EP3725950B1 - Slotted wall gripper and method for creating a slot in the ground - Google Patents

Slotted wall gripper and method for creating a slot in the ground Download PDF

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Publication number
EP3725950B1
EP3725950B1 EP19170133.3A EP19170133A EP3725950B1 EP 3725950 B1 EP3725950 B1 EP 3725950B1 EP 19170133 A EP19170133 A EP 19170133A EP 3725950 B1 EP3725950 B1 EP 3725950B1
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EP
European Patent Office
Prior art keywords
grab
trench
trench wall
measuring device
measured values
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
EP19170133.3A
Other languages
German (de)
French (fr)
Other versions
EP3725950A1 (en
Inventor
Stefan Roth
Johannes Sedlmeier
Jürgen Heilgemeir
Josef Haas
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
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Publication date
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Application filed by Bauer Maschinen GmbH filed Critical Bauer Maschinen GmbH
Priority to ES19170133T priority Critical patent/ES2929747T3/en
Priority to EP19170133.3A priority patent/EP3725950B1/en
Priority to CN202010306146.4A priority patent/CN111827385B/en
Publication of EP3725950A1 publication Critical patent/EP3725950A1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E02F3/4133—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device grabs carried out as loaders or mounted on a tractor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device
    • E02F3/4135—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted directly on a boom
    • 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
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/47—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets
    • E02F3/475—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets for making foundation slots
    • 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
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices
    • E02F9/264—Sensors and their calibration for indicating the position of the work tool
    • E02F9/265—Sensors and their calibration for indicating the position of the work tool with follow-up actions (e.g. control signals sent to actuate the work tool)

