JP5319190B2 - Floating pier with water quality improvement function - Google Patents

Description

  The present invention relates to a floating pier constructed by a floating structure floated on water, and relates to a floating pier with a water quality improvement function capable of preventing the water quality in the surrounding water area from being deteriorated.

  In closed water areas such as harbors and lakes, water is easily eutrophied by nitrogen and phosphorus contained in domestic wastewater and factory wastewater flowing into this water area. In eutrophied waters, phytoplankton and microalgae grow, causing red tides and water-blooming on the surface of the water surface, and the dissolved oxygen concentration in the water decreases, so the water quality may be significantly reduced.

  Therefore, as a structure for preventing the deterioration of water quality, as shown in FIG. 8, the water quality in which the weight 102 is attached to the lower end portion of the flexible tubular body 101 and the floating member 103 is attached to the upper end portion of the tubular body 101. There is an improvement structure 100. The water quality improving structure 100 is installed in water with the weight 102 placed on the bottom of the water and the floating member 103 floating on the water surface. And it can prevent that the dissolved oxygen density | concentration in water falls because the fish which gathered in the algae adhering to the surface of the tubular body 101 eat phytoplankton and a micro algae (for example, refer patent document 1).

JP 2007-330198 A (paragraph 0035, FIG. 1)

However, when the conventional water quality improvement structure 100 is installed in a narrow water area such as a closed water area, it becomes an obstacle to navigation and fishing of the ship.
In addition, when the conventional water quality improvement structure 100 is installed in the water or recovered from the water, it is necessary to work from the water using a ship, and the water quality improvement structure 100 is installed. And the collection work becomes complicated.
In addition, when a shell such as a bivalve is attached to the surface of the tubular body 101 of the conventional water quality improving structure 100, the shells that have fallen into the water from the tubular body 101 affect other living organisms inhabiting the surrounding water area. In addition, the water quality may deteriorate due to the dead carcasses.

  Therefore, in the present invention, it is possible to solve the above-mentioned problems, prevent the water quality of the surrounding water area from deteriorating without affecting the navigation and fishing of the ship, and easily install shellfish and algae in the water. It is another object of the present invention to provide a floating pier with a water quality improvement function that can be easily recovered from the water and that can prevent shellfish and algae from falling into the water.

In order to solve the above problems, the present invention is a floating pier constructed of a floating structure made of concrete floated on water, and inside the floating structure, there is an eaves storage portion opened on the upper surface and the lower surface. A net cage that is formed and is removably attached to the cocoon housing portion so that shells and algae are accommodated, so that the mesh cocoon is in a flooded state, and is a support that protrudes from the inner surface of the cocoon housing portion By engaging an engagement member provided on the mesh cage from above with the member, the mesh cage is detachably attached in the cage housing portion, and the upper portion of the cage housing portion is made of concrete or The storage frame body is partitioned by a steel frame, and a lid member for closing the upper opening of the bag storage portion is attached to the upper surface of the storage frame body .

In this configuration, shellfish such as bivalves contained in the net cage, and fish gathered in the algae contained in the net cage eat phytoplankton and microalgae in the water, which lowers the dissolved oxygen concentration in the water. The water quality in the surrounding waters (such as the suppression of red tide due to abnormal plankton) can also be expected.
In addition, it is not necessary to install a structure in the water area around the floating pier by attaching a net that accommodates shellfish and algae inside the floating pier that is installed in a harbor or lake for the ship to come in contact with. Therefore, it is possible to prevent the water quality in the surrounding water area from deteriorating without affecting the navigation of the ship and the fishery. In particular, when the floating pier of the present invention is installed in a closed water area such as a harbor or a lake, it is possible to effectively reduce the water quality by effectively using the space in the closed water area.
In addition, the trap housing part opens on the top surface of the floating structure, and the net cage can be attached to and detached from the top surface of the floating structure, so shells and algae can be easily installed in the water and easily Can be recovered from the water.
Moreover, the net cage can be easily mounted in the cage accommodating portion by lowering the mesh cage into the cage accommodating portion from above. Further, the net cage can be easily recovered from the inside of the cage accommodating portion by pulling the mesh cage up from the inside of the cage accommodating portion.
Further, since the shellfish and algae are housed in the net cage, the shellfish and algae can be prevented from falling into the water. In addition, shellfish and algae in the net cage can be collected and reused as feed and fertilizer.

  In the above floating pier with a water quality improvement function, the floating body structure may be configured such that a draft opening communicating from the draft portion on the outer surface to the inside of the ridge accommodating portion is formed.

  In this configuration, the tub housing portion is open to the side in addition to the vertical direction, and the water in the tub housing portion is easily circulated, so that the effect of improving the water quality can be enhanced.

  In the above-described floating pier with a water quality improvement function, the net fence may be configured to be extendable in the vertical direction.

  In this configuration, when the mesh basket is loaded on the loading platform of the transport vehicle and transported, the mesh basket can be shrunk in the vertical direction to reduce the size, so that the number that can be loaded on a small transport vehicle can be increased. , Transport efficiency can be increased.

In the floating pier with a water quality improvement function of the present invention, shellfish contained in the net cage or fish collected in algae contained in the net cage eat phytoplankton in the water, so that the dissolved oxygen concentration in the water is It can be prevented from decreasing, and water quality improvement in surrounding water areas (red tide suppression due to the occurrence of plankton abnormalities, etc.) can also be expected.
Moreover, by attaching a netting to the inside of the floating jetty, it is possible to prevent the water quality in the surrounding water area from deteriorating without affecting the navigation and fishing of the ship.
Moreover, by attaching and detaching the net cage from the upper surface of the floating structure in the cocoon housing portion, shells and algae can be easily installed in the water and can be easily recovered from the water.
Further, since the shellfish and algae are housed in the net cage, the shellfish and algae can be prevented from falling into the water. In addition, shellfish and algae in the net cage can be collected and reused as feed and fertilizer.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In this embodiment, a case where the floating pier with a water quality improvement function of the present invention (hereinafter simply referred to as “floating pier”) is installed in a harbor which is a closed water area will be described as an example.

[Overall structure of floating pier]
As shown in FIG. 1, the floating pier 1 is composed of a floating structure 10 floated on the water. A ship is in contact with the floating structure 10, and the floating structure 10 and the quay 2 are between. People and vehicles can travel between the floating structure 10 and the quay 2 through the erected bridge 3. In addition, in the following description, the quay 2 side of the floating structure 10 is set as the rear, and the opposite side to the quay 2 side of the floating structure 10 is set as the front.

(Structure of floating structure)
2 and 3, the floating structure 10 is a concrete hollow box-like member formed in a rectangular shape in plan view, and includes an upper surface 11, a lower surface 12, a front surface 13, a rear surface 14, and both side surfaces. 15 and 15 are formed, and the longitudinal direction is the longitudinal direction. When the floating body structure 10 is floated on the water, approximately half or more of the height direction becomes a draft portion W that is submerged in water (see FIG. 1).

  As shown in FIG. 3, the front portion of the floating structure 10 is formed with a bowl housing portion 16... Penetrating the floating structure 10 in the vertical direction by opening the upper surface 11 and the lower surface 12. ing. This cage accommodating part 16 is a space for accommodating the mesh cage 20, and is formed in a substantially square shape in plan view as shown in FIG. In the present embodiment, four heel housing portions 16... Arranged side by side in the front, rear, left, and right are formed in the center portion in the width direction at the front portion of the floating structure 10.

  The four cage housing parts 16 are partitioned by a housing frame 16a whose upper part is a concrete or steel beam structure. Moreover, the cover member 16b which obstruct | occludes the upper side opening part of each bag accommodating part 16 ... is attached to the upper surface of the accommodating frame 16a. In the present embodiment, the lid member 16b is formed of a plated steel plate in consideration that the vehicle stops on the upper surface of the lid member 16b or that various operations are performed on the upper surface of the lid member 16b. The strength of the lid member 16b is increased.

  Further, as shown in FIG. 6 (a), a rod-like support member 16c formed in an annular shape along the inner peripheral side surface is slightly spaced from the inner peripheral side surface on the inner peripheral side surface of the bowl housing portion 16. It is attached to the position.

