EP1069245B1 - Procédé d'amélioration de sols au moyen de colonnes de chaux - Google Patents

Procédé d'amélioration de sols au moyen de colonnes de chaux Download PDF

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Publication number
EP1069245B1
EP1069245B1 EP00114684A EP00114684A EP1069245B1 EP 1069245 B1 EP1069245 B1 EP 1069245B1 EP 00114684 A EP00114684 A EP 00114684A EP 00114684 A EP00114684 A EP 00114684A EP 1069245 B1 EP1069245 B1 EP 1069245B1
Authority
EP
European Patent Office
Prior art keywords
pipe
jacket pipe
bonding agent
jacket
flap
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
EP00114684A
Other languages
German (de)
English (en)
Other versions
EP1069245A1 (fr
Inventor
Winfried Dipl.-Ing. Seher
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.)
Keller Grundbau GmbH
Original Assignee
Keller Grundbau 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 Keller Grundbau GmbH filed Critical Keller Grundbau GmbH
Publication of EP1069245A1 publication Critical patent/EP1069245A1/fr
Application granted granted Critical
Publication of EP1069245B1 publication Critical patent/EP1069245B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the invention relates to a method for soil improvement by introducing a dry binder over a lowering tube that has been lowered into the ground cylindrical jacket tube and a flap located at the lower end of the jacket tube having. Furthermore, the invention relates to a device for performing this Process.
  • EP 0 903 440 A2 describes a method and a device for soil improvement known by means of powdery binder. After that, the binder is added Overpressure is blown into a lock tube via a feed tank the upper end of the lock tube is arranged. At the bottom of the lock tube, where a vibrator is arranged, the binder emerges from the lock tube out. The compressed air used to blow in the binder is over the Blown off the feed container, i.e. in front of the lock tube, which causes the air flow is low in the lock tube.
  • the present invention is based on the object of a method for soil improvement to provide with both bulk and grown Soil formations can be sustainably improved.
  • the solution is a procedure in the following sequence of steps: the lowering tube is closed Flap driven vertically into the ground to a predetermined depth
  • the dry binder is fed inside the jacket tube after filling of the casing pipe up to a part height with dry binding agent becomes the lowering pipe when the flap opens while continuing to add dry binder pulled out of the ground, creating a column of dry binder in the ground, wherein the dry binder with compressed air as a carrier medium in the jacket tube is blown while at the same time air from the lower end of the casing tube exits in this longitudinal inner tube.
  • Filling the casing tube in particular takes place up to half its height before it is pulled. The air can be sucked out of the jacket tube via the inner tube, as long as the binder is in a fluidized, highly air-enriched state located.
  • the device according to the invention comprises a countersunk tube consisting of a cylindrical Jacket tube and one arranged at the lower end of the jacket tube Flap, in which the casing tube at its upper end with a device for Promotion of the dry binder is connected and a compressed air generator or a blower for conveying the dry binder with compressed air as the carrier medium is provided in the jacket tube and an inner tube extending longitudinally in this ends freely in the casing tube with its lower end and out with its upper end emerges from the casing tube and is connected to the environment.
  • the inner tube can especially with a suction fan for extracting air from the jacket tube be connected.
  • a grid pattern with a grid dimension of in particular 15 to 100 cm is marked on the floor surface, in which each grid point the position of a Column determined.
  • the outer diameter of the casing tube corresponds essentially the final diameter of the individual column, in particular 100 to 200 mm.
  • dry binder introduced into the jacket tube air escaping through the inner tube at the same time can or is suctioned off.
  • the dry binder can be introduced with a suitable pump or with a blower, in which compressed air is then used as a carrier medium acts, take place.
  • the compressed air can also be pulsed here.
  • the compressed air should be released from the inner tube or, if necessary, for compression of the dry binder are sucked off, with the simultaneous sucking of binders should be avoided to a significant extent. Is the casing tube at least up to a partial height, for example half full, it gets slow pulled upwards out of the floor, the flap automatically opening or forced opening and the dry binder is relatively low as a column Diameter remains in the ground. After that, the device is moved to another Move the grid point of the grid and the process is repeated. It is particularly advantageous if lime and / or cement is used as the dry binder becomes.
  • the effect of the sink tube has several aspects, namely that Displacing the floor to form a cavity when pressed in of the sink pipe, then the entry of lime or cement into the cavity with simultaneous provisional piping of the cavity in the floor and finally the formation of the column made of binders in the ground when pulling the counterbore.
  • the lowering tube can be pulled continuously or in steps done at a predetermined speed, the Speed of pulling the speed of the if applicable adapted continued tracking of binder must become.
  • the lowering tube is usually attached to the leader of a crawler vehicle attached, the guide carriage provided with driving agents are.
  • the machine operator of the crawler vehicle can adjust the inclination of the Leader, the depth of driving in and the volume flow of added Monitor and control lime or cement.
  • a counterbore 11 according to the invention is shown in a vertical, user-friendly position.
  • This comprises a cylindrical jacket tube 12 and an inner tube 13 of smaller diameter running longitudinally therein, which is open at the bottom and ends freely at a smaller distance from the end of the jacket tube 12.
  • Means for holding the inner tube 13 in the casing tube 12 are not shown here for simplicity.
  • the lowering tube 11 has a head piece 14 at the upper end, which is used to engage a driving device. Below the head piece 14, the casing tube 12 has a first lateral connection 15, through which dry binder is blown into the casing tube.
  • the inner tube 13 has at the upper end below the head piece 14 a bend 16 which passes through the wall of the jacket tube and from which displaced air can escape from the jacket tube 12, or air can be sucked out of the inner tube 13 and thus from the jacket tube 12, as indicated by symbols.
  • the casing pipe has a flap 17 which can close the casing pipe when it is driven into the ground, while it can open automatically when the sink pipe is pulled out of the ground, so that a flow of the dry binder, which is indicated by an arrow 18 , can emerge from the casing tube.
  • the outer diameter of the casing tube is marked with d m .
  • FIG. 2 a perspective view of a section of a floor surface is symbolized, on which a grid grid 21 is shown, the crossing points of which are spaced apart from one another in two directions perpendicular to one another by the same unit distance a.
  • Completed columns 22 are visible on part of the grid points, two of which are shown in vertical section; these have column diameters d s .
  • FIG 3 is a vertical section through an upper layer of soil shown.
  • a caterpillar vehicle on the ground surface 31 32 on.
  • This has a vertically positioned leader 33 with a slide 34.
  • a lowering tube 11 is on the slide 34 attached, which has already been described previously.
  • To the caterpillar leads a hose 35, which to the top End of the counterbore 11 leads.
  • Another arrow indicates the general direction of work progress of the crawler vehicle indicated.
  • FIG 3c is the next phase of column manufacture shown shortly before graduation.
  • the lowering tube 11 is as through indicated an arrow, largely pulled out of the ground. at open flap at the lower end of the countersunk tube is due to flowing out the dry binder another column 22 almost completed.
  • Figure 4 are the device units for supplying the line 35 shown. Specifically, there is a silo 41 for dry binder shown from which via a screw conveyor 42 Drive motor 43 binder in a hopper 44 one Dosing pump 45 is abandoned. At the metering pump 45 is a Compressed air compressor 46 connected, the compressed air as a carrier medium generated for the binder, which is then via the line 35 is promoted to the lowering tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Agronomy & Crop Science (AREA)
  • Civil Engineering (AREA)
  • Soil Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Fertilizers (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Claims (10)

  1. Procédé d'amélioration des sols au moyen de l'introduction d'un liant sec par un tuyau vertical (11) enfoncé auparavant dans le sol, qui comprend un tuyau-fourreau cylindrique (12) et un clapet (17) disposé à l'extrémité inférieure du tuyau-fourreau, comprenant les étapes suivantes :
    le tuyau vertical est introduit, avec le clapet fermé, dans le sol verticalement jusqu'à une profondeur prédéfinie,
    le liant sec est conduit à l'intérieur du tuyau-fourreau,
    après le remplissage du tuyau-fourreau jusqu'à une hauteur partielle avec du liant sec, le tuyau vertical avec le clapet ouvert, est retiré du sol, tout en continuant l'introduction de liant, une colonne de liant sec se formant dans le sol, le liant sec étant insufflé dans le tuyau-fourreau par de l'air comprimé comme milieu porteur,
       caractérisé en ce que pendant l'insufflation, de l'air sort en même temps de l'extrémité inférieure du tuyau-fourreau, dans l'environnement par un tuyau interne (13) disposé longitudinalement dans le tuyau-fourreau.
  2. Procédé selon la revendication 1, caractérisé en ce que le remplissage du tuyau-fourreau a lieu au moins jusqu'à mi-hauteur avant d'être retiré.
  3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que l'air est aspiré du tuyau-fourreau par le tuyau interne.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'un réseau en treillis a été marqué auparavant sur la surface du sol, où chaque point du réseau définit la position d'une colonne.
  5. Procédé selon la revendication 4, caractérisé en ce que les lignes du réseau sont marquées avec une distance égale entre elles variant entre 15 et 100 cm.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les colonnes sont produites avec un diamètre de 100 à 200 mm.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que pour le liant sec on utilise de la chaux, ou du ciment ou un mélange des deux.
  8. Dispositif d'amélioration des sols au moyen de l'introduction d'un liant sec, comprenant un tuyau vertical (11), qui comprend un tuyau-fourreau cylindrique (12) et un clapet (17) disposé à l'extrémité inférieure du tuyau-fourreau, dans lequel le tuyau-fourreau est relié à son extrémité supérieure à un dispositif (15) pour le transport du liant sec, un compresseur d'air (45) ou un ventilateur étant prévu pour le transport du liant sec en utilisant de l'air comprimé comme milieu porteur dans le tuyau-fourreau, caractérisé en ce que dans le tuyau-fourreau un tuyau interne (13) à parcours longitudinal finit par son extrémité inférieure librement dans le tuyau-fourreau et par son extrémité supérieure sort du tuyau-fourreau et est relié à l'environnement.
  9. Dispositif selon la revendication 8, caractérisé en ce qu'un ventilateur aspirant pour l'extraction de l'air du tuyau-fourreau est relié à l'extrémité supérieure du tuyau interne.
  10. Dispositif selon la revendication 8 ou 9, caractérisé en ce que le tuyau vertical est fixé sur une des jumelles (33) d'un véhicule sur chenilles (32).
EP00114684A 1999-07-16 2000-07-08 Procédé d'amélioration de sols au moyen de colonnes de chaux Expired - Lifetime EP1069245B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9909376 1999-07-16
FR9909376A FR2796405B1 (fr) 1999-07-16 1999-07-16 Procede d'amelioration de sols au moyen de colonnes de chaux

