DE1965776A1 - Reinforcing rock faces - Google Patents

Reinforcing rock faces

Info

Publication number
DE1965776A1
DE1965776A1 DE19691965776 DE1965776A DE1965776A1 DE 1965776 A1 DE1965776 A1 DE 1965776A1 DE 19691965776 DE19691965776 DE 19691965776 DE 1965776 A DE1965776 A DE 1965776A DE 1965776 A1 DE1965776 A1 DE 1965776A1
Authority
DE
Germany
Prior art keywords
concrete
rock
propellant
bag
added
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.)
Pending
Application number
DE19691965776
Other languages
German (de)
Inventor
Gerd Dipl-Ing Kippenberger
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.)
RAG AG
Original Assignee
Ruhrkohle AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ruhrkohle AG filed Critical Ruhrkohle AG
Priority to DE19691965776 priority Critical patent/DE1965776A1/en
Publication of DE1965776A1 publication Critical patent/DE1965776A1/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • E21D21/0086—Bearing plates

Abstract

Rock faces are reinforced by reinforcing rods inserted in bore holes in the rock face and held with adhesive. A cup-shaped cover plate is pushed over the projecting end of the rod and holds a bag of concrete between itself and the rock face. When the concrete in the bag is still plastic, a propellant pref. oiled Al powder, is added.

Description

"Verfahren zum Verspannen von Gebirgsankern" Die Erfindung betrifft ein Verfahren zum Verspannen eines Gebirgsankers, bei dem innerhalb der kalottenförmigen Abdeckplatte ein eine plastisch verformbare schnell härtende Füllung, vorzugsweise Beton, beinhaltender Beutel angeordnet ist. "Method for tensioning rock anchors" The invention relates to a method for tensioning a rock anchor, in which within the dome-shaped Cover plate is a plastically deformable, fast-curing filling, preferably Concrete containing bag is arranged.

Gebirgsankerstangen werden bekanntlich in einem Ankerbohrloch durch Spreitzhülsen oder Klebstoff gehaltert, wobei über das aus dem Ankerbohrloch herausragende Ende der Ankerstange eine kalottenförmige Abdeckplatte geschoben wird, die anschließend durch eine auf der Ankerstange angeordnete Mutter verspannt wird. Infolge ungleichmäßiger Oberfläche des Gebirgskörpers können durch das Verspannen punktförmig Belastungen auftreten, die zu einer Zerstörung des Gebirgskörpers an diesen Stellen führen können.Rock anchor rods are known to be in an anchor borehole Expanding sleeves or adhesive held, with the protruding from the anchor borehole At the end of the anchor rod a dome-shaped cover plate is pushed, which then is braced by a nut arranged on the anchor rod. As a result of uneven The surface of the mountain body can be subjected to point loads due to the bracing occur, which can lead to the destruction of the mountain at these points.

Aus dem deutschen Gebrauchsmuster 6 810 304 ist es bekannt, zwischen der kalottenförmigen Abdeckplatte und dem Gebirgskörper einen Beutel anzuordnen, der mit einer plastisch verformbaren schnell härtenden Füllung versehen ist. Diese Füllung besteht vorzugsweise aus Beton. Nach dem Verspannen des Gebirgskörpers wird durch die Betonmasse eine weitgehende Anpassung an die unregelmäßige Oberfläche des Gebirgskörpers ermöglicht, so daß die nachteiligen punktförmigen Belastungen vermieden werden können.From the German utility model 6 810 304 it is known between to arrange a bag of the dome-shaped cover plate and the rock mass, which is provided with a plastically deformable, fast-curing filling. These The filling is preferably made of concrete. After the mountain body is braced due to the concrete mass an extensive adaptation to the irregular surface of the mountain body allows, so that the disadvantageous point loads can be avoided.

Ausgehend von diesem Stand der Technik ist es die Aufgabe der Erfindung, ein Verfahren zu schaffen, daß es ermöglicht, Gebirgsanker besser zu verspannen.Based on this prior art, the object of the invention is to create a process that enables rock anchors to be better braced.

Gelöst wird diese Aufgabe erfindungsgemäß dadurch, daß dem noch plastischen Beton vor dem Verspannen des Gebirgsankers ein Treibmittel zugesetzt wird.This object is achieved according to the invention in that the still plastic A propellant is added to concrete before the rock anchor is braced.

Nach einem weiteren Merkmal der Erfindung besteht das zugesetzte Treibmittel aus geöltem Aluminiumpulver0 Der Zusatz eines Treibmittels zu dem noch plastischen Beton vor der Verankerung des Gebirgsankers bewirkt, daß nach der Verankerung und weitgehenden Anpassung des erhärtenden Betons an die Oberfläche des Gebirgskörpers bzw. an die kalottenförmige Abdeckplatte eine Volumenvergrößerung eintritt. Diese Volumenvergrößerung bewirkt eine zusätzliche Verspannung des GebirgsankersO Der Zusatz an Treibmittel beträgt nach einem weiteren Merkmal der Erfindung etwa 1 g/looo ccm Beton.According to a further feature of the invention, there is the added propellant from oiled aluminum powder0 The addition of a propellant to the still plastic one Concrete before anchoring the rock anchor causes after anchoring and extensive adaptation of the hardening concrete to the surface of the rock mass or an increase in volume occurs on the dome-shaped cover plate. These The increase in volume causes additional tensioning of the rock anchor O Der According to a further feature of the invention, the addition of propellant is about 1 g / 10000 ccm concrete.

-Patentansprüche- -Patent claims-

Claims (1)

Patentansprüche 1. Verfahren zum Verspannen eines Gebirgsankers, bei dem innerhalb der kalottenförmigen Abdeckplatte ein eine plastisch verformbare schnell härtende Füllung, vorzugsweise Beton, beinhaltender Beutel angeordnet ist, dadurch gekennzeichnet, daß dem noch plastischen Beton vor der Verankerung des Gebirgsankers ein Treibmittel zugesetzt wird. Claims 1. Method for tensioning a rock anchor, in which a plastically deformable one within the dome-shaped cover plate fast-setting filling, preferably concrete, containing the bag is arranged, characterized in that the concrete is still plastic before the anchoring of the rock anchor a propellant is added. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Treibmittel geöltes Aluminiumpulver zugesetzt wird.2. The method according to claim 1, characterized in that as a propellant oiled aluminum powder is added. 30 Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß geöltes Aluminiumpulver in einem Verhältnis von weniger als 1 g auf ioo ccm Beton zugemischt wird030 Process according to Claims 1 and 2, characterized in that that oiled aluminum powder in a ratio of less than 1 g to 100 cc Concrete is mixed in 0
DE19691965776 1969-12-23 1969-12-23 Reinforcing rock faces Pending DE1965776A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691965776 DE1965776A1 (en) 1969-12-23 1969-12-23 Reinforcing rock faces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691965776 DE1965776A1 (en) 1969-12-23 1969-12-23 Reinforcing rock faces

Publications (1)

Publication Number Publication Date
DE1965776A1 true DE1965776A1 (en) 1971-07-01

Family

ID=5755418

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19691965776 Pending DE1965776A1 (en) 1969-12-23 1969-12-23 Reinforcing rock faces

Country Status (1)

Country Link
DE (1) DE1965776A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2840967A1 (en) * 1977-09-21 1979-04-19 Cementa Ab METHOD FOR ANCHORING ELEMENTS AND DEVICE FOR IMPLEMENTING THE METHOD
US4537535A (en) * 1981-06-25 1985-08-27 Macbain John W Rock reinforcement
EP0164304B1 (en) * 1984-05-09 1988-10-19 HILTI Aktiengesellschaft Anchorage of an anchoraging element
EP1988196A1 (en) 2007-04-30 2008-11-05 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH Circular knitting machine with a replaceable needle cylinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2840967A1 (en) * 1977-09-21 1979-04-19 Cementa Ab METHOD FOR ANCHORING ELEMENTS AND DEVICE FOR IMPLEMENTING THE METHOD
US4537535A (en) * 1981-06-25 1985-08-27 Macbain John W Rock reinforcement
EP0164304B1 (en) * 1984-05-09 1988-10-19 HILTI Aktiengesellschaft Anchorage of an anchoraging element
EP1988196A1 (en) 2007-04-30 2008-11-05 SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH Circular knitting machine with a replaceable needle cylinder

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