EP1272711B1 - Procede et dispositif pour produire des cavites a contre-depouille - Google Patents

Procede et dispositif pour produire des cavites a contre-depouille Download PDF

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Publication number
EP1272711B1
EP1272711B1 EP01933596A EP01933596A EP1272711B1 EP 1272711 B1 EP1272711 B1 EP 1272711B1 EP 01933596 A EP01933596 A EP 01933596A EP 01933596 A EP01933596 A EP 01933596A EP 1272711 B1 EP1272711 B1 EP 1272711B1
Authority
EP
European Patent Office
Prior art keywords
shaft
hole
excavating
elements
substrate
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
EP01933596A
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German (de)
English (en)
Other versions
EP1272711A1 (fr
Inventor
Jens Kardel
Jens Meissner
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.)
Stump Spezialtiefbau GmbH
Original Assignee
Stump Spezialtiefbau GmbH
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Application filed by Stump Spezialtiefbau GmbH filed Critical Stump Spezialtiefbau GmbH
Publication of EP1272711A1 publication Critical patent/EP1272711A1/fr
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Publication of EP1272711B1 publication Critical patent/EP1272711B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/02—Retaining or protecting walls
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0233—Retaining or protecting walls comprising retention means in the backfill the retention means being anchors

Definitions

  • the invention relates to a method for producing an undercut Cavity, especially for the production of support members, the undercut cavity preferably for receiving an attached therein Load distribution element acts. Furthermore, the invention relates to a Device for producing such an undercut cavity.
  • an anchor hole is flushed out of the hole in the ground.
  • a rebar needle anchor
  • the rebar for example, a ribbed reinforcing steel.
  • the rebar will be held in the center of the anchor hole by means of a spacer and protrudes into the hole in the retaining wall to be attached.
  • reaching obliquely down into the load distribution cavity Filling hole introduced cement material, which the anchor hole, the Load distribution cavity and completely fills the hole in the retaining wall.
  • this invention has the object Basically, a method of making an undercut cavity, especially to create an earth anchor that is simple creating a cavity with certain dimensions (within allowable Tolerances), and in which a softening of the cavity surrounding soil is avoided. Furthermore, the invention is the Task based on a device for producing such to create an undercut cavity.
  • an undercut cavity special device which comprises a rotatable shaft which in a predetermined area at least one radially movable removal element having.
  • the removal element is designed so that it rotates when the shaft rotates moved radially outwards by the centrifugal forces acting on the removal element or corresponding radial to the surrounding substrate, the material of the Exerts underground or loosening forces.
  • Removal element under a radial mobility of the Removal element is to be understood as any configuration of the removal element, which ensures that the removal element when the shaft rotates as a result of the Centrifugal forces endeavor to enlarge its radial dimensions.
  • the removal element can consist of a rigid element, which is pivotally arranged on the shaft, the pivot axis in Is arranged substantially perpendicular to the longitudinal axis. With a rotation of the In such an embodiment, the shaft is pivoted, wherein the substantially rigid removal element each with its radially outer Area loosens or removes the material of the surface.
  • the removal element is as a flexible element, preferably designed as a steel cable. Because of the flexibility is achieved that the rotatable shaft together with the removal elements in one Borehole can be inserted. Of course, the diameter must be used the shaft in the area of the removal elements may be smaller than the inside diameter of the borehole or recesses must be provided in the shaft in which the removal elements are included in the idle state.
  • two flexible elements are through a single element is formed which is provided in a crosswise through the shaft Bore is held. This results in a simplified production of the Contraption.
  • areas or elements can be made on each removal element a resistant material.
  • This can be act as ring-shaped elements made of a resistant material, for example around diamond-set rings, such as those used as chain links in stone saws Find use.
  • the removal elements as such can be formed by steel cables, the one have sufficient flexibility.
  • the steel cables can be dimensioned in such a way be attached to the shaft that already by inserting the device into the The steel cables are pressed against the borehole wall and consequently the steel cables are placed under a bending pretension. This results in relatively high speeds even at low shaft speeds material-removing forces acting on the borehole in the area of Removal elements surrounding the surface can be exercised.
  • the shaft there are several removal elements on the shaft, in particular flexible ones Elements of different lengths are provided.
  • This will improve erosion effect with an increase in the diameter of the resulting undercut cavity achieved because the ablative effect, especially at flexible removal elements, is greatest when the removal elements are in one substantially stretched or nearly stretched perpendicular to the position Longitudinal axis of the rotating shaft.
  • the undercut cavity ensures a high ablative effect.
  • the shaft has an axially extending feed channel for feeding the flushing medium provided which has one or more outlet openings in the areas of Attachment of the removal elements.
  • the device preferably has one at the front end of the shaft Guide area whose outer diameter is essentially the same Corresponds to the inner diameter of the borehole. This also results in a Centering the shaft in the borehole if the diameter of the shaft is otherwise Area is smaller than the diameter of the borehole. The resulting annulus between the rear of the shaft and the borehole wall can then for rinsing the removed or loosened material of the subsurface serve.
  • an undercut cavity is created generated by the device, i.e. the shaft with the arranged on it Removal elements are introduced into a hole, the undercut Cavity by a rotation of the shaft and thereby by means of the Removal elements generated radial ablative or loosening forces becomes.
  • the removed or loosened material is removed using a flushing medium rinsed out.
  • one axial expansion can be either over a corresponding axial range several removal elements can be provided for the shaft, or the shaft is during of rotating (or even at a standstill with a subsequent renewed Rotate) moved by a predetermined amount in the axial direction.
  • the shaft can be moved oscillating in the axial direction.
  • Air is particularly suitable as a flushing medium, since this causes a wetting of the subsurface surrounding the cavity or the borehole is avoided.
  • Flushing medium is a hardening building material, for example cement milk or the like. used. This also results in no unnecessary wetting of the the borehole or the undercut surrounding subsurface and in addition, the higher viscosity of such a flushing medium makes it high Discharge effect achieved. A complete discharge of the loosened or removed material is at least not necessary if that Material in connection with the hardening building material for the production of a sufficiently strong anchor body is suitable. The use of other liquid Detergent is also possible.
  • FIG. 1 shows schematically a section through a Retaining wall 1 and an underlying soil 3, which together, in general spoken, represent an underground 5.
  • a borehole 7 was made, in which in FIG. 1 shown phase of producing an undercut cavity Device 9 for producing an undercut cavity is introduced.
  • the device 9 is explained in more detail below with reference to FIG. 4:
  • the Device 9 comprises a shaft 11 which has a head in its front area or guide region 13, whose outer diameter essentially corresponds to the inner diameter of the borehole 7. This results in a Centering of the device 9 in the borehole 7, although the rear area of the Shaft 11 has a smaller outer diameter than the guide area 13th
  • two removal elements 17 are through a single element is formed, which is perpendicular to each hole extends to the longitudinal axis of the shaft 11 and is held therein. This results in a simplified manufacture of the device 9.
  • the removal elements 17 in FIG. 4 are designed as flexible removal elements, so that the device 9 due to the compared to the inner diameter of the Borehole 7 of smaller diameter of the rear region of the shaft 11 can be easily inserted into the borehole.
  • FIG. 1 This phase is shown in Fig. 1.
  • the device 9 is in two phases of the insertion process into the borehole 7: Left of the longitudinal axis of the Device 9 is shown the phase in which the device 9 is in one position is located, in which the removal elements 17 are still completely outside of the borehole 7 lie.
  • the removal elements 17 are shown stretched, whereby the removal elements in practice, of course, not in this phase must extend completely radially outwards, but as a result of Own weight can be bent accordingly.
  • Halfway to the right of the The axis of symmetry of the device 9 is drawn in a position in which the Removal elements 17 by the insertion movement in the borehole 7 in the direction of the rear end of the device 9 has been bent.
  • the removal elements 17 have a certain prestress, so that at least the outer areas of the removal elements 17 on the inner wall of the Apply borehole 7.
  • the device 9 is, as indicated in FIG. 2 by the arrow I, in Rotation offset, so that the removal elements are sufficient due to the centrifugal force high forces on the subsurface in the vicinity of work area 15 exercise to loosen or remove the material of the subsurface. With increasing diameter of the undercut cavity 19 come Removal elements 17 more and more in an extended position.
  • each of those ablation elements 17 a develop optimal removal effect, which is in a substantially stretched State (in the radial direction).
  • a undercut cavity 19 with a predetermined axial extent Device 9 are preferably moved oscillating in the axial direction.
  • the removed or loosened material of the surrounding subsurface is by means of a flushing medium 21 from the annular space between the shaft 11 and the inner wall of the borehole 7 rinsed out.
  • an axially extending feed channel 23 for the Flushing medium 21 is provided, with several in the work area 15 Outlet openings 25 are provided.
  • the outlet openings 25 in the wall 27 of the Hollow shaft 11 formed so that the longitudinal axis of the outlet openings 25 in Towards the end of the shaft 11 an acute angle with the longitudinal axis A. the shaft 11 or the device 9 includes. This results in a improved flushing effect in the direction of the opening 29 of the borehole 7 in the Retaining wall 1.
  • the flushing medium can be compressed air or water (at relatively low pressure) or around a hardenable building material, e.g. Cement milk, act.
  • a hardenable building material e.g. Cement milk
  • the device 9, 3 again from the borehole 7 or the undercut Cavity 19 pulled out. Bend due to the flexibility of the removal elements 17 this when pulling the device 9 out of the borehole 7 in the direction to the front end of the device 9.
  • the flexible removal elements can e.g. as. Steel cables should be formed.
  • the Steel cables can each have one or more elements 31 made of resistant Have material to an improved ablative or loosening effect to reach. In addition, this can improve the wear resistance of the Removal elements can be achieved.
  • elements 31 made of resistant Material can be ring-shaped elements attached to a steel cable trained removal element 17 are pressed. For example, here diamond-set links of a stone saw chain can be used.
  • the removal elements 17 can be constructed from individual chain links, each or only certain of the chain links made of a resistant material improved removal effect exist.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Soil Working Implements (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Ropes Or Cables (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Earth Drilling (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (10)

  1. Procédé pour réaliser une cavité à contre- dépouille, notamment pour la fabrication d'un organe de support,
    a) dans lequel un trou (7) s'étendant sensiblement en ligne droite est réalisé dans un substrat (5),
    b) dans lequel un dispositif (9) avec un arbre rotatif (11) est introduit dans le trou (7), sur lequel au moins un élément abrasif (17) mobile radialement est disposé dans une zone de travail prédéterminée (15), et
    c) dans lequel le dispositif (9) est amené en rotation, et par suite des forces centrifuges le au moins un élément d'abrasion (17) provoque une érosion ou une désagrégation du matériau du substrat (5) dans la zone entourant le dispositif (9) dans la zone de travail (15) de l'élément flexible (17), et
    d) dans lequel l'arbre (11) comporte à son extrémité avant une zone de guidage (13), dont le diamètre extérieur correspond sensiblement au diamètre intérieur du trou (7) dans le substrat (5), et dans lequel le diamètre extérieur de l'arbre (11) est inférieur au diamètre intérieur du trou (7), de sorte que les éléments abrasifs (17) peuvent être reçus dans l'espace annulaire qui en résulte entre l'arbre (11) et la paroi intérieure du trou, et
    e) dans lequel, pendant l'abrasion et la désagrégation ou après l'abrasion ou la désagrégation du substrat (5), le matériau abrasé ou désagrégé est expulsé au moyen d'un agent de rinçage (21), en vue de la formation d'une cavité (19) en contre- dépouille par l'intermédiaire de l'espace annulaire.
  2. Procédé selon la revendication 1, dans lequel le dispositif (9) pour la réalisation d'une cavité en contre- dépouille (19) est déplacé sur une étendue axiale prédéterminée, de préférence pendant la rotation de l'arbre, sur une distance prédéterminée dans la direction axiale.
  3. Procédé selon la revendication 2, dans lequel le dispositif (9) est déplacé en oscillant dans la direction axiale.
  4. Procédé selon l'une des revendications précédentes, dans lequel comme agent de rinçage (21) on utilise de l'air ou un matériau de construction se durcissant, par exemple de la barbotine.
  5. Procédé selon l'une des revendications précédentes, dans lequel l'agent de rinçage (21) est amené par l'arbre (11) au dispositif (9), et sort par des ouvertures de sortie (25) dans la zone de travail du au moins un élément abrasif (17).
  6. Dispositif pour la réalisation d'une cavité en contre- dépouille dans un trou dans un substrat, en particulier pour la fabrication d'un tirant d'ancrage, selon le procédé conforme aux revendications 1 à 6,
    a) comprenant un arbre rotatif (11) qui, dans une zone de travail (25) prédéterminée, comporte au moins un élément d'abrasion (17) mobile radialement, lequel est agencé de façon que, par suite des forces centrifuges agissant lors de la rotation, une abrasion ou une désagrégation du matériau du substrat (5) se produit dans la zone entourant l'arbre (11) dans la zone de travail de l'élément flexible (17), et
    b) présentant à l'extrémité avant de l'arbre (11) une zone de guidage (13) dont le diamètre extérieur correspond sensiblement au diamètre intérieur du trou (7) dans le substrat (5), et dans lequel le diamètre extérieur de l'arbre (11) est inférieur au diamètre intérieur du trou (7), de sorte que les éléments abrasifs (17) peuvent être reçus dans l'espace annulaire qui en résulte entre l'arbre (11) et la paroi intérieure du trou, et que le matériau brasé ou désagrégé peut être expulsé.
  7. Dispositif selon la revendication 6, dans lequel l'élément abrasif (17) est constitué comme un élément flexible, de préférence un câble d'acier.
  8. Dispositif selon la revendication 6 ou 7, dans lequel sur chaque élément abrasif (17) sont prévues des zones ou des éléments (31) en un matériau résistant.
  9. Dispositif selon la revendication 8, dans lequel les éléments abrasifs (17) sont constitués par des câbles d'acier qui comportent un ou plusieurs éléments annuaires (31) en un matériau résistant, de préférence sous la forme d'anneaux garnis de diamants.
  10. Dispositif selon l'une des revendications 6 à 9, dans lequel un canal d'amenée (23) s'étendant axialement dans l'arbre (11) est prévu pour l'amenée de l'agent de rinçage (21), lequel canal présente dans la zone de travail une ou plusieurs ouvertures de sortie (25).
EP01933596A 2000-04-11 2001-04-11 Procede et dispositif pour produire des cavites a contre-depouille Expired - Lifetime EP1272711B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10017894A DE10017894A1 (de) 2000-04-11 2000-04-11 Verfahren und Vorrichtung zur Herstellung von hinterschnittenen Hohlräumen, insbesondere zur Herstellung von Traggliedern und Nägeln
DE10017894 2000-04-11
PCT/DE2001/001422 WO2001077445A1 (fr) 2000-04-11 2001-04-11 Procede et dispositif pour produire des cavites a contre-depouille

Publications (2)

Publication Number Publication Date
EP1272711A1 EP1272711A1 (fr) 2003-01-08
EP1272711B1 true EP1272711B1 (fr) 2004-03-03

Family

ID=7638305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01933596A Expired - Lifetime EP1272711B1 (fr) 2000-04-11 2001-04-11 Procede et dispositif pour produire des cavites a contre-depouille

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Country Link
EP (1) EP1272711B1 (fr)
AT (1) ATE261026T1 (fr)
DE (2) DE10017894A1 (fr)
WO (1) WO2001077445A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111720059A (zh) * 2020-07-29 2020-09-29 河南理工大学 一种柔性扩孔装置及方法
CN111663903A (zh) * 2020-07-29 2020-09-15 河南理工大学 一种复合型扩孔钻头
CN111720058A (zh) * 2020-07-29 2020-09-29 河南理工大学 一种水动力扩孔装置及方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176772A (en) * 1963-03-29 1965-04-06 Macgregor Robert Roy Device for removing detrital material from a liner, tubing and casing
GB1249143A (en) * 1968-12-13 1971-10-06 Cementation Co Ltd Improvements in or relating to a reamer bit
GB1427528A (en) * 1972-11-20 1976-03-10 Reader Sons Ltd E Device for making under-reams for ground anchors
DD148247A1 (de) * 1979-12-08 1981-05-13 Willi Jahr Verfahren und vorrichtung zur hohlraumherstellung fuer einen fundamentkoerper
DE3716100A1 (de) 1987-05-14 1988-12-01 Ross Kurt G Verfahren zur sicherung von stuetzmauern
DE3728270A1 (de) * 1987-08-25 1989-06-01 Klemm Bohrtech Verfahren und vorrichtung zur herstellung von betonpfaehlen im boden
DE3743507A1 (de) * 1987-12-22 1989-07-06 Klemm Bohrtech Verfahren und vorrichtung zur herstellung von pfaehlen im erdreich
CH691128A5 (fr) * 1995-10-23 2001-04-30 Vincenzo Sibilla Procédé de mise en place de tirants d'ancrage.
DE19721361C2 (de) * 1997-05-22 2001-01-04 Zueblin Ag Verfahren zur Herstellung von Pfählen und solchermaßen hergestellte Pfähle
US6065551A (en) * 1998-04-17 2000-05-23 G & G Gas, Inc. Method and apparatus for rotary mining

Also Published As

Publication number Publication date
DE50101611D1 (de) 2004-04-08
DE10017894A1 (de) 2001-10-25
ATE261026T1 (de) 2004-03-15
EP1272711A1 (fr) 2003-01-08
WO2001077445B1 (fr) 2002-05-23
WO2001077445A1 (fr) 2001-10-18

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