EP3296468B1 - Method and trench cutter for creating a slit in the ground - Google Patents

Method and trench cutter for creating a slit in the ground Download PDF

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Publication number
EP3296468B1
EP3296468B1 EP16188961.3A EP16188961A EP3296468B1 EP 3296468 B1 EP3296468 B1 EP 3296468B1 EP 16188961 A EP16188961 A EP 16188961A EP 3296468 B1 EP3296468 B1 EP 3296468B1
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EP
European Patent Office
Prior art keywords
fluid
trench
cutter
ground
cutting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16188961.3A
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German (de)
French (fr)
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EP3296468A1 (en
Inventor
Thomas VOHS
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 Maschinen GmbH
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Bauer Maschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to EP16188961.3A priority Critical patent/EP3296468B1/en
Priority to JP2017161810A priority patent/JP6636999B2/en
Priority to CN201710838092.4A priority patent/CN107829456B/en
Publication of EP3296468A1 publication Critical patent/EP3296468A1/en
Application granted granted Critical
Publication of EP3296468B1 publication Critical patent/EP3296468B1/en
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Classifications

    • 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
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/08—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging wheels turning round an axis
    • 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
    • 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
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22—Component parts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
    • E02F5/14—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids

Definitions

  • the invention relates to a method for producing a slot in the ground by means of a trench cutter having at its lower, bottom end at least a pair of cutting wheels, which are rotationally driven and soil material is removed to form a slot, wherein at least one fluid nozzle on the trench wall cutter a fluid is introduced into the slot, according to the preamble of claim 1.
  • the invention further relates to a trench wall cutter having a trimming frame, at the lower, bottom end of which at least one pair of cutting wheels is rotatably drivable and having at least one fluid nozzle for feeding a fluid into the slot, according to the preamble of claim 7.
  • a generic device for producing a slot in the ground is for example from the EP 0 903 443 A2 known.
  • this device two pairs of cutting wheels are arranged on a milling frame.
  • the cutting wheels are arranged in pairs on a common Frässchild on the cutter frame, which is suspended from a support cable.
  • the suspension point of the suspension cable can be adjusted. For this purpose, a special adjustment is provided.
  • a trench cutter known, which is formed with a compact wedge-shaped milling frame, which is guided via a rigid guide rod from the outside in the milling slot. Between the cutting wheel pairs, a suspension is fed, which is mixed in situ with abraded soil material to a soil mortar. For a high directional stability, a correspondingly dimensioned guide rod is to be provided, in particular for larger slot depths.
  • a trench wall cutter In the milling operation, a trench wall cutter can be deflected by a usually vertical milling direction due to conditions in the ground, such as individual rocks or varying soil densities. With the known control devices such deviations should be counteracted. An exact directional control of the milling cutter is essential for accurate positioning of the milling slot in the ground.
  • the present invention has for its object to provide a method and a trench wall cutter for creating a slot in the ground, which allow in an efficient manner a precise position producing a slot in the ground.
  • the object is achieved according to the invention on the one hand by a method with the feature of claim 1 and on the other hand by a trench cutter with the features of claim 7.
  • the inventive method for creating a slot in the ground is characterized in that a position of the trench wall cutter is controlled in the slot via a plurality of fluid nozzles, which are supplied by a control means defined with fluid.
  • the invention is based on the recognition that the milling action of a cutting wheel depends on the supply of flushing fluid into the area of the cutting wheel. With sufficient fluid supply increased soil erosion is achieved.
  • a first basic idea of the invention is to selectively supply a fluid to individual regions of the trench wall cutter, in particular in a contact region of the cutting wheels with the ground. As a result, the removal rate of the individual cutting wheels and thus the orientation and position of the cutter can be influenced in the soil. Without great expenditure on equipment such a direction control of a trench wall cutter is possible.
  • At least two fluid nozzles may be provided, wherein each of the fluid nozzles may be individually controllable and may be individually adaptable in the amount of fluid delivered. Each fluid nozzle is assigned to a cutting wheel.
  • the region or contact region is to be understood as the working face, which is contacted by the cutting wheels of the trench wall cutter.
  • This area can be both an area lying below the respective cutting wheel or the cutting wheels and a lateral area which is contacted by milling teeth of the respective milling wheels. If only one pair of cutting wheels is provided, each of the cutting wheels can have a lower contact area with the ground. Thus, such a milling device would therefore have two lower areas in which the milling device is in contact with the ground.
  • the fluid nozzles can be assigned to individual contact areas with the ground or directly to individual cutting wheels or cutting wheel pairs. Also, the fluid nozzles may be associated with individual sides of the milling device.
  • a further aspect of the invention can be seen in the fact that a plurality of fluid nozzles, which are provided on the trench cutter according to the invention, a uniform ground quality or a uniform milling progress of the individual cutting wheels of the trench wall cutter, in particular by a change in the soil texture by the supplied fluid to allow.
  • a fluid quantity and / or a pressure of the fluid to be set by the control device.
  • the fluid nozzles can be assigned by the control device as needed, a separate fluid pressure or its own fluid flow rate, which is supplied to the cutting wheels or the bottom, in particular in the respective contact area.
  • the fluid may be water, a rinse suspension or a curable suspension which may form a building in the ground, such as a slot or seal wall.
  • the fluid can also be a lubricant, in particular water, which can promote the removal of soil material by means of the trench wall cutter.
  • fluid is injected into the area of the cutting wheels for attitude control. It has been found that the fluid can reach its potential with regard to changes in the soil condition of the soil material to be removed particularly expedient if it is fed directly, or at least in a region of the cutting wheels. Thus, it can be ensured that the fluid acts primarily in the region of the soil to be removed, which requires a treatment for matching the soil condition to further soil areas to be removed.
  • At least one fluid nozzle is assigned to each cutting wheel or pair of cutting wheels, wherein a different soil removal is set on the cutting wheels via a different fluid supply.
  • an alignment of the ground conditions in the total area of the cutting wheels of the trench wall cutter can be achieved and at the same time one possibly adverse supply of particularly high amounts of fluid in individual areas of the soil to be prevented.
  • an unfavorable mixing ratio of fluid and abraded soil material in the milled slot can be counteracted.
  • the fluid injected is a suspension which is mixed in the slot with the removed soil material to form a concrete.
  • this can harden with the soil material removed to form a structure.
  • the cutting wheels can be used advantageously for the mixing of the fluid with the removed soil material.
  • the suspension may be hardening, so that a single-phase method is made possible.
  • a base suspension for example a bentonite suspension, is first injected during milling. This serves for soil liquefaction and supporting the slot. Subsequently, especially when pulling the milling cutter, an additional medium can be injected, through which the soil mixture hardens. This allows a two-phase process.
  • a slot wall segment is formed in the slot. This may preferably be formed from fluid mixed with ablated soil material. Alternatively, the slot in the ground can also be freed of soil material and then filled with a suitable hardenable mass.
  • the trench wall cutter according to the invention with a trimming frame, in particular for creating a slot in a floor is characterized in that a plurality of fluid nozzles are provided, which can be supplied with fluid differently via a control device, wherein individual targeted changes in position of the trench wall cutter can be effected.
  • fluid nozzles to be arranged on the trench wall cutter, in particular in a lower region near the milling wheel. These can be controlled individually by means of the control device and designed to deliver individually adjustable amounts of fluid to the milling slot.
  • the fluid nozzles are arranged in the region of the cutting wheels and designed to supply fluid to a milling area in the ground in the vicinity of the cutting wheels, in particular below the same.
  • a targeted supply of fluid in the region of the soil, which is to be removed by the cutting wheels be possible.
  • At least one fluid nozzle is assigned to each cutting wheel or pair of cutting wheels.
  • this can also be a control nozzle, which can be designed to influence a position of the trench wall cutter in the ground. This can be made possible in particular by matching the soil condition in the region of the individual cutting wheels, in particular below the cutting wheels.
  • control device is connected to a device for determining the position of the trench wall cutter and is designed to supply a supply of fluid in the slot position correcting and / or position stabilizing. If a deviation of the orientation of the trench wall cutter from a vertical, or a previously defined orientation, for example, with a defined angle to the vertical, be recognized, the means for determining the position of the trench wall cutter can be configured to transmit the particular deviation to the control device.
  • the control device can counteract the deviation of the position. This can be promoted in particular by the fact that the control device ensures increased fluid supply to one of the lower regions of the trench wall cutter, which has a lower milling progress than the remaining cutting wheels.
  • the control device can enable a reduced supply of fluid in a region of the cutting wheels with increased milling progress, whereby a reduction of this milling progress to the Fräsfor Marinlomimony the remaining cutting wheels can be adjusted.
  • the trench wall cutter it is particularly preferred for the trench wall cutter to have an approximately cuboid base body and for at least one fluid nozzle to be arranged on at least one longitudinal side and / or one broad side of the base body.
  • the alignment of fluid nozzles in different spatial directions with respect to the main body of the milling device can allow a particularly accurate and efficient influencing of the soil properties in a certain area of the cutting wheels. This may be conducive in particular to a corrected orientation of the trench wall cutter with respect to any orientation relative to a horizontal.
  • the fluid nozzles on several sides of the main body of the trench wall cutter can thus be advantageous in particular for both a deviation of the position along a longitudinal side and a broad side of the base body, ie an inclined position to two spatial directions.
  • At least one fluid nozzle is arranged on each longitudinal side of the milling blade. So fluid nozzles can not only be assigned to individual cutting wheels or Fräsradformen, but also cutting wheels on the respective side of the milling blades.
  • Fig. 1 shows a trench wall cutter 10, which has at least one cutting wheel 20 at a lower area. This is arranged on a milling blade 40, wherein on both sides of the milling blade 40 at least one cutting wheel 20 can be provided (not shown).
  • the broken circles around the cutting wheels are the Abradsradius of the cutting wheels and these are not components of the devices.
  • the at least one cutting wheel 20 can in particular be driven by hydraulic means, which can be supplied with hydraulic fluid by means of the fluid lines 50.
  • lines 51 can be provided, by means of which a fluid can be supplied.
  • the fluid lines 51 can be provided in particular in a central region 60 of the milling frame 70.
  • At least two cutting wheels 20 or two pairs of cutting wheels 20 are arranged at the lower end of the milling device 10.
  • at least one cutting wheel 20 can be arranged on each side of the milling blade 40.
  • Four milling wheels 20 are particularly preferably provided on the milling device 10, wherein in each case two of the cutting wheels 20 are arranged on each side of the milling blade 40.
  • the fluid nozzles 30 may in particular be associated with individual cutting wheels 20, the fluid nozzles 30 providing fluid in a lower region of the cutting wheel.
  • the fluid nozzles 30 may in particular be provided between the intended cutting wheels 20 on one side of the milling blade 40.
  • fluid nozzles 31 can also be assigned to one side of the milling blade 40.
  • fluid nozzles 32 may be arranged on a milling cutter pair on an end face of the milling cutter 40.
  • the fluid nozzles 31 and 32 may be provided individually and independently of each other on the milling device 10.
  • at least the fluid nozzles 31 and the fluid nozzles 32 are provided.
  • the fluid nozzles 30 may be provided between the cutting wheels.
  • all fluid nozzles can be controlled individually by means of the control device 80.
  • each cutting wheel 20 individually as well as individual Fräsradministeren or one side of the Fräsradschildes 40 are supplied as needed fluid, whereby the soil condition of the soil material, which is to be removed by means of the cutting wheels 20, can be influenced.
  • a supply of fluid can take place in individual regions of the milling device, in particular on the basis of the position of the milling device in the bottom. This can be done both by increasing and decreasing the supply of fluid into the milling space.
  • the position of the milling device can be determined by means of a corresponding device 90, which can transmit the position data to the control device 80.
  • the fluid nozzles 30, 31, 32 can thus be used individually in particular as control nozzles for correcting the position of the milling device 10 in a floor.
  • the fluid may in particular be a suspension which is mixed with the soil material.
  • the suspension initially serves to liquefy the soil and does not cure yet.
  • a curing agent or binder is supplied, wherein from the soil-suspension mixture, a component can be formed in the soil.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Road Repair (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Schlitzes im Boden mittels einer Schlitzwandfräse, welche an ihrem unteren, bodenseitigen Ende mindestens ein Paar von Fräsrädern aufweist, welche drehend angetrieben werden und Bodenmaterial unter Ausbildung eines Schlitzes abgetragen wird, wobei über mindestens eine Fluiddüse an der Schlitzwandfräse ein Fluid in den Schlitz eingeleitet wird, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for producing a slot in the ground by means of a trench cutter having at its lower, bottom end at least a pair of cutting wheels, which are rotationally driven and soil material is removed to form a slot, wherein at least one fluid nozzle on the trench wall cutter a fluid is introduced into the slot, according to the preamble of claim 1.

Die Erfindung betrifft weiterhin eine Schlitzwandfräse mit einem Fräsrahmen, an dessen unterem, bodenseitigen Ende mindestens ein Paar von Fräsrädern drehend antreibbar gelagert ist und mit mindestens einer Fluiddüse zum Zuführen eines Fluides in den Schlitz, gemäß dem Oberbegriff des Anspruchs 7.The invention further relates to a trench wall cutter having a trimming frame, at the lower, bottom end of which at least one pair of cutting wheels is rotatably drivable and having at least one fluid nozzle for feeding a fluid into the slot, according to the preamble of claim 7.

Eine gattungsgemäße Vorrichtung zum Herstellen eines Schlitzes im Boden ist beispielsweise aus der EP 0 903 443 A2 bekannt. Bei dieser Vorrichtung sind an einem Fräsrahmen zwei Paare von Fräsrädern angeordnet. Die Fräsräder sind paarweise über ein gemeinsames Frässchild an dem Fräsrahmen angeordnet, welcher an einem Tragseil aufgehängt ist. Zur Lagesteuerung der Fräse kann der Aufhängepunkt des Tragseils verstellt werden. Hierzu ist eine spezielle Verstelleinrichtung vorgesehen.A generic device for producing a slot in the ground is for example from the EP 0 903 443 A2 known. In this device, two pairs of cutting wheels are arranged on a milling frame. The cutting wheels are arranged in pairs on a common Frässchild on the cutter frame, which is suspended from a support cable. For attitude control of the milling cutter, the suspension point of the suspension cable can be adjusted. For this purpose, a special adjustment is provided.

Bei seilaufgehängten Schlitzwandfräsen ist es weiterhin bekannt, am Fräsrahmen Steuerplatten vorzusehen, welche gegenüber dem Rahmen verstellt werden können. Hierdurch kann die Lage der Fräse im Frässchlitz geändert werden.In cable-suspended trench wall milling, it is also known to provide the milling frame control plates, which can be adjusted relative to the frame. As a result, the position of the milling cutter in the milling slot can be changed.

Weiterhin ist aus der EP 1 452 645 B1 eine Schlitzwandfräse bekannt, welche mit einem kompakten keilförmigen Fräsrahmen ausgebildet ist, welcher über eine starre Führungsstange von außen im Frässchlitz geführt wird. Zwischen den Fräsradpaaren wird eine Suspension zugeführt, welche in situ mit abgetragenem Bodenmaterial zu einem Bodenmörtel vermengt wird. Für eine hohe Richtungsstabilität ist insbesondere bei größeren Schlitztiefen eine entsprechend dimensionierte Führungsstange vorzusehen.Furthermore, from the EP 1 452 645 B1 a trench cutter known, which is formed with a compact wedge-shaped milling frame, which is guided via a rigid guide rod from the outside in the milling slot. Between the cutting wheel pairs, a suspension is fed, which is mixed in situ with abraded soil material to a soil mortar. For a high directional stability, a correspondingly dimensioned guide rod is to be provided, in particular for larger slot depths.

Im Fräsbetrieb kann eine Schlitzwandfräse aufgrund von Gegebenheiten im Boden, etwa einzelnen Felsen oder variierenden Bodendichten, von einer üblicherweise vertikalen Fräsrichtung abgelenkt werden. Mit den bekannten Steuereinrichtungen soll derartigen Abweichungen entgegengewirkt werden. Eine exakte Richtungssteuerung der Fräse ist für ein positionsgenaues Erstellen des Frässchlitzes im Boden von wesentlicher Bedeutung.In the milling operation, a trench wall cutter can be deflected by a usually vertical milling direction due to conditions in the ground, such as individual rocks or varying soil densities. With the known control devices such deviations should be counteracted. An exact directional control of the milling cutter is essential for accurate positioning of the milling slot in the ground.

Aus der EP 1 748 110 B1 ist eine Schlitzwandfräse bekannt, welche mit zusätzlichen Mischelementen versehen ist.From the EP 1 748 110 B1 a trench cutter is known, which is provided with additional mixing elements.

Aus der JP 11-200404 A1 geht eine Schlitzwandfräse mit Fräsrädern hervor, an deren Frontseiten zur Verbreiterung des Fräsquerschnitts Abtragsdüsen angeordnet sind.From the JP 11-200404 A1 goes out a trench wall cutter with cutting wheels, on the front sides for broadening the milling cross-section Abtragsdüsen are arranged.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren sowie eine Schlitzwandfräse zum Erstellen eines Schlitzes im Boden anzugeben, welche in effizienter Weise ein positionsgenaues Herstellen eines Schlitzes im Boden ermöglichen.The present invention has for its object to provide a method and a trench wall cutter for creating a slot in the ground, which allow in an efficient manner a precise position producing a slot in the ground.

Die Aufgabe wird nach der Erfindung einerseits durch ein Verfahren mit dem Merkmal des Anspruchs 1 und andererseits durch eine Schlitzwandfräse mit den Merkmalen des Anspruchs 7 gelöst.The object is achieved according to the invention on the one hand by a method with the feature of claim 1 and on the other hand by a trench cutter with the features of claim 7.

Vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen, der Beschreibung und den Figuren angegeben.Advantageous embodiments are given in the dependent claims, the description and the figures.

Das erfindungsgemäße Verfahren zum Erstellen eines Schlitzes im Boden ist dadurch gekennzeichnet, dass eine Lage der Schlitzwandfräse im Schlitz über mehrere Fluiddüsen gesteuert wird, welche mittels einer Steuereinrichtung definiert mit Fluid versorgt werden.The inventive method for creating a slot in the ground is characterized in that a position of the trench wall cutter is controlled in the slot via a plurality of fluid nozzles, which are supplied by a control means defined with fluid.

Die Erfindung beruht auf der Erkenntnis, dass die Fräswirkung eines Fräsrades von der Zuführung von Spülfluid in den Bereich des Fräsrades abhängt. Bei ausreichender Fluidzuführung wird ein erhöhter Bodenabtrag erzielt.The invention is based on the recognition that the milling action of a cutting wheel depends on the supply of flushing fluid into the area of the cutting wheel. With sufficient fluid supply increased soil erosion is achieved.

Ein erster Grundgedanke der Erfindung besteht darin, gezielt einzelnen Bereichen der Schlitzwandfräse, insbesondere in einem Kontaktbereich der Fräsräder mit dem Boden, ein Fluid zuzuführen. Hierdurch kann die Abtragsleistung der einzelnen Fräsräder und damit die Ausrichtung und Lage der Fräse im Boden beeinflusst werden. Ohne großen apparativen Aufwand ist so eine Richtungssteuerung einer Schlitzwandfräse möglich.A first basic idea of the invention is to selectively supply a fluid to individual regions of the trench wall cutter, in particular in a contact region of the cutting wheels with the ground. As a result, the removal rate of the individual cutting wheels and thus the orientation and position of the cutter can be influenced in the soil. Without great expenditure on equipment such a direction control of a trench wall cutter is possible.

Es können mindestens zwei Fluiddüsen vorgesehen sein, wobei jede der Fluiddüsen einzeln ansteuerbar sein kann und individuell in der Menge an abgegebenem Fluid anpassbar sein kann. Jede Fluiddüse ist dabei einem Fräsrad zugeordnet.At least two fluid nozzles may be provided, wherein each of the fluid nozzles may be individually controllable and may be individually adaptable in the amount of fluid delivered. Each fluid nozzle is assigned to a cutting wheel.

Erfindungsgemäß ist mit Bereich beziehungsweise Kontaktbereich die Ortsbrust zu verstehen, welche durch die Fräsräder der Schlitzwandfräse kontaktiert wird. Dieser Bereich kann sowohl eine unter dem jeweiligen Fräsrad beziehungsweise den Fräsrädern liegender Bereich als auch ein seitlicher Bereich sein, welcher durch Fräszähne der jeweiligen Fräsräder kontaktiert wird. Ist lediglich ein Fräsradpaar vorgesehen, kann jedes der Fräsräder einen unteren Kontaktbereich mit dem Boden aufweisen. Eine solche Fräsvorrichtung hätte demnach also zwei untere Bereiche, in denen die Fräsvorrichtung mit dem Boden in Kontakt steht. Die Fluiddüsen können einzelnen Kontaktbereichen mit dem Boden oder unmittelbar einzelnen Fräsrädern oder Fräsradpaaren zugeordnet sein. Auch können die Fluiddüsen einzelnen Seiten der Fräsvorrichtung zugeordnet sein.In accordance with the invention, the region or contact region is to be understood as the working face, which is contacted by the cutting wheels of the trench wall cutter. This area can be both an area lying below the respective cutting wheel or the cutting wheels and a lateral area which is contacted by milling teeth of the respective milling wheels. If only one pair of cutting wheels is provided, each of the cutting wheels can have a lower contact area with the ground. Thus, such a milling device would therefore have two lower areas in which the milling device is in contact with the ground. The fluid nozzles can be assigned to individual contact areas with the ground or directly to individual cutting wheels or cutting wheel pairs. Also, the fluid nozzles may be associated with individual sides of the milling device.

Ein weiterer Aspekt der Erfindung kann darin gesehen werden, über mehrere Fluiddüsen, welche an der erfindungsgemäßen Schlitzwandfräse vorgesehen sind, eine möglichst gleichmäßige Bodenbeschaffenheit beziehungsweise einen gleichmäßigen Fräsfortschritt der einzelnen Fräsräder der Schlitzwandfräse, insbesondere durch eine Veränderung der Bodenbeschaffenheit durch das zugeführte Fluid, zu ermöglichen.A further aspect of the invention can be seen in the fact that a plurality of fluid nozzles, which are provided on the trench cutter according to the invention, a uniform ground quality or a uniform milling progress of the individual cutting wheels of the trench wall cutter, in particular by a change in the soil texture by the supplied fluid to allow.

Nach einer Weiterbildung der Erfindung ist es vorgesehen, dass durch die Steuerungseinrichtung eine Fluidmenge und/oder ein Druck des Fluids eingestellt werden. Jeder der Fluiddüsen kann durch die Steuerungseinrichtung bedarfsgerecht ein eigener Fluiddruck beziehungsweise eine eigene Fluidfördermenge zugeordnet werden, welche den Fräsrädern beziehungsweise dem Bohrgrund, insbesondere im jeweiligen Kontaktbereich zugeführt wird. Hierfür können Verstellpumpen oder ansteuerbare Stellventile vorgesehen sein. Das Fluid kann Wasser, eine Spülsuspension oder eine aushärtbare Suspension sein, welche einen Baukörper in dem Boden, etwa eine Schlitz- oder Dichtwand, bilden kann. Bedarfsgerecht kann es sich bei dem Fluid jedoch auch um ein Schmiermittel, insbesondere um Wasser handeln, welches den Abtrag von Bodenmaterial mittels der Schlitzwandfräse begünstigen kann. Ein Angleichen der Bodenbeschaffenheit im Bereich der Fräsräder und somit ein Angleichen des Fräsfortschritts an den einzelnen Fräsrädern kann sowohl über die Fluidmenge als auch über den Druck, mit welchem das Fluid dem Abtragsbereich der Fräsräder zugeführt wird, erreicht werden.According to a development of the invention, provision is made for a fluid quantity and / or a pressure of the fluid to be set by the control device. Everyone The fluid nozzles can be assigned by the control device as needed, a separate fluid pressure or its own fluid flow rate, which is supplied to the cutting wheels or the bottom, in particular in the respective contact area. For this adjustment pumps or controllable control valves can be provided. The fluid may be water, a rinse suspension or a curable suspension which may form a building in the ground, such as a slot or seal wall. However, as required, the fluid can also be a lubricant, in particular water, which can promote the removal of soil material by means of the trench wall cutter. An adaptation of the soil condition in the area of the cutting wheels and thus an adaptation of the milling progress on the individual cutting wheels can be achieved both by the amount of fluid and by the pressure with which the fluid is supplied to the removal area of the cutting wheels.

Besonders zweckmäßig nach einer Weiterbildung der vorliegenden Erfindung ist es, dass zur Lagesteuerung Fluid in den Bereich der Fräsräder eingespritzt wird. Es konnte festgestellt werden, dass das Fluid sein Potential hinsichtlich der Veränderungen der Bodenbeschaffenheit des abzutragenden Bodenmaterials besonders zweckmäßig erreichen kann, wenn dieses unmittelbar, oder zumindest in einem Bereich der Fräsräder zugeführt wird. Somit kann gewährleistet werden, dass das Fluid vornehmlich in dem Bereich des abzutragenden Bodens wirkt, welcher eine Behandlung zum Angleichen der Bodenbeschaffenheit an weitere abzutragende Bodenbereiche erfordert.It is particularly expedient according to a development of the present invention that fluid is injected into the area of the cutting wheels for attitude control. It has been found that the fluid can reach its potential with regard to changes in the soil condition of the soil material to be removed particularly expedient if it is fed directly, or at least in a region of the cutting wheels. Thus, it can be ensured that the fluid acts primarily in the region of the soil to be removed, which requires a treatment for matching the soil condition to further soil areas to be removed.

Besonders bevorzugt ist es nach einer Weiterbildung der Erfindung, dass jedem Fräsrad oder Fräsradpaar mindestens eine Fluiddüse zugeordnet ist, wobei an den Fräsrädern über eine unterschiedliche Fluidzufuhr ein unterschiedlicher Bodenabtrag eingestellt wird. Insbesondere bei besonders großen Unterschieden der Bodenbeschaffenheit an einzelnen der Fräsrädern kann es vorteilhaft sein, zum einen in einem Bereich mit erhöhter Bodendichte die Fluidzufuhr zu erhöhen und in einem weiteren Bereich mit geringerer Bodendichte die Fluidzufuhr zu verringern. Selbiges kann auch unabhängig von den Bodendichten, jedoch bei unterschiedlichem Fräsfortschritt gelten. Hierdurch kann ein Angleichen der Bodenbeschaffenheiten im Gesamtbereich der Fräsräder der Schlitzwandfräse erreicht werden und gleichzeitig einer möglicherweise nachteiligen Zufuhr von besonders hohen Mengen an Fluid in einzelnen Bereichen des Bodens vorgebeugt werden. Somit kann einem ungünstigen Mischverhältnis von Fluid und abgetragenem Bodenmaterial in dem gefrästen Schlitz entgegengewirkt werden.According to a development of the invention, it is particularly preferred that at least one fluid nozzle is assigned to each cutting wheel or pair of cutting wheels, wherein a different soil removal is set on the cutting wheels via a different fluid supply. In particular, in the case of particularly large differences in the soil condition on individual ones of the cutting wheels, it may be advantageous, on the one hand, to increase the fluid supply in a region with increased soil density and to reduce the fluid supply in a further region with lower soil density. The same can apply regardless of the soil densities, but with different milling progress. As a result, an alignment of the ground conditions in the total area of the cutting wheels of the trench wall cutter can be achieved and at the same time one possibly adverse supply of particularly high amounts of fluid in individual areas of the soil to be prevented. Thus, an unfavorable mixing ratio of fluid and abraded soil material in the milled slot can be counteracted.

Besonders bevorzugt ist nach einer Weiterbildung der Erfindung, dass das als Fluid eine Suspension eingespritzt wird, welche in dem Schlitz mit dem abgetragenen Bodenmaterial zu einem Beton vermengt wird. Bei geeigneter Zufuhrmenge von Fluid in den Fräsbereich der Schlitzwandfräse kann diese mit abgetragenem Bodenmaterial zu einem Baukörper erhärten. Die Fräsräder können hierbei für die Durchmischung des Fluids mit dem abgetragenen Bodenmaterial vorteilhaft eingesetzt werden. Die Suspension kann dabei aushärtend ausgebildet sein, so dass ein Ein-Phasen-Verfahren ermöglicht wird. Vorzugsweise wird zunächst eine Grandsuspension, etwa eine Bentonitsuspension, beim Abfräsen eingespritzt. Diese dient zur Bodenverflüssigung und Stützen des Schlitzes. Anschließend, insbesondere beim Ziehen der Fräse, kann ein Zusatzmedium eingespritzt werden, durch welches die Bodenmischung aushärtet. Hierdurch ist ein Zwei-Phasen-Verfahren ermöglicht.According to a development of the invention, it is particularly preferred that the fluid injected is a suspension which is mixed in the slot with the removed soil material to form a concrete. With a suitable supply amount of fluid into the milling area of the trench wall cutter, this can harden with the soil material removed to form a structure. The cutting wheels can be used advantageously for the mixing of the fluid with the removed soil material. The suspension may be hardening, so that a single-phase method is made possible. Preferably, a base suspension, for example a bentonite suspension, is first injected during milling. This serves for soil liquefaction and supporting the slot. Subsequently, especially when pulling the milling cutter, an additional medium can be injected, through which the soil mixture hardens. This allows a two-phase process.

Besonders bevorzugt ist es nach der vorliegenden Erfindung, dass in dem Schlitz ein Schlitzwandsegment ausgebildet wird. Dieses kann vorzugsweise aus Fluid vermengt mit abgetragenen Bodenmaterial gebildet sein. Alternativ kann der Schlitz in dem Boden auch von Bodenmaterial befreit werden und anschließend mit einer geeigneten, härtbaren Masse befüllt werden.It is particularly preferred according to the present invention that a slot wall segment is formed in the slot. This may preferably be formed from fluid mixed with ablated soil material. Alternatively, the slot in the ground can also be freed of soil material and then filled with a suitable hardenable mass.

Die erfindungsgemäße Schlitzwandfräse mit einem Fräsrahmen, insbesondere zum Erstellen eines Schlitzes in einem Boden ist dadurch gekennzeichnet, dass mehrere Fluiddüsen vorgesehen sind, welche über eine Steuereinrichtung unterschiedlich mit Fluid versorgbar sind, wobei einzelne gezielte Lageänderungen der Schlitzwandfräse bewirkbar ist.The trench wall cutter according to the invention with a trimming frame, in particular for creating a slot in a floor, is characterized in that a plurality of fluid nozzles are provided, which can be supplied with fluid differently via a control device, wherein individual targeted changes in position of the trench wall cutter can be effected.

Nach einem Grundgedanken der vorliegenden Erfindung ist es vorgesehen, dass an der Schlitzwandfräse, insbesondere in einem unteren, fräsradnahen Bereich Fluiddüsen angeordnet sind. Diese können mittels der Steuereinrichtung individuell ansteuerbar sein und ausgebildet sein individuell einstellbare Mengen an Fluid an den Frässchlitz abzugeben.According to a basic idea of the present invention, provision is made for fluid nozzles to be arranged on the trench wall cutter, in particular in a lower region near the milling wheel. These can be controlled individually by means of the control device and designed to deliver individually adjustable amounts of fluid to the milling slot.

Vorzugsweise sind die Fluiddüsen im Bereich der Fräsräder angeordnet und ausgebildet, Fluid einem Fräsbereich im Boden in der Nähe der Fräsräder, insbesondere unterhalb der selbigen zuzuführen. Somit kann eine gezielte Zufuhr von Fluid in den Bereich des Bodens, welcher durch die Fräsräder abzutragen ist, ermöglicht sein.Preferably, the fluid nozzles are arranged in the region of the cutting wheels and designed to supply fluid to a milling area in the ground in the vicinity of the cutting wheels, in particular below the same. Thus, a targeted supply of fluid in the region of the soil, which is to be removed by the cutting wheels, be possible.

Besonders bevorzugt ist es nach der vorliegenden Erfindung, dass jedem Fräsrad oder Fräsradpaar mindestens eine Fluiddüse zugeordnet ist. Grundsätzlich kann es sich hierbei auch um eine Steuerdüse handeln, welche ausgebildet sein kann, eine Lage der Schlitzwandfräse in dem Boden zu beeinflussen. Dies kann insbesondere durch ein Angleichen der Bodenbeschaffenheit im Bereich der einzelnen Fräsräder, insbesondere unterhalb der Fräsräder, ermöglicht sein. Durch die Zuordnung einzelner Fluiddüse(n) zu den Fräsrädern oder Fräsradpaaren der Schlitzwandfräse kann besonders gezielt eine Einwirkung auf die Bodenbeschaffenheit im Bereich der einzelnen Fräsräder oder Fräsradpaare bewirkbar sein.According to the present invention, it is particularly preferred that at least one fluid nozzle is assigned to each cutting wheel or pair of cutting wheels. In principle, this can also be a control nozzle, which can be designed to influence a position of the trench wall cutter in the ground. This can be made possible in particular by matching the soil condition in the region of the individual cutting wheels, in particular below the cutting wheels. By assigning individual fluid nozzle (s) to the cutting wheels or Fräsradpaaren the trench wall cutter can be specifically targeted effect on the soil condition in the range of the individual cutting wheels or Fräsradpaare be effected.

Eine besonders zweckmäßige Weiterbildung der Erfindung besteht darin, dass die Steuereinrichtung mit einer Einrichtung zur Bestimmung der Lage der Schlitzwandfräse verbunden ist und ausgebildet ist, eine Zufuhr von Fluid in den Schlitz lagekorrigierend und/oder lagestabilisierend zuzuführen. Sollte eine Abweichung der Ausrichtung der Schlitzwandfräse von einer lotrechten, oder einer zuvor definierten Ausrichtung, beispielsweise mit einem definierten Winkel gegenüber der Lotrechten, erkannt werden, kann die Einrichtung zur Bestimmung der Lage der Schlitzwandfräse ausgebildet sein, die bestimmte Abweichung an die Steuereinrichtung zu übermitteln. Durch geeignete Fluidzufuhr in den Fräsbereich der Schlitzwandfräse kann die Steuereinrichtung der Abweichung der Lage entgegenwirken. Dies kann insbesondere dadurch begünstigt werden, dass die Steuereinrichtung für eine erhöhte Fluidzufuhr zu einem der unteren Bereiche der Schlitzwandfräse sorgt, welche einen geringeren Fräsfortschritt aufweist als die übrigen Fräsräder. Alternativ oder ergänzend zu der erhöhten Fluidzufuhr kann die Steuerungseinrichtung eine verringerte Fluidzufuhr in einem Bereich der Fräsräder mit erhöhtem Fräsfortschritt ermöglichen, wodurch eine Verringerung dieses Fräsfortschritts auf das Fräsfortschrittniveau der übrigen Fräsräder anpassbar sein kann.A particularly expedient development of the invention is that the control device is connected to a device for determining the position of the trench wall cutter and is designed to supply a supply of fluid in the slot position correcting and / or position stabilizing. If a deviation of the orientation of the trench wall cutter from a vertical, or a previously defined orientation, for example, with a defined angle to the vertical, be recognized, the means for determining the position of the trench wall cutter can be configured to transmit the particular deviation to the control device. By suitable fluid supply into the milling area of the trench wall cutter, the control device can counteract the deviation of the position. This can be promoted in particular by the fact that the control device ensures increased fluid supply to one of the lower regions of the trench wall cutter, which has a lower milling progress than the remaining cutting wheels. As an alternative or in addition to the increased fluid supply, the control device can enable a reduced supply of fluid in a region of the cutting wheels with increased milling progress, whereby a reduction of this milling progress to the Fräsforschrittniveau the remaining cutting wheels can be adjusted.

Besonders bevorzugt ist es nach der vorliegenden Erfindung, dass die Schlitzwandfräse einen in etwa quaderförmigen Grundkörper aufweist und dass sowohl an mindestens einer Längsseite und/oder einer Breitseite des Grundkörpers mindestens eine Fluiddüse angeordnet ist. Die Ausrichtung von Fluiddüsen nach verschiedenen Raumrichtungen in Bezug auf den Grundkörper der Fräsvorrichtung kann eine besonders genaue und effiziente Beeinflussung der Bodeneigenschaften in einem bestimmten Bereich der Fräsräder ermöglichen. Dies kann insbesondere hinsichtlich einer korrigierten Ausrichtung der Schlitzwandfräse bezüglich einer beliebigen Ausrichtung gegenüber einer Horizontalen zuträglich sein. Die Fluiddüsen an mehreren Seiten des Grundkörpers der Schlitzwandfräse können somit insbesondere für sowohl eine Abweichung der Lage entlang einer Längsseite als auch einer Breitseite des Grundkörpers, also einer Schräglage zu zwei Raumrichtungen hin, vorteilhaft sein.According to the present invention, it is particularly preferred for the trench wall cutter to have an approximately cuboid base body and for at least one fluid nozzle to be arranged on at least one longitudinal side and / or one broad side of the base body. The alignment of fluid nozzles in different spatial directions with respect to the main body of the milling device can allow a particularly accurate and efficient influencing of the soil properties in a certain area of the cutting wheels. This may be conducive in particular to a corrected orientation of the trench wall cutter with respect to any orientation relative to a horizontal. The fluid nozzles on several sides of the main body of the trench wall cutter can thus be advantageous in particular for both a deviation of the position along a longitudinal side and a broad side of the base body, ie an inclined position to two spatial directions.

Als besonders vorteilhaft wird es nach der Erfindung angesehen, dass an jeweils einer Längsseite des Frässchildes mindestens eine Fluiddüse angeordnet ist. Fluiddüsen können also nicht nur einzelnen Fräsrädern oder Fräsradpaaren, sondern auch Fräsrädern auf der jeweiligen Seite des Frässchilde zugeordnet sein.It is considered particularly advantageous according to the invention that at least one fluid nozzle is arranged on each longitudinal side of the milling blade. So fluid nozzles can not only be assigned to individual cutting wheels or Fräsradpaaren, but also cutting wheels on the respective side of the milling blades.

Die Erfindung wird nachfolgend anhand der beigefügten schematischen Zeichnungen weiter erläutert. In der Zeichnung zeigt:

Fig. 1
eine schematische Seitenansicht einer vorzugsweisen Ausführungsform der vorliegenden Erfindung.
The invention will be further explained with reference to the accompanying schematic drawings. In the drawing shows:
Fig. 1
a schematic side view of a preferred embodiment of the present invention.

Fig. 1 zeigt eine Schlitzwandfräse 10, welche an einem unteren Bereich mindestens ein Fräsrad 20 aufweist. Dieses ist an einem Frässchild 40 angeordnet, wobei an beiden Seiten des Frässchilds 40 mindestens ein Fräsrad 20 vorgesehen werden kann (nicht dargestellt). Bei den unterbrochenen Kreisen um die Fräsräder handelt es sich um den Abtragsradius der Fräsräder und diese sind nicht Bestandteile der Vorrichtungen. Das mindestens eine Fräsrad 20 kann insbesondere über hydraulische Mittel angetrieben werden, welche mittels der Fluidleitungen 50 mit Hydraulikflüssigkeit versorgt werden können. Weiterhin können Leitungen 51 vorgesehen werden, mittels welcher ein Fluid zuführbar ist. Die Fluidleitungen 51 können insbesondere in einem Mittenbereich 60 des Fräsrahmen 70 vorgesehen werden. Vorzugsweise sind in einem unteren insbesondere mittigen Bereich des Fräsrahmens mindestens eine Fluiddüse 30 angeordnet, mittels welcher das Fluid aus den Fluidleitungen 51 dem mindestens einen Fräsrad 20 zuführbar ist. Fig. 1 shows a trench wall cutter 10, which has at least one cutting wheel 20 at a lower area. This is arranged on a milling blade 40, wherein on both sides of the milling blade 40 at least one cutting wheel 20 can be provided (not shown). The broken circles around the cutting wheels are the Abradsradius of the cutting wheels and these are not components of the devices. The at least one cutting wheel 20 can in particular be driven by hydraulic means, which can be supplied with hydraulic fluid by means of the fluid lines 50. Furthermore, lines 51 can be provided, by means of which a fluid can be supplied. The fluid lines 51 can be provided in particular in a central region 60 of the milling frame 70. Preferably are in one at least one fluid nozzle 30, by means of which the fluid from the fluid conduits 51 can be fed to the at least one cutting wheel 20, is arranged at the bottom, in particular in the central region, of the milling frame.

Besonders bevorzugt sind mindestens zwei Fräsräder 20 beziehungsweise zwei Fräsradpaare 20 an dem unteren Ende der Fräsvorrichtung 10 angeordnet. Hierbei kann jeweils mindestens ein Fräsrad 20 auf jeweils einer Seite des Frässchildes 40 angeordnet sein. Besonders bevorzugt sind vier Fräsräder 20 an der Fräsvorrichtung 10 vorgesehen, wobei jeweils zwei der Fräsräder 20 auf jeweils einer Seite des Frässchildes 40 angeordnet sind. Die Fluiddüsen 30 können insbesondere einzelnen Fräsrädern 20 zugeordnet sein, wobei die Fluiddüsen 30 Fluid in einem unteren Bereich des Fräsrades zur Verfügung stellen. Hierzu können die Fluiddüsen 30 insbesondere zwischen den vorgesehenen Fräsrädern 20 einer Seite des Frässchildes 40 vorgesehen sein. Vorzugsweise können auch Fluiddüsen 31 einer Seite des Frässchildes 40 zugeordnet sein. Ebenfalls können Fluiddüsen 32 einem Fräsradpaar an einer Stirnseite des Frässchildes 40 angeordnet sein. Die Fluiddüsen 31 und 32 können einzeln und unabhängig voneinander an der Fräsvorrichtung 10 vorgesehen sein. Vorzugsweise sind mindestens die Fluiddüsen 31 als auch die Fluiddüsen 32 vorgesehen. Zusätzlich können auch die Fluiddüsen 30 zwischen den Fräsrädern vorgesehen sein. Grundsätzlich können alle Fluiddüsen mittels der Steuereinrichtung 80 einzeln angesteuert werden. Somit kann jedem Fräsrad 20 individuell sowie einzelnen Fräsradpaaren oder einer Seite des Fräsradschildes 40 bedarfsgerecht Fluid zugeführt werden, wodurch die Bodenbeschaffenheit des Bodenmaterials, welches mittels der Fräsräder 20 abgetragen werden soll, beeinflussbar ist.Particularly preferably, at least two cutting wheels 20 or two pairs of cutting wheels 20 are arranged at the lower end of the milling device 10. In this case, in each case at least one cutting wheel 20 can be arranged on each side of the milling blade 40. Four milling wheels 20 are particularly preferably provided on the milling device 10, wherein in each case two of the cutting wheels 20 are arranged on each side of the milling blade 40. The fluid nozzles 30 may in particular be associated with individual cutting wheels 20, the fluid nozzles 30 providing fluid in a lower region of the cutting wheel. For this purpose, the fluid nozzles 30 may in particular be provided between the intended cutting wheels 20 on one side of the milling blade 40. Preferably, fluid nozzles 31 can also be assigned to one side of the milling blade 40. Likewise, fluid nozzles 32 may be arranged on a milling cutter pair on an end face of the milling cutter 40. The fluid nozzles 31 and 32 may be provided individually and independently of each other on the milling device 10. Preferably, at least the fluid nozzles 31 and the fluid nozzles 32 are provided. In addition, the fluid nozzles 30 may be provided between the cutting wheels. In principle, all fluid nozzles can be controlled individually by means of the control device 80. Thus, each cutting wheel 20 individually as well as individual Fräsradpaaren or one side of the Fräsradschildes 40 are supplied as needed fluid, whereby the soil condition of the soil material, which is to be removed by means of the cutting wheels 20, can be influenced.

Ebenfalls kann mittels einer vorgesehenen Steuereinrichtung 80 insbesondere anhand der Lage der Fräsvorrichtung in dem Boden eine Zufuhr von Fluid in einzelnen Bereichen der Fräsvorrichtung, insbesondere im Bereich der Fräsräder 20 erfolgen. Dies kann sowohl mittels einer Erhöhung als auch einer Verringerung der Zufuhr von Fluid in den Fräsraum erfolgen. Die Lage der Fräsvorrichtung kann mittels einer entsprechenden Einrichtung 90 bestimmt werden, welche die Lagedaten an die Steuerungseinrichtung 80 übermitteln kann. Die Fluiddüsen 30, 31, 32 können somit individuell insbesondere als Steuerdüsen für eine Korrektur der Lage der Fräsvorrichtung 10 in einem Boden eingesetzt werden. Durch die Anordnung der Fluiddüsen gemäß dem vorzugsweisen Ausführungsbeispiel nach Fig. 1 kann eine besonders gute Durchmischung und/oder Verflüssigung des Bodenmaterials mit dem Fluid erreicht werden. Dies kann hinsichtlich eines Transports von Fluid in einen unteren Bereich der Fräsräder 20 zu dem abzutragenden Boden unterhalb der Fräsräder 20 vorteilhaft sein. Bei dem Fluid kann es sich insbesondere um eine Suspension handeln, welche mit dem Bodenmaterial vermengt wird. Die Suspension dient zunächst der Bodenverflüssigung und härtet noch nicht aus. Anschließend wird ein Härt- oder Bindemittel zugeführt, wobei aus der Boden-Suspensionsmischung ein Bauelement in dem Boden gebildet werden kann.Likewise, by means of a provided control device 80, in particular in the area of the cutting wheels 20, a supply of fluid can take place in individual regions of the milling device, in particular on the basis of the position of the milling device in the bottom. This can be done both by increasing and decreasing the supply of fluid into the milling space. The position of the milling device can be determined by means of a corresponding device 90, which can transmit the position data to the control device 80. The fluid nozzles 30, 31, 32 can thus be used individually in particular as control nozzles for correcting the position of the milling device 10 in a floor. By the arrangement of the fluid nozzles according to the preferred embodiment according to Fig. 1 a particularly good mixing and / or liquefaction of the soil material with the fluid can be achieved. This may be advantageous in terms of a transport of fluid into a lower region of the cutting wheels 20 to the soil to be removed below the cutting wheels 20. The fluid may in particular be a suspension which is mixed with the soil material. The suspension initially serves to liquefy the soil and does not cure yet. Subsequently, a curing agent or binder is supplied, wherein from the soil-suspension mixture, a component can be formed in the soil.

Claims (12)

  1. Method for producing a trench in the ground by means of a trench cutter (10) which has at its lower, ground-facing end at least one pair of cutting wheels (20) that are driven in a rotating manner and remove ground material whilst the trench is being designed, wherein a fluid is introduced into the trench via at least one fluid nozzle (30, 31, 32) on the trench cutter (10),
    characterized in that
    a position of the trench cutter (10) in the trench is controlled via several fluid nozzles (30, 31, 32) which are supplied in a defined manner with fluid by means of a control means (80).
  2. Method according to claim 1,
    characterized in that
    by the control means (80) a fluid quantity and/or a pressure of the fluid are set.
  3. Method according to claim 1 or 2,
    characterized in that
    for position control, fluid is injected in the area of the cutting wheels (20).
  4. Method according to any one of claims 1 to 3,
    characterized in that
    at least one fluid nozzle (30, 31, 32) is assigned to each cutting wheel (20) or cutting wheel pair, wherein on the cutting wheels (20) a different ground removal is set by a different feeding of fluid.
  5. Method according to any one of claims 1 to 4,
    characterized in that
    as fluid a suspension is injected which is mixed in the trench with the removed ground material to a ground concrete.
  6. Method according to any one of claims 1 to 5,
    characterized in that
    in the trench a diaphragm wall segment is designed.
  7. Trench cutter (10) with a cutter frame (70), in particular for a method for producing a trench in the ground according to any one of claims 1 to 6, at the lower, ground-facing end of which at least one pair of cutting wheels (20) is supported such that it can be driven in a rotating manner and with at least one fluid nozzle (30, 31, 32) for feeding a fluid into the trench,
    characterized in that
    several fluid nozzles (30, 31, 32) are provided which can be supplied differently with fluid via a control means (80), wherein a selective change of position of the trench cutter (10) can be brought about.
  8. Trench cutter according to claim 7,
    characterized in that
    the fluid nozzles (30, 31, 32) are arranged in the area of the cutting wheels (20) and designed to feed fluid to a cutting area in the ground close to the cutting wheels (20), in particular below these.
  9. Trench cutter according to claim 7 or 8,
    characterized in that
    at least one fluid nozzle (30, 31, 32) is assigned to each cutting wheel (20) or cutting wheel pair.
  10. Trench cutter according to any one of claims 7 to 9,
    characterized in that
    the control means (80) is connected to a means for determining the position of the trench cutter (10) and designed to carry out a feeding of fluid into the trench in a positionally corrective and/or positionally stabilizing manner.
  11. Trench cutter according to any one of claims 7 to 10,
    characterized in that
    the trench cutter (10) has an approximately cuboid base body and in that a fluid nozzle (31, 32) is arranged both on at least one longitudinal side and/or at least one broad side of the base body.
  12. Trench cutter according to any one of claims 7 to 11,
    characterized in that
    on each of a longitudinal side of the cutting shield (40) at least one fluid nozzle (32) is arranged.
EP16188961.3A 2016-09-15 2016-09-15 Method and trench cutter for creating a slit in the ground Active EP3296468B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16188961.3A EP3296468B1 (en) 2016-09-15 2016-09-15 Method and trench cutter for creating a slit in the ground
JP2017161810A JP6636999B2 (en) 2016-09-15 2017-08-25 Method of fabricating trench in ground and trench cutter
CN201710838092.4A CN107829456B (en) 2016-09-15 2017-09-15 Method for producing a trench in the ground and trench cutter

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EP16188961.3A EP3296468B1 (en) 2016-09-15 2016-09-15 Method and trench cutter for creating a slit in the ground

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EP3296468A1 EP3296468A1 (en) 2018-03-21
EP3296468B1 true EP3296468B1 (en) 2019-11-06

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DE202019102477U1 (en) * 2019-02-27 2020-06-03 Liebherr-Components Biberach Gmbh Drive device for a trench cutter
ES2911553T3 (en) * 2019-04-04 2022-05-19 Bauer Maschinen Gmbh Diaphragm wall milling device and method for milling a milling trench in the ground
BE1027872B1 (en) * 2019-12-17 2021-07-15 Smet F&C Nv PROCEDURE AND DEVICE FOR THE TREATMENT OF CLAYING AND RELATED MATERIALS
CN112095700B (en) * 2020-09-18 2022-09-09 江苏科弘岩土工程有限公司 Double round slot milling machine cutter head device with pendulum sword unit
EP4239130A1 (en) * 2022-03-01 2023-09-06 BAUER Maschinen GmbH Slurry wall cutter and method for creating a cut in the ground

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Publication number Publication date
CN107829456B (en) 2021-02-26
EP3296468A1 (en) 2018-03-21
JP2018044429A (en) 2018-03-22
JP6636999B2 (en) 2020-01-29
CN107829456A (en) 2018-03-23

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