EP0690943B1 - Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain - Google Patents

Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain Download PDF

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Publication number
EP0690943B1
EP0690943B1 EP94909118A EP94909118A EP0690943B1 EP 0690943 B1 EP0690943 B1 EP 0690943B1 EP 94909118 A EP94909118 A EP 94909118A EP 94909118 A EP94909118 A EP 94909118A EP 0690943 B1 EP0690943 B1 EP 0690943B1
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EP
European Patent Office
Prior art keywords
diaphragm wall
guide body
inner body
grab
vertical
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EP94909118A
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German (de)
French (fr)
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EP0690943A1 (en
Inventor
Michael Leffer
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STAHL- und APPARATEBAU HANS LEFFER GmbH
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STAHL- und APPARATEBAU HANS LEFFER GmbH
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    • 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
    • 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
    • E02F3/46—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
    • E02F5/14—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids
    • E02F5/145—Component parts for trench excavators, e.g. indicating devices travelling gear chassis, supports, skids control and indicating devices

Definitions

  • the invention relates to a method and a device for precisely maintaining the vertical direction of excavation of a diaphragm wall using a hydraulic diaphragm wall gripper that interacts with an excavator and has an outer guide body and an inner body that receives the gripper device.
  • Diaphragm and sealing walls have become an important part of the basic structure.
  • a diaphragm wall is usually produced in individual segments. Their depth is not strictly limited in principle, but at greater depths there is a risk of “running” of diaphragm wall elements, wherein as a result of a deviation from the vertical target position in the lower wall area there are gap openings between the segments which impair the stability of the wall to be created.
  • diaphragm walls over 40 m deep requires special experience and measures during excavation, such as extensive measurements on the open slots. These are excavated without removal and therefore tend to deviate from the specified vertical direction in the case of inhomogeneous soil material.
  • the usual width dimensions of a diaphragm wall are 600-800 mm, but there are also widths of 400-1500 mm, depending on the depth and purpose of the diaphragm wall, during construction.
  • this process is time consuming and increases the construction costs, which is why the construction supervision strives to To keep diaphragm wall excavation as exactly as possible in the given direction.
  • the invention is based on the object of specifying a method and a device for precisely maintaining the vertical direction of excavation of a diaphragm wall with a diaphragm wall grab, which make it possible primarily to immediately detect a deviation from the predetermined direction of excavation, to display this at the control center of the diaphragm wall grab operation and secondly by means of a To compensate for the change in direction of the gripper.
  • One embodiment provides that a case-by-case angular deviation from the vertical is combined with a depth measuring device assigned to the diaphragm wall gripper, an assignment of the deviation and depth of the diaphragm wall is calculated therefrom and this is signaled to the control center of the diaphragm wall gripper operation.
  • a depth measuring device is assigned to the diaphragm wall gripper and means are provided with which the display of the position detector and the display of the depth measuring device can be assigned to one another.
  • the excavator operator operating the diaphragm wall grab can recognize at any time whether the diaphragm wall in the excavation is within the specified positional tolerances at the depth reached, and whether and which corrections are necessary.
  • a further embodiment provides that the swiveling device and the control device controlling it are assigned means for a higher-level manual control intervention from the excavator control center, with the aid of which a directional correction of the gripper is possible in accordance with the display of the detector.
  • a hydraulic piston / cylinder unit is articulated, which is also pivotally mounted on the frame lever assembly is in operative connection with a cam which can be moved back and forth, which engages in a U-shaped guide of the inner body and pivots this according to the position of the cam relative to the guide body from the orthogonal position into a different pivot position according to a correction angle.
  • the diaphragm wall gripper shown in FIG. 1 has a guide body 11 formed by an outer frame 12. An inner body 10 with gripper blades 1 and hydraulic actuating device 2 articulated thereon is arranged in this.
  • the inner body 10 is pivotally articulated in the guide body 11 by means of horizontal bearing pins 20 arranged in the direction of the diaphragm wall 40 transversely to the vertical course of the diaphragm wall 40.
  • Hydraulic pivoting means 30 are provided between the guide body 11 and the inner body 10.
  • detectors 25 for monitoring the vertical position of these bodies are arranged on the inner body 10 and / or on the guide body 11.
  • the detector (s) 25 are in constant operation via a signal line with a control device controlled by them for actuating the pivoting means 30.
  • a depth measuring device can be assigned to the diaphragm wall gripper (not shown), means being provided with which the display of the position detector 25 and the display of the depth measuring device can be assigned to one another. Furthermore, use can be made very advantageously of the measure that the means 30 for pivoting the inner body 10 or the control device which controls them are assigned further means for a higher-level manual control intervention from the excavator control station (not shown), with the aid of which a position correction of the inner body is associated 10 relative to the guide body 11 is possible in accordance with the position indicator of the position detector 25.
  • a piston / cylinder unit 30 is articulated, which has a lever joint arrangement 32 which is also pivotably mounted on the frame 12 and which has reciprocating pivoting movements thereon removable cams 33 is in operative connection.
  • This engages in a U-shaped guide 34 of the inner body 10 and pivots this in accordance with the position of the cam 33 relative to the guide body 11 from the orthogonal position shown in FIGS. 2 and 6 into a different pivot position corresponding to the correction angle ⁇ in the figures 3 and 4.
  • the diaphragm wall gripper hangs with its guide body 11 in a rope suspension 3.
  • the gripper according to FIG. 5 is a comparatively heavier version with a reinforced frame 12 of the outer guide body 11.
  • the inner body 10 is pivotally mounted therein in the bearing pin 20 transversely to the slot direction.
  • the hydraulic cylinders 30 are arranged differently from the hanging arrangement according to FIGS. 1-4. It is a purely manual measure at the designer's discretion. Otherwise, the two designs according to FIG. 1 and FIG. 5 are functionally the same.
  • the gripper inner body 10 is preferably formed with the angle measuring device 25 and the display of the deviation can be combined with a depth measuring device, so that the deviation can also be assigned to the corresponding slot depth and displayed on the control center.
  • the adjustment via the lever system 32 is extremely uncomplicated, requires hardly any maintenance in practice and works with great accuracy.
  • the adjusting members 30 can consist of a cylinder body with a central cylinder base, from which two piston rods can be extended independently of one another, one of which is articulated on the outer body 11 of the gripper and the other on the inner body 10 of the gripper. As FIGS. 3 and 4 show, when the piston rods are extended on both sides according to FIG. 3, they can be pivoted in one direction up to the angle ⁇ and when the piston rods are retracted on both sides, they can be pivoted in the opposite direction up to the angle ⁇ .
  • the hydraulic control of the adjusting cylinders can be designed in such a way that both an infinitely variable adjustment in both directions and a defined middle position or neutral position can be controlled as desired by the operator.
  • the hydraulic diaphragm wall gripper With its articulated arrangement, the hydraulic diaphragm wall gripper according to the invention is a very uncomplicated and robust device and enables the direction of advance of the gripper blades to be corrected either fully automatically or manually.
  • the invention ideally fulfills the task set out above.

Abstract

PCT No. PCT/EP94/00671 Sec. 371 Date Nov. 8, 1995 Sec. 102(e) Date Nov. 8, 1995 PCT Filed Mar. 7, 1994 PCT Pub. No. WO94/21864 PCT Pub. Date Sep. 29, 1994A process for exactly holding the vertical excavation direction of a diaphragm wall using a hydraulic diaphragm wall grab cooperating with an excavator and having an outer guide body and an inner body for receiving the grab appliance is improved and rendered considerably more efficient by the fact that the vertical position of the inner body and/or the guide body is continuously controlled by means of an inclination detector whose-signals are transferred to a controller which, in case the bodies of the grab deviate from the predetermined vertical position, compensates said deviation by swivelling the inner body relative to the guide body in opposite direction to the deviation.

Description

Die Erfindung betrifft ein Verfahren sowie eine Vorrichtung zum exakten Einhalten der vertikalen Aushubrichtung einer Schlitzwand unter Verwendung eines mit einem Bagger zusammenwirkenden, hydraulischen Schlitzwandgreifers mit einem äußeren Führungskörper und einem die Greifervorrichtung aufnehmenden Innenkörper.
Schlitz- und Dichtwände sind zu einem wichtigen Bestandteil im Grundbau geworden. Üblicherweise wird eine Schlitzwand in einzelnen Segmenten hergestellt. Ihre Tiefe ist grundsätzlich nicht fest begrenzt, doch ergibt sich bei größeren Tiefen die Gefahr des "Verlaufens" von Schlitzwandelementen, wobei infolge Abweichung von der lotrechten Sollage im unteren Wandbereich Spaltöffnungen zwischen den Segmenten entstehen, welche die Stabilität der zu erstellenden Wand beeinträchtigen. Die Erstellung von Schlitzwänden über 40 m Tiefe erfordert besondere Erfahrungen und Maßnahmen beim Aushub, wie beispielsweise umfangreiche Messungen an den offenen Schlitzen. Diese werden ohne Ausbau ausgehoben und neigen daher bei inhomogenem Bodenmaterial zur Abweichung von der vorgegebenen lotrechten Richtung.
Gebräuchliche Breitenabmessungen einer Schlitzwand betragen 600-800 mm, es sind aber auch Breiten von 400-1500 mm, je nach Tiefe und Zweck der Schlitzwand, beim Bau anzutreffen. Im Falle einer Abweichung aus der vorgegebenen vertikalen Richtung eines Schlitzwandsegmentes ergibt sich die Notwendigkeit, die Wände mit Profilmeißeln nachzuschneiden, um eine einwandfreie Senkrechtstellung der Wand zu erreichen. Dieses Verfahren ist jedoch zeitraubend, und erhöht die Baukosten, weswegen die Bauaufsicht bestrebt ist, den Schlitzwandaushub möglichst exakt in der vorgegebenen Richtung zu halten.The invention relates to a method and a device for precisely maintaining the vertical direction of excavation of a diaphragm wall using a hydraulic diaphragm wall gripper that interacts with an excavator and has an outer guide body and an inner body that receives the gripper device.
Diaphragm and sealing walls have become an important part of the basic structure. A diaphragm wall is usually produced in individual segments. Their depth is not strictly limited in principle, but at greater depths there is a risk of “running” of diaphragm wall elements, wherein as a result of a deviation from the vertical target position in the lower wall area there are gap openings between the segments which impair the stability of the wall to be created. The creation of diaphragm walls over 40 m deep requires special experience and measures during excavation, such as extensive measurements on the open slots. These are excavated without removal and therefore tend to deviate from the specified vertical direction in the case of inhomogeneous soil material.
The usual width dimensions of a diaphragm wall are 600-800 mm, but there are also widths of 400-1500 mm, depending on the depth and purpose of the diaphragm wall, during construction. In the event of a deviation from the specified vertical direction of a diaphragm wall segment, it is necessary to cut the walls with profile chisels in order to achieve a perfect vertical position of the wall. However, this process is time consuming and increases the construction costs, which is why the construction supervision strives to To keep diaphragm wall excavation as exactly as possible in the given direction.

Beim Stand der Technik ist es bekannt, Schlitzwandgreifer mit sogenannten Steuerplatten, die am Grundrahmen angebracht sind, auszurüsten. Eine solche Anordnung ist beispielsweise aus dem Sonderdruck 66 der Salzgitter Maschinen AG in dem Aufsatz "Anbaugeräte für Bagger", Spezialeinrichtungen für Bohr- und Bauarbeiten von Dr.-Ing. Hans Bartholmai, beschrieben und auf Seite 6, Bild 15 gezeigt. Diese Ausrüstung ist geeignet, die vertikale Lage beim Aushub einer Schlitzwand zu stabilisieren, nicht aber eine einmal eingetretene Abweichung aus der vorgegebenen Arbeitsrichtung zu kompensieren.
Der Oberbegriff von Anspruch 1 ist aus der JP-A-324 111 8 abgeleitet.In the prior art it is known to equip diaphragm wall grippers with so-called control plates which are attached to the base frame. Such an arrangement is, for example, from the special print 66 of Salzgitter Maschinen AG in the article "Attachments for excavators", special equipment for drilling and construction work by Dr.-Ing. Hans Bartholmai, described and shown on page 6, picture 15. This equipment is suitable to stabilize the vertical position when excavating a diaphragm wall, but not to compensate for a deviation from the given direction of work.
The preamble of claim 1 is derived from JP-A-324 111 8.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum exakten Einhalten der vertikalen Aushubrichtung einer Schlitzwand mit einem Schlitzwandgreifer anzugeben, die es ermöglichen, primär eine Abweichung von der vorgegebenen Aushubrichtung unverzüglich zu erkennen, diese beim Leitstand der Schlitzwandgreiferbedienung anzuzeigen und sekundär mittels einer Richtungsänderung des Greifers zu kompensieren.The invention is based on the object of specifying a method and a device for precisely maintaining the vertical direction of excavation of a diaphragm wall with a diaphragm wall grab, which make it possible primarily to immediately detect a deviation from the predetermined direction of excavation, to display this at the control center of the diaphragm wall grab operation and secondly by means of a To compensate for the change in direction of the gripper.

Die Lösung der gestellten Aufgabe wird bei einem Verfahren entsprechend dem Oberbegriff von Anspruch 1 durch die im kennzeichnenden Teil angegebenen Massnahmen erreicht.The solution of the problem is achieved in a method according to the preamble of claim 1 by the measures specified in the characterizing part.

Mit dem Verfahren wird erstmals eine selbsttätige exakte Einhaltung der vertikalen Aushubrichtung einer Schlitzwand unter Verwendung eines hydraulischen Schlitzwandgreifers ermöglicht. Hierdurch wird ein zügiger Fortschritt beim Aushub einer Schlitzwand verwirklicht, indem das aufwendige und zeitraubende intermittierende Vermessen der ausgehobenen Schlitzwandpartie sowie eine Nacharbeit unterbleiben und ein ununterbrochen fortschreitender Aushub unter erheblicher Kostenersparnis durchgeführt werden kann.With the method, an automatic exact adherence to the vertical direction of excavation of a diaphragm wall is made possible for the first time using a hydraulic diaphragm wall gripper. As a result, rapid progress is made in excavating a diaphragm wall by eliminating the complex and time-consuming intermittent measurement of the excavated diaphragm wall section, as well as reworking, and continuously progressive excavation can be carried out at considerable cost savings.

Eine Ausgestaltung sieht vor, daß eine fallweise Winkelabweichung von der Vertikalen mit einer dem Schlitzwandgreifer zugeordneten Tiefenmeßeinrichtung kombiniert, daraus eine Zuordnung von Abweichung und Tiefe der Schlitzwand errechnet und diese an den Leitstand der Schlitzwandgreiferbedienung signalisiert wird.One embodiment provides that a case-by-case angular deviation from the vertical is combined with a depth measuring device assigned to the diaphragm wall gripper, an assignment of the deviation and depth of the diaphragm wall is calculated therefrom and this is signaled to the control center of the diaphragm wall gripper operation.

Eine Vorrichtung zum exakten Einhalten der vertikalen Aushubrichtung einer Schlitzwand unter Verwendung eines mit einem Bagger zusammenwirkenden hydraulischen Schlitzwandgreifers und eines diesem zugeordneten Führungskörpers, wobei dieser in der Breite der Greiferschaufeln ausgebildet ist und am Kopfende ein Geschirr zum Anhängen an eine Tragseilanordnung oder an ein Teleskopgestänge aufweist, ist nach der Erfindung durch die Merkmale gekennzeichnet: daß der Führungskörper einen äußeren Rahmen bildet, in welchem ein Innenkörper mit daran angelenkten Greiferschaufeln und hydraulischer Betätigungsvorrichtung angeordnet ist; daß der Innenkörper im Führungskörper mittels horizontaler, in Richtung der Schlitzwand angeordneter Lagerzapfen quer zum vertikalen Verlauf der Stützwand schwenkbar angelenkt ist;

  • daß zwischen dem Führungskörper und dem Innenkörper hydraulische Verschwenkungsmittel vorgesehen sind;
  • daß am Innenkörper und/oder am Führungskörper ein Detektor zum Überwachen der vertikalen Lage angeordnet ist und der Bagger eine vom Detektor beherrschte Regelvorrichtung zur Betätigung der Verschwenkungsmittel aufweist.
A device for precisely maintaining the vertical direction of excavation of a diaphragm wall using a hydraulic diaphragm wall gripper interacting with an excavator and a guide body assigned to it, the latter being designed in the width of the gripper blades and having a tableware at the head end for attaching to a suspension cable arrangement or to a telescopic rod. is characterized according to the invention by the features: that the guide body forms an outer frame in which an inner body is arranged with gripper blades articulated thereon and hydraulic actuating device; that the inner body in the guide body is pivotally articulated transversely to the vertical course of the support wall by means of horizontal bearing pins arranged in the direction of the diaphragm wall;
  • that hydraulic pivoting means are provided between the guide body and the inner body;
  • that a detector for monitoring the vertical position is arranged on the inner body and / or on the guide body and the excavator has a control device controlled by the detector for actuating the pivoting means.

Im Gegensatz zu der bekannten Führung der Greifereinrichtung durch starre Steuerplatten, kann durch die erfindungsgemäß neigungssteuerbare Ausgestaltung des Schlitzwandgreifers eine sehr exakte, feinfühlige und selbsttätige Vertikalsteuerung der Greifervorrichtung verwirklicht werden.In contrast to the known guiding of the gripper device by rigid control plates, a very exact, sensitive and automatic vertical control of the gripper device can be realized by the inventive inclination-controllable configuration of the diaphragm wall gripper.

Eine Ausgestaltung sieht vor, daß dem Schlitzwandgreifer eine Tiefenmeßeinrichtung zugeordnet ist und Mittel vorgesehen sind, mit welchen die Anzeige des Lagedetektors und die Anzeige der Tiefenmeßeinrichtung einander zuordenbar sind.
Mit Hilfe dieser Einrichtung kann der den Schlitzwandgreifer bedienende Baggerführer jederzeit erkennen, ob sich die im Aushub befindliche Schlitzwand bei der erreichten Tiefe innerhalb der vorgegebenen Lagetoleranzen befindet, bzw. ob und welche Korrekturen erforderlich sind.One embodiment provides that a depth measuring device is assigned to the diaphragm wall gripper and means are provided with which the display of the position detector and the display of the depth measuring device can be assigned to one another.
With the help of this device, the excavator operator operating the diaphragm wall grab can recognize at any time whether the diaphragm wall in the excavation is within the specified positional tolerances at the depth reached, and whether and which corrections are necessary.

Hierfür sieht eine weitere Ausgestaltung vor, daß der Schwenkeinrichtung und der sie beherrschenden Regeleinrichtung Mittel für einen übergeordneten manuellen Steuereingriff vom Baggerleitstand aus zugeordnet sind, mit deren Hilfe eine Richtungskorrektur des Greifers nach Maßgabe der Anzeige des Detektors möglich ist.For this purpose, a further embodiment provides that the swiveling device and the control device controlling it are assigned means for a higher-level manual control intervention from the excavator control center, with the aid of which a directional correction of the gripper is possible in accordance with the display of the detector.

Weiterhin ist vorgesehen, daß als Mittel zum gegenseitigen Verschwenken von Führungskörper und Innenkörper je links und rechts am Rahmen des Führungskörpers eine hydraulische Kolben/Zylinder-Einheit angelenkt ist, die mit einer ebenfalls am Rahmen schwenkbar gelagerten Hebelgelenkanordnung mit einem in hin- und hergehende Schwenkbewegungen versetzbaren Nocken in Wirkungsverbindung steht, wobei dieser in eine U-förmige Führung des Innenkörpers eingreift und diesen nach Maßgabe der Stellung des Nockens relativ zum Führungskörper aus der orthogonalen Lage in eine davon abweichende Schwenklage entsprechend einem Korrekturwinkel verschwenkt.Furthermore, it is provided that as a means for pivoting the guide body and inner body to the left and right of the frame of the guide body, a hydraulic piston / cylinder unit is articulated, which is also pivotally mounted on the frame lever assembly is in operative connection with a cam which can be moved back and forth, which engages in a U-shaped guide of the inner body and pivots this according to the position of the cam relative to the guide body from the orthogonal position into a different pivot position according to a correction angle.

Die Erfindung wird in schematischen Zeichnungen in bevorzugten Ausführungsformen gezeigt, wobei aus den Zeichnungen weitere vorteilhafte Einzelheiten der Erfindung entnehmbar sind. Es zeigen:

Figur 1
einen Schlitzwandgreifer in Ansicht aus einer Richtung quer zur Schlitzwand;
Figur 2
den Schlitzwandgreifer nach Fig. 1 in Seitenansicht aus einer Blickrichtung entlang der Schlitzwand, mit unverschwenkter Stellung von Führungskörper und Innenkörper;
Figur 3 und Figur 4
je eine Seitenansicht gemäß Fig. 2, jedoch mit in einem Korrekturwinkel α relativ zum Führungskörper verschwenktem Innenkörper;
Figur 5
eine etwas andere Ausführungsform des Schlitzwandgreifers in Ansicht quer zum Schlitzwandverlauf;
Figur 6
den Schlitzwandgreifer gemäß Fig. 5 in Seitenansicht aus einer Blickrichtung längs der Schlitzwand.
The invention is shown in schematic drawings in preferred embodiments, further advantageous details of the invention being apparent from the drawings. Show it:
Figure 1
a diaphragm wall gripper in view from a direction transverse to the diaphragm wall;
Figure 2
1 in a side view from a viewing direction along the diaphragm wall, with the guide body and inner body in a non-pivoted position;
Figure 3 and Figure 4
2 a side view according to FIG. 2, but with the inner body pivoted at a correction angle α relative to the guide body;
Figure 5
a slightly different embodiment of the diaphragm wall gripper in view transverse to the diaphragm wall;
Figure 6
5 in side view from a viewing direction along the diaphragm wall.

Der in der Figur 1 dargestellte Schlitzwandgreifer weist einen von einem äußeren Rahmen 12 gebildeten Führungskörper 11 auf. In diesem ist ein Innenkörper 10 mit daran angelenkten Greiferschaufeln 1 und hydraulischer Betätigungsvorrichtung 2 angeordnet. Der Innenkörper 10 ist im Führungskörper 11 mittels horizontaler, in Richtung der Schlitzwand 40 angeordneter Lagerzapfen 20 quer zum vertikalen Verlauf der Schlitzwand 40 schwenkbar angelenkt. Zwischen dem Führungskörper 11 und dem Innenkörper 10 sind hydraulische Verschwenkungsmittel 30 vorgesehen. Weiterhin sind am Innenkörper 10 und/oder am Führungskörper 11 Detektoren 25 zum Überwachen der vertikalen Lage dieser Körper angeordnet. Der bzw. die Detektor(en) 25 stehen über eine Signalleitung mit einer von diesen beherrschten Regelvorrichtung zur Betätigung der Verschwenkungsmittel 30 in ständiger Wirkungsbindung.
Dem Schlitzwandgreifer kann eine Tiefenmeßeinrichtung zugeordnet sein (nicht gezeigt), wobei Mittel vorgesehen sind, mit welchen die Anzeige des Lagedetektors 25 und die Anzeige der Tiefenmeßeinrichtung einander zuordenbar sind. Weiterhin kann sehr vorteilhaft von der Maßnahme Gebrauch gemacht sein, daß den Mitteln 30 zum Verschwenken des Innenkörpers 10 bzw. der sie beherrschenden Regeleinrichtung weitere Mittel für einen übergeordneten manuellen Steuereingriff vom Baggerleitstand aus zugeordnet sind (nicht gezeigt), mit deren Hilfe eine Lagekorrektur des Innenkörpers 10 relativ zum Führungskörper 11 nach Maßgabe der Lageanzeige des Lagedetektors 25 möglich ist.The diaphragm wall gripper shown in FIG. 1 has a guide body 11 formed by an outer frame 12. An inner body 10 with gripper blades 1 and hydraulic actuating device 2 articulated thereon is arranged in this. The inner body 10 is pivotally articulated in the guide body 11 by means of horizontal bearing pins 20 arranged in the direction of the diaphragm wall 40 transversely to the vertical course of the diaphragm wall 40. Hydraulic pivoting means 30 are provided between the guide body 11 and the inner body 10. Furthermore, detectors 25 for monitoring the vertical position of these bodies are arranged on the inner body 10 and / or on the guide body 11. The detector (s) 25 are in constant operation via a signal line with a control device controlled by them for actuating the pivoting means 30.
A depth measuring device can be assigned to the diaphragm wall gripper (not shown), means being provided with which the display of the position detector 25 and the display of the depth measuring device can be assigned to one another. Furthermore, use can be made very advantageously of the measure that the means 30 for pivoting the inner body 10 or the control device which controls them are assigned further means for a higher-level manual control intervention from the excavator control station (not shown), with the aid of which a position correction of the inner body is associated 10 relative to the guide body 11 is possible in accordance with the position indicator of the position detector 25.

Als Mittel zum gegenseitigen Verschwenken von Führungskörper 11 und Innenkörper 10 ist je links und rechts am Rahmen 12 des Führungskörpers eine Kolben/Zylinder-Einheit 30 angelenkt, die mit einer ebenfalls am Rahmen 12 schwenkbar gelagerten Hebelgelenkanordnung 32 mit einem daran in hin- und hergehende Schwenkbewegungen versetzbaren Nocken 33 in Wirkungsverbindung steht. Dieser greift in eine U-förmige Führung 34 des Innenkörpers 10 ein und verschwenkt diesen nach Maßgabe der Stellung des Nockens 33 relativ zum Führungskörper 11 aus der in den Figuren 2 und 6 gezeigten orthogonalen Lage in eine davon abweichende Schwenklage entsprechend dem Korrekturwinkel α in den Figuren 3 und 4. Wie aus den Figuren 1, 2, 5 und 6 erkennbar ist, hängt der Schlitzwandgreifer mit seinem Führungskörper 11 in einem Seilgehänge 3. Ein Vergleich der Schlitzwandgreifer nach den Figuren 1 und 5 zeigt geringfügige Unterschiede. Der Greifer nach Figur 5 ist eine vergleichsweise schwerere Ausführung mit einem verstärkten Rahmen 12 des äußeren Führungskörpers 11. Darin ist der Innenkörper 10 in den Lagerzapfen 20 quer zur Schlitzrichtung schwenkbar gelagert. Die hydraulischen Zylinder 30 sind dabei abweichend von der hängenden Anordnung nach den Figuren 1-4 stehend angeordnet. Es handelt sich dabei um eine rein handwerkliche im Ermessen des Konstrukteurs liegende Maßnahme. Ansonsten sind die beiden Ausführungen nach Figur 1 und Figur 5 funktionell gleich.
Entsprechend der Darstellung in Figur 1 ist vorzugsweise der Greiferinnenkörper 10 mit dem Winkelmeßgerät 25 ausgebildet und die Anzeige der Abweichung kann mit einer Tiefenmeßeinrichtung kombiniert werden, so daß die Abweichung auch der entsprechenden Schlitztiefe zugeordnet und am Leitstand angezeigt werden kann. Die Verstellung über das Hebelsystem 32 ist äußerst unkompliziert, bedarf in der Praxis kaum einer Wartung und arbeitet mit großer Genauigkeit. Die Verstellorgane 30 können aus einem Zylinderkörper mit mittigem Zylinderboden bestehen, aus dem unabhängig voneinander zwei Kolbenstangen ausfahrbar sind, von denen die eine am Greiferaußenkörper 11 und die andere am Greiferinnenkörper 10 angelenkt ist. Wie die Figuren 3 und 4 zeigen, kann bei doppelseitig ausgefahrenen Kolbenstangen gemäß Fig. 3 eine Schwenkung in einer Richtung bis zum Winkel α und bei beidseitig eingefahrenen Kolbenstangen eine Verschwenkung in Gegenrichtung bis zum Winkel α ausgeführt werden. Dabei kann die hydraulische Steuerung der Verstellzylinder derart ausgeführt sein, daß sowohl eine stufenlose Verstellung in beiden Richtungen als auch eine definierte Mittelstellung bzw. Neutralstellung vom Geräteführer beliebig angesteuert werden kann.As a means for pivoting the guide body 11 and the inner body 10 to the left and right of the frame 12 of the guide body, a piston / cylinder unit 30 is articulated, which has a lever joint arrangement 32 which is also pivotably mounted on the frame 12 and which has reciprocating pivoting movements thereon removable cams 33 is in operative connection. This engages in a U-shaped guide 34 of the inner body 10 and pivots this in accordance with the position of the cam 33 relative to the guide body 11 from the orthogonal position shown in FIGS. 2 and 6 into a different pivot position corresponding to the correction angle α in the figures 3 and 4. As can be seen from FIGS. 1, 2, 5 and 6, the diaphragm wall gripper hangs with its guide body 11 in a rope suspension 3. A comparison of the diaphragm wall grippers according to FIGS. 1 and 5 shows slight differences. The gripper according to FIG. 5 is a comparatively heavier version with a reinforced frame 12 of the outer guide body 11. The inner body 10 is pivotally mounted therein in the bearing pin 20 transversely to the slot direction. The hydraulic cylinders 30 are arranged differently from the hanging arrangement according to FIGS. 1-4. It is a purely manual measure at the designer's discretion. Otherwise, the two designs according to FIG. 1 and FIG. 5 are functionally the same.
According to the illustration in Figure 1, the gripper inner body 10 is preferably formed with the angle measuring device 25 and the display of the deviation can be combined with a depth measuring device, so that the deviation can also be assigned to the corresponding slot depth and displayed on the control center. The adjustment via the lever system 32 is extremely uncomplicated, requires hardly any maintenance in practice and works with great accuracy. The adjusting members 30 can consist of a cylinder body with a central cylinder base, from which two piston rods can be extended independently of one another, one of which is articulated on the outer body 11 of the gripper and the other on the inner body 10 of the gripper. As FIGS. 3 and 4 show, when the piston rods are extended on both sides according to FIG. 3, they can be pivoted in one direction up to the angle α and when the piston rods are retracted on both sides, they can be pivoted in the opposite direction up to the angle α. The hydraulic control of the adjusting cylinders can be designed in such a way that both an infinitely variable adjustment in both directions and a defined middle position or neutral position can be controlled as desired by the operator.

Der hydraulische Schlitzwandgreifer nach der Erfindung ist mit seiner Gelenkanordnung ein sehr unkompliziertes und robustes Gerät und ermöglicht ein entweder vollautomatisches oder handgesteuertes Korrigieren der Vortriebsrichtung der Greiferschaufeln. Insofern erfüllt die Erfindung in idealer Weise die eingangs gestellte Aufgabe.With its articulated arrangement, the hydraulic diaphragm wall gripper according to the invention is a very uncomplicated and robust device and enables the direction of advance of the gripper blades to be corrected either fully automatically or manually. In this respect, the invention ideally fulfills the task set out above.

