JPH02136413A - Excessive water depth floating wave dissipation levee - Google Patents

Abstract

PURPOSE:To make small a mooring construction, to provide no influence to the navigation of a ship and to reduce cost by mooring loosely a weight to be hung from a long sideways cubical floating body to damp permeable waves to an anchor by a mooring line. CONSTITUTION:A horizontal rectangular weight 07 is hung into the water by a plurality of vertical suspending lines 06 to be hung at an equal interval to the front and rear ends of a long sideways cubical pontoon type floating body 01 provided with a rectangular section to damp permeable waves 05 by reflecting a part of incidence waves 04. In addition, the weight 07 is moored loosely to a plurality of anchors 03 to be settled and provided on the sea-bottom by a plurality of mooring lines 02 to be expanded and provided with a wide open foot to form a floating wave dissipation levee. The extent of a mooring device in the horizontal direction is limited to the mooring lines 02 between the weight 07 and anchors 3, and an occupied area of the wide-open foot construction is reduced without having any influence of the water depth. According to the constitution, the influence to ships navigating in the vicinity is reduced to zero, and economic efficiency can be improved.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a deep-water floating breakwater.

[Conventional technology]

In order to calm specific sea areas such as fish farms and yacht harbors, it is considered that the most reliable method is to install a bottom-type breakwater, but there are some problems in terms of construction technology, construction cost, etc. due to the topographical conditions and water depth of the sea area. Due to the necessity of removal and relocation, a floating wave-dissipating levee (floating wave-dissipating levee) is sometimes adopted.

A floating breakwater consists of a floating part that floats on the water surface to dissipate waves, and a mooring device part that anchors the floating part in a predetermined position, and various structures have been manufactured or proposed in the past. Broadly speaking, there are pontoon type and sway control type.

First, in the pontoon type, as shown in the side view of Figure 2,
A box-shaped floating body 01 made of steel or concrete and having a rectangular cross section is tethered to an anchor 03 on the seabed by a mooring line 02 made of a chain or wire. In this floating wave bank, the incident wave 04 is reflected at the front surface of the floating body O1, and the transmitted wave 05 is attenuated due to energy consumption due to the up-and-down motion of the floating body, resulting in a wave-dissipating effect.

In addition, in the oscillation control type, as shown in Figure 3, short waves are reflected by the outer wall of the floating body, and relatively short waves are reflected by the steel floating body.
The movement of water inside the floating body 01 adjusts the movement of the floating body 01 caused by waves, and the phase difference between the incident wave 04 and the wave created by the floating body 01 is used to suppress the transmitted wave 05, and long waves utilize the vertical shaking of the floating body. The waves are dissipated by the energy loss of the water flowing in and out from the bottom, and like the pontoon type, it is moored to an anchor 03 on the seabed via a mooring line 02.

[Problem to be solved by the invention]

However, since all of these types of floating breakwaters are loosely moored to an anchor on the seabed by a mooring line, the skirt of the mooring structure widens greatly, so when the water depth is large, the horizontal distance between the floating body and the anchor becomes very large. As a result, the following problems arise.

(1) The amount of mooring lines will increase.

(2) The sea area occupied by mooring devices will increase, affecting the free navigation of navigating vessels.

(3) As the bottom of the mooring device becomes larger, it cannot be installed close to sea areas that should be kept calm, so the length or number of floating breakwaters increases.

The present invention was proposed in view of these circumstances, and
The purpose of the present invention is to provide a deep-water floating breakwater that is economical in bottom cost and does not have a large mooring structure even when the water depth is large and does not affect ships sailing nearby.

[Means to solve the problem]

To this end, the present invention provides an oblong cubic floating body that floats on the sea surface and attenuates transmitted waves by consuming the energy of the incident waves through reflection of the incident waves, vortex formation, friction, and movement of the floating body, and a seawater immersed portion of the floating body. It is suspended in the sea by a plurality of vertical suspension lines placed vertically at equal intervals along the front and rear ends of the floating body, and has approximately the same width as the floating body.

It is characterized by comprising a horizontal weight having the same length and a mooring line that is stretched loosely in the sea in a wide skirt shape and anchors the weight to a plurality of anchors sunk in the seabed.

[Effect]

According to such a configuration, the horizontal expansion of the mooring device is only due to the part of the mooring line that is installed diagonally between the weight and the anchor in a loose mooring manner, so it is not affected by the water depth. Therefore, it is possible to solve the above-mentioned problem of the bottom of the mooring device widening due to an increase in water depth.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view thereof.

In the above figure, 01 is a pontoon-type floating body in the shape of a horizontally elongated upright cube with a rectangular cross section, which reflects a part of the incident wave 04 and attenuates the transmitted wave 05. The floating body O1 has a horizontal rectangular weight 07 suspended in the water by a vertical suspension line 06 consisting of a plurality of chains or wires suspended at equal intervals from the front and rear ends of the floating body O1, and the weight 07 is stretched over a wide base. It is loosely moored to a plurality of anchors 03 sunk on the seabed by a plurality of mooring lines 02.

In this embodiment, the floating body is of a pontoon type, but any conventional floating body suitable for floating breakwaters may be employed. However, consideration must be given to increasing the buoyancy commensurate with the weight of the weight 07.

〔Effect of the invention〕

Such a deep-water floating breakwater not only performs the wave-dissipating effect of a conventional floating breakwater, but also has the ability to withstand increases in water depth.
Since the horizontal distance between the floating wave bank and the anchor on the seabed does not increase, the following effects can be achieved.

Tl) For mooring devices, it is only necessary to increase the length of the hanging line according to the water depth. Incidentally, in conventional floating wave banks, the mooring line length needs to be two to three times the water depth.

(2) Since the wide mooring line is stretched only between the weight suspended near the seabed and the anchor, the sea area occupied by the mooring device does not increase.

(3) Therefore, the floating breakwater itself can be installed close to the sea area to be calmed.

(4) It is possible to omit the mooring line by sinking the weight itself into the seabed as a sinker and using the suspension line as a tension leg to pull the floating body with strong tension, but if the mooring line is omitted, the floating body Since it does not move in the vertical direction, the wave-dissipating effect that utilizes the up-and-down motion of the floating body is also lost, so it is not a good idea from an overall perspective as a deep-water floating breakwater.

In short, according to the present invention, floating on the sea surface and reflecting incident waves,
an oblong cubic floating body that attenuates transmitted waves by consuming the energy of incident waves through vortex formation, friction, and movement of the floating body; and a plurality of floating bodies vertically installed at equal intervals along the front and rear ends of the seawater immersed part of the floating body. A horizontal weight suspended in the sea by a vertical suspension line and having approximately the same length and length as the floating body; By equipping the anchor with a mooring line, the mooring structure does not become large even when the water depth is large, and it is an economical deep-water floating breakwater that eliminates the impact on ships navigating nearby. Therefore, the present invention is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing one embodiment of the present invention. FIGS. 2 and 3 are side views showing known floating wave banks, respectively. 01... Floating body, 02... Mooring line, 03... Anchor, 04... Incident wave, 05... Transmitted wave, 06...
... Suspension line, 07... Weight. Agent Masa Tsukamoto, Patent Attorney Figure 2 Figure 1 Figure 3

Claims (1)

[Scope of Claims] An oblong cubic floating body that floats on the sea surface and attenuates transmitted waves by consuming the energy of incident waves through reflection of incident waves, vortex formation, friction, and movement of the floating body, and a seawater immersed portion of the floating body. a horizontal weight having approximately the same width and length as the floating body, suspended in the sea by a plurality of vertical suspension lines vertically installed at equal intervals along the front and rear ends of the floating body;
1. A deep-water floating breakwater comprising a mooring line loosely extended in the sea in a wide skirt shape and mooring the weight to a plurality of anchors sunk on the seabed.