JP3852679B2 - Method for manufacturing molded body for fishing ground facility - Google Patents

Method for manufacturing molded body for fishing ground facility Download PDF

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Publication number
JP3852679B2
JP3852679B2 JP2001294942A JP2001294942A JP3852679B2 JP 3852679 B2 JP3852679 B2 JP 3852679B2 JP 2001294942 A JP2001294942 A JP 2001294942A JP 2001294942 A JP2001294942 A JP 2001294942A JP 3852679 B2 JP3852679 B2 JP 3852679B2
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Prior art keywords
molded body
shell
inner cylinder
reef
molded
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JP2003092951A (en
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伸明 高橋
英夫 中村
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北栄建設株式会社
英夫 中村
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

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  • Artificial Fish Reefs (AREA)
  • Producing Shaped Articles From Materials (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、多毛類，小型甲殻類及び魚類のための魚礁・増殖礁などに好適な漁場施設用のコンクリート又はセラミックからなる成形体に関する。
【０００２】
【発明が解決しようとする課題】
近年、沿岸漁場での水産資源の保護育成を図るために漁場の整備が行われるようになってきている一方、廃棄物処理の問題からカキ類などの貝殻のリサイクルが要求されるようになってきており、カキ類の貝殻を魚礁や増殖礁としてリサイクル使用することが行われている。
【０００３】
このような魚礁・増殖礁にカキなどの貝殻を用いたものとしては、例えば、特開平６−１４１７２７号、特公平６−７７４９３号及び特開平７−２３６３８５号公報等に開示されているように網体にカキ等の貝殻を充填し、貝殻の隙間に多毛類，小型甲殻類等を繁殖させる増殖礁としての人工魚礁用集魚ケースがある。また、近年では、コンクリート製の魚礁ブロックと、鉄骨構造の魚礁枠体とで構成され、その魚礁枠体の上側にモルタル等で貝殻を固定した収容枠を配列して魚礁としての機能を向上させたハイブリッドタイプの人工魚礁も用いられている。
【０００４】
このように従来から魚礁・増殖礁にカキなどの貝殻を用いたものが種々提案されているが、特開平６−１４１７２７号、特公平６−７７４９３号及び特開平７−２３６３８５号公報等に開示される人工魚礁用集魚ケースは、単に通水性ケースにカキ殻を充填した構造であるため、重量が不足し、これを潮流が速い海域や波浪の大きな海域に設置した場合、早期に流されてしまい継続的に設置しておくことが困難である。また、予め所定の大きさの構造物として海中などに設置する構造のものでは、他の漁場施設用の用途に適用できず汎用性に劣るととともに、これらの魚礁・増殖礁は、コンクリートおよび鉄骨などから構成されるものであるので、ある程度の大きさ及び重量となり運搬にも不便であり、さらに、構造も複雑であるためコスト的にも高いという問題点もある。
【０００５】
本発明は上記課題に基いてなされたものであり、カキなどの貝殻のリサイクル使用が可能であり、簡単な構造で漁場施設用の種々の用途、特に漁礁・増殖礁用に好適であるとともに、強度的に優れた漁場施設用成形体の製造方法を提供することを目的とする。
【０００６】
【課題を解決するための手段】
本発明の請求項１記載の漁場施設用成形体の製造方法は、コンクリートによって中空状に形成した内筒体を成形するとともに、その内筒体を囲むようにして通水性を備えた円筒状の型枠を設け、この型枠と前記内筒体との間に貝殻を充填し、この貝殻にペースト状の固化剤を吹き付けて前記内筒体の外周縁を覆う外筒体を、前記貝殻が表面側に表れるように成形したものである。
【０００７】
