EP0220161B1 - Dispositif d'ancrage, notamment dispositif d'ancrage à expansion non restreinte - Google Patents

Dispositif d'ancrage, notamment dispositif d'ancrage à expansion non restreinte Download PDF

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Publication number
EP0220161B1
EP0220161B1 EP86890222A EP86890222A EP0220161B1 EP 0220161 B1 EP0220161 B1 EP 0220161B1 EP 86890222 A EP86890222 A EP 86890222A EP 86890222 A EP86890222 A EP 86890222A EP 0220161 B1 EP0220161 B1 EP 0220161B1
Authority
EP
European Patent Office
Prior art keywords
tube
tensioning
anchor
free
encasing
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
Application number
EP86890222A
Other languages
German (de)
English (en)
Other versions
EP0220161A1 (fr
Inventor
Hermann Dipl.-Ing. Thal
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.)
Vorspann Technik GmbH
Original Assignee
Vorspann Technik 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27147227&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0220161(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from AT0248185A external-priority patent/AT387056B/de
Priority claimed from AT0249985A external-priority patent/AT390461B/de
Application filed by Vorspann Technik GmbH filed Critical Vorspann Technik GmbH
Publication of EP0220161A1 publication Critical patent/EP0220161A1/fr
Application granted granted Critical
Publication of EP0220161B1 publication Critical patent/EP0220161B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material
    • 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
    • E21D21/006—Anchoring-bolts made of cables or wires
    • 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
    • E21D21/0073—Anchoring-bolts having an inflatable sleeve, e.g. hollow sleeve expanded by a fluid

Definitions

  • the invention relates to a free-play anchor, in which at least one tendon runs in a cladding tube.
  • Another object of the invention relates to a method for installing a free play anchor, with at least one tendon, in which the tendon is surrounded over the free span by a cladding tube and a subsequent trumpet, the free space between the tendon and the cladding tube with a corrosion-protecting material is filled out.
  • blocked anchors are those in which the space between the steel tension members and the surrounding cladding tube is pressed out and the steel tension members are firmly connected to the cladding tube after the cement suspension has hardened.
  • Such anchors can no longer expand unhindered due to the friction arising from the earth pressure on the cladding tube. It is therefore recommended to use these anchors only for subordinate structures, because after fixing the anchors and pressing with cement suspension, the functionality can no longer be checked, in particular the anchor forces can no longer be measured. The necessary, permanent statement about the safety of the anchored structure is no longer possible with blocked anchors.
  • Free play anchors are those in which the space between the steel tension members and the surrounding cladding tube is filled with permanently plastic masses in the area of the span length.
  • the longitudinal mobility of the steel tension members is retained because the permanently plastic masses create a largely frictionless connection to the cladding tube.
  • the steel tension members can therefore take on deformations and load changes along their entire length. Only petroleum-based greases, to which corrosion protection additives are added, are used.
  • the aim of the present invention is to prevent or at least significantly reduce this risk without having to accept the aforementioned risk of using the fats. At least the aim of the invention is to reduce this risk to an acceptable level.
  • This goal is achieved in that in the free-play anchor of the type mentioned at the outset, the cladding tube is longitudinally movable in the area of a desired longitudinal mobility of the tendon, preferably in the area of the free span length, in at least one second tube (sliding tube), and in that the cladding tube is connected to one at a time at least one-time overload of the tendon or the tendons beyond the preset prestressing force expandable cement block or the like. stretchable filling material is filled, which surrounds the tendon or the tendons.
  • the tendons in the form of strands are designated by 1. They are secured by means of wedges 2, e.g. Detachable hat wedges, fixed in an annular anchor body 3, which is supported on an anchor plate 5 via a two-part intermediate piece 4, which can also be designed as a threaded intermediate piece.
  • wedges 2 e.g. Detachable hat wedges
  • the parts of the tendons projecting over the wedges 2 are covered by sleeves 6 and end caps 7.
  • the previously mentioned parts are covered by a pot 8, which is attached to the anchor plate 5 and sealed against it.
  • the anchor plate 5 lies against an anchor wall 9, or the like between this and the ground, soil, rock. 10 a layer of filter concrete can be provided.
  • the tendons 1 are aligned in parallel by a deflecting ring 11 and extend over the area of their free span length to the anchoring area on the mountain side (FIG. 3).
  • a trumpet 12 extends from the inside of the anchor body 3 and is attached to the anchor body 3 by means of an angle ring 13.
  • This trumpet 12 is provided with an external thread at its inner (thinner) end and a sleeve 14 is screwed onto this thread, which extends into the interior of the borehole 15 somewhat expanded.
  • the trumpet 12 and the sleeve 14 can also form a possibly telescopic unit.
  • a protective tube 16 extends from the anchor plate 5 and is attached to the anchor plate 5 by means of a flange 17.
  • the flange 18 of a borehole lining 19 lies between this flange and the anchor wall 9.
  • the tendons 1 are surrounded at a distance by a cladding tube 20 which begins at a short distance from the inner end of the trumpet 12 and extends over the entire free span of the tendons 1.
  • the space enclosed by this cladding tube 20 is, like the interior of the trumpet, with an elastic-stretchable cement stone or the like. Filling material filled out.
  • This cement block or the filler material has the property of not forming any cracks or cracks if the tendons are overstretched beyond the preset prestressing force.
  • This property of the cement stone or the like. is achieved by an additive which gives the cement stone the property of being able to expand to a small extent.
  • plastics are preferably added, which are expediently present in dispersion form in the cement block.
  • an elastic additional material is proposed, which is e.g. a hardenable synthetic resin.
  • the additive material can be contained in the liquid state in amounts of 3 to 10% by weight, preferably 5% by weight.
  • the cladding tube 20 is surrounded over its entire length by a sliding tube 21 which is at a short distance from the cladding tube 20.
  • the opposite surfaces of the two tubes 20, 21 are smooth.
  • the sliding tube 21 protrudes both into the protective tube 16 and into the sleeve 14. Between the sliding tube 21 on the one hand and the protective tube 16 and the sleeve 14 on the other hand, sealing rings 22 and 23 are attached.
  • annular seal 24 is provided which extends between the sliding tube 21 and the lining 19.
  • a line 26 leads into the annular space 25 located between this seal 24 and the anchor plate 5 (or the flange 17) in order to be able to introduce filler into this annular space.
  • the outflow pipe 28 is provided to control the complete filling of this space; Only when filling material flows out of this tube is the space 25 completely filled.
  • a filling line (not shown) also leads into the annular space between the sleeve 14 and the protective tube 16.
  • the annular space between the cladding tube 20 and the sliding tube 21, which has only a very small thickness remains free or is filled with a permanently plastic mass in order to facilitate a mutual longitudinal movement between these two tubes. The amount of this permanently plastic mass is extremely small due to the very small distance between the tubes 20 and 21.
  • the inner end of the cladding tube 20 is pushed onto the stepped (tapered) end of a tube section 30 which passes through an elastically stretchable sealing bellows 31.
  • the space 32 enclosed by the bellows 31 and the pipe section 30 can be filled via the line 33 leading to the outside in order to bring the bellows into tight contact with the wall of the borehole 15.
  • a ring 34 which widens towards the end of the sliding tube 21, serves to fasten one end of the bellows 31; this expanded portion of the ring 34 is connected to the inner end of the sliding tube 21.
  • a corrugated tube 45 extends from the inner end of the tube section 30; but it is also possible to form the corrugated tube 45 and the tube section 30 as a coherent single piece.
  • the other end of the corrugated tube 45 is closed by a cap 36. It is advantageous to design the corrugations of the corrugated tube 45 in accordance with a single or multiple thread round thread; the correspondingly designed cap 36 can in this case be connected to the corrugated tube 45 by simply screwing on or screwing it on.
  • the possible connection between corrugated pipe 45 and pipe section 30 can also be simplified in this way.
  • an end plate 46 is provided, which is penetrated by the tendons 1 and a central filling tube 37 ending near the cap 36.
  • Another cover plate 48 is located in the cladding tube 20 near its inner end; the space between the two cover disks 46 and 48 can also be filled from the outside via a line (not shown).
  • the existing between the corrugated pipe 45 and the borehole 15, up to the bellows 31, the cavity 38 is filled with anchoring material in a conventional manner.
  • the annular space 39 lying between the bellows 31 and the seal 24 can also be filled from the outside via a line (not shown).
  • the lining 19 is cast in together with the pipes 26 and 28 in the manufacture of the concrete anchor plate.
  • the seal 24 consists, for example, of polyurethane foam.
  • a hardening material e.g. Cement mortar
  • the tendons are advantageously tensioned and wedged first. Only then is the free space between the tendons 1 and the cladding tube over the entire area of the free span, i.e. including trumpet 12 filled with a curable material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Claims (9)

1. Dispositif d'ancrage à expansion non restreinte, dans lequel un organe tendeur (1) au moins passe dans un tube (20) qui l'enveloppe, caractérise en ce que le tube enveloppe (20) est, dans la zone où l'organe tendeur (1) doit pouvoir se déplacer dans le sens longitudinal, de préférence dans la zone de la longueur de tension libre, guidé dans au moins un deuxième tube (tube de glissement) (21) de manière à s'y déplacer dans le sens longitudinal et en ce que le tube enveloppe (20) est rempli par un ciment ou une autre matière de remplissage expansible qui peut présenter une expansion sous l'action d'au moins une surcharge unique de l'organe ou des organes tendeurs dépassant la précontrainte réglée à l'avance et qui entoure l'organe ou les organes tendeurs.
2. Dispositif d'ancrage selon la revendication 1, caractérisé en ce que le tube enveloppe (20) et le tube de glissement (21) sont lisses sur leurs surfaces qui sont tournées l'une vers l'autre.
3. Dispositif d'ancrage selon la revendication 1, caractérisé en ce que l'extrémité extérieure du tube de glissement (21) est entourée, dans des conditions assurant l'étanchéité, par un tube de protection (16) qui part de la plaque d'ancrage (5) ou d'une partie analogue du dispositif d'ancrage.
4. Dispositif d'ancrage selon la revendication 3, caractérisé en ce qu'à l'intérieur du tube de protection (16) ce dernier comporte une douille (14) qui, d'une part, est séparée par un joint du tube enveloppe (20) et, d'autre part, est reliée à la trompette (12) qui entoure les extrémités des organes tendeurs (1) qui s'écartent les unes des autres, ce qui donne une trompette télescopique (12,14).
5. Dispositif d'ancrage selon la revendication 1, caractérisé en ce qu'il comprend, entre le tube enveloppe (20) et le tube de glissement (21), une masse de glissement.
6. Dispositif d'ancrage selon la revendication 5, caractérisé en ce que le ciment contient un produit d'addition qui le rend élastique.
7. Dispositif d'ancrage selon la revendication 6, caractérise en ce que le produit d'addition élastique n'a aucune influence sur les propriétés de protection contre la corrosion de la masse d'injection.
8. Dispositif d'ancrage selon l'une des revendications 5 ou 6, caractérise en ce que la proportion du produit d'addition dans la masse est, à l'état liquide, de 3 à 10 % en poids, de préférence de 5 % en poids.
9. Procédé de réalisation d'un dispositif d'ancrage à expansion non restreinte qui comporte au moins un organe tendeur (1) et dans lequel l'organe tendeur est, sur la longueur de tension libre, entouré par un tube enveloppe (20) et par une trompette (12) qui lui fait suite, l'espace libre compris entre l'organe tendeur et le tube enveloppe étant rempli par une matière assurant la protection contre la corrosion, caractérisé en ce qu'un tube de glissement (20) est engagé sur un tube enveloppe (21), ce qui permet un déplacement du tube enveloppe à l'intérieur du tube de glissement, après quoi l'organe tendeur est ancré dans le sol, dans les roches ou dans une base analogue et claveté à son extrémité libre pour l'ancrage, l'espace compris entre l'organe tendeur et le tube enveloppe et la trompette étant ensuite rempli par une matière qui peut présenter une expansion lorsque le ou les organes tendeurs sont soumis à au moins une surcharge unique dépassant la précontrainte réglée à l'avance.
EP86890222A 1985-08-26 1986-08-04 Dispositif d'ancrage, notamment dispositif d'ancrage à expansion non restreinte Expired - Lifetime EP0220161B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AT0248185A AT387056B (de) 1985-08-26 1985-08-26 Freispielanker
AT2481/85 1985-08-26
AT0249985A AT390461B (de) 1985-08-27 1985-08-27 Anker, insbesondere freispielanker
AT2499/85 1985-08-27
AT120186 1986-05-05
AT1201/86 1986-05-05

Publications (2)

Publication Number Publication Date
EP0220161A1 EP0220161A1 (fr) 1987-04-29
EP0220161B1 true EP0220161B1 (fr) 1990-04-25

Family

ID=27147227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86890222A Expired - Lifetime EP0220161B1 (fr) 1985-08-26 1986-08-04 Dispositif d'ancrage, notamment dispositif d'ancrage à expansion non restreinte

Country Status (3)

Country Link
EP (1) EP0220161B1 (fr)
AT (1) ATE52290T1 (fr)
DE (1) DE3670660D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844417A1 (de) * 1988-12-30 1990-07-05 Tgb Technogrundbau Gmbh Verfahren zum herstellen eines nachspannbaren verpressankers mit dauerkorrosionsschutz sowie dadurch hergestellter verpressanker

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316097A1 (de) * 1993-05-13 1994-11-17 Bauer Spezialtiefbau Verfahren und Vorrichtung zum Setzen eines Injektionsankers
DE9409363U1 (de) * 1994-06-09 1994-08-04 Bilfinger + Berger Bauaktiengesellschaft, 68165 Mannheim Abgedichtete Ankerdurchführung für Verbauwände
DE9416718U1 (de) * 1994-10-18 1994-12-15 Bilfinger + Berger Bauaktiengesellschaft, 68165 Mannheim Versenkte, abgedichtete Ankerdurchführung, insbesondere für Schlitzwände
DE29715363U1 (de) * 1997-08-27 1997-11-27 Dyckerhoff & Widmann AG, 81902 München Ankerelement für einen Verpreßanker
AT408473B (de) * 1998-10-20 2001-12-27 Vorspann Technik Gmbh Anker sowie bohrloch mit gesetztem anker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844417A1 (de) * 1988-12-30 1990-07-05 Tgb Technogrundbau Gmbh Verfahren zum herstellen eines nachspannbaren verpressankers mit dauerkorrosionsschutz sowie dadurch hergestellter verpressanker

Also Published As

Publication number Publication date
EP0220161A1 (fr) 1987-04-29
DE3670660D1 (de) 1990-05-31
ATE52290T1 (de) 1990-05-15

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