  In the floating structure 10, as shown in FIG. 4A, a draft opening 17 is formed that communicates from the draft portion W of the front surface 13 into each tub housing portion 16... (See FIG. 3). The draft opening 17 has a rectangular shape that is wide in the horizontal direction when viewed from the front, and when the draft opening 17 is viewed from the front, it is possible to see each of the dredge storage portions 16.

Moreover, as shown in FIG. 3, a plurality of buffer members 15a... Are fixed in the front-rear direction at positions above the draft portion W of both side surfaces 15, 15 (see FIG. 2) of the floating structure 10. Are spaced apart from each other. The buffer member 15 a is an elastic member for reducing an impact when the ship contacts the side surface 15 of the floating structure 10.
As shown in FIG. 2, a plurality of mooring curved columns 11 a are attached to both side edges of the upper surface 11 of the floating structure 10.
Further, a protective steel plate 11b is attached to the rear portion of the upper surface 11 of the floating structure 10 at a position where the front end portion of the connecting bridge 3 shown in FIG.

(Composition of netting)
The mesh cage 20 is a rectangular parallelepiped cage attached to the cage housing portion 16 of the floating structure 10 as shown in FIG. 4 (b). As shown in FIG. 5 (a), the bivalve shell K is contained inside. Has been. The net 20 is divided into an upper part 21 and a lower part 22, and a lower end opening part of the upper part 21 and an upper end opening part of the lower part 22 communicate with each other.
As shown in FIG. 4B, the net cage 20 is a steel cage formed in a size that can be accommodated in the cage accommodating portion 16. As shown in FIG. 7, the net cage 20 of the present embodiment is formed in a size that can be loaded on the loading platform T <b> 1 of the small truck T and can be lifted by the crane T <b> 2 mounted on the small truck T.

As shown in FIG. 5A, the upper part 21 of the net cage 20 is formed by attaching a mesh plate 21 b to the upper surface and each side surface of the cage frame body 21 a that is a rectangular parallelepiped frame.
The lower part 22 of the net cage 20 is a flexible bag-like net, and the net cage 20 can be expanded and contracted in the vertical direction by folding the lower part 22 of the net cage 20 (see FIG. 5B). .

In the net cage 20, a plurality of ropes 23 are suspended from the upper surface of the upper portion 21. Before the net cage 20 is installed in the water, a number of clams of bivalve K such as mussels are attached to the surface of the rope 23. In addition, although the material of the rope 23 is not limited, it is desirable that it is a fiber excellent in biocompatibility and a material that disappears as the bivalve K grows.
Further, the size of the mesh of the net cage 20 is set to such a size that the grown bivalve K does not pass through the mesh and drop into the water.

  A lower end portion of a hook-like engagement member 21c whose upper end portion is bent outward is attached to the upper surface of the upper portion 21 of the net cage 20. Two engaging members 21c are attached to each side of the upper surface of the collar frame 21a. Then, as shown in FIG. 6 (b), the mesh member 20 is engaged with an engaging member 21 c provided on the mesh bag 20 from above, with the support member 16 c protruding on the inner surface of the basket housing portion 16. Can be detachably attached to the bag housing 16.

When the net cage 20 is mounted in the cage accommodating portion 16, first, as shown in FIG. 7, a small truck T is arranged on the upper surface 11 of the floating structure 10, and the crane T2 mounted on the small truck T is used. The suspended wire is attached to each engaging member 21c of the mesh cage 20 loaded on the loading platform T1 of the small truck T, and the mesh cage 20 is lifted by the crane T2.
Note that the net 20 loaded on the platform T1 of the small truck T is in a state of being contracted in the vertical direction because the lower portion 22 is folded by the weight of the upper portion 21.
Then, by lowering the net cage 20 lifted by the crane T2 into the cage accommodating portion 16, the engaging members 21c of the mesh cage 20 are engaged with the support member 16c of the cage accommodating portion 16 from above. (See FIG. 6B). In this way, the net cage 20 removably attached in the cage storage section 16 is in a submerged state in the cage storage section 16, and the clam K (FIG. 5 (a) )) Is placed in the water.

