EP3543408A1 - 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
EP3543408A1
EP3543408A1 EP18163075.7A EP18163075A EP3543408A1 EP 3543408 A1 EP3543408 A1 EP 3543408A1 EP 18163075 A EP18163075 A EP 18163075A EP 3543408 A1 EP3543408 A1 EP 3543408A1
Authority
EP
European Patent Office
Prior art keywords
cleaning
milling
trench wall
cutting
wall cutter
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.)
Granted
Application number
EP18163075.7A
Other languages
German (de)
French (fr)
Other versions
EP3543408B1 (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 KR1020207027468A priority patent/KR20200132888A/en
Priority to CA3092741A priority patent/CA3092741A1/en
Priority to PCT/EP2019/055606 priority patent/WO2019179770A1/en
Priority to CN201980020858.5A priority patent/CN112154237A/en
Priority to JP2020550859A priority patent/JP2021518500A/en
Priority to US16/982,015 priority patent/US11236480B2/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 Frässchlitzes in the ground with a cutter frame, at least a pair of cutting wheels, which are rotatably mounted and driven on the Fräsrahmen, each cutting wheel along its outer periphery has a plurality of Fräszähnen, and a feed and / or Discharge device for feeding a milling fluid into or out of the milling slot in the area of the cutting wheels, according to the preamble of claim 1.
  • the invention relates to a method for creating a Frässchlitzes in the ground with such a trench cutter, wherein the cutting wheels are driven in rotation and the trench wall drills sunken into the ground and soil material is milled, the Frässchlitz created in the ground, according to the preamble of claim 13th
  • Such trench wall cutters are used to create so-called slot walls or sealing walls, which are required for securing or sealing excavation pits, for example.
  • a first trimming slot is created, which is filled with a curable material. This mass hardens to a slot wall segment.
  • a trench wall of a desired size can thus be created.
  • From the EP 1 452 645 A1 is a generic trench cutter for creating a slot wall in the ground out. Between the two pairs of cutting wheels opens a feeding device, by means of which a settable liquid can be introduced into the milling slot in the area between the cutting wheels. The supplied settable liquid is thereby by the rotational movement of the cutting wheels with the milled soil material blended into a hardenable mass, which can then harden to the slot wall segment. In this known method, the milled soil material is mixed directly in situ in the milling slot to the curable composition.
  • Another method for producing a trench wall segment in the ground is from the DE 41 41 629 A1 out.
  • a discharge device is provided between the cutting wheels, with which the milled soil material is sucked directly with lawen in the milling slot supporting liquid to the surface.
  • the extracted suspension can be de-enriched in a separator of soil material and returned to an upper portion of the Frässchlitzes.
  • the suspension can be processed in such a way that it represents a hardenable mass which cures to the slot wall segment in the milling slot.
  • the invention has for its object to provide a trench cutter and a method for creating a Frässchlitzes in the ground, with which a Frässchlitz can be made particularly efficient.
  • the trench wall cutter according to the invention is characterized in that spaced apart from the supply and / or discharge device a cleaning device for cleaning the cutting wheels in milling operation with a cleaning fluid is provided and that the cleaning device has a plurality of cleaning nozzles, which are directed to the outer periphery of at least one cutting wheel and are formed for injecting the cleaning fluid for releasing adhering soil material.
  • the basic idea of the invention is to provide a cleaning device spaced apart or separate from the supply and / or discharge device for a milling fluid, by means of which the cutting wheels can be cleaned in the milling operation by means of a cleaning fluid.
  • a cleaning fluid By means of a cleaning fluid, the cutting wheels and in particular the cutting teeth can be cleaned particularly reliably and without significant wear in the milling operation, rotate in which the cutting wheels and work off soil material.
  • the cleaning device has a plurality of cleaning nozzles, which are directed to the outer periphery of at least one cutting wheel and are designed for injecting the cleaning fluid for releasing adhering to the cutting teeth soil material.
  • the cleaning fluid may be a liquid or a gas or a gas-liquid mixture.
  • the cleaning nozzles are spaced from the feeding device for milling fluid, which supplies a relatively large amount of milling fluid in a milling process with in situ mixing in the Frässchlitz for operating the milling machine.
  • the cutting wheels even with longer operating times when milling cohesive soil material on a largely consistently high milling performance, without the milling operation for cleaning the trench wall cutter would have to be interrupted for days.
  • This not only increases the daily milling performance of a mill, but also leads to improved quality of the hardenable Mass in the milling slot, since the Frässchlitz can be preferably processed in a 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 is that two pairs of cutting wheels are provided and that the supply and / or discharge device is arranged in a middle between the two cutting wheels.
  • the cutting wheels of a pair are rotatably mounted about a common axis of rotation.
  • the axis of rotation is preferably arranged horizontally in the milling operation.
  • the axes of rotation of the two pairs are arranged in parallel.
  • the supply and / or discharge device is arranged in the middle between the two cutting wheels, so that the milling fluid can be fed or discharged centrally.
  • the cleaning device with the cleaning nozzles for the individual cutting wheels are arranged in each case spaced from the center laterally to the respective cutting wheels.
  • fixed cleaning nozzles can be provided.
  • the cleaning nozzles are mounted adjustable. It can be provided, for example, ball nozzles, which can be tightened by means of a corresponding nut in a set position.
  • the cleaning device comprises nozzle rails, wherein in each case a nozzle rail along the outer circumference of each cutting wheel is arranged and runs approximately parallel to the axis of rotation of the cutting wheel.
  • a nozzle rail may 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.
  • Such a trench wall cutter is preferably further developed in that rod-shaped cleaning rails are attached to the nozzle rail, that the cutting teeth on a cutting wheel are arranged in annular Fräszahn-2n, which are axially spaced apart to form annular Eisenraumen, and that the rod-shaped cleaning nozzles protrude into the annular spaces.
  • rod-shaped cleaning rails are attached to the nozzle rail, that the cutting teeth on a cutting wheel are arranged in annular Fräs leopard myselfn, which are axially spaced apart to form annular Eisenraumen, and that the rod-shaped cleaning nozzles protrude into the annular spaces.
  • the rod-shaped cleaning nozzles may have a nozzle opening or a plurality of nozzle openings, so that targeted nozzles can be directed to the cutting teeth in the Fräs leopard #2n or the outer periphery of the cutting wheels.
  • adjustable nozzles can be provided at the cleaning openings.
  • a cleaning of the cutting wheels in the milling operation can be achieved solely by the cleaning device with the cleaning fluid.
  • a particularly good cleaning is achieved according to a development of the invention in that the milling frame juxtaposrplatten are arranged to strip adhering soil from the cutting wheels.
  • Scraper plates are basically known from the prior art. These are mechanical stripping devices, which preferably extend into the annular spaces between the annular Fräs leopard myselfn to strip there located soil material from the interstices. However, the mechanical clearing plates are to be arranged at a certain distance from the Fräs leopard myselfn to avoid in milling milling collisions, which could occur due to vibrations of the individual machine parts in operation. In addition to this mechanical cleaning remaining residual soil material can be removed by the cleaning fluid with the cleaning device according to the invention.
  • the cleaning nozzles are integrated into the reamer plates or mounted close to them.
  • the reamer plates themselves may be formed as hollow plates, wherein the cavity serves as a supply of cleaning fluid to the cleaning nozzles on the reamer plates.
  • the rod-shaped cleaning nozzles on a Be mounted outside the redesignrplatten to remove remaining residual soil material from the Fräszähnen.
  • a particularly good cleaning is achieved according to an embodiment of the invention in that the nozzle rails are connected via leads with at least one injection pump, with which the cleaning fluid can be injected under pressure.
  • the injection pump can be arranged over days or on the cutting 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 adjusted.
  • a sufficient injection pressure and a sufficient injection quantity of cleaning fluid can be set in order to reliably clean the cutting teeth from soil material.
  • a desired pressure can also be set via the control device in the area of the cutting wheels, which can have a positive effect on the milling and the mixing of milled ground material with milling fluid.
  • the cleaning fluid corresponds to the milling fluid.
  • the cleaning fluid may be a curable suspension, in particular a cement suspension, which is used for detaching soil material.
  • the cleaning fluid injected under pressure can simultaneously assist a mixing of the milled ground material, so that, in particular in the case of an in situ process, a particularly good hardenable suspension is established for forming the slot wall element.
  • cleaning fluid and water can be provided to clean about the end of an operating day, the cutting wheels through the cleaning device outside the Frässchlitzes.
  • a further preferred embodiment of the invention consists in that the feed device has a feed pump for feeding the milling fluid, wherein the milling fluid and the cleaning fluid are mixed with the cutting wheels in the milling slot with milled ground material to form a curable suspension.
  • a trench cutter for an in situ milling and mixing process is preferably as Cleaning fluid used the milling fluid.
  • the feed pump on the milling frame can guide both the milling fluid to the feeder and the cleaning fluid to the cleaning nozzles. As a result, a particularly efficient construction of the trench wall cutter can be achieved.
  • the discharge device has a suction pump, with which milling liquid is sucked out of the Frässchlitz with the cleaning fluid and milled soil material.
  • a rope or a rod is attached, with which the trench wall cutter is suspended on a carrier device and vertically adjustable.
  • a cleaning of the cutting wheels in the milling operation can be done both during the milling of the soil material as well as during a lifting movement by means of the rope or the rod.
  • the inventive method for milling a Frässchlitzes in the ground with the aforementioned trench wall cutter is characterized in that during milling via a cleaning device, a cleaning fluid is sprayed onto the outer periphery of the cutting wheels, wherein adhering to the cutting wheels soil material is released.
  • a trench wall cutter 10 according to the invention with a milling frame 12 is in the FIGS. 1 to 4 shown in the different views.
  • a pair of second cutting wheels 15 are mounted rotatably about a common axis of rotation and on a second gear plate 11 b a pair of second cutting wheels 15 rotatably together about a different axis of rotation on a first gear plate 11a.
  • the cutting wheels 14, 15 each have a drum-shaped hub 17, on the outer periphery of a plurality of cutting teeth 20 are mounted with Fräs leopardhaltern 18.
  • the cutting teeth 20 are detachably mounted in the Fräszahnhaltern 18.
  • the Fräs leopardhalter 18 with the cutting teeth 20 are arranged along the outer periphery of each cutting wheels 14, 15 in annular Fräszahn #2n 22, as clearly from the FIGS. 3 and 4 evident.
  • the individual Fräszahn réellen 22 are axially spaced apart, so that between these annular spaces 24 are formed.
  • ground materials can be attached to the cutting teeth 20, the Fräszahnhaltern 18 and in the spaces 24 between the cutting teeth 20 and the Fräszahnhaltern, especially when milling cohesive soil, such as clay.
  • plate-shaped Implementrplatten 50 are attached to the underside of the cutter frame, which comb-like engage in the annular spaces 24 between the cutting teeth 20 to mechanically strip adhering soil material.
  • the neurosciencerplatten 50 are mounted on both sides of a central discharge device 30, which is designed for the extraction of milling fluid from the created Frässchlitz.
  • the discharge device 30 has a suction box 32 extending parallel to the axes of rotation and tapering towards the bottom. On its underside, the suction box 32 is provided with a plurality of suction openings 34, as can be seen Fig. 3 can be seen.
  • Trench wall cutter 10 shown is designed for carrying out a milling process, in which the removed soil material together with surrounding support or milling liquid from the working area of the cutting wheels 14, 15 is sucked off and transported to the surface over days.
  • a corresponding feed device 30 may be provided, through which milling fluid is fed into the region between the cutting wheels 14, 15.
  • Such a trench wall cutter 10 would be designed for carrying out a milling process, in which the abraded soil material is mixed together with the milling liquid to a suspension in situ in the milling slot, which preferably hardens after removal of the trench wall cutter 10 from the Frässchlitz and so to a slot wall segment or Schlitzwandpaneel for a Crevice wall hardens.
  • a cleaning device 40 with cleaning nozzles 46 which are directed onto the outer circumference of the cutting 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 clip-like holding frame 41, of which a holding frame 41 in 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 cutting wheels 14, 15.
  • the two nozzle rails 42 of two opposite cutting wheels 14, 15 are connected via a feed line 44 only partially shown with a supply pump, not shown. Via the feed pump, a cleaning fluid, in particular a liquid, can be supplied under pressure via the supply lines 44 to the nozzle rails 42.
  • adjustable rod-shaped cleaning nozzles 46 are mounted on clamping nuts. By means of the clamping nuts 48, the cleaning nozzles 46 can be released and at least partially changed in their orientation and thus adjusted to the respective arrangement of cutting teeth 20 on the cutting 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 cutting teeth 20 and the milling tooth holders 18 in the milling operation.
  • the cleaning nozzles 46 engage in a comb-like manner in the annular spaces 24.
  • the feed pump for injecting the cleaning fluid into the cleaning nozzles 46 may preferably be arranged on the milling frame 12 of the trench wall cutter 10.
  • the cleaning fluid used may be the milling fluid which is located in the milling slot.
  • the above-described method for creating a trimming slot in the ground can be carried out, wherein in milling operation with rotating cutting wheels 14, 15 adhering soil material from the cutting wheels 14, 15 can be solved by the cleaning device 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Road Repair (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

