EP2192261B1 - Method for anchoring an attachment element - Google Patents

Method for anchoring an attachment element Download PDF

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Publication number
EP2192261B1
EP2192261B1 EP09175875.5A EP09175875A EP2192261B1 EP 2192261 B1 EP2192261 B1 EP 2192261B1 EP 09175875 A EP09175875 A EP 09175875A EP 2192261 B1 EP2192261 B1 EP 2192261B1
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Prior art keywords
borehole
drilling
self
hollow drill
drill
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EP09175875.5A
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German (de)
French (fr)
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EP2192261A1 (en
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Andreas Schell
Klaus-Peter Bohn
Till Cramer
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Hilti AG
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Hilti AG
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
    • E21B21/015—Means engaging the bore entrance, e.g. hoods for collecting dust
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/003—Machines for drilling anchor holes and setting anchor bolts
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/03—Processes

Definitions

  • a through hole cleaning method with a hollow drill is known in which air is blown through the hollow drill into the borehole during the drilling of the borehole. Accumulating drill cuttings and drill dust are thereby blown out of the borehole, which can pollute the environment of the borehole.
  • the desired tensile loads in the range of more than 1000 Newtons are transferred from the self-hardening mortar only to the component when the drill dust is removed cleanly.
  • smooth borehole walls made by sawing or grinding tend to be very easy to clean by suction, but still do not allow sufficient adhesion of the mortar to the boring wall.
  • a partially chiselling tool, the beating hollow drill probably leads to sufficient roughness and cracks in the borehole wall, so that the mortar sticks.
  • the self-hardening mortar is introduced as two components in the borehole.
  • the self-hardening mortar may be based on an epoxy resin and / or and / or polymethacrylate.
  • the fastener anchored in the self-hardening mortar is designed for tensile loads of at least 1000 Newton
  • the hollow drill 12 comprises a shaft 16 having at a first, front end a drill head 13 with outlet openings 14 and at the other, rear end a spigot 15 for mounting the hollow drill 12 in a tool holder 8 of a not shown beating and rotating drill.
  • a radially outwardly open inlet opening 17 is provided, which is connected via a circumferentially closed, provided in the shaft 16 longitudinal channel 18 with the outlet openings 14 on the drill head 13 in connection.
  • the suction hood 21 is bell-shaped and has a passage opening 22 for the hollow drill 12 and a connecting piece 23 for connecting a suction line 27 as a connection to the vacuum source 26.
  • the passage opening 22 may with a sealing device, such as. B. radially inwardly projecting brush elements or flexible sealing elements, for partial sealing of the passage opening 22 may be provided.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Verankern eines Befestigungselements und ein Verfahren zum Erstellen eines gereinigten Bohrlochs für ein Verankern eines Befestigungselements.The invention relates to a method for anchoring a fastening element and to a method for creating a cleaned borehole for anchoring a fastening element.

Bei einer chemischen Verankerung werden Befestigungselemente, wie beispielsweise Gewindestangen, Bewehrungseisen oder Dübel, mittels einer aushärtbaren Masse in einem zuvor in einem Bauteil, wie z. B. einer Wand oder einer Decke beispielsweise aus einem mineralischen Material, wie z. B. Beton oder Mauerwerk, erstellten Bohrloch verankert. Um dabei hohe Verankerungswerte des Befestigungselementes im Untergrund beziehungsweise im Bauteil erreichen zu können, ist eine vorzugsweise vollständige Reinigung des Bohrlochs wesentlich, da noch im Bohrloch befindliches Bohrklein oder Bohrmehl die Haftung der aushärtbaren Masse an der Wandung des Bohrlochs nachteilig beeinflusst.In a chemical anchoring fasteners, such as threaded rods, reinforcing rods or dowels, by means of a curable composition in a previously in a component such. B. a wall or a ceiling, for example, of a mineral material such. As concrete or masonry, established borehole anchored. In order to be able to achieve high anchoring values of the fastening element in the substrate or in the component, a preferably complete cleaning of the borehole is essential since drill cuttings or drill dust still located in the borehole adversely affect the adhesion of the hardenable mass to the wall of the borehole.

Zur Reinigung des Bohrlochs wurden bereits mechanische Vorrichtungen vorgeschlagen, mit denen nach dem Bohren das Bohrloch ausgebürstet oder ausgeblasen wird. Nachteilig an den bekannten Lösungen ist, dass der Grad der Reinigung von der Sorgfalt des Anwenders abhängt.For cleaning the well, mechanical devices have already been proposed with which the well is brushed or blown out after drilling. A disadvantage of the known solutions is that the degree of cleaning depends on the care of the user.

Aus der DE 29 12 396 A1 ist ein Bohrloch-Reinigungsverfahren mit einem Hohlbohrer bekannt, bei dem während dem Bohren des Bohrlochs Luft durch den Hohlbohrer in das Bohrloch geblasen wird. Anfallendes Bohrklein und Bohrmehl wird dabei aus dem Bohrloch ausgeblasen, welches die Umgebung des Bohrlochs verschmutzen kann.From the DE 29 12 396 A1 For example, a through hole cleaning method with a hollow drill is known in which air is blown through the hollow drill into the borehole during the drilling of the borehole. Accumulating drill cuttings and drill dust are thereby blown out of the borehole, which can pollute the environment of the borehole.

Aus der DE 198 10 193 A1 ist ein Bohrloch-Reinigungsverfahren mit einem Hohlbohrer bekannt, bei dem für eine verbesserte Reinigung während dem Bohren des Bohrlochs anfallendes Bohrmehl oder Bohrklein mittels einer Vakuumquelle, wie einen Staubsauger, durch den Hohlbohrer abgesaugt wird.From the DE 198 10 193 A1 For example, a drill hole cleaning method with a hollow drill is known in which, for improved cleaning during drilling of the borehole, drilling dust or drill cuttings are sucked through the hollow drill by means of a vacuum source, such as a vacuum cleaner.

Die Dokumente US 4 182 424 , US 3 306 051 und US 1 969 513 offenbaren andere Verfahren zum Bohren und zum Verankern. Aufgabe der Erfindung ist es, ein sicheres Verfahren zum Verankern und ein Verfahren zur Erstellung eines gereinigten Bohrlochs in einem Bauteil zur chemischen Verankerung eines Befestigungselementes im Bauteil zu schaffen.The documents US 4,182,424 . US 3,306,051 and US 1 969 513 reveal other methods of drilling and anchoring. The object of the invention is to provide a secure method for anchoring and a method for creating a clean well in a component for chemical anchoring of a fastener in the component.

Die Aufgabe ist durch die Merkmale des unabhängigen Anspruchs gelöst. Vorteilhafte Weiterbildungen sind in den Unteransprüchen dargelegt.The object is solved by the features of the independent claim. Advantageous developments are set forth in the subclaims.

Das erfindungsgemäße Verfahren zum Verankern eines Befestigungselements sieht folgende Schritte vor: Bohren eines Bohrlochs in ein Bauteil mittels eines schlagend und drehend angetriebenen Hohlbohrers; Absaugen anfallenden Bohrkleins und Bohrmehls zwischen einer Außenseite des Hohlbohrers und einer Wandung des Bohrlochs mittels einer Vakuumquelle während des Bohrens des Bohrlochs; Einbringen eines selbsthärtenden Mörtels unmittelbar durch das Absaugen gereinigte Bohrloch und Einstecken des Befestigungselements in den selbsthärtenden Mörtel.The method according to the invention for anchoring a fastening element provides for the following steps: drilling a borehole into a component by means of a hollow drill driven in a hammering and rotating manner; Extracting accumulating cuttings and debris between an outside of the auger and a wall of the borehole by means of a vacuum source while drilling the borehole; Introduce a self-hardening mortar immediately through the suction cleaned hole and inserting the fastener in the self-hardening mortar.

Die gewünschten Zuglasten im Bereich von über 1000 Newton werden von dem selbsthärtenden Mörtel nur auf das Bauteil übertragen, wenn das Bohrmehl sauber entfernt ist. Zudem zeigt sich, dass glatte Bohrlochwände, die durch sägen oder schleifen hergestellt sind, sich tendenziell sehr gut durch Absaugen reinigen lassen, aber dennoch keinen ausreichende Haftung des Mörtels an der Bohrwand ermöglichen. Ein teilweise meißelndes Werkzeug, der schlagende Hohlbohrer führt wohl zu einer ausreichenden Rauigkeit und Rissen in der Bohrlochwand, damit der Mörtel haftet.The desired tensile loads in the range of more than 1000 Newtons are transferred from the self-hardening mortar only to the component when the drill dust is removed cleanly. In addition, it turns out that smooth borehole walls made by sawing or grinding tend to be very easy to clean by suction, but still do not allow sufficient adhesion of the mortar to the boring wall. A partially chiselling tool, the beating hollow drill probably leads to sufficient roughness and cracks in the borehole wall, so that the mortar sticks.

Eine Ausgestaltung sieht vor, dass der selbsthärtende Mörtel als zwei Komponenten in das Bohrloch eingebracht wird. Der selbsthärtende Mörtel kann auf einem Epoxyharz und/oder und/oder Polymethacrylat basieren.One embodiment provides that the self-hardening mortar is introduced as two components in the borehole. The self-hardening mortar may be based on an epoxy resin and / or and / or polymethacrylate.

Die Erfindung sieht vor, dass der selbsthärtende Mörtel ohne weiteres Reinigen des Bohrlochs in das Bohrloch eingebracht wird.The invention provides that the self-hardening mortar is introduced into the borehole without further cleaning of the borehole.

Gemäß der Erfindung ist das in dem selbsthärtenden Mörtel verankerte Befestigungselement für Zuglasten von wenigstens 1000 Newton ausgelegtAccording to the invention, the fastener anchored in the self-hardening mortar is designed for tensile loads of at least 1000 Newton

Gemäss der Erfindung wird während dem Bohren des Bohrlochs mit dem Hohlbohrer mittels der Vakuumquelle das Bohrklein und Bohrmehl durch den Spalt zwischen der Aussenseite des Hohlbohrers und der Wandung des Bohrlochs abgesaugt.According to the invention, while drilling the borehole with the hollow drill by means of the vacuum source, the drill cuttings and drilling dust are sucked out through the gap between the outside of the hollow drill and the wall of the borehole.

Durch diese Massnahme wird das Bohrklein und das Bohrmehl fortwährend ausgehend von dem Bohrkopf beziehungsweise ausgehend von den Schneiden des Hohlbohrers durch den Spalt ausserhalb des Hohlbohrers abgesaugt. Dabei strömt gleichzeitig durch den Hohlbohrer hindurch passiv Luft in das Bohrloch nach, womit ein vorteilhaftes Luftströmungsverhalten im Bohrloch zur Entfernung des Bohrkleins und Bohrmehls aus dem Bohrloch gegeben ist. Dadurch wird verhindert, dass das anfallende Bohrklein und insbesondere das anfallende Bohrmehl von vornherein beim Bohrvorgang an der Wandung des Bohrlochs angepresst werden und kaum noch aus dem Bohrloch entfernbar sind. Das erfindungsgemässe Verfahren ist daher auch bei Untergründen und Bauteilen aus einem offenporigen Material in Bezug auf den erzielbaren Reinigungsgrad besonders vorteilhaft.By this measure, the cuttings and the drilling dust is continuously sucked off from the drill head or from the cutting of the hollow drill through the gap outside the hollow drill. At the same time, air passively flows through the hollow drill bit into the borehole, whereby a favorable airflow behavior in the borehole for removing the cuttings and drilling dust from the borehole is achieved. This prevents that the accumulating cuttings and in particular the resulting drill dust are pressed from the outset during the drilling process on the wall of the borehole and are hardly removable from the borehole. The inventive method is therefore particularly advantageous for substrates and components made of an open-pore material in relation to the achievable degree of cleaning.

Das erfindungsgemässe Verfahren ermöglicht in einer einfachen Art und Weise eine Integration der Arbeitsschritte Bohren und Reinigen des Bohrlochs, womit eine separate aufwändige Reinigungsprozedur entfällt und eine signifikante Steigerung der Bohrgeschwindigkeit ermöglicht ist. Damit wird eine deutlich verbesserte Produktivität bei einer gleichzeitigen Erhöhung der Sicherheit und Zuverlässigkeit des chemischen Verankerungspunktes erzielt. Die Reduktion des Arbeitsaufwandes zum Erstellen eines gereinigten Bohrlochs gegenüber einem gereinigten Bohrloch, das ausgebürstet und/oder ausgeblasen wird, beträgt bis zu 50% oder gar mehr.The inventive method allows in a simple manner, an integration of the steps drilling and cleaning the borehole, which eliminates a separate elaborate cleaning procedure and a significant increase in the drilling speed is possible. This achieves significantly improved productivity while increasing the safety and reliability of the chemical anchoring point. Reducing the amount of work required to create a cleaned wellbore from a cleaned wellbore that is being brushed and / or blown is up to 50% or even more.

Da eine gleichmässigere, reproduzierbare Reinigung mit einem hohen Reinigungsgrad durch das erfindungsgemässe Verfahren gewährleistet ist, lassen sich höhere spezifizierte Lasten aufbringen. Bei einer Zulassung durch eine offizielle Stelle lässt sich somit eine wesentlich geringere Minderung des Referenzlastwertes erreichen, womit bei gleichen Abmessungsverhältnissen der chemischen Verankerung zusätzliche Anwendungen ermöglicht sind.Since a more uniform, reproducible cleaning with a high degree of purification is ensured by the inventive method, higher specified loads can be applied. If approved by an official body, a much lower reduction of the reference load value can thus be achieved, which allows additional applications with the same dimensional ratios of the chemical anchoring.

Vorzugsweise wird eine das Bohrloch abdeckende Absaughaube vorgesehen, welche eine Durchführöffnung für den Hohlbohrer sowie einen Anschlussstutzen für die Vakuumquelle aufweist, womit um den Hohlbohrer herum in einem Bereich ausserhalb des Bohrlochs ein Unterdruck erzeugt wird, der eine nahezu vollständige Entfernung beziehungsweise Absaugung des beim Bohren anfallenden Bohrkleins und Bohrmehls durch den Spalt zwischen der Aussenseite des Hohlbohrers und der Wandung des Bohrlochs gewährleistet. Mit dieser Massnahme wird die Reinigung des Bohrlochs noch weiter verbessert, womit die spezifizierten Lasten für die chemische Verankerung weiter erhöht werden können Zudem wird eine Verschmutzung der Umgebung weitgehend ausgeschlossen.Preferably, a suction hood covering the borehole is provided, which has a through-opening for the hollow drill and a connection piece for the vacuum source, whereby a vacuum is produced around the hollow drill in an area outside the borehole, which results in almost complete removal or suction of the boring Cuttings and drilling dust through the gap between the outside of the hollow drill and the wall of the borehole ensured. This action will further enhance the well's clearance, further increasing the specified loads for chemical anchoring. In addition, pollution of the environment will be largely eliminated.

Bevorzugt wird während dem Bohren des Bohrlochs zusätzlich Luft durch den Hohlbohrer in das Bohrloch eingeblasen, womit die Entfernung beziehungsweise Absaugung des beim Bohren anfallenden Bohrkleins und Bohrmehls durch den Spalt zwischen der Aussenseite des Hohlbohrers und der Wandung des Bohrlochs weiter verbessert ist.Preferably, during the drilling of the borehole, additional air is blown through the hollow drill into the borehole, whereby the removal or suction of the drill cuttings and drilling dust resulting from the drilling is further improved by the gap between the outside of the hollow borer and the borehole wall.

Die Erfindung wird nachstehend anhand eines Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
Den Verfahrensschritt des Bohrens des Bohrlochs in einem schematischen Schnitt; und
Fig. 2
ein Befestigungselement im verankerten Zustand.
The invention will be explained in more detail below with reference to an embodiment. Show it:
Fig. 1
The method step of drilling the borehole in a schematic section; and
Fig. 2
a fastener in the anchored state.

Grundsätzlich sind in den Figuren gleiche Teile mit den gleichen Bezugszeichen versehen.Basically, the same parts are provided with the same reference numerals in the figures.

Die in der Figur 1 dargestellte Vorrichtung 11 dient der Durchführung des erfindungsgemässen Verfahrens zur Erstellung eines gereinigten Bohrlochs 7 in einem Bauteil 6, z. B. einer Decke aus Beton, zur chemischen Verankerung eines Befestigungselementes 46 im Bauteil 6. Die Vorrichtung 11 umfasst einen Hohlbohrer 12, eine Absaughaube 21 und eine Vakuumquelle 26, z. B. einen Staubsauger.The in the FIG. 1 illustrated device 11 is used to carry out the inventive method for creating a cleaned borehole 7 in a component 6, z. B. a ceiling made of concrete, for the chemical anchoring of a fastener 46 in the component 6. The device 11 comprises a hollow drill 12, a suction hood 21 and a vacuum source 26, for. B. a vacuum cleaner.

Der Hohlbohrer 12 umfasst einen Schaft 16, der an einem ersten, vorderen Ende einen Bohrkopf 13 mit Austrittsöffnungen 14 und am anderen, hinteren Ende ein Einsteckende 15 zur Anordnung des Hohlbohrers 12 in einer Werkzeugaufnahme 8 eines nicht weiter dargestellten schlagenden und drehenden Bohrgerätes aufweist. In einem Abstand zum Einsteckende 8 ist eine nach radial aussen offene Eintrittsöffnung 17 vorgesehen, welche über einen umfänglich geschlossenen, im Schaft 16 vorgesehenen Längskanal 18 mit den Austrittsöffnungen 14 am Bohrkopf 13 in Verbindung steht.The hollow drill 12 comprises a shaft 16 having at a first, front end a drill head 13 with outlet openings 14 and at the other, rear end a spigot 15 for mounting the hollow drill 12 in a tool holder 8 of a not shown beating and rotating drill. At a distance from the spigot 8 a radially outwardly open inlet opening 17 is provided, which is connected via a circumferentially closed, provided in the shaft 16 longitudinal channel 18 with the outlet openings 14 on the drill head 13 in connection.

Die Absaughaube 21 ist glockenförmig ausgebildet und weist eine Durchführöffnung 22 für den Hohlbohrer 12 sowie einen Anschlussstutzen 23 für den Anschluss einer Saugleitung 27 als Verbindung zur Vakuumquelle 26 auf. Die Durchführöffnung 22 kann mit einer Dichteinrichtung, wie z. B. radial nach innen ragenden Bürstenelementen oder flexiblen Dichtelementen, zur teilweisen Abdichtung der Durchführöffnung 22 versehen sein.The suction hood 21 is bell-shaped and has a passage opening 22 for the hollow drill 12 and a connecting piece 23 for connecting a suction line 27 as a connection to the vacuum source 26. The passage opening 22 may with a sealing device, such as. B. radially inwardly projecting brush elements or flexible sealing elements, for partial sealing of the passage opening 22 may be provided.

Zum Erstellen eines gereinigten Bohrlochs 7 in dem Bauteil 6 wird der Hohlbohrer 12 über das Bohrgerät in Rotation versetzt (siehe Pfeil 9) und zugleich in axialer Richtung schlagend angetrieben, wobei der Bohrkopf 13 bis auf die gewünschte Tiefe des Bohrlochs 7 in das Bauteil 6 eindringt. Gleichzeitig wird die Vakuumquelle 26 in Betrieb genommen. Während dem Bohren des Bohrlochs 7 mit dem Hohlbohrer 12 wird mittels der Vakuumquelle 26 Luft und somit das beim Bohren anfallende Bohrklein und Bohrmehl durch den Spalt zwischen der Aussenseite des Hohlbohrers 12 und der Wandung des Bohrlochs 7 abgesaugt. Gleichzeitig strömt durch die Eintrittsöffnung 17 des Hohlbohrers 12 fortlaufend Luft passiv in das Bohrloch 7 nach, was eine vorteilhafte Luftströmung zur Entfernung des Bohrkleins und Bohrmehls gewährleistet (siehe Strömungspfeile 28).To create a cleaned borehole 7 in the component 6, the hollow drill 12 is rotated by the drilling device (see arrow 9) and at the same time driven in a hammering manner in the axial direction, wherein the boring head 13 penetrates into the component 6 up to the desired depth of the borehole 7 , At the same time, the vacuum source 26 is put into operation. While the drilling of the borehole 7 with the hollow drill 12 by means of the vacuum source 26 air and thus sucked the drilling cuttings and drilling dust through the gap between the outside of the hollow drill 12 and the wall of the borehole 7. At the same time air continuously flows through the inlet opening 17 of the hollow drill 12 into the borehole 7, which ensures an advantageous air flow for the removal of the cuttings and drilling dust (see flow arrows 28).

Optional wird z. B. im Bereich der Eintrittsöffnung 17 ein Zuführadapter 31 vorgesehen, durch den während dem Bohren des Bohrlochs 7 zusätzlich Luft durch den Hohlbohrer 12 in das Bohrloch 7 bedarfsweise aktiv eingeblasen wird.Optionally z. B. in the region of the inlet opening 17 a Zuführadapter 31 is provided, through which during the drilling of the borehole 7 additional air through the hollow drill 12 in the borehole 7, if necessary, actively blown.

Nachdem die gewünschte Tiefe des Bohrlochs 7 erreicht ist, wird die Vorrichtung 11 entfernt. Das erstellte Bohrloch 7 ist bereits ausreichend gereinigt, so dass vor der Befüllung des Bohrlochs 7 mit aushärtbarer Masse 41 kein weiterer Arbeitsschritt zur Reinigung des Bohrlochs 7 erforderlich ist. In das mit aushärtbarer Masse 41 befüllte Bohrloch 7 wird ein Befestigungselement 46, wie eine Gewindestange, eingeschoben. Nach dem Aushärten der aushärtbaren Masse 41 im Bohrloch 7 weist das darin verankerte Befestigungselement 46 wesentlich höhere Auszugswerte als ein in einem herkömmlich erstellten Bohrloch chemisch verankertes Befestigungselement auf, bei dem das Bohrloch nicht nachträglich in optimaler Art und Weise gereinigt wurde.After the desired depth of the borehole 7 is reached, the device 11 is removed. The created borehole 7 has already been adequately cleaned, so that prior to the filling of the borehole 7 with hardenable mass 41, no further working step for cleaning the borehole 7 is required. In the curable mass 41 filled wellbore 7, a fastener 46, such as a threaded rod, is inserted. After the hardenable mass 41 has hardened in the borehole 7, the fastening element 46 anchored therein has substantially higher pull-out values than a fixing element chemically anchored in a conventionally produced borehole, in which the borehole has not subsequently been cleaned in an optimal manner.

Auch mechanisch verankerbare Befestigungselemente erreichen in einem Bohrloch, das nach dem erfindungsgemässen Verfahren hergestellt ist, höhere Auszugswerte als bei einem herkömmlich erstellten Bohrloch.Also mechanically anchored fasteners reach in a well, which is produced by the inventive method, higher Auszugswerte than in a conventionally created well.

Claims (5)

  1. Method for anchoring a fastening element, comprising the steps:
    drilling a borehole (7) in a building component (6) by means of a percussively and rotationally driven hollow drill (12); aspirating drillings and drilling dust produced between an outer side of the hollow drill (12) and a wall of the borehole (7) by means of a vacuum source (26) during the drilling of the borehole (7); introducing a self-hardening mortar (41) directly through the suction-cleaned borehole (7) and inserting the fastening element (46) into the self-hardening mortar (41),
    characterised in that during the drilling of the borehole (7) air is additionally blown through the hollow drill (12) into the borehole (7) and the self-hardening mortar is introduced into the borehole without further cleaning of the borehole.
  2. Method according to Claim 1, characterised in that the self-hardening mortar is introduced into the borehole (7) as two components.
  3. Method according to Claim 1 or 2, characterised in that the self-hardening mortar is based on an epoxy and/or polymethacrylate.
  4. Method according to any one of the preceding claims, characterised in that the fastening element anchored in the self-hardening mortar is designed for tensile loads of not less than 1000 Newtons.
  5. Method according to Claim 1, characterised in that a suction hood (21) covering the borehole (7) is provided and has a through-opening (22) for the hollow drill (12) together with a connecting piece (23) for the vacuum source (26).
EP09175875.5A 2008-11-27 2009-11-13 Method for anchoring an attachment element Active EP2192261B1 (en)

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DE102008044128 2008-11-27

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EP2192261B1 true EP2192261B1 (en) 2018-05-23

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US (1) US20100126112A1 (en)
EP (1) EP2192261B1 (en)
DK (1) DK2192261T3 (en)
ES (1) ES2671373T3 (en)

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US20100126112A1 (en) 2010-05-27
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DK2192261T3 (en) 2018-07-23

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