JP3469014B2 - Underwater environment improved floating structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating structure which is moored in a required water area to provide a space on the upper deck for various purposes (sea airport, various plants, etc.).

[0002]

2. Description of the Related Art There is a conventional floating body structure as shown in FIG. 8, in which a floating body structure b having a vast upper deck is moored at a substantially fixed position by mooring means a.

[0003]

By the way, when the conventional floating body structure as described above is moored on the water, sunlight does not enter the water therebelow and the flow of the water also stagnates. There is a problem in that the growth of fish and aquatic plants is hindered and the aquatic environment deteriorates.
Therefore, it is an object of the present invention to provide a floating structure capable of improving the underwater environment in consideration of the incidence of sunlight and the flow of water.

[0004]

In order to solve the above-mentioned problems, the underwater environment-improved floating structure of the present invention is intended to improve the underwater environment below the structure in a floating structure having a vast upper deck. , The upper deck of the same structure has a number of deck openings covered with transparent covers, and also has a solar concentrator that extends downward from the deck openings and sends sunlight into the water. Is composed of a large-diameter tubular portion immediately below the deck opening, and a small-diameter tubular portion connected to the floor opening in the floor portion at the lower end of the large-diameter tubular portion, and the lower end of the small-diameter tubular portion. A light projecting lens is mounted in a watertight manner, and a reflection member for reflecting sunlight and sending it to the small diameter tubular portion below is provided on the floor portion of the large diameter tubular portion.

In the above-mentioned floating structure for improving underwater environment of the present invention, a large number of deck openings with a transparent cover formed on the upper deck are provided, and the lower end of the light collecting cylinder extending downward from the deck openings is provided. Since the light projecting lens is provided, even if the floating structure has a vast upper deck, sunlight can enter the lower deck, and the deck opening is covered with a transparent cover. Therefore, traffic on the upper deck will not be hindered. The deck opening has a large diameter so that a large amount of sunlight can enter through the deck opening, but the light collecting cylinder extending downward from the deck opening has a large-diameter tubular shape immediately below the deck opening. Section and a small-diameter tubular section connected to the floor opening in the floor section, and the floor section of the large-diameter tubular section is provided with a reflecting member for sending sunlight downward, so Compared with the case where the cylinder is composed of only the large-diameter cylindrical portion, the reduction of the internal space of the floating structure can be suppressed to a small width, and the amount of the constituent material of the light collecting cylinder can be reduced. In addition, since the reflecting member is provided below the upper deck, the traffic on the upper deck is not hindered and the space on the upper deck can be effectively used.

Further, an intermediate small-diameter cylindrical portion for horizontally transporting sunlight from above and directing it downward again is provided at both ends of the intermediate portion of the small-diameter cylindrical portion. In this case, even if the upper structure is provided on the upper deck, the intermediate small-diameter tubular portion can be provided so that sunlight can be guided into the water immediately below the upper structure. It is possible to send sunlight evenly below the floating structure, and it is expected that the aquatic environment will be greatly improved.

A tubular extension is connected to the lower end of the small-diameter tubular portion and extends below the lower surface of the floating structure, and a projection lens is attached to the lower end of the tubular extension. When the inside of the tubular extension is filled with water,
Even when this floating structure is moored in a deep water area, the sunlight guided downward through the solar light collecting tube can reach the deep water portion by the tubular extension. The effect is obtained. Then, since the inside of the cylindrical extension is filled with water, excess buoyancy is suppressed.

Further, when a weight is attached to the outer periphery of the lower end of the cylindrical extension, the posture in which the cylindrical extension is directed downward is stabilized by the weight. To be

Further, in the underwater environment-improved floating structure of the present invention, the floor opening in the floor portion at the lower end of the large-diameter cylindrical portion is provided as a circular opening whose center is offset from the center of the floor portion. The reflecting member is provided in the narrow portion of the floor portion along the periphery of the floor opening so that the position and the inclination angle can be adjusted.

As described above, the floor opening of the large-diameter tubular portion to which the small-diameter tubular portion is connected is provided in a state of being eccentric from the center of the floor portion of the same large-diameter tubular portion, and the floor portion is narrowed. When the reflection member is provided in the section, sunlight can be obliquely incident on the reflection member above the vast portion of the floor even when the sun is at a relatively low position, and the reflection member is provided. In combination with the adjustable position and tilt angle, efficient light collection can be performed.

Furthermore, if a wiper for cleaning the lower surface of the lens for projecting light at the lower end of the small-diameter cylindrical portion is provided, projection of light into water through the lens does not occur without adhesion of aquatic organisms. It will be fully implemented.

Also, when a nozzle for injecting ozone toward the lower surface of the light projecting lens is provided, adhesion of aquatic organisms is similarly prevented.

Furthermore, if the upper surface of the transparent cover that covers the opening of the deck is formed with irregularities, the effect of collecting light into the light collecting cylinder through the transparent cover is further enhanced.

Further, when a pressurized air supply / discharge means capable of adjusting the air pressure in the light collecting cylinder is provided through the air supply / exhaust port of the wall of the light collecting cylinder, the projection lens at the lower end existing in water is provided. By increasing the air pressure inside the light collecting cylinder during the removal work,
The projection lens can be efficiently removed while preventing the intrusion of external water into the condenser tube.

Further, external water suction / spout means for sucking external water by a pump and jetting it toward an underwater portion along the bottom of the floating structure so as to cause a flow of the external water below the bottom of the floating structure. Is installed, it is possible to prevent the flow of water from stagnating and to send water with a high oxygen content necessary for the habitation of fish, etc. along the bottom of the floating structure, so The effect of improving the aquatic environment along the bottom of the floating structure is enhanced in combination with the guidance to the.

Further, a pressurized air generating device for generating fine bubbles in the outside water near the bottom of the floating structure,
If equipped with a perforated diffuser connected to the device,
Since the oxygen content is positively supplied to the outside water in the vicinity of the bottom of the floating structure, coupled with the action of generating a water flow by the above-mentioned induction of sunlight into the outside water and the suction jet of the outside water,
The effect of improving the underwater environment will be further enhanced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show an underwater environment-improved floating structure as one embodiment of the present invention.
Is a perspective view showing the overall structure thereof, FIG. 2 is a cross-sectional view thereof, FIG. 3 is a cross-sectional view showing the upper part of the solar light collecting tube, and FIG. 4 is a cross-sectional view showing the lower part of the solar light collecting tube. .

As shown in FIGS. 1 and 2, the floating structure 7 moored as a helicopter on the sea has its vast upper deck 7a.
A large number of deck openings 1 are formed in the opening 1, and the openings 1 are watertightly covered by a transparent cover 1a via a seal 5 and a tightening bolt 6.

A solar light collecting tube 3 extending downward from the deck opening 1 for sending sunlight into the water is provided so as to have a mirror-like inner surface. Is
A large-diameter cylindrical portion 3a directly below the deck opening 1 and the large-diameter cylindrical portion 3
The small-diameter cylindrical portion 3b connected to the floor opening 3H of the floor portion 3F of a has a projection lens 8 attached to the lower end of the small-diameter cylindrical portion 3b. In this embodiment, the light projecting lens 8 is formed as a diffusing lens as shown in FIG. 4, and is mounted in a watertight manner with a tightening bolt 11 via a seal 10. Further, a wiper 12 for cleaning the lower surface of the light projecting lens 8 is provided, and the light projecting lens 8 is also provided.
An ozone injection nozzle 9 for preventing adherence of aquatic organisms to the lower surface of the is connected to an ozone supply means (not shown) inside the floating structure 7 via a pipe 13.

Further, as shown in FIG.
The air supply / exhaust port 14 is provided as shown in FIG.
Further, a pressurized air supply / discharge means (not shown) inside the floating structure 7 is connected via a pipe 15 with a valve.

As shown in FIG. 3, the transparent cover 1a in the deck opening 1 has unevenness on the upper surface, so that sunlight obliquely incident on the transparent cover 1a can be transparent in the time zone when the sun is in a low position. It is possible to prevent the light from being reflected on the surface of the condenser and not being able to enter the inside of the condenser tube 3.

A circular floor opening 3H formed in the floor portion 3F at the lower end of the large-diameter cylindrical portion 3a of the condenser tube 3.
Has a center at a position deviated from the center of the floor portion 3F, and the narrow portion f of the floor portion along the peripheral edge of the floor opening 3H.
In addition, a reflecting member 2 that reflects sunlight and sends it to the small-diameter cylindrical portion 3b below is pivotally attached at its lower end onto the movable table 2a so that the position and inclination angle can be adjusted, and the back surface is supported by the hydraulic cylinder 4. It is provided as follows.

As the reflecting member 2, one having a planar reflecting surface or one having a concavely curved reflecting surface is used.

Further, in the present embodiment, as shown in FIG. 2, at the bottom of the floating structure 7, as a means for causing a flow of the outside water below the bottom, the outside water is sucked by the pump 16 from below the bottom. Suction with pipe 17, discharge pipe 18 of pump 16
There is provided an external water suction jetting means for jetting a water stream from a water stream generating cylinder 19 connected to, and a pipe of the means is provided with a suppressor mixing device 20 such as ozone for suppressing adhesion of marine organisms. You may

The water flow generating cylinder 19 is mounted on the outer surface of the floating structure 7 via a hinge 21 so that its inclination angle can be adjusted.

Further, in the vicinity of the bottom of the floating structure 7, a pressurized air generator 26 is provided so as to generate fine bubbles in the outside water.
And a porous diffuser pipe 27 which is connected to the device 26 through an air supply pipe 28 and is arranged in the outside water.

In the underwater environment-improved floating structure of the present embodiment configured as described above, a large number of deck openings 1 with a transparent cover 1a formed on the upper deck 7a are provided, and downward from the deck opening 1 Since the light projecting lens 8 is provided at the lower end of the extending condenser tube 3, even if the floating structure 7 has a vast upper deck 7a, it is possible to allow sunlight to enter therebelow. Moreover, since the deck opening 1 is covered with the transparent cover 1a, it does not hinder traffic on the upper deck 7a. The deck opening 1 has a large diameter so that a large amount of sunlight can enter through the deck opening 1. However, the light collecting tube 3 extending downward from the deck opening 1 is a large size directly below the deck opening 1. A reflecting member configured to include the diameter tubular portion 3a and the small diameter tubular portion 3 connected to the floor opening 3H in the floor portion 3F, and to send sunlight downward to the floor portion 3F of the large diameter tubular portion 3a. Since 2 is provided, the reduction of the internal space of the floating structure 7 can be suppressed to a small width as compared with the case where the light collecting cylinder 3 is configured only by the large-diameter cylindrical portion, and the structure of the light collecting cylinder 3 is also provided. Since the amount of material used can be reduced and the reflection member 2 is provided below the upper deck 7a, the space on the upper deck 7a can be saved without hindering traffic on the upper deck 7a. It can be used effectively.

Further, the floor opening 3H of the large-diameter cylindrical portion 3a to which the small-diameter cylindrical portion 3b is connected is provided eccentrically from the center of the floor portion 3F of the large-diameter cylindrical portion 3a. Since the reflecting member 2 is provided in the narrow portion f of the portion 3F, sunlight can be obliquely incident on the reflecting member 2 above the wide portion F of the floor portion 3F even when the sun is at a relatively low position. With the fact that the reflecting member 2 is provided so that its position and tilt angle can be adjusted, an efficient light condensing action can be performed.

Furthermore, if the wiper 12 for cleaning the lower surface of the light projecting lens 8 at the lower end of the small-diameter cylindrical portion 3b is provided, the underwater organisms and the like will not adhere to the underwater through the lens 8 and the lens 8 will be exposed. The light will be sufficiently projected.

Further, since the nozzle 9 for injecting ozone toward the lower surface of the light projecting lens 8 is provided, adhesion of aquatic organisms is sufficiently prevented.

Further, a transparent cover 1a for covering the deck opening 1
Since the upper and lower surfaces of the transparent cover 1a have irregularities, the transparent cover 1a
Through this, the effect of condensing the light into the condenser tube 3 is further enhanced.

Further, if a pressurized air supply / discharge means capable of adjusting the atmospheric pressure in the condenser tube 3 is provided through the air supply / exhaust port 14 in the wall of the condenser tube 3, it is used for projecting the lower end existing in water. When the lens 8 is removed and replaced, the atmospheric pressure in the condenser tube 3 is increased to prevent the entry of external water into the condenser tube 3 and to efficiently remove and replace the projection lens 8. Become.

Further, external water is sucked by a pump 16 and jetted toward an underwater portion along the bottom of the floating structure 7 so as to cause a flow of the external water below the bottom of the floating structure 7. Since the suction jetting means is provided, it is possible to prevent the flow of water from stagnating and to send the oxygen-rich water necessary for the habitation of fish etc. along the bottom of the floating structure 7. The effect of improving the underwater environment along the bottom of the floating structure 7 is enhanced in combination with the sunlight guided into the water by the light collecting tube 3.