  When the net cage 20 is collected from the inside of the kite storage portion 16, the net cage 20 is lifted upward from the inside of the cage storage portion 16 by the crane T2 of the small truck T, and the net cage 20 is loaded on the loading platform T1 of the small truck T. To do. At this time, the net 20 loaded on the loading platform T1 is in a state where the lower portion 22 contracts in the vertical direction.

[Effects of floating pier with water quality improvement function]
In the floating pier 1 of the present embodiment, as shown in FIG. 4 (b), the bivalve K (see FIG. 5 (a)) housed in a net cage 20 attached inside the floating structure 10 is underwater. Eating phytoplankton and microalgae can prevent the dissolved oxygen concentration in the water from decreasing, and can also be expected to improve water quality in the surrounding waters (suppression of red tide caused by abnormal plankton).

  Moreover, as shown in FIG.4 (b), the bivalve K (refer FIG.5 (a)) is accommodated in the inside of the floating pier 1 (refer FIG.1) installed in a port in order for a ship to contact. By installing the net fence 20, there is no need to install structures in the surrounding water area of the floating pier 1, so that the space in the closed water area can be used effectively without affecting the navigation and fishing of the ship. It can prevent water quality from deteriorating.

  Further, as shown in FIG. 4A, the floating structure 10 is formed with a draft opening 17 that communicates from the draft portion W of the front surface 13 to the inside of the kite housing portion 16. By opening the side as well as the direction, the water in the tub housing portion 16 is easily circulated, so that the effect of improving the water quality can be enhanced.

  In addition, as shown in FIG. 5 (a), the bivalve K is housed in the net cage 20 and can prevent the bivalve K from dropping into the water. In addition to preventing the organism from being affected, it is possible to prevent the water quality from being deteriorated by the dead body of the bivalve K. Further, the bivalve K in the net cage 20 can be collected and reused as feed or fertilizer.

  Further, as shown in FIG. 4 (b), the cage housing part 16 in which the mesh cage 20 is accommodated is open on the upper surface 11 of the floating structure 10 and is supported on the inner peripheral side surface of the cage housing unit 16. By engaging the engaging member 21c (see FIG. 6B) provided on the mesh cage 20 from above with the member 16c, the mesh cage 20 can be detachably attached to the cage accommodating portion 16. The net cage 20 can be easily installed in the water and can be easily recovered from the water.

  Further, as shown in FIG. 7, the mesh cage 20 can be expanded and contracted in the vertical direction, and when the mesh cage 20 is loaded and transported on the loading platform T1 of the small truck T, the mesh cage 20 is contracted in the vertical direction. Therefore, the number that can be loaded on the small truck T can be increased, and the conveyance efficiency can be increased.

[Other Embodiments]
The embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the spirit of the present invention.

For example, in the present embodiment, as shown in FIG. 1, four heel housing portions 16 are formed in the front portion of the floating structure 10, but the number and positions of the heel housing portions 16 are limited. Instead, it can be set appropriately according to the size and structure of the floating structure 10.
Further, it is not necessary to store the net cage 20 (see FIG. 4B) in all the cage storage portions 16 formed in the floating structure 10, and the water quality of the surrounding water area is considered in consideration of the contamination state of the surrounding water area. It is desirable to set the number of meshes 20 necessary to improve the quality.

  Moreover, in this embodiment, although the cover member 16b which obstruct | occludes the upper side opening part of the bag accommodating part 16 is formed with the steel plate, you may use grating. Furthermore, when a large load does not act on the lid member 16b, a wooden lid member 16b may be used.

  Moreover, in this embodiment, although the draft opening part 17 is formed in the front surface 13 of the floating body structure 10, you may form the draft opening part 17 in the side surface 15 of the floating body structure 10. FIG. Further, the draft opening 17 may be formed on both the front surface 13 and the side surface 15 of the floating structure 10, and when the draft opening 17 leading from the plurality of directions to the dredger accommodation portion 16 is formed, the dredge accommodation is performed. Since the circulation efficiency of the water in the part 16 improves, the effect of water quality improvement can be heightened.

  Further, in this embodiment, as shown in FIG. 5A, the net cage 20 is divided into an upper portion 21 and a lower portion 22. However, the entire mesh cage 20 may be integrated. The net cage 20 may have a structure that cannot be expanded and contracted. Furthermore, in this embodiment, the steel mesh 20 is used, but the material of the mesh 20 is not limited, and the mesh 20 may be formed using fibers.

  Further, in the present embodiment, as shown in FIG. 6B, the hook-shaped engaging member 21 c attached to the upper surface of the net cage 20 is engaged with the support member 16 c in the cage accommodating portion 16. Although the net cage 20 is attached in the cage accommodating portion 16, the attachment structure of the mesh cage 20 and the cage accommodating portion 16 is not limited, and the mesh cage 20 can be attached to and detached from the cage accommodating portion 16. I just need it. For example, a horizontal bar-like engagement member provided on the net cage 20 can be engaged with a hook-like support member protruding inside the cage accommodating portion 16.

  In the present embodiment, as shown in FIG. 5A, bivalves K such as mussels are attached to the surface of the rope 23 in the net cage 20, but the algae is attached to the surface of the rope 23 in the net cage 20. May be attached. Thus, when the algae are contained in the net cage 20, the fish collected in the algae can eat the phytoplankton, thereby preventing the dissolved oxygen concentration in the water from being lowered, and improving the water quality in the surrounding water area. (Suppression of red tide due to the occurrence of plankton abnormalities) can also be expected. In this case, the mesh of the net cage 20 is increased so that fish can enter the net cage 20.

  Moreover, in this embodiment, although the floating pier 1 shown in FIG. 1 is installed in the harbor, the place which installs the floating pier 1 is not limited to a lake or a river.

  Moreover, in this embodiment, it aims at improving the water quality of a surrounding water area by the bivalve K (refer FIG. 5 (a)) accommodated in the net cage 20, However, When the water quality of a surrounding water area is good, Shellfish and fish can be cultivated in the net cage 20.

It is the whole perspective view which showed the floating pier of this embodiment. It is the top view which showed the floating body structure of this embodiment. It is the side view which showed the floating body structure of this embodiment. It is the figure which showed the floating body structure of this embodiment, (a) is a front view, (b) is AA sectional drawing of FIG. It is the figure which showed the net cage of this embodiment, (a) is a whole perspective view, (b) is the side view which showed each state when the net cage is expanded and contracted. It is the figure which showed the scissors accommodating part of this embodiment, (a) is a top view, (b) is the figure which showed the engagement state of the supporting member of a scissors accommodating part, and the engaging member of a net cage. It is the side view which showed the aspect which attaches the net cage of this embodiment to a cage | basket accommodating part. It is the side view which showed the structure for the conventional water quality improvement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floating pier 10 Floating structure 16 Reed receiving part 16a Receiving frame 16b Cover member 16c Supporting member 17 Draft opening 20 Reed 21c Engaging member 23 Rope K Bivalve T Small truck T1 Loading platform T2 Crane W Draft part

Claims (3)

A floating pier composed of a floating structure made of concrete floating on the water,
Inside the floating structure is formed a bowl containing portion that opens to the upper surface and the lower surface,
A net cage in which shellfish and algae are accommodated is detachably mounted in the cage accommodating portion, so that the net cage is in a flooded state ,
By engaging an engaging member provided on the mesh cage from above with a support member protruding on the inner surface of the cage accommodating portion, the mesh cage is detachably attached in the cage accommodating portion,
The upper part of the basket housing part is partitioned by a concrete or steel frame housing frame, and a lid member for closing the upper opening of the bowl housing part is attached to the upper surface of the housing frame body. A floating pier with a water quality improvement function.   The floating pier with a water quality improvement function according to claim 1, wherein a draft opening portion is formed in the floating body structure so as to communicate from a draft portion on an outer surface to the inside of the tub housing portion. The floating pier with a water quality improvement function according to claim 1 or 2 , wherein the net fence is freely extendable in the vertical direction.

Images