EP0231404A1 - Earth pressure shield - Google Patents

Earth pressure shield Download PDF

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Publication number
EP0231404A1
EP0231404A1 EP86100197A EP86100197A EP0231404A1 EP 0231404 A1 EP0231404 A1 EP 0231404A1 EP 86100197 A EP86100197 A EP 86100197A EP 86100197 A EP86100197 A EP 86100197A EP 0231404 A1 EP0231404 A1 EP 0231404A1
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EP
European Patent Office
Prior art keywords
pressure
chamber
annular chamber
shield
front chamber
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
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EP86100197A
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German (de)
French (fr)
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EP0231404B1 (en
Inventor
Erich Dipl.-Ing. Jacob
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Wayss and Freytag AG
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Wayss and Freytag AG
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Priority to EP86100197A priority Critical patent/EP0231404B1/en
Priority to DE8686100197T priority patent/DE3676184D1/en
Publication of EP0231404A1 publication Critical patent/EP0231404A1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • E21D9/0875—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
    • E21D9/0879—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket the shield being provided with devices for lining the tunnel, e.g. shuttering

Definitions

  • the invention relates to an earth pressure shield, as described in the preamble of claim 1.
  • Earth pressure shields are shields in which the mechanically loosened floor fills the front space of the shield between the face and the guide wall.
  • the soil filling supports the face by coordinating the shield advance speed and soil extraction via the auger. With the help of permanent earth pressure measurements on site, soil extraction and extraction are coordinated so that there is no soil deficit and therefore no risk of settlement.
  • drum shield has a funnel-shaped guide wall which is firmly connected to the removal tool.
  • the front is closed at the rear by a baffle that is tightly and firmly built into the shield construction.
  • the object of the invention is to further develop an earth pressure shield so that with a simple, low-maintenance device the support pressure can be securely held in the front space and at the same time the loosened soil can be homogenized.
  • Soil parameters determined - a liquid pressure in the annular chamber, which is at least equal to the required support pressure in the front chamber, and a delivery capacity of the screw conveyor, which is slightly larger than the amount of soil removed determined by the rate of advance.
  • the removed soil is a soft-plastic mass with liquid-like properties or is prepared accordingly by adding homogenizing agents.
  • the check valves open and the homogenizing agent continues to flow until the liquid pressure in the front chamber is approximately equal to the pressure of the liquid in the annular chamber. This restores the support, because there is at least one pressure in the annular chamber at the level of the support pressure.
  • the supporting liquid is also a homogenizing agent and the floor is constantly mixed with the liquid by kneading tools rotating in the front space, the floor can always be kept in a consistency in which it is constantly flowing through the screw conveyor can be removed.
  • the earth pressure shield according to the invention can be operated as a compressed air shield.
  • an automatic material lock must be arranged at the end of the screw conveyor.
  • the bulkhead 2 delimits the front part of the shield under pressure.
  • the removal tool 3 removes the floor in the front chamber 6, 13 which is open to the working face.
  • the front chamber 6, 13 is limited at the rear by the guide wall 4, 11.
  • the guide wall 4, 11 and the bulkhead 2 enclose the annular chamber 5 and 12 between them.
  • shut-off devices 7 are arranged in the guide wall 4, 11.
  • the front chamber 6, 13 is accessible through a manhole 8 and a lock 9.
  • the dissolved, homogenized soil is conveyed out of the front chamber 6, 13 by means of a screw conveyor 10.
  • the exemplary embodiment according to FIG. 2 shows an earth pressure shield with a rotating front chamber 13.
  • the gap 14 which is open between the removal tool 3 or the guide wall 11 and the shield casing 15 and allows the rotation of the removal tool 3 with the front chamber 13 to be unsealed.
  • the penetration of groundwater and soil through the gap 14 is prevented by excess pressure in the filling medium of the annular chamber 12 - liquid in the example according to FIG. 2, air in the example according to FIG. 3.
  • the liquid pressure of the homogenizing agent in the annular chamber 5, 12 is kept constant by the compressed air cushion 18 in the pressure chamber 27 via a control device 17.
  • the feed of the homogenizing agent is carried out by a pump 16 and is controlled by an electrical transmitter 28 via the liquid level in the chamber 27.
  • the annular chamber 5, 12 is supplied with compressed air via the line 20.
  • an automatic material lock 19 is then installed instead of the adjustable slide 21 otherwise used.
  • Fig. 4 shows the example of a shut-off device 7, which regulates the flow of homogenizing agent from the annular chamber 5, 12 to the front chamber 6, 13 in the guide wall 4, 11.
  • the movement of the membrane 22 is converted via a lever linkage 23 into a movement of the piston 25, which thus causes the feed line 26 for the homogenizing agent introduced into the valve 24 to open or close.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

In an earth pressure shield for the extraction of plastic, mechanically transportable ground with a deflecting wall closing off the extraction chamber at the rear, in which the deflecting wall can be designed as a rotating drum connected to the extracting tool or as a fixed bulkhead wall, which earth pressure shield has means of preparing the loosened ground by the addition of plasticising means, the supporting pressure on the face is kept constant by the homogenising means fed to the front chamber (6, 13). For this purpose, the annular chamber (5, 12) between the bulkhead wall (2) and the deflecting wall (4, 11) is acted upon with homogenising means at a certain pressure level - at least the requisite supporting pressure for the face. The homogenising means flows through at least one non-return valve (7), arranged on the surface of the deflecting wall (4), out of the annular chamber (5, 12) into the front chamber (6, 13). The non-return valve (7) closes when excess pressure prevails in the front chamber (6, 13) relative to the annular chamber (5, 12) and opens when the pressure in the front chamber (6, 13) is less than in the annular chamber (5, 12). <IMAGE>

Description

Die Erfindung betrifft einen Erddruckschild, wie er im Gattungsbegriff des Anspruchs 1 beschrieben ist.The invention relates to an earth pressure shield, as described in the preamble of claim 1.

Als Erddruckschilde werden Schilde bezeichnet, bei denen der mechanisch gelöste Boden den Front­raum des Schildes zwischen Ortsbrust und der Leitwand satt füllt. Die Bodenfüllung bewirkt die Stützung der Ortsbrust, indem Schildvortriebs­geschwindigkeit und Bodenabzug über die Trans­portschnecke koordiniert werden. Mit Hilfe per­manenter Erddruckmessungen vor Ort werden Boden­abzug und Bodengewinnung so aufeinander abgestimmt, daß kein Bodendefizit und damit keine Setzungs­gefahr entsteht.Earth pressure shields are shields in which the mechanically loosened floor fills the front space of the shield between the face and the guide wall. The soil filling supports the face by coordinating the shield advance speed and soil extraction via the auger. With the help of permanent earth pressure measurements on site, soil extraction and extraction are coordinated so that there is no soil deficit and therefore no risk of settlement.

Vom Erddruckschild gibt es zwei Ausführungsarten. Der sogenannte Trommelschild weist eine trichter­förmig ausgebildete Leitwand auf, die mit dem Abbauwerkzeug fest verbunden ist. Der gesamte von der Leitwand umschlossene vordere Schildraum, in dem sich der abgebaute Boden befindet, rotiert mit dem Abbauwerkzeug. Bei dem zweiten Schildtyp rotieren nur die Abbau- und Knetwerkzeuge. Der Frontraum ist rückwärtig durch eine dicht und fest in der Schildkonstruktion eingebaute Leitwand geschlossen.There are two types of earth pressure sign. The so-called drum shield has a funnel-shaped guide wall which is firmly connected to the removal tool. The entire front shield space enclosed by the guide wall, in which the dismantled floor is located, rotates with the dismantling tool. Rotate on the second type of shield only the dismantling and kneading tools. The front is closed at the rear by a baffle that is tightly and firmly built into the shield construction.

Es ist bekannt, einen Erddruckschild mit Injek­tionsvorrichtungen zu versehen, die dazu dienen, einen Boden mit größerer innerer Reibung, der unbehandelt für den Transport in einer Förder­schnecke weniger geeignet ist, nach dem Abbau durch Zusatz von Bentonitsuspension oder aufberei­tetem Boden zu homogenisieren, d.h. ihm vor Eintritt in die Transportschnecke einen weich­plastischen Charakter zu geben.It is known to provide an earth pressure shield with injection devices which serve to homogenize a soil with greater internal friction, which is less suitable for transport in a screw conveyor if untreated, after mining by adding bentonite suspension or prepared soil, i.e. to give it a soft plastic character before entering the screw conveyor.

Die Abstimmung des Bodenabzugs mit der Vortriebs­geschwindigkeit bereitet wegen der Inkompressibi­lität des Bodens Schwierigkeiten. Es kann der Fall eintreten, daß die Frontkammer nicht satt mit Boden gefüllt und ein ausreichender Druck zur Stützung der Ortsbrust zeitweilig nicht vorhanden ist. Die Steuerung der Vortriebs- und Fördervor­gänge zur Wiederherstellung des erforderlichen Stützdrucks mit Hilfe von Druckmeßdosen in der Frontkammer ist schwerfällig und kann Einbrüche an der Ortsbrust und Setzungen nicht immer verhin­dern. Als nachteilig bei diesem bekannten Erddruck­schild wird daher angesehen, daß die Aufrechter­haltung eines gleichbleibenden Stützdrucks von be­ stimmter Größe nicht gewährleistet werden kann. Darüber hinaus ist für das Injizieren im Front­raum des Schildes zur Homogenisierung des Bodens ein weiterer unabhängiger Vorgang mit zusätzlicher Überwachung und Betriebsaufwand er­forderlich.The coordination of the soil extraction with the speed of advance causes difficulties because of the incompressibility of the soil. It can happen that the front chamber is not fully filled with soil and there is temporarily insufficient pressure to support the working face. Controlling the driving and conveying processes to restore the required support pressure with the help of pressure cells in the front chamber is cumbersome and cannot always prevent burglaries on the face and subsidence. A disadvantage of this known earth pressure shield is therefore considered that the maintenance of a constant support pressure of be certain size can not be guaranteed. In addition, another independent process with additional monitoring and operating effort is required for injecting in the front space of the sign to homogenize the soil.

Bei den bisher bekannten Ausführungen von Erd­druckschilden mit Trommel stellt das zwischen der rotierenden Trommel und der umgebenden festen Schildkonstruktion erforderliche komplizierte Dichtungssystem, das Boden- und Wassereintritt verhindern soll, ein zusätzliches konstruktives Problem dar. Ein solches Dichtungssystem ist sehr anfällig und führt zu einer starken Erhöhung des erforderlichen Drehmoments.In the previously known designs of earth pressure shields with a drum, the complicated sealing system required between the rotating drum and the surrounding fixed shield construction, which is intended to prevent soil and water from entering, represents an additional structural problem. Such a sealing system is very susceptible and leads to a large increase the required torque.

Aufgabe der Erfindung ist es, einen Erddruckschild so weiterzuentwickeln, daß mit einer einfachen wartungsarmen Vorrichtung sicher der Stützdruck im Frontraum gehalten und zugleich der gelöste Boden homogenisiert werden kann.The object of the invention is to further develop an earth pressure shield so that with a simple, low-maintenance device the support pressure can be securely held in the front space and at the same time the loosened soil can be homogenized.

Die Aufgabe wird durch die im kennzeichnenden Teil des Anspruchs 1 beschriebenen Mittel gelöst. Ausge­staltungen der Erfindung sind in den Unteransprüchen beschrieben.The object is achieved by the means described in the characterizing part of claim 1. Embodiments of the invention are described in the subclaims.

Beim Vortrieb mit dem erfindungsgemäßen Schild werden - abgestimmt auf die durch vorherige Erkun­ dungen festgestellten Bodenkennwerte - ein Flüs­sigkeitsdruck in der Ringkammer, der mindestens gleich dem erforderlichen Stützdruck in der Frontkammer ist, und eine Förderleistung der Förderschnecke, die geringfügig größer ist als die durch die Vortriebsgeschwindigkeit bestimmte ab­gebaute Bodenmenge, vorgegeben. Der abgeförderte Boden ist eine weich-plastische Masse mit flüssig­keitsähnlichen Eigenschaften oder wird durch Zugabe von Homogenisierungsmittel entsprechend aufberei­tet.When driving with the shield according to the invention are - matched to the previous exploration Soil parameters determined - a liquid pressure in the annular chamber, which is at least equal to the required support pressure in the front chamber, and a delivery capacity of the screw conveyor, which is slightly larger than the amount of soil removed determined by the rate of advance. The removed soil is a soft-plastic mass with liquid-like properties or is prepared accordingly by adding homogenizing agents.

Fällt während des Vortriebs der Stützdruck in der Frontkammer ab, wodurch Einbrüche der Ortsbrust verursacht werden könnten, dann öffnen sich die Rückschlagventile und Homogenisierungsmittel fließt so lange nach, bis der Flüssigkeitsdruck in der Frontkammer etwa wieder gleich dem Druck der Flüssigkeit in der Ringkammer ist. Damit ist die Stützung wieder hergestellt, denn in der Ring­kammer herrscht planmäßig mindestens ein Druck in Höhe des Stützdruckes.If the support pressure in the front chamber drops during the advance, which could cause the face to collapse, the check valves open and the homogenizing agent continues to flow until the liquid pressure in the front chamber is approximately equal to the pressure of the liquid in the annular chamber. This restores the support, because there is at least one pressure in the annular chamber at the level of the support pressure.

Da die Stützflüssigkeit zugleich Homogenisierungs­mittel ist und der Boden durch im Frontraum rotie­rende Knetwerkzeuge ständig mit der Flüssigkeit vermischt wird, kann der Boden immer in einer Konsistenz gehalten werden, in der er stetig durch die Förderschnecke abtransportierbar ist.Since the supporting liquid is also a homogenizing agent and the floor is constantly mixed with the liquid by kneading tools rotating in the front space, the floor can always be kept in a consistency in which it is constantly flowing through the screw conveyor can be removed.

Durch die Beaufschlagung der Ringkammer mit Homogenisierungsmittel, das unter einem Flüssig­keitsdruck steht, der mindestens dem Stützdruck des umliegenden Gebirges entspricht, kann weder Grund­wasser noch Boden durch den Spalt in den Schild­raum eindringen. Eine aufwendige Dichtungskonstruk­tion an dieser Stelle kann damit entfallen.By applying the homogenization agent to the annular chamber, which is under a liquid pressure that corresponds at least to the support pressure of the surrounding mountains, neither groundwater nor soil can penetrate into the shield space through the gap. A complex seal construction at this point can therefore be omitted.

Bei günstigen Bodenbedingungen kann der erfin­dungsgemäße Erddruckschild als Druckluftschild gefahren werden. In diesem Fall muß am Ende der Förderschnecke eine automatische Materialschleuse angeordnet werden.In favorable soil conditions, the earth pressure shield according to the invention can be operated as a compressed air shield. In this case, an automatic material lock must be arranged at the end of the screw conveyor.

Die Erfindung wird durch die Figuren 1 bis 4 erläutert. Es zeigen

  • Fign. 1 bis 3 Beispiele erfindungsgemäßer Erd­druckschilde im Längsschnitt:
    • Fig. 1 mit festeingebauter Leitwand 4,
    • Fig. 2 mit rotierender, trichterförmiger Leitwand 11,
    • Fig. 3 für Druckluftbetrieb mit rotierender Leitwand 11 und automatischer Ma­terialschleuse 19,
  • Fig. 4 ein Ausführungsbeispiel eines Rückschlag­ventils.
The invention is illustrated by FIGS. 1 to 4. Show it
  • Fig. 1 to 3 examples of earth pressure shields according to the invention in longitudinal section:
    • 1 with a fixed guide wall 4,
    • 2 with rotating, funnel-shaped guide wall 11,
    • 3 for compressed air operation with rotating guide wall 11 and automatic material lock 19,
  • Fig. 4 shows an embodiment of a check valve.

Bei einem Schild 1 begrenzt die Schottwand 2 den vorderen unter Druck stehenden Schildteil. Das Abbauwerkzeug 3 baut in der zur Ortsbrust offenen Frontkammer 6, 13 den Boden ab. Die Frontkammer 6, 13 wird rückwärtig durch die Leit­wand 4, 11 begrenzt. Die Leitwand 4, 11 und die Schottwand 2 schließen zwischen sich die Ring­kammer 5 bzw. 12 ein. In der Leitwand 4, 11 sind vom in der Frontkammer 6, 13 herrschenden Druck gesteuerte Absperrorgane 7 angeordnet, Die Front­kammer 6, 13 ist durch ein Mannloch 8 und eine Schleuse 9 begehbar. Der gelöste homogenisierte Boden wird mittels einer Förderschnecke 10 aus der Frontkammer 6, 13 herausgefördert.With a shield 1, the bulkhead 2 delimits the front part of the shield under pressure. The removal tool 3 removes the floor in the front chamber 6, 13 which is open to the working face. The front chamber 6, 13 is limited at the rear by the guide wall 4, 11. The guide wall 4, 11 and the bulkhead 2 enclose the annular chamber 5 and 12 between them. In the guide wall 4, 11 are controlled by the pressure prevailing in the front chamber 6, 13 shut-off devices 7 are arranged. The front chamber 6, 13 is accessible through a manhole 8 and a lock 9. The dissolved, homogenized soil is conveyed out of the front chamber 6, 13 by means of a screw conveyor 10.

Das Ausführungsbeispiel nach Fig. 2 zeigt einen Erddruckschild mit rotierender Frontkammer 13. Der zwischen dem Abbauwerkzeug 3 bzw. der Leitwand 11 und dem Schildmantel 15 offenstehende, die Rotation des Abbauwerkzeuges 3 mit der Frontkammer 13 zu­lassende Spalt 14 ist ungedichtet. Das Eindringen von Grundwasser und Boden durch den Spalt 14 wird durch Überdruck in dem Füllmedium der Ring­kammer 12 - Flüssigkeit im Beispiel nach Fig. 2, Luft im Beispiel nach Fig. 3 - verhindert.The exemplary embodiment according to FIG. 2 shows an earth pressure shield with a rotating front chamber 13. The gap 14 which is open between the removal tool 3 or the guide wall 11 and the shield casing 15 and allows the rotation of the removal tool 3 with the front chamber 13 to be unsealed. The penetration of groundwater and soil through the gap 14 is prevented by excess pressure in the filling medium of the annular chamber 12 - liquid in the example according to FIG. 2, air in the example according to FIG. 3.

Der Flüssigkeitsdruck des Homogenisierungsmittels in der Ringkammer 5, 12 wird in den Beispielen durch das Druckluftpolster 18 in der Druckkammer 27 über ein Steuergerät 17 konstant gehalten. Die Zufuhr des Homogenisierungsmittels erfolgt durch eine Pumpe 16 und wird von einem elektrischen Geber 28 über den Flüssigkeitsstand in der Kammer 27 ge­steuert.In the examples, the liquid pressure of the homogenizing agent in the annular chamber 5, 12 is kept constant by the compressed air cushion 18 in the pressure chamber 27 via a control device 17. The feed of the homogenizing agent is carried out by a pump 16 and is controlled by an electrical transmitter 28 via the liquid level in the chamber 27.

Für den Druckluftbetrieb des erfindungsgemäßen Schildes wird die Ringkammer 5, 12 über die Lei­tung 20 mit Druckluft beaufschlagt. Am Ende der Förderschnecke wird dann anstelle des sonst verwen­deten regelbaren Schiebers 21 eine automatische Ma­terialschleuse 19 eingebaut.For the compressed air operation of the shield according to the invention, the annular chamber 5, 12 is supplied with compressed air via the line 20. At the end of the screw conveyor, an automatic material lock 19 is then installed instead of the adjustable slide 21 otherwise used.

Fig. 4 zeigt das Beispiel eines Absperrorgans 7, das in der Leitwand 4, 11 den Zufluß von Homogeni­sierungsmittel von der Ringkammer 5, 12 zur Front­kammer 6, 13 regelt. Die Bewegung der Membran 22 wird über ein Hebelgestänge 23 in eine Bewegung des Kolbens 25 überführt, der damit ein Öffnen oder Schließen der in das Ventil 24 eingeführten Zu­leitung 26 für das Homogenisierungsmittel bewirkt.Fig. 4 shows the example of a shut-off device 7, which regulates the flow of homogenizing agent from the annular chamber 5, 12 to the front chamber 6, 13 in the guide wall 4, 11. The movement of the membrane 22 is converted via a lever linkage 23 into a movement of the piston 25, which thus causes the feed line 26 for the homogenizing agent introduced into the valve 24 to open or close.

Claims (5)

1. Erddruckschild für den Abbau von plastischen, mechanisch - beispielsweise mit Förderschnecken-­förderbaren Böden mit die Abbaukammer rückwär­tig abschließender Leitwand, bei der die Leit­wand als rotierende, mit dem Abbauwerkzeug ver­bundene Trommel oder als feste Schottwand aus­gebildet sein kann, der Mittel aufweist, den gelösten Boden durch Zugabe plastifizierender Mittel für die Abförderung in der Abbau­kammer aufzubereiten, dadurch ge­kennzeichnet
. daß zwischen der Schottwand (2) und der Leitwand (4, 11) eine mit fließfähigem Homo­genisierungsmittel beaufschlagbare Ringkam­mer (5, 12) um das Gehäuse der Förderschnek­ke (10) gebildet ist,
. daß das Homogenisierungsmittel der Ringkammer (5, 12) mit Hilfe einer geeigneten bekannten Vor­richtung - beispielsweise einem Druckluftpol­ster (18) - mit einem Druck von bestimmter Größe - mindestens dem erforderlichen Stütz­druck für die Ortsbrust - beaufschlagbar ist, und
. daß auf der Fläche der Leitwand (4) mindestens ein von dem in der Frontkammer herrschenden Druck gesteuertes Absperrorgan (7) angeordnet ist, durch das Homogenisierungsmittel aus der Ringkammer (5, 12) in die Frontkammer (6, 13) ausfließen kann, und das schließt, wenn in der Frontkammer (6, 13) gegenüber der Ring­kammer (5, 12) Überdruck herrscht, und öffnet, wenn der Druck in der Frontkammer (6, 13) geringer ist als in der Ringkammer (5, 12).1. Earth pressure shield for the dismantling of plastic, mechanically - for example with conveyable screw-conveyable soils with the dismantling chamber at the rear guiding wall, in which the guiding wall can be designed as a rotating drum connected to the dismantling tool or as a solid partition wall which has means, the loosened Prepare soil by adding plasticizing agents for removal in the mining chamber, characterized
. that between the bulkhead (2) and the guide wall (4, 11) an annular chamber (5, 12) which can be acted upon by flowable homogenizing agent is formed around the housing of the screw conveyor (10),
. that the homogenizing agent of the annular chamber (5, 12) can be acted upon with the aid of a suitable known device - for example a compressed air cushion (18) - with a pressure of a certain size - at least the required supporting pressure for the working face, and
. that at least one shut-off device (7) controlled by the pressure prevailing in the front chamber is arranged on the surface of the guide wall (4), through the homogenizing agent from the annular chamber (5, 12) can flow into the front chamber (6, 13), and that closes when there is overpressure in the front chamber (6, 13) with respect to the annular chamber (5, 12) and opens when the pressure in the front chamber (6, 13) is lower than in the annular chamber (5, 12). 2. Erddruckschild nach Anspruch 1, dadurch gekennzeichnet, daß Mittel - bei­spielsweise ein Luftpolster (18) - vorhanden sind, mit denen in der Ringkammer (12) ein solcher Flüssigkeitsdruck erzeugbar ist, daß kein Grundwasser und/oder Boden von außen durch den Spalt (14) zwischen dem Abbauwerkzeug (3) bzw. der Leitwand (11) der rotierenden Trommel und dem Schildmantel (15) in die Ringkammer (12) ein­dringen kann.2. Earth pressure sign according to claim 1, characterized in that means - for example an air cushion (18) - are available with which in the annular chamber (12) such a liquid pressure can be generated that no groundwater and / or soil from the outside through the gap ( 14) can penetrate into the annular chamber (12) between the removal tool (3) or the guide wall (11) of the rotating drum and the shield casing (15). 3. Erddruckschild nach Ansprüchen 1 und 2, da­durch gekennzeichnet,
daß zur Beschickung der Ringkammer (5, 12) mit Homogenisierungsmittel eine Pumpe (16) angeord­net ist, die durch einen elektrischen Geber (28) vom Flüssigkeitsstand in der Druckkammer (27) ge­steuert wird, und daß der Druck des Homogenisie­rungsmittels in der Ringkammer (5, 12) über das Luftpolster (18) in der Druckkammer (27) auf einer gewünschten Höhe konstant gehalten wird.3. Earth pressure sign according to claims 1 and 2, characterized in
that for charging the annular chamber (5, 12) with homogenizing means, a pump (16) is arranged, which is controlled by an electrical transmitter (28) from the liquid level in the pressure chamber (27), and that the pressure of the homogenizing agent in the annular chamber (5 , 12) is kept constant at a desired height via the air cushion (18) in the pressure chamber (27). 4. Erddruckschild nach Ansprüchen 1 bis 3, da­durch gekennzeichnet,
daß der Schild, in dem am Ende der Förderschnecke (10) eine automatische Materialschleuse (19) ange­ordnet und die Ringkammer (5, 12) über die vorhan­dene Leitung (20) mit Druckluft von konstantem Druck beaufschlagbar ist, als Druckluftschild einsetzbar ist.4. Earth pressure sign according to claims 1 to 3, characterized in
that the shield in which an automatic material lock (19) is arranged at the end of the screw conveyor (10) and the annular chamber (5, 12) can be pressurized with compressed air of constant pressure via the existing line (20) can be used as a compressed air shield. 5. Erddruckschild nach Ansprüchen 1 bis 4, da­durch gekennzeichnet, daß das Absperrorgan (7) folgende Teile aufweist:
. eine Membran (22) aus widerstandsfähigem Material - beispielsweise Gummi mit Schutzplat­te aus Stahl -, die in Abhängigkeit von dem in der Frontkammer (6, 13) herrschenden Druck aus­gelenkt wird,
. ein Hebelgestänge (23), durch das die Auslenkung der Membran (22) auf einen Kolbenschieber (24) übertragen wird, und
. einen Kolbenschieber (24), in dem ein Kolben (25) mit zunehmender Auslenkung der Membran (22) eine Zuleitung (26) schließt, durch die Homogeni­sierungsmittel aus der Ringkammer (5, 12) in die Frontkammer (6, 13) zuführbar ist.5. Earth pressure sign according to claims 1 to 4, characterized in that the shut-off device (7) has the following parts:
. a membrane (22) made of resistant material - for example rubber with a protective plate made of steel - which is deflected depending on the pressure prevailing in the front chamber (6, 13),
. a lever linkage (23) through which the deflection of the membrane (22) is transmitted to a piston valve (24), and
. a piston slide (24) in which a piston (25) closes a feed line (26) with increasing deflection of the membrane (22), through which homogenizing means can be fed from the annular chamber (5, 12) into the front chamber (6, 13).
EP86100197A 1986-01-09 1986-01-09 Earth pressure shield Expired - Lifetime EP0231404B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP86100197A EP0231404B1 (en) 1986-01-09 1986-01-09 Earth pressure shield
DE8686100197T DE3676184D1 (en) 1986-01-09 1986-01-09 EARTH SHIELD.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86100197A EP0231404B1 (en) 1986-01-09 1986-01-09 Earth pressure shield

Publications (2)

Publication Number Publication Date
EP0231404A1 true EP0231404A1 (en) 1987-08-12
EP0231404B1 EP0231404B1 (en) 1990-12-12

Family

ID=8194816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100197A Expired - Lifetime EP0231404B1 (en) 1986-01-09 1986-01-09 Earth pressure shield

Country Status (2)

Country Link
EP (1) EP0231404B1 (en)
DE (1) DE3676184D1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936801C1 (en) * 1989-11-04 1991-04-11 Wayss & Freytag Ag, 6000 Frankfurt, De Method of driving tunnel - involves forming chamber by bulkhead in which milling disc operates to cut face and loosen earth
WO1993009333A1 (en) * 1991-10-30 1993-05-13 Heierli & Co. Patentverwertungsgesellschaft Tunnel-driving machine
EP1172522A1 (en) * 2000-07-12 2002-01-16 Hochtief Aktiengesellschaft Driving shield tunneling machine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2347719A1 (en) * 1976-04-05 1977-11-04 Tekken Constr Co AUTOMATIC ADJUSTMENT OF HYDRAULIC PRESSURE ON THE FRONT OF TUNNEL DRILLING IN THE HYDRAULIC TUNNEL DRILLING SYSTEM AT THE SHIELD
FR2382579A1 (en) * 1977-03-05 1978-09-29 Gewerk Eisenhuette Westfalia SHIELD DIGGING DEVICE WITH SIZE FRONT HOLDING USING A LIQUID
US4165129A (en) * 1977-11-17 1979-08-21 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Shield tunneling machine and method
GB1570329A (en) * 1976-02-12 1980-06-25 Daiko Const Method and apparatus for excavating horizontal tunnels
DE2909395A1 (en) * 1979-03-09 1980-09-18 Gewerk Eisenhuette Westfalia Loose earth tunnel or gallery driving excavator - has variously spaced openings in concentrically revolving arms over whole head radius
EP0042993A1 (en) * 1980-06-30 1982-01-06 Kabushiki Kaisha Iseki Kaihatsu Koki Shield tunneling method and machine therefor
DE3330635A1 (en) * 1983-08-25 1985-03-21 Wayss & Freytag Ag, 6000 Frankfurt Driving shield

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1570329A (en) * 1976-02-12 1980-06-25 Daiko Const Method and apparatus for excavating horizontal tunnels
FR2347719A1 (en) * 1976-04-05 1977-11-04 Tekken Constr Co AUTOMATIC ADJUSTMENT OF HYDRAULIC PRESSURE ON THE FRONT OF TUNNEL DRILLING IN THE HYDRAULIC TUNNEL DRILLING SYSTEM AT THE SHIELD
FR2382579A1 (en) * 1977-03-05 1978-09-29 Gewerk Eisenhuette Westfalia SHIELD DIGGING DEVICE WITH SIZE FRONT HOLDING USING A LIQUID
US4165129A (en) * 1977-11-17 1979-08-21 Ishikawajima-Harima Jukogyo Kabushiki Kaisha Shield tunneling machine and method
DE2909395A1 (en) * 1979-03-09 1980-09-18 Gewerk Eisenhuette Westfalia Loose earth tunnel or gallery driving excavator - has variously spaced openings in concentrically revolving arms over whole head radius
EP0042993A1 (en) * 1980-06-30 1982-01-06 Kabushiki Kaisha Iseki Kaihatsu Koki Shield tunneling method and machine therefor
DE3330635A1 (en) * 1983-08-25 1985-03-21 Wayss & Freytag Ag, 6000 Frankfurt Driving shield

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3936801C1 (en) * 1989-11-04 1991-04-11 Wayss & Freytag Ag, 6000 Frankfurt, De Method of driving tunnel - involves forming chamber by bulkhead in which milling disc operates to cut face and loosen earth
WO1993009333A1 (en) * 1991-10-30 1993-05-13 Heierli & Co. Patentverwertungsgesellschaft Tunnel-driving machine
US5443305A (en) * 1991-10-30 1995-08-22 Heierli & Co. Tunnelling machine
EP1172522A1 (en) * 2000-07-12 2002-01-16 Hochtief Aktiengesellschaft Driving shield tunneling machine

Also Published As

Publication number Publication date
DE3676184D1 (en) 1991-01-24
EP0231404B1 (en) 1990-12-12

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