EP2251526B1 - Elément de fixation auto-foreur - Google Patents

Elément de fixation auto-foreur Download PDF

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Publication number
EP2251526B1
EP2251526B1 EP10160697.8A EP10160697A EP2251526B1 EP 2251526 B1 EP2251526 B1 EP 2251526B1 EP 10160697 A EP10160697 A EP 10160697A EP 2251526 B1 EP2251526 B1 EP 2251526B1
Authority
EP
European Patent Office
Prior art keywords
reactive resin
tubular bag
formulation
hardener
fastener
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.)
Not-in-force
Application number
EP10160697.8A
Other languages
German (de)
English (en)
Other versions
EP2251526A3 (fr
EP2251526A2 (fr
Inventor
Kolja Wieczorek
Astrid Buder
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.)
DSI Underground Australia Pty Ltd
Original Assignee
Dywidag Systems International Pty Ltd
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 Dywidag Systems International Pty Ltd filed Critical Dywidag Systems International Pty Ltd
Priority to PL10160697T priority Critical patent/PL2251526T3/pl
Publication of EP2251526A2 publication Critical patent/EP2251526A2/fr
Publication of EP2251526A3 publication Critical patent/EP2251526A3/fr
Application granted granted Critical
Publication of EP2251526B1 publication Critical patent/EP2251526B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/025—Grouting with organic components, e.g. resin
    • E21D20/026—Cartridges; Grouting charges
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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 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
    • 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

Definitions

  • the invention relates to a self-drilling fastener, in particular a self-drilling rock anchor for chemical anchoring in a subsurface, such as a mountain or a component, for. B. of a mineral material, such as concrete or masonry.
  • Such fasteners serve to stabilize the walls of cavities, such as tunnels, galleries and the like, in such a way that adjacent to the wall mountain areas are secured together.
  • cavities such as tunnels, galleries and the like
  • fastening elements can also be used for connections for the transmission of high loads.
  • a disadvantage of the known solution is that first with a separate tool, a borehole must be created and the insertion of the two tubular bag is expensive in each hole.
  • the tubular bag may be inadvertently introduced into the well in the wrong order, so that upon insertion of the fastener first the tubular bag is destroyed with the rapidly curing composition and thus the correct setting of the fastener is no longer or only limited possible.
  • the fastening element has a hollow cylindrical receiving body which is provided at one end with a drill head and in which an expressible, hardenable multicomponent mass is provided.
  • the curable composition comprises a hardener and a reactive resin, which are stored separately from each other and cure in the mixed state. In the drill head through openings are provided for the hardenable mass.
  • the fastener according to the US 4,055,051 is drilled in the underground. After reaching the desired setting depth, the z. B. in a foil bag curable mass pressed out by pressure, which is mixed through the passage opening in the drill head to a mixture and placed in the space surrounding the fastener. After curing of the hardenable mass, the fastener is chemically anchored in the ground.
  • EP 0 163 019 a cartridge for multi-component wells for wells containing a hardness component and two different viscosity resin components.
  • a disadvantage of the known solution is that until the curing of the hardenable mass, the fastener is not resilient.
  • the object of the invention is to provide a chemically anchored fastener that is easy and safe settable and can be loaded quickly to a certain level.
  • At least the reactive resin comprises two different formulations which are arranged one behind the other, wherein the second formulation of the reactive resin, which cures rapidly in the mixed state with the at least one curing agent, is located behind the first formulation of the reactive resin with respect to the setting direction of the fastening element which hardens more slowly in the mixed state with the at least one hardener.
  • the first outflowing first mixture cures at moderate speed and ensures the afterflow of the second batch.
  • the effluent after the first batch second batch hardens faster than the first batch and advantageous immediately. This ensures that the fastener is anchored faster and safer in the ground, with the fast-curing mixture comes to rest in the area of the bottom of the hole, which ensures an advantageous introduction of force into the ground.
  • the reactive resin may also comprise more than two formulations which are arranged one behind the other.
  • the first outflowing mixture of the hardenable mass has a curing rate which is slower than the curing rate of the second outflowing mixture, and corresponding to the second batch following further mixtures a faster cure rate than the second outflowing mixture.
  • the hardenable mass is factory provided in the prefabricated with the drill head fastener, whereby a secure application of the fastener is guaranteed on site.
  • a mixing element is advantageously provided between the components of the hardenable mass and the at least one passage opening in the region of the drill head.
  • the passage openings in the drill head are designed such that when they pass through the components they are mixed with each other to a sufficient extent to the corresponding batch.
  • the self-drilling fastener can be used as an active anchor, d. H. as a prestressable anchor, as well as a passive anchor, d. H. as a non-preloaded anchor.
  • the drill motor and the ejection unit can be removed immediately after the complete application of the components of the hardenable mass and a next fastener can be set, as the at least partial anchoring of the fastener is achieved immediately after the complete extrusion process of the hardenable mass.
  • the setting effort in an active anchor as well as a passive anchor is significantly reduced compared to the previously known versions of chemically anchored fasteners. Furthermore, due to the different curing speeds of the mixture, such fastening elements can be set more independently of the temperature of the substrate, with which the self-drilling fastening element according to the invention can be used flexibly, in particular in tunnels or tunnels. Normally, hardening compounds are used on cold surfaces and slowly hardening compounds on hot or warm surfaces. Since the inventive fastener has both these types of curing compounds, a secure anchoring of the fastener is guaranteed in different substrates.
  • Suitable hardeners for the, advantageously free-radically curable or curing reaction resins are peroxy compounds, in particular dibenzoyl peroxide, used.
  • the same hardener is used in the fast as well as in the slowly hardening mixture.
  • the reactive resin is composed at least of a base resin, a reactive diluent and a hardening accelerator.
  • Reactive resins for use in curable compositions for the chemical anchoring of fasteners are known and z. B. in the DE 42 31 161 or the US 4,518,283 disclosed.
  • the curing time of the corresponding mixture is set by varying the ratios of these components to one another or the formulation of the reactive resin.
  • the different curing time or curing rate of the two formulations of the reactive resin is significantly determined by the amount of curing accelerator.
  • Suitable amines are, in particular, such as N, N-substituted anilines (for example N, N-dimethylanilene) or N, N-substituted para-toluidines (for example N, N-dimethyl-para-toluidine), but also Co-, Mn -Sn or Ce salts, such as cobalt octoate.
  • both formulations advantageously have further fillers, such as. As quartz, glass and hollow glass spheres, corundum, chalk, talc.
  • the mixing ratio of the reactive resin with the first formulation and the curing agent and the mixing ratio of the reactive resin with the second formulation and the curing agent are advantageously the same and are from 1: 1 to 10: 1, advantageously from 3: 1 to 5: 1.
  • the components of the curable composition are arranged in chambers of a tubular bag, which is easy to produce as a package and also can be easily arranged in the hollow cylindrical receiving body.
  • the tubular bag is a film bag, which is further advantageously formed from a tailored to the chemical properties of the components of the curable composition, multilayer film.
  • all components of the curable composition are arranged in a common tubular bag, which allows a simple production of the self-drilling fastener.
  • the tubular bag is advantageously formed from a sheet material, which is folded to form the required number of chambers and welded accordingly.
  • the different formulations of the reactive resin in a continuous, extending in the longitudinal direction of the tubular bag chamber of the tubular bag are arranged.
  • the tubular bag in cross section has an advantageous small size and is easy to produce.
  • a partition between the formulations is advantageously provided in the corresponding chamber of the tubular bag.
  • the partition is advantageous, for. B. under pressure, easy to open or destructible.
  • self-drilling fastener 11 here in the form of a rock anchor, has a hollow cylindrical receiving body 12, at a first, lying in the direction S end 13 a drill head 16 and at the opposite end 14 a rotary driving means 15, z. B. in the form of a detachable with a drill, not shown here, polygon.
  • the drill head 16 has a first passage opening 17 and two radially outwardly open second passage openings 19. Further, a funnel-shaped, tapered to the free end of the drill head 16 receptacle 18 is provided in the drill head 16.
  • an inner tube 21 is arranged, in which a packaged in a foil bag as a tubular bag 23, auspressbare and curable multi-component compound 26 is arranged.
  • the multi-component mass 26 comprises a reactive resin 28 and a hardener 27, which are stored separately from one another and which cure in the mixed state.
  • the hardener 27 is provided in the longitudinal extent of the tubular bag 23 extending, first chamber 24 of the tubular bag 23.
  • the reactive resin 28 is provided in a second chamber 25 of the tubular bag 23 extending parallel to the first chamber 24 and comprises a first formulation 29 and a second formulation 30 different from the first formulation 29 or different from the first formulation 29.
  • the first formulation 29 and the second formulation 30 are arranged one behind the other in the continuous, extending in the longitudinal direction of the tubular bag 23 second chamber 25 of the tubular bag 23.
  • a partition wall 33 which can be easily opened or destroyed under pressure in the second chamber 25 of the tubular bag 23 intended.
  • the second formulation 30 of the reactive resin 28, which cures rapidly in the mixed state with the hardener 27, is arranged with respect to the setting direction S of the fastening element 11 behind the first formulation 29 of the reactive resin 28, which hardens more slowly in the mixed state with the hardener 27.
  • Hardener 27 dibenzoyl 20.0% by weight water 30.0% by weight Quartz 0.01 to 0.03 mm 50.0% by weight
  • the mixing ratio of the first formulation 29 of the reactive resin 28 with the hardener 27 as well as the mixing ratio of the second formulation 30 of the reactive resin 28 with the hardener 27 is 3 parts to 1 part (3: 1).
  • a mixing element 31 which is displaceably mounted in the inner tube 21 and advantageously made of a plastic, is provided between the hardenable mass 26 and the drill head 16.
  • a squeezing piston 36 is provided in the inner tube 21 for squeezing the curable composition 26.
  • the fastener 11 is, as in FIG. 1 shown as a whole with a drilling / ejection unit, not shown here, which is coupled to the rotary driving means 15 of the receiving body 12, drilled into the substrate 6.
  • the squeezing unit 36 After reaching the desired drilling depth pressure is applied via the squeezing unit 36, for example by means of water as Druckbeetzschungsffen, wherein first the mixing element 31 is pushed in the direction of the drill head 16 until the free end of the mixing element 31 in the receptacle 18 of the drill head 16 to come to rest. Upon further pressurization of the mass 26 to be squeezed out via the squeezing piston 36, it flows out of the fastening element 11 through the passage openings 17 and 19 in the drill head 16.
  • the first slowly hardening mixture 41 first flows out of the fastening element 11 and fills the gap between the outer wall of the receiving body 12 and the borehole wall 7 from the bottom of the borehole.
  • the subsequently flowing out second mixture 42 which hardens quickly, displaces the first mixture 41 further in the direction of the second end 14 of the receiving body 12. Due to the fast curing second batch 42, the fastening element 11 is anchored in the region of the borehole bottom after the pressing out of the hardenable mass 26 and at least limited, e.g. B. for biasing the same, resilient. After the time-delayed curing of the first batch 41, the fastening element 11 is completely anchored in the substrate 6.

Claims (2)

  1. Elément de fixation (11) auto-foreur pour l'ancrage chimique dans un sol (6) avec un corps de réception (12) cylindrique creux qui présente à une extrémité (13) une tête de forage (16) et dans lequel une masse durcissable (26) à plusieurs composants pouvant être pressée est prévue, laquelle comprend au moins un durcisseur (27) et au moins une résine réactive (28) qui sont logés séparément l'un de l'autre et qui durcissent dans l'état mélangé, et dans lequel
    dans et/ou dans la zone de la tête de forage (16) au moins une ouverture de passage (17, 19) pour la masse durcissable (26) est prévue, caractérisé en ce qu'au moins la résine réactive (28) comprend deux formulations (29, 30) différentes qui sont agencées l'une derrière l'autre, dans lequel la seconde formulation (30) de la résine réactive (28) qui durcit rapidement dans l'état mélangé avec l'au moins un durcisseur (27), est agencée par rapport au sens de placement (S) de l'élément de fixation (11) derrière la première formulation (29) de la résine réactive (28) qui durcit plus lentement dans l'état mélangé avec l'au moins un durcisseur (27), dans lequel les composants de la masse durcissable (26) sont agencés dans des chambres (24, 25) d'un sachet tubulaire (23) et tous les composants de la masse durcissable (26) sont agencés dans un sachet tubulaire (23) commun.
  2. Elément de fixation selon la revendication 1, caractérisé en ce que les différentes formulations (29, 30) de la résine réactive (28) sont agencées dans une chambre (25) continue, s'étendant dans l'étendue longitudinale du sachet tubulaire (23), du sachet tubulaire (23).
EP10160697.8A 2009-05-08 2010-04-22 Elément de fixation auto-foreur Not-in-force EP2251526B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10160697T PL2251526T3 (pl) 2009-05-08 2010-04-22 Samowiercący element mocujący

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009002951A DE102009002951A1 (de) 2009-05-08 2009-05-08 Selbstbohrendes Befestigungselement

Publications (3)

Publication Number Publication Date
EP2251526A2 EP2251526A2 (fr) 2010-11-17
EP2251526A3 EP2251526A3 (fr) 2016-09-07
EP2251526B1 true EP2251526B1 (fr) 2017-12-20

Family

ID=42321179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160697.8A Not-in-force EP2251526B1 (fr) 2009-05-08 2010-04-22 Elément de fixation auto-foreur

Country Status (8)

Country Link
US (1) US20100284762A1 (fr)
EP (1) EP2251526B1 (fr)
AU (1) AU2010201788B2 (fr)
CA (1) CA2703432A1 (fr)
DE (1) DE102009002951A1 (fr)
PL (1) PL2251526T3 (fr)
RU (1) RU2010118034A (fr)
ZA (1) ZA201003259B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011005855A1 (de) * 2011-03-21 2012-09-27 Hilti Aktiengesellschaft Gesteinsanker
DE102011005960A1 (de) 2011-03-23 2012-09-27 Hilti Aktiengesellschaft Klebstoffpackung und deren Verwendung mit einem Verankerungselement
AU2012267199B2 (en) * 2011-06-07 2015-07-30 Fci Holdings Delaware, Inc Improvements in self-drilling rock bolts
AU2012203236B2 (en) * 2011-06-08 2015-02-19 Giddicca (Pty) Ltd An Adhesive Containing Tubular Rock Anchor
CA2777995C (fr) 2011-06-08 2018-10-30 Giddicca (Pty) Ltd Adhesif contenant un boulon d'ancrage tubulaire
DE102011078769A1 (de) 2011-07-07 2013-01-10 Hilti Aktiengesellschaft Gesteinsanker
WO2016029266A1 (fr) * 2014-08-28 2016-03-03 Stacey Kevin Frank Boulon d'ancrage et procédé de stabilisation d'excavations
AU2017218453B2 (en) * 2016-02-09 2022-08-04 DSI Underground Australia Pty Limited Rock bolt adapter
DE102020134867A1 (de) * 2020-12-23 2022-06-23 JMBG GmbH + Co KG Hohlstabverbundanker mit statischem Mischsystem
WO2022226592A1 (fr) * 2021-04-27 2022-11-03 Oka Rock Bolt Technologies Pty Limited Système d'injection de tête de forage pour ensemble boulon d'ancrage auto-foreur

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US3702060A (en) * 1971-02-25 1972-11-07 James Deans Cumming Resin-bonded expansion shell
US4055051A (en) 1976-01-08 1977-10-25 The United States Of America As Represented By The Secretary Of The Interior Unitary drill bit and roof bolt
US4303354A (en) 1979-03-28 1981-12-01 Peabody Coal Company Mine roof bolting
DE3226602A1 (de) 1982-07-16 1984-01-19 Hilti AG, 9494 Schaan Haertbare kunstharzmasse und deren verwendung
JPS59180000A (ja) * 1983-03-31 1984-10-12 東海ゴム工業株式会社 固定用カプセル
US4601614A (en) * 1984-02-22 1986-07-22 Lane William L Rockbolt
DE3416094A1 (de) * 1984-04-30 1985-10-31 Hilti Ag, Schaan Zerstoerbare patrone fuer mehrkomponenten-massen
US5051038A (en) * 1990-04-06 1991-09-24 Ingersoll-Rand Company Barrier plug for dynamic rock stabilizing fixture
DE4231161A1 (de) 1992-09-17 1994-03-24 Hilti Ag Mörtel und Vorrichtung zur Befestigung von Verankerungsmitteln in Bohrlöchern
DE10017763B4 (de) * 2000-04-10 2008-11-20 Hilti Aktiengesellschaft Gebirgsanker
DE10017751B4 (de) * 2000-04-10 2008-11-20 Hilti Aktiengesellschaft Gebirgsanker
DE10017750B4 (de) * 2000-04-10 2008-11-20 Hilti Aktiengesellschaft Gebirgsanker
DE10301968A1 (de) * 2003-01-20 2004-07-29 Hilti Ag Gebirgsanker
DE10336040B4 (de) * 2003-08-01 2006-12-28 Hilti Ag Adapter für einen selbstbohrenden Gebirgsanker
DE10336043B4 (de) * 2003-08-01 2006-12-14 Hilti Ag Verbundanker
CA2530323C (fr) * 2004-12-20 2013-01-29 Dywidag-Systems International Pty Limited Boulon d'ancrage

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Also Published As

Publication number Publication date
US20100284762A1 (en) 2010-11-11
EP2251526A3 (fr) 2016-09-07
AU2010201788B2 (en) 2012-04-19
EP2251526A2 (fr) 2010-11-17
ZA201003259B (en) 2011-04-28
AU2010201788A1 (en) 2010-11-25
PL2251526T3 (pl) 2018-07-31
RU2010118034A (ru) 2011-11-20
CA2703432A1 (fr) 2010-11-08
DE102009002951A1 (de) 2010-11-11

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