EP0524223B1 - Injection drilling anchor - Google Patents
Injection drilling anchor Download PDFInfo
- Publication number
- EP0524223B1 EP0524223B1 EP91907426A EP91907426A EP0524223B1 EP 0524223 B1 EP0524223 B1 EP 0524223B1 EP 91907426 A EP91907426 A EP 91907426A EP 91907426 A EP91907426 A EP 91907426A EP 0524223 B1 EP0524223 B1 EP 0524223B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- anchor
- borehole
- section
- drill
- 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.)
- Expired - Lifetime
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Definitions
- the invention relates to an injection drill anchor for securing routes and spaces by injecting synthetic resin, in particular in mining and tunnel construction, which consists of an anchor pipe which can be assembled from at least two sections which can be connected via sleeves and which has a drill bit at the anchor tip which is the deepest in the borehole, and Has flushing and injection openings and the section protruding from the borehole for the drilling function has a releasable connection element for a drilling machine, the anchor tube for injection being provided with a borehole closure and a connection element for an injection head.
- Drill anchors consist of an anchor tube with a welded or attachable so-called lost drill bit attached to its tip.
- the anchor pipe is initially used as a drill pipe and subsequently as an anchor, the anchor pipe being filled after drilling, for example with adhesive mortar, in order to fill the annular space and the upcoming gaps in the mountains.
- a particular advantage of using drill anchors of this type is that the anchor pipes can be made from sections that can be assembled via sleeves and are thus suitable for being introduced from narrow distances.
- the drill anchors are inserted using rotary or impact drills.
- a particular disadvantage when using drill anchors with lost drill bits is the difficulty in adequately sealing the borehole, in particular when injecting a two-component synthetic resin, with correspondingly high pressures.
- an injection pipe which is suitable for bonding loosened mountain areas by injections with strengthening agents, in particular in the face, to face edges and geological disturbances.
- borehole closures in the form of so-called inflatable packers are applied to the injection pipe.
- the inflation packer is first inflated by the injection pressure in such a way that there is a tight contact with the borehole wall so that the actual injection process can then be carried out.
- the invention has for its object to provide an injection drill anchor, which is suitable to be used when equipped with a lost Borhkrone and extendable over corresponding sections both as a drill pipe and as an anchor tube, using rotation - and impact drills the difficulties of inserting anchor rods, in particular in the mountainous area, and which allows the use of synthetic resins which can be pressed in under high pressures, with a complete sealing of the borehole being made possible.
- connection element for a drill of the anchor tube is interchangeable with a section which is provided with the borehole closure, the connection element for the injection head and a check valve.
- the injection drill anchor can be adjusted to any desired length over several sections and corresponding socket connections, a check valve in the form of a rupture disk being provided in the connection socket of the last section which has a borehole closure in the form of an inflatable packer.
- stops are provided within the internally threaded sleeves, which are formed in connection with a screw-in end of a section for locking the rupture disk.
- the exchangeable anchor tube section which accommodates the inflatable packer, can be replaced at the end with a thread for receiving an injection head or for receiving a dome nut for the dome plate.
- the inflatable packer is known as an inflatable hose section surrounding the anchor tube section and held at the ends by bindings is formed, a check valve being integrated between the anchor rod and the inflation chamber to prevent the return from the inflation chamber.
- the advantage of the injection drill anchor according to the invention can be seen in particular in the fact that, when the borehole is produced, the drill rod is adequately transported by the function of the anchor rod as a drill by flushing with water or air, and that the subsequent function of the same rod as the anchor ensures the guarantee occurs that the destruction of the borehole produced by pulling out the entire rod or by broken mineral or rock is avoided, the interchangeability of the last section of the entire rod, which is designed as a drill or as an anchor, furthermore ensures a complete and safe saving of injection material Sealing the borehole in question.
- the injection drill anchor essentially consists of an anchor tube 1, which is composed of sections 2 and 3 via a sleeve 7.
- section 2 is provided with a lost drill bit 4 and also has flushing or injection openings 5 and 6.
- Sections 2 can be smooth-walled or profiled for later better adhesion.
- the sleeve 7 is provided with internal threads 8 and has stops 9 between the ends of the sections 2 and 3.
- the section 3 is provided at the end protruding from the borehole mouth with a schematically illustrated drilling adapter 12 which can be screwed onto the thread 11. With this design or divided into further sections, the anchor tube 1 is initially used to create a borehole.
- FIG. 2 shows an exemplary embodiment of an injection drill anchor, in which the section 3 which is initially required to produce a borehole is replaced by a section 13.
- the section 13 is threaded at the end protruding from the borehole provided for receiving an injection head and has a check valve 19.
- Section 13 is also provided with a so-called inflatable packer 14 for sealing off the borehole.
- the inflatable packer 14 essentially consists of a hose section 21 which is fixed immovably on the section 13 by means of covers 17, 18.
- bores 15 are provided in the section 13, which are sealed by a sleeve 16 and are designed as a check valve.
- a rupture disk 10 is inserted, which is locked in position between a stop 9 and the end of a section 2 or 13.
- the openings provided as flushing openings 5, 6 in the production of the borehole now serve as injection openings.
- the inner channel of the anchor pipe 1 initially serves as a flushing channel when drilling a hole in the rock in order to use the flushing medium to remove the cuttings from the drill hole via the annular space.
- the inflation space of the inflatable packer 14 is inflated in such a way that a tight, all-round contact with the borehole wall is achieved.
- the further increasing pressure of the injection destroys the rupture disk 10 and the annular space or the fissures in the mountains are injected.
- a spherical cap is screwed onto the end of the anchor tube protruding from the borehole mouth.
Abstract
Description
Die Erfindung betrifft einen Injektionsbohranker zur Sicherung von Strecken und Räumen durch Injektion von beispielsweise Kunstharz, insbesondere im Berg- und Tunnelbau, der aus einem aus mindestens zwei über Muffen miteinander verbindbaren Abschnitten zusammensetzbaren Ankerrohr besteht, das an der zum Bohrlochtiefsten gerichteten Ankerspitze eine Bohrkrone, sowie Spül- und Injektionsöffnungen aufweist und der aus dem Bohrloch herausragende Abschnitt für die Bohrfunktion ein lösbares Anschlußelement für eine Bohrmaschine aufweist, wobei das Ankerrohr für die Injektion mit einem Bohrlochverschluß und einem Anschlußelement für einen Injektionskopf zu versehen ist. Dieser Stand der Technik ist in der DE-A-37 17 024 beschrieben.The invention relates to an injection drill anchor for securing routes and spaces by injecting synthetic resin, in particular in mining and tunnel construction, which consists of an anchor pipe which can be assembled from at least two sections which can be connected via sleeves and which has a drill bit at the anchor tip which is the deepest in the borehole, and Has flushing and injection openings and the section protruding from the borehole for the drilling function has a releasable connection element for a drilling machine, the anchor tube for injection being provided with a borehole closure and a connection element for an injection head. This prior art is described in DE-A-37 17 024.
Es ist seit langem bekannt, insbesondere im Untertagebergbau, um das Gebirge zur Sicherung des Streckenhohlraumes in seinem Verband zu erhalten, die Strecken durch Ankerausbau zu unterstützen. Zu diesem Zweck werden üblicherweise in ein Bohrloch Klebepatronen eingeführt, die anschließend durch das Eindrehen der Ankerstange zerstört werden und durch Mischung zweier Komponenten die Ankerstange über die gesamte Länge im Bohrloch verkleben. Bei der Durchführung einer derartigen Ankerung treten dann Probleme auf, wenn das Gebirge bereits aufgelockert ist, und das Herstellen von Bohrlöchern bzw. das nachfolgende Einbringen von Klebepatronen und Ankerstangen in das Bohrlochtiefste nicht mehr möglich ist.It has been known for a long time, especially in underground mining, in order to maintain the mountains in its association to secure the route cavity, to support the routes by anchoring. For this purpose, adhesive cartridges are usually inserted into a borehole, which are subsequently destroyed by screwing in the anchor rod and by mixing two components, the anchor rod Glue the entire length in the borehole. Problems occur when such anchoring is carried out when the mountains have already been loosened and it is no longer possible to produce boreholes or the subsequent insertion of adhesive cartridges and anchor rods into the deepest borehole.
Derartige Schwierigkeiten umgeht man durch die Verwendung von Bohrankern. Bohranker bestehen aus einem Ankerrohr, an dessen Spitze eine angeschweißte oder aufsteckbare, sogenannte verlorene Bohrkrone angebracht ist. Das Ankerrohr wird zunächst als Bohrgestänge und im Nachhinein als Anker verwendet, wobei das Ankerrohr nach dem Abbohren, beispielsweise mit Klebemörtel beschickt wird, um den Ringraum und die anstehenden Klüfte im Gebirge zu verfüllen. Ein besonderer Vorteil der Verwendung derartiger Bohranker besteht darin, daß die Ankerrohre aus über Muffen zusammensetzbare Abschnitte verlängerbar ausgebildet sind und auf diese Weise geeignet sind, aus beengten Strecken eingebracht zu werden. Die Bohranker werden über Dreh- oder Schlagbohrmaschinen eingebracht. Ein besonderer Nachteil bei der Verwendung von Bohrankern mit verlorenen Bohrkronen besteht in der Schwierigkeit, das Bohrloch insbesondere bei Injizierung eines Zweikomponenten-Kunstharzes mit entsprechend hohen Drücken ausreichend abzudichten.Such difficulties are avoided by using drill anchors. Drill anchors consist of an anchor tube with a welded or attachable so-called lost drill bit attached to its tip. The anchor pipe is initially used as a drill pipe and subsequently as an anchor, the anchor pipe being filled after drilling, for example with adhesive mortar, in order to fill the annular space and the upcoming gaps in the mountains. A particular advantage of using drill anchors of this type is that the anchor pipes can be made from sections that can be assembled via sleeves and are thus suitable for being introduced from narrow distances. The drill anchors are inserted using rotary or impact drills. A particular disadvantage when using drill anchors with lost drill bits is the difficulty in adequately sealing the borehole, in particular when injecting a two-component synthetic resin, with correspondingly high pressures.
Für das Injizieren von Zementmörtel werden auf das Bohrgestänge aufschraubbare Bohrlochverschlüsse verwendet, die für die vorgesehenen Drücke beim Injizieren von aufschäumenden Kunstharzen völlig ungeeignet sind.For the injection of cement mortar screw-on screw caps are used, which are suitable for the intended pressures at the Injecting foaming synthetic resins are completely unsuitable.
Bei der schon erwähnten DE-A-37 17 024 wird der Bohrlochverschluß nach dem Bohren auf die Ankerstange aufgeschoben und gegen die Bohrlochwandung aufgeweitet. Desweiteren wird ein Adapter für den Anschluß an den Bohrhammer durch einen Adapter für den Anschluß an eine Injektionsleitung ersetzt. Zwischen dem Adapter und der Injektionsleitung ist ein Mischrohr mit einem Rückschlagventil vorgesehen. Ein Mischer und ein Rückschlagventil können auch in dem Adapter vorgesehen sein.In the already mentioned DE-A-37 17 024, the borehole closure is pushed onto the anchor rod after drilling and expanded against the borehole wall. Furthermore, an adapter for connection to the hammer drill is replaced by an adapter for connection to an injection line. A mixing tube with a check valve is provided between the adapter and the injection line. A mixer and a check valve can also be provided in the adapter.
Nach dem DE-G-89 06 126 ist darüber hinaus ein Injektionsrohr bekannt, das geeignet ist, aufgelockerte Gebirgsbereiche durch Injektionen mit Verfestigungsmitteln, insbesondere im Streb, an Strebrändern und geologischen Störungen, zu verkleben. Zur Abdichtung des Bohrloches werden auf das Injektionsrohr Bohrlochverschlüsse in Form von sogenannten Blähpackern aufgebracht. Durch die Anordnung entsprechender Rückschlagventile wird zunächst durch den Injektionsdruck der Blähpacker derartig aufgebläht, daß eine dichte Anlage an der Bohrlochwandung vorhanden ist, um anschließend den eigentlichen Injektionsvorgang durchführen zu können.According to DE-G-89 06 126, an injection pipe is also known which is suitable for bonding loosened mountain areas by injections with strengthening agents, in particular in the face, to face edges and geological disturbances. To seal the borehole, borehole closures in the form of so-called inflatable packers are applied to the injection pipe. By arranging appropriate check valves, the inflation packer is first inflated by the injection pressure in such a way that there is a tight contact with the borehole wall so that the actual injection process can then be carried out.
Ausgehend von dem beschriebenen Stand der Technik liegt der Erfindung die Aufgabe zugrunde, einen Injektionsbohranker zu schaffen, der geeignet ist, bei Bestückung mit einer verlorenen Borhkrone und über entsprechende Abschnitte verlängerbar sowohl als Bohrgestänge als auch als Ankerrohr verwendet zu werden, wobei unter Verwendung von Dreh- und Schlagbohrmaschinen die Schwierigkeiten des Einbringens von Ankerstangen, insbesondere in gebrächiges Gebirge umgangen werden, und der die Verwendung von unter hohen Drücken einpreßbaren Kunstharzen erlaubt, wobei eine vollständige Abdichtung des Bohrlochs ermöglicht wird.Based on the described prior art, the invention has for its object to provide an injection drill anchor, which is suitable to be used when equipped with a lost Borhkrone and extendable over corresponding sections both as a drill pipe and as an anchor tube, using rotation - and impact drills the difficulties of inserting anchor rods, in particular in the mountainous area, and which allows the use of synthetic resins which can be pressed in under high pressures, with a complete sealing of the borehole being made possible.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der aus dem Bohrloch herausragende und mit dem Anschlußelement für eine Bohrmaschine versehene Abschnitt des Ankerrohres gegen einen Abschnitt austauschbar ist, der mit dem Bohrlochverschluß, dem Anschlußelement für den Injektionskopf und einem Rückschlagventil versehen ist.This object is achieved in that the protruding from the borehole and provided with the connection element for a drill of the anchor tube is interchangeable with a section which is provided with the borehole closure, the connection element for the injection head and a check valve.
Für den Einsatz der Injektionsbohranker ist es selbstverständlich, daß im Anschluß an die vorgenommene Injektion auf das Ankerende unter Verwendung einer ein entsprechendes Widerlager bildenden Schraubenmutter eine Kalottenplatte aufgeschraubt wird.For the use of the injection drill anchors, it goes without saying that, following the injection which has been carried out, a spherical cap plate is screwed onto the anchor end using a screw nut which forms a corresponding abutment.
Der Injektionsbohranker kann über mehrere Abschnitte und entsprechende Muffenverbindungen auf jede gewünschte Länge eingestellt werden, wobei in der Verbindungsmuffe des letzten, einen Bohrlochverschluß in Form eines Blähpackers aufweisenden Abschnitts ein Rückschlagventil in Form einer Berstscheibe vorgesehen ist. Zu diesem Zweck sind innerhalb der mit Innengewinde versehenen Muffen Anschläge vorgesehen, die in Verbindung mit einem einschraubbaren Ende eines Abschnitts zur Arretierung der Berstscheibe ausgebildet sind. Der gegenüber dem letzten mit der Bohrfunktion beaufschlagten Abschnitt austauschbare, den Blähpacker aufnehmende Ankerrohrabschnitt weist am Ende ein Gewinde zur Aufnahme eines Injektionskopfes bzw. zur Aufnahme einer Kalottenmutter für die Kalottenplatte auf.The injection drill anchor can be adjusted to any desired length over several sections and corresponding socket connections, a check valve in the form of a rupture disk being provided in the connection socket of the last section which has a borehole closure in the form of an inflatable packer. For this purpose, stops are provided within the internally threaded sleeves, which are formed in connection with a screw-in end of a section for locking the rupture disk. The exchangeable anchor tube section, which accommodates the inflatable packer, can be replaced at the end with a thread for receiving an injection head or for receiving a dome nut for the dome plate.
Darüber hinaus ist in das mit einem Gewinde versehene Ende ein weiteres Rückschlagventil eingearbeitet. Der Blähpacker ist in bekannter Weise als ein das Ankerrohrabschnitt umgebender und an den Enden durch Einbände gehaltener, aufblähbarer Schlauchabschnitt ausgebildet, wobei zwischen Ankerstange und Blähraum ein Rückschlagventil zur Vermeidung des Rücklaufs aus dem Blähraum integriert ist.In addition, another check valve is incorporated into the threaded end. The inflatable packer is known as an inflatable hose section surrounding the anchor tube section and held at the ends by bindings is formed, a check valve being integrated between the anchor rod and the inflation chamber to prevent the return from the inflation chamber.
Der Vorteil des erfindungsgemäßen Injektionsbohrankers ist insbesondere darin zu sehen, daß zunächst beim Herstellen des Bohrlochs durch die Funktion der Ankerstange als Bohrer durch die Spülung mit Wasser oder Luft ein ausreichender Transport des Bohrkleins stattfindet und daß durch die anschließende Funktion des gleichen Gestänges als Anker die Gewährleistung eintritt, daß die durch Herausziehen des gesamten Gestänges oder durch gebräches Mineral bzw. Gebirge verursachte Zerstörung des hergestellten Bohrlochs vermieden wird, Die Austauschbarkeit des letzten Abschnitts des gesamten als Bohrer bzw. als Anker ausgebildeten Gestänges gewährleistet darüber hinaus unter Einsparung von Injektionsmaterial ein vollständiges und sicheres Abdichten des betreffenden Bohrlochs.The advantage of the injection drill anchor according to the invention can be seen in particular in the fact that, when the borehole is produced, the drill rod is adequately transported by the function of the anchor rod as a drill by flushing with water or air, and that the subsequent function of the same rod as the anchor ensures the guarantee occurs that the destruction of the borehole produced by pulling out the entire rod or by broken mineral or rock is avoided, the interchangeability of the last section of the entire rod, which is designed as a drill or as an anchor, furthermore ensures a complete and safe saving of injection material Sealing the borehole in question.
Ein Auführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden näher erläutert.An exemplary embodiment of the invention is shown in the drawings and is explained in more detail below.
Es zeigen:
- Figur. 1 -
- eine schematisierte Wiedergabe eines Ausführungsbeispieles eines Injektionsbohrankers, wie er erfindungsgemäß zum Abbohren eines Bohrlochs ausgebildet ist und
- Figur 2 -
- eine ebenfalls schematisierte und geschnittene Wiedergabe eines Ausführungsbeispieles eines Injektionsbohrankers, wie er zum anschließenden Injizieren und Ankern ausgebildet ist unter Einbeziehung eines Bohrlochverschlusses.
- Figure. 1 -
- a schematic representation of an embodiment of an injection drill anchor, as it is designed according to the invention for drilling a borehole and
- Figure 2 -
- a likewise schematic and sectional representation of an embodiment of an injection drill anchor as it is designed for subsequent injection and anchoring, including a borehole closure.
Der Injektionsbohranker nach dem Ausführungsbeispiel, wie in Figur 1 beschrieben, besteht im wesentlichen aus einem Ankerrohr 1, das aus den Abschnitten 2 und 3 über eine Muffe 7 zusammengesetzt ist. An dem zum Bohrlochtiefsten gerichteten Ende ist der Abschnitt 2 mit einer verlorenen Bohrkrone 4 versehen und weist darüber hinaus Spül- bzw. Injektionsöffnungen 5 und 6 auf. Die Abschnitte 2 können glattwandig oder zur späteren besseren Haftung auch profiliert ausgebildet sein. Die Muffe 7 ist jeweils mit Innengewinden 8 versehen und weist zwischen den Enden der Abschnitte 2 und 3 Anschläge 9 auf. Der Abschnitt 3 ist an dem aus dem Bohrlochmund herausragenden Ende mit einem auf das Gewinde 11 aufschraubbaren schematisiert dargestellten Bohradapter 12 versehen. Mit dieser Ausbildung oder unterteilt in weitere Abschnitte wird das Ankerrohr 1 zunächst zur Erstellung eines Bohrlochs verwendet.The injection drill anchor according to the exemplary embodiment, as described in FIG. 1, essentially consists of an anchor tube 1, which is composed of
In Figur 2 ist ein Ausführungsbeispiel eines Injektionsbohrankers dargestellt, bei welchem der zunächst zur Erstellung eines Bohrlochs erforderliche Abschnitt 3 gegen einen Abschnitt 13 ausgetauscht ist. Der Abschnitt 13 ist an dem aus dem Bohrloch herausragenden Ende mit einem Gewinde 20 zur Aufnahme eines Injektionskopfes versehen und weist ein Rückschlagventil 19 auf. Des weiteren ist der Abschnitt 13 mit einem sogenannten Blähpacker 14 zur Bohrlochabdichtung versehen. Der Blähpacker 14 besteht im wesentlichen aus einem Schlauchabschnitt 21, der über Einbände 17, 18 auf dem Abschnitt 13 unverrückbar befestigt ist. Zur Verfüllung des Blähraums des Schlauchabschnitts 21 sind in dem Abschnitt 13 Bohrungen 15 vorgesehen, die über eine Manschette 16 abgedichtet und als Rückschlagventil ausgebildet sind. Am vorderen Ende des Abschnitts 13, und zwar innerhalb der Muffe 7 ist eine Berstscheibe 10 eingelegt, die zwischen einem Anschlag 9 und dem Ende eines Abschnitts 2 bzw. 13 in ihrer Position arretiert wird. Die bei der Herstellung des Bohrlochs als Spülöffnungen 5, 6 vorgesehenen Öffnungen dienen nunmehr als Injektionsöffnungen.FIG. 2 shows an exemplary embodiment of an injection drill anchor, in which the
Beim Einbringen eines Injektionsbohrankers dient zunächst der Innenkanal des Ankerrohres 1 beim Erstellen eines Bohrlochs im Gestein als Spülkanal, um mit Hilfe des Spülmediums das Bohrklein über den Ringraum aus dem Bohrloch abzutransportieren.When an injection drill anchor is introduced, the inner channel of the anchor pipe 1 initially serves as a flushing channel when drilling a hole in the rock in order to use the flushing medium to remove the cuttings from the drill hole via the annular space.
Nach dem Einbohren des aus mehreren Abschnitten 2 zusammensetzbaren Ankerrohres 1 wird dieses nur soweit aus dem Bohrloch herausgezogen, daß der letzte Abschnitt 3 aus der Muffenverbindung gelöst und gegen einen Abschnitt 13 ausgetauscht wird, der mit einem Blähpacker 14 und dem Anschluß für einen Injektionskopf ausgerüstet ist.After drilling in the anchor pipe 1, which can be assembled from
Bei der Durchführung der Injektion wird zunächst durch die als Rückschlagventil dienende Berstscheibe 10 der Blähraum des Blähpackers 14 derart aufgebläht, daß eine dichte, allseitige Anlage an der Bohrlochwandung erzielt wird. Der weiter ansteigende Druck der Injektion zerstört die Berstscheibe 10 und es erfolgt die Injektion des Ringraumes bzw. der Klüfte im Gebirge. Nach dem Abschluß der Injektion wird eine Kalottenplatte auf das aus dem Bohrlochmund herausragende Ende des Ankerrohres aufgeschraubt.When performing the injection, first of all by means of the
Claims (5)
- Injection-drill anchor for stabilizing sections and spaces by injection of for example synthetic resin, especially in mining and tunnelling, consisting of an anchor tube (1) composed of at least two sections (2, 3) which can be connected to each other by sleeves (7), said anchor tube having at the tip of the anchor oriented toward the deepest of the borehole a drill head (4) as well as rinsing and injection apertures (5, 6), and the section (3) extending from the borehole having for the drilling operation a releasable connector element for a drilling machine, said anchor tube being adapted to be provided for the injection with a borehole closure as well as a connector element for an injection head, characterized in that the section (3) of the anchor tube (1) extending from the borehole and provided with the connector element for a drilling machine is replaceable by a section (13) provided with said borehole closure, the injection head and a non-return valve.
- Injection-drill anchor according to claim 1, characterized in that the non-return valve consists of a rupturable disk (10).
- Injection-drill anchor according to claim 1, characterized in that the borehole closure comprises a swelling packer (14).
- Injection-drill anchor according to claim 2, characterized in that the non-return valve consisting of a rupturable disk (10) is provided at the end of the section (13) oriented toward the deepest of the borehole, and that the section (13) has at the other end extending from the borehole a further non-return valve (19).
- Injection-drill anchor according to claim 1 or 2, characterized in that the sleeve (7) interconnecting the sections (2, 3; 2, 13) is provided with a stop (9) receiving the end of the sections (2, 3; 2, 13) and that the stop (9) is designed for arresting the non-return valve (10).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9004177U | 1990-04-11 | ||
| DE9004177U DE9004177U1 (en) | 1990-04-11 | 1990-04-11 | |
| PCT/EP1991/000692 WO1991015657A1 (en) | 1990-04-11 | 1991-04-10 | Injection drilling anchor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0524223A1 EP0524223A1 (en) | 1993-01-27 |
| EP0524223B1 true EP0524223B1 (en) | 1994-07-20 |
Family
ID=6852815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91907426A Expired - Lifetime EP0524223B1 (en) | 1990-04-11 | 1991-04-10 | Injection drilling anchor |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0524223B1 (en) |
| DE (2) | DE9004177U1 (en) |
| PL (1) | PL168194B1 (en) |
| WO (1) | WO1991015657A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119669A (en) * | 2017-05-23 | 2017-09-01 | 中交第二航务工程局有限公司 | For shield, the pre-pouring grout consolidated subsoil method in house is worn in side in water-rich sand layer |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4128154C2 (en) * | 1991-07-02 | 1994-06-16 | Gd Anker Gmbh & Co Kg | Injection tube and method for placing a rock anchor |
| CA2090430A1 (en) * | 1991-07-02 | 1993-01-03 | Heinz Gruber | Injection tube and method for placing a ground anchor |
| DE4209802C1 (en) * | 1992-03-26 | 1993-08-26 | Schmidt, Kranz & Co Gmbh Zweigniederlassung Zorge, 3421 Zorge, De | Rock or masonry sealant injection tube - has bursting disc retained by securing ring in counterbored and externally conical discharge end |
| DE4446625C1 (en) * | 1994-12-24 | 1996-07-11 | Reburg Patentverwertungs Gmbh | Injection valve for an injection drill anchor |
| IT1275231B (en) * | 1995-02-09 | 1997-07-31 | Sireg S P A Soc It Di Ricerca | DEVICE FOR REINFORCEMENT THE CONSOLIDATION AND STABILIZATION OF THE LAND PARTICULARLY SUITABLE FOR PREVENTING LANDSLIDES OR DEFORMATIONS OF THE EXCAVATION FRONT IN GALLERIES OR EXCAVATIONS IN THE TRENCH |
| DE19960023A1 (en) * | 1999-12-13 | 2001-06-28 | Keller Grundbau Gmbh | Active foundation |
| DE20001930U1 (en) * | 2000-02-05 | 2000-09-07 | Jora Tec Gmbh Berg Tunnelbau U | Injection anchor |
| DE10148683C1 (en) | 2001-10-02 | 2002-10-24 | Schmidt & Co Gmbh Kranz | Injection bore anchor has steel tube with smooth outer surface section and bore drive with exchangeable adaptor |
| DE102008005452B4 (en) * | 2008-01-21 | 2009-12-31 | Dmi Injektionstechnik Gmbh | Process for consolidating soil sections and device for carrying out the process |
| CH702595B1 (en) * | 2010-01-28 | 2018-09-14 | Kuechler Technik Ag | Drilling hole seal and self-drilling anchor with such a Bohrankerdichtung. |
| AT510139B1 (en) * | 2010-07-02 | 2015-05-15 | Söllinger Johann | DEVICE FOR SEALING AND FIXING A PIPE INSERTED IN A BOREOUR HOLE |
| CN113969798B (en) * | 2021-09-08 | 2023-09-26 | 齐鲁理工学院 | Anchoring device for supporting roof of coal mine tunnel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3717024A1 (en) * | 1987-05-21 | 1988-12-01 | Willich F Gmbh & Co | Device for drilling boreholes and injecting stabilising material |
| DE8906126U1 (en) * | 1989-05-18 | 1990-04-19 | Bergwerksverband Gmbh, 4300 Essen, De |
-
1990
- 1990-04-11 DE DE9004177U patent/DE9004177U1/de not_active Expired - Lifetime
-
1991
- 1991-04-10 PL PL91296327A patent/PL168194B1/en unknown
- 1991-04-10 EP EP91907426A patent/EP0524223B1/en not_active Expired - Lifetime
- 1991-04-10 WO PCT/EP1991/000692 patent/WO1991015657A1/en active IP Right Grant
- 1991-04-10 DE DE59102272T patent/DE59102272D1/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119669A (en) * | 2017-05-23 | 2017-09-01 | 中交第二航务工程局有限公司 | For shield, the pre-pouring grout consolidated subsoil method in house is worn in side in water-rich sand layer |
Also Published As
| Publication number | Publication date |
|---|---|
| PL168194B1 (en) | 1996-01-31 |
| DE59102272D1 (en) | 1994-08-25 |
| EP0524223A1 (en) | 1993-01-27 |
| DE9004177U1 (en) | 1990-06-28 |
| WO1991015657A1 (en) | 1991-10-17 |
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