EP2085521B1 - Ancrage de terre ou de rocher doté d'une articulation de tirant d'ancrage composée d'un ou plusieurs éléments individuels ayant une formation de tête d'ancrage protégée contre la corrosion - Google Patents

Ancrage de terre ou de rocher doté d'une articulation de tirant d'ancrage composée d'un ou plusieurs éléments individuels ayant une formation de tête d'ancrage protégée contre la corrosion Download PDF

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Publication number
EP2085521B1
EP2085521B1 EP09000397.1A EP09000397A EP2085521B1 EP 2085521 B1 EP2085521 B1 EP 2085521B1 EP 09000397 A EP09000397 A EP 09000397A EP 2085521 B1 EP2085521 B1 EP 2085521B1
Authority
EP
European Patent Office
Prior art keywords
anchor
cap
closure means
anchoring
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.)
Not-in-force
Application number
EP09000397.1A
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German (de)
English (en)
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EP2085521A1 (fr
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.)
Dywidag Systems International GmbH
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Dywidag Systems International GmbH
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Publication date
Application filed by Dywidag Systems International GmbH filed Critical Dywidag Systems International GmbH
Publication of EP2085521A1 publication Critical patent/EP2085521A1/fr
Application granted granted Critical
Publication of EP2085521B1 publication Critical patent/EP2085521B1/fr
Not-in-force 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
    • E02D5/80—Ground anchors
    • 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
    • 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
    • E02D5/22—Piles
    • E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
    • 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
    • E02D5/805—Ground anchors with deformable anchoring members
    • 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
    • E21D21/0086—Bearing plates
    • 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
    • E21D21/0093—Accessories

Definitions

  • the invention relates to a Erd- or rock anchor with an Ankerzugglied of one or more individual elements and with a corrosion-protected anchor head training according to the preamble of claim 1.
  • Anchors are always used when it comes to initiate forces in the anchor head in deeper layers of soil.
  • generic anchor on an Ankerzugglied which may be formed for example by a single rod anchor, which has a continuous external thread as a rule.
  • Such anchors are known as rock bolts or pegs, which are brought either over their entire length by introducing an injection mortar in conjunction with the borehole wall and then braced or anchored as so-called free-play anchors only in the area of the borehole bottom and biased at the air-side end.
  • the tightening or pretensioning takes place by means of an anchor nut, which is screwed onto the thread of the bar anchor and is supported against an anchor plate.
  • Soil and rock anchors are used both for temporary and permanent use, the permanent use requires a design suitable for protection against corrosion constructive training.
  • a corrosion protection by coating the exposed parts with a corrosion protection compound, such as grease, achieved.
  • a cap enclosing the anchoring disc and the protruding ends of the steel wire strands is provided, which is filled with a corrosion protection compound and fastened to the anchor plate via an edge flange by means of screws.
  • the invention has the object to improve the structural design of the anchor head, in particular with a view to facilitate the assembly and disassembly.
  • the basic idea of the invention is to arrange the closure means for fastening the cap to the rest of the anchor head in an externally inaccessible area, for example in the protected area inside the cap.
  • This is done according to the invention by means of a connection element which concentrically surrounds the individual elements and is connected to a support element.
  • the connection element provides on its outer circumference first closure means, which cooperate with second closure means on the inner circumference of the cap.
  • the closure means are not impaired by subsequent external measures such as a protective coating or mechanical damage in their function.
  • the corrosion protection within the cap also ensures that the closure means are also protected against corrosion, so that their function is permanently maintained and also a release of the cap after many years is still possible without difficulty.
  • closure means are activated in the course of placing the cap, which can be done very quickly and therefore compared to the attachment by means of screws means a significant reduction in the workload.
  • an anchor according to the invention is characterized by an improved external appearance and entices third parties who are denied the view of the closure means, less to an abusive removal of the cap.
  • a constructive cap training can contribute, which requires the use of special tools for releasing the cap.
  • a recess or a projection with a polygonal cross-section can be arranged centrally on the cover of the screw cap, for example in the form of a regular four- or hexagonal cross-section into or onto which a correspondingly shaped tool engages.
  • the circumference of the screw cap may comprise means that can be brought into frictional engagement with a tool, for example, flat or profiled surfaces, which are suitable for applying a tool.
  • the connecting element consists of an attachable to the individual elements annular disc which is clamped between the anchor nut and anchor plate and occurs with its outer periphery in interaction with the closure means on the inner circumference of the cap.
  • the anchor plate serves as a support element.
  • connection element is formed by a one-piece from the anchor plate cylindrical projection, which brings advantages especially in the assembly of the anchor, since no own parts must be kept and handled.
  • the closure means for fastening the cap to the rest of the anchor head training preferably consist of a thread, in particular a coarse thread. This makes it possible to attach the cap quickly and safely on the anchor head.
  • the cap closes over its entire circumference frictionally and sealingly against the anchor plate.
  • connection element is arranged with the closure means on or on a dome plate.
  • the dome plate serves as a support element.
  • the invention therefore has a very broad field of application.
  • a further embodiment of the invention shows that it is also possible to arrange the closure means on the outer circumference of the cap.
  • the connecting element is formed by a circumferential collar which protrudes monolithically from the upper side of the annular disc, dome plate, anchor plate or anchoring disc and extend on the inner circumference of the complementary closure means.
  • FIG. 1 to 3 show a first embodiment of the invention, wherein the Fig. 1 and 3 also mutatis mutandis for the embodiments of the in the Fig. 4 to 8 Anchor head training shown apply, as far as the structural design allows.
  • rock anchor 1 which is arranged within a borehole 2.
  • the Ankerzugglied the rock anchor 1 consists of a single element in the form of a ribbed steel bar 3, the longitudinal axis of which carries the reference numeral 4.
  • the rock bolt 1 is anchored by means of a screwed onto the steel rod 3 expansion anchor 6 tensile.
  • the air-side end of the rock anchor 1 is formed by the anchor head 7, whose constructive structure on a larger scale in Fig. 2 is shown.
  • An armature plate 8 which covers the opening of the borehole 2 and can have a rectangular or round circumference and is provided with a central bore 9 for the passage of the steel bar 3 can be seen.
  • the anchor plate 8 With its underside, the anchor plate 8 is supported on the base 10, while the top 11 serves as a support for a concentric with the bore 9 arranged annular disc 12.
  • the annular disc 12 is threaded onto the free end of the steel rod 3 and has on its outer circumference closure means in the form of an external thread 13th
  • An anchor nut 14 is screwed onto the thread of the steel bar 3 and thereby clamps the annular disk 12 against the top 11 of the anchor plate 8, so that the Ring disc 12 rotatably between anchor nut 14 and anchor plate 8 is held on the steel bar 3.
  • the rock bolt 1 can be partially or completely surrounded by an injection material, in order to ensure corrosion protection within the borehole 2 in this way.
  • Fig. 3 shows a cap 17 according to the invention, which serves to produce the corrosion protection in the region of the anchor head 7.
  • the cap 17 is formed by a hollow cylinder 18, one end of which is closed by a lid 19. This results in a bell-shaped cavity 20.
  • the opening 21 facing the end of the cap 17 is formed by a threaded portion 22 which is provided with an internal thread 23.
  • the cavity 20 is filled with a corrosion protection compound 24.
  • Fig. 2 shows that such a cap 17 is pushed axially onto the anchor head 7 until the threaded portion 22 rests against the annular disc 12.
  • the projection 37 may also be formed by a correspondingly shaped depression or by correspondingly formed surfaces on the outer circumference of the hollow cylinder 18 of the cap 17.
  • Fig. 4 embodiment of the invention shown largely coincides with that already described.
  • the essential difference consists only in that the closure means are formed by a cylindrical projection 25, the in one piece from the top 11 of the anchor plate 8 emerges.
  • the projection 25 carries at its outer periphery a thread 13 which acts in the course of attachment of the cap 17 with its internal thread 23 as a closure means together.
  • a dome plate 26 interposed between a modified anchor plate 8 'and the anchoring means a dome plate 26 interposed.
  • the dome plate 26 has a crowned underside 27, which is supported relative to the modified anchor plate 8 '.
  • the modifications of the anchor plate 8 ' consist in an enlargement of the central bore 9' and spherical bearing surfaces 28 in the region of the contact joint to the dome plate 26. In this way forms the dome plate 26 together with the anchor plate 8 'a socket joint, the pivoting movements of the dome plate 26 against the Anchor plate 8 'allowed.
  • Fig. 5 shown embodiment of the invention has a dome plate 26 with a flat top 29, which serves to support an annular disc 12.
  • the annular disc 12 corresponds to that already described in the preceding embodiments and has a male thread 13 as a closure means.
  • the dome plate 26 has a central, to the bottom 27 stepwise or conically widening through hole 30 for the implementation of the steel bar 3. Otherwise, that applies among the Fig. 1 and 4 Said analogously.
  • Fig. 6 differs from the previously described in that as a connecting element instead of the loose annular disc 12 a cylindrical, integrally from the top 29 of the dome plate 26th worked out approach 39 is used, which has a thread 23 as a closure means on the outer circumference.
  • This embodiment thus corresponds, mutatis mutandis, in Fig. 4 so as to avoid repetition reference is made to the local part of the description.
  • FIG. 7 Another embodiment of the invention is in Fig. 7 shown.
  • a modified dome plate 26 ' which is supported on an anchor plate 8' and which is characterized by the circumference of the dome plate 26 'encircling, protruding from the top 29' collar 38.
  • the collar 38 On its inner side facing the longitudinal axis 4, the collar 38 is provided with closure means, for example with a thread, which cooperate on the outer circumference of the cap 17 'to produce a frictional connection with complementary closure means.
  • closure means for example with a thread
  • Fig. 8a and b show the implementation of the invention in an anchor 1 ', the Ankerzugglied several individual elements in the form of steel wire strands 31 has. Due to the existing symmetry with respect to the longitudinal axis 4 show the Fig. 8a and b for simplicity, only one half of the anchor head 7 '.
  • Both the in Fig. 8a as well as in Fig. 8b illustrated anchor 1 ' has a plurality of steel wire strands 31, which combined to form a bundle in the anchoring region of the borehole 2 occur.
  • the borehole 2 is bordered by an anchor plate 8, which is supported against the base 10 and which is provided with a central, aligned with the borehole 2 opening.
  • the anchor plate 8 serves as a bearing surface for a coaxially arranged anchor plate 32, which is provided with a number of through-holes corresponding to the number of steel wire strands 31, 31 conically widening in the direction of the ends of the steel wire strands.
  • the steel wire strands 31 are threaded through the through-holes and anchored in a known manner by means of conical anchoring wedges 33 arranged in the conical section of the through-holes.
  • first closure means for example a thread
  • second complementarily formed closure means on the inner circumference of the cap 17.
  • first closure means are not arranged on the anchor plate 8, but on the outer circumference of the anchoring disc 32, which in turn enter into a frictional connection with the second closure means on the inner circumference of the cap 17.

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  • 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 (14)

  1. Tirant d'ancrage au sol ou dans la roche, notamment tirant d'ancrage permanent, comprenant un organe de traction d'ancrage constitué d'un ou de plusieurs élément(s) individuel(s) (3, 31) comme, par exemple, des tiges d'acier, des filins d'acier ou des torons en acier, ledit organe de traction d'ancrage étant destiné à être inséré dans un trou foré (2) et à être ancré dans ce dernier ; un profil de tête d'ancrage (7), dévolu à l'ancrage dudit organe de traction au niveau de l'extrémité béante dudit trou foré (2), ledit profil de tête d'ancrage (7) étant pourvu d'un élément de contact (8, 26, 26') affecté à l'appui direct ou indirect contre la structure sous-jacente (10), et étant muni, par ailleurs, de moyens d'ancrage (14) qui sont affectés à la tension des éléments individuels (3) et peuvent être mis en liaison avec lesdits éléments individuels (3) par engagement positif, en prenant appui contre ledit élément de contact (8, 26, 26') ; et une coiffe (17) ceinturant lesdits moyens d'ancrage (14) et les extrémités desdits éléments individuels (3), au niveau de l'extrémité exposée de la tête d'ancrage (7), caractérisé par le fait qu'un élément de rattachement (12, 25, 38), interposé entre l'élément de contact (8, 26, 26') et les moyens d'ancrage (14), est doté de premiers moyens d'obturation à sa périphérie ; et par le fait que la coiffe (17) comporte, à sa périphérie, des seconds moyens d'obturation de configuration complémentaire, lesdits premiers et seconds moyens d'obturation coopérant mutuellement afin d'instaurer une liaison, par engagement positif, entre ladite coiffe (17) et ledit élément de rattachement (13, 25).
  2. Tirant d'ancrage selon la revendication 1, caractérisé par le fait que les premiers moyens d'obturation sont disposés sur le pourtour extérieur de l'élément de rattachement (12, 25), et les seconds moyens d'obturation sont disposés sur le pourtour intérieur de la coiffe (17).
  3. Tirant d'ancrage selon la revendication 1, caractérisé par le fait que l'élément de rattachement présente un collet circonférentiel (38) sur le pourtour intérieur duquel les premiers moyens d'obturation sont disposés, les seconds moyens d'obturation étant prévus sur le pourtour extérieur de la coiffe (17).
  4. Tirant d'ancrage selon l'une des revendications 1 à 3, caractérisé par le fait que l'élément de rattachement inclut un disque annulaire (12), enfilé et enchâssé entre l'élément de contact (8, 26) et les moyens d'ancrage (14).
  5. Tirant d'ancrage selon l'une des revendications 1 à 3, caractérisé par le fait que l'élément de rattachement inclut un appendice (25), cylindrique et creux, faisant saillie d'un seul tenant au-delà de la surface de contact (11) de l'élément de contact (8, 26), en ceinturant un ou plusieurs élément(s) individuel(s) (3).
  6. Tirant d'ancrage selon l'une des revendications 1 à 5, caractérisé par le fait que les premiers moyens d'obturation de l'élément de rattachement (12, 25, 38), et les seconds moyens d'obturation de la coiffe (17), sont constitués par des filetages coopérants (13,23).
  7. Tirant d'ancrage selon l'une des revendications 1 à 5, caractérisé par le fait que les premiers moyens d'obturation de l'élément de rattachement, et les seconds moyens d'obturation de la coiffe, forment une fermeture de type baïonnette.
  8. Tirant d'ancrage selon l'une des revendications 1 à 7, caractérisé par le fait que l'élément de contact est constitué d'une platine d'ancrage (8).
  9. Tirant d'ancrage selon l'une des revendications 1 à 7, caractérisé par le fait que l'élément de contact est constitué d'une platine (26) en forme de calotte.
  10. Tirant d'ancrage selon l'une des revendications 1 à 9, caractérisé par le fait que le moyen d'ancrage est constitué par un écrou d'ancrage (14) pouvant être vissé sur un filetage extérieur, à l'extrémité des éléments individuels (3).
  11. Tirant d'ancrage selon l'une des revendications 1 à 9, caractérisé par le fait que les moyens d'ancrage sont constitués d'un disque d'ancrage (32) pourvu de coins d'ancrage (33).
  12. Tirant d'ancrage selon l'une des revendications 1 à 11, caractérisé par le fait que la coiffe (17) présente, à la face extérieure, des moyens conçus pour l'engagement d'un outil.
  13. Tirant d'ancrage selon la revendication 12, caractérisé par le fait que les moyens sont constitués d'une creusure ou d'une protubérance centrée (37), rectangulaire ou hexagonale, située sur le couvercle de la coiffe (17).
  14. Tirant d'ancrage selon la revendication 12, caractérisé par le fait que les moyens sont constitués par des surfaces planes ou profilées, situées sur le pourtour de la coiffe (17).
EP09000397.1A 2008-01-28 2009-01-14 Ancrage de terre ou de rocher doté d'une articulation de tirant d'ancrage composée d'un ou plusieurs éléments individuels ayant une formation de tête d'ancrage protégée contre la corrosion Not-in-force EP2085521B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202008001248U DE202008001248U1 (de) 2008-01-28 2008-01-28 Erd- oder Felsanker mit einem Ankerzugglied aus einem oder mehreren Einzelelementen mit korrosionsgeschützter Ankerkopfausbildung

Publications (2)

Publication Number Publication Date
EP2085521A1 EP2085521A1 (fr) 2009-08-05
EP2085521B1 true EP2085521B1 (fr) 2015-08-26

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Application Number Title Priority Date Filing Date
EP09000397.1A Not-in-force EP2085521B1 (fr) 2008-01-28 2009-01-14 Ancrage de terre ou de rocher doté d'une articulation de tirant d'ancrage composée d'un ou plusieurs éléments individuels ayant une formation de tête d'ancrage protégée contre la corrosion

Country Status (8)

Country Link
US (1) US7967532B2 (fr)
EP (1) EP2085521B1 (fr)
JP (1) JP2009174309A (fr)
KR (1) KR20090082864A (fr)
AU (1) AU2009200236B2 (fr)
CA (1) CA2651242C (fr)
DE (1) DE202008001248U1 (fr)
ZA (1) ZA200900612B (fr)

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DE20311950U1 (de) * 2003-08-02 2004-12-09 Dywidag-Systems International Gmbh Korrosionsgeschütztes Zugglied, insbesondere Spannglied für Spannbeton
DE20314997U1 (de) 2003-09-27 2004-01-08 Dywidag-Systems International Gmbh Korrosionsgeschützter Verpressanker, insbesondere Felsdaueranker
GB0418545D0 (en) * 2004-08-19 2004-09-22 Univ Aberdeen Improved anchorage head assembly
JP4577893B2 (ja) * 2005-05-19 2010-11-10 岡部株式会社 グランドアンカーの頭部構造
EP1980712A1 (fr) * 2007-04-13 2008-10-15 Lipsker & Partners Engineering Services (1975) Ltd Cellule de chargement pour poteaux d'ancrage

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KR20090082864A (ko) 2009-07-31
AU2009200236A1 (en) 2009-08-13
CA2651242C (fr) 2012-03-27
US20090191005A1 (en) 2009-07-30
US7967532B2 (en) 2011-06-28
CA2651242A1 (fr) 2009-07-28
EP2085521A1 (fr) 2009-08-05
AU2009200236B2 (en) 2014-06-19
ZA200900612B (en) 2009-12-30
DE202008001248U1 (de) 2008-03-27
JP2009174309A (ja) 2009-08-06

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