Die Erfindung betrifft eine Schlitzwandfräse und ein Verfahren zum Erstellen eines Frässchlitzes im Boden mit einem Fräsrahmen, mindestens einem Paar von Fräsrädern, welche drehbar an einem unteren Ende des Fräsrahmens gelagert und angetrieben werden, wobei jedes Fräsrad entlang seines Außenumfangs eine Vielzahl von Fräszähnen aufweist, und einer Zuführ- und/oder Abführeinrichtung zum Zuführen beziehungsweise Abführen einer Fräsflüssigkeit in den beziehungsweise aus dem Frässchlitz im Bereich der Fräsräder. Erfindungsgemäß 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.The invention relates to a trench cutter and a method for creating a Frässchlitzes in the ground with a cutter frame, at least a pair of cutting wheels, which are rotatably mounted and driven at a lower end of the Fräsrahmens, each cutting wheel along its outer periphery has a plurality of Fräszähnen, and a supply and / or discharge device for feeding or discharging a milling fluid into or out of the milling slot in the area of the cutting wheels. According to the invention, a cleaning device for cleaning the cutting wheels in milling operation with a cleaning fluid is provided at a distance from the supply and / or discharge device and that the cleaning device has a plurality of cleaning nozzles which are directed onto the outer circumference of at least one cutting wheel and for injecting the Cleaning fluids are formed for dissolving adhering soil material.