Definitions

  • the invention relates to a trench wall grab for creating a trench in the ground, with a grab frame, grab shovels attached thereto, which can be adjusted for grabbing soil material between an open position and a closed position in which soil material is picked up, and an actuating device which can be used to adjust the grab shovels between the open position and the closed position, according to the preamble of claim 1.
  • the invention also relates to a method for creating a slot in the ground, using a trench wall grab that has a grab frame at the lower end of which two grab scoops are arranged, which can be adjusted between an open position and a closed position by means of an actuating device, the grab scoops soil material grip and receive in a closed position according to the preamble of claim 10.
  • a generic diaphragm wall grab is from the EP 1 950 353 B1 and from the JP 2007 327334 A out. Such devices are used to dig recesses or slits in the ground, which are primarily required to create so-called slotted, retaining or sealing walls in the ground.
  • the diaphragm wall grab is usually lowered into the ground with the grab buckets open, with the grab buckets penetrating the top of the soil. By closing the grab shovels, soil material is grabbed and picked up in the diaphragm wall grab with the grab shovels then closed. The filled slurry wall grab is then from the
  • Slots for retaining or sealing walls can reach depths of up to 50 m or more.
  • the cross-section of the trench created with the diaphragm wall grab is in the range of around 1 m wide and between 1.5 and 3 m long. Due to this trench cross-section and the usual trench depths, a grab operator often has no opportunity to see the bottom of the trench, especially when the trench is filled with a suspension.
  • the invention is based on the object of specifying a trench wall grab and a method for creating a slot in the ground, with which a particularly effective operation of a trench wall grab is made possible.
  • the object is achieved on the one hand by a trench wall grab having the features of claim 1 and on the other hand by a method having the features of claim 10 .
  • Preferred embodiments of the invention are specified in the respective dependent claims.
  • the diaphragm wall grab according to the invention is characterized in that a measuring device is provided, which is designed to determine a path and/or pressure when the grab scoops close, and in that the measuring device is connected to a control unit for forwarding measured values that are determined, which is designed to make a statement about the soil material based on the measured values determined by the measuring device.
  • a basic idea of the invention is to detect and evaluate penetration of the grab shovels into the ground and/or closing in the ground.
  • a measuring device is provided which is designed to determine a path and/or pressure when the grab scoops close. He follows such as relatively easy entry and closure, this may indicate that there is a loose layer of soil, such as a layer of gravel or sand.
  • a control unit which is connected to the measuring device and evaluates the measured values determined.
  • the control unit can make a statement about the soil material on the basis of the measured values.
  • the control unit can also receive further measured values from other components of the diaphragm wall gripping device, which e.g. B. allow a statement about the current altitude of the diaphragm wall grab can be transmitted.
  • a trench wall grab operator to schedule an effective operation. For example, a drop height with the diaphragm wall grab and thus a force for inserting the diaphragm wall grab into the ground can be set.
  • a comparison with data from a previous grab operation can also be used to identify at an early stage if there is a layer of rock or an obstacle.
  • a decision can then be made as to whether the at least temporary use of another soil removal tool, such as a diaphragm wall bit for breaking up rock, makes sense for further effective excavation of the trench.
  • the control unit includes a database in which measured values known for specific soil types are stored. Based on a determined penetration path or a closing speed or an expenditure of force, which is recorded by the measuring device, the control unit can use the stored data to make a direct statement about the type of soil, such as sand, gravel, clay, rock.
  • the measuring device is designed to record a progression of the measured values over time and/or over a current depth of the trench. This allows additional information on the ground structure or the presence of an obstacle can be recorded. For example, it can be determined in this way that there may be an upper layer with loose soil material, while a soil layer with firmer soil material is present directly underneath. The same applies to reverse soil stratification. This information can also be used for the subsequent grabbing step and/or when grabbing adjacent slots to make the excavation process as efficient as possible.
  • control unit can indicate that an obstacle, in particular a boulder, has been gripped by the gripper shovels. This can be determined in particular by the fact that the grab shovels cannot be closed or cannot be closed completely. The presence of a boulder or other obstacle may require a modification or even an interruption of the process, such as the use of a different soil removal device.
  • the diaphragm wall grab can also be dropped from a greater height with the grab buckets open to smash the obstacle.
  • the measuring device is equipped with appropriate sensors, such as displacement sensors or pressure sensors. According to one embodiment of the invention, it is particularly expedient that the measured values can be recorded individually for each grab shovel. For example, an asymmetrical closing of the grab buckets can be determined. It is particularly advantageous that the control unit can determine the size and position of the obstacle in the slot. Information about the size and location of the obstruction in the slot is helpful in removing it.
  • the gripper shovels can be actuated in any way by appropriate actuators. This can also be an actuation by actuating cables. According to a development of the invention, it is particularly preferred that the actuating device has at least one actuating cylinder. This can be a central actuating cylinder for both grab shovels or one or more actuating cylinders for each grab shovel. In particular, the actuating cylinders are operated hydraulically.
  • the measuring device which can include a number of sensors or measuring transducers, can be arranged at any point or at a number of points on the trench wall grab.
  • the measuring device it is particularly expedient for the measuring device to be arranged on the at least one actuating cylinder.
  • a pressure in the actuating cylinder can be recorded as a measure of the necessary expenditure of force and/or a travel of a piston in the actuating cylinder.
  • the travel provides information about the closing and the position of the grab shovels.
  • a preferred embodiment of the invention consists in that the gripper shovels are pivotably mounted on pivot bolts, that sensors of the measuring device are provided on the pivot bolts and that the sensors are designed to detect forces and/or a pivot angle of the gripper shovels.
  • the sensors can be force measurement sensors and/or sensors for recording a setting position or the setting angle of the gripper shovels. With these values, a statement can be made as to whether there is an asymmetrical loading or opening of the grab shovels. This in turn allows conclusions to be drawn about the shape and arrangement of an obstacle, in particular a boulder.
  • the invention further comprises a trench wall gripping device with a trench wall gripper which is designed according to the invention described above. It is provided that the slurry wall grab is mounted on a carrier device so that it can be adjusted vertically.
  • the carrier device can in particular comprise a mobile undercarriage, preferably a crawler chassis and an upper carriage which can preferably be rotated thereon.
  • a mast is preferably arranged on the superstructure, along which a diaphragm wall grab is mounted so that it can be adjusted vertically by means of a cable suspension or a rigid actuating rod.
  • the method according to the invention is characterized in that by means of a measuring device, a path and/or a pressure when the gripper blades are closed is determined and that the measuring device forwards determined measured values to a control unit, which is designed to make a statement about the soil material on the basis of the measured values determined by the measuring device.
  • the method according to the invention can be carried out in particular with the slurry wall grab described above.
  • the advantages described above can be achieved in this way.
  • a preferred method variant of the invention consists in that the slot is filled with a suspension when it is made or subsequently, and that the suspension hardens in the slot and a slot wall segment is produced.
  • a diaphragm wall can be produced by a corresponding repeated production of an adjoining or overlapping diaphragm wall segment.
  • the slit wall can in particular serve as a supporting and/or sealing wall.
  • a diaphragm wall gripping device 10 comprises a carrier device 12 with a diaphragm wall gripper 20 attached thereto.
  • An approximately vertically directed mast 14 with a mast head 15 is articulated on the superstructure 13 .
  • the slurry wall grab 20 is attached to the carrier device 12 with the mast 14 in a vertically adjustable manner via a carrying cable 16 .
  • Hydraulic energy is supplied via a supply line 18 .
  • a supply line for power and data can also be provided.
  • the trench wall grab 20 has a box-shaped grab frame 22 .
  • a holding device 40 is arranged on its upper side, on which one end of the carrying cable 16 is attached.
  • the gripper scoops 24 are mounted. Plate-shaped guide elements 26 are adjustably mounted along the gripper frame 22 for position control.
  • An actuating device 30 for the lower gripper shovels 24 is arranged in a central area of the gripper frame 22, which is constructed like a scaffold.
  • the actuating device 30 comprises a hydraulically drivable actuating cylinder 32 in which a piston rod 34 is mounted so that it can be extended downwards.
  • the hydraulic actuating cylinder 32 is operated via the supply line 18 (in 2 not shown) supplied by the carrier device 12 with hydraulic energy.
  • a lower end of the piston rod 34 is linked to a carriage element 36 which is guided in a linearly displaceable manner along the gripper frame 22 .
  • Two levers 38 are articulated on the carriage element 36, each lever 38 being connected in an articulated manner to a gripper blade 24.
  • the grab scoops 24 themselves are articulated at a lower end of the grab frame 22 .
  • a measuring device not shown in detail in the figures is provided, which is arranged in particular on the actuating device 30 and preferably on the actuating cylinder 32 .
  • the measuring device is designed to determine an extension path of the piston rod 34 and a pressure in the actuating cylinder 32 when the grab shovels 24 are closed. This makes it possible to determine when the gripper shovels 24 grip an obstacle 8, such as a rock, when closing.
  • the measuring device can be used to determine that, despite an increase in pressure in the actuating cylinder 32 acting on both sides, a displacement path of the piston rod 34 and thus of the carriage element 36 is no longer possible changes.
  • This state which can be detected by the measuring device, can be used by a control unit, which is also not shown, as an indication of the presence of an obstacle.
  • the control unit can preferably be arranged on the carrier device 12 .
  • the measured values determined by the measuring device can be sent to the control unit via the supply line 18 or via a wireless connection. Based on the measured values obtained, the control unit can then make a statement about the presence of an obstacle or also about the existing ground material.
  • the information determined in this way can e.g. B. be communicated via a monitor to an operator in the superstructure 13 of the carrier device 12 or a distant center.
  • control unit can also make a statement about the size of the obstacle 8 .
  • the control unit can also make a statement about the position of the obstacle.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Soil Sciences (AREA)
  • Earth Drilling (AREA)

Description

Die Erfindung betrifft einen Schlitzwandgreifer zum Erstellen eines Schlitzes im Boden, mit einem Greiferrahmen, daran angebrachten Greiferschaufeln, welche zum Greifen von Bodenmaterial zwischen einer Öffnungsposition und einer Schließposition verstellbar sind, in welcher Bodenmaterial aufgenommen ist, und einer Betätigungseinrichtung, welche zum Verstellen der Greiferschaufeln zwischen der Öffnungsposition und der Schließposition ausgebildet ist, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a trench wall grab for creating a trench in the ground, with a grab frame, grab shovels attached thereto, which can be adjusted for grabbing soil material between an open position and a closed position in which soil material is picked up, and an actuating device which can be used to adjust the grab shovels between the open position and the closed position, according to the preamble of claim 1.

