EP0532441A1 - Verfahren zur Konsolidierung von Tunnel- oder Streckenwänden oder dergleichen, Ankerstange zur Durchführung des Verfahrens, und Verfahren zur Herstellung solcher Ankerstangen - Google Patents

Verfahren zur Konsolidierung von Tunnel- oder Streckenwänden oder dergleichen, Ankerstange zur Durchführung des Verfahrens, und Verfahren zur Herstellung solcher Ankerstangen Download PDF

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Publication number
EP0532441A1
EP0532441A1 EP92440017A EP92440017A EP0532441A1 EP 0532441 A1 EP0532441 A1 EP 0532441A1 EP 92440017 A EP92440017 A EP 92440017A EP 92440017 A EP92440017 A EP 92440017A EP 0532441 A1 EP0532441 A1 EP 0532441A1
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EP
European Patent Office
Prior art keywords
rod
rock
tube
walls
anchor
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.)
Withdrawn
Application number
EP92440017A
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English (en)
French (fr)
Inventor
Alain Bernard
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.)
Techniport SA
Original Assignee
Techniport SA
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 Techniport SA filed Critical Techniport SA
Publication of EP0532441A1 publication Critical patent/EP0532441A1/de
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a method of consolidating walls of tunnels, galleries or the like, to an anchor rod authorizing the implementation of said method, as well as to a method of producing such anchor rods.
  • anchor rods also known as nails or anchor bolts
  • rods of about 30 millimeters in diameter are generally inserted, the length of which can go up to 6 meters, this at the rate of 3 to 6 rods per m2 of walls.
  • anchor bolts consisting of a substantially annular body split from one end to the other of its length, which will be introduced into conduits previously drilled in the wall of the rock, the diameter is substantially close to that of the bolt.
  • the body of the compressed anchor bolt is maintained so that it has a diameter substantially less than the diameter of said conduit.
  • the body is released from the anchor bolt, so that thanks to its elasticity it relaxes to come into contact with the surrounding rock wall and clings to it.
  • Another difficulty consists in maintaining the anchor bolt in the compressed state at the time of introduction. Furthermore, if the expansion force is low, and depending on the quality of the rocks, there is relative sliding between the bolt and the wall when the force applied to the bolt is high.
  • the object of the present invention is to propose a method of consolidating walls of tunnels, galleries or the like, as well as anchor rods allowing the implementation of said method which make it possible to overcome the drawbacks of known systems, in particular by causing less breakage during the drilling of the wall, and secondly by facilitating the implementation of the consolidation process.
  • Another object of the present invention is to provide anchor rods, intended for the consolidation of walls of tunnels, galleries or the like whose structure allows significant adhesion, the anchor rod installed in the wall being able to withstand stresses traction greater than 5 tonnes.
  • Another object of the present invention is to provide anchor rods, of simple structure, the production method of which is easy to implement.
  • Another object of the present invention is to provide an anchor rod whose structure allows the attachment to be distributed over the entire length while avoiding point anchor points at which the stresses would concentrate.
  • the anchor rod authorizing the implementation of the inventive method, is characterized in that it is in the form of a tube of which at least the outer casing has helical protuberances.
  • Figure 1 shows, by way of example, a sectional view of a gallery consolidated by anchor rods.
  • Figure 2 shows a sectional view of an anchor rod according to the present invention inserted into the rock to consolidate the wall.
  • FIG. 3 shows a view, partly in section, of the anchoring rod illustrated in FIG. 2.
  • Figures 4a and 4b illustrate a front view and a side view of an anchor rod according to the invention during its manufacture.
  • the invention relates to a method of consolidating walls of tunnels, galleries or the like, an anchor rod authorizing the implementation of said method, as well as a method of making such anchor rods.
  • the walls are consolidated by driving one or more anchor rods per m2 into the rock.
  • rods commonly have a diameter close to 30 millimeters and, depending on the nature of the rock and the consolidation to be carried out, have lengths of three to six meters.
  • Figure 1 schematically illustrates the implementation of such a consolidation of a gallery 1 by means of anchor rods 2 driven into the rock 3 forming the wall of the gallery.
  • Figure 2 shows a sectional view of an anchor rod 2 according to the invention inserted in the rock.
  • the rock 3 is drilled beforehand to constitute a conduit 5 of section "C" greater than that of said rods 2.
  • a hardenable grout 6 is injected inside the hollow rods 2 which crosses said rod 2 and then fills the space 7 between the rocky envelope of the conduit and the outside of rod 2.
  • the arrows simulate the injection of said curable grout that is introduced at the wall 4 at the inlet 8 of the tube 2, as shown by arrow 9.
  • This grout is then conveyed by the pipe formed by the internal part of the tube 2, as the arrow 10 simulates, to evacuate at the distal end 11 of the tube at the bottom of the conduit 5.
  • the curable grout is forced around the tube in the duct 5 towards the wall 4 of the gallery.
  • the coefficient of adhesion of the rod 2 is increased by deformation of its envelope.
  • the rod is twisted to create, at least on the outside, protrusions 15, while retaining a constant mean section for filling.
  • FIG. 3 shows a view with partial section of an anchor rod according to an embodiment of the present invention.
  • the rod is in the form of a tube 2, at least the outer envelope 16 of which has helical protuberances 15.
  • protrusions makes it possible to give a pitch to attachment zones over the entire length of the tube. In addition, these will also make it possible to strengthen the tube and prevent it from twisting along its longitudinal axis so that it remains rectilinear.
  • the helical deformation makes it possible to obtain a constant mean diameter, which will on the one hand promote the resistance of the tube and on the other hand the flow of the curable grout.
  • the helical deformation of the envelope will not cause point anchor thus avoiding localized stress concentrations and ruptures at this level.
  • the grout will circulate constantly during the filling phase and we will avoid "air bubbles" which could be caused in areas masked by large and protruding protrusions.
  • a cylindrical tube is twisted to reveal, at least outside the tube, a twist as shown diagrammatically in FIG. 3.
  • Figures 4 a and b show schematically the method of producing said anchor rod according to the present invention, and show in particular the tube 2 whose casing 16 is cylindrical at the start.
  • One of the ends of the tube, 11 for example, is immobilized, then a torque is applied to the other end, 8 in this case, until the said torsional deformation of the envelope is obtained.
  • the ends of the anchor rods at least on the wall side, have a thread which allows the fixing of a support plate on the rock, not shown in the figures.
  • one of the ends 8 is pushed back, so that a thread can be produced on the turned-down part 22.
  • This upsetting 22 will advantageously be carried out prior to the twisting deformation of the rod 2.
  • the thickness of the envelope 16 of the rod 2 is increased by hot delivery such that it is at least equal to the thickness nominal of the tube plus the depth of the thread.
  • the discharge "D" is such that a thread can be produced whose diameter at the bottom of the thread d is at least equal to " ⁇ e ". That is to say that below this diameter remains an amount of material equivalent to the thickness of the tube ( ⁇ e - ⁇ i ) / 2.

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  • 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)
  • Piles And Underground Anchors (AREA)
EP92440017A 1991-09-12 1992-02-10 Verfahren zur Konsolidierung von Tunnel- oder Streckenwänden oder dergleichen, Ankerstange zur Durchführung des Verfahrens, und Verfahren zur Herstellung solcher Ankerstangen Withdrawn EP0532441A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9111524 1991-09-12
FR9111524 1991-09-12

Publications (1)

Publication Number Publication Date
EP0532441A1 true EP0532441A1 (de) 1993-03-17

Family

ID=9417081

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92440017A Withdrawn EP0532441A1 (de) 1991-09-12 1992-02-10 Verfahren zur Konsolidierung von Tunnel- oder Streckenwänden oder dergleichen, Ankerstange zur Durchführung des Verfahrens, und Verfahren zur Herstellung solcher Ankerstangen

Country Status (1)

Country Link
EP (1) EP0532441A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060215A1 (en) * 1999-03-31 2000-10-12 Hydramatic Engineering Pty Limited Method and apparatus for insertion of rock bolts
GB2404710A (en) * 2000-12-21 2005-02-09 William Henry Ollis A masonry anchor
CN101956560B (zh) * 2009-07-11 2013-02-20 北京中煤矿山工程有限公司 一种用于立井地面预注浆工程的止浆塞安全脱离装置
CN110593903A (zh) * 2019-09-27 2019-12-20 中国矿业大学 一种新型注浆锚索支护方法及注浆锚索
WO2020087906A1 (zh) * 2018-11-02 2020-05-07 山东科技大学 一种锚杆 - 锚索协同变形受力的支护方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528706A (fr) * 1967-04-11 1968-06-14 Dispositif pour former par refoulement un épaississement sur l'extrémité d'un tube
DE2108264A1 (de) * 1970-02-18 1971-09-09 Williams, Chester Irving, Grand Ra pids Mich (V St A) Gesteinsbolzen
US4317353A (en) * 1979-12-26 1982-03-02 Delta T Limited Tube twisting apparatus
DE3403688C1 (de) * 1984-02-03 1985-09-19 Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum Gebirgsanker
FR2569765A1 (fr) * 1984-08-30 1986-03-07 Fip Ind Procede de consolidation d'un amas rocheux et appareil pour la mise en oeuvre de ce procede
DE3717024A1 (de) * 1987-05-21 1988-12-01 Willich F Gmbh & Co Vorrichtung zum bohren von bohrloechern und injizieren von verfestigungsmaterial

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528706A (fr) * 1967-04-11 1968-06-14 Dispositif pour former par refoulement un épaississement sur l'extrémité d'un tube
DE2108264A1 (de) * 1970-02-18 1971-09-09 Williams, Chester Irving, Grand Ra pids Mich (V St A) Gesteinsbolzen
US4317353A (en) * 1979-12-26 1982-03-02 Delta T Limited Tube twisting apparatus
DE3403688C1 (de) * 1984-02-03 1985-09-19 Bochumer Eisenhütte Heintzmann GmbH & Co KG, 4630 Bochum Gebirgsanker
FR2569765A1 (fr) * 1984-08-30 1986-03-07 Fip Ind Procede de consolidation d'un amas rocheux et appareil pour la mise en oeuvre de ce procede
DE3717024A1 (de) * 1987-05-21 1988-12-01 Willich F Gmbh & Co Vorrichtung zum bohren von bohrloechern und injizieren von verfestigungsmaterial

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060215A1 (en) * 1999-03-31 2000-10-12 Hydramatic Engineering Pty Limited Method and apparatus for insertion of rock bolts
GB2404710A (en) * 2000-12-21 2005-02-09 William Henry Ollis A masonry anchor
GB2404710B (en) * 2000-12-21 2005-04-20 William Henry Ollis Masonry anchor and method for installing a masonry anchor
CN101956560B (zh) * 2009-07-11 2013-02-20 北京中煤矿山工程有限公司 一种用于立井地面预注浆工程的止浆塞安全脱离装置
WO2020087906A1 (zh) * 2018-11-02 2020-05-07 山东科技大学 一种锚杆 - 锚索协同变形受力的支护方法
CN110593903A (zh) * 2019-09-27 2019-12-20 中国矿业大学 一种新型注浆锚索支护方法及注浆锚索
CN110593903B (zh) * 2019-09-27 2020-08-25 中国矿业大学 一种新型注浆锚索支护方法及注浆锚索

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