it the strength to completely suppress a strong tsunami. Therefore, some of the force of the tsunami is released so that the water level close to the sea side is also given to the mountain side of the breaker door early so that the front and rear water levels can be made to be almost the same. Do not seal between. In addition, a support post is installed so that the breakwater door is held at a substantially vertical position, but it has a degree of freedom so that it can be tilted slightly to the land side to escape the power of the tsunami. As a result, a part of the water enters the mountain side from the breakwater, but since the movement of most subsequent tsunamis up to the height of the weir can be suppressed according to the inundation height, a corresponding effect can be expected. Therefore, the structure should be strong enough to prevent the invasion of subsequent waves while standing in water.
・ Due to the strength of the structure, it is not possible to give a row of structures a very high breakwater effect. Large scale tsunamis can be dealt with by installing the structures in parallel at some distance. (See Figure 4)

In this patent, in order to improve the corresponding tsunami height, it was devised to make the structure a folding screen and increase the corresponding tsunami height by a multiple of the number of folding screens. (See Fig. 5) At this time, the flooded tsunami can be taken into the structure of the multi-stage structure, so the water taken in is also taken up by the tsunami. It can be used to reduce power. In addition, the multi-stage storage format was devised to increase the corresponding tsunami height by multiples. (Refer to FIG. 6) In this case, there is an advantage of not taking up much space. In order to further reduce the power of the tsunami, it is possible to lay down and set it up in the ground, take the tsunami that invades early, and let the tsunami lift it .

1. Mountain board: A board that stands on the mountain side during operation and has confidentiality and strength.
2. Sea plate: A plate that stands on the sea side during operation and has an opening for taking in water that pushes upward. Axial horizontal column: A horizontal column that becomes the installation surface side during operation, and is joined in hinges to joints at multiple locations (three or more points) provided on the ground surface.
4). Floating horizontal column: A horizontal column that floats on water during operation, and also has a role to prevent sand and debris from invading into the structure during normal times (make the structure as space as possible).
5. Vertical pillar: A pillar that moves vertically during operation, and increases the strength of the pile and sea plate. Hinge type joint: A part that connects the horizontal shaft and the installation surface, and is fixed to the installation surface with a pile. Give strength so that it will not slip or come off when it is flooded.

Claims (2)

A movable tsunami buffer weir constructed by sandwiching a light material frame between light material plates and installing a structure like a door along the ground or wall, when the structure enters water In the mechanism of a movable tsunami buffer weir, which rises by using the buoyancy and wave power of the tsunami and plays the role of reducing the power of the tsunami. The corresponding tsunami height is increased by a multiple of multiple stages, and the movement of most of the subsequent tsunami is suppressed by that height, and at the same time, the flooded tsunami is taken into the structure. A movable multi-stage tsunami buffer weir that reduces the power of the tsunami by lifting the tsunami. A movable tsunami buffer weir constructed by sandwiching a light material frame between light material plates and installing a structure like a door along the ground or wall, when the structure enters water In the mechanism of the movable tsunami buffer weir, which rises using the buoyancy and wave power of, and plays the role of reducing the power of the tsunami, by creating a unit type structure in a multistage retractable type, The corresponding tsunami height is increased by a multiple of multiple stages, and the movement of most of the subsequent tsunami is suppressed by that height, and at the same time, the flooded tsunami is taken into the structure. A movable multi-stage tsunami buffer weir that reduces the power of the tsunami by raising it to the tsunami.

Images