Claims (7)

  1. A process for exactly holding the vertical excavating direction of a diaphragm wall (40) using a hydraulic diaphragm wall grab cooperating with an excavator, the vertical position of the diaphragm wall grab (1) being continuously supervised by means of an inclination detector, characterized in that said diaphragm wall grab is provided with an outer guide body (11) and an inner body (10) receiving the grab appliance, and that the vertical position of the inner body (10) and/or the guide body (11) are supervised and the signals from the inclination detector (10) are transferred to a control unit which, in case the bodies deviate from the predetermined vertical direction, compensates said deviation by swivelling the inner body (10) relative to the guide body (11) in opposite direction to said deviation.
  2. The process according to claim 1 characterized in that the control unit is controlled by an overriding manual regulative operation from the control panel of the excavator.
  3. The process according to claim 1 characterized in that an angular deviation from the vertical position is combined with a depth measuring unit allocated to the diaphragm wall grab and that a coordination of deviation and depth of the diaphragm wall (40) is calculated and signalled to the control panel of the diaphragm wall grab.
  4. A device for exactly holding the vertical excavating direction of a diaphragm wall (40) having a hydraulic diaphragm wall grab and an associated guide body (11) which is dimensioned according to the width of the grab shovels (1) and is provided at its top with a mounting for suspension to a carrying rope arrangement or to a telescopic rod assembly, characterized by the features:
    - that the guide body (11) is formed as outer frame (12) in which an inner body (10) with hinged grab shovels 1 and their hydraulic operating device (2) is arranged;
    - that the inner body (10) within the guide body (11) is hinged in transverse direction to the vertical course of the diaphragm wall (40) by means of horizontal journals (20) which are located in the direction of the diaphragm wall (40);
    - that hydraulic swivel mechanisms (30) are provided between the guide body (11) and the inner body (10);
    - that a position detector (25) to supervise the vertical position is located at the inner body (10) and/or guide body (11), and the excavator is provided with a control unit governed by said detector to operate the swivel mechanisms (30).
  5. The device according to claim 4 characterized in that a depth measuring unit is allocated to the diaphragm wall grab and that means are provided with which the indication of the position detector (25) and the indication of the depth measuring unit can be mapped on each other and signalled to the control panel of the diaphragm wall grab operator.
  6. The device according to claim 4 characterized in that means for an overriding manual control operation from the control panel of the excavator are allocated to the control unit which governs the means (30) for swivelling the inner body (10), allowing the position of the inner body (10) to be adjusted relative to the guide body (11) in accordance with the position indication of the position detector (25).
  7. The device according to any one of claims 4 to 6 characterized in that a hydraulic piston/cylinder-unit (30) is hinged to the left and to the right side of the frame (12) of guide body (11) as means for mutually swivelling the guide body (11) and the inner body (10), said unit interacting with an articulated lever arrangement (32) which is also pivoted at the frame (12) and has a cam (33) which can be set in reciprocating swivelling movements and engages into a U-shaped guidance (34) of the inner body (10) and swivels same in accordance with the position of the cam (33) relative to the guide body (11) from the orthogonal position into a different swivelling position corresponding to an adjustment angle α.
EP94909118A 1993-03-23 1994-03-07 Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain Revoked EP0690943B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9430040T SI0690943T1 (en) 1993-03-23 1994-03-07 Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4309233A DE4309233C1 (en) 1993-03-23 1993-03-23 Method and device for precisely maintaining the vertical direction of excavation of a diaphragm wall
DE4309233 1993-03-23
PCT/EP1994/000671 WO1994021864A1 (en) 1993-03-23 1994-03-07 Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain

Publications (2)

Publication Number Publication Date
EP0690943A1 EP0690943A1 (en) 1996-01-10
EP0690943B1 true EP0690943B1 (en) 1997-01-22

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EP94909118A Revoked EP0690943B1 (en) 1993-03-23 1994-03-07 Process and device for precisely maintaining the vertical excavation direction of a subterranean curtain

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US (1) US5707182A (en)
EP (1) EP0690943B1 (en)
JP (1) JP2866480B2 (en)
KR (1) KR100193543B1 (en)
CN (1) CN1085759C (en)
AT (1) ATE148191T1 (en)
DE (2) DE4309233C1 (en)
DK (1) DK0690943T3 (en)
ES (1) ES2099598T3 (en)
GR (1) GR3023175T3 (en)
WO (1) WO1994021864A1 (en)

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Publication number Publication date
GR3023175T3 (en) 1997-07-30
CN1085759C (en) 2002-05-29
US5707182A (en) 1998-01-13
DE4309233C1 (en) 1994-07-21
ATE148191T1 (en) 1997-02-15
KR960701265A (en) 1996-02-24
CN1119882A (en) 1996-04-03
KR100193543B1 (en) 1999-06-15
JPH08508072A (en) 1996-08-27
DK0690943T3 (en) 1997-08-18
JP2866480B2 (en) 1999-03-08
EP0690943A1 (en) 1996-01-10
DE59401660D1 (en) 1997-03-06
ES2099598T3 (en) 1997-05-16
WO1994021864A1 (en) 1994-09-29

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