EP1240398A1 - Sealed filling element and a method for introducing injectable media into cracks or cavities in concrete - Google Patents

Sealed filling element and a method for introducing injectable media into cracks or cavities in concrete

Info

Publication number
EP1240398A1
EP1240398A1 EP00991609A EP00991609A EP1240398A1 EP 1240398 A1 EP1240398 A1 EP 1240398A1 EP 00991609 A EP00991609 A EP 00991609A EP 00991609 A EP00991609 A EP 00991609A EP 1240398 A1 EP1240398 A1 EP 1240398A1
Authority
EP
European Patent Office
Prior art keywords
concrete
bore
hollow screw
packer
seal
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
EP00991609A
Other languages
German (de)
French (fr)
Other versions
EP1240398B1 (en
EP1240398B9 (en
Inventor
Ulrich Hettich
Stefan Hettich
Stefan Nagel
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.)
Ludwig Hettich and Co
Original Assignee
Ludwig Hettich and Co
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 Ludwig Hettich and Co filed Critical Ludwig Hettich and Co
Publication of EP1240398A1 publication Critical patent/EP1240398A1/en
Publication of EP1240398B1 publication Critical patent/EP1240398B1/en
Application granted granted Critical
Publication of EP1240398B9 publication Critical patent/EP1240398B9/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection

Definitions

  • the invention relates to a packer and a method for introducing injection media into cracks or cavities in concrete, stone or similar building materials with the features of the preambles of claims 1 and 8 respectively.
  • packers are used at the component / supply line interface for the injection medium, which serve to connect the supply lines to the cracks or cavities in the concrete components to be renovated.
  • FIG. 1 represents an axial section.
  • a tube 1 has a smooth section 2 and a threaded section 3.
  • a package of three metal disks 4 and two rubber sealing bushes 5 arranged between them is pushed.
  • the smooth section 2 is flanged with its free end around the circumferential inner edge of the lowermost disk 4 to form a collar 6, which holds the packet of disks 4 and sealing bushes 5 against displacement in an axial direction.
  • the package 4, 5 is held by a metal sleeve 7 which is pushed onto the tube 1 and can be clamped against the package 4, 5 by means of a nut 8 screwed onto the threaded section 3.
  • a nipple 10 for injecting an injection medium is screwed onto the free end of the threaded section 3 by means of a nut 9.
  • the packer 1 to 10 is inserted into a bore 12 in a concrete component 11 with the sealing bushes 5 not yet tightened. Then the nut 8 is tightened on the threaded portion 3 so that the sealing bushes 5 are pressed against the wall of the bore 12 with a pressing force sufficient to push the packer 1 to 10 in hold the bore 12 due to the generated wall friction against the compressive force which is exerted on the packer in the direction axially outward in order to avoid pressing the packer out of the bore 12 during operation.
  • the holding force for the packer is achieved exclusively via the frictional forces generated in the manner described between the sealing bushes 5 and the bore wall 12.
  • the injection pressures currently used are in the order of up to 300 bar.
  • the holding forces generated in the bore solely by friction depend, among other things, on the size of the coefficient of friction between the bore wall and the material of the sealing bushes. They can fluctuate in operation. Given the high injection pressures mentioned, it cannot always be ruled out that the packer will be blown out of the bore, which represents a safety risk for the personnel and can also damage the environment and the packer itself.
  • Such a packer is known from DE 94 14 703 Ul.
  • This packer is designed to be buried in a borehole.
  • the upper area of the borehole is widened so that the packer can be sunk with its connecting nipple and a hexagon nut used for tensioning.
  • a retaining washer provided under the hexagon nut lies on a shoulder between the expanded and the narrowed borehole area.
  • the invention has for its object to provide a packer and a method for introducing injection media under pressure into cracks or cavities in concrete, stone or similar building materials so that it can be securely anchored in the borehole, with a good, reliable seal between the packer and the borehole should be guaranteed when introducing injection media.
  • the tubular part is secured by anchoring in the borehole.
  • the compression of the sealing bush in the borehole therefore only needs to produce a sufficient sealing effect to be measured. Therefore, the packer and in particular the sealing bush can be made considerably more compact in the invention and the bore in the concrete component can be dimensioned smaller.
  • the packer Due to the form-fitting anchoring between the banjo bolt and the bore, especially by screwing the banjo bolt designed as a concrete screw directly into the concrete, the packer is securely held in the bore even at very high injection pressures, which means that the packer is pushed out or blown out Borehole wall makes impossible. This significantly increases security.
  • an adapter sleeve to be provided specifically in the known packer is unnecessary, so that the packer according to the invention has fewer components, which simplifies the construction.
  • the screw designed as a hollow screw is designed in its threaded section as well as a known concrete screw to allow a direct, i.e. ensure screwing into concrete without dowels.
  • a screw which can be screwed directly into concrete is protected in the applicant's European patent EP 0 623 759.
  • Figure 2a shows a pre-assembled packer according to the invention in side view
  • Figure 2b shows the pre-assembled packer according to Figure 2a, but completely cut
  • FIG. 3 shows an axial section through a pre-drilled borehole, dimensioned for receiving the packer according to FIG. 1, in a component made of concrete and
  • FIG. 4 shows a sectional illustration with a packer according to FIG. 1 inserted into the borehole according to FIG. 3.
  • the packer according to the invention has a concrete screw 20 with a head 21 and a threaded part 22 which cuts directly into concrete and a smooth-walled guide sleeve 23 of smaller diameter.
  • the head 21 designed as a hexagon contains a threaded hole into which a nipple 25 with a threaded pin 24 is screwed.
  • the threaded hole is located at the outer end of a through hole 26 through the concrete screw 20. This through hole 26 also continues through the guide sleeve 23 to the end of the injection at 27.
  • the guide sleeve 23 is a separate part from the concrete screw 20, which is pressed into the lower end of the through hole 26 of the concrete screw 20. Between the end 28 of the concrete screw 20 and a flanged collar 29 of the guide sleeve 23, a package of two metal disks 30 and a sealing bush 31 made of rubber-elastic material is held, which is slightly pretensioned by pressing the guide sleeve 23 into the through hole 26 in the concrete screw 20 is.
  • the packer preassembled in this way is screwed into a hole 32 suspected of being cracked or hollow in preparation for an injection into a hole 32 previously made in the concrete component, namely until the collar 29 of the guide sleeve 23 contacts a shoulder 33 of the hole 32. Since the guide sleeve 23 slides in the through hole 26 of the concrete screw under the axial force exerted by the concrete screw when screwing in, the package of the two disks 30 and the sealing bush 31 is compressed slightly in the last phase of the screwing-in process, so that this is shortened slightly Package the sealing bush is pressed against the bore wall to produce a sufficient seal. In contrast to the prior art (FIG.
  • the holding force between the packer and the component is therefore not determined by the frictional force between the sealing bush 31 and the bore wall 32, but by the form-fitting interaction of the external thread of the threaded part 22 of the concrete screw 20 with the internal thread generated thereby applied in the wall of the bore 32.
  • the packer according to the invention has fewer parts and can be dimensioned smaller than the packer according to the prior art shown in FIG. 1, which leads overall to a considerably shorter and more compact construction and to a smaller borehole diameter. Nevertheless, due to the positive connection with the borehole, the packer can transmit far higher holding forces in a positive manner, ie with a safety that is many times higher.
  • a packer according to the invention can be easily assembled in the manner described and also disassembled by unscrewing and used repeatedly. It is not a problem if, when the concrete screw 20 is unscrewed from the borehole 32, the guide sleeve 23 and the sealing bush remain in the bore. For reuse, a new guide sleeve 23 with a pushed-on package of sealing bush 31 and washers 30 is then only to be pressed into the through bore 26 of the concrete screw 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Piles And Underground Anchors (AREA)
  • Road Signs Or Road Markings (AREA)
  • Sealing Material Composition (AREA)

Abstract

The invention relates to a sealed filling element for introducing pressurised injectable media into cracks or cavities in concrete, stone, or similar construction materials by means of a hollow screw which is inserted into the crack or cavity via a bore in the concrete and is sealed by at least one deformable seal that is pressed against the wall of the bore. Said fitting is characterised in that the bore has at least one ledge, that the pipe part is configured as a hollow screw which can be anchored in the concrete and that the seal of the hollow screw presses against the ledge.

Description

Packer und Verfahren zum Einbringen von Injektionsmedien in Risse oder Hohlräume in Beton Packer and method for introducing injection media into cracks or voids in concrete
Die Erfindung betrifft einen Packer und ein Verfahren zum Einbringen von Injektionsmedien in Risse oder Hohlräume in Beton, Stein oder ähnlichen Baustoffen mit den Merkmalen der Oberbegriffe der Ansprüche 1 bzw. 8.8. The invention relates to a packer and a method for introducing injection media into cracks or cavities in concrete, stone or similar building materials with the features of the preambles of claims 1 and 8 respectively.
Zur Sanierung von gerissenen Betonbauteilen oder zur VerfuUung von Hohlräumen in den Betonbauteilen ist es bekannt, flüssige Injektionsmedien in das Bauteil einzupressen. Dabei werden an der Schnittstelle Bauteil/Zufuhrleitung für das Injektionsmedium sogenannte Pak- ker verwendet, die zum Verbinden der Zuführleitungen mit den Rissen oder Hohlräumen in den zu sanierenden Betonbauteilen dienen.For the renovation of cracked concrete components or for the provision of voids in the concrete components, it is known to press liquid injection media into the component. So-called packers are used at the component / supply line interface for the injection medium, which serve to connect the supply lines to the cracks or cavities in the concrete components to be renovated.
Ein üblicher bekannter Packer ist in Figur 1 beschrieben und nachfolgend anhand dieser einen Axialschnitt darstellenden Figur 1 erläutert. Ein Rohr 1 hat einen glatten Abschnitt 2 und einen Gewindeabschnitt 3. Auf dem glatten Abschnitt 2 ist ein Paket aus drei metallenen Scheiben 4 und zwei dazwischen angeordneten Dichtbuchsen 5 aus Gummi aufgeschoben. Der glatte Abschnitt 2 ist mit seinem freien Ende um die umlaufende Innenkante der untersten Scheibe 4 zu einem Kragen 6 umgebördelt, der das Paket aus den Scheiben 4 und Dichtbuchsen 5 gegen Verlagerung in einer axialen Richtung hält. In der axialen Gegenrichtung ist das Paket 4, 5 durch eine metallene Hülse 7 gehalten, die auf das Rohr 1 aufgeschoben und mittels einer auf den Gewindeabschnitt 3 aufgeschraubten Mutter 8 gegen das Paket 4, 5 verspannbar ist.A conventional known packer is described in FIG. 1 and explained below with reference to FIG. 1, which represents an axial section. A tube 1 has a smooth section 2 and a threaded section 3. On the smooth section 2, a package of three metal disks 4 and two rubber sealing bushes 5 arranged between them is pushed. The smooth section 2 is flanged with its free end around the circumferential inner edge of the lowermost disk 4 to form a collar 6, which holds the packet of disks 4 and sealing bushes 5 against displacement in an axial direction. In the axial opposite direction, the package 4, 5 is held by a metal sleeve 7 which is pushed onto the tube 1 and can be clamped against the package 4, 5 by means of a nut 8 screwed onto the threaded section 3.
Auf dem freien Ende des Gewindeabschnittes 3 ist mittels einer Mutter 9 ein Nippel 10 zum Injizieren eines Injektionsmediums aufgeschraubt.A nipple 10 for injecting an injection medium is screwed onto the free end of the threaded section 3 by means of a nut 9.
Der Packer 1 bis 10 wird in der gezeigten Konfiguration bei noch nicht verspannten Dichtbuchsen 5 in eine Bohrung 12 in einem Betonbauteil 11 eingesetzt. Dann wird die Mutter 8 aufgdem Gewindeabschnitt 3 angezogen, so daß die Dichtbuchsen 5 gegen die Wandung der Bohrung 12 mit einer Preßkraft gedrückt werden, die dazu ausreicht, den Packer 1 bis 10 in der Bohrung 12 aufgrund der erzeugten Wandreibung gegen die Druckkraft festzuhalten, welche über das Injektionsmedium in Richtung axial auswärts auf den Packer ausgeübt wird, um so ein Herausdrücken des Packers aus der Bohrung 12 im Betrieb zu vermeiden.In the configuration shown, the packer 1 to 10 is inserted into a bore 12 in a concrete component 11 with the sealing bushes 5 not yet tightened. Then the nut 8 is tightened on the threaded portion 3 so that the sealing bushes 5 are pressed against the wall of the bore 12 with a pressing force sufficient to push the packer 1 to 10 in hold the bore 12 due to the generated wall friction against the compressive force which is exerted on the packer in the direction axially outward in order to avoid pressing the packer out of the bore 12 during operation.
Folglich wird die Haltekraft für den Packer ausschließlich über auf die beschriebene Weise erzeugte Reibkräfte zwischen den Dichtbuchsen 5 und der Bohrungswandung 12 erzielt. Die derzeit verwendeten Iηjektionsdrücke liegen in der Größenordnung bis zu 300 bar. Die allein durch Reibung erzeugten Haltekräfte in der Bohrung hängen unter anderem von der Größe des Reibkoeffizienten zwischen der Bohrungswandung und dem Material der Dichtungsbuchsen ab. Sie können im Betrieb schwanken. Bei den erwähnten hohen Injektionsdrücken kann nicht immer ausgeschlossen werden, daß der Packer aus der Bohrung herausgesprengt wird, was ein Sicherheitsrisiko für das Personal darstellt und außerdem zu Schäden in der Umgebung und am Packer selbst führen kann.Consequently, the holding force for the packer is achieved exclusively via the frictional forces generated in the manner described between the sealing bushes 5 and the bore wall 12. The injection pressures currently used are in the order of up to 300 bar. The holding forces generated in the bore solely by friction depend, among other things, on the size of the coefficient of friction between the bore wall and the material of the sealing bushes. They can fluctuate in operation. Given the high injection pressures mentioned, it cannot always be ruled out that the packer will be blown out of the bore, which represents a safety risk for the personnel and can also damage the environment and the packer itself.
Ein derartiger Packer ist aus der DE 94 14 703 Ul bekannt. Dieser Packer ist für eine versenkte Anordnung im Bohrloch vorgesehen. Hierzu wird der obere Bereich des Bohrlochs aufgeweitet, so daß der Packer mit seinem Anschlußnippel und einer zum Verspannen dienenden Sechskantmutter versenkt eingebracht werden kann. Dabei liegt eine unter der Sechskantmutter vorgesehene Haltescheibe an einem Absatz zwischen dem aufgeweiteten und dem verengten Bohrlochbereich auf. Mit einer solchen Anordnung wird zwar vermieden, daß nach dem Injizieren überstehende Teile des Packers abgeschlagen werden müssen. Der Packer wird aber gegen die axial auswärts gerichtete Kraft beim Injizieren nur durch Reibkräfte gehalten, die zwischen der Bohrlochwandung und zwei Dichtbuchsen durch das Verspannen mittels der Sechskantmutter erzeugt werden.Such a packer is known from DE 94 14 703 Ul. This packer is designed to be buried in a borehole. For this purpose, the upper area of the borehole is widened so that the packer can be sunk with its connecting nipple and a hexagon nut used for tensioning. In this case, a retaining washer provided under the hexagon nut lies on a shoulder between the expanded and the narrowed borehole area. With such an arrangement it is avoided that protruding parts of the packer have to be knocked off after the injection. However, the packer is held against the axially outward force when injecting only by frictional forces which are generated between the borehole wall and two sealing bushes by the tensioning by means of the hexagon nut.
Der Erfindung liegt die Aufgabe zugrunde, einen Packer und ein Verfahren zum Einbringen von Injektionsmedien unter Druck in Risse oder Hohlräume in Beton, Stein oder ähnlichen Baustoffen so auszubilden, daß er im Bohrloch sicher verankerbar ist, wobei eine gute, zuverlässige Addichtung zwischen dem Packer und dem Bohrloch beim Einbringen von Injektionsmedien gewährleistet sein soll. Diese Aufgabe ist durch Anspruch 1 bzw. 8 gelöst.The invention has for its object to provide a packer and a method for introducing injection media under pressure into cracks or cavities in concrete, stone or similar building materials so that it can be securely anchored in the borehole, with a good, reliable seal between the packer and the borehole should be guaranteed when introducing injection media. This object is solved by claims 1 and 8, respectively.
Bei einem Packer und einem Verfahren nach der Erfindung wird das Rohrteil durch formschlüssiges Verankern in dem Bohrloch gesichert. Die Verpressung der Dichtbuchse im Bohrloch braucht deshalb lediglich noch zur Erzeugung einer ausreichenden Dichtwirkung bemessen zu sein. Deshalb kann der Packer und insbesondere die Dichtbuchse bei der Erfindung erheblich kompakter ausgeführt werden und die Bohrung im Betonbauteil kann kleiner bemessen werden.In a packer and a method according to the invention, the tubular part is secured by anchoring in the borehole. The compression of the sealing bush in the borehole therefore only needs to produce a sufficient sealing effect to be measured. Therefore, the packer and in particular the sealing bush can be made considerably more compact in the invention and the bore in the concrete component can be dimensioned smaller.
Aufgrund der formschlüssigen Verankerung zwischen der Hohlschraube und der Bohrung, insbesondere durch direktes Einschrauben der als Betonschraube ausgebildeten Hohlschraube in den Beton, ist selbst bei sehr hohen Injektionsdrücken ein sicherer Halt des Packers in der Bohrung gewährleistet, was ein Herausdrücken bzw. Heraussprengen des Packers aus der Bohrlochwandung unmöglich macht. Dadurch ist die Sicherheit entscheidend erhöht. Außerdem ist eine eigens bei dem bekannten Packer vorzusehende Spannhülse mit Mutter entbehrlich, so daß der Packer gemäß der Erfindung weniger Bauteile hat, was die Konstruktion vereinfacht.Due to the form-fitting anchoring between the banjo bolt and the bore, especially by screwing the banjo bolt designed as a concrete screw directly into the concrete, the packer is securely held in the bore even at very high injection pressures, which means that the packer is pushed out or blown out Borehole wall makes impossible. This significantly increases security. In addition, an adapter sleeve to be provided specifically in the known packer is unnecessary, so that the packer according to the invention has fewer components, which simplifies the construction.
Es ist bevorzugt, wenn die als Hohlschraube ausgebildete Schraube in ihrem Gewindeabschnitt ebenso ausgebildet wird wie eine bekannte Betonschraube, um ein direktes, d.h. dübelloses Einschrauben in Beton sicherzustellen. Eine solche direkt in Beton einschraubbare Schraube ist im europäischen Patent EP 0 623 759 der Anmelderin unter Schutz gestellt.It is preferred if the screw designed as a hollow screw is designed in its threaded section as well as a known concrete screw to allow a direct, i.e. ensure screwing into concrete without dowels. Such a screw which can be screwed directly into concrete is protected in the applicant's European patent EP 0 623 759.
Weitere vorteilhafte Einzelheiten der Erfindung sind in den Unteransprüchen unter Schutz gestellt.Further advantageous details of the invention are protected in the subclaims.
Die Erfindung ist im folgenden anhand schematischer Zeichnungen mit weiteren Einzelheiten näher erläutert. Es zeigen:The invention is explained in more detail below with the aid of schematic drawings. Show it:
Figur 2a einen vormontierten Packer gemäß der Erfindung in Seitenansicht;Figure 2a shows a pre-assembled packer according to the invention in side view;
Figur 2b den vormontierten Packer gemäß Figur 2a, jedoch vollständig geschnitten;Figure 2b shows the pre-assembled packer according to Figure 2a, but completely cut;
Figur 3 einen Axialschnitt durch ein vorgebohrtes, zur Aufnahme des Packers nach Figur 1 bemessenes Bohrloch in einem zu sanierenden Bauteil aus Beton und3 shows an axial section through a pre-drilled borehole, dimensioned for receiving the packer according to FIG. 1, in a component made of concrete and
Figur 4 eine Schnittdarstellung mit einem in das Bohrloch nach Figur 3 eingesetzten Pak- ker gemäß Figur 1. Der Packer gemäß der Erfindung weist eine Betonschraube 20 mit einem Kopf 21 und einem mit direkt in Beton schneidenden Gewindeteil 22 sowie einer glattwandigen Führungshülse 23 kleineren Durchmessers auf. Der als Sechskant ausgebildete Kopf 21 enthält ein Gewindeloch, in welches ein Nippel 25 mit Gewindezapfen 24 eingeschraubt ist. Das Gewindeloch befindet sich am äußeren Ende einer Durchgangsbohrung 26 durch die Betonschraube 20. Diese Durchgangsbohrung 26 setzt sich auch durch die Führungshülse 23 hindurch bis zum Injektionsende bei 27 fort.FIG. 4 shows a sectional illustration with a packer according to FIG. 1 inserted into the borehole according to FIG. 3. The packer according to the invention has a concrete screw 20 with a head 21 and a threaded part 22 which cuts directly into concrete and a smooth-walled guide sleeve 23 of smaller diameter. The head 21 designed as a hexagon contains a threaded hole into which a nipple 25 with a threaded pin 24 is screwed. The threaded hole is located at the outer end of a through hole 26 through the concrete screw 20. This through hole 26 also continues through the guide sleeve 23 to the end of the injection at 27.
Die Führungshülse 23 ist bei dem gezeigten Ausführungsbeispiel ein von der Betonschraube 20 gesondertes Teil, welches in das untere Ende der Durchgangsbohrung 26 der Betonschraube 20 eingepreßt ist. Zwischen dem Ende 28 der Betonschraube 20 und einem umgebördelten Kragen 29 der Führungshülse 23 ist ein Paket aus zwei Metallscheiben 30 und einer Dichtbuchse 31 aus gummielastischem Material gehalten, das durch das Eindrücken der Führungs- hülse 23 in die Durchgangsbohrung 26 in der Betonschraube 20 leicht vorgespannt ist.In the exemplary embodiment shown, the guide sleeve 23 is a separate part from the concrete screw 20, which is pressed into the lower end of the through hole 26 of the concrete screw 20. Between the end 28 of the concrete screw 20 and a flanged collar 29 of the guide sleeve 23, a package of two metal disks 30 and a sealing bush 31 made of rubber-elastic material is held, which is slightly pretensioned by pressing the guide sleeve 23 into the through hole 26 in the concrete screw 20 is.
Der so vormontierte Packer wird zur Vorbereitung einer Injektion in eine vorher in das Betonbauteil eingebrachte Bohrung 32 an einer Riss- oder hohlraumverdächtigen Stelle eingeschraubt, und zwar so tief, bis der Kragen 29 der Führungshülse 23 an einem Absatz 33 der Bohrung 32 anläuft. Da die Führungshülse 23 in der Durchgangsbohrung 26 der Betonschraube unter der von der Betonschraube beim Einschrauben ausgeübten Axialkraft gleitet, wird in der letzten Phase des Einschraubvorganges das Paket aus den beiden Scheiben 30 und der Dichtbuchse 31 geringfügig zusammengedrückt, so daß unter geringfügiger Verkürzung der Länge dieses Paketes die Dichtbuchse zur Erzeugung einer ausreichenden Abdichtung an die Bohrungswandung angepresst wird. Die Haltekraft zwischen dem Packer und dem Bauteil wird also anders als beim Stand der Technik (Fig. 1) nicht durch die Reibkraft zwischen Dichtbuchse 31 und Bohrungswandung 32, sondern durch das formschlüssige Zusammenwirken des Außengewindes des Gewindeteils 22 der Betonschraube 20 mit dem dadurch erzeugten Innengewinde in der Wand der Bohrung 32 aufgebracht.The packer preassembled in this way is screwed into a hole 32 suspected of being cracked or hollow in preparation for an injection into a hole 32 previously made in the concrete component, namely until the collar 29 of the guide sleeve 23 contacts a shoulder 33 of the hole 32. Since the guide sleeve 23 slides in the through hole 26 of the concrete screw under the axial force exerted by the concrete screw when screwing in, the package of the two disks 30 and the sealing bush 31 is compressed slightly in the last phase of the screwing-in process, so that this is shortened slightly Package the sealing bush is pressed against the bore wall to produce a sufficient seal. In contrast to the prior art (FIG. 1), the holding force between the packer and the component is therefore not determined by the frictional force between the sealing bush 31 and the bore wall 32, but by the form-fitting interaction of the external thread of the threaded part 22 of the concrete screw 20 with the internal thread generated thereby applied in the wall of the bore 32.
Der Packer nach der Erfindung hat weniger Teile und kann kleiner bemessen sein als der in Figur 1 gezeigte Packer nach dem Stand der Technik, was insgesamt zu einer erheblich kürzeren und kompakteren Konstruktion sowie zu einem kleineren Bohrlochdurchmesser fuhrt. Dennoch kann der Packer aufgrund der formschlüssigen Verbindung mit dem Bohrloch weit höhere Haltekräfte formschlüssig, d.h. mit um ein Vielfaches erhöhter Sicherheit, übertragen. Ein Packer gemäß der Erfindung läßt sich in der beschriebenen Weise einfach montieren und durch Herausschrauben auch wieder demontieren und mehrfach verwenden. Dabei stellt es kein Problem dar, wenn beim Herausschrauben der Betonschraube 20 aus dem Bohrloch 32 die Führungshülse 23 samt Dichtbuchse in der Bohrung verbleibt. Zur Wiederverwendung ist dann lediglich eine neue Führungshülse 23 mit aufgeschobenem Paket aus Dichtbuchse 31 und Scheiben 30 in die Durchgangsbohrung 26 der Betonschraube 20 einzudrücken. The packer according to the invention has fewer parts and can be dimensioned smaller than the packer according to the prior art shown in FIG. 1, which leads overall to a considerably shorter and more compact construction and to a smaller borehole diameter. Nevertheless, due to the positive connection with the borehole, the packer can transmit far higher holding forces in a positive manner, ie with a safety that is many times higher. A packer according to the invention can be easily assembled in the manner described and also disassembled by unscrewing and used repeatedly. It is not a problem if, when the concrete screw 20 is unscrewed from the borehole 32, the guide sleeve 23 and the sealing bush remain in the bore. For reuse, a new guide sleeve 23 with a pushed-on package of sealing bush 31 and washers 30 is then only to be pressed into the through bore 26 of the concrete screw 20.

Claims

Patentansprüche claims
1. Packer zum Einbringen von Injektionsmedien unter Druck in Risse oder Hohlräume in Beton, Stein oder ähnlichen Baustoffen durch ein Rohrteil, welches in einer mindestens einen Absatz (33) aufweisenden Bohrung (32) im Beton an den Riss oder Hohlraum angesetzt und durch mindestens eine verformbare Dichtung (31) abgedichtet ist, die gegen die Bohrungswandung verpresst ist, dadurch gekennzeichnet, daß das Rohrteil als im Beton verankerbare Hohlschraube (20) ausgebildet ist und daß die Dichtung (31) von der Hohlschraube (20) gegen den Absatz (33) gepresst ist.1.Packer for introducing injection media under pressure into cracks or cavities in concrete, stone or similar building materials through a pipe part which is attached to the crack or cavity in at least one step (33) having a bore (32) in the concrete and by at least one deformable seal (31) is sealed, which is pressed against the bore wall, characterized in that the tubular part is designed as a hollow screw (20) which can be anchored in the concrete and that the seal (31) from the hollow screw (20) against the shoulder (33) is pressed.
2. Packer nach Anspruch 1, dadurch gekennzeichnet, daß die Hohlschraube (20) als direkt in den Beton einschraubbare Betonschraube ausgebildet ist.2. Packer according to claim 1, characterized in that the hollow screw (20) is designed as a concrete screw which can be screwed directly into the concrete.
3. Packer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Hohlschraube (20) am Kopf (21) mit einem Nippel (25) für Injektionsmedium versehen ist.3. Packer according to claim 1 or 2, characterized in that the hollow screw (20) on the head (21) is provided with a nipple (25) for the injection medium.
4. Packer nach einem der Ansprüche 1 bis 3, dadurch gekennzei chnet, daß die Hohlschraube (20) am Injektionsende einen glatten Führungsabschnitt (23) zur Zentrierung und Führung der als Dichtbuchse (31 ) ausgebildeten Dichtung aufweist.4. Packer according to one of claims 1 to 3, characterized in that the hollow screw (20) at the injection end has a smooth guide section (23) for centering and guiding the seal designed as a sealing bush (31).
5. Packer nach Anspruch 4, dadurch gekennzeichnet, daß der Führungsabschnitt als gesonderte, in eine Durchgangsbohrung (26) der Hohlschraube (20) eindrückbare Führungshülse (23) ausgebildet ist.5. Packer according to claim 4, characterized in that the guide section is designed as a separate, in a through hole (26) of the hollow screw (20) which can be pressed in guide sleeve (23).
6. Packer nach Anspruch 5, dadurch gekennzeichnet, daß die Dichtungsbuchse (31) zwischen der Hohlschraube und einem umgebördelten Kragen (29) der Führungshülse (23) zum Erzeugen eines gewünschten Dichtdruckes gegenüber der Bohrlochwandung verpressbar ist.6. Packer according to claim 5, characterized in that the sealing bush (31) between the banjo bolt and a flanged collar (29) of the guide sleeve (23) for generating a desired sealing pressure against the borehole wall can be pressed.
7. Packer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Bohrung (32) mehrfach abgestuft ist.7. Packer according to one of claims 1 to 6, characterized in that the bore (32) is stepped several times.
8. Verfahren zum Einbringen von Injektionsmedien in Risse oder Hohlräume in Beton, Stein oder ähnlichen Baustoff durch ein Rohrteil, welches in einer mit mindestens einem Absatz (33) hergestellten und damit abgestuften Bohrung (32) im Beton an den Hohlraum oder Riss angesetzt und durch mindestens eine verformbare Dichtung (31) in der Bohrung abgedichtet wird, die gegen die Bohrungswandung gepresst wird, dadurch gekennzeichnet, daß das Rohrteil als im Beton mechanisch verankerbare Hohlschraube (20) bereitgestellt wird und daß die Dichtung (31) durch Einschrauben der Hohlschraube (20) in die Bohrung (32) gegen den Absatz (33) zum Erzeugen eines gewünschten Dichtdruckes gegenüber der Bohrlochwandung gepresst wird. 8. A method for introducing injection media into cracks or cavities in concrete, stone or similar building material by means of a pipe part which is attached to the cavity or crack in a concrete with a step (33) and thus graduated hole (32) in the concrete or crack at least one deformable seal (31) is sealed in the bore, which is pressed against the bore wall, characterized in that the tubular part is provided as a hollow screw (20) which can be mechanically anchored in the concrete and in that the seal (31) is screwed into the bore (32) by screwing the hollow screw (20) is pressed against the shoulder (33) to generate a desired sealing pressure against the borehole wall.
EP00991609A 1999-12-20 2000-12-18 Sealed filling element and a method for introducing injectable media into cracks or cavities in concrete Expired - Lifetime EP1240398B9 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19961553 1999-12-20
DE19961553A DE19961553C1 (en) 1999-12-20 1999-12-20 Packer to bring injected medium under pressure into cracks or cavities in stone or concrete; has hollow screw forming tube part for medium pressed against seal fitted against shoulder in borehole wall
PCT/EP2000/012914 WO2001046539A1 (en) 1999-12-20 2000-12-18 Sealed filling element and a method for introducing injectable media into cracks or cavities in concrete

Publications (3)

Publication Number Publication Date
EP1240398A1 true EP1240398A1 (en) 2002-09-18
EP1240398B1 EP1240398B1 (en) 2005-09-07
EP1240398B9 EP1240398B9 (en) 2006-10-11

Family

ID=7933477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991609A Expired - Lifetime EP1240398B9 (en) 1999-12-20 2000-12-18 Sealed filling element and a method for introducing injectable media into cracks or cavities in concrete

Country Status (5)

Country Link
EP (1) EP1240398B9 (en)
AT (1) ATE304101T1 (en)
AU (1) AU3364301A (en)
DE (2) DE19961553C1 (en)
WO (1) WO2001046539A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018857A1 (en) * 2006-04-24 2007-11-08 Köster Bauchemie AG Packer and device for setting the same and introducing injection material under pressure in a crack, a defect and the like in a component or a building and slotted expansion sleeve for selbigen
JP6213070B2 (en) * 2013-08-30 2017-10-18 株式会社大林組 Water supply method
JP6341904B2 (en) * 2015-12-28 2018-06-13 東海旅客鉄道株式会社 Concrete base material repair method, injection unit
CN116086533A (en) * 2023-01-10 2023-05-09 广州大学 Self-repairing function concrete structure health monitoring system and method

Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
FR953996A (en) * 1947-09-18 1949-12-16 Improvements made to crack sealing processes that may occur in masonry structures
AU563462B2 (en) * 1983-03-29 1987-07-09 Foundation Technology (Aust.) Pty. Ltd. Epoxy resin injection system for crack repair
DE8816578U1 (en) * 1988-12-07 1989-12-07 Rausch Bautenschutz, 6414 Hilders, De
DE3902925A1 (en) * 1989-02-01 1990-08-02 Fischer Artur Werke Gmbh INJECTION PACKER FOR INJECTING MINERAL BINDING AGENT IN COMPONENTS
EP0623759B1 (en) * 1993-05-04 1995-03-01 LUDWIG HETTICH SCHRAUBENFABRIK GmbH & Co. Thread forming screw
DE9414703U1 (en) * 1994-06-07 1995-07-13 Olson Marek Injection dowels
DE29819813U1 (en) * 1998-11-05 2000-03-09 Hettich & Co Tapping screw

Non-Patent Citations (1)

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Title
See references of WO0146539A1 *

Also Published As

Publication number Publication date
DE19961553C1 (en) 2001-06-13
WO2001046539A1 (en) 2001-06-28
ATE304101T1 (en) 2005-09-15
AU3364301A (en) 2001-07-03
EP1240398B1 (en) 2005-09-07
EP1240398B9 (en) 2006-10-11
DE50011133D1 (en) 2005-10-13

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