JPH04330109A - Ocan purifying bank - Google Patents

Abstract

PURPOSE:To purify sea water by using the wave energy of the CONSTITUTION:A purifying means accommodation part 71 is formed at that side face of an embankment 7 on its open sea 5 side, and in this part 71, water purifying blocks 10 are accommodated together with irregularly formed blocks 9. The sea water having intruded to the accommodation part 71 in the form that waves 13 strike it, is purified by the blocks 10 to then return to the open sea from a return hole 12.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification embankment used in coastal waters of the ocean.

0002

BACKGROUND OF THE INVENTION Conventionally, seawater contaminated by sewage poured in from rivers has been left in the nearshore waters of the ocean in a contaminated state. Furthermore, as oil flows out from moored ships in marinas and the like, pollutants adhere to the oil and float on the seawater surface, further promoting seawater pollution.

0003

[Problem to be solved by the invention] For this reason, in recent years, the seawater in the coastal waters has become extremely polluted, fish are disappearing, and the lives of fishermen are threatened, and there are areas in the sea that cannot be used for beaches, marinas, etc. It has increased. However, building seawater purification equipment in the ocean would require enormous amounts of money and power. In view of the above-mentioned circumstances, the present invention aims to provide a purification embankment that can purify seawater in nearby waters by utilizing ocean wave energy.

0004

[Means for Solving the Problems] The present invention has an embankment body (7) disposed in the ocean (1), and a wave-lashing area ( 71) is provided with seawater purification means (10) along the installation direction of the embankment body (7), and the purification means (10) is provided with a water return section (12). Note that the numbers in parentheses are for convenience and indicate corresponding elements in the drawings, and therefore, this description is not limited to the descriptions on the drawings. below

The same applies to the [Effect] column.

[0005]

[Operation] With the above-described configuration, the present invention provides the purifying means (1
0) acts to purify seawater that has entered from the wave-washing area (71) and returns it to the ocean (1).

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view showing an embodiment of a purification levee according to the present invention, and FIG. 2 is a view showing an example of an ocean near sea area.

As shown in FIG. 2, for example, a port 3 is formed in the coastal area 1 of the ocean, with the waterfront line 2a of the land 2 concave to the right in the figure. Ship mooring facilities are installed and in use. The left side of the port 3 in the figure is connected to the open ocean 5, and a purification embankment 6 is constructed and provided between the port 3 and the open ocean 5 with its lower end connected to the land 2 in the figure. .

As shown in FIG. 1, the purification dam 6 has a dam body 7 made of reinforced concrete. It is constructed in such a way that it extends in a direction perpendicular to the plane of the inner paper. The embankment body 7 has a shape that can protrude vertically from the sea level 5a at high tide, and is formed in accordance with the wave height in the near sea area 1, and the lower end of the embankment body 7 in the figure is supported by the foundation ground. Fixed to the sea floor. A purification means housing portion 71 is provided on the open ocean 5 side of the embankment body 7, that is, on the upper left side in the figure, in a form in which the embankment body 7 is depressed over its entire length in the extension direction (directions of arrows C and D in FIG. 2). The purifying means housing portion 71 is inclined low from the port 3 side to the open ocean 5 side, that is, from the right side to the left side in the figure, and has a bottom portion 71 close to the sea level 5a at the left end.
It has a. A wave return 11 is formed on the port 3 side of the purification means housing portion 71, that is, on the right side in the figure, in such a manner that the embankment body 7 protrudes upward in the figure along the entire length in the extension direction. That is, a flat portion 72 is formed on the right side in the figure. In the purification means housing part 71, irregularly shaped blocks 9 are packed in the upper part of the figure in a manner that they are lined up without collapsing. Overflow is prevented. Further, the irregularly shaped block 9 is appropriately tightened at the distal end portion (the upper end portion in FIG. 2) of the embankment body 7 in the extension direction, thereby preventing overflowing from the purifying means accommodating portion 71. On the lower bottom part 71a of the irregularly shaped block 9, a water purifying block 10 made of crushed stone or the like, each of which is formed into a smaller body than the irregularly shaped block 9, is placed in the purifying means housing part 71.
A water return port 12 is provided on the left side of the water purification block 10 in the figure so as to be located above the sea level 5a. A filtration net 121 is provided at the water return port 12 in a manner attached to the embankment body 7, and the filtration net 121 is attached to the water purification block 10.
It is formed in a reticular shape so that it cannot flow out into the open ocean 5.

Since the purification embankment 6 has the above-mentioned configuration, how seawater is purified in the near sea area 1 will be explained. Here, in the seawater in the near sea area 1, the surface layer of the seawater near the seawater surface 5a is moving in the form of waves 13 crashing from the open ocean 5 toward the land 2, and the seawater in the lower layer than the waves 13 is moving. With the undulation progressing in the direction of arrow A,
It is moving from open ocean 5 towards port 3. Further, within the harbor 3, a circulating flow of seawater indicated by an arrow B in the figure is formed in such a manner that it circulates within the harbor 3 as appropriate depending on the topography along the waterfront line 2a. Seawater in the near sea area 1 is contaminated by artificially dumping pollutants such as oil from the land 2 via rivers and within the port 3.

[0010] Now, the seawater that has been moving towards the land 2 from the open ocean 5, that is, in the direction of arrow A, is temporarily blocked from moving to the port 3 by the purification levee 6 extending between it and the port 3. The waves 13 enter the purification means housing portion 71 in the form of hitting the side of the purification bank 6. The energy of the waves 13 from the seawater that has entered the purification means housing section 71 is buffered by the irregularly shaped block 9, and if the wave 13 has a crest, it will appear on the side of the wave return 11 on the left in the figure. By colliding from the opposite direction, the water falls into the water purification block 10 without being scattered around the purification embankment 6. Then, the pollutants contained in the seawater are removed from the seawater while being attached to the water purification block 10. The seawater that has been purified by removing pollutants flows down to the left in FIG. At this time, since the return water port 12 is arranged above the seawater level 5a, the seawater flowing down along the bottom part 71a can quickly flow out to the open ocean 5 without staying in the water purification block 10. , the water purification effect of the water purification block 10 will be fully utilized. In addition, if the oil dumped in the port 3 is the source of seawater pollution, it is particularly easy to remove since most of the oil is floating in the surface layer of the seawater near the seawater level 5a. . In this way, the seawater purified through the purification dam 6 and returned to the open ocean 5 flows into the harbor 3 as part of the above-mentioned circulation flow. Then, the purified seawater that has flowed into the port 3 flows out into the open ocean 5 along the coastal line 2a along with the circulation flow, and from the open ocean 5 waves 1
3, it washes up against the purification embankment 6 again. In this way, the seawater in the near sea area 1 is gradually and continuously purified by circulating between the open ocean 5 and the port 3 via the purification levee 6, and the port 3 can be used as a leisure space such as a beach or marina. Not only will it be possible to do so, but it will also be possible to
An environment where fish and other animals can live will be restored.

Furthermore, if the inner bottom portion such as the bottom portion 71a of the above-mentioned purification means housing portion 71 is formed in such a manner that the water return port 12 is arranged on the port 3 side, and the embankment body 7 is constructed, the water purification block can be formed. It becomes possible to return the purified seawater to the port 3 via the port 10. Furthermore, in the embodiment described above,
Although we have described an example in which seawater is purified by the water purification block 10, the seawater purification means may be changed as appropriate. For example, seawater may be purified using gravel, fine sand, activated carbon, microorganisms, etc. in addition to crushed stone. , it is possible to further enhance the purification effect of seawater. Further, the purification bank 6 does not need to be a fixed structure, and the bank body 7 may be a floating body half submerged in the sea below the sea level 5a.

0012

[Effects of the Invention] As explained above, according to the present invention,
It has an embankment body 7 disposed in the ocean such as a near sea area 1, and a seawater purification means such as a water purification block 10 is installed in a wave-washed area such as a purification means housing part 71 on the side of the embankment body 7 on the open ocean 5 side. is provided along the installation direction of the embankment body 7, and the purification means is provided with a water return part such as the water return port 12 to constitute the purification embankment 6. Therefore, the purification means can remove seawater that has entered from the wave-washing area. water can be purified and returned to the ocean. Therefore, even if the purification levee 6 is not provided with any power source, seawater can be purified by using the wave energy existing in the ocean, so the cost required for ocean purification equipment is reduced. Only the construction cost and maintenance management cost of levee 6 are required. That is, by providing a large number of purification levees 6 according to the present invention in the nearshore sea area 1, a wide range of coastal sea areas can be purified and a marine environment inhabited by fish etc. can be restored, and it can also be used as a leisure space such as a beach or a marina. It becomes possible to use it.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of a purification bank according to the present invention.

FIG. 2 is a diagram illustrating an example of an ocean near sea area.

[Explanation of symbols]

1... Inshore sea area (ocean) 5... Open ocean 6... Purification levee 7... Embankment body 71... Purification means housing part (wave crashing area) 10... Water purification block 12... Water return port (water return part)

Claims (1)

[Claims] Claim 1: An embankment body disposed in the ocean, a seawater purification means provided along the installation direction of the embankment body at a part where waves hit the ocean side of the embankment body, A purification embankment with a water return section.