EP0578713B1 - Articulated anchor bolt - Google Patents

Articulated anchor bolt Download PDF

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Publication number
EP0578713B1
EP0578713B1 EP92908139A EP92908139A EP0578713B1 EP 0578713 B1 EP0578713 B1 EP 0578713B1 EP 92908139 A EP92908139 A EP 92908139A EP 92908139 A EP92908139 A EP 92908139A EP 0578713 B1 EP0578713 B1 EP 0578713B1
Authority
EP
European Patent Office
Prior art keywords
rope
anchor bolt
sections
cable
bolt
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
EP92908139A
Other languages
German (de)
French (fr)
Other versions
EP0578713A1 (en
Inventor
Peter Stephan
Gerhard Klausen
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.)
Bergwerksverband GmbH
Original Assignee
Bergwerksverband 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
Application filed by Bergwerksverband GmbH filed Critical Bergwerksverband GmbH
Publication of EP0578713A1 publication Critical patent/EP0578713A1/en
Application granted granted Critical
Publication of EP0578713B1 publication Critical patent/EP0578713B1/en
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
    • 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
    • E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
    • 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

Definitions

  • the invention relates to a link anchor which consists of anchoring sections arranged one behind the other and connected to one another by means of cable joints, which has a pressing sleeve at one end and an anchoring section which is designed as a pressing part and is provided with an assembly thread and is fully mortarable over its installation length.
  • the generic link anchor is a test object from French mining.
  • Such a link anchor has been developed in particular for use in such boreholes in which continuous anchor rods could not be inserted due to space constraints.
  • the rod-shaped anchor sections which have taken up rope sections designed as rope joints in bores in pressed form, it has proven to be very disadvantageous that the low elasticity and thus the low workability until breakage are not suitable for all applications .
  • DE-A 39 22 906 describes a non-mortarable mountain cable anchor in which the cable is mechanically braced in a sheathing tube made of rigid, interlocking segments that protect the cable from transverse forces.
  • the object of the present invention based on the generic link anchor that can be mortared over the entire length, is to create a link anchor which has both sufficient elasticity and a corresponding ability to work.
  • the link anchor according to the invention is given a comparatively large load path under approximately constant load conditions by the resilience element in the deepest borehole before, after the resilience has been exhausted, a load up to the breaking strength of the rope takes place. It can therefore also be used in mountain conditions that lead to a stronger loosening of the mountains around a cavity.
  • an example of a preferred embodiment of a flexible, flexible link anchor 10 according to the invention is shown in a longitudinal section. It consists in the example of a steel cable 1, the between cable joints 2 with cladding tube sections 3, 11, 14, z. B. is surrounded by steel.
  • the cladding tube sections 3, 11, 14 are fixed at certain intervals on the steel cable 1 by cold deformation embossing 4.
  • the steel cable 1 is in a pressing part 6 of the cladding tube section 14 at the other end of the cable at the hole end pressed, which also carries the full breaking force, and which is provided with a mounting thread 7 for mounting an anchor plate 12 by means of a nut 13.
  • a compliance path 8 is provided, which with an easily destructible tubular body 9, for. B. made of plastic or thin sheet metal is covered.
  • the link anchor according to the invention is fastened as intended by introducing mortar into the spaces between the borehole wall and the link anchor.
  • the operation of the link anchor 10 according to the invention is as follows: When opening fracture areas or shear movements in the mountain body after being introduced into a borehole, the link anchor 10 initially takes up load until the friction between the fixed cladding tube sections 3, 11, 14 and the steel cable 1 is overcome . Then the compliance path 8 is exhausted until the compression sleeve 5 comes to rest on the uppermost cladding tube section 11. Then the link anchor 10 is loaded up to the breaking strength of the steel cable 1.

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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)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention concerns an articulated anchor bolt made up of sections connected to each other by a rope in such a way that rope articulations are formed between the sections. The anchor bolt also includes a section with a thread for fitting the tie plate, and is fully cement-stabilizable along its whole length in accordance with applicable regulations. The anchor bolt (10) is made up of tubular casing sections (3, 11, 14) in which a continuous steel wire rope (1) is housed, thus forming a multiplicity of articulations (2). The casing sections (3, 11, 14) are fixed to the rope (1) by cold-stamping (4). Fitted to one end of the rope (1) is a permanently fixed sleeve (5), and to the other end a permanently fixed element with a fitting thread (7). Located between the sleeve (5) and the nearest casing section (11) is a destructible tubular element (9) which gives the anchor bolt greater resilience in this zone (8).

Description

Die Erfindung betrifft einen Gliederanker, der aus hintereinander angeordneten und über Seilgelenke miteinander verbundenen Ankerabschnitten besteht, der an einem Ende eine Verpreßhülse und am anderen Ende einen als Verpreßteil ausgebildeten, mit einem Montagegewinde versehenen Ankerabschnitt aufweist, und der auf seiner Einbaulänge voll vermörtelbar ist.The invention relates to a link anchor which consists of anchoring sections arranged one behind the other and connected to one another by means of cable joints, which has a pressing sleeve at one end and an anchoring section which is designed as a pressing part and is provided with an assembly thread and is fully mortarable over its installation length.

Bei dem gattungsgemäßen Gliederanker handelt es sich um ein Versuchsobjekt aus dem französischen Bergbau. Ein derartiger Gliederanker ist insbesondere für eine Verwendung in solchen Bohrlöchern entwickelt worden, in denen durchgehende Ankerstangen aus Platzgründen nicht eingebracht werden konnten. Bei einer derartigen Gliederankergestaltung, bei denen die stabförmigen Ankerabschnitte, die als Seilgelenke ausgebildetete Seilabschnitte in Bohrungen in verpreßter Form aufgenommen haben, hat es sich als sehr nachteilig erwiesen, daß das geringe Dehnvermögen und damit die geringe Arbeitsfähigkeit bis zum Bruch nicht für alle Anwendungsfälle geeignet sind.The generic link anchor is a test object from French mining. Such a link anchor has been developed in particular for use in such boreholes in which continuous anchor rods could not be inserted due to space constraints. In such a link anchor design, in which the rod-shaped anchor sections, which have taken up rope sections designed as rope joints in bores in pressed form, it has proven to be very disadvantageous that the low elasticity and thus the low workability until breakage are not suitable for all applications .

In der DE-A 39 22 906 ist ein nicht vermörtelbarer Gebirgsseilanker beschrieben, bei dem das Seil in einem aus biegesteifen, das Seil vor Querkräften schützenden, formschlüssig ineinandergreifenden Segmenten bestehenden Hüllrohr mechanisch verspannbar gelagert ist.DE-A 39 22 906 describes a non-mortarable mountain cable anchor in which the cable is mechanically braced in a sheathing tube made of rigid, interlocking segments that protect the cable from transverse forces.

Der vorliegenden Erfindung liegt, ausgehend von dem gattungsgemäßen, über die gesamte Länge einmörtelbaren Gliederanker, die Aufgabe zugrunde, einen Gliederanker zu schaffen, der sowohl ein ausreichendes Dehnvermögen wie auch eine entsprechende Arbeitsfähigkeit aufweist.The object of the present invention, based on the generic link anchor that can be mortared over the entire length, is to create a link anchor which has both sufficient elasticity and a corresponding ability to work.

Diese Aufgabe wird durch einen Gliederanker gelöst, der die kennzeichnenden Merkmale des Patentanspruchs aufweist.This object is achieved by a link anchor which has the characterizing features of the patent claim.

Der erfindungsgemäße Gliederanker erhält durch das Nachgiebigkeitselement im Bohrlochtiefsten einen vergleichsweise großen Lastweg unter in etwa konstanten Lastbedingungen, bevor nach Erschöpfung der Nachgiebigkeit eine Auflastung bis zur Bruchkraft des Seiles erfolgt. Er läßt sich somit auch bei Gebirgsverhältnissen anwenden, die eine stärkere Auflockerung des Gebirges um einen Hohlraum erwarten lassen.The link anchor according to the invention is given a comparatively large load path under approximately constant load conditions by the resilience element in the deepest borehole before, after the resilience has been exhausted, a load up to the breaking strength of the rope takes place. It can therefore also be used in mountain conditions that lead to a stronger loosening of the mountains around a cavity.

Der erfindungsgemäße Gliederanker ist in der Figur der Zeichnung dargestellt und erläutert.The link anchor according to the invention is shown and explained in the figure of the drawing.

In der Figur ist ein Beispiel für eine bevorzugte Ausgestaltung eines erfindungsgemäßen, nachgiebigen, flexiblen Gliederankers 10 in einem Längsschnitt dargestellt. Er besteht im Beispiel aus einem Stahlseil 1, das zwischen Seilgelenken 2 mit Hüllrohrabschnitten 3, 11, 14, z. B. aus Stahl, umgeben ist. Die Hüllrohrabschnitte 3, 11, 14 sind in bestimmten Abständen durch Kaltverformungsprägungen 4 auf dem Stahlseil 1 fixiert. Zum Zweck der Verankerung im Bohrlochtiefsten befindet sich an einem Seilende eine Verpreßhülse 5, die die volle Bruchkraft des Stahlseiles 1 aufnehmen kann. Am bohrlochmundseitigen anderen Seilende ist das Stahlseil 1, in einem Verpreßteil 6 des Hüllrohrabschnitts 14 verpreßt, das ebenfalls die volle Bruchkraft trägt, und das mit einem Montagegewinde 7 zur Montage einer Ankerplatte 12 mittels einer Mutter 13 versehen ist.In the figure, an example of a preferred embodiment of a flexible, flexible link anchor 10 according to the invention is shown in a longitudinal section. It consists in the example of a steel cable 1, the between cable joints 2 with cladding tube sections 3, 11, 14, z. B. is surrounded by steel. The cladding tube sections 3, 11, 14 are fixed at certain intervals on the steel cable 1 by cold deformation embossing 4. For the purpose of anchoring in the deepest borehole there is a compression sleeve 5 at one end of the rope which can absorb the full breaking force of the steel rope 1. The steel cable 1 is in a pressing part 6 of the cladding tube section 14 at the other end of the cable at the hole end pressed, which also carries the full breaking force, and which is provided with a mounting thread 7 for mounting an anchor plate 12 by means of a nut 13.

Zwischen der Verpreßhülse 5 und dem Hüllrohrabschnitt 11 im Bohrlochtiefsten ist eine Nachgiebigkeitsstrecke 8 vorgesehen, die mit einem leicht zerstörbaren Rohrkörper 9, z. B. aus Kunststoff oder dünnem Blech, abgedeckt ist. Nach dem Einbringen in das Bohrloch wird der erfindungsgemäße Gliederanker bestimmungsgemäß durch Einbringen von Mörtel in die Zwischenräume zwischen Bohrlochwand und Gliederanker befestigt.Between the compression sleeve 5 and the cladding tube section 11 deepest in the borehole, a compliance path 8 is provided, which with an easily destructible tubular body 9, for. B. made of plastic or thin sheet metal is covered. After it has been introduced into the borehole, the link anchor according to the invention is fastened as intended by introducing mortar into the spaces between the borehole wall and the link anchor.

Die Funktionsweise des erfindungsgemäßen Gliederankers 10 ist folgende: Beim Öffnen von Kluftflächen oder bei Scherbewegungen im Gebirgskörper nach dem Einbringen in ein Bohrloch nimmt der Gliederanker 10 zunächst Last auf, bis die Reibung zwischen den fixierten Hüllrohrabschnitten 3, 11, 14 und dem Stahlseil 1 überwunden wird. Anschließend wird der Nachgiebigkeitsweg 8 ausgeschöpft, bis die Verpreßhülse 5 am obersten Hüllrohrabschnitt 11 zur Anlage kommt. Danach lastet der Gliederanker 10 bis zur Bruchkraft des Stahlseiles 1 auf.The operation of the link anchor 10 according to the invention is as follows: When opening fracture areas or shear movements in the mountain body after being introduced into a borehole, the link anchor 10 initially takes up load until the friction between the fixed cladding tube sections 3, 11, 14 and the steel cable 1 is overcome . Then the compliance path 8 is exhausted until the compression sleeve 5 comes to rest on the uppermost cladding tube section 11. Then the link anchor 10 is loaded up to the breaking strength of the steel cable 1.

BezugszeichenlisteReference list

  • 1 Stahlseil1 steel rope
  • 2 Seilgelenk2 rope joint
  • 3 Hüllrohrabschnitt3 cladding tube section
  • 4 Kaltverformungsprägung4 Cold stamping
  • 5 Verpreßhülse5 compression sleeve
  • 6 Verpreßteil6 grouting part
  • 7 Montagegewinde7 mounting threads
  • 8 Nachgiebigkeitsstrecke8 compliance route
  • 9 Rohrkörper9 tubular body
  • 10 Gliederanker10 link anchors
  • 11 Hüllrohrabschnitt11 cladding tube section
  • 12 Ankerplatte12 anchor plate
  • 13 Mutter13 mother
  • 14 Hüllrohrabschnitt14 cladding tube section

Claims (1)

  1. An articulated anchor bolt, comprising bolt segments arranged one behind another and interconnected by steel-cable joints (2), having at one end a pressed sleeve (5) and at the other end a bolt segment formed as a pressed part (6) and provided with a mounting thread (7), and being fully cementable along its insertion length, characterised in that the bolt segments are formed as tubular jacket segments (3, 11, 14) and the cable joints (2) are formed by means of a continuous steel cable (1), the tubular jacket segments (3, 11, 14) being fixed to the steel cable (1) by cold-forming impressions (4), and in that a destructible tubular member (9) is arranged, as a resilient section (8), between the pressed sleeve (5) and the first succeeding tubular jacket segment (11).
EP92908139A 1991-04-12 1992-04-03 Articulated anchor bolt Expired - Lifetime EP0578713B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4112096A DE4112096C1 (en) 1991-04-12 1991-04-12
DE4112096 1991-04-12
PCT/EP1992/000748 WO1992018752A1 (en) 1991-04-12 1992-04-03 Articulated anchor bolt

Publications (2)

Publication Number Publication Date
EP0578713A1 EP0578713A1 (en) 1994-01-19
EP0578713B1 true EP0578713B1 (en) 1996-05-22

Family

ID=6429509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92908139A Expired - Lifetime EP0578713B1 (en) 1991-04-12 1992-04-03 Articulated anchor bolt

Country Status (6)

Country Link
EP (1) EP0578713B1 (en)
AT (1) ATE138448T1 (en)
AU (1) AU650126B2 (en)
DE (1) DE4112096C1 (en)
PL (1) PL168768B1 (en)
WO (1) WO1992018752A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006105557A1 (en) * 2005-03-29 2006-10-05 Grinaker-Lta Limited Rock anchor
ITVI20120052A1 (en) * 2012-03-07 2013-09-08 Dalla Gassa Srl METHOD OF REALIZATION OF A CONSOLIDATION AND CONTAINMENT STRUCTURE OF LAND SUBJECT TO MOVEMENTS AND CONSTRUCTION STRUCTURE AND CONSOLIDATION ACHIEVED BY SUCH METHOD
WO2016210456A2 (en) * 2015-06-23 2016-12-29 Ncm Innovations (Pty) Ltd Grout delivery system
CN108589722A (en) * 2018-06-05 2018-09-28 重庆科技学院 A kind of one-shot forming apparatus and method of extruding type soil bolt
CN110644944B (en) * 2019-08-26 2021-05-18 中煤科工集团西安研究院有限公司 Outer flat type high-pressure rotary jet grouting device and method for complex stratum under coal mine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510997C1 (en) * 1985-03-27 1986-06-05 Ruhrkohle Ag, 4300 Essen Yielding roof bolt
DE3922906A1 (en) * 1989-07-12 1991-01-24 Klaus Ketterer Flexible rock anchors for cramped conditions in a mine - consists of cone shaped links on cable core

Also Published As

Publication number Publication date
EP0578713A1 (en) 1994-01-19
AU650126B2 (en) 1994-06-09
DE4112096C1 (en) 1992-11-26
ATE138448T1 (en) 1996-06-15
PL168768B1 (en) 1996-04-30
WO1992018752A1 (en) 1992-10-29
AU1540492A (en) 1992-11-17

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