EP3543408B1 - Slurry wall mill and method for creating a milled slit in the ground - Google Patents

Slurry wall mill and method for creating a milled slit in the ground Download PDF

Info

Publication number
EP3543408B1
EP3543408B1 EP18163075.7A EP18163075A EP3543408B1 EP 3543408 B1 EP3543408 B1 EP 3543408B1 EP 18163075 A EP18163075 A EP 18163075A EP 3543408 B1 EP3543408 B1 EP 3543408B1
Authority
EP
European Patent Office
Prior art keywords
cutting
milling
trench
cleaning
wheels
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.)
Active
Application number
EP18163075.7A
Other languages
German (de)
French (fr)
Other versions
EP3543408A1 (en
Inventor
Thomas Domanski
Karl van der Waal
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.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau 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
Priority to EP18163075.7A priority Critical patent/EP3543408B1/en
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to CA3092741A priority patent/CA3092741A1/en
Priority to PCT/EP2019/055606 priority patent/WO2019179770A1/en
Priority to US16/982,015 priority patent/US11236480B2/en
Priority to CN201980020858.5A priority patent/CN112154237A/en
Priority to KR1020207027468A priority patent/KR20200132888A/en
Priority to JP2020550859A priority patent/JP2021518500A/en
Publication of EP3543408A1 publication Critical patent/EP3543408A1/en
Application granted granted Critical
Publication of EP3543408B1 publication Critical patent/EP3543408B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • 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
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • 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
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9218—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with jets
    • 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
    • E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
    • E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
    • E02F3/9231—Suction wheels with axis of rotation parallel to longitudinal axis of the suction pipe
    • 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
    • E02F3/9256—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head
    • E02F3/9268—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements
    • E02F3/9275—Active suction heads; Suction heads with cutting elements, i.e. the cutting elements are mounted within the housing of the suction head with rotating cutting elements with axis of rotation parallel to longitudinal axis of the suction pipe
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/961—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements with several digging elements or tools mounted on one machine

Definitions

  • the invention relates to a trench wall cutter for creating a milling slot in the ground with a milling frame, at least one pair of milling wheels which are rotatably mounted and driven on the milling frame, each milling wheel having a plurality of milling teeth along its outer circumference, and a feed and / or Discharge device for feeding a milling liquid into or out of the milling slot in the area of the milling wheels, according to the preamble of claim 1.
  • the invention relates to a method for creating a milling trench in the ground with such a trench wall cutter, wherein the cutting wheels are driven to rotate and the trench wall cutter is sunk into the ground and soil material is milled off, the milling slot being created in the soil, according to the preamble of claim 12.
  • a trench wall cutter of the generic type with a cleaning device for the cutting wheels is based on the EP 2 703 565 A1 emerged.
  • trench wall cutters are used to create so-called diaphragm walls or sealing walls, which are required for securing or sealing construction pits, for example.
  • a trench wall cutter is used to create a first cut slot which is filled with a hardenable compound. This mass hardens to form a diaphragm wall segment. By stringing together several diaphragm wall segments, a diaphragm wall can be created in a desired size.
  • a feed device opens between the two pairs of cutting wheels, by means of which a settable liquid can be introduced into the cutting slot in the area between the cutting wheels.
  • the liquid which can be set is supplied with the milled soil material by the rotary movement of the milling wheels mixed to a hardenable mass, which can then harden to the slit wall segment.
  • the milled soil material is mixed directly in situ in the milling slot to form the hardenable mass.
  • Another method for producing a diaphragm wall segment in the ground is based on DE 41 41 629 A1 emerged.
  • a discharge device is provided between the cutting wheels, with which the milled soil material is sucked off above ground directly with the support liquid located in the milling slot.
  • the extracted suspension can be depleted of soil material in a separating device and returned to an upper area of the milling trench.
  • the suspension can be prepared in such a way that it represents a hardenable mass which hardens in the milling slot to form the slit wall segment.
  • the invention is based on the object of specifying a trench wall cutter and a method for creating a milling slot in the ground with which a milling slot can be produced particularly efficiently.
  • a cleaning device for cleaning the milling wheels in milling operation with a cleaning fluid is provided at a distance from the feed and / or discharge device and that the cleaning device has a plurality of cleaning nozzles which are directed at the outer circumference of at least one milling wheel and are designed for injecting the cleaning fluid to loosen adhering soil material.
  • One aspect of the invention consists in providing a cleaning device at a distance from or separately from the feed and / or discharge device for a milling fluid, by means of which the milling wheels can be cleaned during milling by means of a cleaning fluid.
  • a cleaning fluid By means of a cleaning fluid, the milling wheels and in particular the milling teeth can be cleaned particularly reliably and without substantial wear in the milling operation, in which the milling wheels rotate and cut off soil material.
  • the cleaning device has a plurality of cleaning nozzles which are directed at the outer circumference of at least one milling wheel and are designed to inject the cleaning fluid to loosen soil material adhering to the milling teeth.
  • the cleaning fluid can be a liquid or a gas or a gas-liquid mixture.
  • the cleaning nozzles are at a distance from the feed device for milling fluid, which feeds a relatively large amount of milling fluid into the milling slot in a milling process with in situ mixing in order to operate the milling machine.
  • the milling wheels have a largely consistently high milling performance even with longer operating times when milling cohesive soil material, without the milling operation having to be interrupted for cleaning the trench wall cutter for days.
  • This not only increases the daily milling performance of a milling machine, but also leads to an improved quality of the hardenable Mass in the milling slot, since the milling slot can preferably be machined in one stroke of the trench wall cutter.
  • the milling resistance and thus the energy consumption are reduced.
  • a preferred embodiment of the trench wall cutter according to the invention consists in that two pairs of cutting wheels are provided and that the feed and / or discharge device is arranged in a center between the two cutting wheels.
  • the milling wheels of a pair are rotatably mounted about a common axis of rotation.
  • the axis of rotation is preferably arranged horizontally in the milling mode.
  • the axes of rotation of the two pairs are arranged in parallel.
  • the feed and / or discharge device is arranged in the middle between the two milling wheels, so that the milling liquid can be fed or discharged centrally.
  • the cleaning device with the cleaning nozzles for the individual milling wheels are each arranged at a distance from the center laterally to the respective milling wheels.
  • fixed cleaning nozzles can be provided.
  • the cleaning nozzles are adjustable.
  • ball nozzles can be provided that can be clamped in a set position by means of a corresponding union nut.
  • the cleaning device has nozzle rails, one nozzle rail being arranged along the outer circumference of each milling wheel and running approximately parallel to the axis of rotation of the milling wheel.
  • several nozzle rails can also be provided for each milling wheel.
  • a nozzle rail can be referred to as a so-called common rail, which is supplied with cleaning fluid via a supply line from a central pressure generating device, in particular an injection pump.
  • a central pressure generating device in particular an injection pump.
  • different injection quantities and injection pressures can also be provided and set on the individual cleaning nozzles.
  • Such a trench wall cutter is preferably developed in that rod-shaped cleaning rails are attached to the nozzle rail and that the cutting teeth are attached a milling wheel are arranged in annular rows of milling teeth which are axially spaced from one another to form annular interspaces, and that the rod-shaped cleaning nozzles protrude into the annular interspaces.
  • milling wheels are used in which the milling teeth are arranged in axially offset annular milling tooth rows on the outer circumference of a milling wheel. Between the annular rows of milling teeth, annular spaces are formed into which the rod-shaped cleaning nozzles protrude.
  • the rod-shaped cleaning nozzles extend from the respective nozzle rail in the direction of the milling wheel center.
  • the rod-shaped cleaning nozzles can have one nozzle opening or also several nozzle openings, so that targeted nozzle jets can be directed onto the milling teeth in the milling teeth rows or the outer circumference of the milling wheels. Adjustable nozzles can be provided at the cleaning openings.
  • a particularly good cleaning is achieved according to the invention in that clearing plates are arranged on the milling frame for stripping off adhering soil material from the milling wheels.
  • Clearing plates are basically known from the prior art. These are mechanical stripping devices which preferably extend into the annular gaps between the annular rows of milling teeth in order to scrape soil material located there from the gaps.
  • the mechanical clearing plates must be arranged at a certain distance from the rows of milling teeth in order to avoid collisions during milling that could occur due to vibrations of the individual machine parts during operation.
  • remaining floor material can be removed by the cleaning fluid with the cleaning device according to the invention.
  • the cleaning nozzles are integrated into the scraper plates or are attached close to them.
  • the scraper plates themselves can be designed as hollow plates, the cavity serving as a supply of cleaning fluid to the cleaning nozzles on the scraper plates.
  • the rod-shaped cleaning nozzles in particular can be attached to a
  • nozzle rails are connected via feed lines to at least one injection pump with which the cleaning fluid can be injected under pressure.
  • the injection pump can be arranged above ground or on the milling frame of the trench wall cutter.
  • a control device is provided with which the injection pressure and / or an injection quantity of the cleaning fluid can be set.
  • a sufficient injection pressure and a sufficient injection quantity of cleaning fluid can be set in order to reliably clean the milling teeth of soil material.
  • the control device can also be used to set a desired pressure in the area of the milling wheels, which can have a positive effect on milling and mixing of milled soil material with milling fluid.
  • the cleaning fluid corresponds to the milling fluid.
  • the cleaning fluid can be a hardenable suspension, in particular a cement suspension, which is used to remove soil material.
  • the cleaning fluid injected under pressure can at the same time support mixing of the milled soil material, so that a particularly good hardenable suspension for forming the diaphragm wall element is established, particularly in the case of an in situ method.
  • Water can also be provided as the cleaning fluid in order, for example, at the end of an operating day to clean the milling wheels by the cleaning device outside the milling slot.
  • the feed device has a feed pump for feeding the milling liquid, the milling liquid and the cleaning fluid being mixed with the milling wheels in the milling slot with milled soil material to form a hardenable suspension.
  • a trench wall cutter for an in situ milling and mixing process is preferably used as Cleaning fluid uses the milling fluid.
  • the feed pump on the milling frame can convey both the milling fluid to the feed device and the cleaning fluid to the cleaning nozzles. A particularly efficient construction of the trench wall cutter can be achieved in this way.
  • the discharge device has a suction pump with which milling liquid with the cleaning fluid and milled soil material is sucked out of the milling slot.
  • a so-called suction box at the lower end of the trench wall cutter is used to suck off milling fluid from the milling slot below the milling frame by means of the suction pump and the discharge device, which has one or more suction openings.
  • a rope or a rod is attached to an upper end of the milling frame, with which the trench wall cutter is suspended from a carrier device and vertically adjustable.
  • the milling wheels can be cleaned during milling operation both when milling the ground material and during a lifting movement by means of the rope or the rod.
  • the method according to the invention for milling a milling trench in the ground with the aforementioned trench wall milling machine is characterized in that a cleaning fluid is sprayed onto the outer circumference of the milling wheels during milling via a cleaning device, whereby soil material adhering to the milling wheels is loosened.
  • a trench wall cutter 10 according to the invention with a milling frame 12 is in the Figures 1 to 4 shown in the different views.
  • first milling wheels 14 are mounted in pairs on a first gear plate 11a so that they can rotate about a common axis of rotation and on a second gear plate 11b a pair of second milling wheels 15 are rotatably mounted together about another axis of rotation.
  • the milling wheels 14, 15 each have a drum-shaped hub 17, on the outer circumference of which a multiplicity of milling teeth 20 with milling tooth holders 18 are attached.
  • the milling teeth 20 are detachably mounted in the milling tooth holders 18.
  • the milling tooth holders 18 with the milling teeth 20 are arranged along the outer circumference of each milling wheel 14, 15 in annular rows of milling teeth 22, as illustrated in FIGS Figures 3 and 4 emerges.
  • the individual rows of milling teeth 22 are axially spaced from one another, so that annular spaces 24 are formed between them.
  • soil materials can adhere to the milling teeth 20, the milling tooth holders 18 and in the spaces 24 between the milling teeth 20 and the milling tooth holders 18, in particular when milling cohesive soil, such as clay.
  • plate-shaped clearing plates 50 are attached to the underside of the milling frame 12 and engage in a comb-like manner in the annular spaces 24 between the cutting teeth 20 in order to mechanically scrape off adhering soil material.
  • the clearing plates 50 are attached to both sides of a central discharge device 30, which is designed to suck off milling fluid from the milling slot that has been created.
  • the discharge device 30 has a suction box 32 which extends parallel to the axes of rotation and tapers downwards. On its underside, the suction box 32 is provided with a plurality of suction openings 34, as can be seen Fig. 3 can be found.
  • the trench wall cutter 10 shown here is designed to carry out a milling process in which the removed soil material together with the surrounding support or milling fluid from the working area of the milling wheels 14, 15 is sucked off and removed after days.
  • a corresponding feed device 30 can also be provided, through which milling liquid is fed into the area between the milling wheels 14, 15.
  • Such a trench wall cutter 10 would be designed to carry out a milling process in which the removed soil material is mixed in situ in the milling slot together with the milling liquid to form a suspension, which preferably hardens after the trench wall cutter 10 has been removed from the milling slot and thus becomes a diaphragm wall segment or diaphragm wall panel for a Diaphragm wall hardens.
  • a cleaning device 40 with cleaning nozzles 46 which are directed towards the outer circumference of the milling wheels 14, 15, is arranged on both sides at a distance from the discharge device 30.
  • a part of the cleaning device 40 is enlarged in FIG Fig. 5 shown.
  • the cleaning device 40 has two clamp-like holding frames 41, one of which is holding frame 41 in FIG Fig. 5 is shown.
  • a nozzle rail 42 is attached, which is spaced from the discharge device 30 and is directed parallel to the axes of rotation of the milling wheels 14, 15.
  • the two nozzle rails 42 of two opposite milling wheels 14, 15 are connected to a feed pump (not shown) via a feed line 44, which is only partially shown.
  • a cleaning fluid in particular a liquid under pressure, can be supplied via the supply pump via the supply lines 44 to the nozzle rails 42.
  • adjustable rod-shaped cleaning nozzles 46 are attached via clamping nuts 48.
  • the cleaning nozzles 46 can be loosened by means of the clamping nuts 48 and their alignment can be changed at least in certain areas and thus adjusted to the respective arrangement of milling teeth 20 on the milling wheels 14, 15.
  • the cleaning nozzles 46 have nozzle openings from which the cleaning fluid exits under pressure in order to loosen soil material adhering to the milling teeth 20 and the milling tooth holders 18 during the milling operation.
  • the cleaning nozzles 46 engage in the annular intermediate spaces 24 in the manner of a comb.
  • the feed pump for injecting the cleaning fluid into the cleaning nozzles 46 can preferably be arranged on the milling frame 12 of the trench wall cutter 10.
  • the milling fluid that is located in the milling slot can preferably be used as the cleaning fluid.
  • the cleaning device 40 being able to detach adhering soil material from the milling wheels 14, 15 during milling operation with the milling wheels 14, 15 turning.

