JP2002275856A - Seawater replaceable breakwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deterioration of water quality in a port by imparting the seawater replacing function to a breakwater itself. SOLUTION: A retarding chamber 6 communicating with the port outside 5 is arranged on the inside or in a front part of a bank body 3. A water introducing hole 9 communicating with both the retarding chamber 6 and the port inside 8 is arranged in a rear wall 7 or a floor surface 14 of the retarding chamber 6. A hood-like cover 15 for channeling seawater downward is arranged in an outlet of the water introducing hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seawater exchange type breakwater which can prevent waves from entering the port from outside the port and can easily maintain the water quality in the port.

[0002]

2. Description of the Related Art Conventionally, breakwaters are generally constructed so that waves do not enter the harbor from outside the harbor, so that seawater tends to stay in the harbor and the water quality in the harbor tends to deteriorate. There was a problem.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a seawater exchange function to a breakwater itself to prevent deterioration of water quality in a port. It is an object of the present invention to provide a seawater exchange type breakwater.

[0004]

In order to solve the above-mentioned problems, the present invention is configured as follows.

(1) A water retarding chamber is provided inside or in front of the embankment body and communicates with the outside of the port, and a water introduction hole communicating with both the water retarding chamber and the inside of the port is provided on the rear wall or floor of the water retarding chamber. Seawater exchange type breakwater which is the feature.

(2) The seawater exchange type breakwater according to (1), wherein the water introduction hole is installed obliquely from outside the port toward the inside of the port.

(3) The water hole is inclined obliquely downward from outside the port toward the inside of the port.
Or the seawater exchange type breakwater according to (2).

[0008] (4) A water play chamber is provided inside or at the front of the embankment body, which communicates with the outside of the port, and a water introduction hole is provided on the rear wall or floor of the water play chamber, which communicates with both the water play chamber and the inside of the port. A seawater exchange type breakwater characterized by providing a hood-shaped cover for causing seawater to drift downward at an outlet of a water guide hole.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (1) First Embodiment FIG. 3 is a perspective view of a harbor, and a seawater exchange type breakwater 2 is constructed in front of a harbor 1 such as a fishing port. This breakwater 2
As shown in FIG. 1, a water retarding chamber 6 is provided in an upper portion inside the bank body 3. The water chamber 6 is provided with a plurality of openings 12 provided in the front wall 11 of the embankment body 3 so as to be located outside the port (outside sea) 5.
And a plurality of water introduction holes 9 provided in the rear wall 7 of the embankment body 3 to communicate with the port 8.

The opening 12 is preferably a vertically long slit, but is not necessarily limited to a vertically long slit as long as it has a shape conforming thereto. The opening 12 is
Although it has a height almost equal to the height of the water-retaining chamber 6, it can be designed arbitrarily. On the other hand, the water introduction hole 9 is provided so as to be located near the floor surface 14 of the water retarding chamber 6. Reference numeral 4 indicates a filling room.

As shown in FIG. 2, the retarding chamber 6 includes a partition 10
The water chambers 6 each have the same number of openings 12 and the same number of water introduction holes 9.

Next, the water quality preservation action of the seawater exchange type breakwater in the port will be described.

As shown in FIG. 4, a rush wave a rushing from the port (outside sea) 5 toward the breakwater 2 passes through a vertically long opening 12 provided in a front wall 11 of the levee body 3 to recharge. After entering the chamber 6, the inside of the water retarding chamber 6 is flooded by the pushing wave a.

Next, as shown in FIG. 5, when a wave is drawn from the breakwater 2 to the outside of the port (outside sea) 5 (pulling wave b), the sea surface b 'in the water retarding chamber 6 and the sea surface c in the port 8 are connected. Head difference H
Occurs, and the seawater in the retarding chamber 6 flows into the harbor 8 as shown by an arrow e through the water guide hole 9 provided in the rear wall 7 of the embankment body 3, and the seawater in the harbor 8 is replaced. .

