JP3212514B2 - Environmentally friendly floating structure and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment-friendly floating structure taking into consideration the marine environment and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, in view of the importance of global environmental issues, there has been an increasing demand for environmental conservation that, when performing various civil engineering and construction works, the surrounding environment related to the work should be preserved. I have. For example, looking at the construction of the sea such as harbor construction, etc., attempts such as to ensure the ecosystem is made organisms eg algae such marine ecosystems with Re risk of fracture with the work transferred to alternative locations ing. However,
Such cases are rare cases, and there are few cases where construction is carried out from the perspective of protecting ecosystems, creating or improving the environment, as much emphasis is placed on functionality and economy. That is the fact.

FIG. 7 shows an example of a sectional structure of a conventional floating structure such as a general floating breakwater. In the same figure, a horizontal rib 5 ', a vertical rib 6', and a stud dowel 4 'are attached as reinforcements to the inner surface side of a steel plate 2' formed in a box shape to produce a steel shell, and the outer periphery of the steel shell is manufactured. After arranging the reinforcing bar 7 'along the surface, the outer concrete
To produce the floating body 1 '. The floating body 1 'manufactured in this manner is moored in a predetermined sea area by mooring means such as a mooring chain 8', or a plurality of floating bodies 1 'are interconnected to form a mooring chain, for example. 8 'and the like.

[0004]

In such a conventional floating body structure, the outer peripheral wall of the floating body 1 'in contact with seawater has
Since it is composed of ordinary concrete 3 'having high water tightness, it is not suitable for marine organisms such as algae, kelp and shellfish to adhere to and propagate, thereby leading to destruction of the marine environment. was there.

Accordingly, the present invention provides a marine environment in which marine organisms such as algae, kelp, shellfish, etc. adhere well to the surrounding wall and proliferate, and more fish can also inhabit. Another object of the present invention is to provide an environment-friendly floating structure and a method for producing the same, which are improved so that the marine ecosystem is preserved in a natural state.

[0006]

In order to solve the above-mentioned problems, in the method of manufacturing an environment-friendly floating body structure according to the present invention, first of all, the outer peripheral surface of the steel shell below the water surface is reduced.
Along the outer peripheral surface least part, at a gap between the outer peripheral surface of the steel shell, placing the porous concrete formwork. Then, ordinary concrete is poured into the gap between the steel shell and the porous concrete formwork. In this way, the steel shell , the ordinary concrete, and the porous concrete formwork are integrally joined, and marine organisms such as algae, kelp, shellfish, etc. adhere well to the outer peripheral wall and propagate. In addition, an environment-friendly floating structure is constructed around the area where many fish can live.

[0007] Further, the environment-friendly floating structure of the present invention comprises:
At least the outer peripheral surface of the outer peripheral surface of the steel
Some have a porous concrete layer that forms the outer surface of the porous concrete via the ordinary concrete layer.

Furthermore, environmentally friendly floating structure of the present invention, are connected to each other has a plurality of浮函body to be anchored installed in waters at least part of the floating of the respective浮函body The box is the water surface of the steel shell that constitutes the floating body.
At least a part of the lower outer peripheral surface is provided with a porous concrete layer forming an outer surface of the porous concrete via a normal concrete layer.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 shows a cross section of a floating breakwater as an example of the environment-friendly floating body structure of the present invention. In the figure, a floating breakwater is used to moor a single floating body 1 to a seabed g via a mooring chain 8 or to connect a plurality of floating bodies 1 to each other and similarly through a mooring chain 8. Moored to the sea floor g, or installed in the sea area on the sea surface s near the coast.

The floating body 1 is formed by casting ordinary concrete on the outer peripheral surface of a steel shell formed by a steel plate 2 to form a peripheral wall composed of an ordinary concrete layer 3. In contact with seawater on the outer peripheral surface of the surrounding wall
The porous concrete layer 10 forming the outer surface of the porous concrete to be formed is formed.

FIGS. 3, 4, 5 (1) to 5 (5)
The manufacturing method and construction method of the floating body 1 are shown below. First,
At the factory, as shown in FIG. 3, a steel plate 2 is formed in a box shape, reinforced by horizontal ribs 5 and vertical ribs 6, and a stud dowel 4 is attached to form a steel shell as shown in FIG. 1A
To produce

Next, after transporting the steel shell 1A to the outfitting wharf by means not shown, as shown in FIGS. 3 and 4 , a reinforcing bar 7 is disposed around the steel shell 1A. And po
The porous concrete formwork that forms the porous concrete layer 10 is placed on the side and bottom sides of the steel shell 1A submerged in the sea with a predetermined gap between it and the steel shell 1A. After the general form 11 is installed on the upper surface side of the steel shell 1A that emerges on the sea surface with a predetermined gap between it and the steel shell 1A, the ordinary concrete 3 is poured into each of the gaps. .

In this manner, on the outer peripheral surface of the steel shell 1A,
Although peripheral wall consisting Hiroshi through the concrete layer 3 is formed,
As shown in FIG. 5 (3), the used general formwork 11 for the upper surface is removed later, and the porous concrete formwork forming the porous concrete layers 10 for the both side surfaces and the bottom surface is not removed. It is diverted as the porous concrete outer wall of the floating body 1 as it is. As a result, a floating body 1 having a predetermined length is completed. Note that the ordinary concrete layer 3 forming the upper peripheral wall of the floating body 1 is not cast on the outfitting quay, but is formed by casting ordinary concrete after installing the floating body 1 on the site in the installation sea area. It may be.