Description

Die Erfindung betrifft eine Schlitzwandfräse zum Erstellen eines Frässchlitzes im Boden mit einem Fräsrahmen, mindestens einem Paar von Fräsrädern, welche drehbar an dem Fräsrahmen gelagert und angetrieben sind, wobei jedes Fräsrad entlang seines Außenumfangs eine Vielzahl von Fräszähnen aufweist, und einer Zuführ- und/oder Abführeinrichtung zum Zuführen einer Fräsflüssigkeit in den beziehungsweise aus dem Frässchlitz im Bereich der Fräsräder, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a trench wall cutter for creating a milling slot in the ground with a milling frame, at least one pair of milling wheels which are rotatably mounted and driven on the milling frame, each milling wheel having a plurality of milling teeth along its outer circumference, and a feed and / or Discharge device for feeding a milling liquid into or out of the milling slot in the area of the milling wheels, according to the preamble of claim 1.

Weiterhin betrifft die Erfindung ein Verfahren zum Erstellen eines Frässchlitzes im Boden mit einer solchen Schlitzwandfräse, wobei die Fräsräder drehend angetrieben werden und die Schlitzwandfräse in den Boden abgeteuft und Bodenmaterial abgefräst wird, wobei der Frässchlitz im Boden erstellt wird, gemäß dem Oberbegriff des Anspruchs 12.Furthermore, the invention relates to a method for creating a milling trench in the ground with such a trench wall cutter, wherein the cutting wheels are driven to rotate and the trench wall cutter is sunk into the ground and soil material is milled off, the milling slot being created in the soil, according to the preamble of claim 12.

Eine gattungsgemäße Schlitzwandfräse mit einer Reinigungsvorrichtung für die Fräsräder geht aus der EP 2 703 565 A1 hervor.A trench wall cutter of the generic type with a cleaning device for the cutting wheels is based on the EP 2 703 565 A1 emerged.

Solche Schlitzwandfräsen werden zur Erstellung von sogenannten Schlitzwänden oder Dichtwänden eingesetzt, welche etwa zur Sicherung oder Abdichtung von Baugruben benötigt werden. Mittels einer Schlitzwandfräse wird dabei ein erster Frässchlitz erstellt, welcher mit einer aushärtbaren Masse verfüllt wird. Diese Masse härtet zu einem Schlitzwandsegment aus. Durch eine Aneinanderreihung mehrerer Schlitzwandsegmente kann so eine Schlitzwand in einer gewünschten Größe erstellt werden.Such trench wall cutters are used to create so-called diaphragm walls or sealing walls, which are required for securing or sealing construction pits, for example. A trench wall cutter is used to create a first cut slot which is filled with a hardenable compound. This mass hardens to form a diaphragm wall segment. By stringing together several diaphragm wall segments, a diaphragm wall can be created in a desired size.

Aus der EP 1 452 645 A1 geht eine weitere Schlitzwandfräse zum Erstellen einer Schlitzwand im Boden hervor. Zwischen den zwei Fräsradpaaren mündet eine Zuführeinrichtung, mittels welcher eine abbindbare Flüssigkeit in den Frässchlitz in den Bereich zwischen den Fräsrädern eingeleitet werden kann. Die zugeführte abbindbare Flüssigkeit wird dabei durch die Drehbewegung der Fräsräder mit dem abgefrästen Bodenmaterial zu einer aushärtbaren Masse vermengt, welche dann zu dem Schlitzwandsegment aushärten kann. Bei diesem bekannten Verfahren wird das abgefräste Bodenmaterial unmittelbar in situ im Frässchlitz zu der aushärtbaren Masse vermengt.From the EP 1 452 645 A1 Another diaphragm wall cutter emerges for creating a diaphragm wall in the ground. A feed device opens between the two pairs of cutting wheels, by means of which a settable liquid can be introduced into the cutting slot in the area between the cutting wheels. The liquid which can be set is supplied with the milled soil material by the rotary movement of the milling wheels mixed to a hardenable mass, which can then harden to the slit wall segment. In this known method, the milled soil material is mixed directly in situ in the milling slot to form the hardenable mass.

Ein anderes Verfahren zum Herstellen eines Schlitzwandsegmentes im Boden geht aus der DE 41 41 629 A1 hervor. Bei der hierfür eingesetzten Schlitzwandfräse ist zwischen den Fräsrädern eine Abführeinrichtung vorgesehen, mit welcher das abgefräste Bodenmaterial unmittelbar mit im Frässchlitz befindender Stützflüssigkeit nach über Tage abgesaugt wird. Die abgesaugte Suspension kann in einer Trenneinrichtung von Bodenmaterial entreichert und wieder in einen oberen Bereich des Frässchlitzes rückgeführt werden. Die Suspension kann dabei so aufbereitet werden, dass diese eine aushärtbare Masse darstellt, welche im Frässchlitz zu dem Schlitzwandsegment aushärtet.Another method for producing a diaphragm wall segment in the ground is based on DE 41 41 629 A1 emerged. In the trench wall cutter used for this purpose, a discharge device is provided between the cutting wheels, with which the milled soil material is sucked off above ground directly with the support liquid located in the milling slot. The extracted suspension can be depleted of soil material in a separating device and returned to an upper area of the milling trench. The suspension can be prepared in such a way that it represents a hardenable mass which hardens in the milling slot to form the slit wall segment.

Beim Erstellen eines Frässchlitzes mittels einer Schlitzwandfräse besteht grundsätzlich das Problem, dass beim Fräsen in bindigen Böden, also beispielsweise in Ton, Schluff, Tonstein etc., der durch die Fräsräder abgetragene Boden an den Fräszähnen der Fräsräder anhaftet und die Fräsräder so verkleben kann. Dies kann dazu führen, dass das Verkleben so stark ist, dass die Schlitzwandfräse aus dem Frässchlitz herausgezogen werden muss, um die Fräsräder mechanisch zu reinigen. Da Frässchlitze eine Tiefe von 40 Metern und mehr erreichen können, stellt dies einen hohen zeitlichen Aufwand und damit einen ökonomischen Nachteil dar. Die Tagesfräsleistung einer Schlitzwandfräse kann dadurch merklich herabgesetzt werden.When creating a milling slot using a trench wall cutter, there is a fundamental problem that when milling in cohesive soils, e.g. in clay, silt, mudstone, etc., the soil removed by the milling wheels adheres to the milling teeth of the milling wheels and can thus stick the milling wheels together. This can lead to the sticking being so strong that the trench wall cutter has to be pulled out of the cutting slot to mechanically clean the cutting wheels. Since milling trenches can reach a depth of 40 meters and more, this represents a high expenditure of time and thus an economic disadvantage. The daily milling performance of a trench wall cutter can be significantly reduced as a result.

Zum Lösen von anhaftendem Bodenmaterial zwischen ringförmigen Reihen von Fräszähnen an einem Fräsrad ist es etwa aus der EP 2 685 007 A1 bekannt, am Fräsradrahmen sogenannte Räumerplatten zu befestigen, welche in die Zwischenräume zwischen die ringförmigen Reihen von Fräszähnen hineinragen. Allerdings müssen die Räumerplatten einen gewissen Abstand von den Fräsrädern und den Fräszähnen einhalten, so dass hierdurch nur ein teilweises Entfernen von anhaftendem Bodenmaterial erreicht werden kann.For loosening adhering soil material between ring-shaped rows of cutting teeth on a cutting wheel, it is about from the EP 2 685 007 A1 known to attach so-called scraper plates on the milling wheel frame, which protrude into the spaces between the annular rows of milling teeth. However, the clearing plates must maintain a certain distance from the cutting wheels and the cutting teeth, so that only a partial removal of adhering soil material can be achieved in this way.

Der Erfindung liegt die Aufgabe zugrunde, eine Schlitzwandfräse und ein Verfahren zum Erstellen eines Frässchlitzes im Boden anzugeben, mit welchen ein Frässchlitz besonders effizient hergestellt werden kann.The invention is based on the object of specifying a trench wall cutter and a method for creating a milling slot in the ground with which a milling slot can be produced particularly efficiently.

Die Aufgabe wird nach der Erfindung durch eine Schlitzwandfräse mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 12 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a trench wall cutter with the features of claim 1 and by a method with the features of claim 12. Preferred embodiments of the invention are given in the dependent claims.

Bei der erfindungsgemäßen Schlitzwandfräse ist vorgesehen, dass beabstandet von der Zuführ- und/oder Abführeinrichtung eine Reinigungsvorrichtung zum Reinigen der Fräsräder im Fräsbetrieb mit einem Reinigungsfluid vorgesehen ist und dass die Reinigungsvorrichtung eine Vielzahl von Reinigungsdüsen aufweist, welche auf den Außenumfang zumindest eines Fräsrades gerichtet sind und zum Einspritzen des Reinigungsfluides zum Lösen von anhaftendem Bodenmaterial ausgebildet sind.In the trench wall cutter according to the invention it is provided that a cleaning device for cleaning the milling wheels in milling operation with a cleaning fluid is provided at a distance from the feed and / or discharge device and that the cleaning device has a plurality of cleaning nozzles which are directed at the outer circumference of at least one milling wheel and are designed for injecting the cleaning fluid to loosen adhering soil material.

Ein Aspekt der Erfindung besteht darin, beabstandet oder getrennt von der Zuführ- und/oder Abführeinrichtung für eine Fräsflüssigkeit eine Reinigungsvorrichtung vorzusehen, durch welche mittels eines Reinigungsfluides die Fräsräder im Fräsbetreib gereinigt werden können. Mittels eines Reinigungsfluides können die Fräsräder und insbesondere die Fräszähne besonders zuverlässig und ohne wesentlichen Verschleiß im Fräsbetrieb gereinigt werden, bei dem die Fräsräder rotieren und Bodenmaterial abarbeiten.One aspect of the invention consists in providing a cleaning device at a distance from or separately from the feed and / or discharge device for a milling fluid, by means of which the milling wheels can be cleaned during milling by means of a cleaning fluid. By means of a cleaning fluid, the milling wheels and in particular the milling teeth can be cleaned particularly reliably and without substantial wear in the milling operation, in which the milling wheels rotate and cut off soil material.

Dabei ist es ein Aspekt der Erfindung, dass die Reinigungsvorrichtung eine Vielzahl von Reinigungsdüsen aufweist, welche auf den Außenumfang zumindest eines Fräsrades gerichtet sind und zum Einspritzen des Reinigungsfluides zum Lösen von an den Fräszähnen anhaftendem Bodenmaterial ausgebildet sind. Das Reinigungsfluid kann dabei eine Flüssigkeit oder ein Gas oder ein Gas- Flüssigkeitsgemisch sein. Die Reinigungsdüsen sind dabei von der Zuführeinrichtung für Fräsflüssigkeit beabstandet, welche zum Betrieb der Fräse eine relativ große Menge an Fräsflüssigkeit bei einem Fräsverfahren mit in situ-Vermischung in den Frässchlitz zuführt. Durch die Anordnung einer Vielzahl von Reinigungsdüsen, welche speziell auf die Fräsräder und insbesondere die Fräszähne und Zahnhalter ausgerichtet sind, kann ein gezieltes Lösen von anhaftendem Bodenmaterial erreicht werden. Hierdurch weisen die Fräsräder auch bei längeren Betriebszeiten beim Abfräsen von bindigem Bodenmaterial eine weitgehend gleichbleibend hohe Fräsleistung auf, ohne dass der Fräsbetrieb für eine Reinigung der Schlitzwandfräse über Tage unterbrochen werden müsste. Dies erhöht nicht nur die Tagesfräsleistung einer Fräse, sondern führt auch zu einer verbesserten Qualität der aushärtbaren Masse im Frässchlitz, da der Frässchlitz vorzugsweise in einem Hub der Schlitzwandfräse bearbeitet werden kann. Zudem reduziert sich der Fräswiderstand und damit der Energieverbrauch.It is one aspect of the invention that the cleaning device has a plurality of cleaning nozzles which are directed at the outer circumference of at least one milling wheel and are designed to inject the cleaning fluid to loosen soil material adhering to the milling teeth. The cleaning fluid can be a liquid or a gas or a gas-liquid mixture. The cleaning nozzles are at a distance from the feed device for milling fluid, which feeds a relatively large amount of milling fluid into the milling slot in a milling process with in situ mixing in order to operate the milling machine. By arranging a large number of cleaning nozzles, which are specifically aligned with the milling wheels and in particular the milling teeth and tooth holders, a targeted detachment of adhering soil material can be achieved. As a result, the milling wheels have a largely consistently high milling performance even with longer operating times when milling cohesive soil material, without the milling operation having to be interrupted for cleaning the trench wall cutter for days. This not only increases the daily milling performance of a milling machine, but also leads to an improved quality of the hardenable Mass in the milling slot, since the milling slot can preferably be machined in one stroke of the trench wall cutter. In addition, the milling resistance and thus the energy consumption are reduced.