Further, a pressurized air generator 26 for generating fine bubbles in the outside water near the bottom of the floating structure 7,
Since it is equipped with the porous diffuser pipe 27 connected to the device 26, the oxygen content is positively supplied to the outside water in the vicinity of the bottom of the floating structure 7, and the above-mentioned sunlight is supplied to the outside water. The effect of improving the aquatic environment can be further enhanced in combination with the action of generating a water flow by the guidance or the suction jet of outside water.

An optical fiber may be provided inside the small-diameter cylindrical portion 3b to guide the sunlight downward while preventing loss due to diffusion.

Next, a modified example of the above-described embodiment will be described. FIG. 5 shows an underwater environment-improved floating structure constructed in the same manner as described above.
A solar light collecting tube 3 connected to the deck opening 1 with a is an intermediate small-diameter tube for temporarily carrying the sunlight from above horizontally to the middle part of the small-diameter tubular portion 3b and directing it downward again. The intermediate small-diameter tubular portion 23 is provided with inclined portions 22 and 24 at both ends thereof, respectively.

In the above-described modification, even if the upper structure 25 is provided on the upper deck 7a, the intermediate small-diameter cylindrical portion 23 is provided so that sunlight can be guided into the water directly below the upper structure 25. As a result, sunlight can be evenly sent below the floating structure 7, and a significant improvement in the underwater environment is expected.

FIG. 6 (cross-sectional view) and FIG. 7 (enlarged view of essential parts of FIG. 6) show another modification of the above-described embodiment.
In an underwater environment-improved floating structure similar to that shown in FIGS. 1 to 4, in order to allow sunlight to sufficiently reach the deep sea bottom, a tube is provided at the lower end of the small-diameter tubular portion 3b of the solar collector tube 3. The extended portions 29 are connected and are configured to extend below the lower surface of the floating structure 7.

The light projecting lens 8 is attached to the lower end of the tubular extension 29, and the inside of the tubular extension 29 is filled with clean water 32 through a valve 34 in advance. A transparent partition plate 32 is provided between the small diameter tubular portion 3b and the tubular extension portion 29. Also, on the outer periphery of the lower end of the tubular extension 29,
A weight 31 is attached.

In the modified example configured as described above, even when the floating structure 7 is moored in a deep water area, the sunlight guided downward through the sunlight collecting tube 3 is tubular. The extension portion 29 has the effect of being able to reach deep underwater portions. And the tubular extension
Since the inside of 29 is filled with water, the generation of extra buoyancy will be suppressed.

Furthermore, a weight is attached to the outer periphery of the lower end of the tubular extension 29.
Since the 31 is mounted, there is an advantage that the downwardly oriented posture of the tubular extension 29 is stabilized by the weight 31. In addition, if a part of the wall portion of the tubular extension portion 29 is formed of a transparent plate, sunlight can be leaked to the side of the tubular extension portion 29.

[0042]

As described in detail above, the following effects can be obtained by the underwater environment-improved floating structure of the present invention. (1) Since a large number of deck openings with transparent covers formed on the upper deck are provided, and a light projecting lens is provided at the lower end of the condenser tube extending downward from the deck openings, the floating structure is Even if you have a vast upper deck, sunlight can enter below it, and since the deck opening is covered with a transparent cover, it will not hinder traffic on the upper deck. . The deck opening has a large diameter so that a large amount of sunlight can enter through the deck opening, but the light collecting cylinder extending downward from the deck opening has a large-diameter tubular shape immediately below the deck opening. Section and a small-diameter tubular section connected to the floor opening in the floor section, and the floor section of the large-diameter tubular section is provided with a reflecting member for sending sunlight downward, so Compared with the case where the cylinder is composed of only the large-diameter cylindrical portion, the reduction of the internal space of the floating structure can be suppressed to a small width, and the amount of the constituent material of the light collecting cylinder can be reduced. In addition, since the reflecting member is provided below the upper deck, the traffic on the upper deck is not hindered and the space on the upper deck can be effectively used. (2) An intermediate small-diameter tubular portion for temporarily conveying the sunlight from above horizontally and directing it downward again is provided in the middle portion of the small-diameter tubular portion, and inclined reflecting members are provided at both ends. If the upper structure is provided on the upper deck, the intermediate small-diameter tubular portion can be provided so that sunlight can be guided into the water directly below the upper structure. It is possible to send sunlight evenly under objects, and it is expected that the aquatic environment will be greatly improved. (3) A tubular extension is connected to the lower end of the small-diameter tubular portion and extends below the lower surface of the floating structure, and a projection lens is attached to the lower end of the tubular extension. At the same time, when the inside of the tubular extension is filled with water, even if this floating structure is moored in a deep water area, the sunlight guided downward through the solar collector tube is With the above-mentioned tubular extension, it is possible to obtain the effect of being able to reach a deep water portion. Then, since the inside of the cylindrical extension is filled with water, excess buoyancy is suppressed. (4) When the weight is attached to the outer periphery of the lower end portion of the tubular extension, there is an advantage that the downward facing posture of the tubular extension is stabilized by the weight. (5) The floor opening of the large-diameter tubular portion to which the small-diameter tubular portion is connected is provided eccentrically from the center of the floor portion of the same large-diameter tubular portion, and the narrow portion of the floor portion has the above If a reflecting member is provided, even when the sun is in a relatively low position,
Above the vast portion of the floor portion, sunlight can be obliquely incident on the reflecting member, and the reflecting member is provided so that the position and the tilt angle can be adjusted, thereby providing an efficient light collecting action. It will be done. (6) With respect to the light projecting lens at the lower end of the small-diameter tubular portion, if a wiper that can clean the lower surface is provided, the underwater organisms do not adhere to the lens, and the light is sufficiently projected into the water through the lens. It will be done. (7) Even when a nozzle for ejecting ozone toward the lower surface of the light projecting lens is provided, adhesion of aquatic organisms is similarly prevented. (8) If unevenness is formed on the upper surface of the transparent cover that covers the deck opening, the effect of condensing light into the light collecting cylinder through the transparent cover is further enhanced. (9) When a pressurized air supply / exhaust means capable of adjusting the air pressure inside the light collecting cylinder is provided through the air supply / exhaust ports of the light collecting cylinder, the work of removing the projection lens at the lower end existing in water is performed. At this time, by increasing the atmospheric pressure in the light collecting cylinder, it is possible to efficiently remove the light projecting lens while preventing the entry of external water into the light collecting cylinder. (10) External water suction / spout means is provided below the bottom of the floating structure to suck external water with a pump and spout it toward the underwater portion along the bottom of the floating structure. The flow of water can be prevented from stagnation, and the water with a high oxygen content necessary for habitation of fish can be sent along the bottom of the floating structure. Together with this, the effect of improving the underwater environment along the bottom of the floating structure can be enhanced. (11) In the case where a pressurized air generator for generating fine bubbles in the outside water near the bottom of the floating structure and a porous diffuser pipe connected to the device are equipped, the floating structure is Since the oxygen content is actively supplied to the outside water near the bottom, the effect of improving the aquatic environment is further enhanced in combination with the action of the above-mentioned induction of sunlight into the outside water and the generation of water flow by the suction jet of outside water. To be raised.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire structure of a floating structure for improving an underwater environment as an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the floating structure of FIG.

FIG. 3 is a cross-sectional view showing an upper portion of a solar light collecting tube in the floating structure of FIG.

FIG. 4 is a cross-sectional view showing a lower portion of a solar light collecting tube in the floating structure of FIG.

FIG. 5 is a cross-sectional view showing a modified example of the underwater environment improvement type floating structure of FIGS.

FIG. 6 is a cross-sectional view showing another modified example of the underwater environment-improved floating structure of FIGS.

7 is a cross-sectional view showing a lower portion of a solar light collecting tube in the floating structure of FIG.

FIG. 8 is a perspective view showing a mooring state of a conventional floating body structure.

[Explanation of symbols]

1 deck opening 1a transparent cover 2 Reflective member 2a movable table 3 solar collector 3a Large diameter cylindrical part 3b Small diameter tubular part 3F floor section 3H floor opening F Floor Hirodai f Floor narrow part 4 hydraulic cylinder 5 seals 6 Tightening bolt 7 Floating structure 7a Upper deck 8 Projection lens 9 nozzles 10 seals 11 Tightening bolt 12 wiper 13 Ozone supply piping 14 Air supply / exhaust port Piping with 15 valves 16 pumps 17 Suction tube 18 Discharge pipe 19 Water flow generation tube 20 Marine biofouling inhibitor mixture equipment 21 hinge 22 Inclined reflection member 23 Intermediate small diameter tubular part 24 Inclined reflection member 25 Superstructure 26 Pressurized air generator 27 Perforated diffuser 31 dead weight 32 transparent partition 33 clean water 34 valves

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI E02B 15/10 E02B 15/10 Z G02B 6/00 331 G02B 6/00 331 (56) Reference JP-A-7-25382 (JP , A) JP 58-102904 (JP, A) JP 2-205813 (JP, A) JP 4-174116 (JP, A) JP 61-124333 (JP, A) JP 10-67386 (JP, A) Actual development Sho 63-176209 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) A01K 63/04 A01K 61/00 B63B 35/44 B63B 35 / 50 C02F 1/30 E02B 15/10 G02B 6/00 331

Claims (11)

(57) [Claims] 1. In a floating structure having a vast upper deck, in order to improve the underwater environment below the structure, the upper deck of the structure has a large number of deck openings covered with a transparent cover, It has a solar collector that extends downward from the deck opening and sends sunlight into the water.
The large-diameter tubular portion immediately below the deck opening and the small-diameter tubular portion connected to the floor opening in the floor portion at the lower end of the large-diameter tubular portion are disposed at the lower end of the small-diameter tubular portion. Improving the underwater environment, characterized in that a light lens is mounted in a watertight manner, and a reflection member for reflecting sunlight and sending it to the small diameter tubular portion below is provided on the floor portion of the large diameter tubular portion. Type floating structure. 2. The underwater environment-improved floating structure according to claim 1, wherein an intermediate portion of the small-diameter tubular portion is used to temporarily convey the sunlight from above horizontally and to make it downward again. An underwater environment-improved floating structure, characterized in that a small-diameter tubular portion is provided so that both ends thereof are provided with inclined reflecting members. 3. The underwater environment-improved floating structure according to claim 1, wherein a cylindrical extension is connected to a lower end of the small-diameter cylindrical part and extends downward from a lower surface of the floating structure. An underwater environment-improved floating structure, wherein a light projecting lens is attached to a lower end of the tubular extension, and water is filled inside the tubular extension. 4. The underwater environment-improved floating structure according to claim 3, wherein a weight is attached to the outer periphery of the lower end of the tubular extension. 5. The underwater environment improvement type floating structure according to any one of claims 1 to 4, wherein a floor opening in a floor portion at a lower end of the large-diameter tubular portion is offset from a center of the floor portion. Provided in a circular opening having a center at a predetermined position, and in the narrow portion of the floor portion along the periphery of the floor opening, the reflection member is provided so that the position and inclination angle can be adjusted, underwater environment Improved floating structure. 6. The underwater environment-improved floating structure according to claim 1, further comprising a wiper capable of cleaning a lower surface of the projection lens. Environmentally friendly floating structure. 7. The underwater environment-improved floating structure according to any one of claims 1 to 6, wherein in order to prevent the adhesion of aquatic organisms to the lower surface of the floodlight lens, the floodlight lens is provided. An underwater environment-improved floating structure, characterized by comprising a nozzle for injecting ozone toward the lower surface of, and an ozone supply means connected to the nozzle. 8. The underwater environment-improved floating body according to claim 1, wherein the transparent cover is provided with irregularities on its upper surface. Structure. 9. The underwater environment-improved floating structure according to claim 1, wherein a supply / exhaust port is provided in a wall portion of the solar light collecting tube, and the supply / exhaust port is provided in the same. A submerged environment-improved floating structure, to which pressurized air supply / discharge means capable of adjusting the atmospheric pressure inside the light collecting cylinder is connected. 10. The underwater environment-improved floating structure according to any one of claims 1 to 9, wherein external water is allowed to flow under a bottom portion of the structure, and the external water is sucked by a pump. Then, an underwater environment-improved floating structure, characterized in that external water suction jetting means for jetting toward the underwater portion along the bottom of the structure is provided. 11. The underwater environment-improved floating structure according to claim 1, further comprising a pressurized air generator for generating fine bubbles in the outside water near the bottom of the structure. An underwater environment-improved floating structure, comprising: a perforated diffuser connected to the apparatus and arranged in the outside water.