EP0006703A1 - Boulon d'ancrage, procédé de réalisation d'un boulon d'ancrage et enveloppe protectrice contre la corrosion utilisable dans ce procédé - Google Patents

Boulon d'ancrage, procédé de réalisation d'un boulon d'ancrage et enveloppe protectrice contre la corrosion utilisable dans ce procédé Download PDF

Info

Publication number
EP0006703A1
EP0006703A1 EP79301094A EP79301094A EP0006703A1 EP 0006703 A1 EP0006703 A1 EP 0006703A1 EP 79301094 A EP79301094 A EP 79301094A EP 79301094 A EP79301094 A EP 79301094A EP 0006703 A1 EP0006703 A1 EP 0006703A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
anchor
cap
self
layers
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.)
Granted
Application number
EP79301094A
Other languages
German (de)
English (en)
Other versions
EP0006703B1 (fr
Inventor
John Vincent Brown
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.)
Fosroc International Ltd
Original Assignee
Fosroc International Ltd
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=10498010&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0006703(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Fosroc International Ltd filed Critical Fosroc International Ltd
Priority to AT79301094T priority Critical patent/ATE1554T1/de
Publication of EP0006703A1 publication Critical patent/EP0006703A1/fr
Application granted granted Critical
Publication of EP0006703B1 publication Critical patent/EP0006703B1/fr
Expired legal-status Critical Current

Links

Images

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
    • 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
    • E21D21/0013—Protection against corrosion

Definitions

  • This invention concerns ground anchors for use in the civil engineering, construction and mining industries for example,
  • ground anchors there is a requirement for ground anchors to have at least a double corrosion protection about the central anchor element, such as that provided by a waterproof sleeve which is grouted on to the element.
  • Such anchors are known, but the sleeves are applied to the anchor element in a factory and each anchor must be purpose-built. This makes it expensive to manufacture and transport a small number of anchors for a specific application, and there is often a long delay before the anchors can be delivered to the site of use. There is therefore a need for a simple and cheap way of corrosion proofing an anchor element on site to specific requirements, and this invention fulfills that need.
  • the cap is secured to the anchor element by means of the self-setting composition to seal the end of the anchor against ingress of moisture and to protect the leading end of the anchor during insertion into a borehole.
  • the sleeve lengths will usually be connected together such that the sleeve is sealed against escape of self-setting composition during introduction of the composition into the sleeve.
  • the sleeved anchor element is upwardly inclined away from the cap for best escape of air whilst the self-setting composition is supplied into the sleeve.
  • the inlet is preferably located in the side of the cap.
  • the anchor When the anchor is upwardly inclined for introduction of self-setting composition, the inlet is less liable to damage in this location, and the inlet is less likely to become blocked by dirt.
  • the sleeve preferably has at least two corrosion-proof layers. It is especially preferred for the sleeve to comprise three layers, the intermediate layer being of set filler such as a resinous or a cementitious grout and at least one of the other two layers being of mlastics. Most preferably the sleeve comprises an outer layer of plastics, an intermediate layer of set filler and an inner layer of metal. The metal inner layer serves to strengthen the sleeve for handling purposes.
  • the anchor element may be a bar such as Macalloy or Dividag bar having either a plain or a ribbed profile.
  • Plain bars may be used with threaded nuts and plain washers, the nuts being screw-threaded on to a co-operatively threaded end portion of the bar.
  • Ribbed bars do not require the use of a nut and washer, but rely instead upon the ribs to transfer load from the tendon to the sleeve.
  • the method is particularly useful for corrosion proofing strand tendons.
  • Known factory methods require "noding" of each strand to transfer the stress from the strands to the sleeve. This noding involves removal of a polypropylene coating from the length of the tendon to be corrosion proofed, followed by untwisting of the strands and thorough cleaning off of any grease from the strands. A node is then applied to each strand whereupon the strands are re-twisted and secured inside the sleeve. The nodes serve to lock the strands to the sleeve.
  • the plastics sheathing is stripped off the tendon and the tendon surface is wiped free of grease without untwisting the strands.
  • a metal ferrule is then compressed onto the end of the tendon for best transfer of tendon load to the sleeve.
  • the sleeve is then secured to the end portion of the tendon by the method of the invention.
  • the sleeve should have longitudinally spaced apart external circumferential ribs and should be internally threaded to respectively provide a good key between the sleeve and the grout used to secure the element in the hole,and between the sleeve and the self-setting composition which is used to secure the sleeve to the anchor element.
  • the invention includes a ground anchor made by the method, and further includes the sleeve lengths themselves as new items of commerce.
  • the sleeve 1 of Figure 1 comprises an outer tube 2 of plastics, the tube having spaced-apart castellations 3, an inner steel tube 4 having a thread 5, and an intermediate layer of set polyester resin 6. Both ends of the sleeve 1, only one end being shown for convenience in Figure 1, have two diametrically opposite recesses 7. Towards each end of the sleeve, an 0-ring 8 is located about the tube between the castellations 3.
  • a ribbed steel bar 9, Figure 2 to be corrosion proofed for use as a ground anchor, is mounted on a trestle, not shown, at a construction site.
  • a suitable number of sleeve lengths 1 are fitted over one end of the rod 9 in end-to-end relation. For convenience only two sleeve lengths are shown in Figure 2.
  • a connecting tube 10 is fitted over the adjacent C-rings 8 of adjacent sleeve lengths.
  • An end cap 11 comprising a mouth portion 12 and a side inlet 13, is fitted over the end of the sleeve. The clearance between the mouth 12 of the end cap 11 and the sleeve 1 is sealed by the adjacent 0-ring 8.
  • a polyester resin grout 14 is then pumped through the inlet 13 of the cap 11 into the annular clearance 15 between the sleeve and the rod.
  • the anchor is upwardly inclined away from the end cap for best escape of air during introduction of the grout.
  • the grout is forced into the clearance between adjacent ends of the sleeve lengths there to provide a moisture-proof seal.
  • the recesses 7 facilitate passage of the grout between the sleeve ends and also act as keys more firmly to secure the sleeve lengths together by means of the grout within the recesses.
  • the inlet 13 is sawn off and the anchor located in a hole in a substrate in known manner.
  • the cap 11 serves as a guide for the anchor and protects the leading end of the anchor during insertion into a hole.
  • the grout within the end cap 11 seals the end of the anchor against penetration of moisture.
  • a strand tendon may be used in place of the rod 9.
  • the tendon is prepared by removing the protective sheath along the length of the tendon to be corrosion proofed. The bared tendon is then thoroughly degreased and a ferrule is compressed on to the end of the tendon. The tendon is then sleeved as described, the ferrule being located within the cap 11.
  • Figure 3 shows an alternative way of joining together adjacent sleeve lengths.
  • the external plastics layer 2 of one sleeve length la has a female extension 16, and the same layer of the adjacent sleeve length 1b has a male extension 17.
  • the extensions 16, 17 are screw-threaded one into the other.
  • the method of the invention allows corrosion-proof anchors to be made quickly and cheaply on site to meet individual requirements.
  • the sleeve is capable of transferring the maximum load of the anchor element to the borehole grout, provided a sufficient length of sleeve is used.
  • the minimum length of sleeve for full load transfer ranges from 4 m for a 110 mm external diameter sleeve, to 1.5 m for a 65 mm external diameter sleeve.

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)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Gloves (AREA)
  • Rock Bolts (AREA)
EP79301094A 1978-06-17 1979-06-08 Boulon d'ancrage, procédé de réalisation d'un boulon d'ancrage et enveloppe protectrice contre la corrosion utilisable dans ce procédé Expired EP0006703B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79301094T ATE1554T1 (de) 1978-06-17 1979-06-08 Felsanker, verfahren zur herstellung des felsankers und ein in diesem verfahren verwendbares korrosionsgeschuetztes rohr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2719078 1978-06-17
GB7827190 1978-06-17

Publications (2)

Publication Number Publication Date
EP0006703A1 true EP0006703A1 (fr) 1980-01-09
EP0006703B1 EP0006703B1 (fr) 1982-09-15

Family

ID=10498010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301094A Expired EP0006703B1 (fr) 1978-06-17 1979-06-08 Boulon d'ancrage, procédé de réalisation d'un boulon d'ancrage et enveloppe protectrice contre la corrosion utilisable dans ce procédé

Country Status (7)

Country Link
EP (1) EP0006703B1 (fr)
JP (1) JPS557393A (fr)
AT (1) ATE1554T1 (fr)
BR (1) BR7903733A (fr)
DE (1) DE2963669D1 (fr)
ES (1) ES481592A1 (fr)
ZA (1) ZA792992B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1002282A5 (fr) * 1987-02-19 1990-11-20 Bau Box Ewiag Barre de traction ou de compression pour relier deux elements de construction.
WO2012162472A1 (fr) 2011-05-26 2012-11-29 Syngenta Participations Ag Granulés de lutte biologique, stabilisés, pouvant être dispersés dans l'eau
CN106351220A (zh) * 2016-11-02 2017-01-25 洛阳中岩工程材料有限公司 一种高效率的大直径锚杆连接套
GB2566253A (en) * 2017-07-28 2019-03-13 Shire Structures Ltd Improved foundation pin
WO2024008807A1 (fr) 2022-07-08 2024-01-11 Bayer Aktiengesellschaft Formulation solide de mélanges insecticides ayant des propriétés de dispersion particulièrement bonnes

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400113A (en) * 1980-06-13 1983-08-23 Ingersol-Rand Company Friction rock stabilizer and a method of isolating the same from a bore surface
JPS58150622A (ja) * 1982-03-01 1983-09-07 Katsumoto Ueda 腐蝕防護アンカ−幹体の注入材の注入方法
JPS60110381A (ja) * 1983-11-20 1985-06-15 Sumitomo Electric Ind Ltd プレストレスアンカーの構造体
JPS63130821A (ja) * 1986-11-20 1988-06-03 Taisei Corp アンカ−ケ−ブルの構造
JPH0211839U (fr) * 1988-07-06 1990-01-25
CN103758549B (zh) * 2014-01-09 2016-09-28 中国矿业大学 一种基于膏体材料的先灌后锚预应力全长锚固支护方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641772A (en) * 1970-06-04 1972-02-15 Losinger Ag Rock anchor
DE2039109A1 (de) * 1970-08-06 1972-02-17 Dyckerhoff & Widmann Ag Verfahren zum Herstellen eines vorgespannten Erdankers
CH521487A (de) * 1971-01-12 1972-04-15 Bauer Karlheinz Korrosionsgeschützter Zuganker zur Verankerung von Bauteilen im Erdreich sowie Verfahren zur Herstellung des Zugankers
FR2138796A1 (fr) * 1971-05-20 1973-01-05 Celmac Ag
DE2557978A1 (de) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Anker zur verankerung von bauteilen im erdreich oder fels
DE2511863A1 (de) * 1975-03-18 1976-09-23 Dyckerhoff & Widmann Ag Zugglied fuer einen vorgespannten verpressanker
FR2335319A1 (fr) * 1975-12-19 1977-07-15 Intrafor Cofor Procede et dispositif d'injection d'un coulis dans une gaine de cable ou de tirant precontraint de grande longueur
FR2353682A1 (fr) * 1976-06-01 1977-12-30 Gebirgssicherung Gmbh Ancrage de la roche
DE2637676A1 (de) * 1976-08-20 1978-02-23 Stump Bohr Gmbh Zuganker
FR2381167A1 (fr) * 1977-02-19 1978-09-15 Dyckerhoff & Widmann Ag Barre de traction protegee contre la corrosion, pour ancrage dans des roches dures susceptible d'etre precontraint
FR2397492A1 (fr) * 1977-07-13 1979-02-09 Soletanche Dispositif d'ancrage dans le sol au moyen d'une armature ou tirant isolee du sol

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641772A (en) * 1970-06-04 1972-02-15 Losinger Ag Rock anchor
DE2039109A1 (de) * 1970-08-06 1972-02-17 Dyckerhoff & Widmann Ag Verfahren zum Herstellen eines vorgespannten Erdankers
CH521487A (de) * 1971-01-12 1972-04-15 Bauer Karlheinz Korrosionsgeschützter Zuganker zur Verankerung von Bauteilen im Erdreich sowie Verfahren zur Herstellung des Zugankers
FR2138796A1 (fr) * 1971-05-20 1973-01-05 Celmac Ag
DE2557978A1 (de) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Anker zur verankerung von bauteilen im erdreich oder fels
DE2511863A1 (de) * 1975-03-18 1976-09-23 Dyckerhoff & Widmann Ag Zugglied fuer einen vorgespannten verpressanker
FR2335319A1 (fr) * 1975-12-19 1977-07-15 Intrafor Cofor Procede et dispositif d'injection d'un coulis dans une gaine de cable ou de tirant precontraint de grande longueur
FR2353682A1 (fr) * 1976-06-01 1977-12-30 Gebirgssicherung Gmbh Ancrage de la roche
DE2637676A1 (de) * 1976-08-20 1978-02-23 Stump Bohr Gmbh Zuganker
FR2381167A1 (fr) * 1977-02-19 1978-09-15 Dyckerhoff & Widmann Ag Barre de traction protegee contre la corrosion, pour ancrage dans des roches dures susceptible d'etre precontraint
FR2397492A1 (fr) * 1977-07-13 1979-02-09 Soletanche Dispositif d'ancrage dans le sol au moyen d'une armature ou tirant isolee du sol

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1002282A5 (fr) * 1987-02-19 1990-11-20 Bau Box Ewiag Barre de traction ou de compression pour relier deux elements de construction.
WO2012162472A1 (fr) 2011-05-26 2012-11-29 Syngenta Participations Ag Granulés de lutte biologique, stabilisés, pouvant être dispersés dans l'eau
CN106351220A (zh) * 2016-11-02 2017-01-25 洛阳中岩工程材料有限公司 一种高效率的大直径锚杆连接套
GB2566253A (en) * 2017-07-28 2019-03-13 Shire Structures Ltd Improved foundation pin
WO2024008807A1 (fr) 2022-07-08 2024-01-11 Bayer Aktiengesellschaft Formulation solide de mélanges insecticides ayant des propriétés de dispersion particulièrement bonnes

Also Published As

Publication number Publication date
EP0006703B1 (fr) 1982-09-15
ES481592A1 (es) 1980-02-16
DE2963669D1 (en) 1982-11-04
ZA792992B (en) 1980-06-25
JPS557393A (en) 1980-01-19
ATE1554T1 (de) 1982-09-15
BR7903733A (pt) 1980-04-15

Similar Documents

Publication Publication Date Title
US4302131A (en) Anchor elements
EP0006703A1 (fr) Boulon d'ancrage, procédé de réalisation d'un boulon d'ancrage et enveloppe protectrice contre la corrosion utilisable dans ce procédé
US4360292A (en) Grouted strand anchor and method of making same
CA2747756C (fr) Boulon conique deformable et son procede de fabrication
EP0960266B1 (fr) Boulon serre-cable
US5079879A (en) Anti-corrosive post-tensioning anchorage system
EP0060863B1 (fr) Procede et assemblage tendon de renforcement isole electriquement
US4179861A (en) Method of anchoring a borehole anchor
US5738466A (en) Ribbed flexible member for casting into an anchorage medium
KR100930347B1 (ko) 일체식 분산압축형 앵커 및 이를 이용한 가압그라우팅앵커링 공법
CA1129689A (fr) Dispositif d'ancrage dans le sol
JPH0771034A (ja) 地盤アンカー構造
JPH0324665Y2 (fr)
EP0979899B1 (fr) Elément de support protégé contre la corrosion pour une ancre de sol ou de roche, pieu comprimé ou similaire
DE1759561B2 (de) Verfahren zum herstellen von verpressankern und vorrichtung zum durchfuehren des verfahrens
US3328223A (en) Method of constructing a dielectric ladder
JPH0452318A (ja) 永久地盤アンカーの防食処理構造
WO2014071442A1 (fr) Boulon d'ancrage
CA1055067A (fr) Manchon d'accouplement pour tuyaux
EP0188890A1 (fr) Tirant d'ancrage dans le sol
JP6779551B1 (ja) 圧着グリップ及びそれを用いたショートアンカー
KR200428833Y1 (ko) 영구형 앵커
US4427718A (en) Wedge encapsulation method
CA1243512A (fr) Tube d'ancrage pour terrain rocheux et methode de positionnement connexe
KR100776733B1 (ko) 영구형 앵커

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

17P Request for examination filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19820915

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19820915

Ref country code: BE

Effective date: 19820915

REF Corresponds to:

Ref document number: 1554

Country of ref document: AT

Date of ref document: 19820915

Kind code of ref document: T

REF Corresponds to:

Ref document number: 2963669

Country of ref document: DE

Date of ref document: 19821104

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19830608

Ref country code: AT

Effective date: 19830608

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19830630

26 Opposition filed

Opponent name: DYCKERHOFF & WIDMANN AG

Effective date: 19830610

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19840229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19840301

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19860512

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL