EP0861986A1 - Pièce d'ancrage pour la roche ou le béton - Google Patents

Pièce d'ancrage pour la roche ou le béton Download PDF

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Publication number
EP0861986A1
EP0861986A1 EP98102801A EP98102801A EP0861986A1 EP 0861986 A1 EP0861986 A1 EP 0861986A1 EP 98102801 A EP98102801 A EP 98102801A EP 98102801 A EP98102801 A EP 98102801A EP 0861986 A1 EP0861986 A1 EP 0861986A1
Authority
EP
European Patent Office
Prior art keywords
concrete
nut
rock
rock anchor
anchor according
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
EP98102801A
Other languages
German (de)
English (en)
Other versions
EP0861986B1 (fr
Inventor
Edgar Kober
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.)
August Hitzbleck Sohne GmbH
Original Assignee
August Hitzbleck Sohne GmbH
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 August Hitzbleck Sohne GmbH filed Critical August Hitzbleck Sohne GmbH
Publication of EP0861986A1 publication Critical patent/EP0861986A1/fr
Application granted granted Critical
Publication of EP0861986B1 publication Critical patent/EP0861986B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D21/008—Anchoring or tensioning means

Definitions

  • the present invention relates to a rock or Concrete anchor with the features of the preamble of the claim 1.
  • the slot wedge anchor carries one at the end of its rod Slot, which when the anchor is driven in by an Bore-supported wedge is expanded.
  • the Widening ensures the necessary anchoring in the rock.
  • the disadvantage here is that the anchoring is only relative soft rock is good and the drilling depth is very good must be strictly observed so that the anchor is sufficient is expanded.
  • the expansion sleeve anchor has one of several at the upper end Slats existing expansion sleeve, into which by turning the Anchor rod a conical nut is pulled in while doing so the expansion slats are pressed against the borehole wall.
  • a setting tube required that the expansion sleeve towards the Cone nut presses. The setting tube must be used to set the anchor in the borehole will be inserted and after setting the anchor be removed again. This is considered in practice considered unfavorable.
  • the double wedge anchor has a two-part expansion body, formed by two diagonally cut cylinder halves that are in contact with each other with their cut surface.
  • the the smaller wedge is screwed to the anchor rod. Becomes rotated this, the wedge body moves down and pulls against the second wedge, which is the result of a Only move the stop on the anchor head transversely and thereby in Mountains can get stuck.
  • double wedge anchors only wear two opposite surfaces of the double wedge. Here is just one of the two wedges to increase friction ribbed while the other wedge must be smooth because it is on the bore wall slides. The holding force achieved and the Spreading of the double wedge anchor is in some Use cases not sufficient.
  • the abutment for axial support of the threaded rod can extend into the area of the threaded hole Slats with their end adjacent to the bottom of the hole support directly against the threaded rod. It is there particularly easy if the slats each have at least one Have approach that radially overlaps the cone and after is directed inside. It also simplifies Production of the fins when the abutment with the assigned slat is in one piece. It can also be provided be that the slats are a common abutment, for example in the form of a disc inserted from the inside, carry.
  • the threaded rod can, after securely anchoring the anchor, what the Support must be sufficient, the threaded rod through the Anchor are screwed further into the hole and thus directly for fastening plates or the like to be used.
  • each lamella facing away surface of each lamella is at least one in The circumferential groove carries that with all slats together results in a circumferential ring groove.
  • an elastic band can be used, which holds the fins around the cone nut.
  • an in Circumferential direction groove can be provided, in the one Spring means is inserted.
  • This spring means pushes the Slats in the area of the thinner end of the cone nut outside and ensures a reliable system on the Hole wall at the first moment of spreading.
  • FIG. 1 shows an embodiment of a rock anchor according to the invention shown in perspective.
  • the Rock anchor comprises three slats 1, the outside of one approximately hexagonal cone nut 2.
  • the slats 1 point outside a partially cylindrical surface, which in this Embodiment with an approximately center outside on the Surface provided, circumferential groove 3 is provided.
  • the slats 1 each carry a Cone nut 2, radial abutment 4.
  • the abutment 4 of each lamella 1 lies in the Unspread position according to Figure 1 on the front of the Cone nut 2.
  • the rock anchor according to FIG. 1 is in one spread or expanded position shown. Same Components have the same reference numbers as in the figure 1.
  • the Cone nut 2 has approximately hexagonal shape and in has substantially flat outer surfaces 5 which are at an angle of about 120 ° to each other.
  • the cone nut 2 is at its end 6 adjacent to the abutments 4 of the slats 1 slightly larger in diameter than on the abutments 4 opposite end.
  • the cone nut 2 has an axial inside Threaded hole 7 for screwing in the usual anchor rods.
  • the lamellae 1 face the cone nut Inside two roof-like angled surfaces 8 each are adapted at an angle to the outer surfaces 5 of the conical nut 2 and concern them.
  • the adjacent surfaces 5 and 8 of the cone nut 2 and the lamella 1 are smooth and can therefore slide on each other.
  • the circumferential groove 3 of three slats 1 complement each other to form a rotating one Ring in which an elastic ring 10, for example a Rubber ring, is inserted. This rubber ring 10 holds the Slats around the cone nut 2.
  • FIG. 3 shows the conical nut 2 and two lamellae 1 shown in a kind of exploded view. Same Reference numbers in turn designate the same features. Because of the The third louvre 1 was made more clear omitted.
  • the Cone nut 2 between two adjacent surfaces 2 carries a rib 11 which is integral with the conical nut 2 is connected and with a rectangular cross-section over the full axial length of the conical nut 2 runs.
  • the rib 11 prevents unintentional twisting of the cone nut 2 inside the slats 1 and thus ensures the flawless Orientation of the abutting surfaces 5 and 8 is advantageous for secure anchoring.
  • the rock anchor according to FIGS. 1 to 3 is in FIG unexpanded position shown in a borehole.
  • the illustration is an axial view of the Abutment 4 seen from the bottom of the hole.
  • the slats 1 are on the outside of the cone nut 2 and are there by the Rubber ring 10 held.
  • the rib 11 is between two Slats 1 and prevents the accidental rotation of the Cone nut 2.
  • the bore wall 15 surrounds the rock anchor from Outside. Inside the threaded hole 7 is for Anchoring required anchor rod 16 arranged.
  • FIG. 5 shows the one inserted into the bore 15 Rock anchors in a cross section from the side.
  • the rock anchor is in an unexpanded state, so that the Cone nut 2 with its end face 6 on the abutments 4 Slat 1 is in contact (only one slat is shown).
  • the Threaded rod 16 is so far into the threaded bore 6 screwed in that they are approximately flush with the end face 6 of the Cone nut 2 closes.
  • the one Abutment 4 adjacent groove 17 carries a rubber ring 19, the serves the slats 1 around the cone nut 2 hold together.
  • a rubber ring 20 is located in the groove 18, which is conical on the outside and which Abutment 4 facing a smaller extent than on the side facing away from the abutment 4.
  • the abutment 4 opposite side of the rubber ring 20 protrudes in the outer diameter beyond the slat 1 and is dimensioned so that it even if the rock anchor on the wall 15 is not spread Bore is present.
  • Rock anchor As follows: The rock anchor is with his Cone nut 2 and three fins 1 from one in the grooves 3 or 17 and 18 inserted rubber ring 10 or 19 and 20 in unexpanded position held together. In this Position with its threaded bore 7 on a Anchor rod 16 screwed on, at most, however, until the end face of the anchor rod 16 on the abutments 4 straight is present. Now the rock anchor can be drilled in hole 15 be inserted. If the desired depth for the Rock anchor is reached, the threaded rod 16 continues in the threaded hole 7 screwed in, against the Abutment 4 presses and the slats 1 against the Cone nut 2 moves axially.
  • the rock anchor can therefore by means of the threaded rod 16 without additional risers or the like in the bore 15 in of any depth. It is not one exact positioning with respect to the bottom of the hole additional aid for inserting or spreading the Rock anchor required.
  • the outer surfaces of the slats 1 are ribbed in the usual way, which in favor of Clarity of the figures is not shown. There with all external surfaces can be ribbed with this rock anchor, there is particularly good friction in the borehole.
  • a circumferential groove is provided in the again an elastic ring can be inserted. This Ring can then be provided, the slats 1 already in unexpanded state to some extent Lift off cone nut 2 and thus the friction in the bore when expanding for the first time.
  • the thickness or the material of the abutment 4 can be almost can be varied as required. It is particularly conceivable that the abutment 4 is designed so that it at one certain torque overcome by the threaded rod 16 can be. In such a case, when fixed Rock anchor the threaded rod 16 further into the bore 15 be screwed in so that with a possibly on the Anchor rod 16 existing screw head plates and the like to be attached to the outside of the rock can.
  • the rock anchor described so far, but also others Embodiments of this anchor according to the invention cannot serve only as a rock anchor, but also as a concrete anchor.
  • This Application of the anchor according to the invention is for Strength tests of concrete used. Here is essential that the pull-out force that the concrete anchor for Provides is higher than the corresponding strength of the concrete.
  • the anchor according to the invention ensures easy handling and simple construction very high Anchoring and pull-out forces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Dowels (AREA)
  • Piles And Underground Anchors (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
EP98102801A 1997-02-26 1998-02-18 Pièce d'ancrage pour la roche ou le béton Expired - Lifetime EP0861986B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19707542 1997-02-26
DE19707542A DE19707542A1 (de) 1997-02-26 1997-02-26 Fels- oder Betonanker

Publications (2)

Publication Number Publication Date
EP0861986A1 true EP0861986A1 (fr) 1998-09-02
EP0861986B1 EP0861986B1 (fr) 2000-05-31

Family

ID=7821439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98102801A Expired - Lifetime EP0861986B1 (fr) 1997-02-26 1998-02-18 Pièce d'ancrage pour la roche ou le béton

Country Status (3)

Country Link
EP (1) EP0861986B1 (fr)
AT (1) ATE193587T1 (fr)
DE (2) DE19707542A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10116447A1 (de) 2000-04-04 2001-12-06 Jennmar Corp Verbesserte Dreizinken-Hülse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352494A (en) * 1919-04-02 1920-09-14 Lothar R Zifferer Expansion-shield
FR80883E (fr) * 1961-12-20 1963-06-28 Tiges d'ancrage avec têtes extensibles pour mines, carrières, ou autres emplois
DE1201289B (de) * 1961-05-27 1965-09-23 Charles Leslie Emery Gebirgsanker
US4100748A (en) * 1977-01-07 1978-07-18 Stratabolt Corporation Mine roof or rock bolt expansion anchor of the bail type

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1352494A (en) * 1919-04-02 1920-09-14 Lothar R Zifferer Expansion-shield
DE1201289B (de) * 1961-05-27 1965-09-23 Charles Leslie Emery Gebirgsanker
FR80883E (fr) * 1961-12-20 1963-06-28 Tiges d'ancrage avec têtes extensibles pour mines, carrières, ou autres emplois
US4100748A (en) * 1977-01-07 1978-07-18 Stratabolt Corporation Mine roof or rock bolt expansion anchor of the bail type

Also Published As

Publication number Publication date
ATE193587T1 (de) 2000-06-15
DE59800161D1 (de) 2000-07-06
EP0861986B1 (fr) 2000-05-31
DE19707542A1 (de) 1998-08-27

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