WO2006093214A1 - Systeme de transport et procede de transport pour sediments dragues - Google Patents

Systeme de transport et procede de transport pour sediments dragues Download PDF

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Publication number
WO2006093214A1
WO2006093214A1 PCT/JP2006/303943 JP2006303943W WO2006093214A1 WO 2006093214 A1 WO2006093214 A1 WO 2006093214A1 JP 2006303943 W JP2006303943 W JP 2006303943W WO 2006093214 A1 WO2006093214 A1 WO 2006093214A1
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WO
WIPO (PCT)
Prior art keywords
water
dredged
sea
downstream
pipeline
Prior art date
Application number
PCT/JP2006/303943
Other languages
English (en)
Japanese (ja)
Inventor
Akio Kojima
Tokuaki Kojima
Saburo Sato
Original Assignee
Damdre Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Damdre Corporation filed Critical Damdre Corporation
Publication of WO2006093214A1 publication Critical patent/WO2006093214A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F7/00—Equipment for conveying or separating excavated material
    • E02F7/02—Conveying equipment mounted on a dredger
    • E02F7/023—Conveying equipment mounted on a dredger mounted on a floating dredger
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/02—Sediment base gates; Sand sluices; Structures for retaining arresting waterborne material

Definitions

  • the present invention relates to dredged soil for transporting dredged sand from a large-capacity reservoir such as a dam where river water flows at a high altitude away from the sea to the sea or a nearby river.
  • the present invention relates to a sand transport system and a method for transporting dredged sand using the transport system.
  • the term “sedimental sand” includes sediment, mud, sludge, etc., or a mixture thereof that is generated when the bottom of a large-capacity reservoir such as a dam is dredged.
  • the term “large-capacity reservoir” includes various dams and various large-capacity reservoirs (for example, lakes, recreational ponds, etc.) in which a decrease in effective depth due to sediment accumulation from the upstream side of the river is a problem. Regardless of whether it is an artificial or a natural object!
  • Patent Document 1 Japanese Patent Application Laid-Open No. 11-46515
  • the present invention has been proposed in view of the above circumstances, and a large amount of earth and sand deposited on the bottom of a large-capacity reservoir such as a dam is relatively low energy and cost.
  • the objective is to provide a new dredged soil transport system and its transport method that allow efficient discharge to the sea or nearby rivers while taking into account no impact.
  • the present invention provides dredged sand of a large-capacity reservoir in a high place away from the sea and into which river water flows. It is a transportation system for dredged sand transported to rivers.
  • the siphon pipe that sucks dredged sand from a large-capacity reservoir together with water by siphon action, and the dredged sand and sand sucked up in the pipe connected to the downstream end of the siphon pipe.
  • a natural flow path that naturally flows a fluid containing water to the sea or a nearby river using gravity and the natural flow path includes a plurality of pipelines arranged in tandem with each other, and their phases
  • the first feature is that it has a relay rod that is interposed between adjacent pipelines and can temporarily store the fluid from which the upstream pipeline force has flowed down and discharge it to the downstream Neuve line.
  • the present invention can separate water from the fluid flowing down through the natural flow path and discharge it into the sea or a nearby river, and the remaining dredged soil.
  • Water capable of temporarily storing sand and recovering at least a part thereof Z Sediment separation processing means Force
  • the sand is disposed continuously to the downstream end of the most downstream pipeline of the natural flow path. Yes.
  • the water Z sediment separation treatment means receives the fluid flowing down through the natural flow path and precipitates dredged soil in the fluid. Let multiple sedimentation tanks precipitate the supernatant water in the fluid in each sedimentation tank in turn downstream.
  • the third feature is that it is arranged so that it can overflow into the tank, and the supernatant water overflowing from the most downstream sedimentation tank is discharged into the sea or nearby river.
  • the plurality of settling tanks have their respective upper surfaces opened, and the upstream force on the riverbed in the estuary is sequentially arranged in series in the downstream side.
  • the fourth feature is that it is arranged.
  • each relay rod includes an inlet portion to which an upstream pipeline is connected and an outlet portion to which a downstream pipeline is connected.
  • a fifth feature is that an open / close valve is provided at each of the inlet and outlet portions.
  • the present invention further comprises microbubble supply means for supplying countless fine bubbles to the inside of the siphon tube or at least a part of the pipeline.
  • microbubble supply means for supplying countless fine bubbles to the inside of the siphon tube or at least a part of the pipeline.
  • the present invention is a method for transporting dredged sand using the transport system according to any one of the first to sixth features, wherein at least one dredged sediment deposited and accumulated in at least one relay dredger is provided.
  • the seventh feature is that a part of it is collected and not allowed to flow into the downstream pipeline.
  • the present invention is a method for transporting dredged sand using the transport system according to any one of the first to sixth features, wherein at least some of the relay troughs have other large nearby Eighth feature of supplying fluid containing water sucked from capacity reservoir and dredged soil
  • dredged sand from a large-capacity reservoir located at a high place away from the sea is sucked out together with water by siphon action of a siphon tube, and then the sea or Since it was allowed to flow down naturally in the nearby river JI, the dredged sand in the large-capacity reservoir can be transported to the sea or nearby rivers without any difficulty using gravity. Energy saving and cost reduction, and there is no need to worry about polluting river water in the middle with dredged soil or affecting the ecosystem. In addition, it causes problems such as traffic congestion as in the case of transportation by dump vehicles. There's no fear.
  • the downstream flow path is interposed between the multiple pipelines arranged in tandem with each other and the adjacent pipelines, and temporarily stores the fluid that has also flowed down the upstream pipeline force. Because it has a relay rod that can be discharged, the internal pressure of each pipeline can be reduced and its durability can be increased, and maintenance on the pipeline can be performed in units of pipelines separated by the relay rod. The maintenance work is relatively easy.
  • the water Z earth and sand separation processing means arranged continuously to the downstream end of the downstream line of the natural flow path is caused to flow down through the natural flow path. It is possible to discharge only relatively clean water to the sea or nearby rivers, and temporarily store the remaining dredged soil in the water Z sediment separation treatment means and collect at least a part of it. Therefore, compared to the case where all dredged sand is released directly into the sea or nearby rivers, it is possible to minimize the effects of water pollution and ecosystems on the sea or nearby rivers.
  • the water Z sediment separation treatment means receives a fluid flowing down through a natural flow path and deposits dredged sand in the fluid.
  • the number of settling tanks is arranged so that the supernatant water in the fluid in each settling tank can be sequentially overflowed to the downstream settling tank, and the supernatant water overflowing from the most downstream settling tank is arranged. Since it was released into the sea or nearby rivers, it was possible to increase the cleanliness of the discharged water, and to more effectively reduce the water pollution and ecosystem impacts of the sea or nearby rivers. it can.
  • each of the plurality of sedimentation tanks has an open upper surface, and the upstream side force on the riverbed near the estuary is sequentially arranged in series downstream. Since it is installed, a relatively large settling tank can be arranged in many stages using the wide space of the riverbed near the estuary, and the water purification function can be enhanced accordingly. In addition, when the riverbed at the estuary is submerged due to flooding, the sediment in each settling tank can be easily washed away by the muddy flow of the river.
  • each relay rod includes an inlet portion to which an upstream pipeline is connected and an outlet portion to which a downstream pipeline is connected.
  • the microbubble supply means for supplying countless fine bubbles to the inside of the siphon tube or at least a part of the pipeline is provided, the countless fine bubbles are provided.
  • the effect of mixing and dispersing in the fluid can effectively reduce the frictional resistance between the fluid and the inner surface of the siphon tube or pipeline, and can also reduce the density of the fluid. Can flow smoothly.
  • the aerobic microorganisms in the fluid and oxygen in the fine bubbles can be sufficiently brought into contact with each other, the microorganisms can be activated, so that the odor of the fluid reaching the sea or near the estuary, Turbidity is improved and the amount of dissolved oxygen increases, which is advantageous for environmental measures.
  • At least a part of dredged sediment deposited and accumulated in at least one relay dredger is collected and does not flow into the downstream pipeline. Therefore, it is convenient when reclaiming dredged soil as a construction material, agricultural material, etc. in the area near the relay dredger, and the flow of dredged soil to the sea side is reduced by the amount of reuse. be able to.
  • a fluid containing water sucked from other large-capacity reservoirs in the vicinity thereof and dredged sand is supplied into at least some of the relay dredgers.
  • dredged sand from multiple large-capacity reservoirs can be easily merged at the relay basin, and can be naturally flowed down to the sea side using the noopline on the downstream side.
  • FIG. 1 is an overall schematic longitudinal sectional view showing an outline of a dredged sand transport system showing a first embodiment of the present invention. (First example)
  • FIG. 2 is an enlarged view of the portion indicated by arrow 2 in FIG. (First example)
  • FIG. 3 is an enlarged view of a portion indicated by an arrow 3 in FIG. (First example)
  • FIG. 4 is an enlarged sectional view taken on line 4-4 of FIG. (First example)
  • FIG. 5 is an enlarged view of the portion indicated by arrow 5 in FIG. (First example)
  • FIG. 6 is a plan view taken along arrow 6 in FIG. (First example)
  • Fig. 7 is an enlarged longitudinal sectional view showing a main part of a second embodiment of the present invention. (Second embodiment) Explanation of symbols
  • the dredged sediment transport system uses dredged sediment 1 generated by dredging work at dam D as a large-capacity reservoir where water from river R flows at a high altitude away from the sea. From dam D to ridge or river nearby R Used to transport up to gravity.
  • This system is composed of a siphon pipe S that siphons dredged sand 1 of dam D together with water, and the siphon pipe 1 connected to the downstream end of the siphon pipe S and sucked in the pipe S and water.
  • a natural flow path P that naturally flows down to the sea O or a nearby river R using the gravity flow P, and the water O separated from the fluid that has flowed through the natural flow path P
  • It is equipped with water Z sediment separation treatment means SE that can be discharged into the river R nearby and can temporarily store the remaining dredged soil 1 and at least partially recover it.
  • the siphon tube S is provided on a work boat B that can be arbitrarily moved on the reservoir surface of the dam D, and a movable suction tube U whose suction port Ue can be moved up and down in water.
  • Conveying pipe A that extends long downwards over the dam D weir to one end connected to the downstream end of the inlet pipe U and the other end directly downstream of dam D and to a relay rod PmO provided at a position lower than dam D
  • the movable suction pipe U and the transport pipe A cooperate with each other to form a siphon pipe S.
  • the suction port Ue of the movable suction pipe U is brought to the sediment 1 or the vicinity of the bottom of the dam D, and the water suction pump (not shown) on the dredger B has a priming function.
  • start siphon action of siphon tube S As a result, the siphon pipe S can suck up the sediment 1 on the bottom of the dam from the suction port Ue together with the water, and can gradually and continuously flow through the pipe to the relay rod PmO.
  • an open / close valve capable of interrupting the siphon action by interrupting the tube at any time, and air is mixed into the siphon tube S
  • Air mixing means (not shown) for adjusting the suction force by the siphon action of the tube S
  • the dredger B is provided with drive means 2 that can move the suction port Ue of the movable suction pipe U up and down to an arbitrary height, and the propulsion means ( (Not shown) is also provided.
  • the above-mentioned medium PmO temporarily stores a fluid containing dredged sand 1 and water that has naturally flowed down from the siphon pipe S by a siphon action, and can be gradually discharged downstream.
  • the structure is basically the same as that of the relay fence Pm provided in the natural flow path P described later. Is the same. That is, the main body 3 is formed in the shape of a large-capacity water tank and placed on the ground, and the siphon pipe S (in the example shown in the drawing) is connected to the inlet 3i that is opened at a relatively high position of the main body 3.
  • the natural flow path P is interposed between a plurality of pipelines Pp ... arranged in tandem with each other and the adjacent pipelines Pp, Pp, and flows from the upstream pipeline Pp. It is equipped with a relay dredger Pm that temporarily stores dredged soil 1 and water, and that can be gradually discharged into the downstream pipeline Pp.
  • the relay dredging Pm ensures smooth natural flow of the fluid in each pipeline Pp based on the total length of the natural flow path P and the height difference between the upper and downstream ends of the natural flow path P. A plurality of them are installed at an appropriate distance and with an appropriate height difference, but it goes without saying that the downstream relay pole Pm is placed at a lower position.
  • each pipeline Pp may basically have a downward slope, or a part of the pipeline Pp may have an upward slope depending on the terrain in the middle of the force placed horizontally.
  • a single pipeline Pp connecting two adjacent relays Pm is configured by connecting a number of pipeline elements 4 arranged in series with each other in series. At least some of the pipeline elements 4 are supported by a concrete support frame 5 that is erected and fixed on the ground at intervals in the length direction of the pipeline Pp.
  • Each relay rod Pm has basically the same structure as the relay rod PmO at the downstream end of the siphon pipe S.
  • the inlet 3i of the rod body 3 has a downstream end of the upstream pipeline Pp. Is connected, and the upstream end of the downstream pipeline Pp is connected to the outlet 3e.
  • the inlet 3i and outlet 3e are provided with on-off valves Vi and Ve, respectively.
  • At least a part (all in the illustrated example) of the relay rod Pm is supplied with microbubbles for supplying innumerable microbubbles (air) having a diameter force S of 100 m or less into the pipeline Pp.
  • Mean M is attached.
  • This microbubble supply means M generates a mixed phase flow in which fine bubbles are sufficiently dispersed and mixed in the pump 6 that pumps water from the relay Pm and pressurizes it, and in the water pressurized by the pump 6 Multiphase flow generator 7 and its generation And a pipe 8 that joins the mixed-phase flow generated in the device 7 to the downstream pipeline Pp and mixes the fine bubbles with the fluid flowing through the pipeline Pp.
  • microbubbles are so-called "microbubbles", and exhibit various physical properties due to their size effect, not just when the macrosized bubbles become smaller. For example, these fine bubbles rise very gently as if the soot is still in the water, and the bubbles exhibit excellent uniformity and dispersibility in the water, and the gas absorption efficiency into the water is increased. The feature is that the amount of dissolved oxygen can be increased rapidly. Then, when such countless fine bubbles are mixed and dispersed in the fluid containing dredged sand and water in the pipeline Pp, the frictional resistance between the fluid and the inner surface of the pipeline Pp is effectively reduced.
  • the durability of the pipeline Pp is improved, and the density of the fluid can be reduced, so that the fluid can flow smoothly even at relatively small height differences.
  • the microorganisms can be activated. Odor * Improves turbidity and increases the amount of dissolved oxygen, which improves the quality of water discharged into the sea, which is advantageous for environmental measures.
  • the above-mentioned microbubble supply means M may be installed on the dredger work boat B or on the relay rod PmO provided at the downstream end of the siphon tube S.
  • the fine bubbles can be dispersed and mixed in a fluid containing dredged sand 1 and water flowing in the pipeline Pp.
  • This water Z sediment separation treatment means SE is arranged continuously to the downstream end of the most downstream pipeline Pp of the natural flow path P, and in the illustrated example, is arranged at the riverbed 10 at the estuary Re.
  • This water Z earth and sand separation treatment means SE receives a plurality of dredged earth and sand 1 flowing through the natural flow path P and a fluid containing water, and precipitates the dredged earth and sand 1 in the fluid.
  • the sedimentation tanks A1 to A3 are arranged so that the supernatant water in the fluid in each of the sedimentation tanks A1 to A3 can be sequentially overflowed to the downstream sedimentation tank. The overflowed supernatant water is discharged directly into the sea.
  • Each of the plurality of sedimentation tanks A1 to A3 is configured in a relatively shallow water tank shape in which the upper surface of each of the precipitation tanks A1 to A3 is open, and is sequentially arranged in series from the upstream side to the downstream side of the riverbed 10 near the river mouth Re. Arranged.
  • the weirs 11 to 13 provided on the sea sides of the settling tanks A1 to A3 are formed so as to be lower on the downstream side, and the particle sizes on the downstream side of the settling tanks A1 to A3 are smaller. The dredged soil begins to settle.
  • the siphon action will continue even if the water absorption pump is stopped.
  • the sediment 1 on the bottom of the dam D is sucked up together with the water, and the dam D Discharge gradually and continuously into the relay basin PmO immediately downstream.
  • the dredging ship B is moved little by little, and the dredged sediment 1 on the bottom of the dam D is abbreviated to the bottom of the dam D with less energy and cost. It is possible to dredge efficiently over the entire area.
  • the fluid containing dredged sand 1 and water that has flowed into the first relay dredger PmO via the siphon pipe S is a part of the dredged sand 1 precipitated and deposited in the relay dredger PmO. ⁇
  • the fluid containing earth and sand 1 and water is discharged from the outlet 3e to the natural flow path P of the present invention (the uppermost pipe line Pp), and the natural flow path P is gradually and continuously formed by gravity. Flow down.
  • the fluid containing dredged soil 1 and water repeats the above process in each relay dredging Pm and gradually moves to the downstream side, and finally water Z in the riverbed 10 near the estuary Re.
  • Sediment separation treatment means reaches SE.
  • the fluid is sequentially received in a plurality of sedimentation tanks A1 to A3 arranged in series along the river flow direction on the river bed 10, and the dredged soil in the fluid is received. 1 is settled sequentially, and the supernatant water in the fluid in each of the sedimentation tanks A1 to A3 sequentially overflows to the downstream sedimentation tank, and finally the supernatant water that overflows from the most downstream sedimentation tank A3 enters the sea O.
  • dredged sand with a smaller particle size will be deposited and deposited in the sedimentation tanks A1 to A3, so the sediment 1 stored in each of the sedimentation tanks A1 to A3 is supplied from the outside. It can be sampled without difficulty, and can be effectively used for construction materials, agricultural materials, and other uses according to the particle size.
  • mid-soil recovery of dredged soil 1 can also be performed at least at some relay dredgers PmO, Pm- ... upstream from water Z sediment separating means SE. It is.
  • the dredged soil 1 of the dam D located at a high place where the sea O force is also separated is sucked out together with water by the siphon action of the siphon pipe S, and then the natural flow path P is Via Since it will naturally flow down to the sea O, the dredged sand of the dam D can be transported to the sea O reasonably and gently using gravity, and energy saving and cost reduction for the transportation can be achieved. In addition, there is no concern that the river water area will be polluted with dredged soil or affect the ecosystem, and there will be no risk of traffic jams, air pollution, vibration noise, etc. as in the case of transportation by dump truck.
  • the natural flow path P is constructed by connecting adjacent ones of multiple pipelines Pp arranged in tandem with a relay Pm, so that the pipeline Pp is compared to the case without a relay Pm.
  • the internal pressure of the pipe can be reduced sufficiently and its durability is improved.
  • the maintenance of the pipeline Pp can be performed in units of the pipeline Pp separated by the relay ⁇ Pm, so the maintenance work becomes relatively easy.
  • the water Z sediment separation treatment means SE connected to the downstream end of the natural flow path P is the river J near the estuary Re with the upper surfaces of the plurality of sedimentation tanks Al to A3 constituting each of them. Since the upstream force of the bed 10 is also arranged in series in the downstream side, the relatively large sedimentation tanks A1 to A3 can be arranged in many stages using the wide space of the river bed 10. Only water purification function can be enhanced. Also, when the riverbed 10 at the estuary Re is submerged due to flooding, the sediment in the sedimentation tanks A1 to A3 is washed away by the turbidity of the river. Don't worry.
  • FIG. 7 shows a main part of the second embodiment of the present invention.
  • the relay dredging Pm is supplied with fluid containing water and dredged sand that has been sucked out by the siphon pipe S 'from other nearby large-capacity dams.
  • a second inlet 3 for adding the dam and the dredged soil to the dam body 3 near the downstream of the dam is added through the siphon pipe S '.
  • the second inlet 3 is also provided with an on-off valve V.
  • the other structure of the second embodiment is basically the same as that of the first embodiment.
  • the same effect as that of the first embodiment can be achieved, and other dams and other fluids containing water 1 and water can be relayed. Can be accepted by Pm. Then, both dams D and D 'powerful dredged soil 1, 1' are easily merged with V at the relay pit Pm, and both of them naturally flow to the sea O side using the noopline Pp downstream. Can be lowered.
  • the force that simply shows the structure of the siphon tube ⁇ is also applied to other dams in the second embodiment. Using the dredger B used for the dredging, the dredging work with the same high force as the dredging at the dam D may be performed.
  • the siphon pipe S' is not used, but the water sucked up by the pump and dredged soil! / Are supplied into the relay dredger Pm. Well, ...
  • the water Z sediment separation treatment means SE has shown that the supernatant water overflowed from the most downstream settling tank A3 is directly discharged into the sea O.
  • the supernatant water may be discharged into a river R near the sea O, such as the river mouth Re.
  • the water Z sediment separation treatment means SE is provided on the riverbed 10 near the estuary Re.
  • it is not always necessary to provide it on the riverbed. Any place that can be discharged directly into river R is acceptable.
  • the water in each of the relay rods Pm, PmO is flown to the downstream side.
  • the falling water flow of the dams D, D ' A pumping pump driven by the electric power generated by the hydroelectric power generation equipment used is installed, and the pumping action of this pump ensures that at least part of the water in the relay poles Pm and PmO near dams D and D ' , D 'may be returned.
  • the pump 6 of the microbubble supply means M may be driven with the above power.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Sludge (AREA)

Abstract

L’invention concerne un système de transport et un procédé de transport. Le système de transport comprend une conduite-siphon (S) aspirant par siphonage des sédiments dragués (1) dans un bassin de stockage d’eau (D) de grande capacité, tel qu’un barrage, avec de l’eau et un passage d’écoulement naturel (P) cheminant de façon continue jusqu’à l’extrémité aval de la conduite-siphon (S) et assurant l’écoulement naturel d’un fluide contenant les sédiments dragués (1) et l’eau aspirés par la conduite-siphon (S) vers la mer (O) ou une rivière (R) proche de la mer par effet gravitaire. Le passage d’écoulement naturel (P) comprend une pluralité de canalisations (Pp) disposées en rangée verticale et des fosses tampons (Pm) interposées entre des canalisations (Pp) adjacentes et stockant provisoirement le fluide s’écoulant de la canalisation amont (Pp) et l’évacuant dans la canalisation aval (Pp). Il est donc possible d’assurer l’évacuation efficace vers la mer ou une rivière proche de la mer d’un volume important de sédiments qui se sont déposés au fond d’un bassin de stockage d’eau de grande capacité, et ce à un coût réduit et avec une consommation réduite d’énergie, en minimisant ainsi l’impact sur le milieu naturel.
PCT/JP2006/303943 2005-03-02 2006-03-02 Systeme de transport et procede de transport pour sediments dragues WO2006093214A1 (fr)

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JP2005-057728 2005-03-02
JP2005057728A JP3999788B2 (ja) 2005-03-02 2005-03-02 浚渫土砂の長距離輸送システム及びその輸送方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2944298A1 (fr) * 2009-04-14 2010-10-15 Aldo Urtiti Remise en etat ecologique du delta du nil recreant les conditions naturelles d'avant la construction du barrage nasser

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107688086B (zh) * 2017-08-18 2020-12-04 中国农业科学院农业环境与可持续发展研究所 一种浅沟侵蚀输沙能力的定量表达方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5585796A (en) * 1978-12-21 1980-06-28 Shimizu Construction Co Ltd Aggregate gathering facility
JPH08158397A (ja) * 1994-12-09 1996-06-18 Tadao Tomiyama ヘドロなどの除去方法及び除去装置
JP2003001282A (ja) * 2001-06-22 2003-01-07 Kitayama Haruichi 廃水処理装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5585796A (en) * 1978-12-21 1980-06-28 Shimizu Construction Co Ltd Aggregate gathering facility
JPH08158397A (ja) * 1994-12-09 1996-06-18 Tadao Tomiyama ヘドロなどの除去方法及び除去装置
JP2003001282A (ja) * 2001-06-22 2003-01-07 Kitayama Haruichi 廃水処理装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2944298A1 (fr) * 2009-04-14 2010-10-15 Aldo Urtiti Remise en etat ecologique du delta du nil recreant les conditions naturelles d'avant la construction du barrage nasser

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JP2006241790A (ja) 2006-09-14

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