EP0962595A1 - Appareil à améliorer le sol - Google Patents

Appareil à améliorer le sol Download PDF

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Publication number
EP0962595A1
EP0962595A1 EP99110723A EP99110723A EP0962595A1 EP 0962595 A1 EP0962595 A1 EP 0962595A1 EP 99110723 A EP99110723 A EP 99110723A EP 99110723 A EP99110723 A EP 99110723A EP 0962595 A1 EP0962595 A1 EP 0962595A1
Authority
EP
European Patent Office
Prior art keywords
rotation
mixing blades
axis
connecting elements
mixing
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.)
Withdrawn
Application number
EP99110723A
Other languages
German (de)
English (en)
Inventor
Werner Harthauser
Peter Banzhaf
Wolfgang 2nd Floor Topy Building Maier
Ulli 2nd Floor Topy Building Wiedenmann
Tim Schleebaum
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.)
Bauer Spezialtiefbau GmbH
Original Assignee
Bauer Spezialtiefbau GmbH
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 Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Publication of EP0962595A1 publication Critical patent/EP0962595A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
    • 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
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds

Definitions

  • the invention describes a device for improving the load capacity of cohesive, soft or loosely stored soils. With the help of the device standing soil stirred up and thereby a liquid, self-hardening binder in introduced the mixed soil and mixed with it.
  • DE 4219150 describes a mixing process with one or more continuous Snails with which a binder suspension introduced mixes with the soil becomes.
  • This device is suitable for non-cohesive soils and is deep in depth limited because the weight of the continuous snails is very large and as a result large and expensive carrier devices become necessary.
  • Japanese patent application sho-53-153257 shows a mixing device made of Due to weight only has continuous snails in the lower part and in the upper part In part, only stirring arms are arranged in the horizontal direction on the boring bars.
  • this device - similar to DE 4219150 To achieve homogenization of the soil with the binder.
  • This Technology essentially results in horizontally layered mixing bodies with strong fluctuating homogeneity.
  • EP 0441169A2 describes a mixing device similar to a continuous one Snail with the disadvantages that the homogenization is only unsatisfactory in cohesive soils can be done because the mixing blades are essentially horizontal in the soil Cut open the direction and mix only a little.
  • the improvement of the mixing effect the arrangement of numerous mixing nozzles leads to a complex and prone to failure Embodiment.
  • the device according to the invention has the task of special equipment of the Mixing blades with connecting elements a technically simple but very intensive Mix up cohesive, soft or loosely stored soils.
  • Another aim is to ensure that the soil present is mixed as homogeneously as possible a liquid, self-curing binder suspension or other liquids or suspensions can be achieved.
  • the device according to the invention achieves the object with the features of the first Claim.
  • mixing blades On an axis of rotation introduced essentially perpendicularly into the ground, which powered by a drill, there are mixing blades at different heights. These mixing blades are relatively slim, with low penetration resistance to ensure the mixing device according to the invention in the ground.
  • the diagonally arranged connecting elements between the mixing blades cause when mixing and homogenizing flows within the soil column, which each point up or down after the position of the connecting elements and the mixing intensify the soil.
  • mixing blades are arranged in groups on an axis of rotation 1.
  • One of these so-called groups of mixing blades preferably consists of two wings.
  • a group can also consist of one wing or more than one three wings.
  • groups 4, 6 and arranged further not shown are now several groups 4, 6 and arranged further not shown.
  • These other groups can also consist of one to consist of several wings, which expediently essentially one above the other or are only slightly offset.
  • mixing blades are connected to one another with connecting elements 5. It can it should be expedient to add the mixing blades to a group with connecting elements 5 connect. These connecting elements 5 can be axially parallel to the axis of rotation 1 be arranged or at angles ⁇ to the axis of rotation 1. The execution can be straight or be curved. In a further embodiment variant, mixing blades can also be used different groups such as B. Group 6 and Group 4 via fasteners 8 are connected. In this application, the fasteners 8 either carried out in a straight line or they preferably follow spatial Curves.
  • the connecting elements 5 and 8 are shown in the form of flat iron. These flat bars are preferably different in cross section Cutting angles to the intersected floor arranged, d. H. some cut surfaces are perpendicular to the imaginary swivel arm and some cut surfaces point an angle less than 90 ° to the imaginary swivel arm.
  • a further improvement in the mixing is achieved in that the distance the connecting elements 5, 8 to the axis of rotation 1 is selected differently. To this Be way even without vertical movement of the mixing device within the intersected Soil concentric cutting circles reached, which in turn a stronger Reduce the existing soil material.
  • the self-hardening binder is added via one or more nozzles 9, 10, which are preferably arranged distributed over the length of the axis of rotation 1.
  • nozzles 9, 10 which are preferably arranged distributed over the length of the axis of rotation 1.
  • the binder is expediently added once via addition openings 9 directly on the surface of the axis of rotation 1 and others via openings 10 which are at a greater distance from the lateral surface the axis of rotation 1.
  • angle of attack ⁇ of the mixing blades vary. These angles are in a preferred range between 0 and 60 °.
  • the angle ⁇ decisively determines the rate of penetration and the resistance to penetration the mixing device in the grown soil.
  • FIG 2 shows the lower part of an embodiment variant according to the invention, in which the lower mixing blades 2 are provided with drilling teeth 12. These drill teeth are used to increase the rate of penetration of the mixing device and the wear of the Reduce wings.
  • the drilling teeth are of greater importance especially when the soil column is out Soil and binder to a certain depth in a harder and more stable floor area must involve.
  • the connecting elements 5 from round bars, steel strands or steel cables.
  • the use of elastic Materials for the fasteners can help reduce wear and the mixing and cutting effect through additional lateral degrees of movement increase or improve.
  • the rods, strands or steel cables can also be loose or sagging connected to the mixing blades.
  • Figure 3 shows a horizontal section through the mixing device with the mixing blades of the individual groups, which in this embodiment at angles of 90 ° around the Axis of rotation 1 are arranged.
  • the mixing blades can be placed at angles ⁇ against the horizontal become. These angles are between 0 and 90 °.
  • the angle ⁇ determines the rate of penetration in the undisturbed ground and is also a measure of the required Torque forces on the axis of rotation 1, which are necessary for thorough mixing become.
  • the angle ⁇ that the mixing blades make to the drilling axis is in a range from 45 ° to 135 °, preferably at about 90 °.
  • the mixing blades can be made from a flat material, but also from a flat one Material that is curved in one or more directions, such as a section of the surface of a helix.
  • the material is preferably made of Steel.
  • the mixing blades are not distributed over the circumference of the axis of rotation 1 in any way fixed order. It is nevertheless advisable to arrange the mixing blades in a kind of group, these mixing blades of a group essentially arranged one above the other are. This can be expedient in particular for manufacturing reasons.
  • the Wings do not need to be congruent on top of each other.
  • the groups The arrangement of the mixing blades makes it easier to attach the connecting elements 5, 8 from the point of view that none too large on the axis of rotation 1 Imbalance forces act, which adversely affects the smooth running of the mixing device would have. This allows the symmetry to be approximately maintained in the arrangement of the mixing blades and fasteners may be beneficial.
  • the connecting elements 5, 8 are preferably made of round material, square material, Triangular material or flat steel material. Another version is also individual or steel strands arranged side by side, which consist of several individual wires. In this embodiment, wear is reduced because these strands are more compliant are and compared to smooth material, these partially twisted strands have a better Cutting ability.
  • Another embodiment variant is that the connecting elements 5, 8 Wire ropes exist which are only loosely attached between the mixing blades. Certain floors can make it necessary that the connecting elements 5, 8 with wear-reducing pads or are equipped with teeth.
  • the mixing of the soil with the device according to the invention is carried out so that during screwing the mixing device into the soil through one or more addition nozzles 9, 10 a self-curing binder is added.
  • a self-curing binder is added.
  • the binder is included Pressures between 5 and 500 bar introduced. While screwing in, mixing and Homogenizing it is useful to alternately change the directions of rotation or Moving device up and down alternately.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
EP99110723A 1998-06-05 1999-06-04 Appareil à améliorer le sol Withdrawn EP0962595A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998125169 DE19825169C2 (de) 1998-06-05 1998-06-05 Stabmixer
DE19825169 1998-06-05

Publications (1)

Publication Number Publication Date
EP0962595A1 true EP0962595A1 (fr) 1999-12-08

Family

ID=7870027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99110723A Withdrawn EP0962595A1 (fr) 1998-06-05 1999-06-04 Appareil à améliorer le sol

Country Status (2)

Country Link
EP (1) EP0962595A1 (fr)
DE (1) DE19825169C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015498C2 (nl) * 2000-06-22 2001-12-28 In Situ Technieken B V Snij- en/of menginrichting.
EP1457602A2 (fr) * 2003-02-27 2004-09-15 BAUER Maschinen GmbH Procedée de produire une structure de fondation
DE102004038896A1 (de) * 2004-08-11 2006-02-23 Keller Grundbau Gmbh Verfahren zur Fundamentsicherung sowie Bohr- und Mischwerkzeug

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10150278B4 (de) * 2001-10-12 2006-07-06 Tracto-Technik Gmbh Verfahren und Vorrichtung zum Bodenstabilisieren
DE10216952B4 (de) * 2002-03-26 2007-08-09 Harald Gollwitzer Gmbh Verfahren zum Herstellen eines Mix-Pfahles in einem Untergrund
DE10238082B3 (de) 2002-08-21 2004-02-12 Bauer Spezialtiefbau Gmbh Vorrichtung zur Herstellung von Bohrpfählen bei Verwendung von einer Verrohrung mit innenliegender, durchgehender Schnecke
DE10327470B3 (de) * 2003-06-18 2004-09-30 Bauer Spezialtiefbau Gmbh Vorrichtung zur Herstellung von Einzelschlitzen oder durchgehenden Wänden im Erdreich nach dem Mixed-in-Place-Verfahren
DE10338171B4 (de) * 2003-08-20 2007-10-25 Keller Grundbau Gmbh Verfahren zum Einbringen eines schlanken Bodenpfahls und nach diesem Verfahren hergestellter Bodenpfahl
DE102017104879A1 (de) 2017-03-08 2018-09-13 Hans Böck Gmbh & Co. Verfahren, Vorrichtung und Verwendung der Vorrichtung zum Verankern eines vertikalen Bauteils in einem Bohrloch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465839A1 (fr) * 1979-09-24 1981-03-27 Verstraeten Funderingstech Bv Procede de construction de pieux de beton avec socle elargi et pieux correspondants
US4637731A (en) * 1983-06-20 1987-01-20 Cellexfabrikerna Ab Device for making porous concrete
EP0441169A2 (fr) 1990-02-05 1991-08-14 KELLER GRUNDBAU GmbH Procédé et dispositif d'assainissement in situ de zones contaminées
WO1992014887A1 (fr) * 1991-02-25 1992-09-03 Antony Heath Dispositif melangeur pour un godet de chargeuse avant
WO1993002257A1 (fr) * 1991-07-18 1993-02-04 Bpa Byggproduktion Ab Outil servant a introduire un materiau de stabilisation dans le sol
DE4219150C1 (en) 1992-06-11 1993-09-23 Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen, De Underground mortar column prodn. - by drilling with auger through which hardenable suspension is fed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0436954B1 (fr) * 1990-01-11 1994-10-05 Seiko Kogyo Kabushiki Kaisha Machine de forage et de malaxage à double tube et méthode d'amélioration d'un sol de fondation utilisant ladite machine de forage et de malaxage à double tube
DE4013801C2 (de) * 1990-04-28 1994-12-22 Keller Grundbau Gmbh Verfahren zum Herstellen eines Trag- und/oder Abdichtungskörpers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2465839A1 (fr) * 1979-09-24 1981-03-27 Verstraeten Funderingstech Bv Procede de construction de pieux de beton avec socle elargi et pieux correspondants
US4637731A (en) * 1983-06-20 1987-01-20 Cellexfabrikerna Ab Device for making porous concrete
EP0441169A2 (fr) 1990-02-05 1991-08-14 KELLER GRUNDBAU GmbH Procédé et dispositif d'assainissement in situ de zones contaminées
WO1992014887A1 (fr) * 1991-02-25 1992-09-03 Antony Heath Dispositif melangeur pour un godet de chargeuse avant
WO1993002257A1 (fr) * 1991-07-18 1993-02-04 Bpa Byggproduktion Ab Outil servant a introduire un materiau de stabilisation dans le sol
DE4219150C1 (en) 1992-06-11 1993-09-23 Bauer Spezialtiefbau Gmbh, 86529 Schrobenhausen, De Underground mortar column prodn. - by drilling with auger through which hardenable suspension is fed

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1015498C2 (nl) * 2000-06-22 2001-12-28 In Situ Technieken B V Snij- en/of menginrichting.
EP1457602A2 (fr) * 2003-02-27 2004-09-15 BAUER Maschinen GmbH Procedée de produire une structure de fondation
EP1457602A3 (fr) * 2003-02-27 2006-01-04 BAUER Maschinen GmbH Procedée de produire une structure de fondation
DE102004038896A1 (de) * 2004-08-11 2006-02-23 Keller Grundbau Gmbh Verfahren zur Fundamentsicherung sowie Bohr- und Mischwerkzeug

Also Published As

Publication number Publication date
DE19825169A1 (de) 1999-12-16
DE19825169C2 (de) 2000-10-05

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