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WO1998045576A1 - Dispositif et procede d'injection - Google Patents

Dispositif et procede d'injection Download PDF

Info

Publication number
WO1998045576A1
WO1998045576A1 PCT/SE1998/000664 SE9800664W WO9845576A1 WO 1998045576 A1 WO1998045576 A1 WO 1998045576A1 SE 9800664 W SE9800664 W SE 9800664W WO 9845576 A1 WO9845576 A1 WO 9845576A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing
injection
hole
rock bolt
bore hole
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.)
Ceased
Application number
PCT/SE1998/000664
Other languages
English (en)
Inventor
Ivan Seibert Andersson
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.)
Skanska Anlaggning AB
Original Assignee
Skanska Anlaggning AB
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 Skanska Anlaggning AB filed Critical Skanska Anlaggning AB
Priority to JP54270398A priority Critical patent/JP2001518998A/ja
Priority to CA002286025A priority patent/CA2286025A1/fr
Priority to AU70926/98A priority patent/AU722633B2/en
Priority to EP98917878A priority patent/EP1017926A1/fr
Priority to PL98336121A priority patent/PL336121A1/xx
Priority to EA199900919A priority patent/EA199900919A1/ru
Publication of WO1998045576A1 publication Critical patent/WO1998045576A1/fr
Priority to NO994885A priority patent/NO994885L/no
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E21D21/008—Anchoring or tensioning means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001—Improving soil or rock, e.g. by freezing; Injections

Definitions

  • the nozzle has a lip seal or an expandable sleeve of elastomeric material which is sealingly pressed against the surrounding bore hole wall on the one hand to secure the nozzle and, on the other hand, to permit injection without injected material escaping between the nozzle and the bore hole wall.
  • the seal or sleeve therefore permits high pressure to be maintained in the bore hole during the injection procedure .
  • This prior-art device functions well when it is merely a matter of sealing cracks in the rock.
  • rock bolts be fixed to the rock wall.
  • a further bore hole is in such a case bored just adjacent to the bore hole which was used to seal cracks in the rock.
  • Unfortunately it happens quite often that water leaks through the new bore hole and that a renewed injection therefore is required. This problem is particu- larly pronounced if the water pressure in the rock round the tunnel or rock chamber is high and the rock has many large or small cracks.
  • the injection procedure must in such cases be repeated until sufficient tightness has been obtained for the bore hole, in which the rock bolt is to be inserted, to be dry.
  • the rock bolt can be anchored either by being designed as an expansion bolt (e.g. according to US-A- 4,290,515) or by first injecting cement mortar into the bore hole and then pressing in the rock bolt.
  • the latter procedure is complicated since the rock bolt in many cases can have a considerable length, usually 3-4 m if the rock is of poor quality with many cracks.
  • An injection device is used to inject at high pressure a sealing compound into the bore hole.
  • the insertion of the sealing compound is ensured on the one hand by the rotation of the cable and, on the other hand, by excess air in the bore hole being emitted through said ventilation ducts.
  • the cable can be used for anchoring purposes, for instance, in connection with the casting of a continuous concrete layer on the inside of the rock.
  • this prior-art technique can be used for the anchoring of cables, but it is not suited for the anchoring of rock bolts. Moreover, it is difficult to achieve sufficient tightness between the sealing ring and the adjoining rock surface since, for natural reasons, the rock surface is rough.
  • An object of the present invention therefore is to provide a method of anchoring a rock bolt in a bore hole in a rock wall while simultaneously injecting a sealing compound.
  • One more object of the invention is to provide a method of sealing a rock while simultaneously anchoring rock bolts and sealing the rock formation by injecting a sealing compound.
  • a further object of the invention is to minimise the need for injection of a rock by simultaneous sealing of the rock formation and anchoring of the rock bolts.
  • the invention resides in the idea of simultaneously sealing cracks round bore holes and anchoring a rock bolt in the bore hole by injecting a sealing material through an injection nozzle.
  • the injection nozzle comprises a sealing sleeve with a through hole and a nonreturn valve device and is left in the bore hole after injection.
  • the rock bolt is inserted through the through hole of the valve nozzle and through the nonreturn valve device.
  • one sealing element of the nonreturn valve device is formed of the rock bolt and its other sealing element is formed of a sealing socket. This is pressed in a yieldable, sealing manner against the rock bolt.
  • the injection of the sealing material is carried out through a gap between the rock bolt and the sealing sleeve and through the non- return valve device during elastic deformation of the sealing socket.
  • Fig. 1 is a longitudinal section of an embodiment of an injection nozzle designed according to the invention
  • Fig. 2 shows this injection nozzle when used in a bore hole for simultaneous anchoring of a rock bolt and injection of an injection compound
  • Fig. 3 illustrates a further embodiment of an injection nozzle according to the present invention.
  • the embodiment of an inventive injection device shown in the drawing comprises an elongate sleeve 10 which is externally threaded at its one end and at its other end is rigidly connected to or integrated with an outwardly directed flange 11.
  • a sealing element 12 in the form of a piece of tube of an elastomeric material is slipped onto the sleeve 10. This sealing element has at each end a washer 13, which preferably is fixedly connected to the end surface of the sealing element.
  • a pressure transferring sleeve 15 is placed between the sleeve 10 and a nut 14 threaded onto this.
  • a sealing socket 16 is fixed by vulcanisation to the outwardly directed side of the flange 11 (to the left in Fig. 1) .
  • the socket is made of an elastomeric material and has a through hole 17 with at least one portion with a smaller diameter than the inner diameter of the sleeve 10.
  • the through hole 17 of the socket also tapers conically in the direction of the outlet end, two inwardly directed sealing ridges 18 being formed in the through hole. These sealing ridges need not be semi-cir- cular in cross-section but may also be designed as inwardly projecting sealing lips.
  • a hole 19 is first bored in the rock wall.
  • the bore hole can have the desired diameter, e.g. about 64 mm, and the desired depth, e.g. 3-4 m, which is common in this context.
  • the nozzle of the injection device is inserted into the bore hole, the nut 14 being screwed in such that the sleeve 12 is compressed in the longitudinal direction to bulge outwards and sealingly be pressed against the wall of the rock hole.
  • the tightening of the nut can be carried out in a prior-art manner, for instance, as shown in the above-mentioned US-A-4, 260, 295. If the bore hole has a diameter of 64 mm, a suitable outer diameter of the piece of tube 12 can be 57 mm.
  • a rock bolt 12 is inserted through the nozzle.
  • the diameter of the rock bolt 20 should be smaller than the inner diameter of the sleeve 10 in order to leave an annular gap 21 between the bolt and the sleeve.
  • the through hole 17 of the socket 16 has a minimum diame- ter which is smaller than the outer diameter of the rock bolt, such that the socket 16 will be expanded during the insertion of the rock bolt and will therefore be sealingly pressed against the rock bolt. If the socket 16 is made of a rubber material, the rock bolt can have a dia- meter of 22 mm, the narrowest section of the socket 16 suitably being 20 mm.
  • a suitable inner diameter of the sleeve 10 can be 32 mm, such that the annular gap 21 has a width of 5 mm.
  • a suitable sealing material 23 e.g. cement grout
  • the sealing material 23 fills the bore hole 19 round the rock bolt 20 and escapes in the usual manner through large and small cracks in the rock hole wall to seal the rock and prevent any flow of water out through the bore hole and the surrounding rock wall.
  • the injection equipment 22 is disconnected from the sleeve 10. Also the injection nozzle is therefore left in the bore hole, as is the case with the injection equipment according to US-A-4,260,295.
  • Fig. 3 shows another embodiment of an injection nozzle according to the present invention. The components corresponding to those in Figs 1 and 2 have been given the same reference numerals in this Figure.
  • the injection nozzle according to this embodiment has a threaded sleeve 10.
  • flange 25 which is screwed onto or fixed in some other way to the sleeve.
  • One end surface of the sealing element 12 abuts against or is preferably fixed by vulcanisation to this flange.
  • a further end flange 26 which is displaceable along the sleeve 10.
  • At least one lock washer 27 abuts against the outside of this end flange.
  • This lock washer or these lock washers are such as to engage the threads of the sleeve and allow displacement of the washer/ washers merely in one direction of the sleeve (in this case, to the left in respect of the drawing) .
  • the flanges 25, 26 have a bevelled portion 28, which faces the sealing element 12. This is designed correspondingly. The reason for the bevelling is that the sealing element is better held in place while it expands. With a suitable design of the angle of bevel, it is therefore possible to eliminate the need for fixing the sealing element by vulcanisation to the end flanges, even if fixing by vulcanisation is preferred.
  • a pressure-equalising duct 29 is available, which extends through the sealing socket 16 and the flange 27 to connect the space 30 between the outside of the sleeve 10 and the inside of the sealing element 12 to the portion of the bore hole 19 inside the injection nozzle.
  • liquid material in the injection material will be pressed through the connecting duct into this space 30.
  • the volume of the space increases when compressing the sealing element 12 by means of the flanges 25, 26. This results in the space 30 being filled with liquid material.
  • the liquid material is essentially non-compressible and will therefore improve the securing of the injection nozzle to the bore hole wall, thereby decreasing the risk of the nozzle being pressed outwards in the direction of the inlet opening of the bore hole.
  • the remaining components of the injection device according to Fig. 3 can be designed in the same manner as in the embodiment according to Figs 1 and 2.
  • the through opening 17 for the rock bolt 20 can have internal flanges or sealing ridges corresponding to the ridges 18 in Figs 1 and 2.
  • the sealing socket 16 is fixed by vulcanisation to the flange 11.
  • the socket 16 can be fixed by vulcanisation to the flange 25 in a corresponding manner, such that the flange 25 will be connected to the sleeve 10 when it is screwed onto the same.
  • the bevelled surfaces 28 of the flanges 25,26 counteract a possible tendency of the sealing element 12 to move, while being compressed longitudinally, radially outwards relative to the flanges 25, 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Piles And Underground Anchors (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Pour colmater les fissures autour d'un trou foré (19), alors qu'un boulon d'ancrage (20) est ancré dans le trou foré, on injecte un matériau de colmatage (23) au moyen d'une buse d'injection. Cette buse comprend un manchon étanche (10-14), pourvu d'un trou traversant et d'un dispositif de clapet antiretour, et elle est laissée dans le trou foré après l'injection. Le boulon (20) est introduit dans le trou traversant de la buse du clapet et dans le dispositif de clapet antiretour (16, 20). Selon l'invention, le boulon (20) constitue un premier élément d'étanchéité du dispositif de clapet antiretour et l'autre élément d'étanchéité est constitué d'une douille d'étanchéité (16). Cette dernière est comprimée en étanchéité contre le boulon. L'injection du matériau de colmatage (23) s'effectue à travers un espacement (21) entre le boulon (23) et le manchon étanche (10-14) et à travers le dispositif de clapet antiretour (16, 20), lors de la déformation élastique de la douille d'étanchéité (16).
PCT/SE1998/000664 1997-04-10 1998-04-09 Dispositif et procede d'injection Ceased WO1998045576A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP54270398A JP2001518998A (ja) 1997-04-10 1998-04-09 注入装置および注入方法
CA002286025A CA2286025A1 (fr) 1997-04-10 1998-04-09 Dispositif et procede d'injection
AU70926/98A AU722633B2 (en) 1997-04-10 1998-04-09 Injection device and injection method
EP98917878A EP1017926A1 (fr) 1997-04-10 1998-04-09 Dispositif et procede d'injection
PL98336121A PL336121A1 (en) 1997-04-10 1998-04-09 Injecting device and method of making injections
EA199900919A EA199900919A1 (ru) 1997-04-10 1998-04-09 Нагнетательное устройство и способ герметизации
NO994885A NO994885L (no) 1997-04-10 1999-10-07 Injeksjonsanordning og fremgangsmåte ved injisering

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9701325A SE509139C2 (sv) 1997-04-10 1997-04-10 Sätt att samtidigt täta sprickor runt borrhål och förankra en bergbult, samt bergbult
SE9701325-4 1997-04-10

Publications (1)

Publication Number Publication Date
WO1998045576A1 true WO1998045576A1 (fr) 1998-10-15

Family

ID=20406517

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/000664 Ceased WO1998045576A1 (fr) 1997-04-10 1998-04-09 Dispositif et procede d'injection

Country Status (10)

Country Link
EP (1) EP1017926A1 (fr)
JP (1) JP2001518998A (fr)
CN (1) CN1258335A (fr)
AU (1) AU722633B2 (fr)
CA (1) CA2286025A1 (fr)
EA (1) EA199900919A1 (fr)
NO (1) NO994885L (fr)
PL (1) PL336121A1 (fr)
SE (1) SE509139C2 (fr)
WO (1) WO1998045576A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006006928A1 (fr) * 2004-07-08 2006-01-19 Atlas Copco Craelius Ab Agencement permettant d'injecter et de fixer un element de renfort et d'ancrage dans une paroi rocheuse
US9470088B2 (en) 2012-12-10 2016-10-18 Suomen Metallityö Oy Rock anchor bolt
CN109611610A (zh) * 2019-01-14 2019-04-12 中铁工程装备集团有限公司 一种流体管路连续型顶管施工装置和施工方法
WO2022251098A1 (fr) * 2021-05-24 2022-12-01 Inflatable Packers International Llc Colonne montante dilatable exempte de coulis
SE2450405A1 (en) * 2023-04-20 2024-10-21 Suomen Metallityoe Oy Sealing means, rock anchor bolt and tool
FI20236226A1 (fi) * 2023-11-02 2025-01-14 Suomen Metallityoe Oy Tiivistysväline ja kallioankkuripultti

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9801476L (sv) * 1998-04-27 1999-05-25 Haakan Eriksson Anordning för armering och tätning av bergvägg
SE514084C2 (sv) * 1999-04-21 2000-12-18 Gurlita Maskin Ab Anordning och metod för armering och tätning av bergvägg innefattande en expander för förankring
CN112221857A (zh) * 2020-10-16 2021-01-15 广州赢帝工业设计有限公司 一种自动化点胶组装流水线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO162780B (no) * 1986-12-08 1989-11-06 Oersta Staalindustri Fjellbolt.
WO1994005900A1 (fr) * 1992-09-09 1994-03-17 Örsta Staalindustri As Boulon d'ancrage pour la roche
WO1997018367A1 (fr) * 1995-11-15 1997-05-22 Juha Haavisto Tampon et procede d'injection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO162780B (no) * 1986-12-08 1989-11-06 Oersta Staalindustri Fjellbolt.
WO1994005900A1 (fr) * 1992-09-09 1994-03-17 Örsta Staalindustri As Boulon d'ancrage pour la roche
WO1997018367A1 (fr) * 1995-11-15 1997-05-22 Juha Haavisto Tampon et procede d'injection

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006006928A1 (fr) * 2004-07-08 2006-01-19 Atlas Copco Craelius Ab Agencement permettant d'injecter et de fixer un element de renfort et d'ancrage dans une paroi rocheuse
US9470088B2 (en) 2012-12-10 2016-10-18 Suomen Metallityö Oy Rock anchor bolt
CN109611610A (zh) * 2019-01-14 2019-04-12 中铁工程装备集团有限公司 一种流体管路连续型顶管施工装置和施工方法
CN109611610B (zh) * 2019-01-14 2023-08-08 中铁工程装备集团有限公司 一种流体管路连续型顶管施工装置和施工方法
WO2022251098A1 (fr) * 2021-05-24 2022-12-01 Inflatable Packers International Llc Colonne montante dilatable exempte de coulis
SE2450405A1 (en) * 2023-04-20 2024-10-21 Suomen Metallityoe Oy Sealing means, rock anchor bolt and tool
FI131789B1 (fi) * 2023-04-20 2025-12-01 Pretec Finland Oy Ab Tiivistysväline, kallioankkuripultti ja työkalu
FI20236226A1 (fi) * 2023-11-02 2025-01-14 Suomen Metallityoe Oy Tiivistysväline ja kallioankkuripultti
FI131262B1 (fi) * 2023-11-02 2025-01-14 Suomen Metallityoe Oy Tiivistysväline ja kallioankkuripultti
WO2025093821A1 (fr) * 2023-11-02 2025-05-08 Suomen Metallityö Oy Moyen d'étanchéité et boulon d'ancrage de roche

Also Published As

Publication number Publication date
JP2001518998A (ja) 2001-10-16
CA2286025A1 (fr) 1998-10-15
SE9701325D0 (sv) 1997-04-10
NO994885D0 (no) 1999-10-07
SE9701325L (sv) 1998-10-11
AU7092698A (en) 1998-10-30
EP1017926A1 (fr) 2000-07-12
CN1258335A (zh) 2000-06-28
NO994885L (no) 1999-11-17
AU722633B2 (en) 2000-08-10
EA199900919A1 (ru) 2000-04-24
PL336121A1 (en) 2000-06-05
SE509139C2 (sv) 1998-12-07

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