KR100187429B1 - Wave break connecting mat and tube - Google Patents

Abstract

The present invention relates to a confiscation type breakwater connecting a flexible mat and air tube as a device for preventing waves entering the shore to protect the vessels and coastal farms moored in the port, connecting two thin plates and three circular buoyancy materials It can be used as a structure, flexible mats made of PU cloth instead of flat plates, air tubes can be used, and steel wires, chains and anchors can be used to secure air tubes and PU mats at certain points under the water surface. It includes a device that is subjected to a constant force.

Description

Confiscated breakwater with flexible mat and air tube

1 is an explanatory diagram of an apparatus of the present invention.

2 is a mooring system of the present invention.

3 is a conceptual diagram of the apparatus of the present invention.

* Explanation of symbols for main parts of the drawings

1: PU mat 2: Air tube

3: anchor 4: steel wire

5: chain 6: rigid wire connecting plate

The present invention relates to a forfeited breakwater connecting a flexible mat and an air tube.

A breakwater is a device that blocks waves entering the coast to protect mooring vessels and coastal farms in the harbor. Most conventional breakwaters are fixed breakwaters using stone or concrete.

These breakwaters completely block the subsurface flow as well as the waves that occur on the surface, thus accelerating the destruction of marine ecosystems and the pollution of water in the coast.

Floating breakwater floated on the water surface to solve the smooth circulation of seawater, which is a disadvantage of the fixed breakwater has a problem that the breakwater is damaged or the mooring line is broken by high waves. In addition, because both fixed and floating breakwaters are exposed above the water level, they harm the marine landscape and hinder the operation of the ship.

The present invention is a confiscation type breakwater connecting the flexible mat (Mat) and the circular tube (Tube) made of a PU (Polyurethane) cloth with a low risk of breakage even in high waves while supplementing the disadvantages of the existing breakwater.

Known Japanese Patent Application Laid-Open Nos. 54-41534 or 52-93239 disclose a connection between a floating body and a mesh-like sheet, or diffraction by an object when a thin plate or circular cylinder is fixed at a certain point under the water. The energy is partially reflected (reflected) and partially transmitted (transmitted).

Therefore, the fact that the energy of the wave passing through the object is greatly reduced compared to the energy of the incident wave is found in the literature (Fig. 1a), and it is a composite structure breakwater that connects a thin plate and a circular cylinder. B). That is, the incident wave is reflected by two flat cylinders having a constant length and three circular cylinders having a constant diameter to reduce the amplitude of the transmitted wave.

In order to increase the efficiency of the breakwater and reduce the impact caused by waves, an air tube made of a flexible PU cloth was used instead of a thin plate (FIG. 1c).

PU mats are deformed in the longitudinal direction by waves because of their flexibility, unlike rigid bodies. The deformation of the mat generates new radiated waves, thus further reducing the amplitude of transmitted waves by overlapping with existing waves (incidence wave, reflected wave, and transmitted wave).

In order to fix the breakwater of the present invention at a certain point under the water, a mooring system composed of steel wires, chains and anchors was used (FIG. 2). The center air tube is connected to a steel wire fixed to the bottom of the sea floor. Therefore, the steel wire is tensioned by the buoyancy of the air tube, so the movement of the air tube is possible only in the horizontal direction. Two air tubes connected at both ends and anchors at the bottom of the sea floor are connected by chains. When there is no wave, install the chain in a certain force (Pre-tension).

Therefore, the vertical tension on the chain limits the vertical movement of the air tube, and the horizontal tension causes a constant initial tension in the longitudinal direction of the PU mat.

This initial tension serves to control the deformation of the mat in the wave.

Two steel wire chains are installed per set. The most effective breakwaters should be inverted in phase with the incident wave generated by the PU mat and air tube.

In order to maintain this condition, the immersion depth of the breakwater, the length and initial tension of the mat, and the size of the air tube must be properly adjusted. Therefore, the main wave height, wave direction and wavelengths of the sea area to be installed should be predicted in advance to determine the optimal breakwater shape.

The breakwater of the present invention is significantly cheaper than the conventional breakwater. In addition, because it is light, it is easy to install, move and recovery, it is easy to repair when damaged.

EXAMPLE

It is a structure that connects two thin plates and three circular buoyancy materials, and it is possible to use a flexible mat (1) made of PU cloth instead of thin plates to increase the breaking efficiency. 2) can be used, using the steel wire (4), chain (5), anchor (3) to install a mooring device to maximize the breakthrough effect while fixing the air tube and PU mat at a certain point under the water, and Maintain initial tension in the longitudinal direction of the PU mat by applying a constant force to the chain during installation.

Claims (1)

In the breakwater connecting two thin plates and three buoyancy materials, a flexible mat (1) made of PU cloth is installed under water to increase the breakwater efficiency, and an air tube (2) that is not broken by waves as a circular buoyancy material. Mooring that is connected to the mat (1) but also installed under water, and maximizes the breaking effect while fixing the air tube and the PU mat at a certain point under the water by using steel wires (4), chains (5), and anchors (3). A confiscated breakwater that connects a flexible mat and air tube that uses a device and maintains an initial tension in the longitudinal direction of the PU mat by applying a constant force to the chain.