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 Frässchlitzes in the ground with a cutter frame, at least a pair of cutting wheels, which are rotatably mounted and driven on the Fräsrahmen, each cutting wheel along its outer periphery has a plurality of Fräszähnen, and a feed and / or Discharge device for feeding a milling fluid into or out of the milling slot in the area of the cutting 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 13.Furthermore, the invention relates to a method for creating a Frässchlitzes in the ground with such a trench cutter, wherein the cutting wheels are driven in rotation and the trench wall drills sunken into the ground and soil material is milled, the Frässchlitz created in the ground, according to the preamble of claim 13th

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 slot walls or sealing walls, which are required for securing or sealing excavation pits, for example. By means of a trench cutter, a first trimming slot is created, which is filled with a curable material. This mass hardens to a slot wall segment. By juxtaposing a plurality of trench wall segments, a trench wall of a desired size can thus be created.

Aus der EP 1 452 645 A1 geht eine gattungsgemäße 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 is a generic trench cutter for creating a slot wall in the ground out. Between the two pairs of cutting wheels opens a feeding device, by means of which a settable liquid can be introduced into the milling slot in the area between the cutting wheels. The supplied settable liquid is thereby by the rotational movement of the cutting wheels with the milled soil material blended into a hardenable mass, which can then harden to the slot wall segment. In this known method, the milled soil material is mixed directly in situ in the milling slot to the curable composition.

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 trench wall segment in the ground is from the DE 41 41 629 A1 out. 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 directly with befindenen in the milling slot supporting liquid to the surface. The extracted suspension can be de-enriched in a separator of soil material and returned to an upper portion of the Frässchlitzes. The suspension can be processed in such a way that it represents a hardenable mass which cures to the slot wall segment in the milling slot.

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 Frässchlitzes means of a trench cutter, there is basically the problem that when milling in cohesive soils, ie, for example, in clay, silt, claystone, etc., the ground removed by the cutting wheels adheres to the cutting teeth of the cutting wheels and can glue the cutting wheels so. This can lead to the bonding being so strong that the trench wall cutter has to be pulled out of the trimming slot in order to mechanically clean the cutting wheels. Since cutting slots can reach a depth of 40 meters or more, this represents a great expenditure of time and thus an economic disadvantage. The daily milling performance of a trench wall cutter can thereby be markedly reduced.

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 releasing adhering soil material between annular rows of cutting teeth on a cutting wheel, it is approximately from the EP 2 685 007 A1 known to attach so-called Räumerplatten the Fräsradrahmen, which protrude into the spaces between the annular rows of Fräszähnen. However, the Räumerplatten must maintain a certain distance from the cutting wheels and the Fräszähnen, so that only a partial removal of adhering soil material can be achieved.

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 has for its object to provide a trench cutter and a method for creating a Frässchlitzes in the ground, with which a Frässchlitz can be made particularly efficient.

Die Aufgabe wird nach der Erfindung durch eine Schlitzwandfräse mit den Merkmalen des Anspruchs 1 und durch ein Verfahren mit den Merkmalen des Anspruchs 14 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a trench cutter with the features of claim 1 and by a method having the features of claim 14. Preferred embodiments of the invention are indicated in the dependent claims.

Die erfindungsgemäße Schlitzwandfräse ist dadurch gekennzeichnet, 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.The trench wall cutter according to the invention is characterized in that spaced apart from the supply and / or discharge device a cleaning device for cleaning the cutting wheels in milling operation with a cleaning fluid is provided and that the cleaning device has a plurality of cleaning nozzles, which are directed to the outer periphery of at least one cutting wheel and are formed for injecting the cleaning fluid for releasing adhering soil material.

Grundidee 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.The basic idea of the invention is to provide a cleaning device spaced apart or separate from the supply and / or discharge device for a milling fluid, by means of which the cutting wheels can be cleaned in the milling operation by means of a cleaning fluid. By means of a cleaning fluid, the cutting wheels and in particular the cutting teeth can be cleaned particularly reliably and without significant wear in the milling operation, rotate in which the cutting wheels and work 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 an aspect of the invention that the cleaning device has a plurality of cleaning nozzles, which are directed to the outer periphery of at least one cutting wheel and are designed for injecting the cleaning fluid for releasing adhering to the cutting teeth soil material. The cleaning fluid may be a liquid or a gas or a gas-liquid mixture. The cleaning nozzles are spaced from the feeding device for milling fluid, which supplies a relatively large amount of milling fluid in a milling process with in situ mixing in the Frässchlitz for operating the milling machine. By arranging a plurality of cleaning nozzles, which are specifically aligned with the cutting wheels and in particular the cutting teeth and tooth holder, a targeted release of adhering soil material can be achieved. As a result, the cutting wheels, even with longer operating times when milling cohesive soil material on a largely consistently high milling performance, without the milling operation for cleaning the trench wall cutter would have to be interrupted for days. This not only increases the daily milling performance of a mill, but also leads to improved quality of the hardenable Mass in the milling slot, since the Frässchlitz can be preferably processed in a 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 is that two pairs of cutting wheels are provided and that the supply and / or discharge device is arranged in a middle between the two cutting wheels. The cutting wheels of a pair are rotatably mounted about a common axis of rotation. The axis of rotation is preferably arranged horizontally in the milling operation. The axes of rotation of the two pairs are arranged in parallel. The supply and / or discharge device is arranged in the middle between the two cutting wheels, so that the milling fluid can be fed or discharged centrally. The cleaning device with the cleaning nozzles for the individual cutting wheels are arranged in each case spaced from the center laterally to the respective cutting 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 modified floors and tooth arrangements, it is preferred according to a development of the invention that the cleaning nozzles are mounted adjustable. It can be provided, for example, ball nozzles, which can be tightened by means of a corresponding nut in a set position.

Gemäß einer weiteren Ausbildung der Erfindung ist es vorteilhaft, dass die Reinigungsvorrichtung Düsenschienen aufweist, wobei jeweils eine Düsenschiene entlang des Au-ßenumfangs 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 comprises nozzle rails, wherein in each case a nozzle rail along the outer circumference of each cutting wheel is arranged and runs approximately parallel to the axis of rotation of the cutting wheel. In principle, several nozzle rails can be provided per cutting wheel. A nozzle rail may 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. By means of corresponding adjustment valves on the individual cleaning nozzles or the nozzle rails, it is also possible to provide and set different injection quantities and injection pressures at 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 further developed in that rod-shaped cleaning rails are attached to the nozzle rail, that the cutting teeth on a cutting wheel are arranged in annular Fräszahnreihen, which are axially spaced apart to form annular Zwischenraumen, and that the rod-shaped cleaning nozzles protrude into the annular spaces. In particular, when milling cohesive soils cutting wheels are used, in which the cutting teeth are arranged in axially offset from each other annular Fräszahnreihen on the outer circumference of a cutting wheel. Between the annular Fräszahnreihen annular spaces are formed, in which protrude the rod-shaped cleaning nozzles. The rod-shaped cleaning nozzles extend from the respective nozzle rail in the direction of the cutting wheel center. The rod-shaped cleaning nozzles may have a nozzle opening or a plurality of nozzle openings, so that targeted nozzles can be directed to the cutting teeth in the Fräszahnreihen or the outer periphery of the cutting wheels. At the cleaning openings adjustable nozzles can be provided.

Grundsätzlich kann eine Reinigung der Fräsräder im Fräsbetrieb allein durch die Reinigungsvorrichtung mit dem Reinigungsfluid erreicht werden. Eine besonders gute Reinigung wird nach einer Weiterbildung 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.In principle, a cleaning of the cutting wheels in the milling operation can be achieved solely by the cleaning device with the cleaning fluid. A particularly good cleaning is achieved according to a development of the invention in that the milling frame Räumerplatten are arranged to strip adhering soil from the cutting wheels. Scraper plates are basically known from the prior art. These are mechanical stripping devices, which preferably extend into the annular spaces between the annular Fräszahnreihen to strip there located soil material from the interstices. However, the mechanical clearing plates are to be arranged at a certain distance from the Fräszahnreihen to avoid in milling milling collisions, which could occur due to vibrations of the individual machine parts in operation. In addition to this mechanical cleaning remaining residual soil material can be removed by the cleaning fluid with the cleaning device according to the invention.

Dabei ist es nach einer Weiterbildung der Erfindung besonders vorteilhaft, 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 einer Außenseite der Räumerplatten angebracht sein, um verbliebenes restliches Bodenmaterial von den Fräszähnen zu entfernen.It is particularly advantageous according to a development of the invention that the cleaning nozzles are integrated into the reamer plates or mounted close to them. Thus, the reamer plates themselves may be formed as hollow plates, wherein the cavity serves as a supply of cleaning fluid to the cleaning nozzles on the reamer plates. Alternatively, in particular the rod-shaped cleaning nozzles on a Be mounted outside the Räumerplatten to remove remaining residual soil material from the Fräszähnen.

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.A particularly good cleaning is achieved according to an embodiment of the invention in that the nozzle rails are connected via leads with at least one injection pump, with which the cleaning fluid can be injected under pressure. The injection pump can be arranged over days or on the cutting 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.In this case, according to an embodiment variant 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 adjusted. In this case, depending on the adhesion property of the soil material to be scoured, a sufficient injection pressure and a sufficient injection quantity of cleaning fluid can be set in order to reliably clean the cutting teeth from soil material. At the same time, a desired pressure can also be set via the control device in the area of the cutting wheels, which can have a positive effect on the milling and the mixing of milled ground 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 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 may be a curable suspension, in particular a cement suspension, which is used for detaching soil material. At the same time, the cleaning fluid injected under pressure can simultaneously assist a mixing of the milled ground material, so that, in particular in the case of an in situ process, a particularly good hardenable suspension is established for forming the slot wall element. As cleaning fluid and water can be provided to clean about the end of an operating day, the cutting wheels through the cleaning device outside the Frässchlitzes.

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.A further preferred embodiment of the invention consists in that the feed device has a feed pump for feeding the milling fluid, wherein the milling fluid and the cleaning fluid are mixed with the cutting wheels in the milling slot with milled ground material to form a curable suspension. In such a trench cutter for an in situ milling and mixing process is preferably as Cleaning fluid used the milling fluid. The feed pump on the milling frame can guide both the milling fluid to the feeder and the cleaning fluid to the cleaning nozzles. As a result, a particularly efficient construction of the trench wall cutter can be achieved.

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 it can be provided according to a development of the invention that the discharge device has a suction pump, with which milling liquid is sucked out of the Frässchlitz with the cleaning fluid and milled soil material. In this milling method, a so-called suction box at the lower end of the trench wall cutter by means of the suction pump and the discharge device, which has one or more suction, sucked out of the milling slot milling liquid below the cutter frame.

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 at a top end of the trimming frame, a rope or a rod is attached, with which the trench wall cutter is suspended on a carrier device and vertically adjustable. A cleaning of the cutting wheels in the milling operation can be done both during the milling of the soil material as well as 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 inventive method for milling a Frässchlitzes in the ground with the aforementioned trench wall cutter is characterized in that during milling via a cleaning device, a cleaning fluid is sprayed onto the outer periphery of the cutting wheels, wherein adhering to the cutting wheels soil material is released. 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 will be described in more detail below with reference to a preferred embodiment, which is shown schematically in the figures. In the figures show:
Fig. 1
a perspective view of a lower part of a trench 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 the FIGS. 1 and 2 ;
Fig. 4
a view of the trench wall cutter from the FIGS. 1 to 3 from underneath; and
Fig. 5
a perspective view of a part of the cleaning device for the cutting 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 FIGS. 1 to 4 shown in the different views. At a lower end of the milling frame 12, which is only partially shown, a pair of second cutting wheels 15 are mounted rotatably about a common axis of rotation and on a second gear plate 11 b a pair of second cutting wheels 15 rotatably together about a different axis of rotation on a first gear plate 11a. The cutting wheels 14, 15 each have a drum-shaped hub 17, on the outer periphery of a plurality of cutting teeth 20 are mounted with Fräszahnhaltern 18. The cutting teeth 20 are detachably mounted in the Fräszahnhaltern 18. The Fräszahnhalter 18 with the cutting teeth 20 are arranged along the outer periphery of each cutting wheels 14, 15 in annular Fräszahnreihen 22, as clearly from the FIGS. 3 and 4 evident. The individual Fräszahnreihen 22 are axially spaced apart, so that between these annular spaces 24 are formed.

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 milling operation, 18 ground materials can be attached to the cutting teeth 20, the Fräszahnhaltern 18 and in the spaces 24 between the cutting teeth 20 and the Fräszahnhaltern, especially when milling cohesive soil, such as clay. To remove adhering soil material 12 plate-shaped Räumerplatten 50 are attached to the underside of the cutter frame, which comb-like engage in the annular spaces 24 between the cutting teeth 20 to mechanically strip adhering soil material. The Räumerplatten 50 are mounted on both sides of a central discharge device 30, which is designed for the extraction of milling fluid from the created Frässchlitz. In this case, the discharge device 30 has a suction box 32 extending parallel to the axes of rotation and tapering towards the bottom. On its underside, the suction box 32 is provided with a plurality of suction openings 34, as can be seen Fig. 3 can be seen.

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 in the FIGS. 1 to 4 Trench wall cutter 10 shown is designed for carrying out a milling process, in which the removed soil material together with surrounding support or milling liquid from the working area of the cutting wheels 14, 15 is sucked off and transported to the surface over days. Alternatively, instead of the discharge device 30, a corresponding feed device 30 may be provided, through which milling fluid is fed into the region between the cutting wheels 14, 15. Such a trench wall cutter 10 would be designed for carrying out a milling process, in which the abraded soil material is mixed together with the milling liquid to a suspension in situ in the milling slot, which preferably hardens after removal of the trench wall cutter 10 from the Frässchlitz and so to a slot wall segment or Schlitzwandpaneel for a Crevice 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 onto the outer circumference of the cutting 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 clip-like holding frame 41, of which a holding frame 41 in Fig. 5 is shown. At the lower end of the U-shaped holding frame 41 in each case 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 cutting wheels 14, 15. The two nozzle rails 42 of two opposite cutting wheels 14, 15 are connected via a feed line 44 only partially shown with a supply pump, not shown. Via the feed pump, a cleaning fluid, in particular a liquid, can be supplied under pressure 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 48 adjustable rod-shaped cleaning nozzles 46 are mounted on clamping nuts. By means of the clamping nuts 48, the cleaning nozzles 46 can be released and at least partially changed in their orientation and thus adjusted to the respective arrangement of cutting teeth 20 on the cutting 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 cutting teeth 20 and the milling tooth holders 18 in the milling operation. The cleaning nozzles 46 engage in a comb-like manner in the annular spaces 24.

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 may preferably be arranged on the milling frame 12 of the trench wall cutter 10. Preferably, the cleaning fluid used may be the milling fluid which is located in the milling slot.

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 trench wall cutter 10 according to the invention described above, the above-described method for creating a trimming slot in the ground can be carried out, wherein in milling operation with rotating cutting wheels 14, 15 adhering soil material from the cutting wheels 14, 15 can be solved by the cleaning device 40.

Claims (14)

Schlitzwandfräse zum Erstellen eines Frässchlitzes im Boden mit - einem Fräsrahmen (12), - mindestens einem Paar von Fräsrädern (14, 15), welche drehbar an einem unteren Ende des Fräsrahmens (12) gelagert und angetrieben werden, wobei jedes Fräsrad (14, 15) entlang seines Außenumfangs eine Vielzahl von Fräszähnen (20) aufweist, und - einer Zuführ- und/oder Abführeinrichtung (30) zum Zuführen beziehungsweise Abführen einer Fräsflüssigkeit in beziehungsweise aus dem Frässchlitz im Bereich der Fräsräder (14, 15), dadurch gekennzeichnet, - dass beabstandet von der Zuführ- und/oder Abführeinrichtung (30) eine Reinigungsvorrichtung (40) zum Reinigen der Fräsräder (14, 15) im Fräsbetrieb mit einem Reinigungsfluid vorgesehen ist und - dass die Reinigungsvorrichtung (40) eine Vielzahl von Reinigungsdüsen (46) aufweist, welche auf den Außenumfang zumindest eines Fräsrades (14, 15) gerichtet sind und zum Einspritzen des Reinigungsfluides zum Lösen von anhaftendem Bodenmaterial ausgebildet sind. Trench wall cutter for creating a trench slot in the ground with a milling frame (12), - At least one pair of cutting wheels (14, 15) which are rotatably supported and driven at a lower end of the Fräsrahmens (12), each cutting wheel (14, 15) along its outer periphery a plurality of Fräszähnen (20), and a supply and / or discharge device (30) for feeding or discharging a milling fluid into or out of the milling slot in the area of the cutting wheels (14, 15), characterized, - That at a distance from the supply and / or discharge device (30) is provided a cleaning device (40) for cleaning the cutting wheels (14, 15) in the milling operation with a cleaning fluid and - That the cleaning device (40) has a plurality of cleaning nozzles (46) which are directed to the outer periphery of at least one cutting wheel (14, 15) and are designed for injecting the cleaning fluid for releasing adhering soil material. Schlitzwandfräse nach Anspruch 1,
dadurch gekennzeichnet,
dass zwei Paare von Fräsrädern (14, 15) vorgesehen sind und
dass die Zuführ- und/oder Abführeinrichtung (30) in einer Mitte zwischen den beiden Fräsrädern (14, 15) angeordnet ist.Trench wall cutter according to claim 1,
characterized,
that two pairs of cutting wheels (14, 15) are provided and
in that the supply and / or discharge device (30) is arranged in a middle between the two cutting wheels (14, 15). Schlitzwandfräse nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass die Reinigungsdüsen (46) verstellbar gelagert sind.Trench wall cutter according to claim 1 or 2,
characterized,
that the cleaning nozzles (46) are adjustably mounted. Schlitzwandfräse nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass die Reinigungsvorrichtung (40) Düsenschienen (42) aufweist, wobei jeweils eine Düsenschiene (42) entlang des Außenumfangs von jedem Fräsrad (14, 15) angeordnet ist und etwa parallel zur Drehachse des Fräsrades (14, 15) verläuft.Trench wall cutter according to one of claims 1 to 3,
characterized,
in that the cleaning device (40) has nozzle rails (42), wherein in each case a nozzle rail (42) is arranged along the outer circumference of each cutting wheel (14, 15) and extends approximately parallel to the axis of rotation of the cutting wheel (14, 15). Schlitzwandfräse nach Anspruch 4,
dadurch gekennzeichnet,
dass an der Düsenschiene (42) stabförmige Reinigungsdüsen (42) angebracht sind,
dass die Fräszähne (20) an einem Fräsrad (14, 15) in ringförmigen Fräszahnreihen (22) angeordnet sind, welche unter Ausbildung von ringförmigen Zwischenräumen (24) zueinander axial beabstandet sind, und
dass die stabförmigen Reinigungsdüsen (46) in die ringförmigen Zwischenräume (24) hineinragen.Trench wall cutter according to claim 4,
characterized,
that rod-shaped cleaning nozzles (42) are attached to the nozzle rail (42),
that the cutting teeth (20) on a cutting wheel (14, 15) in annular Fräszahnreihen (22) are arranged, which are axially spaced apart to form annular spaces (24), and
in that the rod-shaped cleaning nozzles (46) protrude into the annular intermediate spaces (24). Schlitzwandfräse nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass am Fräsrahmen (12) Räumerplatten (50) zum Abstreifen von anhaftendem Bodenmaterial von den Fräsrädern (14, 15) angeordnet sind.Trench wall cutter according to one of claims 1 to 5,
characterized,
that on the cutting frame (12) Räumerplatten (50) for stripping adhering soil material from the cutting wheels (14, 15) are arranged. Schlitzwandfräse nach Anspruch 6,
dadurch gekennzeichnet,
dass die Reinigungsdüsen (46) in die Räumerplatten (50) integriert oder nahe zu diesen angebracht sind.Trench wall cutter according to claim 6,
characterized,
are that the cleaning nozzles (46) integrated into the Räumerplatten (50) or mounted near to them. Schlitzwandfräse nach einem der Ansprüche 4 bis 7,
dadurch gekennzeichnet,
dass die Düsenschienen (42) über Zuleitungen (44) mit mindestens einer Einspritzpumpe verbunden sind, mit welcher das Reinigungsfluid unter Druck einspritzbar ist.Trench wall cutter according to one of claims 4 to 7,
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. Schlitzwandfräse nach Anspruch 8,
dadurch gekennzeichnet,
dass eine Steuereinrichtung vorgesehen ist, mit welcher der Einspritzdruck und/oder eine Einspritzmenge des Reinigungsfluides einstellbar ist.Trench wall cutter according to claim 8,
characterized,
that a control device is provided with which the injection pressure and / or an injection amount of the cleaning fluid is adjustable. Schlitzwandfräse nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
dass das Reinigungsfluid der Fräsflüssigkeit entspricht.Trench wall cutter according to one of claims 1 to 9,
characterized,
that the cleaning fluid which corresponds Fräsflüssigkeit. Schlitzwandfräse nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
dass die Zuführeinrichtung (30) eine Zuführpumpe zum Zuführen der Fräsflüssigkeit aufweist, wobei die Fräsflüssigkeit und das Reinigungsfluid mit den Fräsrädern (14, 15) im Frässchlitz mit abgefrästem Bodenmaterial zu einer aushärtbaren Suspension vermischt werden.Trench wall cutter according to one of claims 1 to 10,
characterized,
that the feed device (30) comprises a supply pump for supplying the Fräsflüssigkeit, wherein the Fräsflüssigkeit and the cleaning fluid with the cutting wheels (14, 15) in the cut trench are mixed with abgefrästem soil material to a hardenable suspension. Schlitzwandfräse nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet,
dass die Abführeinrichtung (30) eine Absaugpumpe aufweist, mit welcher Fräsflüssigkeit mit dem Reinigungsfluid und abgefrästem Bodenmaterial aus dem Frässchlitz abgesaugt wird.Trench wall cutter according to one of claims 1 to 10,
characterized,
in that the discharge device (30) has a suction pump with which milling fluid is sucked out of the milling slot with the cleaning fluid and milled ground material. Schlitzwandfräse nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet,
dass an einem oberen Ende des Fräsrahmens (12) ein Seil oder eine Stange angebracht ist, mit welcher die Schlitzwandfräse (10) an einem Trägergerät aufgehängt und vertikal verstellbar ist.Trench wall cutter according to one of claims 1 to 12,
characterized,
in that a cable or a bar with which the trench wall cutter (10) is suspended from a carrier device and vertically adjustable is mounted on an upper end of the trimming frame (12). Verfahren zum Fräsen eines Frässchlitzes im Boden mit einer Schlitzwandfräse nach einem der Ansprüche 1 bis 13,
wobei die Fräsräder (14, 15) drehend angetrieben werden und die Schlitzwandfräse (10) in den Boden abgeteuft und Bodenmaterial abgefräst wird, wobei der Frässchlitz im Boden erstellt wird,
dadurch gekennzeichnet,
dass beim Fräsen über eine Reinigungsvorrichtung (40) ein Reinigungsfluid auf den Außenumfang der Fräsräder (14, 15) gespritzt wird, wobei an den Fräsrädern (14, 15) anhaftendes Bodenmaterial gelöst wird.A method of milling a mill slot in the ground with a trench cutter according to any one of claims 1 to 13,
wherein the cutting wheels (14, 15) are driven in rotation and the trench wall cutter (10) is sunk into the ground and ground material is milled, whereby the trimming slot is created in the ground,
characterized,
in that a cleaning fluid is sprayed onto the outer circumference of the cutting wheels (14, 15) during milling via a cleaning device (40), soil material adhering to the cutting wheels (14, 15) being released.
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
CA3092741A CA3092741A1 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a cut trench in the soil
PCT/EP2019/055606 WO2019179770A1 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a trench in the ground
CN201980020858.5A CN112154237A (en) 2018-03-21 2019-03-06 Trench wall cutter and method for producing a cutting trench in 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
US16/982,015 US11236480B2 (en) 2018-03-21 2019-03-06 Trench cutter and method for producing a cut trench in the 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 true EP3543408A1 (en) 2019-09-25
EP3543408B1 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 (3)

* 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
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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300446A1 (en) * 1972-01-14 1973-07-26 Saipem Spa METHOD AND DEVICE FOR DIGGING A TRENCH UNDER A SUBWATER PIPELINE
DE4141629A1 (en) 1991-12-17 1993-06-24 Bauer Spezialtiefbau Method of constructing subterraneous curtain wall - uses self-hardening circulating suspension, enriched with fine ground materials, to form homogeneous wall material
EP1452645A1 (en) 2003-02-27 2004-09-01 BAUER Maschinen GmbH Method for building a diaphragm wall in the ground and trench wall cutting apparatus
EP2685007A1 (en) 2012-07-10 2014-01-15 BAUER Maschinen GmbH Roue de fraisage pour une fraise pour paroi moulée
EP2703565A1 (en) * 2012-08-30 2014-03-05 CASAGRANDE SpA Excavation apparatus

Family Cites Families (40)

* 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
US3960407A (en) * 1972-10-03 1976-06-01 Atlas Copco Aktiebolag Cutters and methods of cutting
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
DE2810606C2 (en) * 1978-03-11 1987-02-05 Salzgitter Maschinen Und Anlagen Ag, 3320 Salzgitter Chisel for a breaking tool that works by striking the rock
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
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
AU6828794A (en) * 1993-05-03 1994-11-21 Bruce L. Bruso 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.
US6409276B1 (en) * 1999-04-02 2002-06-25 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
DE502004005279D1 (en) * 2004-08-23 2007-11-29 Bauer Maschinen Gmbh Apparatus and method for creating a diaphragm wall in the ground
PL1630298T3 (en) * 2004-08-23 2008-05-30 Bauer Maschinen Gmbh Method of making a slotted wall by means of a trench cutter
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
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
AU2018100994A4 (en) * 2017-07-14 2018-08-16 Vermeer Manufacturing Company Hydro excavation vacuum apparatus and fluid storage and supply systems thereof
US10683634B2 (en) * 2017-09-22 2020-06-16 Coneqtec Corp. Debris diverter for microtrenchers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2300446A1 (en) * 1972-01-14 1973-07-26 Saipem Spa METHOD AND DEVICE FOR DIGGING A TRENCH UNDER A SUBWATER PIPELINE
DE4141629A1 (en) 1991-12-17 1993-06-24 Bauer Spezialtiefbau Method of constructing subterraneous curtain wall - uses self-hardening circulating suspension, enriched with fine ground materials, to form homogeneous wall material
EP1452645A1 (en) 2003-02-27 2004-09-01 BAUER Maschinen GmbH Method for building a diaphragm wall in the ground and trench wall cutting apparatus
EP2685007A1 (en) 2012-07-10 2014-01-15 BAUER Maschinen GmbH Roue de fraisage pour une fraise pour paroi moulée
EP2703565A1 (en) * 2012-08-30 2014-03-05 CASAGRANDE SpA Excavation apparatus

Cited By (4)

* 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
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
WO2023165796A1 (en) * 2022-03-01 2023-09-07 Bauer Maschinen Gmbh Diaphragm wall cutter and method for producing a trench in the ground

Also Published As

Publication number Publication date
KR20200132888A (en) 2020-11-25
JP2021518500A (en) 2021-08-02
CN112154237A (en) 2020-12-29
US11236480B2 (en) 2022-02-01
EP3543408B1 (en) 2020-10-21
US20210095435A1 (en) 2021-04-01
WO2019179770A1 (en) 2019-09-26
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
DE10308538C5 (en) Method of making a trench wall in the ground, trench wall cutter and trench wall cutter
EP3296468B1 (en) Method and trench cutter for creating a slit in the ground
EP3556942B1 (en) Cutter for making a diaphragma wall and method of making such wall
EP2578749A2 (en) Rotor housing for a milling device for soil treatment, milling device and method for cleaning a rotor housing
DE613770C (en) Method and device for opening up bale-shaped pulp or tabular wood pulp
DE4105934A1 (en) DEVICE FOR IMPLEMENTING COMPOST STORED IN RENT
DE2810386B1 (en) Device for driving ditches
DE3239756A1 (en) METHOD AND DEVICE FOR CLEANING TUBE TUBES
DE1177620B (en) Mixing or conveying element
DE10308540A1 (en) Method and device for producing a foundation element
EP2182115A1 (en) Ballast levelling device
DE9017356U1 (en) Pan mill, especially for continuous dry or wet processing of mineral material
DE2212251C3 (en) Device for crushing lump-shaped foreign matter contained in raw gravel
EP0743265A2 (en) Storage container for bulk material
EP2666911B1 (en) Method for producing a floor mortar wall in the floor
DE4405303C1 (en) Tillage implement
DE4321556C2 (en) Roller with working elements for deep relaxation of soils
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
DE3208492A1 (en) Method and apparatus for placing hollow piles in the ground
EP3251795A1 (en) Apparatus and method for working on mineral workpieces, surfaces and/or structure sections
DE19523679C1 (en) Rail-borne track repair machine with shuttering and excavating devices
EP4311882A1 (en) Slurry wall cutter and method for creating a milled slot in the ground
EP4198204A1 (en) Milling device and method for milling the ground
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

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 1325991

Country of ref document: AT

Kind code of ref document: T

Effective date: 20230321

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

Ref country code: TR

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: AT

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

Effective date: 20230321