As described above, according to the present invention, seawater from outside the port (outside sea) 5 is introduced into the water-reducing chamber 6 at the upper part of the embankment by using the pushing wave a, and the inside of the water-reducing chamber 6 generated by the drawing wave b The seawater in the water retarding chamber 6 is discharged into the harbor 8 from the water guide hole 9 in the rear wall of the embankment by utilizing the head difference H between the sea surface b 'of the harbor and the sea surface c of the harbor 8. 8 in harbor using wave b
Seawater can be constantly replaced with seawater outside the port.

The opening 12 provided in the bank 3
Seawater exchange amount and transmitted wave (wave transmitted through the water guide hole) by relatively adjusting the height of the water and the water guide hole 9.
Can be adjusted. (2) Second Embodiment In the above description, the case where the water retarding chamber 6 is provided in the upper part inside the bank body 3 has been described, but as shown in FIG. The same effect can be obtained by providing.

In this embodiment, the opening 12 having the above-mentioned shape is provided above the second front wall 11 ′, and the water introduction hole 9 penetrates the bank 3. The other parts are the same as those of the first embodiment, so the same parts are denoted by the same reference numerals, and detailed description will be omitted. (3) Third and Fourth Embodiments As shown in FIGS. 7 and 8, when the water guide hole 9 is formed in an L-shape and the water guide flow e is discharged as deep as possible in the harbor 8, the seawater is discharged. The stirring effect can be further enhanced.

Since other parts are the same as those of the first embodiment, the same parts are denoted by the same reference numerals, and detailed description is omitted. (4) Fifth and Sixth Embodiments As shown in FIGS. 9 and 10, the water guide holes 9 provided in the breakwater 2 are inclined obliquely downward from the water retarding chamber 6 (60) toward the harbor 8. It may be inclined. In this case,
The seawater e in the water play chamber 6 (60) flows obliquely downward into the port 8, and the purification of the seawater in the port 8, particularly the vertical mixing of the seawater in the port, is further promoted. The inclination angle θ of the water introduction hole 9 is 3
A range of 0 to 60 degrees is preferred.

As described above, the water guide hole 9 may be inclined not only diagonally downward but also in any direction. In this case, the headwater can be sent to any water area on the port 8 side. For other parts,
Since this embodiment is the same as that of the embodiment, the same reference numerals are given to the same portions, and detailed description is omitted. (4) Seventh Embodiment By the way, as shown in FIG. 11, when a hood-shaped cover 15 is attached to the rear wall 7 of the bank body 3 to cover the outlet of the water introduction hole 9,
The seawater e discharged from the water introduction hole 9 is deflected downward by the hood-shaped cover 15, and the vertical mixing of the seawater in the port 8 is promoted. As a result, seawater purification in the port 8 is further promoted. Further, it is possible to reduce transmitted waves, that is, waves transmitted through the water introduction holes 9.

As shown in FIGS. 12 and 13, the cover 15 is formed of two side surfaces 16 and one end plate 17 and has a downward opening 18. The width and height of the cover 15 are equal to or slightly larger than the diameter of the water guide hole 9. When the width and height of the cover 15 are extremely larger than the diameter of the water hole 9, the water flow discharged from the water hole 9 diffuses in the hood-shaped cover 15, making it difficult for the port to be vertically mixed. Become.

Since the other parts are the same as those of the first embodiment described above, the same parts are denoted by the same reference numerals and detailed description is omitted. (5) Eighth Embodiment As shown in FIG. 14, when the water guide hole 9 is close to the water surface c, a hood-shaped cover 15 is attached to the rear wall 7 of the embankment 3 to cover the outlet of the water guide hole 9. Then, the seawater e discharged from the water introduction hole 9 is deflected downward by the hood-shaped cover 15, and the mixing of the seawater in the port 8 in the vertical direction is promoted, and the effect of reducing the transmitted wave is obtained.

In the above-described seventh and eighth embodiments, the example in which the hood-shaped cover 15 is provided at the outlet portion of the water-guiding hole 9 has been described. Any shape and structure can be applied as long as the water flow e can be deflected downward.

[0023]

As described above, according to the present invention, seawater from outside the port (outside sea) is introduced into the water reserving room at the upper part or the front part of the embankment using the pushing wave a, and Using the head difference H between the sea surface b 'in the room and the sea surface c in the port, seawater in the retarding room is discharged into the port from the water guide hole in the rear wall of the embankment body. The seawater in the harbor 8 can be constantly replaced by seawater outside the harbor. As a result, it became possible to efficiently preserve the water quality in the port while preventing the intrusion of waves by the breakwater.

[0024] Further, the water introduction hole is provided in the breakwater so as to be inclined obliquely downward from the retarding chamber toward the port.
Seawater e in the retarding chamber flows downward into the port, and the purification of seawater in the port is further promoted.

Another aspect of the present invention is to provide a hood-shaped cover for causing seawater to drift downward at the outlet of the water guide hole, so that the seawater e discharged from the water guide hole is directed downward by the hood-shaped cover. It has been deflected to promote vertical mixing of seawater in the harbor. As a result, seawater purification in the port has been further promoted. Further, it has become possible to reduce the transmitted wave, that is, the wave transmitted through the water introduction hole.

[Brief description of the drawings]

FIG. 1 is a seawater exchange type breakwater of the present invention (first embodiment).
FIG.

FIG. 2 is a sectional view taken along line AA ′ of FIG. 1;

FIG. 3 is a perspective view of a port where a seawater exchange type breakwater of the first embodiment is installed.

FIG. 4 is an explanatory diagram of a pushing wave.

FIG. 5 is an explanatory diagram of generation of a headwater flow.

FIG. 6 is a seawater exchange type breakwater of the present invention (second embodiment).
FIG.

FIG. 7 is a seawater exchange type breakwater of the present invention (third embodiment).
FIG.

FIG. 8 is a seawater exchange type breakwater of the present invention (fourth embodiment).
FIG.

FIG. 9 is a seawater exchange type breakwater of the present invention (fifth embodiment).
FIG.

FIG. 10 is a longitudinal sectional view of a seawater exchange type breakwater (sixth embodiment) of the present invention.

FIG. 11 is a longitudinal sectional view of a seawater exchange type breakwater (seventh embodiment) of the present invention.

FIG. 12 is an enlarged sectional view of a main part of FIG. 11;

FIG. 13 is a sectional view taken along line BB ′ of FIG. 11;

FIG. 14 is a longitudinal sectional view of a seawater exchange type breakwater (eighth embodiment) of the present invention.

[Explanation of Signs] 3 Embankment body 5 Out of port 6 Recreational room 7 Rear wall 8 In harbor 9 Water hole 14 Floor 15 Hood-shaped cover

Continuation of the front page (72) Inventor Tadashi Yoshimura 5-6-4 Tsukiji, Chuo-ku, Tokyo Mitsui Engineering & Shipbuilding Co., Ltd. F-term (reference) 2D018 BA12

Claims (4)

[Claims] 1. A water retardation chamber that communicates with the outside of a port is provided inside or in the front of the embankment body, and a water introduction hole that communicates with both the water relaxation chamber and the inside of the port is provided on the rear wall or floor of the water retardation chamber. Seawater exchange type breakwater. 2. The seawater exchange type breakwater according to claim 1, wherein the water introduction hole is installed obliquely from outside the port toward the inside of the port. 3. The seawater exchange type breakwater according to claim 1, wherein the water introduction hole is inclined obliquely downward from outside the port toward inside the port. 4. A water retardation chamber communicating with the outside of the port is provided inside or in the front of the embankment body, and a water introduction hole communicating with both the water relaxation chamber and the inside of the port is provided on a rear wall or a floor surface of the water retardation chamber; A seawater exchange type breakwater characterized by providing a hood-like cover at the outlet of the hole for causing seawater to drift downward.