Eine bevorzugte Ausführungsform der erfindungsgemäßen Schlitzwandfräse besteht darin, dass zwei Paare von Fräsrädern vorgesehen sind und dass die Zuführ- und/oder Abführeinrichtung in einer Mitte zwischen den beiden Fräsrädern angeordnet ist. Die Fräsräder eines Paares sind dabei um eine gemeinsame Drehachse drehbar gelagert. Die Drehachse ist dabei vorzugsweise horizontal im Fräsbetrieb angeordnet. Die Drehachsen der beiden Paare sind parallel angeordnet. Die Zuführ- und/oder Abführeinrichtung ist dabei in der Mitte zwischen den beiden Fräsrädern angeordnet, so dass die Fräsflüssigkeit mittig zugeführt beziehungsweise abgeführt werden kann. Die Reinigungsvorrichtung mit den Reinigungsdüsen für die einzelnen Fräsräder sind dabei jeweils von der Mitte seitlich zu den jeweiligen Fräsrädern beabstandet angeordnet.A preferred embodiment of the trench wall cutter according to the invention consists in that two pairs of cutting wheels are provided and that the feed and / or discharge device is arranged in a center between the two cutting wheels. The milling wheels of a pair are rotatably mounted about a common axis of rotation. The axis of rotation is preferably arranged horizontally in the milling mode. The axes of rotation of the two pairs are arranged in parallel. The feed and / or discharge device is arranged in the middle between the two milling wheels, so that the milling liquid can be fed or discharged centrally. The cleaning device with the cleaning nozzles for the individual milling wheels are each arranged at a distance from the center laterally to the respective milling wheels.

In einer einfachen Ausführung können feste Reinigungsdüsen vorgesehen sein. Insbesondere zur Einstellung an veränderte Böden und Zahnanordnungen ist es nach einer Weiterbildung der Erfindung bevorzugt, dass die Reinigungsdüsen verstellbar gelagert sind. Es können dabei beispielsweise Kugeldüsen vorgesehen sein, die mittels einer entsprechenden Überwurfmutter in einer eingestellten Position festgespannt werden können.In a simple embodiment, fixed cleaning nozzles can be provided. In particular for adjustment to changed floors and tooth arrangements, it is preferred according to a further development of the invention that the cleaning nozzles are adjustable. For example, ball nozzles can be provided that can be clamped in a set position by means of a corresponding union nut.

Gemäß einer weiteren Ausbildung der Erfindung ist es vorteilhaft, dass die Reinigungsvorrichtung Düsenschienen aufweist, wobei jeweils eine Düsenschiene entlang des Außenumfangs von jedem Fräsrad angeordnet ist und etwa parallel zur Drehachse des Fräsrades verläuft. Grundsätzlich können je Fräsrad auch mehrere Düsenschienen vorgesehen sein. Eine Düsenschiene kann als eine sogenannte common rail bezeichnet werden, welche über eine Zuführleitung von einer zentralen Druckerzeugungseinrichtung, insbesondere einer Einspritzpumpe, mit Reinigungsfluid versorgt wird. Über entsprechende Einstellventile an den einzelnen Reinigungsdüsen oder den Düsenschienen können auch unterschiedliche Einspritzmengen und Einspritzdrücke an den einzelnen Reinigungsdüsen vorgesehen und eingestellt werden.According to a further embodiment of the invention, it is advantageous that the cleaning device has nozzle rails, one nozzle rail being arranged along the outer circumference of each milling wheel and running approximately parallel to the axis of rotation of the milling wheel. In principle, several nozzle rails can also be provided for each milling wheel. A nozzle rail can be referred to as a so-called common rail, which is supplied with cleaning fluid via a supply line from a central pressure generating device, in particular an injection pump. Using corresponding adjustment valves on the individual cleaning nozzles or the nozzle rails, different injection quantities and injection pressures can also be provided and set on the individual cleaning nozzles.

Eine solche Schlitzwandfräse ist vorzugsweise dadurch weitergebildet, dass an der Düsenschiene stabförmige Reinigungsschienen angebracht sind, dass die Fräszähne an einem Fräsrad in ringförmigen Fräszahnreihen angeordnet sind, welche unter Ausbildung von ringförmigen Zwischenraumen zueinander axial beabstandet sind, und dass die stabförmigen Reinigungsdüsen in die ringförmigen Zwischenräume hineinragen. Insbesondere beim Abfräsen von bindigen Böden werden Fräsräder eingesetzt, bei welchen die Fräszähne in axial zueinander versetzten ringförmigen Fräszahnreihen am Außenumfang eines Fräsrades angeordnet sind. Zwischen den ringförmigen Fräszahnreihen werden ringförmige Zwischenräume gebildet, in die die stabförmigen Reinigungsdüsen hineinragen. Die stabförmigen Reinigungsdüsen erstrecken sich dabei von der jeweiligen Düsenschiene in Richtung zur Fräsradmitte. Die stabförmigen Reinigungsdüsen können eine Düsenöffnung oder auch mehrere Düsenöffnungen aufweisen, so dass gezielte Düsenstrahlen auf die Fräszähne in den Fräszahnreihen oder den Außenumfang der Fräsräder gerichtet werden können. An den Reinigungsöffnungen können verstellbare Düsen vorgesehen sein.Such a trench wall cutter is preferably developed in that rod-shaped cleaning rails are attached to the nozzle rail and that the cutting teeth are attached a milling wheel are arranged in annular rows of milling teeth which are axially spaced from one another to form annular interspaces, and that the rod-shaped cleaning nozzles protrude into the annular interspaces. In particular when milling cohesive soils, milling wheels are used in which the milling teeth are arranged in axially offset annular milling tooth rows on the outer circumference of a milling wheel. Between the annular rows of milling teeth, annular spaces are formed into which the rod-shaped cleaning nozzles protrude. The rod-shaped cleaning nozzles extend from the respective nozzle rail in the direction of the milling wheel center. The rod-shaped cleaning nozzles can have one nozzle opening or also several nozzle openings, so that targeted nozzle jets can be directed onto the milling teeth in the milling teeth rows or the outer circumference of the milling wheels. Adjustable nozzles can be provided at the cleaning openings.

Eine besonders gute Reinigung wird nach der Erfindung dadurch erreicht, dass am Fräsrahmen Räumerplatten zum Abstreifen von anhaftendem Bodenmaterial von den Fräsrädern angeordnet sind. Räumerplatten sind grundsätzlich aus dem Stand der Technik bekannt. Es handelt sich hierbei um mechanische Abstreifeinrichtungen, die vorzugsweise in die ringförmigen Zwischenräume zwischen den ringförmigen Fräszahnreihen reichen, um dort befindliches Bodenmaterial aus den Zwischenräumen abzustreifen. Allerdings sind die mechanischen Räumerplatten in einem gewissen Abstand zu den Fräszahnreihen anzuordnen, um im Fräsbetreib Kollisionen zu vermeiden, die aufgrund von Schwingungen der einzelnen Maschinenteile im Betreib auftreten könnten. Ergänzend zu dieser mechanischen Reinigung kann verbliebenes Restbodenmaterial durch das Reinigungsfluid mit der erfindungsgemäßen Reinigungsvorrichtung entfernt werden.A particularly good cleaning is achieved according to the invention in that clearing plates are arranged on the milling frame for stripping off adhering soil material from the milling wheels. Clearing plates are basically known from the prior art. These are mechanical stripping devices which preferably extend into the annular gaps between the annular rows of milling teeth in order to scrape soil material located there from the gaps. However, the mechanical clearing plates must be arranged at a certain distance from the rows of milling teeth in order to avoid collisions during milling that could occur due to vibrations of the individual machine parts during operation. In addition to this mechanical cleaning, remaining floor material can be removed by the cleaning fluid with the cleaning device according to the invention.

Nach der Erfindung ist vorgesehen, dass die Reinigungsdüsen in die Räumerplatten integriert oder nahe zu diesen angebracht sind. So können die Räumerplatten selbst als hohle Platten ausgebildet sein, wobei der Hohlraum als Zuführung von Reinigungsfluid zu den Reinigungsdüsen an den Räumerplatten dient. Alternativ können insbesondere die stabförmigen Reinigungsdüsen an einerAccording to the invention it is provided that the cleaning nozzles are integrated into the scraper plates or are attached close to them. Thus, the scraper plates themselves can be designed as hollow plates, the cavity serving as a supply of cleaning fluid to the cleaning nozzles on the scraper plates. Alternatively, the rod-shaped cleaning nozzles in particular can be attached to a

Außenseite der Räumerplatten angebracht sein, um verbliebenes restliches Bodenmaterial von den Fräszähnen zu entfernen.Be attached to the outside of the scraper plates to remove any remaining soil material from the cutting teeth.

Eine besonders gute Reinigung wird gemäß einer Ausführungsvariante der Erfindung dadurch erzielt, dass die Düsenschienen über Zuleitungen mit mindestens einer Einspritzpumpe verbunden sind, mit der das Reinigungsfluid unter Druck einspritzbar ist. Die Einspritzpumpe kann über Tage oder am Fräsrahmen der Schlitzwandfräse angeordnet sein.According to a variant embodiment of the invention, particularly good cleaning is achieved in that the nozzle rails are connected via feed lines to at least one injection pump with which the cleaning fluid can be injected under pressure. The injection pump can be arranged above ground or on the milling frame of the trench wall cutter.

Dabei ist es nach einer Ausgestaltungsvariante der Erfindung bevorzugt, dass eine Steuereinrichtung vorgesehen ist, mit der der Einspritzdruck und/oder eine Einspritzmenge des Reinigungsfluides einstellbar ist. Hierbei kann abhängig von der Adhäsionseigenschaft des abzufräsenden Bodenmaterials ein ausreichender Einspritzdruck und eine ausreichende Einspritzmenge an Reinigungsfluid eingestellt werden, um die Fräszähne zuverlässig von Bodenmaterial zu reinigen. Gleichzeitig kann über die Steuereinrichtung im Bereich der Fräsräder auch ein gewünschter Druck eingestellt werden, der sich positiv auf das Fräsen und das Vermischen von abgefrästem Bodenmaterial mit Fräsflüssigkeit auswirken kann.According to one embodiment of the invention, it is preferred that a control device is provided with which the injection pressure and / or an injection quantity of the cleaning fluid can be set. Here, depending on the adhesion property of the soil material to be milled, a sufficient injection pressure and a sufficient injection quantity of cleaning fluid can be set in order to reliably clean the milling teeth of soil material. At the same time, the control device can also be used to set a desired pressure in the area of the milling wheels, which can have a positive effect on milling and mixing of milled soil material with milling fluid.

Grundsätzlich kann als Reinigungsfluid ein Gas oder eine beliebige Flüssigkeit eingesetzt werden. Besonders vorteilhaft ist es nach einer Weiterbildung der Erfindung, dass das Reinigungsfluid der Fräsflüssigkeit entspricht. Insbesondere kann das Reinigungsfluid eine aushärtbare Suspension, insbesondere eine Zementsuspension, sein, die zum Ablösen von Bodenmaterial eingesetzt wird. Dabei kann das unter Druck eingespritzte Reinigungsfluid gleichzeitig ein Vermischen des abgefrästen Bodenmaterials unterstützen, so dass sich insbesondere bei einem in situ-Verfahren eines besonders gute aushärtbare Suspension zum Bilden des Schlitzwandelementes einstellt. Als Reinigungsfluid kann auch Wasser vorgesehen werden, um etwa am Ende eines Betriebstages die Fräsräder durch die Reinigungsvorrichtung außerhalb des Frässchlitzes zu reinigen.In principle, a gas or any liquid can be used as the cleaning fluid. According to a development of the invention, it is particularly advantageous that the cleaning fluid corresponds to the milling fluid. In particular, the cleaning fluid can be a hardenable suspension, in particular a cement suspension, which is used to remove soil material. The cleaning fluid injected under pressure can at the same time support mixing of the milled soil material, so that a particularly good hardenable suspension for forming the diaphragm wall element is established, particularly in the case of an in situ method. Water can also be provided as the cleaning fluid in order, for example, at the end of an operating day to clean the milling wheels by the cleaning device outside the milling slot.

Eine weitere bevorzugte Ausführungsform der Erfindung besteht darin, dass die Zuführeinrichtung eine Zuführpumpe zum Zuführen der Fräsflüssigkeit aufweist, wobei die Fräsflüssigkeit und das Reinigungsfluid mit den Fräsrädern im Frässchlitz mit abgefrästem Bodenmaterial zu einer aushärtbaren Suspension vermischt werden. Bei einer solchen Schlitzwandfräse für ein in situ Fräs- und Mischverfahren wird vorzugsweise als Reinigungsfluid die Fräsflüssigkeit verwendet. Die Zuführpumpe am Fräsrahmen kann dabei sowohl die Fräsflüssigkeit zu der Zuführeinrichtung als auch das Reinigungsfluid zu den Reinigungsdüsen leiten. Hierdurch kann ein besonders effizienter Aufbau der Schlitzwandfräse erreicht werden.Another preferred embodiment of the invention is that the feed device has a feed pump for feeding the milling liquid, the milling liquid and the cleaning fluid being mixed with the milling wheels in the milling slot with milled soil material to form a hardenable suspension. In such a trench wall cutter for an in situ milling and mixing process is preferably used as Cleaning fluid uses the milling fluid. The feed pump on the milling frame can convey both the milling fluid to the feed device and the cleaning fluid to the cleaning nozzles. A particularly efficient construction of the trench wall cutter can be achieved in this way.

Alternativ kann nach einer Weiterbildung der Erfindung vorgesehen sein, dass die Abführeinrichtung eine Absaugpumpe aufweist, mit welcher Fräsflüssigkeit mit dem Reinigungsfluid und abgefrästem Bodenmaterial aus dem Frässchlitz abgesaugt wird. Bei diesem Fräsverfahren wird über einen sogenannten Saugkasten am unteren Ende der Schlitzwandfräse mittels der Absaugpumpe und der Abführeinrichtung, welche eine oder mehrere Absaugöffnungen aufweist, aus dem Frässchlitz Fräsflüssigkeit unterhalb des Fräsrahmens abgesaugt.Alternatively, according to a further development of the invention, it can be provided that the discharge device has a suction pump with which milling liquid with the cleaning fluid and milled soil material is sucked out of the milling slot. In this milling process, a so-called suction box at the lower end of the trench wall cutter is used to suck off milling fluid from the milling slot below the milling frame by means of the suction pump and the discharge device, which has one or more suction openings.

Weiterhin ist es bei einer erfindungsgemäßen Schlitzwandfräse bevorzugt, dass an einem oberen Ende des Fräsrahmens ein Seil oder eine Stange angebracht ist, mit welcher die Schlitzwandfräse an einem Trägergerät aufgehängt und vertikal verstellbar ist. Eine Reinigung der Fräsräder im Fräsbetrieb kann dabei sowohl beim Abfräsen des Bodenmaterials als auch während einer Hubbewegung mittels des Seils oder der Stange erfolgen.Furthermore, it is preferred in a trench wall cutter according to the invention that a rope or a rod is attached to an upper end of the milling frame, with which the trench wall cutter is suspended from a carrier device and vertically adjustable. The milling wheels can be cleaned during milling operation both when milling the ground material and during a lifting movement by means of the rope or the rod.

Das erfindungsgemäße Verfahren zum Fräsen eines Frässchlitzes im Boden mit der vorgenannten Schlitzwandfräse ist dadurch gekennzeichnet, dass beim Fräsen über eine Reinigungsvorrichtung ein Reinigungsfluid auf den Außenumfang der Fräsräder gespritzt wird, wobei an den Fräsrädern anhaftendes Bodenmaterial gelöst wird. Mit dem erfindungsgemäßen Verfahren können die zuvor beschriebenen Vorteile beim Einsatz einer erfindungsgemäßen Schlitzwandfräse erreicht werden.The method according to the invention for milling a milling trench in the ground with the aforementioned trench wall milling machine is characterized in that a cleaning fluid is sprayed onto the outer circumference of the milling wheels during milling via a cleaning device, whereby soil material adhering to the milling wheels is loosened. With the method according to the invention, the advantages described above can be achieved when using a trench wall cutter according to the invention.

Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels näher beschrieben, welches schematisch in den Figuren dargestellt ist. In den Figuren zeigen:

Fig. 1
eine perspektivische Ansicht eines unteren Teiles einer erfindungsgemäßen Schlitzwandfräse mit den Fräsrädern;
Fig. 2
eine Vorderansicht der Schlitzwandfräse von Fig. 1;
Fig. 3
eine Seitenansicht der Schlitzwandfräse der Figuren 1 und 2;
Fig. 4
eine Ansicht der Schlitzwandfräse von den Figuren 1 bis 3 von unten; und
Fig. 5
eine perspektivische Ansicht eines Teils der Reinigungsvorrichtung für die Fräsräder.
The invention is described in more detail below with reference to a preferred exemplary embodiment which is shown schematically in the figures. In the figures show:
Fig. 1
a perspective view of a lower part of a trench wall cutter according to the invention with the cutting wheels;
Fig. 2
a front view of the trench wall cutter of Fig. 1 ;
Fig. 3
a side view of the trench wall cutter of Figures 1 and 2 ;
Fig. 4
a view of the trench wall cutter from the Figures 1 to 3 from underneath; and
Fig. 5
a perspective view of part of the cleaning device for the milling wheels.

Eine erfindungsgemäße Schlitzwandfräse 10 mit einem Fräsrahmen 12 ist in den Figuren 1 bis 4 in den verschiedenen Ansichten dargestellt. An einem unteren Ende des Fräsrahmens 12, welcher nur teilweise dargestellt ist, sind an einem ersten Getriebeschild 11a paarweise erste Fräsräder 14 drehbar um eine gemeinsame Drehachse und an einem zweiten Getriebeschild 11 b ein Paar zweite Fräsräder 15 gemeinsam um eine andere Drehachse drehbar gelagert. Die Fräsräder 14, 15 weisen jeweils eine trommelförmige Nabe 17 auf, an deren Außenumfang eine Vielzahl von Fräszähnen 20 mit Fräszahnhaltern 18 angebracht sind. Die Fräszähne 20 sind lösbar in den Fräszahnhaltern 18 gelagert. Die Fräszahnhalter 18 mit den Fräszähnen 20 sind dabei entlang des Außenumfangs jedes Fräsräder 14, 15 in ringförmigen Fräszahnreihen 22 angeordnet, wie anschaulich aus den Figuren 3 und 4 hervorgeht. Die einzelnen Fräszahnreihen 22 sind dabei axial voneinander beabstandet, so dass zwischen diesen ringförmige Zwischenräume 24 gebildet sind.A trench wall cutter 10 according to the invention with a milling frame 12 is in the Figures 1 to 4 shown in the different views. At a lower end of the milling frame 12, which is only partially shown, first milling wheels 14 are mounted in pairs on a first gear plate 11a so that they can rotate about a common axis of rotation and on a second gear plate 11b a pair of second milling wheels 15 are rotatably mounted together about another axis of rotation. The milling wheels 14, 15 each have a drum-shaped hub 17, on the outer circumference of which a multiplicity of milling teeth 20 with milling tooth holders 18 are attached. The milling teeth 20 are detachably mounted in the milling tooth holders 18. The milling tooth holders 18 with the milling teeth 20 are arranged along the outer circumference of each milling wheel 14, 15 in annular rows of milling teeth 22, as illustrated in FIGS Figures 3 and 4 emerges. The individual rows of milling teeth 22 are axially spaced from one another, so that annular spaces 24 are formed between them.

Im Fräsbetrieb können sich an den Fräszähnen 20, den Fräszahnhaltern 18 und in den Zwischenräumen 24 zwischen den Fräszähnen 20 beziehungsweise den Fräszahnhaltern 18 Bodenmaterialien anheften, insbesondere beim Abfräsen von bindigem Boden, etwa Ton. Zum Entfernen von anhaftendem Bodenmaterial sind an der Unterseite des Fräsrahmens 12 plattenförmige Räumerplatten 50 befestigt, die kammartig in die ringförmigen Zwischenräume 24 zwischen den Fräszähnen 20 eingreifen, um anhaftendes Bodenmaterial mechanisch abzustreifen. Die Räumerplatten 50 sind dabei zu beiden Seiten einer mittigen Abführeinrichtung 30 angebracht, welche zum Absaugen von Fräsflüssigkeit aus dem erstellten Frässchlitz ausgebildet ist. Die Abführeinrichtung 30 weist dabei einen sich parallel zu den Drehachsen erstreckenden, sich nach untern verjüngenden Saugkasten 32 auf. An seiner Unterseite ist der Saugkasten 32 mit einer Vielzahl von Absaugöffnungen 34 versehen, wie anschaulich Fig. 3 zu entnehmen ist.In the milling operation, soil materials can adhere to the milling teeth 20, the milling tooth holders 18 and in the spaces 24 between the milling teeth 20 and the milling tooth holders 18, in particular when milling cohesive soil, such as clay. In order to remove adhering soil material, plate-shaped clearing plates 50 are attached to the underside of the milling frame 12 and engage in a comb-like manner in the annular spaces 24 between the cutting teeth 20 in order to mechanically scrape off adhering soil material. The clearing plates 50 are attached to both sides of a central discharge device 30, which is designed to suck off milling fluid from the milling slot that has been created. The discharge device 30 has a suction box 32 which extends parallel to the axes of rotation and tapers downwards. On its underside, the suction box 32 is provided with a plurality of suction openings 34, as can be seen Fig. 3 can be found.

Die in den Figuren 1 bis 4 dargestellte Schlitzwandfräse 10 ist dabei zum Ausführen eines Fräsverfahrens ausgebildet, bei welchem das abgetragene Bodenmaterial zusammen mit umgebender Stütz- oder Fräsflüssigkeit aus dem Arbeitsbereich der Fräsräder 14, 15 abgesaugt und nach über Tage abgefördert wird. Alternativ kann anstelle der Abführeinrichtung 30 auch eine entsprechende Zuführeinrichtung 30 vorgesehen sein, durch welche Fräsflüssigkeit in den Bereich zwischen den Fräsrädern 14, 15 zugeleitet wird. Eine derartige Schlitzwandfräse 10 wäre zum Durchführen eines Fräsverfahrens ausgebildet, bei dem in situ im Frässchlitz das abgetragene Bodenmaterial zusammen mit der Fräsflüssigkeit zu einer Suspension vermengt wird, die vorzugsweise nach Entfernen der Schlitzwandfräse 10 aus dem Frässchlitz aushärtet und so zu einem Schlitzwandsegment oder Schlitzwandpaneel für eine Schlitzwand aushärtet.The ones in the Figures 1 to 4 The trench wall cutter 10 shown here is designed to carry out a milling process in which the removed soil material together with the surrounding support or milling fluid from the working area of the milling wheels 14, 15 is sucked off and removed after days. Alternatively, instead of the discharge device 30, a corresponding feed device 30 can also be provided, through which milling liquid is fed into the area between the milling wheels 14, 15. Such a trench wall cutter 10 would be designed to carry out a milling process in which the removed soil material is mixed in situ in the milling slot together with the milling liquid to form a suspension, which preferably hardens after the trench wall cutter 10 has been removed from the milling slot and thus becomes a diaphragm wall segment or diaphragm wall panel for a Diaphragm wall hardens.

Gemäß der Erfindung ist zu beiden Seiten beabstandet zu der Abführeinrichtung 30 eine Reinigungseinrichtung 40 mit Reinigungsdüsen 46 angeordnet, welche auf den Außenumfang der Fräsräder 14, 15 gerichtet sind. Ein Teil der Reinigungsvorrichtung 40 ist vergrößert in Fig. 5 dargestellt. Die Reinigungsvorrichtung 40 weist zwei klammerartige Halterahmen 41 auf, von denen ein Halterahmen 41 in Fig. 5 gezeigt ist. Am unteren Ende des U-förmigen Halterahmens 41 ist dabei jeweils eine Düsenschiene 42 angebracht, welche beabstandet von der Abführeinrichtung 30 ist und parallel zu den Drehachsen der Fräsräder 14, 15 gerichtet ist. Die zwei Düsenschienen 42 von jeweils zwei gegenüberliegenden Fräsrädern 14, 15 sind über eine nur teilweise dargestellte Zuführleitung 44 mit einer nicht-dargestellten Zuführpumpe verbunden. Über die Zuführpumpe kann über die Zuführleitungen 44 zu den Düsenschienen 42 ein Reinigungsfluid, insbesondere eine Flüssigkeit unter Druck zugeführt werden.According to the invention, a cleaning device 40 with cleaning nozzles 46, which are directed towards the outer circumference of the milling wheels 14, 15, is arranged on both sides at a distance from the discharge device 30. A part of the cleaning device 40 is enlarged in FIG Fig. 5 shown. The cleaning device 40 has two clamp-like holding frames 41, one of which is holding frame 41 in FIG Fig. 5 is shown. At the lower end of the U-shaped holding frame 41, a nozzle rail 42 is attached, which is spaced from the discharge device 30 and is directed parallel to the axes of rotation of the milling wheels 14, 15. The two nozzle rails 42 of two opposite milling wheels 14, 15 are connected to a feed pump (not shown) via a feed line 44, which is only partially shown. A cleaning fluid, in particular a liquid under pressure, can be supplied via the supply pump via the supply lines 44 to the nozzle rails 42.

An einer Unterseite der Düsenschienen 42 sind über Spannmuttern 48 verstellbar stabförmige Reinigungsdüsen 46 angebracht. Durch die Spannmuttern 48 können die Reinigungsdüsen 46 gelöst und zumindest bereichsweise in ihrer Ausrichtung verändert und so auf die jeweilige Anordnung von Fräszähnen 20 an den Fräsrädern 14, 15 eingestellt werden. Die Reinigungsdüsen 46 weisen Düsenöffnungen auf, aus welchen unter Druck das Reinigungsfluid austritt, um an den Fräszähnen 20 und den Fräszahnhaltern 18 anhaftendes Bodenmaterial im Fräsbetrieb zu lösen. Die Reinigungsdüsen 46 greifen dabei kammartig in die ringförmigen Zwischenräume 24 ein.On an underside of the nozzle rails 42, adjustable rod-shaped cleaning nozzles 46 are attached via clamping nuts 48. The cleaning nozzles 46 can be loosened by means of the clamping nuts 48 and their alignment can be changed at least in certain areas and thus adjusted to the respective arrangement of milling teeth 20 on the milling wheels 14, 15. The cleaning nozzles 46 have nozzle openings from which the cleaning fluid exits under pressure in order to loosen soil material adhering to the milling teeth 20 and the milling tooth holders 18 during the milling operation. The cleaning nozzles 46 engage in the annular intermediate spaces 24 in the manner of a comb.

Die Zuführpumpe zum Einspritzen des Reinigungsfluides in die Reinigungsdüsen 46 kann vorzugsweise am Fräsrahmen 12 der Schlitzwandfräse 10 angeordnet sein. Vorzugsweise kann als Reinigungsfluid die Fräsflüssigkeit verwendet werden, die sich im Frässchlitz befindet.The feed pump for injecting the cleaning fluid into the cleaning nozzles 46 can preferably be arranged on the milling frame 12 of the trench wall cutter 10. The milling fluid that is located in the milling slot can preferably be used as the cleaning fluid.

Mit der beschriebenen erfindungsgemäßen Schlitzwandfräse 10 kann das zuvor beschriebene Verfahren zur Erstellung eines Frässchlitzes im Boden durchgeführt werden, wobei im Fräsbetrieb bei drehenden Fräsrädern 14, 15 anhaftendes Bodenmaterial von den Fräsrädern 14, 15 durch die Reinigungsvorrichtung 40 gelöst werden kann.With the inventive trench wall cutter 10 described above, the previously described method for creating a milling slot in the ground can be carried out, with the cleaning device 40 being able to detach adhering soil material from the milling wheels 14, 15 during milling operation with the milling wheels 14, 15 turning.

Claims (12)

  1. Trench cutter for producing a cut trench in the soil having
    - a cutter frame (12),
    - at least one pair of cutting wheels (14, 15) which are supported and driven in a rotatable manner on a lower end of the cutter frame (12), wherein each cutting wheel (14, 15) has a plurality of cutting teeth (20) along its outer circumference, and
    - a supply and/or discharge means (30) for supplying or discharging a cutting liquid to or from the cut trench in the region of the cutting wheels (14, 15),
    - wherein spaced from the supply and/or discharge means (30) a cleaning device (40) is provided for cleaning the cutting wheels (14, 15) during the cutting operation with a cleaning fluid and
    - wherein the cleaning device (40) has a plurality of cleaning nozzles (46) which are directed onto the outer circumference of at least one cutting wheel (14, 15) and designed to inject the cleaning fluid to loosen adhering soil material,
    characterized in that
    - on the cutter frame (12) reamer plates (50) are arranged for scraping off adhering soil material from the cutting wheels (14, 15), and
    - in that the cleaning nozzles (46) are integrated into the reamer plates (50) or fixed close thereto.
  2. Trench cutter according to claim 1,
    characterized in that
    two pairs of cutting wheels (14, 15) are provided and
    in that the supply and/or discharge means (30) is arranged in a center between the two cutting wheels (14, 15).
  3. Trench cutter according to claim 1 or 2,
    characterized in that
    the cleaning nozzles (46) are supported in an adjustable manner.
  4. Trench cutter according to any one of claims 1 to 3,
    characterized in that
    the cleaning device (40) has nozzle rails (42), wherein one nozzle rail (42) is in each case arranged along the outer circumference of each cutting wheel (14, 15) and runs approximately parallel to the axis of rotation of the cutting wheel (14, 15).
  5. Trench cutter according to claim 4,
    characterized in that
    on the nozzle rail (42) bar-shaped cleaning nozzles (46) are fixed,
    in that the cutting teeth (20) on a cutting wheel (14, 15) are arranged in annular cutting tooth rows (22) which, by forming annular spaces (24), are spaced axially from each other, and
    in that the bar-shaped cleaning nozzles (46) protrude into the annular spaces (24).
  6. Trench cutter according to any one of claims 4 or 5,
    characterized in that
    the nozzle rails (42) are connected via supply lines (44) to at least one injection pump, with which the cleaning fluid can be injected under pressure.
  7. Trench cutter according to claim 6,
    characterized in that
    a control means is provided, with which the injection pressure and/or an injection quantity of the cleaning fluid can be set.
  8. Trench cutter according to any one of claims 1 to 7,
    characterized in that
    the cleaning fluid corresponds to the cutting liquid.
  9. Trench cutter according to any one of claims 1 to 8,
    characterized in that
    the supply means (30) has a supply pump for supplying the cutting liquid, wherein by way of the cutting wheels (14, 15) the cutting liquid and the cleaning fluid are mixed in the cut trench with cut-off soil material to a hardenable suspension.
  10. Trench cutter according to any one of claims 1 to 9,
    characterized in that
    the discharge means (30) has a suction pump, with which cutting liquid, together with the cleaning fluid and cut-off soil material, is sucked out of the cut trench.
  11. Trench cutter according to any one of claims 1 to 10,
    characterized in that
    on an upper end of the cutter frame (12) a rope or a rod is fixed, with which the trench cutter (10) is suspended and vertically adjustable on a carrier implement.
  12. Method for cutting a cut trench in the soil with a trench cutter according to any one of claims 1 to 11,
    wherein the cutting wheels (14, 15) are driven in a rotating manner and the trench cutter (10) is sunk into the soil and soil material is cut off, wherein the cut trench is produced in the soil, and
    during cutting a cleaning fluid is sprayed via a cleaning device (40) onto the outer circumference of the cutting wheels (14, 15), wherein soil material adhering to the cutting wheels (14, 15) is loosened,
    characterized in that
    adhering soil material is scraped off from the cutting wheels (14, 15) by reamer plates (50) which are arranged on the cutter frame (12), and
    in that the cleaning fluid is sprayed onto the outer circumference of the cutting wheels (14, 15) by means of cleaning nozzles (46) which are integrated into the reamer plates (50) or fixed close thereto.
EP18163075.7A 2018-03-21 2018-03-21 Slurry wall mill and method for creating a milled slit in the ground Active EP3543408B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP18163075.7A EP3543408B1 (en) 2018-03-21 2018-03-21 Slurry wall mill and method for creating a milled slit in the ground
PCT/EP2019/055606 WO2019179770A1 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a trench in the ground
US16/982,015 US11236480B2 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a cut trench in the soil
CN201980020858.5A CN112154237A (en) 2018-03-21 2019-03-06 Trench wall cutter and method for producing a cutting trench in soil
CA3092741A CA3092741A1 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a cut trench in the soil
KR1020207027468A KR20200132888A (en) 2018-03-21 2019-03-06 Trench cutter and method for creating cut trenches in soil
JP2020550859A JP2021518500A (en) 2018-03-21 2019-03-06 Trench cutters and methods for creating cutting trenches in soil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18163075.7A EP3543408B1 (en) 2018-03-21 2018-03-21 Slurry wall mill and method for creating a milled slit in the ground

Publications (2)

Publication Number Publication Date
EP3543408A1 EP3543408A1 (en) 2019-09-25
EP3543408B1 true EP3543408B1 (en) 2020-10-21

Family

ID=61731682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18163075.7A Active EP3543408B1 (en) 2018-03-21 2018-03-21 Slurry wall mill and method for creating a milled slit in the ground

Country Status (7)

Country Link
US (1) US11236480B2 (en)
EP (1) EP3543408B1 (en)
JP (1) JP2021518500A (en)
KR (1) KR20200132888A (en)
CN (1) CN112154237A (en)
CA (1) CA3092741A1 (en)
WO (1) WO2019179770A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU208074U1 (en) * 2021-05-27 2021-12-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский государственный аграрный университет - МСХА имени К.А. Тимирязева" (ФГБОУ ВО РГАУ - МСХА имени К.А. Тимирязева) The working body of the sewer cleaning machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110792122A (en) * 2019-12-09 2020-02-14 江苏徐工工程机械研究院有限公司 Milling device and double-wheel slot milling machine
KR102373567B1 (en) * 2020-06-03 2022-03-11 (주)나우이엔에스 Control System And Method Of Trench Cutter
KR102461097B1 (en) * 2020-10-21 2022-10-31 강태영 cutting bite of trench cutter
DE102021115812A1 (en) 2021-06-18 2022-12-22 Liebherr-Werk Nenzing Gmbh diaphragm wall cutter
EP4239130A1 (en) * 2022-03-01 2023-09-06 BAUER Maschinen GmbH Slurry wall cutter and method for creating a cut in the ground

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2241383A (en) * 1938-12-22 1941-05-13 Barnett Pernel Tree root cutting machine
US3554602A (en) * 1968-07-24 1971-01-12 Sun Oil Co Excavating method and apparatus
DE2348431A1 (en) * 1972-10-03 1974-04-25 Atlas Copco Ab PROCESS FOR CUTTING SPLITTING MATERIALS, IN PARTICULAR ROCKS AND MINERALS, AND DEVICES FOR CARRYING OUT THE PROCESS
US4111490A (en) * 1975-09-05 1978-09-05 Liesveld Daniel J Method and apparatus for channel cutting of hard materials using high velocity fluid jets
US4091629A (en) * 1977-04-11 1978-05-30 Gunn Charles R Marine pipeline installation system
US4167292A (en) * 1977-11-22 1979-09-11 Eller Saul A Method of using a low temperature freezing softening and abrasion fluid
DE2810606A1 (en) * 1978-03-11 1979-09-20 Salzgitter Maschinen Ag CHISEL FOR A TOOL THAT WORKS IN THE STONE
US4240664A (en) * 1978-09-08 1980-12-23 Joy Manufacturing Company Hydraulic jet cutting tool and method
NL7904177A (en) * 1979-05-28 1980-12-02 Hollandsche Aanneming Bv METHOD FOR DREDGING SUBSTRATE GROUND MATERIAL AND AN APPARATUS FOR PERFORMING THE METHOD
DE2942304C2 (en) * 1979-10-19 1984-11-15 Preussag Ag, 3000 Hannover Und 1000 Berlin Order for the removal of marine sediments
US4282985A (en) * 1980-01-21 1981-08-11 Ray Yamamoto Seed plate
US4342526A (en) * 1980-06-05 1982-08-03 Applied Offshore Technology, Inc. Submersible backfill machine
US4397106A (en) * 1982-02-08 1983-08-09 Ellicott Machine Corporation Dredge bucket wheel structure
US4548442A (en) * 1983-12-06 1985-10-22 The Robbins Company Mobile mining machine and method
DE3346306A1 (en) * 1983-12-22 1985-07-04 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg BUCKET WHEEL EXCAVATOR
US4680879A (en) * 1985-06-28 1987-07-21 Pjh, Inc. Underwater dredging apparatus and cutter head therefor
US4877355A (en) * 1988-04-19 1989-10-31 Casper Colosimo & Son., Inc. Underwater cable laying system
JPH0637082Y2 (en) * 1988-06-21 1994-09-28 鹿島建設株式会社 Cutter-drum removal device
FR2639053B1 (en) * 1988-11-15 1991-09-06 France Etat Ponts Chaussees MANIPULATOR FOR PUBLIC WORKS MACHINERY AND MACHINE PROVIDED WITH SUCH A MANIPULATOR AND SERVING THE TREATMENT OF A PAVEMENT
US4946227A (en) * 1989-05-22 1990-08-07 Esso Resources Canada Limited Bucket wheel assembly
DE4141629C2 (en) 1991-12-17 1997-02-20 Bauer Spezialtiefbau Process for the production of sealing walls
US5275513A (en) * 1992-06-22 1994-01-04 E. I. Du Pont De Nemours And Company Apparatus and method for in-situ treatment of a medium
JP2591537Y2 (en) * 1992-09-29 1999-03-03 大成建設株式会社 Dust cutter attached soil removal device
WO1994025191A1 (en) * 1993-05-03 1994-11-10 Bruso Bruce L Method and apparatus for in situ soil remediation
JP2621762B2 (en) * 1993-06-01 1997-06-18 山▲さき▼建設株式会社 Continuous underground wall excavator
JP3001929U (en) * 1994-03-11 1994-09-06 株式会社ハンナンテックス Rock bit
FR2731024B1 (en) * 1995-02-28 1997-12-05 Sol Comp Du APPARATUS FOR EXCAVATING TRENCHES IN THE GROUND
BE1011744A4 (en) * 1998-02-13 1999-12-07 Dredging Int Method for through ground and rock layers using or-dredging excavators and by this method operating systems.
AU4185500A (en) * 1999-04-02 2000-10-23 Amvest Systems Inc. Water jet assisted drum-type mining system
JP2001020317A (en) * 1999-07-02 2001-01-23 Nippon Sharyo Seizo Kaisha Ltd Ground excavating device
DE10308538C5 (en) 2003-02-27 2014-11-06 Bauer Maschinen Gmbh Method of making a trench wall in the ground, trench wall cutter and trench wall cutter
SI1630298T1 (en) * 2004-08-23 2008-06-30 Bauer Maschinen Gmbh Method of making a slotted wall by means of a trench cutter
EP1640509B2 (en) * 2004-08-23 2014-03-05 BAUER Maschinen GmbH Method of making a sloted wall in ground and device therefor
ITTO20050503A1 (en) * 2005-07-22 2007-01-23 Soilmec Spa DEVICE AND METHOD OF MIXTURE OF LAND ON THE SITE FOR THE FORMATION OF UNDERGROUND WALLS OR DIAPHRAGMS.
US7604301B1 (en) * 2006-12-07 2009-10-20 Lang William J Dual axis grinder blender
US20120114427A1 (en) * 2010-11-04 2012-05-10 Dan Allen Soil Mixing System
US9085872B2 (en) * 2011-06-03 2015-07-21 Darin R. Kruse Lubricated soil mixing system and methods
ES2532477T3 (en) * 2012-07-10 2015-03-27 Bauer Maschinen Gmbh Milling wheel for a trench milling machine
ITUD20120148A1 (en) * 2012-08-30 2014-03-01 Casagrande Spa EXCAVATION EQUIPMENT
FR3023856B1 (en) * 2014-07-18 2016-08-19 Soletanche Freyssinet METHOD OF MANUFACTURING ELEMENT IN SOIL BY IN SITU FLOOR MIXING IN PLACE WITH GEOPOLYMER
US10624252B2 (en) * 2017-02-16 2020-04-21 John D. Nance Rotary harrow disks and devices
NO343970B1 (en) * 2017-07-10 2019-08-05 Jarala As Device for removing sediments from inside piles
CA3071907C (en) * 2017-07-14 2022-03-15 Vermeer Manufacturing Company Hydro excavation vacuum apparatus
US10683634B2 (en) * 2017-09-22 2020-06-16 Coneqtec Corp. Debris diverter for microtrenchers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU208074U1 (en) * 2021-05-27 2021-12-01 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский государственный аграрный университет - МСХА имени К.А. Тимирязева" (ФГБОУ ВО РГАУ - МСХА имени К.А. Тимирязева) The working body of the sewer cleaning machine

Also Published As

Publication number Publication date
EP3543408A1 (en) 2019-09-25
CN112154237A (en) 2020-12-29
KR20200132888A (en) 2020-11-25
WO2019179770A1 (en) 2019-09-26
US11236480B2 (en) 2022-02-01
JP2021518500A (en) 2021-08-02
US20210095435A1 (en) 2021-04-01
CA3092741A1 (en) 2019-09-26

Similar Documents

Publication Publication Date Title
EP3543408B1 (en) Slurry wall mill and method for creating a milled slit in the ground
DE10308538B4 (en) Method of making a trench wall in the ground, trench wall cutter and trench wall cutter
EP3556942B1 (en) Cutter for making a diaphragma wall and method of making such wall
DE2453810A1 (en) METHOD AND DEVICE FOR DISPERSING A POWDER IN A LIQUID
DE3247884A1 (en) METHOD FOR SEEDING SEEDS AND SEEDING MACHINE FOR CARRYING OUT THE METHOD
DE3239756A1 (en) METHOD AND DEVICE FOR CLEANING TUBE TUBES
EP1210987B1 (en) Device for obtaining coarse and fine fractions from a sand mixture
DE1177620B (en) Mixing or conveying element
DE10308540A1 (en) Method and device for producing a foundation element
DE2856298A1 (en) GROUND ROLLER
DE1176581B (en) Method and device for sorting, in particular of mineral material
EP2182115A1 (en) Ballast levelling device
DE102008002038B4 (en) Soil cultivation device and method for treating encrusted soils
DE2212251C3 (en) Device for crushing lump-shaped foreign matter contained in raw gravel
EP0224920A2 (en) Washing plant and method of washing materials in said plant
AT391240B (en) TILLAGE MACHINE WITH PACKER ROLLER
DE4405303C1 (en) Tillage implement
DE4321556C2 (en) Roller with working elements for deep relaxation of soils
AT17873U1 (en) separator
DE902606C (en) Device for mixing fine-grained or powdery substances with liquid, especially for the production of a mixture for the caulking of pit sections
AT399118B (en) DEVICE FOR FILLING PRESS FORMS WITH ONE OR MORE MOLD OPENINGS ON PRESS FORMS OF A PRESS
EP3106279A1 (en) Device and method for processing especially of small sized bulk material
AT43447B (en) Fertilizer spreader.
DE19509549A1 (en) Edge strip installation or renewal method
DE1939650U (en) MIXING DEVICE.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20191218

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20200710

REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 40014862

Country of ref document: HK

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502018002762

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1325991

Country of ref document: AT

Kind code of ref document: T

Effective date: 20201115

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20201021

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210222

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210121

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210122

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210221

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210121

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 502018002762

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

26N No opposition filed

Effective date: 20210722

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20210331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210321

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210321

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20220324

Year of fee payment: 5

Ref country code: DE

Payment date: 20220329

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20210221

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20220322

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20210331

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20220331

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20180321

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 502018002762

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20230321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230321

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230321

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230331

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20231003

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20201021

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20230321