EP1240398B9 - Garniture d'etancheite et procede pour introduire des milieux d'injection dans des fentes ou des cavites se trouvant dans du beton - Google Patents

Garniture d'etancheite et procede pour introduire des milieux d'injection dans des fentes ou des cavites se trouvant dans du beton Download PDF

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Publication number
EP1240398B9
EP1240398B9 EP00991609A EP00991609A EP1240398B9 EP 1240398 B9 EP1240398 B9 EP 1240398B9 EP 00991609 A EP00991609 A EP 00991609A EP 00991609 A EP00991609 A EP 00991609A EP 1240398 B9 EP1240398 B9 EP 1240398B9
Authority
EP
European Patent Office
Prior art keywords
bore
concrete
screw
packer
threaded section
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
EP00991609A
Other languages
German (de)
English (en)
Other versions
EP1240398A1 (fr
EP1240398B1 (fr
Inventor
Ulrich Hettich
Stefan Hettich
Stefan Nagel
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.)
Ludwig Hettich and Co
Original Assignee
Ludwig Hettich and Co
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Filing date
Publication date
Application filed by Ludwig Hettich and Co filed Critical Ludwig Hettich and Co
Publication of EP1240398A1 publication Critical patent/EP1240398A1/fr
Publication of EP1240398B1 publication Critical patent/EP1240398B1/fr
Application granted granted Critical
Publication of EP1240398B9 publication Critical patent/EP1240398B9/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection

Definitions

  • the invention relates to a packer and a method for introducing injection media into cracks or cavities in concrete, stone or similar building materials having the features of the preambles of claims 1 and 7, respectively.
  • Pakker are used at the interface component / supply line for the injection medium, which serve to connect the supply lines with the cracks or voids in the concrete components to be rehabilitated.
  • FIG. 1 shows an axial section.
  • a tube 1 has a smooth portion 2 and a threaded portion 3.
  • a package of three metal discs 4 and two interposed sealing bushes 5 is pushed out of rubber.
  • the smooth portion 2 is crimped with its free end to the circumferential inner edge of the lowermost disc 4 to a collar 6 which holds the package of the discs 4 and sealing bushes 5 against displacement in an axial direction.
  • the package 4, 5 held by a metal sleeve 7, which is pushed onto the tube 1 and by means of a screwed onto the threaded portion 3 nut 8 against the package 4, 5 is clamped.
  • a nipple 10 is screwed by means of a nut 9 for injecting an injection medium.
  • the packer 1 to 10 is used in the configuration shown in not yet strained sealing bushes 5 in a bore 12 in a concrete component 11. Then the nut 8 is tightened on the threaded portion 3, so that the sealing bushes 5 are pressed against the wall of the bore 12 with a pressing force sufficient to the packer 1 to 10 in hold the bore 12 due to the generated wall friction against the compressive force which is exerted on the injection medium in the direction axially outward on the packer, so as to avoid squeezing the packer out of the bore 12 during operation.
  • the holding force for the packer is achieved exclusively by frictional forces generated between the sealing bushes 5 and the bore wall 12 in the described manner.
  • the currently used injection pressures are on the order of up to 300 bar.
  • the holding forces in the bore caused solely by friction depend inter alia on the size of the friction coefficient between the bore wall and the material of the sealing bushes. They can vary in operation. At the mentioned high injection pressures can not always be ruled out that the packer is blown out of the hole, which is a security risk for the staff and also can cause damage to the environment and the packer itself.
  • Such a packer is known from DE 94 14 703 U1.
  • This packer is intended for a sunken downhole arrangement.
  • the upper portion of the borehole is widened, so that the packer with its nipple and serving for bracing hex nut can be introduced sunk.
  • provided under the hex nut retaining plate is located on a shoulder between the expanded and the narrowed borehole area.
  • the invention has the object of providing a packer and a method for introducing injection media under pressure in cracks or cavities in concrete, stone or similar materials in such a way that it is securely anchored in the well, with a good, reliable seal between the packer and the borehole should be ensured when introducing injection media.
  • the pipe part is secured by positive anchoring in the wellbore.
  • the compression of the sealing bush in the borehole therefore only needs to produce a sufficient sealing effect to be measured. Therefore, the packer and in particular the sealing bush in the invention can be made considerably more compact and the bore in the concrete component can be made smaller.
  • the screw formed as a hollow screw is formed in its threaded portion as well as a known concrete screw to a direct, i. ensure anchorless screwing in concrete.
  • a screw which can be screwed directly into concrete is protected in the European patent EP 0 623 759 of the applicant.
  • the packer according to the invention has a concrete screw 20 with a head 21 and a direct cutting in concrete threaded portion 22 and a smooth-walled guide sleeve 23 of smaller diameter.
  • the trained as a hexagon head 21 includes a threaded hole, in which a nipple 25 is screwed with threaded pin 24.
  • the threaded hole is located at the outer end of a through hole 26 through the concrete screw 20. This through hole 26 is also continued through the guide sleeve 23 through to the injection end at 27.
  • the guide sleeve 23 is in the embodiment shown a separate from the concrete screw 20 part which is pressed into the lower end of the through hole 26 of the concrete screw 20. Between the end 28 of the concrete screw 20 and a flanged collar 29 of the guide sleeve 23, a package of two metal discs 30 and a sealing bushing 31 is held from rubber-elastic material which is slightly biased by the depression of the guide sleeve 23 into the through hole 26 in the concrete screw 20.
  • the pre-assembled packer is screwed to prepare an injection in a previously introduced into the concrete component bore 32 at a crack or suspected cavity suspicion, and indeed so deep until the collar 29 of the guide sleeve 23 starts at a shoulder 33 of the bore 32. Since the guide sleeve 23 slides in the through hole 26 of the concrete screw under the force exerted by the concrete screw when screwing axial force, the package of the two discs 30 and the sealing bushing 31 is slightly compressed in the last phase of the screwing, so that under slight shortening of the length of this Package the sealing bush is pressed to generate a sufficient seal on the bore wall.
  • the holding force between the packer and the component is thus different from the prior art (Fig. 1) not by the frictional force between the sealing bushing 31 and bore 32nd but by the positive cooperation of the external thread of the threaded portion 22 of the concrete screw 20 with the internal thread produced thereby applied in the wall of the bore 32.
  • the packer of the invention has fewer parts and may be smaller in size than the prior art packer shown in Figure 1, resulting overall in a significantly shorter and more compact design as well as a smaller diameter borehole. Nevertheless, the packer can due to the positive connection with the wellbore form-fitting much higher holding forces, ie with increased security many times. transfer.
  • a packer according to the invention can be mounted easily in the manner described and dismantled by unscrewing and reuse several times. It is not a problem if, when unscrewing the concrete screw 20 from the borehole 32, the guide sleeve 23 together with the sealing bush remains in the bore. For reuse is then merely a new guide sleeve 23 with deferred package of sealing bushing 31 and 30 washers press into the through hole 26 of the concrete screw 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Piles And Underground Anchors (AREA)
  • Road Signs Or Road Markings (AREA)
  • Sealing Material Composition (AREA)

Claims (7)

  1. Garniture d'étanchéité pour introduire des milieux d'injection sous pression dans des fentes ou des cavités se trouvant dans du béton, de la pierre ou des matériaux de construction analogues à travers une pièce tubulaire, qui comporte une vis (20) avec une partie filetée (22), qui est appliquée dans un perçage (32) dans le béton à l'endroit de la fente ou de la cavité et qui est obturée par au moins un joint d'étanchéité déformable (31), qui est pressé contre la paroi du perçage, dans laquelle
    - la vis (20) y compris la partie filetée (22) est traversée par un passage foré (26) pour le milieu d'injection,
    - la partie filetée (22) est pourvue d'un filet taillant directement dans le béton, et
    - le joint d'étanchéité (31) est disposé entre la partie filetée (22) et un épaulement (33) dans le perçage et est pressé contre cet épaulement (33) par la partie filetée (22).
  2. Garniture d'étanchéité selon la revendication 1, caractérisée en ce que la vis creuse (20) est.pourvue à sa tête (21) d'un raccord (25) pour le milieu d'injection.
  3. Garniture d'étanchéité selon l'une ou l'autre des revendications 1 ou 2, caractérisée en ce que la vis (20) présente, à l'extrémité d'injection, une partie de guidage lisse (23) pour le centrage et le guidage du joint d'étanchéité formé par un manchon d'étanchéité (31).
  4. Garniture d'étanchéité selon la revendication 3, caractérisée en ce que la partie de guidage est formée par un manchon de guidage séparé (23), à enfoncer dans un passage foré (26) de la vis (20).
  5. Garniture d'étanchéité selon la revendication 4, caractérisé en ce que le manchon d'étanchéité (31) peut être pressé entre la vis et une collerette rabattue (29) du manchon de guidage (23) pour produire une pression d'étanchéité désirée contre la paroi du trou foré.
  6. Garniture d'étanchéité selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le perçage (32) présente plusieurs gradins.
  7. Procédé pour introduire des milieux d'injection sous pression dans des fentes ou des cavités se trouvant dans du béton, de la pierre ou des matériaux de construction analogues, à travers une vis (20) avec une partie filetée (22), qui est appliquée dans un perçage (32) réalisé avec au moins un épaulement (33) et de ce fait étagé dans le béton à l'endroit de la cavité ou de la fente et qui est obturé par au moins un joint d'étanchéité déformable (31) dans le perçage, qui est pressé contre la paroi du perçage, dans lequel
    - la vis (20) traversée par un passage foré (26) pour le milieu d'injection est préparée avec une partie filetée (22), qui est vissée directement dans le béton, et
    - le joint d'étanchéité (31) est pressé contre l'épaulement (33) par vissage de la vis (20) dans le perçage (32) afin de produire une pression d'étanchéité désirée par rapport à la paroi du perçage.
EP00991609A 1999-12-20 2000-12-18 Garniture d'etancheite et procede pour introduire des milieux d'injection dans des fentes ou des cavites se trouvant dans du beton Expired - Lifetime EP1240398B9 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19961553 1999-12-20
DE19961553A DE19961553C1 (de) 1999-12-20 1999-12-20 Packer und Verfahren zum Einbringen von Injektionsmedien in Risse oder Hohlräume in Beton
PCT/EP2000/012914 WO2001046539A1 (fr) 1999-12-20 2000-12-18 Garniture d'etancheite et procede pour introduire des milieux d'injection dans des fentes ou des cavites se trouvant dans du beton

Publications (3)

Publication Number Publication Date
EP1240398A1 EP1240398A1 (fr) 2002-09-18
EP1240398B1 EP1240398B1 (fr) 2005-09-07
EP1240398B9 true EP1240398B9 (fr) 2006-10-11

Family

ID=7933477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00991609A Expired - Lifetime EP1240398B9 (fr) 1999-12-20 2000-12-18 Garniture d'etancheite et procede pour introduire des milieux d'injection dans des fentes ou des cavites se trouvant dans du beton

Country Status (5)

Country Link
EP (1) EP1240398B9 (fr)
AT (1) ATE304101T1 (fr)
AU (1) AU3364301A (fr)
DE (2) DE19961553C1 (fr)
WO (1) WO2001046539A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006018857A1 (de) * 2006-04-24 2007-11-08 Köster Bauchemie AG Packer und Vorrichtung zum Setzen desselben und Einbringen von Injektionsmaterial unter Druck in einen Riß, eine Fehlstelle und dergleichen in einem Bauteil oder einem Bauwerk sowie geschlitzte Spreizhülse für selbigen
JP6213070B2 (ja) * 2013-08-30 2017-10-18 株式会社大林組 給水方法
JP6341904B2 (ja) * 2015-12-28 2018-06-13 東海旅客鉄道株式会社 コンクリート母材補修工法、注入用ユニット
CN116086533A (zh) * 2023-01-10 2023-05-09 广州大学 自修复功能的混凝土结构健康监测系统及方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR953996A (fr) * 1947-09-18 1949-12-16 Perfectionnements apporté aux procédés d'obturation des fissures pouvant se produire dans les ouvrages en maçonnerie
AU563462B2 (en) * 1983-03-29 1987-07-09 Foundation Technology (Aust.) Pty. Ltd. Epoxy resin injection system for crack repair
DE8816578U1 (fr) * 1988-12-07 1989-12-07 Rausch Bautenschutz, 6414 Hilders, De
DE3902925A1 (de) * 1989-02-01 1990-08-02 Fischer Artur Werke Gmbh Injektionspacker zum injizieren von mineralischem bindemittel in bauteilen
EP0623759B1 (fr) * 1993-05-04 1995-03-01 LUDWIG HETTICH SCHRAUBENFABRIK GmbH & Co. Vis autotaraudeuse
DE9414703U1 (de) * 1994-06-07 1995-07-13 Olson Marek Injektionsdübel
DE29819813U1 (de) * 1998-11-05 2000-03-09 Hettich & Co Gewindeschneidende Schraube

Also Published As

Publication number Publication date
DE19961553C1 (de) 2001-06-13
WO2001046539A1 (fr) 2001-06-28
ATE304101T1 (de) 2005-09-15
EP1240398A1 (fr) 2002-09-18
AU3364301A (en) 2001-07-03
EP1240398B1 (fr) 2005-09-07
DE50011133D1 (de) 2005-10-13

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