JP2600542Y2 - River zoning block structure - Google Patents
River zoning block structureInfo
- Publication number
- JP2600542Y2 JP2600542Y2 JP1992086262U JP8626292U JP2600542Y2 JP 2600542 Y2 JP2600542 Y2 JP 2600542Y2 JP 1992086262 U JP1992086262 U JP 1992086262U JP 8626292 U JP8626292 U JP 8626292U JP 2600542 Y2 JP2600542 Y2 JP 2600542Y2
- Authority
- JP
- Japan
- Prior art keywords
- stone
- river
- natural
- block
- zoning
- 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 - Lifetime
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Description
【0001】[0001]
【産業上の利用分野】本考案は河床に施す帯工石材に係
り、特に河川環境を良好に維持できる帯工ブロックに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bandwork stone material applied to a riverbed, and more particularly to a bandwork block capable of maintaining a good river environment.
【0002】[0002]
【従来の技術】河川の勾配が急な箇所は、そのまま放置
すると河床が洗掘あるいは侵食され、生態系が崩れたり
有効な河川利用が困難になる場合がある。そこで河床勾
配が急な箇所には、従来より帯工や落差工を施し、流勢
調節を図っている。2. Description of the Related Art In a place where a river has a steep gradient, if left as it is, the riverbed may be scoured or eroded, and the ecosystem may be disrupted or effective use of the river may be difficult. Therefore, in areas where the riverbed slope is steep, zoning and head works are used to control the flow.
【0003】帯工や落差工は、その施工目的や経済条件
によって各種のタイプがあるが、基本的には何らかの人
工物を河床に配し、せき上げ又は段差を設ける。具体的
には図5に示すように、河川1の流れに対して直角方向
に帯工(落差工)2を施すのが一般であって、その構成
は同図(a)に示すように、コンクリート帯3を配設す
るもの、或いは同図(b)のようにコンクリート打ちし
た基礎4に自然石5を埋設するもの、同図(c)のよう
に落差の上下部分をコンクリート6で固めたもの等があ
る。[0003] There are various types of zoning works and head works depending on the construction purpose and economic conditions. Basically, some artificial material is arranged on a riverbed to provide a lift or a step. Specifically, as shown in FIG. 5, a zoning (head drop) 2 is generally performed in a direction perpendicular to the flow of the river 1, and the configuration thereof is as shown in FIG. One in which a concrete band 3 is provided, one in which a natural stone 5 is buried in a concrete-poured foundation 4 as shown in FIG. 3B, and upper and lower portions of a head are solidified with concrete 6 as in FIG. There are things.
【0004】[0004]
【考案が解決しようとする課題】ところで、このような
コンクリート帯工は、河床全体をコンクリートで覆う必
要性から、第一に施工コストが嵩み、第二に河川の自然
バランスに好ましくない影響を与える。[Problems to be Solved by the Invention] However, such a concrete strip works has a problem that the construction cost is increased firstly and the unfavorable influence on the natural balance of the river is required due to the necessity of covering the entire riverbed with concrete. give.
【0005】まずコストの点についていうと、コンクリ
ート帯工は設計計算が煩雑であるうえ、型枠組みなど煩
雑な作業を要するため作業人員も多数必要で、工期も延
びるなど諸種の問題が複合する結果として現れる。First, in terms of cost, concrete band work is complicated in design calculation, and requires complicated work such as a formwork, so that a large number of workers are required, and various problems such as an increase in the construction period are compounded. Appear as.
【0006】他方、コンクリート帯工(落差工)による
自然への影響は、概略次の通りである。第一に、コンク
リートからは石灰分など生態系に好ましくないアクが滲
み出ることが知られているが、従来の帯工(落差工)で
は河川水とコンクリートとの接触面積が大きく、比較的
短期のうちに多くの不良成分が河川に流れ出ることにな
って生態系のバランスが壊れ易い。第二に、従来の河川
工は単純にコンクリートを配するため表面が平坦とな
る。ところが河川は単なる水路ではなく、自然の自浄作
用を営む。自然の自浄作用は、淵のくぼみや小石の凹凸
による水流の泡立ちにより空気中から酸素を導入するこ
とによって達成されるが、平坦なコンクリート表面では
河川流水が泡立つこともなく、流勢も単調となって酸素
の取り入れや十分な撹拌作用が営まれず、河川の自浄作
用が弱められ、自然のバランスが歪められる。尚、落差
工では酸素の導入はできるが、遡上する魚の進路が遮ら
れ、生態エリアが狭められる等の問題を抱える。[0006] On the other hand, the effect on the nature by the concrete strip work (fall work) is roughly as follows. First, it is known that undesired lime such as lime oozes out of concrete from ecosystems. However, conventional zoning (fall works) has a large contact area between river water and concrete, and is relatively short-term. In the meantime, many bad components will flow into rivers and the balance of the ecosystem will be easily broken. Secondly, conventional river works have a flat surface because they simply place concrete. However, rivers are not just waterways, they carry out natural self-purification. The natural self-cleaning action is achieved by introducing oxygen from the air by bubbling of the water flow due to depressions and unevenness of pebbles. As a result, the intake of oxygen and insufficient agitation do not work, weakening the self-cleansing action of the river and distorting the natural balance. Oxygen can be introduced in the head work, but there are problems such as the obstruction of the course of fish going up and the ecological area being narrowed.
【0007】そこで本考案の目的は帯工(落差工)本来
の目的を達成する際に、自然生態への影響を解消し、ま
たコストを最小限に抑える点にある。[0007] Therefore, an object of the present invention is to eliminate the influence on natural ecology and to minimize the cost when achieving the original purpose of the zoning (head construction).
【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、本考案に係る帯工ブロック構造は、自然石を用いた
自重1〜5トンの帯工石材に小径貫通孔を穿設し、各石
に穿設した貫通孔の開口点を揃えつつ少なくとも5個以
上の帯工石材をアーチ状に湾曲させ、当該湾曲部は、ア
ーチ状突出面を上流に向けて配設する一方、前記貫通孔
に可撓性の索条手段を挿通させ、該索条手段の両端部を
帯工石材の両端部の石材に座金およびクリップを介して
固定する。In order to solve the problems] because that forms us the purpose, band Engineering block structure according to the present invention is, using natural stone
A small diameter through-hole is drilled in a stone work material with a weight of 1 to 5 tons , and at least five or more holes are aligned with the through-holes drilled in each stone.
The strip Engineering stone material of the upper is curved in an arch shape, the curved portion, A
While the arbor- shaped protruding surface is disposed upstream, flexible cable means is inserted through the through hole, and both ends of the cable means are fixed to the stone material at both ends of the bandwork stone with a washer and a clip. Through
Fix it .
【0009】[0009]
【作用】本考案に係る帯工ブロックは、所定重量を有す
る多数の帯工石材をアーチ状に並列させ、穿設孔にワイ
ヤロープ等の索条手段を通して堅縛し、相互に連結させ
る。石材の形状は任意であり隣合う石材同士の間に隙間
が生じても構わない。In the banding block according to the present invention, a large number of banding stones having a predetermined weight are arranged in an arch shape, and are fixed to the perforated hole through a rope means such as a wire rope and connected to each other. The shape of the stones is arbitrary, and a gap may be formed between adjacent stones.
【0010】かかる帯工ブロックは、湾曲させた突出頂
点を流れに対向させて配置する。このブロックは、それ
ぞれの石材を単独で配設した場合に較べて全体の重量が
増すから洗掘や流勢に対してより強く対抗することが可
能となるとともに、アーチ状に連結させたため構造強度
が向上し、強い流勢に対しても強く対抗することが可能
となる。またブロックには各石の間に隙間が生ずるが、
この部分には流れてきた砂利や砂が入り込み、自然に強
度が向上する。また、隙間があることによって流れに従
順となり、また遡上した魚に対して進路を与えることが
出来る。また自然の場合と同様、河川水が泡立って大気
中の酸素を河川に導入し、流水を適度に撹拌して自然に
近い流れを作り上げる。[0010] In such a banding block, a curved protruding vertex is disposed so as to face the flow. This block has a greater overall weight compared to the case where each piece of stone is placed alone, making it possible to counteract scouring and currents more strongly. And strong opposition to strong currents can be achieved. Also, there is a gap between each stone in the block,
Gravel and sand that have flowed in enter this part, and the strength naturally increases. In addition, the presence of the gap makes the fish compliant with the flow, and can provide a course for fish that have gone upstream. Also, as in the case of nature, river water bubbles and introduces oxygen in the atmosphere into the river, and the flowing water is agitated appropriately to create a flow close to nature.
【0011】[0011]
【実施例】以下、添付図面に基づいて本考案の実施例を
説明する。図1〜図4は、本考案に係る帯工ブロックの
一例を示すものである。この帯工ブロック10は、複数
の自然石11に小径の貫通孔12を穿設し、各貫通孔が
一列に揃うように自然石11をアーチ状に湾曲させつつ
整列させ、貫通孔12にワイヤロープ14を通して各自
然石11の連結強度を高める一方、座金15を介してク
リップ16によりワイヤロープ14の両端を自然石11
に固定した。尚、図2において符号Gは堤部、Rは河
川、Qは河床である。ワイヤロープ14によって連結さ
せたブロック10は、アーチ突出側を上流に向け、流れ
に抗するように配置する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an example of the banding block according to the present invention. The banding block 10 has a plurality of natural stones 11 in which small-diameter through-holes 12 are drilled, and the natural stones 11 are arched and aligned so that the respective through-holes are aligned, and a wire is inserted into the through-holes 12. While increasing the connection strength of each natural stone 11 through the rope 14, both ends of the wire rope 14 are connected to the natural stone 11 by the clip 16 through the washer 15.
Fixed to. In FIG. 2, reference symbol G denotes a bank, R denotes a river, and Q denotes a riverbed. The blocks 10 connected by the wire ropes 14 are arranged so that the arch projecting side faces upstream and resists the flow.
【0012】自然石11の大きさは河川流量に応じて自
由に変更出来るが、一般河川の氾濫時の流量からいえば
1〜5トン程度の重量をもつ河床自然石を用いるのが望
ましい。また連結させるべき自然石11の個数は、河川
流量、配設箇所の河川形状、使用する自然石11の大き
さ等によって適宜設定できるが、通常の場合には約5〜
10個程度である。この連結が長ければ長いほど、ブロ
ック全体の重量が増すため強い流勢に抗することが可能
となるが、それに比して作業が煩雑化し、維持管理も煩
雑となるため適当な個数で区切りをつけ一つのブロック
単位とする。また、このとき左右両端の自然石11R,
11Lを他の石より大きなものにすると流勢に対する安
定性がさらに向上する。Although the size of the natural stone 11 can be freely changed according to the flow rate of the river, it is preferable to use a natural stone bed having a weight of about 1 to 5 tons in terms of the flow rate during flooding of a general river. The number of natural stones 11 to be connected can be set as appropriate depending on the river flow rate, the river shape at the place of installation, the size of the natural stones 11 to be used, and the like.
There are about ten. The longer the connection, the greater the weight of the entire block, which makes it possible to withstand strong currents.However, the work becomes more complicated and the maintenance and management becomes more complicated, so the appropriate number of partitions must be used. It is a single block unit. Also, at this time, natural stones 11R at the left and right ends,
Making 11L larger than other stones will further improve the stability against currents.
【0013】自然石11は、特ににその外観形状を揃え
る必要はない。このため、また全体をアーチ状に整列さ
せるため、隣合う自然石11同士の間には一定の隙間S
が生ずるが、この部分には必要に応じて間詰め石18を
配する。この間詰め石18によりブロック10全体の強
度が増し、より強く流勢や洗掘に対抗することが可能と
なる。但し、このブロック10はアーチ状突出面を上流
に向けているため、上流側の隙間Sには間詰め石18を
設けなくとも河川によって流されてきた砂利や砂が自然
に詰まり、時間経過に伴って自然に剛性が増す場合が少
なくない。またブロック10の一部に隙間Sがあること
によって、遡上する魚に進路を提供するという効用もあ
るため、必ずしも間詰め石18をすべての隙間Sに配す
る必要はない。The natural stone 11 does not need to be particularly uniform in appearance. For this reason, in order to arrange the whole in an arch shape, a constant gap S is set between adjacent natural stones 11.
However, a filling stone 18 is provided in this portion as necessary. The stuffing stones 18 increase the strength of the entire block 10 and can more strongly resist currents and scouring. However, since the block 10 has the arch-shaped protruding surface facing upstream, gravel and sand that have been washed away by the river are naturally clogged in the gap S on the upstream side without providing the stuffing stones 18 and the time elapses. In many cases, the rigidity naturally increases. In addition, since there is a gap S in a part of the block 10, there is also an effect of providing a course for fish going upstream, so that the filling stone 18 does not necessarily need to be arranged in all the gaps S.
【0014】自然石11に穿設する貫通孔12は、その
口径を約5cm程度に設定する。勿論この数値は、挿入
するワイヤロープ14の外径によって適宜設定変更する
ことが出来るが、約1〜5トンの自然石11を20〜4
0個程度連結させて堅縛するときには、挿通させる索条
径は最低16mm程度を要するため貫通孔12の内径は
前記数値となる場合が多い。各石11に対する孔穿設は
ドリルその他適宜手段によって行う。尚、当然であるが
貫通孔12の形状は問わない。また孔12の穿設位置
は、当該自然石11の重心位置付近に設定するのが望ま
しい。The diameter of the through hole 12 formed in the natural stone 11 is set to about 5 cm. Of course, this value can be changed as appropriate depending on the outer diameter of the wire rope 14 to be inserted.
When about 0 pieces are connected and fastened, the diameter of the rope to be inserted needs to be at least about 16 mm, and the inner diameter of the through hole 12 often has the above value. Drilling of holes in each stone 11 is performed by a drill or other appropriate means. The shape of the through-hole 12 is of course not limited. It is desirable that the hole 12 is set near the center of gravity of the natural stone 11.
【0015】ワイヤロープ14はブロック10全体を堅
縛する必要からクリップ16により両端で固定するが、
固定方式はクリップ16等の部材に限らず、河川の流勢
がさほど強くない箇所に配置する場合には人力等で固結
びにより端末固定させても構わない。勿論、ワイヤ端部
を石11に巻き付けても良い。尚、ここで用いるクリッ
プとは、ワイヤ端末を結んで貫通孔12からの脱落解除
を防止できる各種部材を総称する。貫通孔12の内径よ
りも大きな径を有する部材である限りその形状や構成を
問わない。The wire rope 14 is fixed at both ends by clips 16 because it is necessary to secure the entire block 10.
The fixing method is not limited to the member such as the clip 16. When the river is arranged at a location where the flow of the river is not so strong, the terminal may be fixed by manual tying or the like with human power. Of course, the wire end may be wound around the stone 11. In addition, the clip used here collectively refers to various members that can prevent the release from the through-hole 12 by connecting the wire ends. As long as the member has a diameter larger than the inner diameter of the through hole 12, its shape and configuration are not limited.
【0016】かかる帯工ブロック10によれば、数トン
級の自重を有する自然石11をアーチ状に組んで連結さ
せ、突出側を上流に向けて配するから、アーチ形状によ
る構造強度が増し、川の流れに対してより強くブロック
10が耐える。またブロック全体の重量があるため洗掘
にも耐え、洪水時にもブロック10は流失することがな
い。また自然石11の形状は流勢に対して最小の抵抗で
あるから、流勢が激しても洗掘等による破壊が生じ難く
く、さらに地盤の変化が見られる場合でもブロックは地
盤の変化に応じて自在に変形し、施工部分が破壊に至る
ことは極めて少ない。According to the banding block 10, natural stones 11 having their own weight of several tons are assembled in an arch shape and connected to each other, and the protruding side is arranged upstream, so that structural strength due to the arch shape is increased. The block 10 withstands the flow of the river more strongly. Further, since the entire block has a heavy weight, it can withstand scouring, and the block 10 does not run off even during a flood. In addition, since the shape of the natural stone 11 has the minimum resistance to the flow, it is difficult to cause destruction due to scouring or the like even if the flow is intense. It deforms freely in accordance with the conditions, and it is extremely unlikely that the construction part will be destroyed.
【0017】また自然石の形状により、各石の間には適
度な隙間Sが生ずるが、これらブロック形状により河川
水を泡だたせ、酸素を取り込み撹拌し、魚介や藻類など
の生物群に対し良好な環境を作り出す。また酸素の導入
により河川の自浄作用も促進され、流域環境も良好とな
る。Also, due to the shape of the natural stones, an appropriate gap S is generated between the stones. However, these block shapes cause the river water to bubble, take in oxygen, and stir, thereby preventing organisms such as seafood and algae. Create a good environment. In addition, the introduction of oxygen promotes the self-cleaning action of rivers and improves the environment of the basin.
【0018】またこの実施例に係る帯工ブロックでは、
自然石11を用いてブロックを構成するため、コンクリ
ートを使用した場合に較べ河川水に対するマイナス影響
が全くない。自然石11からは不良な成分(石灰成分
等)が滲み出すことがないからである。また自然石を用
いた場合は、従来の帯工コストよりも格段に経費(材料
コスト、作業コスト)を削減することが出来る。Further, in the zoning block according to this embodiment,
Since the blocks are formed using natural stones 11, there is no negative effect on river water as compared with the case where concrete is used. This is because defective components (such as lime components) do not ooze out of the natural stone 11. When natural stone is used, the cost (material cost, work cost) can be significantly reduced compared to the conventional banding cost.
【0019】尚、本考案に係る帯工ブロックは必ずしも
コンクリート石材の使用を除外するものではない。ブロ
ック単位の石材としてコンクリートを使用する場合は、
河床全体をコンクリートで覆う場合に較べ、水との接触
面積も少なく、またコンクリート使用量も少ないから、
不良成分の滲出しは従来の帯工よりも格段に減少させる
ことが出来、またコスト的にも有利である。The strip block according to the present invention does not necessarily exclude the use of concrete stone. If you use concrete as a block of stone,
Compared to covering the entire riverbed with concrete, the area of contact with water is small and the amount of concrete used is small.
The bleeding of the defective component can be remarkably reduced as compared with the conventional banding, and it is also advantageous in cost.
【0020】ブロック全体を連結させる索条手段はワイ
ヤーロープに限らない。引っ張りに強く可撓性のある他
の素材、例えば繊維強化樹脂その他の素材で編んだ各種
ロープ、樹脂系素材による管状の部材等で代替させても
良い。またコンクリート石材を使用する場合は、出来る
だけ形状を自然石に近づけ、適当な隙間や流勢に対する
抵抗箇所を設けておくのが望ましい。The rope means for connecting the entire block is not limited to the wire rope. It may be replaced with another rope that is knitted with another material that is strong against pulling, such as a fiber reinforced resin or other materials, or a tubular member made of a resin material. When using a concrete stone material, it is desirable to make the shape as close as possible to natural stone and to provide a suitable gap or a place for resistance to flow force.
【0021】石材に穿設する貫通孔の数は一つに限定さ
れない。より大きな石材を連結させる場合等、必要に応
じて複数本の貫通孔を穿設し、それに対応した本数の索
条を用いることも可能である。また石材形状を整える必
要がある場合、少なくとも流勢に面する箇所(特に表面
側)には適当な凹凸を設け、自然の流れを失わないよう
にさせるのが望ましい。The number of through holes formed in the stone is not limited to one. In the case of connecting a larger stone, for example, a plurality of through holes may be formed as necessary, and a corresponding number of cords may be used. When it is necessary to adjust the shape of the stone, it is desirable to provide appropriate unevenness at least at a position facing the flow (particularly on the surface side) so as not to lose the natural flow.
【0022】またこのブロックは、河床に一列配置する
だけでなく、上流から下流にかけて平面的に多段階配設
しても良く、また流勢によっては複数段に積み重ねて立
体的な構成としても良い。The blocks may be arranged not only in a line on the riverbed, but also in a multi-stage arrangement from upstream to downstream in a planar manner, or may be stacked in a plurality of stages depending on the flow to form a three-dimensional structure. .
【0023】[0023]
【考案の効果】以上説明したように本考案に係る帯工ブ
ロックは、帯工石材に小径貫通孔を穿設し、貫通孔を揃
えつつ帯工石アーチ状に並べて連結させたから、強度を
十分に保証し、自然の河川状態を長期に保つ帯工を提供
できる。[Effects of the Invention] As described above, the banding block according to the present invention has a small diameter through-hole in the banding stone material, and is aligned and connected in the shape of the banding stone arch while aligning the through-holes. To provide zoning that guarantees natural river conditions for a long time.
【図1】本考案に係る帯工ブロックの一例を示す平面図
である。FIG. 1 is a plan view showing an example of a band work block according to the present invention.
【図2】図1に示す帯工ブロックのII矢視図である。FIG. 2 is an II view of the banding block shown in FIG. 1;
【図3】図1に示す帯工ブロックの配設例を示す断面図
である。FIG. 3 is a cross-sectional view showing an example of the arrangement of the banding block shown in FIG.
【図4】本考案の実施例に係る自然石を例示する図であ
る。FIG. 4 is a diagram illustrating a natural stone according to an embodiment of the present invention.
【図5】従来における帯工(落差工)を例示する図であ
る。FIG. 5 is a diagram exemplifying a conventional zoning (falling work).
10 帯工ブロック 11 自然石 12 貫通孔 14 ワイヤロープ 15 座金 16 クリップ 18 間詰め石 Q 河床 S 隙間 R 河川(水面) G 堤部 DESCRIPTION OF REFERENCE NUMERALS 10 Obi block 11 Natural stone 12 Through hole 14 Wire rope 15 Washer 16 Clip 18 Filling stone Q Riverbed S Gap R River (water surface) G Embankment
フロントページの続き (56)参考文献 特開 昭52−113030(JP,A) 特開 平2−176008(JP,A) 特開 平6−146239(JP,A) 登録実用新案24221(JP,Z1) (58)調査した分野(Int.Cl.6,DB名) E02B 3/02 E02B 3/14 301 Continuation of the front page (56) References JP-A-52-113030 (JP, A) JP-A-2-176008 (JP, A) JP-A-6-146239 (JP, A) Registered utility model 24221 (JP, Z1) (58) Fields surveyed (Int.Cl. 6 , DB name) E02B 3/02 E02B 3/14 301
Claims (1)
材に小径貫通孔を穿設し、各石に穿設した貫通孔の開口
点を揃えつつ少なくとも5個以上の帯工石材をアーチ状
に湾曲させ、当該湾曲部は、アーチ状突出面を上流に向
けて配設する一方、前記貫通孔に可撓性の索条手段を挿
通させ、該索条手段の両端部を帯工石材の両端部の石材
に座金およびクリップを介して固定することを特徴とす
る河川の帯工ブロック構造。1. A small-diameter through-hole is drilled in a stonework material having a natural weight of 1 to 5 tons using natural stone, and at least five or more bandwork stones are aligned with the opening points of the through-holes drilled in each stone. The material is curved in an arch shape, and the curved portion faces the arch-shaped projecting surface toward the upstream.
A flexible cable means is inserted through the through hole, and both ends of the cable means are connected to the stone material at both ends of the zoning stone material.
A zoning block structure for a river, characterized by being fixed to a river through a washer and a clip .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992086262U JP2600542Y2 (en) | 1992-11-20 | 1992-11-20 | River zoning block structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1992086262U JP2600542Y2 (en) | 1992-11-20 | 1992-11-20 | River zoning block structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0653627U JPH0653627U (en) | 1994-07-22 |
JP2600542Y2 true JP2600542Y2 (en) | 1999-10-12 |
Family
ID=13881910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1992086262U Expired - Lifetime JP2600542Y2 (en) | 1992-11-20 | 1992-11-20 | River zoning block structure |
Country Status (1)
Country | Link |
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JP (1) | JP2600542Y2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4501131B2 (en) * | 2003-09-18 | 2010-07-14 | 秩父太平洋セメント株式会社 | Formation method of river structure suitable for the growth of river organisms |
JP2013221376A (en) * | 2012-04-19 | 2013-10-28 | Kazutaka Sugimura | Method for stabilizing riverbed of river |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52113030A (en) * | 1976-03-17 | 1977-09-21 | Masato Oshikawa | Method of preventing slope of riprap foundation |
JPH02176008A (en) * | 1988-12-27 | 1990-07-09 | Doumon Kensetsu:Kk | Construction of revetment |
JPH06146239A (en) * | 1992-11-02 | 1994-05-27 | Risutoro:Kk | Erosion preventing mat |
-
1992
- 1992-11-20 JP JP1992086262U patent/JP2600542Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0653627U (en) | 1994-07-22 |
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