The floating body 1 thus manufactured is shown in FIG.
As shown in (4), the water is launched by the crane ship 12, and as shown in FIG. 5 (5), it is towed to the site in a floating state by the tugboat 13, and as shown in FIG. are moored to the seabed g via, or浮凾body 1 of several are connected to each other, at the installation position, is anchored to the seabed g through a mooring chain 8, installation is completed. FIG. 6 shows an example of a floating breakwater configured by connecting three sets of floating bodies 1.

As described above , the porous concrete used as the porous concrete form 10 'and diverted as the peripheral wall composed of the porous concrete layer 10 on the side surface and the bottom surface of the floating body 1 has an infinite number of pores therein. Water and air flow easily, for example, a compressive strength of 10
It is a porous concrete of about 0 to 200 kg / cm ² .

[0016] In this way, the floating breakwater of the present invention formed a porous concrete layer on the side and bottom surfaces in contact with sea water on the peripheral surface, as shown in FIG. 2, naturally, kelp a, algae b, shellfish c and other marine organisms are well attached and breeding, and many fishes that feed on these marine organisms also inhabit, thus creating or improving the marine environment and improving the ecosystem. Conserved in the natural state.

The present invention can be widely applied to various marine facilities such as floating piers, oil breakwaters, fish reefs, etc., in addition to the illustrated floating breakwaters.

[0018]

According to the method for manufacturing an environment-friendly floating structure of the present invention, the following effects can be obtained. (1) Of the outer peripheral surface of the steel shell, a small amount of the outer peripheral surface below the water surface
Some Ku and also along the outer peripheral surface established the porous concrete formwork with a gap between the outer peripheral surface, normally a concrete between the steel shell and the porous concrete formwork And the steel shell, the ordinary concrete, and the porous concrete formwork are integrally connected to each other, so that marine organisms such as algae, kelp, shellfish and the like adhere well to the peripheral wall. Environment-friendly floating structure that enables the marine environment to be created or improved, and the marine ecosystem to be preserved in its natural state, by breeding and inhabiting many fishes. An object can be reliably obtained (claim 1). According to environmentally friendly floating structure of the present invention or, the following effects can be obtained. (2) Of the outer peripheral surface of the steel shell body, the outer peripheral surface below the water surface is small.
At least in part, through a normal concrete layer, because it has a porous concrete layer that forms the outer surface of the porous concrete, for example, marine organisms such as algae, kelp, shellfish, etc. adhere well to the surrounding wall and breed, In addition, a large number of fish can be inhabited, and the marine environment is created or improved, so that the marine ecosystem can be preserved in a natural state (claim 2). (3) are connected to each other has a plurality of浮函body to be anchored installed in waters at least part of the浮函body of the respective浮函bodies, steel shell which constitutes the浮函body Of the outer surface of the water
Since at least a part of the outer peripheral surface to be below the surface, through a normal concrete layer, is configured to have a porous concrete layer forming a porous concrete outer surface,
For example, marine organisms such as algae, kelp, shellfish and the like attach well to the surrounding wall and breed, and more fish can also inhabit, and the marine environment is created or improved over a wide range of sea areas, As a result, the marine ecosystem can be preserved in a natural state (claim 3).

[Brief description of the drawings]

1 is a transverse sectional view of the environmentally friendly floating construction according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part during use of the environment-friendly floating body structure according to the embodiment of FIG. 1;

FIG. 3 shows a process of manufacturing the environmentally friendly floating structure of FIG.
It is a transverse sectional view.

In Figure 4 environmentally friendly floating construction of FIG. 1 is a transverse sectional view showing a manufacturing process in different stages and Fig.

FIGS. 5 (1) to 5 (5) are views showing installation sea areas of the environmentally-friendly floating structure of FIG.
Is an explanatory views sequentially showing up stage of towed to.

FIG. 6 is a side view showing a state in which a plurality of floating bodies are connected to each other and moored in a sea area.

[7] Conventional floating structure is a transverse sectional view showing a state of being anchored installed in waters.

[Explanation of symbols]

 1,1 'Floating body 1A Steel shell 2,2' Steel plate 3,3 'Ordinary concrete layer 4,4' Stud dowel 5,5 'Horizontal rib 6,6' Vertical rib 7 Reinforcing bar 8 Mooring chain 10 Made of porous concrete Formwork 11 General formwork 12 Crane ship 13 Tugboat a Kelp b Algae c Shellfish g Seabed s Sea surface

────────────────────────────────────────────────── ─── Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B63B 5/14 B63B 9/06 B63B 22/00 B63B 35/00 B63B 35/34 B63B 35/38 B63B 35 / 44 A01K 61/00 317

Claims (3)

(57) [Claims] 1. An outer peripheral surface of a steel shell body below a water surface.
Along the outer peripheral surface at least a portion of the surface is placed a porous concrete formwork with a gap between the outer peripheral surface, normally a concrete between the steel shell and the porous concrete formwork Wherein the steel shell body, the ordinary concrete, and the porous concrete formwork are integrally connected to each other to form a structure. 2. The outer periphery of the outer peripheral surface of the steel shell body , which is below the water surface.
On at least part of the surface , usually through a concrete layer,
An environment-friendly floating structure, comprising a porous concrete layer forming an outer surface of the porous concrete. 3. A floating body having a plurality of floating bodies connected to each other and moored and installed in a sea area, wherein at least a part of the floating bodies of the floating bodies is a steel constituting the floating body. Outer surface of shell
An environment-friendly floating structure, characterized in that at least a part of the outer peripheral surface below the water surface has a porous concrete layer forming an outer surface of the porous concrete via a normal concrete layer. object.