Die Erfindung betrifft weiterhin ein Verfahren zum Erstellen eines Schlitzes im Boden, wobei ein Schlitzwandgreifer eingesetzt wird, welcher einen Greiferrahmen aufweist, an dessen unterem Ende zwei Greiferschaufeln angeordnet sind, welche mittels einer Betätigungseinrichtung zwischen einer Öffnungsposition und einer Schließposition verstellbar sind, wobei die Greiferschaufeln Bodenmaterial greifen und in einer Schließposition aufnehmen, gemäß dem Oberbegriff des Anspruchs 10.The invention also relates to a method for creating a slot in the ground, using a trench wall grab that has a grab frame at the lower end of which two grab scoops are arranged, which can be adjusted between an open position and a closed position by means of an actuating device, the grab scoops soil material grip and receive in a closed position according to the preamble of claim 10.

Ein gattungsgemäßer Schlitzwandgreifer geht aus der EP 1 950 353 B1 und aus der JP 2007 327334 A hervor. Derartige Geräte dienen zum Ausheben von Ausnehmungen oder Schlitzen im Boden, welche vornehmlich zur Erstellung von sogenannten Schlitz-, Stütz- oder Abdichtwänden im Boden benötigt werden. Der Schlitzwandgreifer wird üblicherweise mit geöffneten Greiferschaufeln in den Boden abgesenkt, wobei die Greiferschaufeln in den oberen Bereich des Bodens eindringen. Durch Schließen der Greiferschaufeln wird Bodenmaterial gegriffen und in dem Schlitzwandgreifer mit den dann geschlossenen Greiferschaufeln aufgenommen. Der gefüllte Schlitzwandgreifer wird sodann aus demA generic diaphragm wall grab is from the EP 1 950 353 B1 and from the JP 2007 327334 A out. Such devices are used to dig recesses or slits in the ground, which are primarily required to create so-called slotted, retaining or sealing walls in the ground. The diaphragm wall grab is usually lowered into the ground with the grab buckets open, with the grab buckets penetrating the top of the soil. By closing the grab shovels, soil material is grabbed and picked up in the diaphragm wall grab with the grab shovels then closed. The filled slurry wall grab is then from the

Schlitz gezogen und zu einer Entleerstelle bewegt. Anschließend wird ein neuer Greifvorgang durchgeführt, bis die gewünschte Endtiefe des Schlitzes erreicht ist.Slot drawn and moved to a dump location. A new gripping process is then carried out until the desired final depth of the slot is reached.

Schlitze für Stütz- oder Abdichtwände können Tiefen von bis zu 50 m oder tiefer erreichen. Der mit dem Schlitzwandgreifer erzeugte Schlitzquerschnitt liegt dabei im Bereich von etwa 1 m Breite und einer Länge zwischen 1,5 bis 3 m. Aufgrund dieses Schlitzquerschnittes und der üblichen Schlitztiefen besteht für einen Greiferbediener häufig keine Sichtmöglichkeit auf die Sohle des Schlitzes, zumal wenn der Schlitz mit einer Suspension gefüllt ist.Slots for retaining or sealing walls can reach depths of up to 50 m or more. The cross-section of the trench created with the diaphragm wall grab is in the range of around 1 m wide and between 1.5 and 3 m long. Due to this trench cross-section and the usual trench depths, a grab operator often has no opportunity to see the bottom of the trench, especially when the trench is filled with a suspension.

Für einen effektiven Betrieb eines Schlitzwandgreifers ist es wünschenswert, Informationen zum zu bearbeitenden Bodenmaterial zu besitzen. Dies gilt insbesondere dann, wenn bei größeren Schlitztiefen ein Boden mit verschiedenen Bodenschichten durchörtert wird.For effective operation of a trench wall grab, it is desirable to have information about the soil material being processed. This applies in particular when a soil with different soil layers is penetrated with larger trench depths.

Der Erfindung liegt die Aufgabe zugrunde, einen Schlitzwandgreifer und ein Verfahren zum Erstellen eines Schlitzes im Boden anzugeben, mit welchen ein besonders effektiver Betrieb eines Schlitzwandgreifers ermöglicht werden.The invention is based on the object of specifying a trench wall grab and a method for creating a slot in the ground, with which a particularly effective operation of a trench wall grab is made possible.

Die Aufgabe wird nach der Erfindung zum einen durch einen Schlitzwandgreifer mit den Merkmalen des Anspruchs 1 und zum anderen durch ein Verfahren mit den Merkmalen des Anspruchs 10 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den jeweils abhängigen Ansprüchen angegeben.According to the invention, the object is achieved on the one hand by a trench wall grab having the features of claim 1 and on the other hand by a method having the features of claim 10 . Preferred embodiments of the invention are specified in the respective dependent claims.

Der erfindungsgemäße Schlitzwandgreifer ist dadurch gekennzeichnet, dass eine Messeinrichtung vorgesehen ist, welche zum Ermitteln eines Weges und/oder Druckes bei einem Schließen der Greiferschaufeln ausgebildet ist, und dass zum Weiterleiten von ermittelten Messwerten die Messeinrichtung mit einer Steuereinheit in Verbindung steht, welche ausgebildet ist, auf Grundlage der von der Messeinrichtung ermittelten Messwerte eine Aussage über das Bodenmaterial zu treffen.The diaphragm wall grab according to the invention is characterized in that a measuring device is provided, which is designed to determine a path and/or pressure when the grab scoops close, and in that the measuring device is connected to a control unit for forwarding measured values that are determined, which is designed to make a statement about the soil material based on the measured values determined by the measuring device.

Eine Grundidee der Erfindung liegt darin, ein Eindringen der Greiferschaufeln in den Boden und/oder das Schließen im Boden zu erfassen und auszuwerten. Gemäß der Erfindung ist eine Messeinrichtung vorgesehen, welche zum Ermitteln eines Weges und/oder Druckes bei einem Schließen der Greiferschaufeln ausgebildet ist. Erfolgt etwa ein relativ leichtes Eindringen und Schließen, kann dies ein Hinweis darauf sein, dass eine lockere Bodenschicht gegeben ist, etwa eine Kies- oder Sandschicht.A basic idea of the invention is to detect and evaluate penetration of the grab shovels into the ground and/or closing in the ground. According to the invention, a measuring device is provided which is designed to determine a path and/or pressure when the grab scoops close. He follows such as relatively easy entry and closure, this may indicate that there is a loose layer of soil, such as a layer of gravel or sand.

Ist das Eindringen oder Schließen erschwert, kann dies als ein Hinweis darauf gewertet werden, dass eine festere Bodenschicht oder gar ein Hindernis an der Schlitzsohle gegeben ist.If penetration or closing is difficult, this can be interpreted as an indication that there is a firmer soil layer or even an obstacle at the bottom of the trench.

Gemäß einem weiteren Aspekt der Erfindung ist eine Steuereinheit vorgesehen, welche mit der Messeinrichtung in Verbindung steht und die ermittelten Messwerte auswertet. Die Steuereinheit kann dabei auf Grundlage der Messwerte eine Aussage über das Bodenmaterial treffen. Dabei können der Steuereinheit zusätzlich weitere Messwerte von anderen Komponenten der Schlitzwandgreifvorrichtung, die z. B. eine Aussage über die aktuelle Höhenlage des Schlitzwandgreifers erlauben, übermittelt werden.According to a further aspect of the invention, a control unit is provided which is connected to the measuring device and evaluates the measured values determined. The control unit can make a statement about the soil material on the basis of the measured values. In this case, the control unit can also receive further measured values from other components of the diaphragm wall gripping device, which e.g. B. allow a statement about the current altitude of the diaphragm wall grab can be transmitted.

Mit diesen Informationen wird es für einen Bediener eines Schlitzwandgreifers erheblich vereinfacht, einen effektiven Betrieb vorzusehen. So kann etwa eine Fallhöhe mit dem Schlitzwandgreifer und damit eine Kraft zum Einbringen des Schlitzwandgreifers in den Boden eingestellt werden. Etwa durch einen Vergleich mit Daten eines vorangegangenen Greifervorgangs kann auch frühzeitig erkannt werden, wenn eine Felsschicht oder ein Hindernis vorliegt. In diesem Fall kann dann auf Grundlage der vorliegenden Informationen zum anstehenden Boden entschieden werden, ob gegebenenfalls der zumindest zeitweise Einsatz eines anderen Bodenabtragswerkzeuges, etwa eines Schlitzwandmeißels zum Zertrümmern von Felsgestein, für einen weiteren effektiven Vortrieb des Schlitzes sinnvoll ist.With this information, it is greatly simplified for a trench wall grab operator to schedule an effective operation. For example, a drop height with the diaphragm wall grab and thus a force for inserting the diaphragm wall grab into the ground can be set. A comparison with data from a previous grab operation can also be used to identify at an early stage if there is a layer of rock or an obstacle. In this case, based on the available information on the in-situ soil, a decision can then be made as to whether the at least temporary use of another soil removal tool, such as a diaphragm wall bit for breaking up rock, makes sense for further effective excavation of the trench.

Erfindungsgemäß umfasst die Steuereinheit eine Datenbank, in welcher zu bestimmten Bodenarten bekannte Messwerte hinterlegt sind. Anhand eines festgestellten Eindringweges oder einer Schließgeschwindigkeit oder eines Kraftaufwandes, welcher durch die Messeinrichtung erfasst wird, kann durch die Steuereinheit anhand der hinterlegten Daten unmittelbar eine Aussage zu der Bodenart, etwa Sand, Kies, Ton, Fels erfolgen.According to the invention, the control unit includes a database in which measured values known for specific soil types are stored. Based on a determined penetration path or a closing speed or an expenditure of force, which is recorded by the measuring device, the control unit can use the stored data to make a direct statement about the type of soil, such as sand, gravel, clay, rock.

Nach einer Weiterbildung des erfindungsgemäßen Schlitzwandgreifers ist es vorteilhaft, dass die Messeinrichtung ausgebildet ist, einen Verlauf der Messwerte über die Zeit und/oder über eine aktuelle Tiefe des Schlitzes zu erfassen. Hierdurch können zusätzliche Informationen zum Bodenaufbau oder zum Vorliegen eines Hindernisses erfasst werden. Beispielsweise kann so festgestellt werden, dass eventuell eine obere Schicht mit lockerem Bodenmaterial gegeben ist, während unmittelbar darunter eine Bodenschicht mit festerem Bodenmaterial vorliegt. Gleiches gilt für eine umgekehrte Bodenschichtung. Auch diese Information kann für den nachfolgenden Greifschritt und/oder beim Greifen von angrenzenden Schlitzen eingesetzt werden, um das Aushubverfahren möglichst effektiv zu gestalten.According to a development of the trench wall grab according to the invention, it is advantageous that the measuring device is designed to record a progression of the measured values over time and/or over a current depth of the trench. This allows additional information on the ground structure or the presence of an obstacle can be recorded. For example, it can be determined in this way that there may be an upper layer with loose soil material, while a soil layer with firmer soil material is present directly underneath. The same applies to reverse soil stratification. This information can also be used for the subsequent grabbing step and/or when grabbing adjacent slots to make the excavation process as efficient as possible.

Gemäß einer besonderen Ausführungsvariante der Erfindung ist es vorteilhaft, dass durch die Steuereinheit anzeigbar ist, dass von den Greiferschaufeln ein Hindernis, insbesondere ein Findling, gegriffen ist. Dies kann insbesondere dadurch festgestellt werden, dass die Greiferschaufeln nicht oder nicht vollständig geschlossen werden können. Das Vorliegen eines Findlings oder eines sonstigen Hindernisses kann eine Abänderung oder gar ein Unterbrechen des Verfahrens erfordern, so etwa den Einsatz einer anderen Bodenabtragseinrichtung. Auch kann der Schlitzwandgreifer zum Zertrümmern des Hindernisses mit geöffneten Greiferschaufeln aus einer größeren Höhe fallen gelassen werden.According to a special embodiment variant of the invention, it is advantageous that the control unit can indicate that an obstacle, in particular a boulder, has been gripped by the gripper shovels. This can be determined in particular by the fact that the grab shovels cannot be closed or cannot be closed completely. The presence of a boulder or other obstacle may require a modification or even an interruption of the process, such as the use of a different soil removal device. The diaphragm wall grab can also be dropped from a greater height with the grab buckets open to smash the obstacle.

Die Messeinrichtung ist mit entsprechenden Sensoren, so etwa Wegaufnehmern oder Drucksensoren, versehen. Dabei ist es nach einer Ausführungsform der Erfindung besonders zweckmäßig, dass die Messwerte für jede Greiferschaufel einzeln erfassbar sind. So kann etwa ein unsymmetrisches Schließen der Greiferschaufeln ermittelt werden. Dabei ist es besonders vorteilhaft, dass durch die Steuereinheit eine Angabe zur Größe und zur Lage des Hindernisses im Schlitzes ermittelbar ist. Informationen zur Größe und zur Lage des Hindernisses im Schlitz sind zu dessen Beseitigung hilfreich.The measuring device is equipped with appropriate sensors, such as displacement sensors or pressure sensors. According to one embodiment of the invention, it is particularly expedient that the measured values can be recorded individually for each grab shovel. For example, an asymmetrical closing of the grab buckets can be determined. It is particularly advantageous that the control unit can determine the size and position of the obstacle in the slot. Information about the size and location of the obstruction in the slot is helpful in removing it.

Grundsätzlich können die Greiferschaufeln in einer beliebigen Weise durch entsprechende Aktoren betätigt werden. Dies kann auch eine Betätigung durch Betätigungsseile sein. Besonders bevorzugt ist es nach einer Weiterbildung der Erfindung, dass die Betätigungseinrichtung mindestens einen Betätigungszylinder aufweist. Dies können ein zentraler Betätigungszylinder für beide Greiferschaufeln oder jeweils einer oder mehrere Betätigungszylinder für jede Greiferschaufel sein. Die Betätigungszylinder werden insbesondere hydraulisch betrieben.In principle, the gripper shovels can be actuated in any way by appropriate actuators. This can also be an actuation by actuating cables. According to a development of the invention, it is particularly preferred that the actuating device has at least one actuating cylinder. This can be a central actuating cylinder for both grab shovels or one or more actuating cylinders for each grab shovel. In particular, the actuating cylinders are operated hydraulically.

Die Messeinrichtung, welche mehrere Sensoren oder Messaufnehmer umfassen kann, kann an einer beliebigen Stelle oder an mehreren Stellen des Schlitzwandgreifers angeordnet sein.The measuring device, which can include a number of sensors or measuring transducers, can be arranged at any point or at a number of points on the trench wall grab.

Besonders zweckmäßig ist es nach einer Weiterbildung der Erfindung, dass die Messeinrichtung an dem mindestens einen Betätigungszylinder angeordnet ist. Hier kann insbesondere ein Druck im Betätigungszylinder als Maß für den notwendigen Kraftaufwand und/oder ein Stellweg eines Kolbens im Betätigungszylinder erfasst werden. Der Stellweg liefert dabei eine Aussage über das Schließen und die Position der Greiferschaufeln.According to a development of the invention, it is particularly expedient for the measuring device to be arranged on the at least one actuating cylinder. Here, in particular, a pressure in the actuating cylinder can be recorded as a measure of the necessary expenditure of force and/or a travel of a piston in the actuating cylinder. The travel provides information about the closing and the position of the grab shovels.

Eine bevorzugte Ausführungsform der Erfindung besteht darin, dass die Greiferschaufeln an Schwenkbolzen schwenkbar gelagert sind, dass Sensoren der Messeinrichtung an den Schwenkbolzen vorgesehen sind und dass die Sensoren zum Erfassen von Kräften und/oder eines Schwenkwinkels der Greiferschaufeln ausgebildet sind. Die Sensoren können insbesondere Kraftmesssensoren und/oder Sensoren zur Aufnahme einer Stellposition oder des Stellwinkels der Greiferschaufeln sein. Mit diesen Werten kann insbesondere eine Aussage darüber getroffen werden, ob eine asymmetrische Belastung oder Öffnung der Greiferschaufeln gegeben ist. Dies lässt wiederum Rückschlüsse auf eine Form und Anordnung eines Hindernisses, insbesondere eines Findlings zu.A preferred embodiment of the invention consists in that the gripper shovels are pivotably mounted on pivot bolts, that sensors of the measuring device are provided on the pivot bolts and that the sensors are designed to detect forces and/or a pivot angle of the gripper shovels. In particular, the sensors can be force measurement sensors and/or sensors for recording a setting position or the setting angle of the gripper shovels. With these values, a statement can be made as to whether there is an asymmetrical loading or opening of the grab shovels. This in turn allows conclusions to be drawn about the shape and arrangement of an obstacle, in particular a boulder.

Die Erfindung umfasst weiterhin eine Schlitzwandgreifvorrichtung mit einem Schlitzwandgreifer, der nach der zuvor beschriebenen Erfindung ausgebildet ist. Dabei ist es vorgesehen, dass der Schlitzwandgreifer an einer Trägervorrichtung vertikal verstellbar gelagert ist. Die Trägervorrichtung kann insbesondere einen fahrbaren Unterwagen, vorzugsweise ein Raupenfahrwerk und einen daran vorzugsweise drehbaren Oberwagen umfassen. An dem Oberwagen ist vorzugsweise ein Mast angeordnet, entlang welchem ein Schlitzwandgreifer mittels einer Seilaufhängung oder einer starren Betätigungsstange vertikal verstellbar gelagert ist.The invention further comprises a trench wall gripping device with a trench wall gripper which is designed according to the invention described above. It is provided that the slurry wall grab is mounted on a carrier device so that it can be adjusted vertically. The carrier device can in particular comprise a mobile undercarriage, preferably a crawler chassis and an upper carriage which can preferably be rotated thereon. A mast is preferably arranged on the superstructure, along which a diaphragm wall grab is mounted so that it can be adjusted vertically by means of a cable suspension or a rigid actuating rod.

Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass mittels einer Messeinrichtung ein Weg und/oder ein Druck bei einem Schließen der Greiferschaufein ermittelt wird und dass die Messeinrichtung ermittelte Messwerte an eine Steuereinheit weiterleitet, welche ausgebildet ist, auf Grundlage der von der Messeinrichtung ermittelten Messwerte eine Aussage über das Bodenmaterial zu treffen.The method according to the invention is characterized in that by means of a measuring device, a path and/or a pressure when the gripper blades are closed is determined and that the measuring device forwards determined measured values to a control unit, which is designed to make a statement about the soil material on the basis of the measured values determined by the measuring device.

Das erfindungsgemäße Verfahren kann insbesondere mit dem zuvor beschriebenen Schlitzwandgreifer durchgeführt werden. Es können dabei die zuvor beschriebenen Vorteile erzielt werden.The method according to the invention can be carried out in particular with the slurry wall grab described above. The advantages described above can be achieved in this way.

Eine bevorzugte Verfahrensvariante der Erfindung besteht darin, dass der Schlitz beim Erstellen oder anschließend mit einer Suspension verfüllt wird und dass die Suspension in dem Schlitz aushärtet und ein Schlitzwandsegment hergestellt wird. Durch eine entsprechende wiederholende Herstellung eines angrenzenden oder sich überlappenden Schlitzwandsegmentes kann so eine Schlitzwand hergestellt werden. Die Schlitzwand kann insbesondere als eine Stütz- und/oder Abdichtwand dienen.A preferred method variant of the invention consists in that the slot is filled with a suspension when it is made or subsequently, and that the suspension hardens in the slot and a slot wall segment is produced. Such a diaphragm wall can be produced by a corresponding repeated production of an adjoining or overlapping diaphragm wall segment. The slit wall can in particular serve as a supporting and/or sealing wall.

Die Erfindung wird nachfolgend anhand von bevorzugten Ausführungsbeispielen beschrieben, welche schematisch in den Zeichnungen dargestellt sind.The invention is described below with reference to preferred exemplary embodiments, which are shown schematically in the drawings.

In den Zeichnungen zeigen:

Fig. 1
eine Seitenansicht einer erfindungsgemäßen Schlitzwandgreifvorrichtung und
Fig. 2
eine Teilquerschnittsansicht eines erfindungsgemäßen Schlitzwandgreifers.
In the drawings show:
1
a side view of a diaphragm wall gripping device according to the invention and
2
a partial cross-sectional view of a trench wall grab according to the invention.

Gemäß Fig. 1 umfasst eine erfindungsgemäße Schlitzwandgreifvorrichtung 10 ein Trägergerät 12 mit einem daran angehängten Schlitzwandgreifer 20. Das Trägergerät 12 weist in grundsätzlich bekannter Weise ein Raupenfahrwerk 11 und einen darauf drehbar gelagerten Oberwagen 13 auf. An dem Oberwagen 13 ist ein etwa vertikal gerichteter Mast 14 mit einem Mastkopf 15 angelenkt. Über ein Tragseil 16 ist der Schlitzwandgreifer 20 vertikal verstellbar an dem Trägergerät 12 mit dem Mast 14 angehängt. Über eine Versorgungsleitung 18 wird Hydraulikenergie zugeführt. Weiter kann eine Zuleitung für Strom und Daten bereitgestellt werden.According to 1 a diaphragm wall gripping device 10 according to the invention comprises a carrier device 12 with a diaphragm wall gripper 20 attached thereto. An approximately vertically directed mast 14 with a mast head 15 is articulated on the superstructure 13 . The slurry wall grab 20 is attached to the carrier device 12 with the mast 14 in a vertically adjustable manner via a carrying cable 16 . Hydraulic energy is supplied via a supply line 18 . A supply line for power and data can also be provided.

Der Schlitzwandgreifer 20 weist einen kastenförmigen Greiferrahmen 22 auf. An seiner Oberseite ist eine Halteinrichtung 40 angeordnet, an welcher ein Ende des Tragseiles 16 angebracht ist. An einem unteren Ende des Greiferrahmens 22 sind die Greiferschaufeln 24 gelagert. Entlang des Greiferrahmens 22 sind plattenförmige Führungselemente 26 zur Lagesteuerung verstellbar gelagert.The trench wall grab 20 has a box-shaped grab frame 22 . A holding device 40 is arranged on its upper side, on which one end of the carrying cable 16 is attached. At a lower end of the gripper frame 22, the gripper scoops 24 are mounted. Plate-shaped guide elements 26 are adjustably mounted along the gripper frame 22 for position control.

In Fig. 2 ist der Aufbau eines Schlitzwandgreifers 20 näher dargestellt. In einem Mittenbereich des gerüstartig aufgebauten Greiferrahmens 22 ist eine Betätigungseinrichtung 30 für die unteren Greiferschaufeln 24 angeordnet. Die Betätigungseinrichtung 30 umfasst einen hydraulisch antreibbaren Betätigungszylinder 32, in welchem eine Kolbenstange 34 nach unten ausfahrbar gelagert ist. Der hydraulische Betätigungszylinder 32 wird über die Versorgungsleitung 18 (in Fig. 2 nicht dargestellt) von dem Trägergerät 12 mit hydraulischer Energie versorgt.In 2 the structure of a trench wall grab 20 is shown in more detail. An actuating device 30 for the lower gripper shovels 24 is arranged in a central area of the gripper frame 22, which is constructed like a scaffold. The actuating device 30 comprises a hydraulically drivable actuating cylinder 32 in which a piston rod 34 is mounted so that it can be extended downwards. The hydraulic actuating cylinder 32 is operated via the supply line 18 (in 2 not shown) supplied by the carrier device 12 with hydraulic energy.

Ein unteres Ende des Kolbenstange 34 ist an einem Schlittenelement 36 angelenkt, welches linear verfahrbar längs des Greiferrahmens 22 geführt ist. An dem Schlittenelement 36 sind zwei Hebel 38 angelenkt, wobei jeder Hebel 38 mit einer Greiferschaufeln 24 gelenkig verbunden ist. Die Greiferschaufeln 24 selbst sind gelenkig an einem unteren Ende des Greiferrahmens 22 gelagert.A lower end of the piston rod 34 is linked to a carriage element 36 which is guided in a linearly displaceable manner along the gripper frame 22 . Two levers 38 are articulated on the carriage element 36, each lever 38 being connected in an articulated manner to a gripper blade 24. The grab scoops 24 themselves are articulated at a lower end of the grab frame 22 .

Durch ein Einfahren der Kolbenstange 34 in den Betätigungszylinder 32 wird das Schlittenelement 36 nach oben gefahren, wobei über die Hebel 38 die Greiferschaufeln 24 in eine Öffnungsposition zum Aufnehmen von Bodenmaterial bewegt werden. Durch ein Ausfahren der Kolbenstange 34 nach unten wird das Schlittenelement 36 entlang der Linearführung nach unten bewegt, wobei die Hebel 38 die Greiferschaufeln 24 in eine Schließposition drücken, in welcher ein gegriffenes Bodenmaterial zwischen den Greiferschaufeln 24 eingeschlossen ist.By retracting the piston rod 34 into the actuating cylinder 32, the carriage element 36 is moved upwards, the grab shovels 24 being moved via the lever 38 into an open position for picking up soil material. By extending the piston rod 34 downwards, the carriage element 36 is moved downwards along the linear guide, with the levers 38 pressing the gripper scoops 24 into a closed position in which a gripped soil material is enclosed between the gripper scoops 24 .

Gemäß der Erfindung ist eine in den Figuren nicht näher dargestellte Messeinrichtung vorgesehen, welche insbesondere an der Betätigungseinrichtung 30 und vorzugsweise an dem Betätigungszylinder 32 angeordnet ist. Die Messeinrichtung ist zum Ermitteln eines Ausfahrweges der Kolbenstange 34 und eines Drucks in dem Betätigungszylinder 32 beim Schließen der Greiferschaufeln 24 ausgebildet. Hierdurch kann ermittelt werden, wenn die Greiferschaufeln 24 beim Schließen ein Hindernis 8, etwa einen Felsen, greifen. In diesem Fall ist durch die Messeinrichtung feststellbar, dass sich trotz eines Druckanstieges in dem zweiseitig wirkenden Betätigungszylinder 32 ein Verfahrweg der Kolbenstange 34 und damit des Schlittenelementes 36 nicht mehr ändert. Dieser Zustand, welcher von der Messeinrichtung erfasst werden kann, kann von einer Steuereinheit, welche ebenfalls nicht dargestellt ist, als ein Anzeichen für das Vorliegen eines Hindernisses genutzt werden.According to the invention, a measuring device not shown in detail in the figures is provided, which is arranged in particular on the actuating device 30 and preferably on the actuating cylinder 32 . The measuring device is designed to determine an extension path of the piston rod 34 and a pressure in the actuating cylinder 32 when the grab shovels 24 are closed. This makes it possible to determine when the gripper shovels 24 grip an obstacle 8, such as a rock, when closing. In this case, the measuring device can be used to determine that, despite an increase in pressure in the actuating cylinder 32 acting on both sides, a displacement path of the piston rod 34 and thus of the carriage element 36 is no longer possible changes. This state, which can be detected by the measuring device, can be used by a control unit, which is also not shown, as an indication of the presence of an obstacle.

Die Steuereinheit kann dabei vorzugsweise an dem Trägergerät 12 angeordnet sein. Über die Versorgungsleitung 18 oder über eine drahtlose Verbindung können die von der Messeinrichtung ermittelten Messwerte an die Steuereinheit geleitet werden. Die Steuereinheit kann dann auf Grundlage der erhaltenen Messwerte eine Aussage über das Vorliegen eines Hindernisses oder auch über das anstehende Bodenmaterial treffen. Die so ermittelte Information kann z. B. über einen Monitor einem Bediener im Oberwagen 13 des Trägergerätes 12 oder einer beabstandeten Zentrale mitgeteilt werden.The control unit can preferably be arranged on the carrier device 12 . The measured values determined by the measuring device can be sent to the control unit via the supply line 18 or via a wireless connection. Based on the measured values obtained, the control unit can then make a statement about the presence of an obstacle or also about the existing ground material. The information determined in this way can e.g. B. be communicated via a monitor to an operator in the superstructure 13 of the carrier device 12 or a distant center.

Aufgrund eines Öffnungswinkels der Greiferschaufeln 24 beim Erfassen eines Hindernisses 8 kann von der Steuereinheit auch eine Aussage über die Größe des Hindernisses 8 getroffen werden.Based on an opening angle of the gripper shovels 24 when an obstacle 8 is detected, the control unit can also make a statement about the size of the obstacle 8 .

Werden die Greiferschaufeln 24 z. B. von separaten Betätigungszylindern 32 betätigt, so kann detektiert werden, wenn die Greiferschaufeln 24 unterschiedlich weit schließen können. Daraus kann von der Steuereinheit zusätzlich auch eine Aussage über die Lage des Hindernisses getroffen werden.If the grab buckets 24 z. B. actuated by separate actuating cylinders 32, it can be detected when the gripper shovels 24 can close to different extents. From this, the control unit can also make a statement about the position of the obstacle.

Claims (11)

  1. Trench wall grab for producing a trench in the ground, having:
    - a grab frame (22),
    - grab buckets (24) which are mounted thereon and, for grabbing ground material, are adjustable between an open position and a closed position, in which ground material is held, and
    - an actuating device (30) which is configured to adjust the grab buckets (24) between the open position and the closed position,
    wherein
    there is provided a measuring device which is configured to determine a displacement and/or pressure on closing of the grab buckets (24),
    wherein, for transmitting determined measured values, the measuring device communicates with a control unit which is configured to provide information about the ground material on the basis of the measured values determined by the measuring device, and
    wherein the control unit comprises a database in which known measured values for specific types of ground are stored.
  2. Trench wall grab according to claim 1,
    characterised in that
    the measuring device is configured to detect a change in the measured values over time and/or a current depth of the trench.
  3. Trench wall grab according to either claim 1 or claim 2,
    characterised in that
    the control unit is able to show that the grab buckets (24) have hit an obstacle (8), in particular a boulder.
  4. Trench wall grab according to any one of claims 1 to 3,
    characterised in that
    the measured values can be detected individually for each grab bucket (24).
  5. Trench wall grab according to claim 3 or 4,
    characterised in that
    an indication of the size and/or position of the obstacle (8) in the trench can be determined by the control unit.
  6. Trench wall grab according to any one of claims 1 to 5,
    characterised in that
    the actuating device (30) has at least one actuating cylinder (32).
  7. Trench wall grab according to claim 6,
    characterised in that
    the measuring device is arranged on the at least one actuating cylinder (32).
  8. Trench wall grab according to any one of claims 1 to 7,
    characterised in that
    the grab buckets (24) are pivotably mounted on pivot pins,
    in that sensors of the measuring device are provided on the pivot pins, and
    in that the sensors are configured to detect forces and/or a pivot angle of the grab buckets (24).
  9. Trench wall grab apparatus having a trench wall grab (20) according to any one of claims 1 to 8,
    characterised in that
    the trench wall grab (20) is mounted on a support device (12) so as to be vertically adjustable.
  10. Method for producing a trench in the ground, in particular using a trench wall grab (20) according to any one of claims 1 to 8 or a trench wall grab apparatus (10) according to claim 9,
    wherein there is used a trench wall grab (20) which has a grab frame (22) at the lower end of which there are arranged two grab buckets (24) which are adjustable by means of an actuating device (30) between an open position and a closed position, wherein the grab buckets (24) grab ground material and hold it in the closed position,
    - wherein a displacement and/or a pressure on closing of the grab buckets (24) is determined by means of a measuring device, and
    - wherein the measuring device transmits determined measured values to a control unit having a database in which known measured values for specific types of ground are stored, which control unit is configured to provide information about the ground material on the basis of the measured values determined by the measuring device.
  11. Method according to claim 10,
    characterised in that
    the trench is filled with a suspension while it is being produced or thereafter, and in that the suspension hardens in the trench and a trench wall segment is produced.
EP19170133.3A 2019-04-18 2019-04-18 Slotted wall gripper and method for creating a slot in the ground Active EP3725950B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES19170133T ES2929747T3 (en) 2019-04-18 2019-04-18 Diaphragm wall spoon and procedure for making a trench in the ground
EP19170133.3A EP3725950B1 (en) 2019-04-18 2019-04-18 Slotted wall gripper and method for creating a slot in the ground
CN202010306146.4A CN111827385B (en) 2019-04-18 2020-04-17 A trench wall gripper and a method for creating a trench in the ground

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CN113463607A (en) * 2021-05-27 2021-10-01 诚业工程科技集团有限公司 Construction method for controlling flatness precision of large-area building ground
CN117800211B (en) * 2024-02-28 2024-06-11 山东海盛海洋工程集团有限公司 Hydraulic grab bucket for underwater obstacle clearing

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EP3299523A1 (en) 2016-09-21 2018-03-28 BAUER Spezialtiefbau GmbH Method and construction devicefor soil cultivation
EP3401444A1 (en) 2017-05-11 2018-11-14 BAUER Maschinen GmbH Underground diaphragm and method for creating a slit in the ground

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KLAUS F. HUDELMAIER, HARTMUT KÜFNER: "SPEZIALTIEFBAU, KOMPENDIUM BAND II VERFAHRENSTECHNIK UND GERÄTEAUSWAHL BOHRGERÄTE UND HYDROSE I LBAGGER", 1 January 2009, LIEBHERR-WERK NENZING GMBH, article KLAUS F. HUDELMAIER: "Schlitzwandherstellung im Greiferverfahren ", pages: 1 - 2, XP093158344

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CN111827385B (en) 2022-10-18
EP3725950A1 (en) 2020-10-21
CN111827385A (en) 2020-10-27
ES2929747T3 (en) 2022-12-01

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