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 PDFInfo
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002002 slurry Substances 0.000 title 1
- 238000004140 cleaning Methods 0.000 claims abstract description 98
- 238000005520 cutting process Methods 0.000 claims abstract description 81
- 238000003801 milling Methods 0.000 claims abstract description 75
- 239000012530 fluid Substances 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000002689 soil Substances 0.000 claims abstract description 36
- 238000007599 discharging Methods 0.000 claims abstract 2
- 230000036346 tooth eruption Effects 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 8
- 238000009966 trimming Methods 0.000 claims description 6
- 239000007788 liquid Substances 0.000 description 11
- 230000018109 developmental process Effects 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 5
- 239000004927 clay Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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.
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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
Ein anderes Verfahren zum Herstellen eines Schlitzwandsegmentes im Boden geht aus der
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
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
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 und2 ; - 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.
- 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 and2 ; - 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
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
Die in den
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
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
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
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
Claims (14)
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).
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.
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).
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).
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.
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.
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.
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.
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.
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.
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.
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).
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.
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)
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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)
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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 |
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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 |
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