JPH0584767B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrophilic seawall for forming an artificial beach having an artificial sandy beach in an area where water depth rapidly increases from the land.

[Conventional technology]

Conventionally, artificial beaches have been built using relatively shallow topography, but it was unthinkable to build an artificial beach in an area where the water suddenly becomes deeper from the land.

However, in recent years there has been an increase in requests to create artificial beaches in areas that were previously unthinkable, and especially in Japan, which is surrounded by the sea, such requests are likely to increase in the future.

[Purpose of the invention]

The present invention was made in response to the above-mentioned demands, and is suitable for use in areas where the water depth rapidly increases from the land, where there is little influence from waves, where there is good circulation of seawater from the open sea, and which is suitable for water play. The purpose is to provide a hydrophilic seawall that can form a beach.

[Summary of the invention]

The hydrophilic seawall of the present invention to achieve the above object arranges arc parts lower than sea level between a plurality of cells higher than sea level in the sea at a predetermined distance from land, and By constructing a cellular revetment using steel plates or sheet piles in close contact with each other, and by injecting sand into the land side of the revetment so that it is located lower than the arc portion near the cellular revetment, The artificial beach is characterized by the fact that waves from the open sea flow in from the narrow area between the cells in the arc section, so that their force is attenuated and the waves from the open sea are Seawater always circulates with the outside, and the seawall prevents sand from flowing out.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of the vicinity of a hydrophilic seawall in an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. .

First, this hydrophilic seawall is installed in an area where the water depth rapidly increases from the land 1, and cells 2 such as steel plate cells or steel sheet pile cells are placed in the sea W separated from the land 1 by a predetermined distance. The arc part 3
A cellular seawall is constructed by arranging these cells alternately and placing them in close contact with each other, and each cell 2 is set at sea level WL.
While making it higher, the top end 3A of each arc portion 3
is lower than sea level WL.

Next, an appropriate amount of sand S is poured into the interior of the land 1 side of the cellular revetment that has been cast as described above, so that it is located lower than the arc portion 3 during this revetment.
It forms an artificial beach with artificial sand.

In addition, the area around the bottom of the cell 2 and arc portion 3 after pouring is covered with a covering stone 4 to prevent scour, and
If necessary, a connecting bridge 5 may be constructed above the cell 2, or a multipurpose stage as shown by 6 in FIG. It can be used as a variety of beach leisure facilities.

As described above, in the present invention, waves from the open sea are partially blocked from entering by the cell 2 which is higher than the sea level, and the rest enters onto the top end 3A of the arc portion 3 which is lower than the sea level, and Since its energy is taken away while entering the narrow space of cell 2,
The artificial beach will be invaded by calm waves.

In addition, the seawater in this artificial beach will always be recycled with fresh water from the open sea.

Furthermore, in the seawall of the present invention, the cells 2 and the arc portions 3
The seawalls are constructed in close contact with each other without any breaks, and at the time of this seawall, sand S is placed on the land side of this seawall so that it is located lower than the arc part 3.
The sand S can be prevented from being washed away to the outside of the artificial beach, and the artificial beach can be preserved.

Although not shown in the figure, both ends of the above-mentioned cellular seawall are connected to the land 1 as appropriate.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to form an artificial beach in an area where the water depth rapidly increases from the land, and waves from the open sea are prevented from invading by the cells, some of which are higher than the sea level. Waves that enter an artificial beach are always calm because they are intercepted and the remainder enters above the top of the arc below sea level, and the energy of the wave is taken away while entering the narrow gap between adjacent cells. , an artificial beach having artificial sand suitable for safe and comfortable water play can be obtained.

In addition, since seawater can freely flow in and out of the arc section whose top is lower than the sea level, the artificial beach is always supplied with fresh seawater from the open sea, allowing a good natural environment to be maintained.

Furthermore, this revetment is constructed with the cells and arc portions in close contact with each other without any breaks, and at the time of this revetment, sand is placed lower than the arc portion to form an artificial sand beach, so sand is not washed away to the outside. This has the effect of preventing sandy beaches and preserving artificial beaches.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the vicinity of a hydrophilic seawall in an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1. 1...land, 2...cell, 3...arc, 3A...top, S...sand, WL...sea level, W...underwater.

Claims (1)

[Claims] 1. Construct a cellular seawall by arranging arc parts lower than sea level between multiple cells higher than sea level in the sea at a predetermined distance from land, and making them stick together. This is a hydrophilic seawall in which sand is poured into the land side of the seawall so as to be located lower than the arc part to form an artificial sandy beach.