US20090142142A1 - Self-drilling connection anchor - Google Patents

Self-drilling connection anchor Download PDF

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Publication number
US20090142142A1
US20090142142A1 US12/291,902 US29190208A US2009142142A1 US 20090142142 A1 US20090142142 A1 US 20090142142A1 US 29190208 A US29190208 A US 29190208A US 2009142142 A1 US2009142142 A1 US 2009142142A1
Authority
US
United States
Prior art keywords
anchor
tube
opening
inner tube
anchor tube
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.)
Abandoned
Application number
US12/291,902
Other languages
English (en)
Inventor
Michael Bayerl
Wolfgang Ludwig
Kolja Wieczorek
Kay Heemann
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.)
Hilti AG
Original Assignee
Hilti 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 Hilti AG filed Critical Hilti AG
Assigned to HILTI AKTIENGESELLSCHAFT reassignment HILTI AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BAYERL, MICHAEL, LUDWIG, WOLFGANG, WIECZOREK, KOLJA, HEEMANN, KAY
Publication of US20090142142A1 publication Critical patent/US20090142142A1/en
Abandoned 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
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • 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
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
    • 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
    • E21D21/0026—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/002—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting
    • F16B13/003—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose self-cutting with a separate drilling bit attached to or surrounded by the dowel element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/14—Non-metallic plugs or sleeves; Use of liquid, loose solid or kneadable material therefor
    • F16B13/141—Fixing plugs in holes by the use of settable material
    • F16B13/143—Fixing plugs in holes by the use of settable material using frangible cartridges or capsules containing the setting components

Definitions

  • the present invention relates to a self-drilling connection anchor including an anchor tube having a first end and a free second end, a drilling head provided at the first end, an inner tube arranged in the anchor tube and having an interior space for receiving an ejectable mass, a first axial, with respect to the longitudinal axis of the anchor, opening provided in a region of the second free end of the anchor tube and which communicates with the interior space of the inner tube, and at least one outlet opening provided in a region of the drilling head.
  • Self-drilling anchors of the type described above are used in mining and tunneling where they serve for securing hollow spaces such as tunnels, galleries, and the like. During formation of hollow spaces, mechanical characteristics and in particular the carrying capacity of rock layers are reduced. These rock layers are anchored to and are, thereby, are secured to further, remote, undamaged rock layers with the connection anchors.
  • connection anchor is drilled in the rock formation with a drilling tool. Stone, which is produced and crushed by the drilling head of the drill anchor which is provided a the boring direction-side end of the anchor, is removed through outlet openings, which are provided in a region of the drilling head, and the intermediate space between the bore wall and the outer circumference of the connection anchor.
  • a wet drilling process water is fed in the setting direction, and the removed and crushed stone is flushed out.
  • the removed and crushed stone is aspirated.
  • connection anchor In the second step, from the side of the connection anchor remote from the setting direction side, a chemical mass is ejected in the direction of the bore bottom with a press-out mechanism.
  • the mortar mass which is located in the connection anchor, is thereby brought in the bore from the connection anchor through the outlet opening and the drilling head and is distributed in the intermediate space between the bore wall and the outer circumference of the anchor tube.
  • German Publication DE 103 36 043 A1 discloses a self-drilling connection anchor of the type discussed above.
  • the disclosed connection anchor has an anchor tube at the first end of which a drilling head is provided, and a second free end.
  • an inner tube is arranged in the anchor tube.
  • an intermediate space extending along the longitudinal axis of the anchor tube at least in some regions and formed as an annular gap.
  • the intermediate space provides for feeding of water during a wet drilling process.
  • outer openings are provided and which communicate with the intermediate space and which are connectable with the interior space of the inner tube.
  • an ejectable mass which is packed in a foil bag, is located. The chemical mass can be delivered through the outlet openings in the drilling head.
  • a first opening that extends along the longitudinal axis and communicates with the intermediate space and the interior space of the inner tube.
  • An object of the present invention is to further improve a self-drilling connection anchor described in the German Publication DE 103 36 043 A1.
  • connection anchor rotates.
  • the at least one radial, second opening is provided in the anchor tube. This insures a good access to the radial, second opening from outside and that it opens directly in the intermediate space.
  • the at least one radial, second opening is spaced from the free second end of the anchor tube by a distance corresponding to from 0.5 to 2 times of an anchor tube diameter.
  • FIGURE shows a longitudinal cross-sectional view of a self-drilling connection anchor according to the present invention.
  • a self-drilling connection anchor 10 which is shown in the FIGURE, includes a steel anchor tube 11 and an inner tube 15 which is formed of steel or a plastic material and is arranged in the anchor tube 11 .
  • an ejectable mass 30 such as one-or multi-component chemical mass and which is packed in a foil bag 31 .
  • the anchor tube 11 has a first end 12 with a drilling head 13 inserted therein, and a free second end 14 .
  • the anchor tube 11 defines a longitudinal axis L of the connection anchor 10 .
  • a first centering element 24 and a second centering element 25 axially and radially retain the inner tube 15 in the anchor tube 11 , so that the inner tube 15 can be guided coaxially with respect to longitudinal axis L.
  • first opening 18 that communicates with the interior space 16 of the inner tube 15 .
  • a pressure medium e.g., water
  • first opening 18 a pressure medium e.g., water
  • first arrow 21 e.g., water
  • the foil bag 31 which is located in the inner tube 15
  • press-out member 33 displaceable in the inner tube 15 between the axial first opening 18 and the foil bag.
  • the mass 30 which is contained in the foil bag 31 , is displaced through a mixing member 32 , whereby the components of the mass 30 intermix.
  • the intermixed mass 30 can then be displaced in the direction of the second arrow 22 from the inner tube 15 or the mixing member 22 into the drilling head 13 and further through outlet opening 20 , which are provided in the drilling head 13 , into an outer space that surrounds the connection anchor 10 .
  • the centering element 24 , 25 so position the inner tube 15 in the anchor tube 11 that an intermediate space 17 in form of an annular gap is formed between the anchor tube 11 and the inner tube 15 .
  • an intermediate space 17 in form of an annular gap is formed between the anchor tube 11 and the inner tube 15 .
  • the radial openings 19 communicate with outlet openings 20 formed in the drilling head 13 via the intermediate space 17 .
  • the intermediate space 17 provides for feeding water in case of a wet drilling process. The water can flow through the radial second openings 19 into the intermediate space 17 (third arrow 23 ) and, finally, through the outlet openings 20 in the outer space of the connection anchor 10 .
  • the radial second openings 19 are preferably axially spaced by a distance A from the free second end 14 of the anchor tube 11 .
  • the distance A corresponds to form 0.5 to 2 times of the diameter D of the anchor tube 11 .
  • outlet openings 20 , the intermediate space 17 , and the radial second openings 19 can be used for aspirating bore dust during a dry drilling process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
US12/291,902 2007-11-30 2008-11-13 Self-drilling connection anchor Abandoned US20090142142A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007057763A DE102007057763A1 (de) 2007-11-30 2007-11-30 Selbstbohrender Verbundanker
DE102007057763.1 2007-11-30

Publications (1)

Publication Number Publication Date
US20090142142A1 true US20090142142A1 (en) 2009-06-04

Family

ID=40394054

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/291,902 Abandoned US20090142142A1 (en) 2007-11-30 2008-11-13 Self-drilling connection anchor

Country Status (7)

Country Link
US (1) US20090142142A1 (de)
EP (1) EP2065559A2 (de)
CN (1) CN101446202A (de)
AU (1) AU2008246268B2 (de)
DE (1) DE102007057763A1 (de)
NZ (1) NZ572920A (de)
ZA (1) ZA200810155B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120128444A1 (en) * 2010-11-11 2012-05-24 Richard Podesser Anchor Module for Mining and Tunneling
US20130004246A1 (en) * 2011-06-08 2013-01-03 Giddicca (Pty) Ltd Adhesive containing tubular rock anchor
WO2013072143A3 (de) * 2011-11-18 2013-11-21 Hilti Aktiengesellschaft Gesteinsanker
WO2021180983A1 (en) * 2020-03-13 2021-09-16 Tenax S.P.A. Rock reinforcement equipment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1392355B1 (it) * 2008-12-19 2012-02-28 Giamundo Dispositivo tubolare in materiale stabile non inquinante, preferibilmente vetroresina, da utilizzare nelle tecniche di consolidamento del fronte di scavo in galleria.

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270469A (en) * 1963-01-28 1966-09-06 Ct Ex De Rech S Et D Etudes Du Expansible, removable ground anchoring device
US3359742A (en) * 1962-07-30 1967-12-26 Swissboring Schweizerische Tie Method and apparatus for securing anchorage in loose and compact ground
US3494134A (en) * 1967-08-03 1970-02-10 Soletanche Ground anchor
US3735541A (en) * 1971-07-08 1973-05-29 W Vanderlinde Method and device for anchoring tie-rods in ground
US3855804A (en) * 1973-01-02 1974-12-24 Dyckerhoff & Widmmann Ag Apparatus and method for distending the distensible body of an earth anchor
US3946570A (en) * 1973-10-02 1976-03-30 S.E.F.I. Sondages-Etanchements-Forages-Injections Support and foundation composite pile for various works and method for manufacturing the same
US4402637A (en) * 1979-11-12 1983-09-06 Hilti Aktiengesellschaft Self-drilling dowel
US5152649A (en) * 1989-11-10 1992-10-06 Hilti Aktiengesellschaft Device for setting anchors
US6457910B1 (en) * 2000-04-10 2002-10-01 Hilti Aktiengesellschaft Tubular anchor
US6491478B2 (en) * 2000-04-10 2002-12-10 Hilti Aktiengesellschaft Tubular anchor
US20050047874A1 (en) * 2003-08-01 2005-03-03 Wolfgang Ludwig Bonding anchor
US6955504B2 (en) * 2003-01-20 2005-10-18 Hilti Aktiengesellschaft Attachment element
US7033117B2 (en) * 2003-08-01 2006-04-25 Hilti Aktiengesellschaft Rock anchor
US20070224015A1 (en) * 2006-03-22 2007-09-27 Hilti Aktiengesellschaft Fastening element
US20080031695A1 (en) * 2006-08-07 2008-02-07 Nasr Mamdouh A Method for installing a screw pile
US20080193225A1 (en) * 2007-02-14 2008-08-14 Cesare Melegari Equipment and method for constructing micropiles in soil, in particular for the anchorage of active anchors
US7484881B2 (en) * 2004-02-23 2009-02-03 Hilti Aktiengesellschaft Static mixer
US7591328B2 (en) * 2005-11-16 2009-09-22 Hilti Aktiengesellschaft Drilling and anchor setting tool

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359742A (en) * 1962-07-30 1967-12-26 Swissboring Schweizerische Tie Method and apparatus for securing anchorage in loose and compact ground
US3270469A (en) * 1963-01-28 1966-09-06 Ct Ex De Rech S Et D Etudes Du Expansible, removable ground anchoring device
US3494134A (en) * 1967-08-03 1970-02-10 Soletanche Ground anchor
US3735541A (en) * 1971-07-08 1973-05-29 W Vanderlinde Method and device for anchoring tie-rods in ground
US3855804A (en) * 1973-01-02 1974-12-24 Dyckerhoff & Widmmann Ag Apparatus and method for distending the distensible body of an earth anchor
US3946570A (en) * 1973-10-02 1976-03-30 S.E.F.I. Sondages-Etanchements-Forages-Injections Support and foundation composite pile for various works and method for manufacturing the same
US4402637A (en) * 1979-11-12 1983-09-06 Hilti Aktiengesellschaft Self-drilling dowel
US5152649A (en) * 1989-11-10 1992-10-06 Hilti Aktiengesellschaft Device for setting anchors
US6457910B1 (en) * 2000-04-10 2002-10-01 Hilti Aktiengesellschaft Tubular anchor
US6491478B2 (en) * 2000-04-10 2002-12-10 Hilti Aktiengesellschaft Tubular anchor
US6955504B2 (en) * 2003-01-20 2005-10-18 Hilti Aktiengesellschaft Attachment element
US20050047874A1 (en) * 2003-08-01 2005-03-03 Wolfgang Ludwig Bonding anchor
US7025538B2 (en) * 2003-08-01 2006-04-11 Hilti Aktiengesellschaft Bonding anchor
US7033117B2 (en) * 2003-08-01 2006-04-25 Hilti Aktiengesellschaft Rock anchor
US7484881B2 (en) * 2004-02-23 2009-02-03 Hilti Aktiengesellschaft Static mixer
US7591328B2 (en) * 2005-11-16 2009-09-22 Hilti Aktiengesellschaft Drilling and anchor setting tool
US20070224015A1 (en) * 2006-03-22 2007-09-27 Hilti Aktiengesellschaft Fastening element
US20080031695A1 (en) * 2006-08-07 2008-02-07 Nasr Mamdouh A Method for installing a screw pile
US20080193225A1 (en) * 2007-02-14 2008-08-14 Cesare Melegari Equipment and method for constructing micropiles in soil, in particular for the anchorage of active anchors

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120128444A1 (en) * 2010-11-11 2012-05-24 Richard Podesser Anchor Module for Mining and Tunneling
US20130004246A1 (en) * 2011-06-08 2013-01-03 Giddicca (Pty) Ltd Adhesive containing tubular rock anchor
US8985910B2 (en) * 2011-06-08 2015-03-24 Giddicca (Pty) Ltd Adhesive containing tubular rock anchor
US9200514B2 (en) 2011-06-08 2015-12-01 Giddicca (Pty) Ltd Tubular rock anchor
WO2013072143A3 (de) * 2011-11-18 2013-11-21 Hilti Aktiengesellschaft Gesteinsanker
AU2012339057B2 (en) * 2011-11-18 2017-09-14 DSI Underground Australia Pty Limited Rock anchor
WO2021180983A1 (en) * 2020-03-13 2021-09-16 Tenax S.P.A. Rock reinforcement equipment
WO2021181140A1 (en) * 2020-03-13 2021-09-16 Tenax S.P.A. Apparatus for rock reinforcement

Also Published As

Publication number Publication date
CN101446202A (zh) 2009-06-03
ZA200810155B (en) 2009-08-26
EP2065559A2 (de) 2009-06-03
AU2008246268B2 (en) 2011-06-09
AU2008246268A1 (en) 2009-06-18
DE102007057763A1 (de) 2009-06-04
NZ572920A (en) 2010-04-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HILTI AKTIENGESELLSCHAFT, LIECHTENSTEIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAYERL, MICHAEL;LUDWIG, WOLFGANG;WIECZOREK, KOLJA;AND OTHERS;REEL/FRAME:021902/0535;SIGNING DATES FROM 20081014 TO 20081021

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION