JPS63161208A - Breakwater device - Google Patents

Abstract

PURPOSE:To prevent the erosion of a breakwater device by damping energy of waves by providing a softness for the whole of the device made up by fixing flexible columns vertically to the seabed and by connecting flexible structure- beams horizontally between the columns. CONSTITUTION:Steel rigid tubular columns 11 are erectly set on the seabed, and flexible structure-columns 12 of rubber, etc., are connected to the upper parts of the columns 11. Flexible structure-bar-like beams 2 of rubber, etc., are connected between the upper parts of the columns 11 to make up a breakwater device. When waves pass through the device, the waves are disturbed and damped in the spaces surrounded by the columns 1 and 2, and the flexture of the box is recovered by the elasticity of the device. The energy of tidal current and coastal current can thus be damped to prevent the erosion of coast and movement of sand.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a wave canceling device.

Problems to be solved by the present invention> Japan is one of the leading countries with coastal areas.

However, there is a problem in that there are many beaches along the coasts of Japan that cannot be used for recreation or fisheries due to coastal erosion and sand movement caused by waves and coastal currents.

Purpose of the Invention The present invention has been made in the above-mentioned points, and is intended to attenuate the energy of waves and coastal currents, prevent coastal erosion and sand movement, and improve the use of our country's coasts for recreation, fisheries, etc. The purpose is to provide a wave dissipating device that can be used for.

Configuration of the Present Invention> (FIG. 1) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

Kui> Device of the present invention The device of the present invention fixes a plurality of flexible columns 1 vertically to the seabed, and horizontally connects a plurality of flexible structural beams 2 between the columns 1. , the entire device is constructed with flexibility.

By flexing the entire device, waves are dissipated to prevent coastal erosion and sand movement.

Although the shape of the entire assembled device can be various depending on the installation location, usage, etc., in this embodiment, a box-shaped case will be described.

(1) The pillar 1 is a member that is fixed vertically to the seabed, mooring the entire device at a predetermined position underwater, and dissipating waves.

The structure of the pillar 1 uses a rigid steel pipe pillar 11 at the lower part, which is less affected by waves, to firmly moor the device to the seabed.

A flexible structure column 12 is connected to the upper part of the steel pipe column 11 so as not to come off due to wave force.

The flexible structure column 12 is a rod-shaped body whose rigidity gradually decreases toward the top.

As the material, for example, rubber material etc. can be considered.

In this way, the pillar 1 is constructed so that the amount of deflection of the upper part of the flexible structure pillar 12, which is most affected by wave force, is maximized.

(2) Flexible Structure Beam Material The flexible structure beam material 2 is a rod-shaped body made of rubber material or the like, which is connected horizontally between the upper parts of the columns 1 to dissipate waves.

The flexible structural beam material 2 is configured to be more flexible than the upper part of the flexible structural column 12.

(3) Assembling the device First, as shown in FIG. 1, the pillars 1 are vertically positioned on the base board at equal intervals.

Next, a plurality of flexible structural beams 2 are connected vertically and horizontally to the top of each flexible structural column 12 in a base pattern to form a box.

The scale of this device can be selected depending on the installation location, application, etc., and the reinforcing member 5 can be attached vertically, horizontally, or diagonally as necessary.

<Enterprise> Method of Implementation Methods for fixing the device assembled as described above to a predetermined seabed include a pile foundation type and a concrete footing type, but in this example, the pile foundation type will be explained.

(1) Assemble the equipment transport device on land near the installation area, and either load it on a barge or float the equipment and tow it to the installation area.

(2) Installation of the device First, the device is lowered below the water surface in the installation sea area, and the same number of foundation piles 3 as the columns 1 are driven so that they are located directly below each column 1.

The foundation pile 3 is a rigid steel pipe whose upper portion protrudes from the seabed surface.

Next, the protruding part of the foundation pile 3 is inserted into the lower end of the steel pipe column 11, and the gap in the connecting part 4 is filled with mortar 41 or the like to firmly integrate them so that they do not fall out.

Functions of the Invention (Figure 2.3) Figure 2 shows a state in which there are no waves. In this case, each member of the wave dissipating device is in a straight line, and the entire device is in a box-like state. is maintained.

If the wave dissipating device of the present invention is constructed using only rod-shaped steel pipes, the entire device will lack elasticity (and will continue to maintain its box shape even when waves come). , there is a risk of destruction due to direct exposure to large wave forces.

Therefore, the entire device must be flexibly bent to avoid direct wave force.

Figure 3 shows the state in which it is deformed under the influence of waves.

Before the wave comes from the left side of Figure 3 and passes through the wave dissipator, the wave with large wave force is traveling from left to right.

However, when the waves pass through the wave dissipating device, the waves are disturbed in the space surrounded by the columns 1 and the flexible structural beams 2, and the wave force is attenuated.

At this time, the wave dissipating device turns in the direction of wave propagation, but since it has elasticity, a restoring force acts to return it to the box-like state shown in FIG. 2.

Therefore, the restoring force does not cause the wave-dampening device to bend too much, so that it is possible to obtain a wave-dampening effect sufficient to attenuate the wave force.

Therefore, waves with large wave power do not reach the land located on the right side of the wave dissipating device.

Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

When waves pass through the wave dissipating device of the present invention, the waves are disturbed in a space surrounded by columns and flexible structural beams.

Therefore, the energy possessed by waves and coastal currents can be attenuated, and coastal erosion and sand movement can be prevented.

Therefore, Japan's coasts, which were previously unusable due to coastal erosion and sand movement, can now be used for recreation, fisheries, etc.

The device of the present invention is a combination of rod-shaped bodies.

Therefore, waves are disturbed in the space surrounded by columns and flexible structural beams, and after the wave force is attenuated, seawater can move to the back of the device.

Therefore, sufficient seawater exchange can be carried out without blocking the sea area behind the wave dissipating device.

<C> By selecting the scale and shape of the device of the present invention, it is possible to transmit small waves and currents necessary for recreation, fisheries, etc. to the sea area behind the device.

(2) The device of the present invention is installed below the water surface and does not protrude from the water surface.

Therefore, the natural scenery will not be damaged.

[Brief explanation of the drawing]

Fig. 1.2 An explanatory diagram of an embodiment of the device of the present invention. Fig. 2: An explanatory diagram of a state in which the device of the present invention is not affected by waves. Fig. 3: Deformation of the device of the present invention under the influence of waves. An explanatory diagram of the state of the whistle 1 M Yuu l Yuu

Claims (1)

[Claims] A fixed wave dissipating device fixed to the seabed, consisting of columns using members whose rigidity is lower toward the top, and flexible beams connected horizontally between the columns, which are deformed by wave force. A wave dissipating device characterized by: