EP1235961A1 - Method and arrangement for concreting vertical shafts - Google Patents

Method and arrangement for concreting vertical shafts

Info

Publication number
EP1235961A1
EP1235961A1 EP00989859A EP00989859A EP1235961A1 EP 1235961 A1 EP1235961 A1 EP 1235961A1 EP 00989859 A EP00989859 A EP 00989859A EP 00989859 A EP00989859 A EP 00989859A EP 1235961 A1 EP1235961 A1 EP 1235961A1
Authority
EP
European Patent Office
Prior art keywords
concrete
downpipe
outlet
cylinder
concrete column
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00989859A
Other languages
German (de)
French (fr)
Other versions
EP1235961B1 (en
Inventor
Rolf Dose
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.)
Putzmeister Concrete Pumps GmbH
Original Assignee
Putzmeister AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Putzmeister AG filed Critical Putzmeister AG
Publication of EP1235961A1 publication Critical patent/EP1235961A1/en
Application granted granted Critical
Publication of EP1235961B1 publication Critical patent/EP1235961B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the invention relates to a method and an arrangement for concreting deep, vertical shafts, in which concrete is conveyed from the surface via a concrete column located in a downpipe to a lower application point.
  • the shafts occurring in mining which are to be concreted with the method according to the invention, have a depth of, for example, 500 m and more. If the concrete falls in the downpipe in an uncontrolled manner, there is a risk of segregation and blockage formation. This is especially true if deflections are provided within the downpipe.
  • the purely gravimetric spreading of the concrete is associated with a high level of wear in such deep shafts, even if several blocking slides are provided along the drop line, which are switched periodically.
  • the available gate valves cannot be used for reliable use due to the high switching wear caused by the abrasive concrete and the large number of switching operations required.
  • the object of the invention is to develop a method and an arrangement for concreting deep, vertical shafts, with which a reliable and segregation-free transport of the
  • the solution according to the invention is based on the procedural idea that the concrete is removed in portions from the downstream end of the downpipe from the advancing concrete column, separated from the concrete column and depressurized and then fed to the application site.
  • the concrete column at the outlet end of the downpipe is guided into a cylinder and is supported there by a piston which moves back with an increase in the cylinder volume, so that the cylinder content of the the remaining concrete column is separated and then, preferably with the piston advanced, is discharged from the cylinder directly or indirectly to the application site.
  • the concrete is expediently fed into a buffer container and from there to the application point.
  • the depressurized concrete is advantageously fed to the application point over a further drop distance, which is shorter than the concrete column and can be formed, for example, by a distribution hose.
  • the cylinder arrangement described is a decompression pump that is pressurized on the inlet side by the pressurized concrete column, in which the concrete is depressurized in portions and then fed to the application point.
  • the advancing concrete column at the outlet-side end of the downpipe is diverted into the upward-pointing, downwardly open cylinder, while the concrete portions separated from the concrete column are discharged downwards from the cylinder.
  • a further preferred embodiment of the invention provides that the advancing concrete column is alternately introduced into two separate cylinders at the outlet-side end of the downpipe and is portioned in counter-clockwise fashion and discharged without pressure, if necessary, to the application point via the buffer container.
  • the downpipe must be filled with concrete so that there is no separation and no destruction along the fall line.
  • the downpipe is first filled with filling water before the concrete is introduced into the downpipe with the interposition of at least one sealing element.
  • the filling water then obtained on the outlet side is conveyed upwards via a return pipe connected to the lower end of the downpipe and communicating with it, preferably of a smaller diameter, under the action of the tracked concrete column or discarded into the shaft.
  • an arrangement for concreting deep, vertical shafts which has a filling pump arranged above ground and a downpipe connected to the filling pump, the outlet-side end of the downpipe being connectable to a pressure-tight decompression pump, the outlet of which can be connected to the application point is.
  • a hand-movable distributor hose leading to the application point can be connected to the outlet.
  • the decompression pump has a pipe switch which can be connected on the inlet side to the downpipe and which can be connected pressure-tight alternately on the outlet side to one of two cylinders, of which the other cylinder opens into an outlet line preferably via a common buffer tank, in the cylinders are arranged in push-pull reciprocating pistons.
  • the pipe switch is arranged in the buffer tank under the cylinders that are open at the bottom and points upwards on the outlet side in the direction of the cylinder openings.
  • the connecting line which is designed, for example, as a distribution hose, points downward from the decompression pump, so that the depressurized concrete can be conveyed to the application site under the influence of gravity.
  • a blocking slide is arranged in the downpipe in front of the decompression pump.
  • a lockable return line communicating with the downpipe is preferably connected with a smaller cross section than the downpipe.
  • the return line is used to lead the water, which was filled with concrete before the downpipe was filled, upwards out of the shaft under the action of the advancing concrete column. The water is returned on the principle of communicating tubes.
  • the invention also relates to a decompression pump for conveying pressure-loaded thick materials, in particular concrete, to an application point, in particular for use in a concreting arrangement of the type described above.
  • the decompression pump has a pipe switch acted on one side with the pressure-loaded thick material, which alternately connects to the outlet side of two cylinders can be connected in a pressure-tight manner, of which the other cylinder opens into an outlet preferably via a common buffer container, and two pistons which can be pushed back and forth in push-pull fashion are arranged in the cylinders.
  • the buffer container expediently has an outlet connection on the bottom, preferably pointing downwards, to which a distributor hose is connectable. It is also expediently provided with a maintenance opening which can be closed in a pressure-tight manner.
  • the above measures ensure that the pressures generated by the concrete column can be controlled at any depth of the shaft and that the concrete can be installed without any problems.
  • a control device for the synchronous activation of the filling pump and the decompression pump is advantageously provided.
  • FIG. 1 shows a section through a shaft with a shaft concreting system.
  • FIG. 2 shows a detail X from FIG. 1 in an enlarged representation
  • Fig. 3 is an enlarged section of Fig. 2 with the decompression pump in a partially sectioned representation.
  • the arrangement shown in the drawing is for concreting the shaft walls 10 of a shaft 12 with a depth of e.g. 500 m and more determined.
  • the concrete is freed from the various platforms 14, which can be reached via a ladder 16, with a hand-guided distribution hose 18 into the pre-assembled formwork 20 on the floor
  • the delivery of the concrete via the distribution hose 18 takes place through the outlet 24 of a decompression pump 26 which is connected to a down pipe 30 at its inlet 28.
  • the downpipe 30 leads from the surface (upper edge 31 of the shaft 12) essentially vertically downwards on one of the shaft walls 10 and is at the level of the lower edge of the decompression pump 26 towards it. arc.
  • the downpipe 30 is charged with concrete on the inlet side via a filling pump 32, so that a concrete column forms in the downpipe 30, which is present at the end of the downpipe 30 under high pressure at the inlet 28 of the decompression pump.
  • the decompression pump 26 comprises a tube switch 34 designed as an S-tube, which is pivotably mounted in a buffer tank 36 about a vertical axis 38 concentric with the inlet opening 28 by means of a hydraulic drive 40.
  • a tube switch 34 designed as an S-tube, which is pivotably mounted in a buffer tank 36 about a vertical axis 38 concentric with the inlet opening 28 by means of a hydraulic drive 40.
  • two feed cylinders 42 are arranged vertically, which open into the buffer tank 36 with their downward-facing openings 44 and whose pistons, not shown, can be driven in push-pull with the aid of a hydraulic cylinder 46, the piston of which on the rod side through a water tank 47 are.
  • the pipe switch 34 is driven synchronously with the hydraulic cylinders 46 via the hydraulic drive 40, so that the outlet opening 48 of the pipe switch 44 alternately reaches one of the cylinder openings, while the other cylinder opening 44 points freely downward into the buffer container.
  • the hydraulic unit 54 for supplying the hydraulic drive 40 and the hydraulic cylinder 46 is located on one of the platforms 14 in the vicinity of the decompression pump 26.
  • the pipe switch 34 is in front of the relevant cylinder opening 44 in each of the cylinders 42 when the piston is lowered switched so that the pressurized concrete column is supported through the pipe switch 34 against the piston in question. When the piston is retracted, the advancing concrete column penetrates into the relevant cylinder 42 until the piston reaches its upper end position.
  • the switch is switched to the other cylinder, the piston of which is in its lower end position.
  • the first cylinder is opened toward the buffer container 46 so that the portion of concrete therein is depressurized via the atmospheric pressure prevailing in the buffer container 46 and reaches the buffer container 36 when the piston in question is advanced. From the buffer tank 36, the concrete falls through the leave 24 in the distribution hose 18 and from there is passed in free fall to the application point in the formwork 20.
  • the buffer container 36 is provided with a side cover 50 which can be opened for maintenance purposes. Prior to this, the downpipe 30 is expediently blocked by a slide 52 in order to make the pipe switch 34 free of pressure.
  • a water line 56 is additionally provided which communicates with the downpipe 30 in the area of the slide 42 and in the lower arc area of the downpipe 30.
  • the decompression pump 26 must then be started via the hydraulic drive 40 and the hydraulic cylinders 46.
  • the system is cleaned by means of a water column which is introduced into the downpipe from above with the interposition of a cleaning pig with the filling pump 32 switched off. About 20 m of water are sufficient for this, which gradually moves into the buffer tank 36 as the decompression pump 26 continues to operate.
  • the invention relates to a method and an arrangement for concreting vertical shafts with a depth of, for example, 500 m and more.
  • the concrete is conveyed there via a concrete column located in a downpipe 30 to a lower-lying application point 20.
  • the concrete at the outlet end of the downpipe 30 is removed in portions from the advancing concrete column, separated from the concrete column and depressurized and then fed to the application site.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reciprocating Pumps (AREA)
  • Treatment Of Sludge (AREA)

Abstract

A method and an arrangement for concretizing vertical shafts having a depth of e.g. 500 m or more. The concrete is conveyed to a low-lying application site (20) in the shaft by a concrete column that is situated in a downpipe (30). Delivery of concrete is guaranteed without separation (demixing) or clogging of concrete. The concrete is removed in portions of from the succeeding concrete column at the output end of the downpipe (30), is separated from the concrete column, is depressurized and it subsequently conveyed to the application site.

Description

Verfahren und Anordnung zum Betonieren von vertikalen SchächtenMethod and arrangement for concreting vertical shafts
Beschreibungdescription
Die Erfindung betrifft ein Verfahren und eine Anordnung zum Betonieren von tiefen, vertikalen Schächten, bei welchem Beton von übertage über eine in einem Fallrohr befindliche Betonsäule zu einer tieferliegenden Applikationsstelle gefördert wird.The invention relates to a method and an arrangement for concreting deep, vertical shafts, in which concrete is conveyed from the surface via a concrete column located in a downpipe to a lower application point.
Die im Bergbau vorkommenden Schächte, die mit dem erfindungsgemäßen Verfahren betoniert werden sollen, haben eine Tiefe von beispielsweise 500 m und mehr. Wenn der Beton in dem Fallrohr unkontrolliert abstürzt, besteht die Gefahr einer Entmischung und einer Stopferbildung. Dies gilt vor allem auch dann, wenn innerhalb des Fallrohrs Umlenkungen vorgesehen sind. Die rein gravimetrische Ausbringung des Betons ist bei so tiefen Schächten mit einem hohen Verschleiß verbunden, selbst wenn entlang der Fallstrecke mehrere Sperrschieber vorgesehen werden, die periodisch geschaltet werden. Im übrigen sind die zur Verfügung stehenden Sperrschieber wegen des hohen Schaltverschleißes durch den abrasiven Beton und der Vielzahl der notwendigen Schaltvorgänge für einen zuverlässigen Einsatz nicht verwendbar.The shafts occurring in mining, which are to be concreted with the method according to the invention, have a depth of, for example, 500 m and more. If the concrete falls in the downpipe in an uncontrolled manner, there is a risk of segregation and blockage formation. This is especially true if deflections are provided within the downpipe. The purely gravimetric spreading of the concrete is associated with a high level of wear in such deep shafts, even if several blocking slides are provided along the drop line, which are switched periodically. In addition, the available gate valves cannot be used for reliable use due to the high switching wear caused by the abrasive concrete and the large number of switching operations required.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, ein Verfahren und eine Anordnung zum Betonieren von tiefen, vertikalen Schächten zu entwickeln, womit ein zuverlässiger und entmischungsfreier Transport desProceeding from this, the object of the invention is to develop a method and an arrangement for concreting deep, vertical shafts, with which a reliable and segregation-free transport of the
Betons zu den Applikationsstellen bei größtmöglicher Betriebssicherheit gewährleistet ist.Concrete to the application points is guaranteed with the greatest possible operational reliability.
Zur Lösung dieser Aufgabe werden die in den Ansprüchen 1 , 9 und 18 an- gegebenen Merkmalskombinationen vorgeschlagen. Vorteilhafte Ausgestal- tungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the combinations of features specified in claims 1, 9 and 18 are proposed. Advantageous design lines and developments of the invention result from the dependent claims.
Der erfindungsgemäßen Lösung liegt der verfahrensmäßige Gedanke zu- gründe, daß der Beton am ausgangsseitigen Ende des Fallrohrs portionsweise aus der nachrückenden Betonsäule entnommen, von der Betonsäule abgetrennt und dabei drucklos gestellt und sodann der Applikationsstelle zugeführt wird. Um dies zu erreichen, wird gemäß einer bevorzugten Ausgestaltung der Erfindung vorgeschlagen, daß die Betonsäule am ausgangssei- tigen Ende des Fallrohrs in einen Zylinder geleitet und dort von einem unter Vergrößerung des Zylindervolumens zurückweichenden Kolben abgestützt wird, daß der Zylinderinhalt nach Erreichen einer Kolbenendlage von der übrigen Betonsäule abgetrennt und danach vorzugsweise unter Vorschub des Kolbens aus dem Zylinder unmittelbar oder mittelbar zur Applikations- stelle ausgetragen wird. Beim mittelbaren Austrag wird der Beton zweckmäßig in einen Pufferbehälter geleitet und von dort der Applikationsstelle zugeführt. Der drucklos gestellte Beton wird vorteilhafterweise über eine weitere Fallstrecke, die kürzer als die Betonsäule ist und beispielsweise durch einen Verteilerschlauch gebildet sein kann, der Applikationsstelle zugeleitet.The solution according to the invention is based on the procedural idea that the concrete is removed in portions from the downstream end of the downpipe from the advancing concrete column, separated from the concrete column and depressurized and then fed to the application site. In order to achieve this, it is proposed according to a preferred embodiment of the invention that the concrete column at the outlet end of the downpipe is guided into a cylinder and is supported there by a piston which moves back with an increase in the cylinder volume, so that the cylinder content of the the remaining concrete column is separated and then, preferably with the piston advanced, is discharged from the cylinder directly or indirectly to the application site. In the case of indirect discharge, the concrete is expediently fed into a buffer container and from there to the application point. The depressurized concrete is advantageously fed to the application point over a further drop distance, which is shorter than the concrete column and can be formed, for example, by a distribution hose.
Technisch gesehen handelt es sich bei der beschriebenen Zylinderanordnung um eine Dekompressionspumpe, die eingangsseitig mit der unter Druck stehenden nachrückenden Betonsäule beaufschlagt ist, in der der Beton portionsweise drucklos gestellt wird und sodann der Applikationsstelle zugeführt wird.Technically speaking, the cylinder arrangement described is a decompression pump that is pressurized on the inlet side by the pressurized concrete column, in which the concrete is depressurized in portions and then fed to the application point.
Gemäß einer bevorzugten Ausgestaltung der Erfindung wird die nachrük- kende Betonsäule am austrittsseitigen Ende des Fallrohrs in den nach oben weisenden, nach unten offenen Zylinder umgeleitet, während die von der Betonsäule abgetrennten Betonportionen vom Zylinder aus nach unten ausgetragen werden. Eine weitere bevorzugte Ausgestaltung der Erfindung sieht vor, daß die nachrückende Betonsäule am austrittsseitigen Ende des Fallrohrs abwechselnd in zwei getrennte Zylinder eingeleitet wird und von diesen im Gegen- takt portioniert und drucklos gegebenenfalls über den Pufferbehälter zur Applikationsstelle ausgetragen wird.According to a preferred embodiment of the invention, the advancing concrete column at the outlet-side end of the downpipe is diverted into the upward-pointing, downwardly open cylinder, while the concrete portions separated from the concrete column are discharged downwards from the cylinder. A further preferred embodiment of the invention provides that the advancing concrete column is alternately introduced into two separate cylinders at the outlet-side end of the downpipe and is portioned in counter-clockwise fashion and discharged without pressure, if necessary, to the application point via the buffer container.
Anfänglich muß das Fallrohr so mit Beton gefüllt werden, daß es zu keiner Entmischung und zu keiner Zerstörung entlang der Fallstrecke kommt. Um dies zu erreichen, wird das Fallrohr zunächst mit Füllwasser gefüllt, bevor der Beton unter Zwischenlage mindestens eines Dichtelements in das Fallrohr eingeleitet wird. Das sodann austrittsseitig anfallende Füllwasser wird über ein am unteren Ende des Fallrohrs angeschlossenes und mit diesem kommunizierendes Rücklaufrohr vorzugsweise kleineren Durchmessers un- ter der Einwirkung der nachgeführten Betonsäule nach oben gefördert oder in den Schacht hinein verworfen.Initially, the downpipe must be filled with concrete so that there is no separation and no destruction along the fall line. To achieve this, the downpipe is first filled with filling water before the concrete is introduced into the downpipe with the interposition of at least one sealing element. The filling water then obtained on the outlet side is conveyed upwards via a return pipe connected to the lower end of the downpipe and communicating with it, preferably of a smaller diameter, under the action of the tracked concrete column or discarded into the shaft.
Zur Durchführung des erfindungsgemäßen Verfahrens ist eine Anordnung zum Betonieren von tiefen, vertikalen Schächten vorgesehen, die eine übertage angeordnete Füllpumpe und ein an die Füllpumpe angeschlossenes Fallrohr aufweist, wobei das austrittsseitige Ende des Fallrohrs an eine druckdichte Dekompressionspumpe anschließbar ist, deren Auslaß mit der Applikationsstelle verbindbar ist. Vorteilhafterweise ist an den Auslaß ein zur Applikationsstelle führender, von Hand bewegbarer Verteilerschlauch an- schließbar.To carry out the method according to the invention, an arrangement for concreting deep, vertical shafts is provided, which has a filling pump arranged above ground and a downpipe connected to the filling pump, the outlet-side end of the downpipe being connectable to a pressure-tight decompression pump, the outlet of which can be connected to the application point is. Advantageously, a hand-movable distributor hose leading to the application point can be connected to the outlet.
Gemäß einer bevorzugten Ausgestaltung der Erfindung weist die Dekompressionspumpe eine eintrittsseitig mit dem Fallrohr verbindbare Rohrweiche auf, die austrittsseitig abwechselnd an einen von zwei Zylindern druckdicht anschließbar ist, von denen der jeweils andere Zylinder vorzugsweise über einen gemeinsamen Pufferbehälter in eine Auslaßleitung mündet, wobei in den Zylindern im Gegentakt hin- und herverschiebbare Kolben angeordnet sind. Die Rohrweiche ist im Pufferbehälter unter den nach unten offenen Zylindern angeordnet und weist austrittsseitig in Richtung Zylinderöffnungen nach oben. Andererseits weist die beispielsweise als Verteilerschlauch aus- gebildete Anschlußleitung von der Dekompressionspumpe aus nach unten, so daß der drucklos gestellte Beton unter der Einwirkung der Schwerkraft zur Applikationsstelle gefördert werden kann. Um Wartungsarbeiten an der Dekompressionspumpe ausführen zu können, ohne die Betonsäule aus dem Fallrohr zu entfernen, ist in dem Fallrohr vor der Dekompressionspumpe ein Sperrschieber angeordnet.According to a preferred embodiment of the invention, the decompression pump has a pipe switch which can be connected on the inlet side to the downpipe and which can be connected pressure-tight alternately on the outlet side to one of two cylinders, of which the other cylinder opens into an outlet line preferably via a common buffer tank, in the cylinders are arranged in push-pull reciprocating pistons. The pipe switch is arranged in the buffer tank under the cylinders that are open at the bottom and points upwards on the outlet side in the direction of the cylinder openings. On the other hand, the connecting line, which is designed, for example, as a distribution hose, points downward from the decompression pump, so that the depressurized concrete can be conveyed to the application site under the influence of gravity. In order to be able to carry out maintenance work on the decompression pump without removing the concrete column from the downpipe, a blocking slide is arranged in the downpipe in front of the decompression pump.
Weiter ist gemäß einer bevorzugten Ausgestaltung der Erfindung an der tiefsten Stelle des Fallrohrs vor der Dekompressionspumpe eine mit dem Fallrohr kommunizierende absperrbare Rücklaufleitung vorzugsweise mit kleine- rem Querschnitt als das Fallrohr angeschlossen. Die Rücklaufleitung dient dazu, das vor dem Befüllen des Fallrohrs mit Beton eingefüllte Wasser unter der Einwirkung der nachrückenden Betonsäule nach oben aus dem Schacht herauszuführen. Die Wasserrückführung erfolgt dabei nach dem Prinzip der kommunizierenden Röhren.Furthermore, according to a preferred embodiment of the invention, at the lowest point of the downpipe in front of the decompression pump, a lockable return line communicating with the downpipe is preferably connected with a smaller cross section than the downpipe. The return line is used to lead the water, which was filled with concrete before the downpipe was filled, upwards out of the shaft under the action of the advancing concrete column. The water is returned on the principle of communicating tubes.
Die Erfindung bezieht sich ferner auf eine Dekompressionspumpe zur Förderung von druckbelasteten Dickstoffen insbesondere von Beton zu einer Applikationsstelle, insbesondere für den Einsatz in einer Betonieranordnung der vorbeschriebenen Art. Die Dekompressionspumpe weist erfindungsgemäß eine einseitig mit dem druckbelasteten Dickstoff beaufschlagte Rohrweiche auf, die austrittsseitig abwechselnd an einen von zwei Zylindern druckdicht anschließbar ist, von denen der jeweils andere Zylinder vorzugsweise über einen gemeinsamen Pufferbehälter in einen Auslaß mündet, und wobei in den Zylindern zwei in Gegentakt hin- und herverschiebbare Kolben angeord- net sind. Der Pufferbehälter weist zweckmäßig einen bodenseitigen, vorzugsweise nach unten weisenden Auslaßstutzen auf, an den ein Verteiler- schlauch anschließbar ist. Weiter ist er zweckmäßig mit einer druckdicht verschließbaren Wartungsöffnung versehen.The invention also relates to a decompression pump for conveying pressure-loaded thick materials, in particular concrete, to an application point, in particular for use in a concreting arrangement of the type described above. According to the invention, the decompression pump has a pipe switch acted on one side with the pressure-loaded thick material, which alternately connects to the outlet side of two cylinders can be connected in a pressure-tight manner, of which the other cylinder opens into an outlet preferably via a common buffer container, and two pistons which can be pushed back and forth in push-pull fashion are arranged in the cylinders. The buffer container expediently has an outlet connection on the bottom, preferably pointing downwards, to which a distributor hose is connectable. It is also expediently provided with a maintenance opening which can be closed in a pressure-tight manner.
Mit vorstehenden Maßnahmen wird gewährleistet, daß die über die Beton- säule erzeugten Drücke in jeder Tiefe des Schachtes beherrscht werden können und der Betoneinbau problemlos erfolgt. Vorteilhafterweise ist zu diesem Zweck eine Steuerungseinrichtung zur synchronen Ansteuerung der Füllpumpe und der Dekompressionspumpe vorgesehen.The above measures ensure that the pressures generated by the concrete column can be controlled at any depth of the shaft and that the concrete can be installed without any problems. For this purpose, a control device for the synchronous activation of the filling pump and the decompression pump is advantageously provided.
Im folgenden wird die Erfindung anhand eines in der Zeichnung in schemati- scher Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigenThe invention is explained in more detail below on the basis of an exemplary embodiment shown schematically in the drawing. Show it
Fig. 1 einen Schnitt durch einen Schacht mit einer Schachtbetonieranlage;1 shows a section through a shaft with a shaft concreting system.
Fig. 2 einen Ausschnitt X aus Fig. 1 in vergrößerter Darstellung;FIG. 2 shows a detail X from FIG. 1 in an enlarged representation;
Fig. 3 einen vergrößerten Ausschnitt aus Fig. 2 mit der Dekompressionspumpe in teilweise geschnittener Darstellung.Fig. 3 is an enlarged section of Fig. 2 with the decompression pump in a partially sectioned representation.
Die in Zeichnung dargestellte Anordnung ist zum Betonieren der Schachtwände 10 eines Schachts 12 mit einer Tiefe von z.B. 500 m und mehr bestimmt. Der Beton wird von den verschiedenen Plattformen 14 aus, die über eine Leiter 16 erreichbar sind, mit einem von Hand geführten Verteiler- schlauch 18 in freiem Fall in die vormontierten Schalungen 20, die am BodenThe arrangement shown in the drawing is for concreting the shaft walls 10 of a shaft 12 with a depth of e.g. 500 m and more determined. The concrete is freed from the various platforms 14, which can be reached via a ladder 16, with a hand-guided distribution hose 18 into the pre-assembled formwork 20 on the floor
22 geschlossen sind, eingebracht. Das Ausbringen des Betons über den Verteilerschlauch 18 erfolgt durch den Auslaß 24 einer Dekompressionspumpe 26, die an ihrem Einlaß 28 an ein Fallrohr 30 angeschlossen ist. Das Fallrohr 30 führt von übertage (Oberkante 31 des Schachts 12) im we- sentlichen senkrecht an einer der Schachtwände 10 nach unten und ist auf der Höhe der Unterkante der Dekompressionspumpe 26 zu dieser hin abge- bogen. Das Fallrohr 30 wird einlaßseitig über eine Füllpumpe 32 mit Beton beschickt, so daß sich im Fallrohr 30 eine Betonsäule bildet, die am Ende des Fallrohrs 30 unter hohem Druck am Einlaß 28 der Dekompressionspumpe ansteht.22 are closed. The delivery of the concrete via the distribution hose 18 takes place through the outlet 24 of a decompression pump 26 which is connected to a down pipe 30 at its inlet 28. The downpipe 30 leads from the surface (upper edge 31 of the shaft 12) essentially vertically downwards on one of the shaft walls 10 and is at the level of the lower edge of the decompression pump 26 towards it. arc. The downpipe 30 is charged with concrete on the inlet side via a filling pump 32, so that a concrete column forms in the downpipe 30, which is present at the end of the downpipe 30 under high pressure at the inlet 28 of the decompression pump.
Die Dekompressionspumpe 26 umfaßt eine als S-Rohr ausgebildete Rohrweiche 34, die in einem Pufferbehälter 36 um eine zur Einlaßöffnung 28 konzentrische vertikale Achse 38 mit Hilfe eines Hydraulikantriebs 40 schwenkbar gelagert ist. An der Oberseite des Pufferbehälters 36 sind zwei Förderzylinder 42 senkrecht angeordnet, die mit ihren nach unten weisende Öffnungen 44 in den Pufferbehälter 36 münden und deren nicht dargestellte Kolben mit Hilfe jeweils eines Hydrozylinders 46, deren Kolben stangenseitig durch einen Wasserkasten 47 hindurch, im Gegentakt antreibbar sind. Die Rohrweiche 34 wird über den Hydraulikantrieb 40 synchron mit den Hydro- zylindem 46 angetrieben, so daß die Austrittsöffnung 48 der Rohrweiche 44 abwechselnd vor eine der Zylinderöffnungen gelangt, während die jeweils andere Zylinderöffnung 44 frei nach unten in den Pufferbehälter weist. Das Hydraulikaggregat 54 zur Speisung des Hydraulikantriebs 40 und der Hydro- zylinder 46 befindet sich auf einer der Plattformen 14 in der Nähe der De- kompressionspumpe 26. Die Rohrweiche 34 wird jeweils bei nach unten gefahrenem Kolben in einem der Zylinder 42 vor die betreffende Zylinderöffnung 44 geschaltet, so daß sich die unter Druck stehende Betonsäule durch die Rohrweiche 34 hindurch gegen den betreffenden Kolben abstützt. Beim Rückzug des Kolbens dringt die nachrückende Betonsäule in den betreffen- den Zylinder 42 ein, bis der Kolben seine obere Endlage erreicht. Sodann wird die Rohrweiche zum anderen Zylinder umgeschaltet, dessen Kolben in seiner unteren Endlage befindet. Gleichzeitig wird der erste Zylinder zum Pufferbehälter 46 hin geöffnet, so daß die darin befindliche Betonportion über den im Pufferbehälter 46 herrschenden Atmosphärendruck druckfrei gestellt wird und bei Vorschub des betreffenden Kolbens in den Pufferbehälter 36 gelangt. Vom Pufferbehälter 36 aus fällt der Beton durch den Aus- laß 24 in den Verteilerschlauch 18 und wird von dort aus im freien Fall zur Applikationsstelle in den Schalungen 20 geleitet.The decompression pump 26 comprises a tube switch 34 designed as an S-tube, which is pivotably mounted in a buffer tank 36 about a vertical axis 38 concentric with the inlet opening 28 by means of a hydraulic drive 40. At the top of the buffer tank 36, two feed cylinders 42 are arranged vertically, which open into the buffer tank 36 with their downward-facing openings 44 and whose pistons, not shown, can be driven in push-pull with the aid of a hydraulic cylinder 46, the piston of which on the rod side through a water tank 47 are. The pipe switch 34 is driven synchronously with the hydraulic cylinders 46 via the hydraulic drive 40, so that the outlet opening 48 of the pipe switch 44 alternately reaches one of the cylinder openings, while the other cylinder opening 44 points freely downward into the buffer container. The hydraulic unit 54 for supplying the hydraulic drive 40 and the hydraulic cylinder 46 is located on one of the platforms 14 in the vicinity of the decompression pump 26. The pipe switch 34 is in front of the relevant cylinder opening 44 in each of the cylinders 42 when the piston is lowered switched so that the pressurized concrete column is supported through the pipe switch 34 against the piston in question. When the piston is retracted, the advancing concrete column penetrates into the relevant cylinder 42 until the piston reaches its upper end position. Then the switch is switched to the other cylinder, the piston of which is in its lower end position. At the same time, the first cylinder is opened toward the buffer container 46 so that the portion of concrete therein is depressurized via the atmospheric pressure prevailing in the buffer container 46 and reaches the buffer container 36 when the piston in question is advanced. From the buffer tank 36, the concrete falls through the leave 24 in the distribution hose 18 and from there is passed in free fall to the application point in the formwork 20.
Der Pufferbehälter 36 ist mit einem seitlichen Deckel 50 versehen, der zu Wartungszwecken geöffnet werden kann. Zuvor wird das Fallrohr 30 zweckmäßig durch einen Schieber 52 gesperrt, um die Rohrweiche 34 druckfrei zu stellen.The buffer container 36 is provided with a side cover 50 which can be opened for maintenance purposes. Prior to this, the downpipe 30 is expediently blocked by a slide 52 in order to make the pipe switch 34 free of pressure.
Um das Fallrohr 30 zerstörungsfrei befüllen zu können, ist zusätzlich eine Wasserleitung 56 vorgesehen, die im Bereich des Schiebers 42 und im unteren Bogenbereich des Fallrohrs 30 mit dem Fallrohr 30 kommuniziert. Zunächst wird bei geschlossenem Schieber 52 das Fallrohr 30 über die Wasserleitung 56 bis oben hin gefüllt. Sodann wird bei noch geschlossenem Schieber 52 über die Fülipumpe 32 unter Zwischenlage mindestens eines Dichtelements Beton in das Fallrohr 30 eingefüllt und das dort befindliche Wasser über die Leitung 56 nach dem Prinzip der kommunizierenden Röhren nach oben verdrängt. Sobald die Betonsäule in der Nähe des Schiebers 52 angelangt ist, wird dieser geöffnet, so daß das im unteren Bereich befindliche Wasser über die nachrückende Betonsäule über den unteren Abschnitt der Wasserleitung 56 verdrängt werden kann und die Betonsäule schließlich über den Pumpeneinlaß 28 in die Rohrweiche 34 eindringt. Hierzu muß dann die Dekompressionspumpe 26 über den Hydraulikantrieb 40 und die Hydro- zylinder 46 in Gang gesetzt werden.In order to be able to fill the downpipe 30 non-destructively, a water line 56 is additionally provided which communicates with the downpipe 30 in the area of the slide 42 and in the lower arc area of the downpipe 30. First, with the slide 52 closed, the downpipe 30 is filled up to the top via the water line 56. Then, with the slide 52 still closed, concrete is poured into the downpipe 30 via the filling pump 32 with the interposition of at least one sealing element, and the water located there is displaced upwards via the line 56 according to the principle of the communicating tubes. As soon as the concrete column has reached the slide 52, the latter is opened so that the water located in the lower region can be displaced via the advancing concrete column via the lower section of the water line 56 and the concrete column finally via the pump inlet 28 into the pipe switch 34 penetrates. For this purpose, the decompression pump 26 must then be started via the hydraulic drive 40 and the hydraulic cylinders 46.
Die Reinigung der Anlage erfolgt über eine Wassersäule, die von übertage aus unter Zwischenlage eines Reinigungsmolches bei abgeschalteter Füllpumpe 32 in das Fallrohr eingebracht wird. Es reichen dazu etwa 20 m Wassersäule, die bei fortgesetztem Betrieb der Dekompressionspumpe 26 allmählich bis in den Pufferbehälter 36 hinein nachrückt. Zusammenfassend ist folgendes festzuhalten: Die Erfindung bezieht sich auf ein Verfahren und eine Anordnung zum Betonieren von vertikalen Schächten mit einer Tiefe von z.B. 500 m und mehr. Der Beton wird dort über eine in einem Fallrohr 30 befindliche Betonsäule zu einer tieferliegenden Applikati- onsstelle 20 gefördert. Um ein entmischungs- und zerstörungsfreies Betonieren zu gewährleisten, wird der Beton am ausgangsseitigen Ende des Fallrohrs 30 portionsweise aus der nachrückenden Betonsäule entnommen, von der Betonsäule abgetrennt und dabei drucklos gestellt und sodann der Applikationsstelle zugeführt. The system is cleaned by means of a water column which is introduced into the downpipe from above with the interposition of a cleaning pig with the filling pump 32 switched off. About 20 m of water are sufficient for this, which gradually moves into the buffer tank 36 as the decompression pump 26 continues to operate. In summary, the following can be stated: The invention relates to a method and an arrangement for concreting vertical shafts with a depth of, for example, 500 m and more. The concrete is conveyed there via a concrete column located in a downpipe 30 to a lower-lying application point 20. In order to ensure demixing and non-destructive concreting, the concrete at the outlet end of the downpipe 30 is removed in portions from the advancing concrete column, separated from the concrete column and depressurized and then fed to the application site.

Claims

Patentansprüche claims
1. Verfahren zum Betonieren von tiefen Schächten, bei welchem Beton über eine in einem Fallrohr (30) befindliche Betonsäule zu einer tieferliegenden Applikationsstelle (20) gefördert wird, dadurch gekennzeichnet, daß der Beton am ausgangsseitigen Ende des Fallrohrs (30) portionsweise aus der nachrückenden Betonsäule entnommen, von der Betonsäule abgetrennt und dabei drucklos gestellt wird und sodann der Applikationsstelle (20) zugeführt wird.1. A method for concreting deep shafts, in which concrete is conveyed via a concrete column located in a downpipe (30) to a lower-lying application point (20), characterized in that the concrete at the outlet end of the downpipe (30) in portions from the advancing one The concrete column is removed, separated from the concrete column and depressurized, and then fed to the application site (20).
2. Verfahren nach Anspruch 1 , dadurch gekennzeichnet, daß die Betonsäule einer Dekompressionspumpe (26) zugeleitet, dort portionsweise drucklos gestellt und sodann der Applikationsstelle (20) zugeführt wird.2. The method according to claim 1, characterized in that the concrete column is fed to a decompression pump (26), depressurized there in portions and then fed to the application site (20).
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Betonsäule am ausgangsseitigen Ende des Fallrohrs (30) in einen Zylinder (42) geleitet und dort von einem unter Vergrößerung des Zylindervolumens zurückweichenden Kolben abgestützt wird, daß der Zylinderinhalt nach Erreichen einer Kolbenendlage von der übrigen Beton- säule abgetrennt und danach vorzugsweise unter Vorschub des Kolbens aus dem Zylinder (42) mittelbar oder unmittelbar zur Applikationsstelle (20) ausgetragen wird.3. The method according to claim 1 or 2, characterized in that the concrete column at the outlet end of the down pipe (30) is passed into a cylinder (42) and is supported there by a piston receding while increasing the cylinder volume, that the cylinder content after reaching a piston end position is separated from the rest of the concrete column and is then discharged from the cylinder (42) indirectly or directly to the application site (20), preferably with the piston advancing.
4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Beton aus dem Zylinder (42) in einen Pufferbehälter (36) geleitet und von dort zur Applikationsstelle (20) ausgetragen wird.4. The method according to claim 3, characterized in that the concrete is passed from the cylinder (42) into a buffer container (36) and discharged from there to the application point (20).
5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der drucklos gestellte Beton über eine weitere Fallstrecke, die kürzer als die Betonsäule ist, der Applikationsstelle zugeleitet wird. 5. The method according to any one of claims 1 to 4, characterized in that the depressurized concrete is fed to the application point over a further drop distance that is shorter than the concrete column.
6. Verfahren nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die nachrückende Betonsäule am austrittsseitigen Ende des Fallrohrs (30) in den nach oben weisenden, nach unten offenen Zylinder (42) geleitet wird und daß die von der Betonsäule abgetrennten Betonportionen vom Zylinder (42) aus nach unten ausgetragen werden.6. The method according to any one of claims 3 to 5, characterized in that the advancing concrete column at the outlet end of the downpipe (30) in the upward-pointing, downwardly open cylinder (42) is passed and that the separated from the concrete column portions of Cylinder (42) are discharged downwards.
7. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die nachrückende Betonsäule am austrittsseitigen Ende des Fallrohrs (30) abwechselnd in zwei getrennte Zylinder eingeleitet, durch diese im Gegentakt portioniert und gegebenenfalls über den Pufferbehälter (36) zur Applikationsstelle ausgetragen wird.7. The method according to any one of claims 3 to 6, characterized in that the advancing concrete column at the outlet end of the down pipe (30) is alternately introduced into two separate cylinders, portioned by these in counter-clockwise motion and optionally discharged via the buffer container (36) to the application site ,
8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Fallrohr (30) zunächst mit Füllwasser gefüllt wird, bevor der Beton unter Zwischenlage mindestens eines Dichtelements in das8. The method according to any one of claims 1 to 7, characterized in that the downpipe (30) is initially filled with filling water before the concrete with the interposition of at least one sealing element in the
Fallrohr (30) eingeleitet wird und daß das austrittsseitig anfallende Füllwasser über ein mit dem Fallrohr (30) kommunizierendes Rückrohr (56) nach oben zurückgefördert oder in den Schacht verworfen wird.Down pipe (30) is introduced and that the fill water accumulating on the outlet side is conveyed back upwards via a return pipe (56) communicating with the down pipe (30) or is discarded into the shaft.
9. Anordnung zum Betonieren von tiefen Schächten, mit einer Füllpumpe (32) und einem an die Füllpumpe angeschlossenen Fallrohr (30), dadurch gekennzeichnet, daß das austrittsseitige Ende des Fallrohrs (30) an eine druckfeste Dekompressionspumpe (26) anschließbar ist, deren Auslaß (24) mit einer Applikationsstelle (20) verbindbar ist.9. Arrangement for concreting deep shafts, with a filling pump (32) and a downpipe connected to the filling pump (30), characterized in that the outlet-side end of the downpipe (30) can be connected to a pressure-resistant decompression pump (26), the outlet of which (24) can be connected to an application point (20).
10. Anordnung nach Anspruch 9, dadurch gekennzeichnet, daß an den Auslaß (24) ein zur Applikationsstelle (20) führender Verteilerschlauch (18) anschließbar ist.10. The arrangement according to claim 9, characterized in that a to the application point (20) leading distributor hose (18) can be connected to the outlet (24).
11. Anordnung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß die Dekompressionspumpe (26) eine eintrittsseitig mit dem Fallrohr (30) verbindbare Rohrweiche (34) aufweist, die austrittsseitig abwechselnd an einem von zwei Zylindern (42) anschließbar ist von denen der jeweils andere Zylinder (42) vorzugsweise über einen gemeinsamen Pufferbehälter (36) zum Auslaß (24) führt, wobei in den Zylindern (42) im Gegentakt hin- und herverschiebbare Kolben angeordnet sind.11. The arrangement according to claim 9 or 10, characterized in that the decompression pump (26) has an inlet side with the downpipe (30) Connectable pipe switch (34), which can be connected alternately on the outlet side to one of two cylinders (42), of which the other cylinder (42) preferably leads to the outlet (24) via a common buffer tank (36), with the cylinders (42 ) push-pull pistons are arranged in push-pull.
12. Anordnung nach Anspruch 11 , dadurch gekennzeichnet, daß die Rohrweiche (34) im Pufferbehälter (36) unter den nach unten offenen Zylindern (42) angeordnet ist und austrittsseitig in Richtung Zylinderöff- nungen (44) nach oben weist.12. The arrangement according to claim 11, characterized in that the pipe switch (34) in the buffer tank (36) is arranged under the downwardly open cylinders (42) and on the outlet side in the direction of the cylinder openings (44) points upwards.
13. Anordnung nach einem der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß der Auslaß (24) von der Dekompressionspumpe (24) aus nach unten weist.13. Arrangement according to one of claims 9 to 12, characterized in that the outlet (24) from the decompression pump (24) points downwards.
14. Anordnung nach einem der Ansprüche 9 bis 13, dadurch gekennzeichnet, daß in dem Fallrohr (30) vor der Dekompressionspumpe (26) ein Sperrschieber (52) angeordnet ist.14. Arrangement according to one of claims 9 to 13, characterized in that a locking slide (52) is arranged in the downpipe (30) before the decompression pump (26).
15. Anordnung nach einem der Ansprüche 9 bis 14, dadurch gekennzeichnet, daß das Fallrohr (30) vor der Dekompressionspumpe (26) an eine absperrbare Rücklaufleitung (56) vorzugsweise mit kleinerem Querschnitt als das Fallrohr (30) angeschlossen ist.15. Arrangement according to one of claims 9 to 14, characterized in that the down pipe (30) before the decompression pump (26) to a lockable return line (56) is preferably connected with a smaller cross section than the down pipe (30).
16. Anordnung nach Anspruch 15, dadurch gekennzeichnet, daß die16. The arrangement according to claim 15, characterized in that the
Rücklaufleitung (56) nach übertage geführt ist.Return line (56) is led to the surface.
17. Anordnung nach einem der Ansprüche 9 bis 16, gekennzeichnet durch eine Steuerungseinrichtung zur synchronisierten Ansteuerung der Füllpumpe (32) und der Dekompressionspumpe (26). 17. Arrangement according to one of claims 9 to 16, characterized by a control device for synchronized control of the filling pump (32) and the decompression pump (26).
18. Dekompressionspumpe zur Förderung von druckbelasteten Dickstoffen, insbesondere von Beton, zu einer Applikationsstelle (20) gekennzeichnet durch eine eintrittsseitig mit dem druckbelasteten Dickstoff beaufschlagbare Rohrweiche (34), die austrittsseitig abwechselnd an einen von zwei Zylindern (42) druckdicht anschließbar ist, von denen der jeweils andere Zylinder vorzugsweise über einen gemeinsamen Pufferbehälter (36) zu einem Auslaß (24) führt, wobei in den Zylindern zwei in Gegentakt hin- und herverschiebbare Kolben angeordnet sind.18. Decompression pump for conveying pressure-loaded thick matter, in particular concrete, to an application point (20) characterized by a pipe switch (34) which can be acted upon by the pressure-loaded thick matter on the inlet side and which can be connected pressure-tight alternately on the outlet side to one of two cylinders (42), one of which the other cylinder, preferably via a common buffer tank (36), leads to an outlet (24), two pistons which can be pushed back and forth in push-pull fashion are arranged in the cylinders.
19. Dekompressionspumpe nach Anspruch 18, dadurch gekennzeichnet, daß der Pufferbehälter (36) einen bodenseitigen, vorzugsweise nach unten weisenden Auslaßstutzen (24) aufweist.19. Decompression pump according to claim 18, characterized in that the buffer container (36) has a bottom-side, preferably downward-pointing outlet nozzle (24).
20. Dekompressionspumpe nach Anspruch 18 oder 19, dadurch gekenn- zeichnet, daß der Pufferbehälter (36) eine mit einem Deckel (50) druckdicht verschließbare Wartungsöffnung aufweist. 20. Decompression pump according to claim 18 or 19, characterized in that the buffer container (36) has a maintenance opening which can be closed in a pressure-tight manner with a cover (50).
EP00989859A 1999-12-08 2000-11-16 Method and arrangement for concreting vertical shafts Expired - Lifetime EP1235961B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19959217 1999-12-08
DE19959217A DE19959217A1 (en) 1999-12-08 1999-12-08 Method and arrangement for concreting vertical shafts
PCT/EP2000/011329 WO2001042570A1 (en) 1999-12-08 2000-11-16 Method and arrangement for concreting vertical shafts

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EP1235961A1 true EP1235961A1 (en) 2002-09-04
EP1235961B1 EP1235961B1 (en) 2003-10-01

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EP (1) EP1235961B1 (en)
AT (1) ATE251258T1 (en)
DE (2) DE19959217A1 (en)
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ATE251258T1 (en) 2003-10-15
WO2001042570A1 (en) 2001-06-14
US6776558B1 (en) 2004-08-17
DE50003946D1 (en) 2003-11-06
DE19959217A1 (en) 2001-06-13
EP1235961B1 (en) 2003-10-01
ES2206347T3 (en) 2004-05-16

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