これにより、中空状の成形体の表面に貝殻による複雑な凹凸部が形成され、さらに、各貝殻の隙間に多数の空洞部が形成されるので多孔質状となり、海藻類が着生したり多毛類,小型甲殻類等が繁殖し、これを捕食する有用魚類が成形体の周囲に効果的に蝟集させることができる。さらに、成形体は、中空状の内筒体の外周縁に貝殻を骨材として用いた外筒体で覆って形成されているから、表面に貝殻による複雑な凹凸部を有する成形体を簡単に成形することができる。
【０００８】
【発明の実施形態】
以下、本発明の第１実施例について図１乃至図５を参照して説明する。本実施例の漁場施設用成形体１は中空状の内筒体２と、この内筒体２の外周縁を覆う外筒体３とか成る多重構造である。内筒体２はコンクリートによって中空状に形成されている。外筒体３は貝殻４を骨材としてコンクリート５により接合することによって外筒体３の表面に多くの貝殻４が露出して凹凸部６が形成されるとともに、貝殻４の隙間に多数の空洞部７が形成されている。この各貝殻４間の空洞部７は、配列、形状、大きさ等に規則性がないため、この空洞部７は複雑に入り組んだ迷路状となり、海藻類が着生したり多毛類，小型甲殻類等が増殖したりしやすくなっている。
【０００９】
上述したような中空状の成形体１は、まず、通常の方法、すなわち、骨材として一般的な砂、砂利などとセメント、各種の配合剤を配合して攪拌した後、コンクリート型枠（図示しない）に充填して中空状の内筒体２を成形する。そして、図２に示すように、内筒体２の外周縁に、該内筒体２より径大な型枠10を配置する。この型枠10は金属製の網体で形成して通水性を備え、その内筒体２と型枠10の間に骨材としてカキの貝殻４を充填し、型枠10の外側から固化剤としてコンクリートペーストＰを吹き付ける。このコンクリートペーストＰを固化させることによって、内筒体２の外周縁を外筒体３で覆って内筒体２と外筒体３とを一体化する。これにより、成形体１は、その表面には多くの貝殻４が露出して凹凸部６が形成されるとともに、貝殻４の隙間による多数の空洞部７が形成された外筒体３が形成されているが、その内側に位置する内筒体２は、一般的なコンクリート型枠にコンクリートを充填した方法によって成形され、その内筒体２に貝殻４を骨材とする外筒体３を成形することから、成形体１の形成が容易である。さらに、内筒管２の外周縁に骨材として貝殻４とコンクリートから成る外筒体３で覆うことにより、成形体１の表面に貝殻４が露出し、成形体１の表面にも海藻類が着生したり多毛類,小型甲殻類等が増殖させることができ、魚礁・増殖礁としての機能に特に優れる。
【００１０】
次に本実施例の漁場施設用成形体１の利用方法について説明する。本実施例の漁場施設用成形体１は、適当な深さの海底に沈設することにより魚礁や増殖礁として使用することができる。この成形体１は中空円筒状であるので、この成形体１を複数積み重ねた魚礁・増殖礁に潮流が当接すると、種々の方向に輻射することで複雑な渦流域を形成し潮流Ｓが弱まることになる。そして、さらに、成形体１の表面及び裏面には、貝殻４による複雑な凹凸部６が形成され、さらに内部に形成される空洞部７によって凹凸部６の内部は、複雑に入り組んだ迷路状となっているため、多毛類、小型甲殻類等の生息に適した環境となり、これらが増殖する。また、外海の海底等に生長するホンダワラ、アラメ、カジメ等の大型褐藻類が成形体１に着生する。その結果、これらを餌料とするメバル類，タイ，カレイ，アイナメなど有用魚類の稚魚や未成魚などが周囲に蝟集し、これらの有用魚類の稚魚や未成魚を育成することができる。これらにより、魚類等の生息に好適なものとなっている。
【００１１】
このような本実施例の漁場施設用成形体１は、シンプルな構成であるので安価であるばかりか、成形体１を海底に所望の高さにまで積み上げるだけでよいので、海底が平坦である必要もなく設置場所の制限も少なく汎用性が向上したものとなっている。また、成形体１は、通常の方法で成形した内筒体２を成形し、その外周縁に貝殻４を骨材として用いた外筒体３で覆った多重構造とすることによって、成形体１のコンクリート強度を高めることができる。これにより、成形体１の耐久性が向上し、魚礁や増殖礁としての機能を長期に渡って安定的に維持することができる。
【００１２】
また、図３に示すようにＨ型鋼などの型鋼により複数の収納枠15Ａを有する棚枠15などを作成して、この棚枠15の収納枠15Ａに成形体１を収納することにより、所望の大きさの魚礁・増殖礁を簡単に製造することができる。さらに、図４に示すように、成形体１をスペーサブロック16を介して縦横交互に積み重ねことによって魚礁・増殖礁とすることもできる。このように、本実施例の漁場施設用成形体１は、それ自身積み重ねて魚礁・増殖礁とできるだけでなく、それぞれ単独で配置することにより魚礁・増殖礁とすることもでき、さらに、棚枠15やスペーサブロック16などに配置して所望の大きさの人工魚礁として用いることができる。
【００１３】
以上詳述したとおり本実施例の成形体１は、中空状の内筒体２を設け、この内筒体２の外周縁を貝殻４を骨材としたコンクリート又はセラミックからなる外筒体３で覆って表面に前記貝殻４による凹凸部６を有する中空状の成形体１を成形したものであるので、成形体１の表面に海藻類が着生したり多毛類,小型甲殻類等が繁殖したりしやすく、魚類が生育することができ魚礁・増殖礁として機能する。また、棚枠15やスペーサブロック16などと組み合わせて種々の大きさの魚礁・増殖礁とすることができるので、設置場所に応じた大きさの魚礁を簡単に製造することができ、汎用性に優れている。また、図５に示すように、コンクリート成形体１を海底21に山状に積み上げてマウント22とすることにより、人工的に湧昇流Ｓ１を起こし、海底部にある栄養塩を太陽光線が届く水深２０〜３０ｍまで上昇させ、植物性プランクトンの増殖を活性化させて海域の基礎生産力を増大させることができる。さらに、中空円筒状の成形体１を山状に積み上げることで湧昇流Ｓ１が起りやすくなっている。特に本実施例の成形体１は、骨材として貝殻４を用いているので、貝殻４からカルシウムをはじめ微量の各種ミネラルが溶出するので魚礁・増殖礁、あるいはマウント魚礁全体としては魚類の生育に特に好適なものとなっており、環境に対する影響もほとんどない。
【００１４】
さらに、本発明の成形体１の製造方法は、コンクリートによって中空状に形成した内筒体２を成形するとともに、その内筒体２を囲むようにして通水性を備えた円筒状の型枠10を設け、この型枠10と前記内筒体との間に貝殻４を充填し、この貝殻４にペースト状の固化剤を吹き付けて前記内筒体２の外周縁を覆う外筒体３を、前記貝殻４が表面側に表れるように成形したものであるから、成形体１の外周縁には貝殻４による複雑な凹凸部６が形成され、その上、各貝殻４間の隙間に多数に空洞部７が形成されているので成形体１が多孔質状となり、海藻類が着生したり多毛類，小型甲殻類等が増殖し、これを捕食する有用魚類が成形体１の周囲に効果的に蝟集させることができる。さらに、成形体１は、通常の方法で成形した内筒体２を成形し、その外周縁に貝殻４を骨材として用いた外筒体３で覆った多重構造とすることによって、成形体１の成形も容易である。
【００１５】
以上、本発明について前記各実施例に基づき説明したが、本発明は前記実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である。例えば前記実施例においては、コンクリート成形体の場合を例に説明してきたが、セラミックの場合にも同様に貝類４混合して焼成することにより適用可能である。さらに、コンクリートに限らず、モルタル、あるいはセメントペーストにも適用可能である。さらにまた、石膏に応用してもよい。また、前記実施例におては、円筒形状の成形体の場合について説明したが、四角筒状、多角筒状などであってもよい。さらに、骨材とて用いる貝殻はカキである必要はなく、ホタテ貝やアコヤ貝などのカキ以外の貝などに適用可能であることはいうまでもない。
【００１６】
【発明の効果】
本発明の請求項１記載の漁場施設用成形体の製造方法は、の製造方法は、コンクリートによって中空状に形成した内筒体を成形するとともに、その内筒体を囲むようにして通水性を備えた円筒状の型枠を設け、この型枠と前記内筒体との間に貝殻を充填し、この貝殻にペースト状の固化剤を吹き付けて前記内筒体の外周縁を覆う外筒体を、前記貝殻が表面側に表れるように成形したものであるから、中空状の成形体の表面に貝殻による複雑な凹凸部が形成され、さらに、各貝殻の隙間に多数の空洞部が形成されるので多孔質状となり、海藻類が着生したり多毛類,小型甲殻類等が繁殖し、これを捕食する有用魚類が成形体の周囲に効果的に蝟集させることができる。さらに、成形体は、中空状の内筒体の外周縁に貝殻を骨材として用いた外筒体で覆った多重構造とすることによって、成形体の成形加工が容易である。
【図面の簡単な説明】
【図１】本発明の一実施例を示す成形体の一部切欠斜視図である。
【図２】同上成形体の製造方法を示す断面図である。
【図３】同上成形体の使用方法を示す概略説明図である。
【図４】同上成形体の他の使用方法を示す概略説明図である。
【図５】同上成形体をマウント魚礁として用いた場合を示す概略説明図である。
【符号の説明】
１ 成形体（漁場施設用成形体）
２ 内筒体
３ 外筒体
４ 貝殻
５ コンクリート
６ 凹凸部
７ 空洞部
10 型枠
22 マウント魚礁
Ｐ コンクリートペースト（固化剤）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molded body made of concrete or ceramic for fishing ground facilities suitable for fish reefs and breeding reefs for polychaetes, small crustaceans and fish.
[0002]
[Problems to be solved by the invention]
In recent years, fishing grounds have been improved in order to protect and cultivate marine resources at coastal fishing grounds. On the other hand, recycling of shells such as oysters has been required due to waste disposal problems. The oyster shells are recycled for use as fish reefs and breeding reefs.
[0003]
Examples of such fish reefs and breeding reefs using shells such as oysters are disclosed in, for example, JP-A-6-141727, JP-B-6-77493, and JP-A-7-236385. There is an artificial reef collection case as a breeding reef that fills the net with shells such as oysters and breeds polychaetes, small crustaceans, etc. in the gaps between the shells. In recent years, a reef block made of concrete and a reef frame body with a steel structure have been constructed, and an accommodation frame with shells fixed with mortar etc. is arranged on the upper side of the reef frame body to improve the function as a fish reef. Hybrid type artificial reefs are also used.
[0004]
As described above, various types of shellfish such as oysters have been proposed for fish reefs and breeding reefs, but disclosed in JP-A-6-141727, JP-B-6-77493, JP-A-7-236385, and the like. The artificial fish reef collection case is a structure that simply fills the water-permeable case with oyster shells, so it lacks weight, and if it is installed in a sea area where the tide is fast or where there is a lot of waves, it will be washed away early. It is difficult to keep it installed continuously. In addition, a structure that is installed in the sea as a structure of a predetermined size in advance cannot be applied to other uses for fishing ground facilities and is inferior in versatility. These reefs and breeding reefs are made of concrete and steel frames. Therefore, there is a problem that it is inconvenient to carry due to a certain size and weight, and also has a high cost due to its complicated structure.
[0005]
The present invention has been made based on the above problems, and can be used for recycling shells such as oysters, and is suitable for various uses for fishing ground facilities with a simple structure, particularly for fishing reefs and breeding reefs. and to provide a manufacturing how the strength superior fisheries facilities for molding.
[0006]
[Means for Solving the Problems]
A method for manufacturing a molded body for a fishing ground facility according to claim 1 of the present invention is a method of forming an inner cylinder formed in a hollow shape with concrete and having a water permeability so as to surround the inner cylinder. A shell is filled between the mold and the inner cylinder, and a paste-like solidifying agent is sprayed on the shell to cover the outer periphery of the inner cylinder, and the shell is on the surface side. It was molded so as to appear in
[0007]
As a result, complex irregularities due to shells are formed on the surface of the hollow molded body, and a large number of cavities are formed in the gaps between the shells. , Breeding small crustaceans, etc., and useful fish that prey on them can be effectively collected around the compact. Furthermore, since the molded body is formed by covering the outer peripheral edge of the hollow inner cylindrical body with an outer cylindrical body using a shell as an aggregate, it is possible to easily form a molded body having a complicated uneven portion due to the shell on the surface. Can be molded.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. The molded body 1 for a fishing ground facility according to the present embodiment has a multiple structure including a hollow inner cylinder 2 and an outer cylinder 3 covering the outer peripheral edge of the inner cylinder 2. The inner cylinder 2 is formed in a hollow shape from concrete. The outer cylinder 3 has a shell 4 as an aggregate and is joined by concrete 5 to expose a large number of shells 4 on the surface of the outer cylinder 3 to form irregularities 6, and a number of cavities are formed in the gaps of the shell 4. Part 7 is formed. Since the hollow portions 7 between the shells 4 are not regular in arrangement, shape, size, etc., the hollow portions 7 have a complicated and complicated labyrinth shape, and seaweeds are settled, polychaetes, small shells. It has become easy to breed.
[0009]
The hollow molded body 1 as described above is first prepared by mixing an ordinary method, that is, a general sand, gravel, etc., cement, various compounding agents as an aggregate, and then a concrete mold (illustrated). No) is formed, and the hollow inner cylinder 2 is formed. Then, as shown in FIG. 2, a mold 10 having a larger diameter than the inner cylinder 2 is disposed on the outer peripheral edge of the inner cylinder 2. This mold 10 is formed of a metal net and has water permeability. Between the inner cylinder 2 and the mold 10, an oyster shell 4 is filled as an aggregate, and a solidifying agent is formed from the outside of the mold 10. Spray concrete paste P as follows. By solidifying the concrete paste P, the outer peripheral edge of the inner cylindrical body 2 is covered with the outer cylindrical body 3 so that the inner cylindrical body 2 and the outer cylindrical body 3 are integrated. As a result, the molded body 1 is formed with an outer cylindrical body 3 in which many shells 4 are exposed to form uneven portions 6 on the surface, and a large number of cavities 7 are formed by gaps between the shells 4. However, the inner cylinder 2 positioned inside is formed by a method in which concrete is filled in a general concrete formwork, and the outer cylinder 3 having the shell 4 as an aggregate is formed on the inner cylinder 2. Therefore, formation of the molded body 1 is easy. Further, the outer peripheral edge of the inner tube 2 is covered with an outer tube 3 made of a shell 4 and concrete as an aggregate so that the shell 4 is exposed on the surface of the molded body 1, and seaweeds are also formed on the surface of the molded body 1. It can grow and grow polychaetes, small crustaceans, etc., and is particularly excellent in functions as a fish reef and breeding reef.
[0010]
Next, the utilization method of the molded object 1 for fishery facilities of a present Example is demonstrated. The molded body 1 for a fishing ground facility according to the present embodiment can be used as a fish reef or a breeding reef by being laid on the seabed at an appropriate depth. Since this molded body 1 has a hollow cylindrical shape, when a tidal current comes into contact with a fish reef / growth reef in which a plurality of the molded bodies 1 are stacked, a complex swirl region is formed by radiating in various directions, and the current S is weakened. It will be. Further, a complex uneven portion 6 is formed on the front and back surfaces of the molded body 1 by the shell 4, and the inside of the uneven portion 6 is further complicated and complicated by a hollow portion 7 formed inside. Therefore, it becomes an environment suitable for the habitat of polychaetes, small crustaceans, etc., and these proliferate. In addition, large brown algae such as hondawala, arame, and scallop that grow on the seabed of the open sea, etc. grow on the molded body 1. As a result, larvae and immature fishes of useful fish such as mabals, Thailand, flounder, and sharks that use these as feeds are gathered around them, and larvae and immature fish of these useful fishes can be grown. These make it suitable for the inhabiting of fish and the like.
[0011]
Such a molded body 1 for a fishing ground facility according to the present embodiment is not only inexpensive because it has a simple configuration, but it is only necessary to stack the molded body 1 to a desired height on the seabed, so that the seabed is flat. It is not necessary and there are few restrictions on the installation location, improving versatility. Further, the molded body 1 has a multiple structure in which the inner cylinder 2 molded by a normal method is molded and the outer peripheral edge thereof is covered with the outer cylinder 3 using the shell 4 as an aggregate. The concrete strength can be increased. Thereby, durability of the molded object 1 improves and the function as a fish reef or a breeding reef can be stably maintained over a long term.
[0012]
Further, as shown in FIG. 3, a shelf frame 15 or the like having a plurality of storage frames 15A is made of a shape steel such as H-shaped steel, and the molded body 1 is stored in the storage frame 15A of the shelf frame 15 to obtain a desired shape. Large fish reefs and breeding reefs can be easily manufactured. Furthermore, as shown in FIG. 4, it is possible to obtain a fish reef / breeding reef by alternately stacking the molded bodies 1 vertically and horizontally via spacer blocks 16. As described above, the molded body 1 for a fishing ground facility according to the present embodiment can be used not only as a fish reef and a breeding reef, but also as a fish reef and a breeding reef. It can be used as an artificial fish reef of a desired size by being arranged on the 15 or the spacer block 16 or the like.
[0013]
As described above in detail, the molded body 1 of the present embodiment is provided with a hollow inner cylinder 2 and the outer periphery of the inner cylinder 2 is an outer cylinder 3 made of concrete or ceramic with a shell 4 as an aggregate. Since the hollow molded body 1 having the concavo-convex portion 6 formed by the shell 4 on the surface is formed, seaweeds are grown on the surface of the molded body 1, and polychaetes, small crustaceans, etc. are propagated. It is easy to grow and can grow fish and functions as a fish reef and breeding reef. In addition, because it can be combined with the shelf frame 15 and the spacer block 16 to make various sizes of reefs and breeding reefs, it is possible to easily manufacture reefs of sizes according to the installation location, making it versatile. Are better. In addition, as shown in FIG. 5, the concrete molded body 1 is piled up on the seabed 21 to form a mount 22, so that the upwelling flow S <b> 1 is artificially generated, and the sunlight reaches the nutrient salt on the seabed. The water depth can be increased to 20-30 m to increase the basic productivity of the sea area by activating the growth of phytoplankton. Furthermore, the upwelling flow S1 is likely to occur by stacking the hollow cylindrical shaped bodies 1 in a mountain shape. In particular, since the molded body 1 of the present embodiment uses the shell 4 as an aggregate, calcium and other trace amounts of various minerals are eluted from the shell 4, so that the fish reef and breeding reef, or the mount fish reef as a whole, can grow fish. It is particularly suitable and has little influence on the environment.
[0014]
Furthermore, the manufacturing method of the molded body 1 of the present invention is to mold the inner cylinder 2 formed in a hollow shape with concrete and to provide a cylindrical mold 10 having water permeability so as to surround the inner cylinder 2. The shell 10 is filled between the mold 10 and the inner cylinder, and the shell 4 is sprayed with a paste-like solidifying agent to cover the outer peripheral edge of the inner cylinder 2. 4 is formed so as to appear on the surface side, and therefore, a complex uneven portion 6 due to the shell 4 is formed on the outer peripheral edge of the molded body 1, and a large number of hollow portions 7 are formed in the gaps between the shells 4. The formed body 1 becomes porous, and seaweeds grow, polychaetes, small crustaceans, etc. proliferate, and useful fish that prey on them are collected around the molded body 1 effectively. Can be made. Further, the molded body 1 is formed by forming the inner cylinder 2 molded by a normal method and forming a multiple structure in which the outer peripheral edge thereof is covered with the outer cylinder 3 using the shell 4 as an aggregate. Is easy to mold.
[0015]
As mentioned above, although this invention was demonstrated based on each said Example, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention. For example, in the above embodiment, the case of a concrete molded body has been described as an example, but the case of ceramic can also be applied by mixing and firing shellfish 4 in the same manner. Furthermore, it is applicable not only to concrete but also to mortar or cement paste. Furthermore, it may be applied to gypsum. Moreover, in the said Example, although the case of the cylindrical molded object was demonstrated, square cylinder shape, polygonal cylinder shape, etc. may be sufficient. Furthermore, it is needless to say that the shell used as the aggregate need not be oysters, and can be applied to shells other than oysters such as scallops and pearl oysters.
[0016]
【The invention's effect】
The method for manufacturing a molded body for a fishing ground facility according to claim 1 of the present invention is characterized in that the manufacturing method includes forming an inner cylinder formed in a hollow shape with concrete and providing water permeability so as to surround the inner cylinder. A cylindrical mold is provided, a shell is filled between the mold and the inner cylinder, and a paste-like solidifying agent is sprayed on the shell to cover the outer periphery of the inner cylinder. Since the shell is molded so that it appears on the surface side, complex irregularities due to the shell are formed on the surface of the hollow molded body, and moreover, many cavities are formed in the gaps between the shells. It becomes porous, and seaweeds grow, polychaetes, small crustaceans, etc. breed, and useful fish that prey on them can be effectively collected around the compact. Furthermore, the molded body can be easily molded by forming a multi-layer structure in which the outer peripheral edge of the hollow inner cylindrical body is covered with an outer cylindrical body using a shell as an aggregate.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view of a molded body showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a method for producing the molded body.
FIG. 3 is a schematic explanatory view showing a method for using the molded body.
FIG. 4 is a schematic explanatory view showing another method of using the molded body.
FIG. 5 is a schematic explanatory view showing a case where the molded body is used as a mount fish reef.
[Explanation of symbols]
1 Molded body (fishery facility molded body)
2 Inner cylinder 3 Outer cylinder 4 Seashell 5 Concrete 6 Concavity and convexity 7 Cavity
10 formwork
22 Mount Reef P Concrete paste (solidifying agent)

Claims (1)

コンクリートによって中空状に形成した内筒体を成形するとともに、その内筒体を囲むようにして通水性を備えた円筒状の型枠を設け、この型枠と前記内筒体との間に貝殻を充填し、この貝殻にペースト状の固化剤を吹き付けて前記内筒体の外周縁を覆う外筒体を、前記貝殻が表面側に表れるように成形したことを特徴とする漁場施設用成形体の製造方法。An inner cylinder formed into a hollow shape with concrete is molded, and a cylindrical mold having water permeability is provided so as to surround the inner cylinder, and a shell is filled between the mold and the inner cylinder. And manufacturing a molded body for a fishing ground facility, wherein an outer cylinder covering the outer peripheral edge of the inner cylinder by spraying a paste-like solidifying agent on the shell is molded so that the shell appears on the surface side. Method.
JP2001294942A 2001-09-26 2001-09-26 Method for manufacturing molded body for fishing ground facility Expired - Fee Related JP3852679B2 (en)

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JP2019093702A (en) * 2017-11-21 2019-06-20 株式会社Ｈｐｃ沖縄 Production method of concrete structure in sea
CN111302727B (en) * 2019-12-02 2021-12-24 哈尔滨工程大学 Underwater ecological restoration method for service breakwater
CN111268961B (en) * 2019-12-02 2021-12-24 哈尔滨工程大学 Cement concrete oyster attachment base with rough surface and preparation method thereof
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JPS5699736A (en) * 1980-01-14 1981-08-11 Nippon Steel Corp Fish bank and method
JPS60177771U (en) * 1984-05-02 1985-11-26 北栄建設株式会社 artificial reef
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