EP0548707B1 - Méthode et dispositif pour augmenter la profondeur des cours d'eau - Google Patents

Méthode et dispositif pour augmenter la profondeur des cours d'eau Download PDF

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Publication number
EP0548707B1
EP0548707B1 EP19920121125 EP92121125A EP0548707B1 EP 0548707 B1 EP0548707 B1 EP 0548707B1 EP 19920121125 EP19920121125 EP 19920121125 EP 92121125 A EP92121125 A EP 92121125A EP 0548707 B1 EP0548707 B1 EP 0548707B1
Authority
EP
European Patent Office
Prior art keywords
pressure
accordance
water
jet
nozzles
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
Application number
EP19920121125
Other languages
German (de)
English (en)
Other versions
EP0548707A1 (fr
Inventor
Siegbert Dipl.-Ing. Sacklowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anton Muesing & Co KG GmbH
Original Assignee
Anton Muesing & Co KG GmbH
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 Anton Muesing & Co KG GmbH filed Critical Anton Muesing & Co KG GmbH
Publication of EP0548707A1 publication Critical patent/EP0548707A1/fr
Application granted granted Critical
Publication of EP0548707B1 publication Critical patent/EP0548707B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9206—Digging devices using blowing effect only, like jets or propellers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9243—Passive suction heads with no mechanical cutting means
    • E02F3/925—Passive suction heads with no mechanical cutting means with jets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
    • E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles

Definitions

  • the invention relates to a device for increasing the water depth of a body of water, which has a high-pressure jet device with at least one high-pressure nozzle for forming at least one high-pressure water jet that can be directed against the bottom of the water, and a high-pressure pump for supplying water to the high-pressure jet device, and preferably an additional whirling device, for acting on the base material of the water bed - And / or suction device, wherein the device is preferably provided for equipping a watercraft.
  • a device of the type mentioned is already known from DE-C-29 195.
  • the device shown there which is arranged on a watercraft, also has a high-pressure jet device in order to plow away the base material of a body of water with high-pressure jets.
  • the device shown there also has, at least optionally, a whirling device.
  • EP-A-0075358 discloses a suction device which would be suitable as a generic supplementary device for the device mentioned.
  • FR-A-1399762 also shows a suitable swirling and / or suction device for a generic device.
  • US-A-2956354 generally discloses a high pressure water jet device with high pressure nozzles.
  • a generic device works particularly well in relatively softer water, for example as found on the North Sea coast, e.g. is about removing mud, mud or other sludge deposits in order to increase the water depth.
  • the invention is therefore based on the object of demonstrating a generic device in which it is ensured on the or each high-pressure nozzle that the high-pressure jet can still act with as much force as possible on the base material, that is, the jet in the ambient water between the nozzle and the bottom not so quickly diverges or swirls.
  • the object is achieved in that coaxially an outer tubular jacket is arranged to the high-pressure nozzle, such that a jacket-water jet enveloping the high-pressure jet can emerge from the annular intermediate space between the tubular jacket and the high-pressure nozzle.
  • US-A-3572839 has already disclosed an enveloping jacket jet for a high-pressure water jet.
  • this jacket jet is an air jacket jet, which in practice cannot give satisfactory results.
  • relatively hard water base material which resists the conventional devices, is thus advantageously pre-processed and thereby weakened.
  • Such a weakening is brought about in that the base material is cut or cut with the high pressure jet or the high pressure jets.
  • the weakening or cutting or cutting of the material according to the invention is carried out specifically in the method according to the invention. This enables the use of the otherwise known devices of the type mentioned at the outset. Resisting material is only weakened to the extent that the conventional methods are otherwise applicable.
  • the water with a high pressure is preferred of about 10 - 200 MPa (100 - 2000 atm), preferably about 25 MPa (250 atm).
  • the clay base possibly also the stone base, can be weakened in such a way that further removal can be carried out using conventional methods.
  • the high-pressure nozzle is positioned or guided as close as possible to the base material to be weakened, preferably at most about 10 cm.
  • the device according to the invention is preferably part of a watercraft, so that a large area of water can be treated with the watercraft.
  • conventionally designed water vehicles essentially only need to be equipped with a high-pressure pump, a high-pressure line and one or more high-pressure nozzles for the conversion according to the invention.
  • Such a conversion is therefore relatively simple and inexpensive to perform with advantage.
  • the high-pressure nozzle is preferably protected, for example by being surrounded by mudguards, so that only the nozzle opening remains free for the exit of the nozzle jet, while the nozzle itself is protected against mechanical damage which could occur when moving the nozzle over the ground.
  • the Device according to the invention has a group of high-pressure nozzles.
  • these are preferably movable relative to the base.
  • this movement can take place solely in that they are arranged on a movable watercraft.
  • additional mobility can also be provided, in which the nozzles also move relative to the watercraft or the device.
  • a group of high-pressure nozzles can be arranged in a row, which can be moved back and forth overall, preferably transversely to the longitudinal axis of a watercraft, so that a respective high-pressure nozzle describes a meandering path above the water bed when such a watercraft is moving, and a resisting base material meanders accordingly - or cuts.
  • Another embodiment of the device according to the invention provides that a group of high-pressure nozzles is arranged in a circle and is arranged axially rotatable or pivotable on this circular arc in the circle.
  • the bottom of the body of water is very small, practically chopped up by the high-pressure jets, so that further removal of the weakened base material is easily possible using conventional methods .
  • the circularly arranged group of high-pressure nozzles which rotates and is moved forward as a whole by a watercraft, acts comparatively like a blender stick of a kitchen machine when it is used to crush harder pieces of fruit, vegetables or nuts, the device according to the invention having the advantage that this is done by High-pressure blasting is carried out smoothly and without contact.
  • a further development of the invention provides that the high-pressure jet device with a whirling device and / or suction device is combined or the high-pressure jet device is integrated in these other devices.
  • the high-pressure jet device according to the invention supports the conventional devices, which otherwise operate in a conventional, proven manner.
  • the high-pressure jet device is preferably (somewhat) arranged upstream of the conventional devices mentioned.
  • the suction device comprises a preferably rectangular suction opening, in front of which high-pressure nozzles, preferably approximately three to four high-pressure nozzles, are arranged in a row parallel to the front side of the suction opening.
  • the high-pressure nozzles use their high-pressure jets to break up or weaken the base to be extracted immediately before the suction opening.
  • the suction opening can, for example, have a width of approximately 1 m to 1.20 m and suck off base material along a correspondingly wide path.
  • three to four high-pressure nozzles can be arranged at a distance of about 30 cm from one another.
  • the nozzle openings can be round or slit-shaped, e.g. with a diameter of 2.6 mm.
  • the angle of the high-pressure nozzle is adjustable in the longitudinal direction of the watercraft.
  • the high-pressure nozzle is preferably set at an angle of approximately 15 ° to the vertical in the direction of travel of the watercraft (obliquely).
  • the weakening effect of the base material is greatest with such an inclination of the high-pressure nozzle in the direction of travel.
  • the high-pressure jet then has a force component in the vertical but also a force component in the horizontal, so that a plow effect arises that processed base material looks like plowed after the action of the high pressure jet. If there are several high-pressure nozzles, these are preferably adjustable independently of one another.
  • the jacket jet there may be at least one opening in the tube jacket for the suction or entry of ambient medium (ambient water). Only due to the suction effect of the high-pressure jet, the surrounding medium then enters the intermediate space between the shells and a jacket jet is formed which, surrounded by the high-pressure jet, is entrained by this high-pressure jet and protects the high-pressure jet.
  • ambient medium ambient water
  • the jacket intermediate space can be pressurized with a jacket jet medium under pressure, preferably with about 0.6 MPa (6 atm).
  • a jacket jet around the high pressure jet is then generated with its own pressure source.
  • the pressure preferably used in this case corresponds to the pressure which is used for the flushing medium in the swirling or flushing device which is generally present anyway, so that the intermediate space between the shells only has to be connected to the pressure source which is present anyway.
  • the nozzle opening of the high-pressure nozzle can generally be very small in diameter, that is to say usually has a size of a few millimeters, it is provided that when the ambient medium is used as the high-pressure jet medium, a device for cleaning the medium is present, that is to say in the broadest sense Filter system to prevent jamming and damage to the nozzle and also the high pressure pump. This should also avoid maintenance intervals of the high-pressure device that are too short, so that the device according to the invention can also operate unexpectedly over a longer period of time.
  • the suction device includes a suction line 2 which can be pivoted against the water bed 1 and has a suction opening 3.
  • the flushing device includes a U-shaped flushing line 4 which can be pivoted against the bottom of the body of water 4.
  • a flushing medium is passed through the flushing line under pressure and sprayed against the bottom of the body of water with nozzles in jet mode. These jet nozzles are arranged in series along the base line section of the U-bracket shape of the flushing line 4.
  • FIG. 2 schematically shows a part of this base section of the flushing line 4 in a perspective view.
  • the jet nozzles 5 are arranged along this section, through which the flushing medium is sprayed against the water bed 1.
  • FIG. 3 shows a cross section through the flushing line section 4 according to FIG. 2. From this illustration it can be seen even more clearly that the high-pressure nozzles 6 are arranged upstream of the jet nozzles 5 in the direction of travel.
  • the high-pressure nozzles 6 are also provided in this illustration of FIG. 3 with a protective cage 8 in order to avoid damage or contamination by the water bed 1.
  • a corresponding protective cage could also be provided for the jet nozzles 5, or the jet nozzles 5 could be included in this protective cage 8.
  • FIG. 4 shows the section of the suction line 2 which can be swiveled into the water, at the free end of which the suction opening 3 is located.
  • the direction of travel of the hopper excavator according to FIG. 1 is the direction indicated by arrow 9.
  • High-pressure nozzles 6, which can essentially correspond to the high-pressure nozzles 6 on the flushing device according to FIGS. 2 and 3, are arranged upstream of the suction opening 3 in the direction of travel.
  • a hopper excavator according to FIG. 1 with a suction device and with a flushing device can have high-pressure nozzles 6 in front of the suction device and / or in front of the flushing device in order to weaken the basic material to be cleared off before suction and / or flushing.
  • high-pressure nozzles can be arranged in a position directly in front of the suction opening 3 or can also be advanced at a distance therefrom, that is to say relatively independently of the suction opening 3.
  • FIG. 5 shows the bottom view of the suction opening 3 according to FIG. 4. It can be seen that this suction opening 3 is protected with a grate 10 against the penetration of larger foreign bodies.
  • three high-pressure nozzles 6 can be arranged in a row in front of the suction opening 3, that is to say in the position near the suction opening according to FIG. 4. In the position 6 somewhat more distant from the suction opening 3 according to FIG. 4, the high-pressure nozzles could 6 can be accommodated in a separate housing, which can be moved or mounted, for example, independently of the mouth of the suction line 2 having the suction opening 3.
  • a housing 11 in question for accommodating three high-pressure nozzles 6 is shown in a cross section in FIG. 6.
  • FIG. 7 shows a longitudinal section through the housing 11 and FIG. 8 shows a plan view of the housing 11, which is shown in part in a chiselled manner.
  • the section of FIG. 7 runs along the dash-dotted line shown in FIG. 8 with A to F. 6 runs along the dash-dotted line labeled VI-VI in FIG. 8.
  • the high-pressure nozzles 6 are not shown in detail. These high-pressure nozzles 6 can be arranged in the positions 6 in such a way that they protrude downward from the housing 11 as shown in FIG. 7.
  • the housing 11 is shown in FIGS. 6 to 8, which accommodates various clamping screws 12 with which the assembled high-pressure nozzles 6 can be set in certain pivot positions.
  • the high-pressure nozzles 6 can be pivoted gimbally about orthogonal axes 13, 14 individually by adjusting the tensioning screws 12 accordingly.
  • the individual high-pressure nozzles 6 can be pivoted about the axes 14, which run transversely to the direction of travel 9 of the hopper excavator, so that the high-pressure nozzles 6 can in particular be adjusted so that their nozzle openings point somewhat in the direction of travel to the bottom 1, preferably at an angle of approximately 15 ° to the vertical.
  • the effective distance between the points of impact of the high-pressure jets on the base 1 from one another can be changed by pivoting about the axis 13.
  • FIG. 9 shows a longitudinal section of a high-pressure nozzle 6, as it could be arranged on the housing 11.
  • the high-pressure nozzle 6 can be connected to a high-pressure line 7 via a connection 15.
  • the high-pressure nozzle 6 has a nozzle orifice 16 which can be replaced, so that nozzle openings of different geometries and / or diameters can be used as required.
  • An outer tubular jacket 17 extends coaxially around the high-pressure nozzle 6 such that a jacket intermediate space 18, which surrounds the high-pressure nozzle 6 in a ring, remains between the tubular jacket 17 and the high-pressure nozzle 6.
  • Suction openings 19 are arranged laterally in the tubular jacket 17, so that the suction effect of the high-pressure jet, which emerges from the high-pressure nozzle 6, allows ambient water to be sucked in through the inlet openings 19 into the jacket space 18 and is entrained by the high-pressure jet, in such a way that the jacket surrounds the jacket jet in a protective manner.
  • the inlet openings 19 could also be closed and a pressure connection could be provided on the connection-side end face 20 of the tubular jacket 17 for connecting the jacket intermediate space 18 to its own pressure line.
  • the pressure for the pressure medium passed through the jacket space 18 is preferably chosen to be substantially lower than the pressure for the high-pressure jet from the high-pressure nozzle 6.
  • the pressure source comes into consideration, which also corresponds to the jet nozzles 5 of the suction device 2 and 3 supplied.
  • FIGS. 10 and 11 show, once in a side view and once in a bottom view, the suction line mouths of a suction line 2, roughly corresponding to FIGS. 4 and 5.
  • the high-pressure nozzles 6 are arranged in a row in the direction of travel in front of the suction opening 3, in the exemplary embodiment according to FIG. 11 the high-pressure nozzles 6 are arranged on a circle in front of the suction opening 3.
  • the circular support 21 of the high-pressure nozzles 6 is rotatable or alternately rotatable about an essentially vertical axis 22, so that the high-pressure nozzles 6 move on a corresponding circular path or when the traveling movement of the hopper excavator is superimposed on cycloid-like paths. This movement of the high-pressure nozzles 6 results in a particularly intensive comminution of the base material of the base 1, since the rotating high-pressure nozzles 6 achieve a puree effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (13)

  1. Dispositif pour augmenter la profondeur d'eau d'un cours d'eau, qui, pour agir sur le matériau du fond du cours d'eau, comporte un dispositif à jet haute pression avec au moins une buse haute pression (6) pour la formation d'au moins un jet d'eau à haute pression dirigeable vers le fond du cours d'eau et qui comprend une pompe à haute pression pour l'alimentation en eau du dispositif à jet haute pression ainsi que de préférence un dispositif supplémentaire de mise en turbulence et/ou d'aspiration, le dispositif étant prévu de préférence pour équiper une embarcation,
    caractérisé
    en ce que coaxialement à la buse haute pression (6) est placée une gaine de tube (17) externe de manière qu'un jet d'eau de gaine, enveloppant le jet de buse haute pression, puisse sortir de l'espace intermédiaire de gaine (18) annulaire entre la gaine de tube (17) et la buse haute pression (6).
  2. Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un groupe de buses haute pression (6).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la buse haute pression (6) ou le groupe de buses haute pression (6) est mobile par rapport au fond (1).
  4. Dispositif selon la revendication 3, caractérisé en ce qu'un groupe de buses haute pression (6) est placé en série et est déplaçable dans un mouvement de va-et-vient, de préférence transversalement à l'axe longitudinal d'une embarcation.
  5. Dispositif selon la revendication 3, caractérisé en ce qu'un groupe de buses haute pression (6) est placé sur un cercle et peut tourner ou pivoter axialement sur ce cercle (support de cercle 21) autour de l'axe de symétrie (22).
  6. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que le dispositif à jet haute pression est combiné avec un dispositif de mise en turbulence et/ou un dispositif d'aspiration.
  7. Dispositif selon la revendication 6, caractérisé en ce que le dispositif à jet haute pression est situé en amont d'un dispositif de mise en turbulence, dans le sens de déplacement d'une embarcation.
  8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que le dispositif à jet haute pression est situé en amont du dispositif d'aspiration, dans le sens de déplacement d'une embarcation.
  9. Dispositif selon les revendications 2 et 8, caractérisé en ce que le dispositif d'aspiration comprend une ouverture d'aspiration (3), de préférence rectangulaire, devant laquelle sont placées, en une rangée parallèle au côté avant de l'ouverture d'aspiration (3), des buses haute pression (6), de préférence trois à quatre buses haute pression (6).
  10. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que la buse haute pression (6) est réglable dans son angle par rapport à la verticale, dans la direction longitudinale de l'embarcation, sur laquelle elle est placée ou doit être placée.
  11. Dispositif selon la revendication 10, caractérisé en ce que la buse haute pression (6) est réglable dans un angle d'environ 15° par rapport à la verticale, dans le sens de déplacement (9) de l'embarcation.
  12. Dispositif selon les revendications 10 et 11, caractérisé en ce que les buses haute pression (6) sont réglables indépendamment l'une de l'autre.
  13. Dispositif selon une ou plusieurs des revendications précédentes, caractérisé en ce que dans la gaine de tube (17) est prévue au moins une ouverture (19) pour l'aspiration ou pour l'entrée de fluide ambiant (eau ambiante).
EP19920121125 1991-12-24 1992-12-11 Méthode et dispositif pour augmenter la profondeur des cours d'eau Expired - Lifetime EP0548707B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4142942 1991-12-24
DE4142942 1991-12-24
DE4226492 1992-08-11
DE19924226492 DE4226492A1 (de) 1991-12-24 1992-08-11 Verfahren und vorrichtung zum vergroessern der wassertiefe eines gewaessers

Publications (2)

Publication Number Publication Date
EP0548707A1 EP0548707A1 (fr) 1993-06-30
EP0548707B1 true EP0548707B1 (fr) 1996-04-03

Family

ID=25910542

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920121125 Expired - Lifetime EP0548707B1 (fr) 1991-12-24 1992-12-11 Méthode et dispositif pour augmenter la profondeur des cours d'eau

Country Status (4)

Country Link
EP (1) EP0548707B1 (fr)
DE (2) DE4226492A1 (fr)
DK (1) DK0548707T3 (fr)
ES (1) ES2086627T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9400551A (nl) * 1994-04-07 1995-11-01 Hollandsche Betongroep Nv Werkwijze alsmede vaartuig voor het behandelen van een waterbodem.
NL1005330C2 (nl) * 1997-02-20 1998-08-24 Dredging Int Werkwijze voor het maken van een geul onder de waterlijn en inrichting hiervoor.
BE1011285A3 (nl) * 1997-07-17 1999-07-06 Dredging Int Sleepkop voor een sleephopperzuiger en werkwijze voor het baggeren met behulp van deze sleepkop.
DE19738518C1 (de) * 1997-09-03 1999-02-04 Ralph Melkau Verfahren zur Beseitigung von Ablagerungen auf Gewässerböden
AUPP125598A0 (en) * 1998-01-09 1998-01-29 Barry, Kevin Francis Jr Combination vacuum/high pressure/low pressure water sucker excavation unit
GB2403974A (en) * 2003-07-08 2005-01-19 Onyx Uk Ltd Nozzle assembly for removal of aggregate, e.g. railway ballast
BE1020372A5 (nl) * 2012-01-16 2013-08-06 Baggerwerken Decloedt En Zoon Zuigkop voor een baggerschip en werkwijze voor het baggeren met behulp van zuigkop.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29195C (de) * R. STONE in New-York, V. St. A Hydraulischer Baggerapparat zur Beseitigung von Sandbänken und dergleichen
US2956354A (en) * 1956-06-14 1960-10-18 Charles W Varner Dredging apparatus
FR1399762A (fr) * 1964-04-03 1965-05-21 Grenobloise Etude Appl Perfectionnements aux élindes de dragues suceuses
US3572839A (en) * 1968-08-28 1971-03-30 Toa Kowan Kogyo Kk Process for excavation of hard underwater beds
EP0029469B1 (fr) * 1979-11-15 1984-03-21 Ballast-Nedam Groep N.V. Procédé de dragage et équipement de dragage
NL8104293A (nl) * 1981-09-17 1983-04-18 Ihc Holland Nv Werkwijze voor het opzuigen van grond of slib met een sleepzuiger alsmede sleepzuiger voor het toepassen van de werkwijze.
DE9116245U1 (fr) * 1991-05-28 1992-05-14 Anton Muesing Gmbh & Co. Kg, 2957 Westoverledingen, De

Also Published As

Publication number Publication date
DE4226492A1 (de) 1993-07-01
DE59205905D1 (de) 1996-05-09
EP0548707A1 (fr) 1993-06-30
ES2086627T3 (es) 1996-07-01
DK0548707T3 (da) 1996-08-19

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