EP0188174B1 - Anker zur Sicherung von Wänden in Hohlraumbauten - Google Patents

Anker zur Sicherung von Wänden in Hohlraumbauten Download PDF

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Publication number
EP0188174B1
EP0188174B1 EP85810585A EP85810585A EP0188174B1 EP 0188174 B1 EP0188174 B1 EP 0188174B1 EP 85810585 A EP85810585 A EP 85810585A EP 85810585 A EP85810585 A EP 85810585A EP 0188174 B1 EP0188174 B1 EP 0188174B1
Authority
EP
European Patent Office
Prior art keywords
anchor
thread
anchor bar
flanks
bar
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
Application number
EP85810585A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0188174A1 (de
Inventor
Erwin Isler
Hans Rudolf Wey
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.)
H Weidmann AG
Original Assignee
H Weidmann AG
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 H Weidmann AG filed Critical H Weidmann AG
Priority to AT85810585T priority Critical patent/ATE36035T1/de
Publication of EP0188174A1 publication Critical patent/EP0188174A1/de
Application granted granted Critical
Publication of EP0188174B1 publication Critical patent/EP0188174B1/de
Expired 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
    • 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
    • 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
    • E21D21/0006—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by the bolt 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
    • E21D21/0086—Bearing plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00—Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/90—Fastener or fastener element composed of plural different materials
    • Y10S411/901—Core and exterior of different materials
    • Y10S411/902—Metal core
    • Y10S411/903—Resinous exterior

Definitions

  • anchors are installed in boreholes.
  • tie rods are known on the one hand, the anchor rod of which is anchored at one end by means of an expansion element in the bottom of the borehole, and on the other hand carries a thread onto which a nut is screwed. The nut lies against a plate which supports the wall of the cavity (EP-A-94908).
  • adhesive anchors are known, the anchor rod of which is connected to the borehole wall practically over its entire length by means of a two-component adhesive.
  • a nut screwed onto the free end of the anchor rod essentially secures the wall of the cavity only from crumbling and thus has to transmit much smaller forces.
  • the adhesive is first packaged in plastic bags and inserted into the borehole.
  • the anchor rod has cutting edges at its front end, which cut the bags open when the rod is inserted into the borehole.
  • the two adhesive components are mixed and adhesive is distributed over the circumference and the length of the rod. After the adhesive has hardened, the nut can be tightened.
  • EP-A 94 908 against which claims 1 and 4 are delimited, it is known to manufacture the anchor rod from glass fiber reinforced plastic. In addition to its high strength and low weight, this has the advantage that the anchor rod does not corrode.
  • the main problem here is the transmission of force from the anchor rod to the nut.
  • a sleeve cast onto the anchor rod at the end of the rod is provided with a sawtooth-like thread whose flanks facing away from the free end of the anchor rod are considerably steeper than the flanks facing the free end.
  • the sleeve is secured on the anchor rod by sawtooth-like grooves formed in the rod with axial length decreasing towards the free rod end against axial displacement.
  • the invention has for its object to develop an anchor according to the preamble of claims 1 and 4 so that it is easy to manufacture, and that it is particularly suitable as an adhesive anchor. This object is achieved by the characterizing features of claims 1 and 4.
  • the anchor rod By making the load-bearing flanks of the sawtooth thread flat, the anchor rod is radially compressed when the nut is tightened. Experiments have shown that this significantly improves the transmission of force within the anchor rod and that a larger load can therefore be transmitted without shearing off the threads.
  • the thread can either be cut directly into the anchor rod or formed on a sleeve cast or glued onto the anchor rod. In the latter case, the radial compression also considerably improves the transmission of force between the sleeve and the anchor rod.
  • the anchor shown is designed as an adhesive anchor.
  • the anchor rod 1 consists of glass fiber reinforced plastic.
  • two fillets 51 are cut at an acute angle to the rod axis, as a result of which two cutting edges 53 are formed for cutting open the plastic bags containing the two-component adhesive. This design of the cut edges ensures that the empty plastic bags do not become wedged on one side between anchor rod 1 and the borehole wall.
  • a threaded sleeve 3 made of glass fiber reinforced plastic is placed on the anchor rod 1 in the embodiment according to FIGS. 1 and 3.
  • the thread 2 is sawtooth-shaped and has flanks 31 which are inclined flat against the end of the anchor rod 1 to be inserted into the borehole and steep flanks 33 which are directed towards the free end of the anchor rod.
  • This configuration of the thread 2 ensures that the threads of the sleeve 3 become tightened when one is tightened Wedge the pressure nut 5 between a threaded body 11 of the nut 5 and the anchor rod 1.
  • the threads are therefore pressed radially onto the anchor rod 1.
  • this radial pressing of the anchor rod 1 not only considerably improves the force transmission between the sleeve 3 and the anchor rod 1, but also the force transmission within the anchor rod 1.
  • the wall thickness 35 between the thread reason 34 and the inner wall 38 of the sleeve 3 is very small, that is substantially smaller than the wall thickness 37 between the thread comb 36 and the inner wall 38. This ensures that the sleeve 3 tears helically along the thread base 34 when the anchor rod 1 is greatly expanded. Since the individual threads of the sleeve 3 are wedged between the nut 5 and the anchor rod 1, the power transmission is retained and it is prevented that the anchor rod 1 can peel from the sleeve 3 from the borehole side.
  • the sleeve 3 can be glued or cast onto the anchor rod 1. If the flanks 31 have a very flat angle, a press fit may also be sufficient.
  • the sleeve 3 has axial longitudinal grooves or slots 30 so that it can be radially compressed unimpeded.
  • the thread 2 is cut directly into the anchor rod 1.
  • the force transmission within the anchor rod 1 is significantly improved by the flat flanks 31 of the thread 2 facing away from the free rod end. This is because the glass fibers embedded in a matrix of synthetic resin and running parallel to the rod axis result in a pronounced anisotropy in the strength values of the rod 1.
  • the shear strength parallel to the fibers is relatively low, but can be increased considerably by radial compression. Therefore, the breaking load at which the threads shear is considerably higher when the thread 2 is designed according to the invention than with a normal thread.
  • the pressure nut 5 is also made of glass fiber reinforced plastic and has a cylindrical threaded body 11, from which radial ribs 25 protrude. On the face side, the ribs 25 each end in a support flange segment 19 with a convex spherical outer surface 21. The segments 19 are separated from one another by radial slots 20. As a result of this design, the contact pressures on the outer surface 21 via the ribs 25 result in radial compression forces on the threaded body 11, which counteract the expansion forces of the sawtooth thread 2. The wall of the threaded body 11 is thus compressed in the radial direction, which causes an elastic extension of the threaded body 11 in the axial direction proportional to the load. By suitable dimensioning, this elastic extension of that of the anchor rod 1 can be adapted under load, so that all threads carry the same amount. An ideal power transmission from the pressure nut 5 to the anchor rod 1 is thus achieved.
  • the mother is closed on the outside by a cover 13.
  • An axial circumferential groove 15 extends at the edge of the cover 13.
  • the wall thickness of the nut is small between the bottom of the groove 15 and the bottom of the threaded bore 17, so that a predetermined breaking point 9 is formed here.
  • the predetermined breaking point 9 is dimensioned strong enough to transmit the torque required for mixing the two-component adhesive from the nut 5 to the anchor rod 1. After the adhesive has hardened, the predetermined breaking point 9 breaks when the nut 5 is turned further, so that the nut 5 can be tightened.
  • the nut 5 is supported against an anchor plate 7, which has a support flange 41 with a spherical support surface 47.
  • Radial and annular ribs 45, 43 are arranged on the support flange 41, which form a kind of crumple zone so that the support flange can be supported uniformly along its circumference on the wall of the cavity.
  • the spherical surfaces 21, 47 prevent bending of the anchor rod 1.
  • the limitation of the screwing-in torque by the cover 13 connected to the threaded body 11 via the predetermined breaking point 9 is generally applicable to adhesive anchors, irrespective of the thread shape and the material of the anchor rod 1. Since the maximum transferable torque is relatively exactly defined by this predetermined breaking point, this can be ensured that on the one hand the torque required to mix the adhesive can be safely applied, but on the other hand that after the adhesive has hardened the anchor rod is not overloaded when the nut is turned further.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Dowels (AREA)
  • Piles And Underground Anchors (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
EP85810585A 1985-01-17 1985-12-10 Anker zur Sicherung von Wänden in Hohlraumbauten Expired EP0188174B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85810585T ATE36035T1 (de) 1985-01-17 1985-12-10 Anker zur sicherung von waenden in hohlraumbauten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH24785 1985-01-17
CH247/85 1985-01-17

Publications (2)

Publication Number Publication Date
EP0188174A1 EP0188174A1 (de) 1986-07-23
EP0188174B1 true EP0188174B1 (de) 1988-07-27

Family

ID=4182651

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85810585A Expired EP0188174B1 (de) 1985-01-17 1985-12-10 Anker zur Sicherung von Wänden in Hohlraumbauten

Country Status (11)

Country Link
US (1) US4664573A (ja)
EP (1) EP0188174B1 (ja)
JP (1) JPS61165497A (ja)
AT (1) ATE36035T1 (ja)
AU (1) AU579703B2 (ja)
CA (1) CA1250162A (ja)
DE (1) DE3564005D1 (ja)
DK (1) DK21086A (ja)
ES (1) ES8702591A1 (ja)
NO (1) NO855287L (ja)
ZA (1) ZA86165B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902727A1 (de) * 1989-01-31 1990-08-02 Willich F Gmbh & Co Gfk-gebirgsklebeanker

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE36035T1 (de) * 1985-01-17 1988-08-15 Weidmann H Ag Anker zur sicherung von waenden in hohlraumbauten.
EP0255392B1 (en) * 1986-07-30 1991-05-22 Du Pont (Australia) Ltd.. Reinforcing method and means
NO900391L (no) * 1989-02-06 1990-08-07 Weidmann H Ag Fremgangsmaate, forankringselement og spennanordning til oppspenning av en stang.
EP0403940B1 (en) * 1989-06-14 1994-05-11 Applied Research Of Australia Pty. Ltd. High strength fibre reinforced polymeric fasteners having threads, for example a nut and bolt
CA2697711A1 (en) * 2009-03-26 2010-09-26 Jennmar Corporation Engagement head for tensioning assembly
DE102009039919A1 (de) 2009-09-03 2011-03-10 Hilti Aktiengesellschaft Befestigungselement und Verfahren zum Herstellen eines Befestigungselementes
CN101892855A (zh) * 2010-06-29 2010-11-24 武汉科技大学 一种金属矿用高承载力的玻璃钢锚杆
CN101892851B (zh) * 2010-06-29 2012-08-29 武汉科技大学 一种金属矿山锚杆支护方法
CN105443549B (zh) * 2015-11-24 2018-06-15 游奕华 锥形内螺纹与螺纹柱连接结构
CN105443546B (zh) * 2015-11-24 2018-06-19 游奕华 锥形螺纹螺栓体以及锥形螺纹螺母
CN105443543B (zh) * 2015-11-24 2018-04-27 游奕华 锥形螺纹连接副
CN105443542B (zh) * 2015-11-24 2018-06-15 游奕华 锥形外螺纹与螺纹孔连接结构

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189801261A (en) * 1898-01-17 1898-02-19 Hedley Livingstone Wadd Button An Improved Nail.
US731896A (en) * 1902-03-24 1903-06-23 Caesar Hass Nail, spike, &c.
FR1197548A (fr) * 1957-07-10 1959-12-01 Raccord pour barres en acier destinées à armer et à mettre le béton sous contrainte
FR1327230A (fr) * 1962-04-05 1963-05-17 Anciens Etablissements Goldenb Dispositif d'ancrage et appareil de serrage de ce dispositif
GB1051351A (ja) * 1962-09-17 1966-12-14 Goodyear Tire & Rubber
FR2159758A5 (ja) * 1971-11-10 1973-06-22 Lenoir & Mernier
DE2827314A1 (de) * 1978-06-22 1980-01-10 Bayer Ag Spannbarer erd- und felsanker
AT364921B (de) * 1979-03-05 1981-11-25 Edarco Europ Dev & Res Zuganker zur verankerung von bauteilen in einem grundkoerper
US4313697A (en) * 1979-09-17 1982-02-02 Rozanc Richard C Mine roof support plate bolt
US4295761A (en) * 1979-12-10 1981-10-20 Stratabolt Corporation Post tensionable grouted anchor assembly
US4347020A (en) * 1980-01-02 1982-08-31 Birmingham Bolt Company Mine roof bolt assembly
CH660423A5 (de) * 1982-05-12 1987-04-15 Diamond Sa Verfahren zum zentrieren und fixieren einer lichtleitfaser in einem lichtleiterendstueck, nach diesem verfahren hergestelltes lichtleiterendstueck, und vorrichtung zur durchfuehrung des verfahrens.
NO159678C (no) * 1982-05-14 1989-01-25 Weidmann H Ag Fjellsikringsanker.
US4488843A (en) * 1982-07-16 1984-12-18 Illinois Tool Works Inc. Reusable one piece drive fastener
ATE36035T1 (de) * 1985-01-17 1988-08-15 Weidmann H Ag Anker zur sicherung von waenden in hohlraumbauten.
AU578850B2 (en) * 1985-11-20 1988-11-03 Fosroc International Limited Rock bolt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3902727A1 (de) * 1989-01-31 1990-08-02 Willich F Gmbh & Co Gfk-gebirgsklebeanker

Also Published As

Publication number Publication date
CA1250162A (en) 1989-02-21
ATE36035T1 (de) 1988-08-15
JPS61165497A (ja) 1986-07-26
AU579703B2 (en) 1988-12-08
DK21086A (da) 1986-07-18
DK21086D0 (da) 1986-01-16
AU5243186A (en) 1986-07-24
NO855287L (no) 1986-07-18
DE3564005D1 (en) 1988-09-01
EP0188174A1 (de) 1986-07-23
ZA86165B (en) 1986-09-24
ES8702591A1 (es) 1987-01-01
US4664573A (en) 1987-05-12
ES550973A0 (es) 1987-01-01
JPH0520559B2 (ja) 1993-03-19

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