JPH0241602B2 - - Google Patents
Info
- Publication number
- JPH0241602B2 JPH0241602B2 JP59210036A JP21003684A JPH0241602B2 JP H0241602 B2 JPH0241602 B2 JP H0241602B2 JP 59210036 A JP59210036 A JP 59210036A JP 21003684 A JP21003684 A JP 21003684A JP H0241602 B2 JPH0241602 B2 JP H0241602B2
- Authority
- JP
- Japan
- Prior art keywords
- wave
- dissipating
- block body
- block
- unit
- 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
Links
- 230000000694 effects Effects 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 230000000979 retarding effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
- E02B3/14—Preformed blocks or slabs for forming essentially continuous surfaces; Arrangements thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は河岸、海岸線をなす面を波による浸食
から保護するために消波する擁壁、特に、各単位
ブロツクの係合部を有する被保護面側ブロツク体
と消波側ブロツク体とを内消波間〓を下部に有す
る消波ブロツクにより連設してなる単位ブロツク
を多数積み重ねて構成される消波擁壁に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a retaining wall that dissipates waves in order to protect a surface forming a riverbank or coastline from erosion by waves, and in particular, a retaining wall having an engaging portion of each unit block. This invention relates to a wave-dissipating retaining wall constructed by stacking a large number of unit blocks in which a protective surface-side block body and a wave-dissipating block body are connected by a wave-dissipating block having an inner wave-dissipating space below.
［従来の技術］
この種の擁壁として特開昭48−62239号公報が
提案されており、これは消波側ブロツク体たる消
波用柱が単位ブロツクの全長のほぼ1/2を占めて
いるとともに被保護面側ブロツク体たる防波用壁
が単位ブロツクの全長のほぼ1/6と小さく形成さ
れ、かつ、内消間〓たる横孔が全長の1/3以下に
形成されているため重心が消波側ブロツク体寄り
に集中して不安定であるとともに小さな内消波間
〓のため十分な消波が得られない面があり、加え
て消波側ブロツク体の消波側端面が凹部構造とし
て形成されているためその凹部内に漁船等の舳先
を突込んだり、舷側が引つかかつたりする虞れが
あり、また、防舷材を取り付ける場合には変形ブ
ロツクを設置しなければならない煩雑さを有する
等の欠点があつた。[Prior Art] Japanese Patent Application Laid-open No. 48-62239 has proposed this type of retaining wall, in which the wave-dissipating columns, which are the wave-dissipating block bodies, occupy approximately 1/2 of the total length of the unit block. At the same time, the breakwater wall, which is the block body on the side to be protected, is formed as small as approximately 1/6 of the total length of the unit block, and the horizontal hole, which is the inner block, is formed to be less than 1/3 of the total length. The center of gravity is concentrated near the wave-dissipating block body, making it unstable, and the small internal wave-dissipating gap makes it difficult to obtain sufficient wave dissipation.In addition, the end face of the wave-dissipating side of the wave-dissipating block body has a recess. Because it is formed as a structure, there is a risk that the bow of a fishing boat, etc. may be stuck in the recess, or the side of the ship may become stuck, and when fenders are installed, deformable blocks must be installed. There were drawbacks such as complexity.
［発明が解決しようとする問題点］
本発明が解決しようとする問題点は、各単位ブ
ロツクの係合部を有する被保護面側ブロツク体と
消波側ブロツク体とを内消波間〓を下部に有する
消波ブロツクにより連設してなる単位ブロツクを
積み重ねて構成される消波擁壁において、単位ブ
ロツクの構造を全体にバランスがとれて安定した
ものでありながら大きな消波空〓を形成できるよ
うになし、加えて船先が突込んだり、舷側が引つ
かかつたりする空〓を除去することにある。また
斜入射波による大きな音が発生する。[Problems to be Solved by the Invention] The problems to be solved by the present invention are as follows. In a wave-dissipating retaining wall that is constructed by stacking unit blocks connected in series with wave-dissipating blocks, the structure of the unit blocks is balanced and stable as a whole, and a large wave-dissipating space can be formed. In addition to this, the goal is to eliminate voids that would cause the ship's nose to tumble in or the ship's side to be caught. Also, obliquely incident waves generate loud noise.
［問題点を解決するための手段］
本発明の技術的手段は係合部を有する被保護面
側ブロツク体と消波側ブロツク体とを内消波間〓
を下部に有する消波ブロツク部により連設してな
る単位ブロツクを積み重ねて構成される消波擁壁
において、前記被保護面側ブロツク体と消波側ブ
ロツク体とをほぼ同長に形成するとともに前記内
消波間〓の長さを単位ブロツク長に対して1/2以
上に形成し前記消波側ブロツク体の消波側端面を
単位ブロツクとほぼ同一縦巾の平坦面に形成し、
前記消波ブロツク部の両側下方には斜入射波の消
波壁を形成したことによる。[Means for Solving the Problems] The technical means of the present invention connects the protected surface side block body having the engaging portion and the wave dissipating side block body between the internal wave dissipating side block body.
In a wave-dissipating retaining wall constructed by stacking unit blocks connected by a wave-dissipating block section having a wave-dissipating block section at the bottom, the protected surface side block body and the wave dissipating side block body are formed to have approximately the same length, and The length of the inner wave-dissipating gap is set to 1/2 or more of the unit block length, and the wave-dissipating side end face of the wave-dissipating side block body is formed into a flat surface having approximately the same vertical width as the unit block;
This is because wave-absorbing walls for obliquely incident waves are formed below both sides of the wave-absorbing block portion.
［作用］
単位ブロツクの内消波間〓の長さを単位ブロツ
クの全長の1/3以上に形成するとともに被保護面
側ブロツク体と消波側ブロツク体とをほぼ同長に
形成して全体にバランスよく重心が加わりながら
大きい消波間〓により十分な消波機能が得られ加
えて消波側ブロツク体の消波側端面を単位ブロツ
クの縦巾とほぼ同一縦巾の平坦面に形成したこと
により舳側が突込んだり舷側が引つかかつたりす
る空〓が除去される。また斜入射波用の消波壁に
よつて斜入射波による遊水部内の横の流れが弱め
られ遊水部内の波の大きな音が消音される。[Function] The length of the wave-dissipating gap in the unit block is made to be 1/3 or more of the total length of the unit block, and the block body on the protected surface side and the block body on the wave-dissipating side are formed to have almost the same length, so that the whole Sufficient wave-dissipating function is obtained by adding a well-balanced center of gravity and a large wave-dissipating gap.In addition, the wave-dissipating side end face of the wave-dissipating block body is formed into a flat surface with a vertical width that is almost the same as the vertical width of the unit block. Empties where the ship's side is pushed in or the ship's side is stuck are eliminated. Further, the wave-absorbing wall for obliquely incident waves weakens the lateral flow within the water retarding section caused by obliquely incident waves, and muffles the loud noise of waves within the retarding section.
［実施例］
本発明の単位ブロツクＡは第１図〜第６図に示
すように、係合部１，２を有する直方体の被保護
面側ブロツク体３と消波側ブロツク体４とを内消
波間〓５を下部に有する消波ブロツク部６により
連設して形成される。[Example] As shown in FIGS. 1 to 6, the unit block A of the present invention includes a rectangular parallelepiped protected surface side block body 3 and a wave dissipating side block body 4 having engaging portions 1 and 2. It is formed by a wave-dissipating block part 6 having a wave-dissipating gap 5 at its lower part.
前記係合部１，２は被保護面側ブロツク体３の
上面巾員方向の係合突起１と下面巾員方向の係合
溝２とから形成される。その場合、係合溝２を設
けないで突起１を被保護面側ブロツク体３の内側
縦壁と対応する箇所に形成することにより、その
縦壁と突起１との係合により単位ブロツクＡを固
定するようにしてもよい。内消波間〓５はその長
さ寸法ａが単位ブロツクＡの全長の1/3以上に形
成されるとともに被保護面側ブロツク体３と消波
側ブロツク体４とがそれぞれ1/3以下でほぼ同長
に形成されることにより両側に重心がバランスよ
く加わりながら大きな内消波間〓５が得られるよ
うに構成している。 The engaging portions 1 and 2 are formed of an engaging protrusion 1 extending in the width direction of the upper surface of the protected surface side block body 3 and an engaging groove 2 extending in the width direction of the lower surface. In that case, by forming the protrusion 1 at a location corresponding to the inner vertical wall of the protected surface side block body 3 without providing the engagement groove 2, the unit block A can be formed by the engagement of the vertical wall and the protrusion 1. It may be fixed. The inner wave-dissipating space 5 is formed so that its length a is 1/3 or more of the total length of the unit block A, and the protected surface side block body 3 and the wave-dissipating side block body 4 are each approximately 1/3 or less. By forming them to have the same length, the center of gravity is added to both sides in a well-balanced manner, and a large internal wave dissipation gap 〓5 can be obtained.
消波側ブロツク体４と消波ブロツク部６の両側
に凹部７が形成されてその巾寸法ｂが被保護面側
ブロツク体３の巾寸法より小さく形成されてい
る。 Recesses 7 are formed on both sides of the wave-dissipating block 4 and the wave-dissipating block 6, and the width b thereof is smaller than the width of the protected surface block 3.
消波側ブロツク体４の消波側端面８の縦巾ｃを
単位ブロツクＡの縦巾とほぼ同巾の垂直平坦面に
形成している。 The vertical width c of the wave-dissipating end face 8 of the wave-dissipating block body 4 is formed into a vertical flat surface having approximately the same width as the vertical width of the unit block A.
消波側ブロツク体４の上端両側には前記被保護
面側ブロツク体３の両側端と端面が揃う程度に一
対のフランジ部９が前記消波側ブロツク体４とほ
ぼ同じ長さで突出形成され、そのフランジ部９の
下方にはそれぞれ前記内消波間〓５に連通する外
消波間〓１０を形成している。９ａはフランジ部
９の下面に形成した傾斜部である。その場合、内
消波間〓５は消波ブロツク部６の下方と側方の空
〓部から形成されており、その消波ブロツク部６
の下面の両側端には長さ方向に向かつて凹部１１
が設けられ、この凹部１１により斜入射波の消波
壁１１ａを形成している。そして、基盤には施工
の際捨てコンクリート等により地盤に固定される
ものであり、その後端側上面巾員方向に沿い係合
突起１３が形成されており、その係合突起１３に
係合溝２を係合させることにより基礎上に隣接し
て単位ブロツクＡを設置し、これを擁壁の最下段
となし、この上方に係合突起１を係合させて千鳥
状に単位ブロツクＡを所要段積み重ねることによ
り外消波間〓１０と内消波間〓５が形成される。
なお、擁壁の両側端に配設される単位ブロツクＡ
は段端面を揃えるために単位ブロツクＡのうち一
段おきに巾調整をして形成している。また最上段
には係合突起１を有しない単位ブロツクA′が設
置され、最上面にはエア抜きパイプを内設したス
ラブ層（図示せず）が形成され、そのエア抜きパ
イプが被保護面側の側溝（図示せず）に連通する
ように形成されている。なお、擁壁の両側端を揃
えるための巾調整を行わなくてもよく、最上段の
単位ブロツクに係合突起を設けなくてもよい。し
たがつて、単位ブロツクＡはその内消波間〓５が
単位ブロツクＡの全長の1/3以上に形成されると
ともに被保護面側ブロツク体３と消波側ブロツク
体４とがそれぞれ1/3以下でほぼ同長に形成され
ているため単位ブロツクＡの両側に重心がバラン
スよく加わり安定した擁壁になり岸壁および防波
堤として堅牢なものになり、加えて内消波間〓５
は従来のものに比し大となるため優れた消波効果
が得られる。しかも、内消波間〓５には消波ブロ
ツク部６の下面の両側端に長さ方向の凹部１１が
設けられて消波壁１１ａを形成しているため、斜
入射波による遊水部内の横の流れが弱められ遊水
部内の波の大きな音が消音できる。またこの消音
効果は前記エア抜きパイプにより一層良好にな
る。また、消波側ブロツク体４の上端両側には前
記被保護面側ブロツク体３の両側端と端面が揃う
程度に一対のフランジ部９が突出形成されている
ため、フランジ部９の下方には従来のものに比し
外消波間〓１０のスペースが大となり前記内消波
間〓５とも相俟つて優れた消波効果を期待でき
る。また、一対のフランジ部９が隣接する単位ブ
ロツクＡと接触し支持されるため、横振れを生じ
ないで堅牢なものになる。また、消波側ブロツク
体４の消波側端面８が縦巾ｃの垂直平坦面を形成
しているため漁船の舳先が突込んだり、舷側が引
つかかつたりする事故を防止でき、仮りに外消波
間〓１０に船先が入つても傾斜部９ａにより外れ
やすい。また変形ブロツクがなくても防舷材の取
付けが可能である。全体的に軽量体となり施工が
容易で安価なものになる。 A pair of flange portions 9 are formed protruding from both sides of the upper end of the wave-dissipating block body 4 and have approximately the same length as the wave-dissipating block body 4 so that the end faces are aligned with both ends of the protected surface side block body 3. , an outer wave-dissipating gap 10 communicating with the inner wave-dissipating gap 5 is formed below the flange portion 9, respectively. 9a is an inclined portion formed on the lower surface of the flange portion 9. In that case, the internal wave-dissipating gap 5 is formed from the lower and side hollow parts of the wave-dissipating block section 6.
Concave portions 11 are provided at both ends of the lower surface of the
The recess 11 forms a wave-absorbing wall 11a for obliquely incident waves. The base is fixed to the ground with concrete or the like during construction, and an engaging protrusion 13 is formed along the width direction of the upper surface on the rear end side, and an engaging groove 2 is formed in the engaging protrusion 13. By engaging the unit blocks A, install the unit blocks A adjacent to the foundation, making this the lowest level of the retaining wall, and engage the engaging protrusions 1 above to install the unit blocks A at the required level in a staggered manner. By stacking them, an outer wave dissipating space 10 and an inner wave dissipating space 5 are formed.
In addition, unit blocks A installed at both ends of the retaining wall
is formed by adjusting the width of every other stage of the unit block A in order to align the end faces of the stages. Furthermore, a unit block A' having no engagement protrusion 1 is installed at the top, and a slab layer (not shown) having an air bleed pipe inside is formed on the top surface, and the air bleed pipe is connected to the surface to be protected. It is formed so as to communicate with a side gutter (not shown). Note that it is not necessary to adjust the width to align both ends of the retaining wall, and it is not necessary to provide an engaging protrusion on the uppermost unit block. Therefore, in the unit block A, the wave dissipating space 5 is formed to be 1/3 or more of the total length of the unit block A, and the protected surface side block body 3 and the wave dissipating side block body 4 are each 1/3 of the total length. Since they are formed with approximately the same length, the center of gravity is well-balanced on both sides of the unit block A, making it a stable retaining wall and a solid quay and breakwater.
is larger than the conventional one, so an excellent wave-dissipating effect can be obtained. In addition, since the internal wave-dissipating space 5 is provided with longitudinal recesses 11 at both ends of the lower surface of the wave-dissipating block part 6 to form a wave-dissipating wall 11a, the lateral damage in the retarding section due to obliquely incident waves is The flow is weakened and the loud noise of waves in the retarding area can be muffled. Moreover, this sound deadening effect is further improved by the air vent pipe. Further, a pair of flange portions 9 are formed protruding from both sides of the upper end of the wave-dissipating side block body 4 to such an extent that the end faces are aligned with both side ends of the protected surface side block body 3. Compared to the conventional one, the space of the outer wave-dissipating space 10 is larger, and in combination with the inner wave-dissipating space 5, an excellent wave-damping effect can be expected. Furthermore, since the pair of flange portions 9 are in contact with and supported by the adjacent unit blocks A, the structure is made sturdy without causing lateral vibration. In addition, since the wave-dissipating side end face 8 of the wave-dissipating side block body 4 forms a vertical flat surface with a longitudinal width c, it is possible to prevent accidents such as the prow of the fishing boat plunging into it or the ship's side being caught. Even if the tip of the ship enters the outer wave-dissipating gap 10, it is likely to come off due to the inclined portion 9a. Furthermore, fenders can be installed without deformable blocks. The overall body is lightweight, easy to construct, and inexpensive.
第９図、第１０図は本発明の変形例を示してお
り、前記実施例と同一部分に同一符号を用いて説
明すると消波ブロツク部６のほぼ中央に横振防止
が可能な一対のフランジ部９ｂを形成したものを
示している。フランジ部９ｂは消波ブロツク部６
の側部に垂設して内消波間〓５を仕切る脚部を形
成するようにしてなり、第１０図の矢印のように
斜入射波を消波、消音するものであり、前記実施
例と同様に各種効果が得られる。 9 and 10 show a modification of the present invention, in which the same parts as in the previous embodiment are denoted by the same reference numerals.A pair of flanges capable of preventing lateral vibration are provided approximately in the center of the wave-dissipating block portion 6. A portion 9b is shown. The flange portion 9b is the wave dissipating block portion 6
The leg part is vertically installed on the side of the inner wave-absorbing space 5 to form a leg part that partitions the internal wave-absorbing space 5, and as shown by the arrow in FIG. Similarly, various effects can be obtained.
［発明の効果］
本発明は係合部を有する被保護面側ブロツク体
と消波側ブロツク体とを内消波間〓を下部に有す
る消波ブロツク部により連設してなる単位ブロツ
クを積み重ねて構成される消波擁壁において、前
記被保護面側ブロツク体と消波側ブロツク体とを
ほぼ同長に形成するとともに前記内消波間〓の長
さを単位ブロツク長に対して1/2以上に形成し前
記消波側ブロツク体の消波側端面を単位ブロツク
とほぼ同一縦巾の平坦面に形成し、前記消波ブロ
ツク部の両側下方には斜入射波の消波壁を形成し
てなるため、全体にバランスのとれた安定感をも
つ単位ブロツクの積み重ねにより岸壁、防波堤と
して堅牢な擁壁になり、大きな消波空〓によつて
十分な消波効果が期待でき、舳先が突込んだり舷
側が引つかかつたりすることが防止され、さらに
斜入射波による大きな音を消音でき、その効果は
大きい。[Effects of the Invention] The present invention stacks up unit blocks in which a protected surface side block body having an engaging portion and a wave dissipating side block body are connected by a wave dissipating block portion having an inner wave dissipating space at the bottom. In the constructed wave-dissipating retaining wall, the protected surface side block body and the wave-dissipating side block body are formed to have approximately the same length, and the length of the inner wave-dissipating space is at least 1/2 of the unit block length. The wave-dissipating side end face of the wave-dissipating block body is formed into a flat surface having approximately the same vertical width as the unit block, and wave-dissipating walls for obliquely incident waves are formed below both sides of the wave-dissipating block portion. Therefore, by stacking unit blocks that have a well-balanced sense of stability as a whole, it becomes a solid retaining wall as a quay or breakwater, and the large wave-dissipating air can be expected to have a sufficient wave-dissipating effect. This prevents the ship's side from pulling or swaying, and furthermore, it can muffle loud noises caused by obliquely incident waves, which is highly effective.
第１図〜第６図は本発明の単位ブロツクの実施
例であり、第１図は斜視図、第２図は底面図、第
３図は側面図、第４図は正面図、第５図は第１図
の−線断面図、第６図は第１図の−線断
面図、第７図は単位ブロツクの積み重ね状態を示
す正面図、第８図は同側面図、第９図は変形例の
斜視図、第１０図は同底面図である。
１，２……係合部、３……被保護面側ブロツク
体、４……消波側ブロツク体、５……内消波間
〓、６……消波ブロツク部、８……消波側端面、
１１ａ……消波壁（斜入射波用の消波壁）、Ａ…
…単位ブロツク。
Figures 1 to 6 show examples of the unit block of the present invention, with Figure 1 being a perspective view, Figure 2 being a bottom view, Figure 3 being a side view, Figure 4 being a front view, and Figure 5 being a front view. is a sectional view taken along the line -- in Fig. 1, Fig. 6 is a sectional view taken along the - line in Fig. 1, Fig. 7 is a front view showing the stacked state of the unit blocks, Fig. 8 is a side view of the same, and Fig. 9 is a deformed one. A perspective view of the example, and FIG. 10 is a bottom view of the same. DESCRIPTION OF SYMBOLS 1, 2... Engagement part, 3... Protected surface side block body, 4... Wave-dissipating side block body, 5... Inner wave-dissipating space, 6... Wave-dissipating block part, 8... Wave-dissipating side End face,
11a...Wave-dissipating wall (wave-dissipating wall for oblique incident waves), A...
...unit block.
Claims (1)
側ブロツク体とを内消波間〓を下部に有する消波
ブロツク部により連設してなる単位ブロツクを積
み重ねて構成される消波擁壁において、前記被保
護面側ブロツク体と消波側ブロツク体とをほぼ同
長に形成するとともに前記内消波間〓の長さを単
位ブロツク長に対して1/2以上に形成し前記消波
側ブロツク体の消波側端面を単位ブロツクとほぼ
同一縦巾の平坦面に形成し、前記消波ブロツク部
の両側下方には斜入射波の消波壁を形成すること
を特徴とする消波擁壁。1. A wave-dissipating retaining wall constructed by stacking unit blocks in which a protected surface side block body having an engaging portion and a wave-dissipating side block body are connected by a wave-dissipating block section having an inner wave-dissipating space at the bottom. The protected surface side block body and the wave-dissipating side block body are formed to have approximately the same length, and the length of the inner wave-dissipating gap is formed to be 1/2 or more of the unit block length, and the wave-dissipating side block body is formed to have approximately the same length. A wave-dissipating support characterized in that the wave-dissipating side end face of the block body is formed into a flat surface having approximately the same vertical width as the unit block, and wave-dissipating walls for obliquely incident waves are formed below both sides of the wave-dissipating block portion. wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21003684A JPS6187007A (en) | 1984-10-04 | 1984-10-04 | Wave dissipating retaining wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21003684A JPS6187007A (en) | 1984-10-04 | 1984-10-04 | Wave dissipating retaining wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187007A JPS6187007A (en) | 1986-05-02 |
| JPH0241602B2 true JPH0241602B2 (en) | 1990-09-18 |
Family
ID=16582742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21003684A Granted JPS6187007A (en) | 1984-10-04 | 1984-10-04 | Wave dissipating retaining wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6187007A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2183671B1 (en) * | 2000-02-02 | 2004-06-16 | Berenguer Ingenieros, S.L. | ARTIFICIAL PIECE FOR THE CONSTRUCTION OF DIKS, SPRINGS AND RIBERAS OF LOW REFLECTIVITY. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4862239A (en) * | 1971-12-02 | 1973-08-30 |
-
1984
- 1984-10-04 JP JP21003684A patent/JPS6187007A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4862239A (en) * | 1971-12-02 | 1973-08-30 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187007A (en) | 1986-05-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |