EP2080836B1 - Procédé destiné à la fixation de sections de sol et dispositif destiné à l'exécution du procédé - Google Patents

Procédé destiné à la fixation de sections de sol et dispositif destiné à l'exécution du procédé Download PDF

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Publication number
EP2080836B1
EP2080836B1 EP20090000653 EP09000653A EP2080836B1 EP 2080836 B1 EP2080836 B1 EP 2080836B1 EP 20090000653 EP20090000653 EP 20090000653 EP 09000653 A EP09000653 A EP 09000653A EP 2080836 B1 EP2080836 B1 EP 2080836B1
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EP
European Patent Office
Prior art keywords
injection
drill bit
injection pipe
soil
pipe
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Application number
EP20090000653
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German (de)
English (en)
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EP2080836A3 (fr
EP2080836A2 (fr
Inventor
Walter Münch
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.)
DMI Injektionstechnik GmbH
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DMI Injektionstechnik GmbH
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Publication of EP2080836A3 publication Critical patent/EP2080836A3/fr
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    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil

Definitions

  • the invention relates to a method for consolidating bottom sections, in particular for lifting injections, wherein starting from spaced bores in connection with the introduction of injection media, a lifting injection, soil consolidation, fracture injection or Pipe screen injection, thereby first bores introduced into the soil and then via a multi-injectable injection tube an injection medium is pressed.
  • injection pipes that can be injection-molded several times under the building must be drilled beforehand, eg when passing through buildings with a tunnel. It is extremely important to avoid subsidence that no soil is withdrawn when drilling in the multi-compressible sleeve pipes. After introducing the multi-compressible sleeve pipes, the soil is pre-tempered with a hardening injection medium. Thereafter, the injection tubes are rinsed. If settling occurs during or after the tunneling, it is pressed again through the cuff pipes in order to raise the buildings again.
  • a tunnel safety during propulsion can be produced by means of an injection tube screen, starting from the spaced bores in conjunction with a body formation taking place through an injection medium, creating a contiguous floor structure, initially introducing bores into the soil and subsequently by way of a multiple-compression process Injection tube an injection medium is pressed to form a body which overlaps with the body of the adjacent bore.
  • the method is also applicable to fracture and Sohlinjetationen. Bodeninjetechnischmaschinetechnische are necessary, inter alia, to the ground, z. B. to improve higher loads, seal the soil or fractures in the rock, buildings, such. B. in underrunning with tunneling to lift again, to raise existing structures or to secure by an underpinning, disturbed mountain areas with z.
  • to consolidate pipe screens to secure tunnel bores, or to construct excavation enclosures and excavation bottoms see, for example, Document DE-C1-101683.1 ,
  • the invention relates to an apparatus for carrying out the method according to the invention.
  • Such a method which is used for soils without pressurized water, is well known.
  • the drilling of the hole is done in the overlay drilling method by an external drill pipe and an inner drill pipe are drilled with a double turret to the desired depth.
  • the outer drill string includes a ring bit, while the inner drill string has a full drill bit that fits into the outer drill string.
  • the inner bit is rebuilt with the réellebohrgestCode after reaching the final depth, introduced a filling hose into the hole and this example, filled with a consisting of one of the cement suspension, acting as a jacket mixture binder. Due to the required large diameter drill, the soil can not be displaced, but must be carried away between the outer drill pipe and the inner drill pipe.
  • a preventer with flat slide (seal, non-return valve) is mounted in a wall (bored pile, slot or sheet pile wall), so that no ground can be discharged next to the outer drill pipe due to the impending external water pressure.
  • an external drill string and an inner drill string are drilled to the desired depth with a double turret.
  • the drill bit has a tapered sealing flange that is pulled into the conical shaped beginner tube of the outer drill string to avoid bottom pull during drilling. If the soil can no longer be displaced during drilling, the drill bit is pushed forward with the inner drill pipe to open the soil compacted in front of the drill bit, thus opening the annular gap between the drill bit of the inner drill pipe and the beginner pipe. The soil is then removed in the annular gap between the inner drill pipe and the outer drill pipe via an ejector bell or a relief valve on the preventer. However, this can not be controlled due to the external water pressure. If the drilling progress returns due to the soil removal, the drill bit is positioned again in the sealing cone of the beginner's tube.
  • the inner drill pipe is pulled out of the drill bit (lost drill bit), a multiply compressible injection pipe (sleeve pipe) installed in its place, and the subsequent installation of the outer drill pipe simultaneously realized the installation of the casing mixture, which is a sheath of the injection pipe and sealing causes the hole and ensures that the individual stages (cuffs) of the injection tube have no connection with each other.
  • the outer drill pipe thus serves at times as a protective tube for the injection pipe (sleeve tube).
  • the annular gap between, for example, the diaphragm wall and the injection pipe must be sealed.
  • the closure of the wellbore mouth with sealing mortar or an end seal and the actual, the soil consolidation serving introduction of the injection medium carried out using a packer / twin packer on the designed as a rubber cuffs valves of the injection tube.
  • a disadvantage of this procedure is that stones can jam between the sealing surfaces, so that the advanced drill bit can not be resumed sealingly on the beginner tube. In this case, then takes place again a constant, subsidence after pulling soil withdrawal. If the soil (mountains), for example, gaps or cavities, the drill bit from the KlinkverBank the mecanicbohrgestfites can solve and fall off. Then the outer drill pipe is completely open and as soon as the turret is unscrewed from the outer drill pipe at the borehole mouth, the soil is penetrated by the whole cross section of the drill pipe External drill pipe removed. The hole must then be pressed and abandoned to avoid major damage.
  • the annular gap between, for example, the diaphragm wall and the injection pipe must also be temporarily sealed before the final sealing of the drill hole to prevent soil removal. This is time-consuming and costly and not always successful, so that it often comes to bottom withdrawal and resulting subsidence. Ultimately, a correspondingly powerful and large drilling rig is needed for the large diameter drill.
  • the installation of the injection tube (sleeve tube) fully secured and made by ensuring the position assurance for the injection tube targeted introduction of the injection medium in the soil and drilling under tight spatial conditions (in the area of tunnel boring machines, in tubes and basements or similar) can be ensured.
  • the advantages of the invention are that it can be dispensed with the installation of a separate injection tube and a required protective tube for the injection tube, since that outer drill pipe includes the beginner tube, which is firmly connected to the drill bit and at the same time designed as an injection tube and after reaching the End depth when drilling in the ground as a lost drill and injection tube remains or can be dismantled. It can be used immediately, only the inner rod has to be dismantled. Due to the small diameter of the outer drill pipe, where a self-contained protection pipe for the injection pipe is not required, drilling can be carried out in the displacement process and soil removal and resulting settlement can be avoided.
  • a method which effectively eliminates soil deprivation and related settlements, manages with a low number of operations (2 instead of 5 steps) at low cost and short construction time, requires only a small, lower performing and cheaper drilling rig, and work under tight spatial conditions (eg in tunnels). In addition, lower construction site setup and storage costs can be realized.
  • the in the Fig. 1 and 2 shown device that is particularly advantageous when drilling against oppressive water use consists of individual to lengthen screwed together steel outer drill pipe 1, a coaxial with the outer drill pipe 1 provided inside linkage 2, wherein after Fig. 2 the first bottom-side outer drill pipe (beginner pipe) with a drill bit 3 by screwing or welding firmly connected and as a multi-compressible injection pipe (sleeve tube) 4 is executed.
  • This injection tube 4 is provided in its longitudinal extension by way of example with three spaced-apart recesses 5 and a plurality of radially extending therein in the injection tube 4 openings 6, over which sealingly each an elastic sleeve 7 is arranged.
  • the elastic sleeves 7 are embedded in the respective recess 5 on the injection tube 4 and outside partially covered by four fenders 8 so that advantageously formed by the fenders 8 around the elastic sleeves 7 diameter with the diameter of the injection pipe 4 / outer drill pipe 1 congruent is.
  • Fig. 3 are preferably in a recess 5 of the injection tube 4 four apertures 6 are arranged, which are opposite to each other in pairs and are positioned so that they are in the area under the elastic sleeve 7, which then not from the four, also pairwise opposite fenders 8 is covered.
  • the passages 6 act in conjunction with the associated elastic sleeve 7 as valves.
  • the extension pipe 1 'adjoining the outer drill pipe 1, which is designed as an injection pipe 4 can also be designed as valve-carrying injection pipes (not shown).
  • the drill bit 3 is injection tube side a bayonet closure 9 or a sleeve (not shown) for the coupling with the inner rod 2 and check valves 10 for the prevention of soil entry assigned.
  • Drilling into the ground is carried out with a drilling rig 11 ( Fig.1 ). Accordingly, the method for solidifying or pressing of soil sections elaborates such that when working against oppressive water 12 before drilling in the pre-potted wall 13 (bored pile, slot or sheet pile wall) a preventer 14 with flat slide (seal, non-return valve) is mounted ( Fig.
  • the drilling fluid to be flushed into the soil via the inner rod 2 in conjunction with the holes in the drill bit 3, so that no pressure on the elastic sleeves 7 of the injection tube 4 is applied.
  • the shell mixture 16 directly when drilling or after reaching the Endinbohrianae on the inner rod 2 and the drill bit 3 in the annular gap of the bore, which is formed by the cutout of the drill bit 3, bring.
  • the jacket mixture 16 can be pressed by means of pressurization on the cooperating with the elastic sleeve 7 openings 6 in the annular gap of the bore, which is formed by the cutout of the drill bit 3.
  • Preventer 14 and flat slide are removed and made the end seal 17 of the bore ( Fig. 6 ).
  • the compression of the binder used as injection medium 18, gels or resin solutions in the individual stages by means of a according Fig. 7 introduced into the injection tube 4
  • Packers 19, in particular a double packer Due to the sealing positioning of the double packer 19 on both sides of the respective elastic sleeve 7 and its taking place under pressure feeding of the injection medium 18 into the injection tube 4 this passes through the openings 6 and the then contrasting elastic sleeve 7 in the bottom 15 or the joints, in which it is thus pressed or a targeted uplift injection can be carried out.
  • Synthetic resins, cements, ultrafine cements, waterglasses or gels are used as injection media.
  • the sleeve 7 applies again to the injection tube 4 and seals the openings 6 from the outside. After the first compression, the injection tube 4 can then be cleaned and later re-pressed.

Claims (12)

  1. Procédé destiné au compactage de sections de sol, notamment pour réaliser des injections de sols où, en injectant un coulis adapté selon un réseau de trous de forages qui, eux, sont disposés à une distance déterminée l'un de l'autre, est effectué soit une injection de compensation et donc une compaction du sol, soit une injection de traitement de fissures ou une injection par tubes à manchettes. Avant les travaux d'injection, des forages sont percés dans le sol puis un coulis y est injecté par un tube à injection qui, lui, peut être utilisé à plusieurs reprises, ce procédé étant
    caractérisé en ce
    qu'une tige de forage extérieure (1) en acier est conçue en tant que tube à injection (4) qui, lui, peut être utilisé à plusieurs reprises et dont le fond est muni d'une couronne de forage (3), est directement perforé dans le sol (15), et qu'un coulis de gaine (16) est mis en place soit directement lors du forage, soit après avoir atteint la profondeur de forage prévue, par la tige intérieure (2) et la couronne de forage (3), après quoi la tige intérieure (2) est retirée afin de réaliser l'injection du coulis (18) dans les différents niveaux, ces derniers étant dotés de joints élastiques qui sont disposés le long du tube d'injection, où cette injection est assurée par un obturateur (packer) (19) monté dans le tube d'injection (4), et où le tube d'injection (4) soit laissé avec la couronne de forage (3) dans le sol (15) en tant que tube de forage et d'injection (4) perdu, soit démonté après la procédure d'injection.
  2. Procédé destiné au compactage de sections de sol suivant la revendication 1,
    caractérisé en ce
    que le forage est effectué par interpénétration.
  3. Procédé destiné au compactage de sections de sol suivant la revendication 1,
    caractérisé en ce
    que durant l'opération de forage, les boues de forage sont conduites par la tige intérieure (2) vers la couronne de forage (3).
  4. Procédé destiné au compactage de sections de sol suivant la revendication 1,
    caractérisé en ce
    que le coulis de gaine (16) est mis en place soit directement lors du forage, soit après avoir atteint la profondeur de forage prévue, par la tige intérieure (2) et la couronne de forage (3) dans la fente annulaire du trou de forage qui, elle, est produite par l'outil de découpage non guidé de la couronne de forage (3).
  5. Procédé destiné au compactage de sections de sol suivant la revendication 1,
    caractérisé en ce
    que le coulis de gaine (16) est mis en place par pressurisation et à travers les perforations (6) interagissant avec le joint élastique (7) dans la fente annulaire du trou de forage qui, elle, est produit par l'outil de découpage non guidé de la couronne de forage (3).
  6. Dispositif destiné au compactage de sections de sol, composé de plusieurs tiges de forage extérieures qui peuvent être rallongées par vissage, d'une tige intérieure qui est disposée en sens coaxial par rapport à la tige de forage extérieure, d'une couronne de forage et d'un tube d'injection qui peut être utilisé à plusieurs reprises, ce dernier étant doté dans son extension longitudinale de plusieurs perforations qui, elles, sont disposées à une distance déterminée l'une de l'autre et en sens radial, et où est prévu un joint d'étanchéité élastique au-dessus de chaque perforation, ce dispositif étant
    caractérisé en ce
    que la tige de forage extérieure (1) est joint avec la couronne de forage (3), que la propre tige de forage extérieure (1) y est conçue en tant que tube d'injection (4) en acier qui peut être utilisé à plusieurs reprises et que celle-ci présente, dans des évidements (5) situés sur la tige de forage extérieure (1), les joints élastiques (7) qui, eux, sont partiellement revêtus sur son côté extérieur par des tôles de protection (8).
  7. Dispositif destiné à l'exécution du procédé suivant la revendication 6,
    caractérisé en ce
    que le diamètre formé par les tôles de protection (8) et les joints élastiques (7) coïncide avec le diamètre de la tige de forage extérieure (1).
  8. Dispositif destiné à l'exécution du procédé suivant la revendication 6,
    caractérisé en ce
    que l'évidement (5) du tube d'injection (4) présente quatre perforations (6) disposées face à face et par paires.
  9. Dispositif destiné à l'exécution du procédé suivant la revendication 6,
    caractérisé en ce
    que l'évidement (5) du tube d'injection (4) est revêtu de quatre tôles de protection (8) disposées face à face et par paires.
  10. Dispositif destiné à l'exécution du procédé suivant les revendications 8 et 9,
    caractérisé en ce
    que les perforations (6) sont positionnées de telle sorte qu'elles se trouvent au-dessous du joint élastique (7) et donc dans une zone qui n'est pas revêtue par les tôles de protection (8).
  11. Dispositif destiné à l'exécution du procédé suivant la revendication 6,
    caractérisé en ce
    que la couronne de forage (3) est munie d'une fermeture à baïonnette (9) ou d'un manchon assurant le raccordement avec la tige intérieure (2).
  12. Dispositif destiné à l'exécution du procédé suivant la revendication 6,
    caractérisé en ce
    qu'au moins le tube d'allonge (1') monté sur la première tige de forage extérieure (1) est également conçu en tant que tube d'injection (4) qui, en plus, peut être équipé d'un clapet.
EP20090000653 2008-01-21 2009-01-19 Procédé destiné à la fixation de sections de sol et dispositif destiné à l'exécution du procédé Active EP2080836B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200810005452 DE102008005452B4 (de) 2008-01-21 2008-01-21 Verfahren zum Verfestigen von Bodenabschnitten und Vorrichtung zur Durchführung des Verfahrens

Publications (3)

Publication Number Publication Date
EP2080836A2 EP2080836A2 (fr) 2009-07-22
EP2080836A3 EP2080836A3 (fr) 2012-07-11
EP2080836B1 true EP2080836B1 (fr) 2013-08-28

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EP (1) EP2080836B1 (fr)
DE (1) DE102008005452B4 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010033519A1 (de) * 2010-08-05 2012-02-09 Hypersond Gmbh Verfahren zur Einbringung einer Erdwärmesonde in ein Bohrloch und eine nach dem Verfahren arbeitende Vorrichtung
DE102013008621B4 (de) * 2013-05-21 2016-08-04 Bauer Spezialtiefbau Gmbh Vorrichtung und Verfahren zur überwachten Herstellung eines Hochdruckinjektionskörper
WO2017013773A1 (fr) * 2015-07-22 2017-01-26 Ｋｙｂ株式会社 Unité à barres omnibus, moteur électrique rotatif la comprenant et procédé de fabrication d'unité à barres omnibus
DE202017101325U1 (de) 2017-03-08 2017-03-24 Hans Böck Gmbh & Co. Vorrichtung zum Verankern eines vertikalen Bauteils in einem Bohrloch
CN107096793A (zh) * 2017-06-21 2017-08-29 南京贻润环境科技有限公司 一种用于原位修复土壤及地下水污染的高压注射钻杆装置
CN107816041B (zh) * 2017-10-24 2023-02-07 建研地基基础工程有限责任公司 一种不排土成孔预应力锚杆、锚孔防漏结构及其施工方法
IT201800007020A1 (it) * 2018-07-09 2020-01-09 Sistema e procedimento per l'iniezione di resine espandenti in terreni da consolidare.
CN111321735A (zh) * 2020-03-06 2020-06-23 中南林业科技大学 一种机械式压力分散型可回收锚杆装置
CN113668503B (zh) * 2021-08-30 2023-09-01 西藏天顺路桥工程有限公司 一种公路桥梁施工用注浆装置及注浆方法
CN115419291B (zh) * 2022-09-02 2024-02-06 中铁十一局集团有限公司 一种二次结构植筋装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2290616A1 (fr) * 1974-11-07 1976-06-04 Soletanche Dispositif obturateur, notamment pour tubes d'injection
DE3718631A1 (de) * 1987-06-03 1988-12-22 Gkn Keller Gmbh Kombiniertes injektionsverfahren sowie vorrichtung zur herstellung eines hochverfestigten bodenvolumens bei gleichzeitiger stabilisierung des angrenzenden bodens
DE9004177U1 (fr) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen, De
DE10148683C1 (de) * 2001-10-02 2002-10-24 Schmidt & Co Gmbh Kranz Injektionsbohrsanker

Also Published As

Publication number Publication date
DE102008005452B4 (de) 2009-12-31
EP2080836A3 (fr) 2012-07-11
DE102008005452A1 (de) 2009-07-30
EP2080836A2 (fr) 2009-07-22

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