JP2897634B2 - Concrete hollow block - Google Patents
Concrete hollow blockInfo
- Publication number
- JP2897634B2 JP2897634B2 JP6008782A JP878294A JP2897634B2 JP 2897634 B2 JP2897634 B2 JP 2897634B2 JP 6008782 A JP6008782 A JP 6008782A JP 878294 A JP878294 A JP 878294A JP 2897634 B2 JP2897634 B2 JP 2897634B2
- Authority
- JP
- Japan
- Prior art keywords
- sand
- hollow block
- eelgrass
- seeds
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Artificial Fish Reefs (AREA)
- Cultivation Of Seaweed (AREA)
- Pretreatment Of Seeds And Plants (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、アマモに代表される海
中種子植物の繁殖に好適なコンクリート製中空ブロック
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete hollow block suitable for propagation of marine seed plants represented by eelgrass.
【0002】[0002]
【発明の背景】海中種子植物として代表的なアマモ、コ
アマモなどのアマモ類は浅い海の砂地地盤に生育する稲
に似た植物であり、地下茎や種子によって増殖し、砂中
に根をはることにより砂の浸蝕を防止する。また、この
アマモ類の群生地は各種魚介類の産卵場所や稚魚の育成
場所となっており、海洋牧草地としての重要な機能を担
っている。Background of the Invention Eelgrass, such as eelgrass and eelgrass, which are typical marine seed plants, is a rice-like plant that grows on a sandy ground in a shallow sea, proliferates by rhizomes and seeds, and roots in the sand. This prevents sand erosion. In addition, the colony of eelgrass is a spawning place for various fish and shellfish and a fostering place for fry, and plays an important function as a marine pasture.
【0003】その一方で、アマモ類やその他の海中種子
植物の群生地は魚網などによる刈り取り被害や、漂砂変
化による砂の流出によって減少しており、漁獲高の減少
や砂の流出による海蝕の原因の一つとなっていた。On the other hand, colonies of eelgrass and other marine seed plants are decreasing due to cutting damage by fish nets and sand runoff due to changes in drifting sand, and the cause of erosion due to a decrease in fish catch and sand runoff. Had become one of.
【0004】[0004]
【発明が解決しようとする課題】このため最近では、こ
のアマモ類やその他の海中種子植物を人工的に育成して
再繁殖を図る実験が行われている。この方法は、アマモ
類等の海中種子植物の種子を海底砂地面に活着させるこ
とであるが、根の張らない初期段階で砂が移動すると根
付かないため、特に海流や潮流等の流れが激しい場所で
は思うような繁殖効果を得られなかった。Therefore, recently, experiments have been conducted to artificially grow the eelgrass and other marine seed plants to reproduce them. This method is to activate the seeds of marine seed plants such as eelgrass on the seabed sand surface.However, since the sand does not take root in the early stage when roots do not grow, it does not take root, especially in places with strong currents such as ocean currents and tidal currents. I couldn't get the breeding effect I wanted.
【0005】つまり、繁殖を確実にするには、いかに砂
地の流失や移動を防止するかにかかっており、従来では
繊維製の袋に砂と種子を詰めてマット状に展開したり、
育成地全体を魚網で囲うなどの方法が試みられている
が、決定的な対策ではなく、またこのような実験的規模
では、特に繁殖地の大規模造成には不向きであった。[0005] In other words, in order to ensure breeding, it depends on how to prevent the erosion and movement of the sand. Conventionally, sand and seeds are packed in a fiber bag and developed in a mat shape.
Attempts have been made to enclose the entire breeding ground with a fish net, but this is not a definitive measure and such an experimental scale is not suitable for large-scale development of breeding grounds.
【0006】また、鉄枠やコンクリート枠に取り付けた
二重のモジ網内に種子を収容し、これを海底面に沈設す
ることによりアマモ類の繁殖を図ったものも提案されて
いるが、鉄枠やコンクリート枠にモジ網を取り付ける作
業に手間がかかるため、特に繁殖地の大規模造成には不
都合であった。[0006] In addition, there has been proposed a type in which seeds are accommodated in a double mossy net attached to an iron frame or a concrete frame, and the seeds are buried on the sea floor for propagation of eelgrass. Since it takes time and effort to attach a moji net to a frame or a concrete frame, it is inconvenient especially for large-scale development of a breeding ground.
【0007】本発明は係る背景に基づきなされたもので
あり、アマモ類等の海中種子植物の繁殖地を容易に造成
することができるとともに、特に、大規模の繁殖地の造
成にも適した海中種子植物の育成用構造体としてのコン
クリート製中空ブロックを提供することを目的としてい
る。The present invention has been made on the basis of the above background, and it is possible to easily create a breeding ground for marine seed plants such as eelgrass, and in particular, it is suitable for forming a large-scale breeding ground. Kon as a structure for growing medium seed plants
It is intended to provide a cleat hollow block .
【0008】[0008]
【課題を解決するための手段】前記目的を達成するた
め、本発明は、海底面に敷き並べられるコンクリート製
中空ブロックであって、砂及び該砂中に配設された海中
種子植物の種子を保持するための上下に貫通する収容開
口を備えてなることを特徴とするものである。To achieve the above object, according to an aspect of the present onset Ming, a concrete hollow blocks are arranged spread on the seabed, sand and sea are disposed in sand Nakatane plant seeds Up and down penetrating storage opening to hold
It is characterized by having a mouth .
【0009】また本発明では、周縁部分から立設する柵
部材を有することが好ましい。[0009] In the present invention preferably has a fence member erected from the circumferential edge portion.
【0010】なお、前記中空ブロックの外形寸法は、設
置される海域の波や海流、潮流等の流れの強さ、組立,
運搬などの便宜等を鑑みて適宜設計されるものである。[0010] The external dimensions of the hollow block are determined by the strength of the flow of waves, currents, tides, and the like in the sea area in which the hollow block is installed, assembling, and the like.
It is appropriately designed in consideration of the convenience of transportation and the like.
【0011】また前記柵部材は、前記中空ブロックの周
縁部分に例えば鉄筋や人工繊維などを林立させて設ける
ことができる。なお、この柵部材は、必ずしも、海底面
に敷き並べられるすべて中空ブロックの周縁部分に設け
る必要はない。[0011] The fence member may be provided in a peripheral portion of the hollow block by, for example, arranging a reinforcing bar or artificial fiber. Incidentally, the fence member is not necessarily, seafloor
It is not necessary to provide at the peripheral portion of all the hollow blocks laid in the space .
【0012】[0012]
【作用】以上の構成にあっては、中空ブロックを海底面
に沈設し、順次敷き並べるだけで、海底地盤の凹凸に対
応しつつその敷設個数に応じた面積,形状の造成地が確
保され、その後各中空ブロックの収容開口内に砂を充填
するとともに砂の中に種子植物の種子を配設することに
より海中種子植物の造成地が完成する。種子を配設した
砂は、中空ブロックに囲われた収容開口内に充填されて
いるため、海流、潮流等の流れや波による散逸が防止さ
れ、アマモ類等の海中種子植物の種子の発芽、発根、根
張り定着が促進される。[Function] In the above construction, simply laying the hollow blocks on the sea floor and laying them down one by one will secure the area and the shape of the land according to the number of laying, corresponding to the unevenness of the seabed, Thereafter, sand is filled into the accommodation opening of each hollow block, and seeds of seed plants are arranged in the sand, thereby completing the land where undersea seed plants are formed. Since the sand in which the seeds are arranged is filled in the storage opening surrounded by the hollow block, the current and the current such as the tidal current and the waves are prevented from being dissipated, and the germination of seeds of marine seed plants such as eelgrass, Rooting and rooting are promoted.
【0013】また、中空ブロックの周縁部分に柵部材を
設けた場合には、中空ブロック上を通過する海流、潮流
等の流れや波のエネルギーを減少してさらに砂の散逸防
止効果が向上する。Further, when a fence member is provided on the peripheral portion of the hollow block, the energy of the current and waves, such as the ocean current and the tidal current, passing over the hollow block is reduced, and the effect of preventing the dissipation of the sand is further improved.
【0014】[0014]
【実施例】以下、本発明の一実施例を図面を用いて詳細
に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.
【0015】図1,2はこの発明に係る海中種子植物と
してのアマモ類を育成する構造体であるコンクリート製
中空ブロックの全体を示すものであり、この中空ブロッ
クは、アマモの繁殖地の造成区画Aにおいて、作業船を
通じて、海底地盤E上に開口面を上にして沈設され、多
数敷き並べられたコンクリート製の中空ブロック1の上
下に貫通する収容開口4aに砂2と、この砂の中に配設
したアマモやコアマモ等のアマモ類の種子とが充填され
てなっている。FIGS. 1 and 2 show a concrete structure which is a structure for growing eelgrass as a marine seed plant according to the present invention.
Denote whole hollow blocks, hollow blocks
In the development section A of the eelgrass breeding ground, a workboat is laid down on the seabed ground E with an open surface through a workboat, and a large number of concrete hollow blocks 1 are laid.
The storage opening 4a penetrating below is filled with the sand 2 and the seeds of eelgrass such as eelgrass and eelgrass arranged in the sand.
Has become.
【0016】各中空ブロック1は、造成区画Aに繁殖地
を育成するための最少単位を構成するもので、田の字形
をなして成形されたプレキャスト鉄筋コンクリートであ
って、図3に示すように、所定高さ、例えば50cm程
度の高さ及び所定の平面寸法、例えば縦横2.4m程度
の平面寸法を有する枠部3と、枠部3の内側に十字形に
交差して一体化され、枠部3の内側を4つの収容開口4
aに区画する仕切り壁4とを備えたものである。Each hollow block 1 constitutes a minimum unit for breeding a breeding ground in the development section A, and is a precast reinforced concrete formed in the shape of a rice field, as shown in FIG. A frame portion 3 having a predetermined height, for example, a height of about 50 cm and a predetermined plane size, for example, about 2.4 m in length and width, and being integrated into the inside of the frame portion 3 in a cross-shaped manner, The inside of 3 has four accommodation openings 4
and a partition wall 4 for partitioning into a.
【0017】また中空ブロック1の周縁部分としての前
記枠部2の上面には、例えば内部配筋された鉄筋5に接
合された多数の鉄筋6aが林立状態に突設され、これに
より中空ブロック1の上部周縁を包囲する櫛状の防護柵
6を形成している。なお、この防護柵6に加えその周囲
に魚網などを被せておいてもよい。また、多数の鉄筋6
aに換えて、人口繊維、例えばポリプロピレン、漁網等
の網状体等を林立することもできる。On the upper surface of the frame portion 2 as a peripheral portion of the hollow block 1, for example, a number of reinforcing bars 6a joined to the reinforcing bars 5 arranged inside are protruded in a forested state. Is formed to form a comb-shaped protective fence 6 surrounding the upper edge of the protective fence. In addition to the protective fence 6, a fishnet or the like may be placed around the protective fence 6. In addition, many rebars 6
Instead of a, artificial fibers, for example, polypropylene, nets such as fishing nets, etc., can also be established.
【0018】各中空ブロック1の外形や高さ寸法は、設
置海域の海流、潮流等の流れや波の強さなどの調査結果
に応じて定められるもので、波や流れによる洗堀や移動
を防護するために必要とする最小寸法であって、しかも
組立,運搬などの取扱に支障のない重さに応じた最大寸
法に設定することが好ましい。また中空ブロック1の製
作方法は、型枠内部に鉄筋を配筋し、コンクリートを打
設し、固化後脱型する作業の単純な繰返しなので、工場
で製作しトラックなどで現場海域近くまで運搬すること
も出来るし、作業基地等を設けて製作することが出来る
ほか、作業船上でも製作でき、設備や機材の有無などに
応じて最も都合の良い方法を選択できる。また、サンド
トラップと同様に数個のブロックを陸上で連結し、施工
性を高めることもできる。The outer shape and height of each hollow block 1 are determined in accordance with the results of surveys on the current of the installation sea area, such as currents and tides, and the strength of waves. It is preferable to set the minimum size required for protection and the maximum size according to the weight that does not hinder handling such as assembly and transportation. The method of manufacturing the hollow block 1 is a simple repetition of a process of arranging reinforcing steel inside the formwork, placing concrete, and solidifying and removing the mold. Therefore, the hollow block 1 is manufactured at a factory and transported by truck or the like to near the site sea area by truck. It can be manufactured by providing a work base or the like, and can also be manufactured on a work boat, and the most convenient method can be selected according to the presence or absence of equipment and equipment. Also, like the sand trap, several blocks can be connected on land to improve workability.
【0019】以上の中空ブロックは、図2に示すよう
に、作業船7から中空ブロック1を吊下ろし、海底地盤
Eの表面に沈設する作業を次々に繰返して、中空ブロッ
ク1を造成区画A全体に縦横に敷き並べる。このとき海
底地盤Eの地表面に凹凸があっても個々の中空ブロック
1の面積は造成区画Aの全体に比べて小さいので、凹凸
に追随して敷き並べることができ、その設置個数や配置
に応じた造成面積や全体形状が確保される。[0019] or more hollow blocks, as shown in FIG. 2, down hanging hollow block 1 from the work ship 7, repeatedly one after another the task of sinking to the surface of the seabed E, the entire reclamation compartment A hollow block 1 Lay them vertically and horizontally. At this time, even if there are irregularities on the ground surface of the seafloor ground E, the area of each hollow block 1 is smaller than that of the entire development section A, so that the hollow blocks 1 can be laid out following the irregularities. A corresponding creation area and overall shape are secured.
【0020】次に、アマモやコアマモ等のアマモ類の種
子の育成用の砂2をサンドポンプなどを通じて造成区画
Aの各中空ブロック1上に撒き出して、収容開口4a内
に充填する。Next, sand 2 for growing eelgrass seeds such as eelgrass and koagu is spouted onto each hollow block 1 of the development section A through a sand pump or the like, and filled in the accommodation opening 4a.
【0021】砂2は、撒き出された段階で山積み状態や
不均一が生じても、海流や波の移動に応じて収容開口4
aや隣り合う中空ブロック1間の隙間に移動して平均に
充填され、それ以上の散逸がなく、各収容開口4a内或
いは中空ブロック1間の隙間に固定された状態を維持す
る。また、中空ブロック1の周縁部分には防護柵6が設
けられているので、中空ブロック1を通過する海流や波
がこれに衝突してそのエネルギーを減少し、これによっ
てさらに砂の散逸防止効果が向上する。なお、かかる防
護柵6は、必ずしも、すべての中空ブロック1に設ける
必要はなく、例えば、略半数の中空ブロック1の四面に
防護柵6を設け、防護柵6を設けたものと設けないもの
とを、縦横に交互に敷き並べることにより、各々の中空
ブロック1の周囲を囲んで防護柵6が設けられることに
なる。[0021] Even if the sand 2 is piled up and uneven at the stage of being scattered, the storage opening 4 is accommodated in accordance with the movement of ocean currents and waves.
a and the gap between the adjacent hollow blocks 1 is filled to an average, and there is no further dissipation, and the state is fixed in each of the accommodation openings 4a or in the gap between the hollow blocks 1. Further, since the protective fence 6 is provided on the peripheral portion of the hollow block 1 , the current and the waves passing through the hollow block 1 collide with the protective fence and reduce its energy, thereby further preventing the sand from being dissipated. improves. The protective fences 6 do not necessarily need to be provided on all the hollow blocks 1. For example, the protective fences 6 are provided on four sides of approximately half of the hollow blocks 1 , and the protective fences 6 are not provided. Are laid alternately vertically and horizontally, so that a protective fence 6 is provided around each hollow block 1 .
【0022】そして、収容開口内に充填された砂2に
は、人力で植え付けることによりアマモの種子を配設す
る。なお、予め砂中にアマモ類の種子を充填し、当該種
子をサンドポンプを通して、砂とともに各中空ブロック
上に撒き出しもよい。[0022] Then, the sand 2 filled in the housing opening, Ru <br/> be disposed seeds eelgrass by planting by human power. Note that eelgrass seeds may be filled in the sand in advance, and the seeds may be scattered together with the sand onto each hollow block through a sand pump.
【0023】そして、かかる中空ブロックによれば、収
容開口4a内に充填されたアマモ類の種子が配設された
砂は、流れや波による移動が防止されるので、所定期間
放置しておく間に、アマモやコアマモ等の種子は所定の
生存率で順次発芽し、発根とともに成長を開始し、根張
りにより砂2の内部に活着し、これの浸蝕を防止しつつ
中空ブロックの上部全面に群生することになる。[0023] Then, according to the hollow blocks, sand seeds of eelgrass class filled in the accommodating opening 4a is disposed, since the movement caused by the flow and wave is prevented, if left between Tokoro regular In the meantime, seeds such as eelgrass and eelgrass germinate sequentially at a predetermined survival rate, start growing together with rooting, take root in the sand 2 by rooting, and prevent erosion of the seeds.
It grows on the entire upper surface of the hollow block .
【0024】なお、防護柵6を構成する多数の鉄筋6a
や魚網などは、各中空ブロック1を海底に沈設してから
は所定時間が経過した後は腐朽する場合があるが、種子
が発芽し、根張りするまでの約半年位の生育期間だけ林
立状態を保てば良い。A large number of reinforcing bars 6a constituting the protective fence 6
And fish nets may decay after a certain period of time after each hollow block 1 has been submerged on the seabed, but only in the growing period of about half a year until seeds germinate and take root. Just keep it.
【0025】また、前記実施例では中空ブロックを田の
字形に形成したが、その外形や仕切り形状は適宜設計に
より変更することができる。In the above embodiment, the hollow block is formed in the shape of a cross, but the outer shape and the partition shape can be appropriately changed by design.
【0026】[0026]
【発明の効果】以上詳細に説明したように、この発明に
係るコンクリート製中空ブロックにあっては、これを作
業船上から海底面に沈設し、順次敷き並べることによ
り、海底地盤の凹凸に対応しつつその敷設個数に応じた
面積,形状の造成地が確保され、次いで各中空ブロック
の収容開口内に砂を充填するとともに砂の中に種子植物
の種子を配設することにより海中種子植物の繁殖地を容
易に造成することができるとともに、特に、大規模の繁
殖地をも容易に造成することができる。As has been detailed description, according to the present invention, in the concrete hollow blocks according to the present invention, which was sinking into the seabed from the work ship, by arranging sequentially laying, corresponding to the irregularities of the seabed In addition, land with an area and a shape corresponding to the number of laying is secured, and then the sand is filled in the accommodation opening of each hollow block and seeds of seed plants are laid in the sand to breed undersea seed plants. The land can be easily created, and particularly, a large-scale breeding ground can be easily created.
【0027】また、中空ブロックの周縁部分に柵部材を
設ければ、中空ブロック上を通過する海流や波のエネル
ギーを減少してさらに砂の散逸防止効果を向上し、海中
種子植物の生存率を向上させることができる。If a fence member is provided on the peripheral portion of the hollow block, the energy of the ocean current and waves passing over the hollow block is reduced, the effect of preventing sand from dissipating is further improved, and the survival rate of the marine seed plants is improved. Can be improved.
【図1】この発明の一実施例にかかるコンクリート製中
空ブロックの全体構成を示す平面図である。FIG. 1 is a diagram illustrating a concrete manufacturing method according to an embodiment of the present invention.
It is a top view which shows the whole structure of an empty block .
【図2】同ブロックの断面図である。FIG. 2 is a sectional view of the same block .
【図3】各中空ブロックの構成を示す一部破断斜視図で
ある。FIG. 3 is a partially broken perspective view showing a configuration of each hollow block.
1 コンクリート製中空ブロック 2 砂 3 枠部 4 仕切り壁 4a 収容開口 6 防護柵 DESCRIPTION OF SYMBOLS 1 Hollow block made of concrete 2 Sand 3 Frame part 4 Partition wall 4a Housing opening 6 Protective fence
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−138124(JP,A) 特開 平2−109922(JP,A) 特開 昭58−224626(JP,A) 実開 昭58−29263(JP,U) 実開 昭62−181152(JP,U) 実開 平2−138557(JP,U) (58)調査した分野(Int.Cl.6,DB名) A01G 33/00 - 33/02 102 A01K 61/00 311 - 321 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-138124 (JP, A) JP-A-2-109922 (JP, A) JP-A-58-224626 (JP, A) 29263 (JP, U) JP-A 62-181152 (JP, U) JP-A 2-138557 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) A01G 33/00-33 / 02 102 A01K 61/00 311-321
Claims (2)
中空ブロックであって、砂及び該砂中に配設された海中
種子植物の種子を保持するための上下に貫通する収容開
口を備えてなることを特徴とするコンクリート製中空ブ
ロック。1. A concrete hollow block laid on a sea bottom, which penetrates up and down to hold sand and seeds of a marine seed plant disposed in the sand.
Hollow concrete block characterized by having a mouth
Lock .
とを特徴とする請求項1に記載のコンクリート製中空ブ
ロック。2. A concrete hollow Bed according to claim 1, characterized in that it comprises a fence member erected from the circumferential edge portion
Lock .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6008782A JP2897634B2 (en) | 1994-01-28 | 1994-01-28 | Concrete hollow block |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6008782A JP2897634B2 (en) | 1994-01-28 | 1994-01-28 | Concrete hollow block |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07213189A JPH07213189A (en) | 1995-08-15 |
JP2897634B2 true JP2897634B2 (en) | 1999-05-31 |
Family
ID=11702452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6008782A Expired - Fee Related JP2897634B2 (en) | 1994-01-28 | 1994-01-28 | Concrete hollow block |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2897634B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7587858B2 (en) | 2005-08-11 | 2009-09-15 | Roy E. Hock | Method and apparatus for cultivation of subaquatic vegetation |
CN102388731A (en) * | 2011-07-09 | 2012-03-28 | 中国海洋大学 | Terrace shaped propagation reef for aquatic organism resources and manufacturing method thereof |
CN103081794A (en) * | 2011-11-02 | 2013-05-08 | 中国海洋大学 | Artificial algal reef for algae adhesion and seaweed transplantation |
JP6268637B2 (en) * | 2014-01-17 | 2018-01-31 | 鹿島建設株式会社 | Underwater structure, bottom sediment improvement method, and amamo field construction method |
-
1994
- 1994-01-28 JP JP6008782A patent/JP2897634B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH07213189A (en) | 1995-08-15 |
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