Publications (2)

Publication Number Publication Date
EP1069245A1 EP1069245A1 (fr) 2001-01-17
EP1069245B1 true EP1069245B1 (fr) 2003-12-17

Family

ID=9548289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00114684A Expired - Lifetime EP1069245B1 (fr) 1999-07-16 2000-07-08 Procédé d'amélioration de sols au moyen de colonnes de chaux

Country Status (5)

Country Link
EP (1) EP1069245B1 (fr)
AT (1) ATE256791T1 (fr)
DE (1) DE50004768D1 (fr)
ES (1) ES2213524T3 (fr)
FR (1) FR2796405B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10310727B4 (de) * 2003-03-12 2007-09-13 Bauer Spezialtiefbau Gmbh Füllrohr
DE10311186B4 (de) * 2003-03-12 2008-04-03 Redox Gmbh Verfahren zur Beschleunigung der Restverwesung von Wachsleichen
DE102005001227A1 (de) * 2005-01-10 2006-07-20 Keller Grundbau Gmbh Baugrundverbesserung durch Hybrid- Säulen
FI123541B (fi) * 2011-06-28 2013-06-28 Allu Group Oy Menetelmä sideaineen siirtoilman poistamiseksi paineilman ja sideaineen seoksesta stabiloitaessa maamassoja sideainelisäyksen avulla

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63284308A (ja) * 1987-05-18 1988-11-21 Hazama Gumi Ltd 砕石杭およびその施工方法
DE4125576A1 (de) * 1991-08-02 1993-02-04 Gerd Prof Dr Ing Gudehus Verfahren zum einpressen von pulver in weichem boden
DE4137541C2 (de) 1991-11-14 1999-09-16 Keller Grundbau Gmbh Arbeitsgerät zur Herstellung von Ortbetonpfählen
JP2948468B2 (ja) * 1994-04-05 1999-09-13 中富 栗本 地盤改良杭造成装置
JPH08311857A (ja) * 1995-05-12 1996-11-26 Hatsuyou Kensetsu Kk 既存建物内外部基礎補強工法
DE29716673U1 (de) * 1997-09-17 1998-01-02 Keller Grundbau Gmbh, 63067 Offenbach Vorrichtung zur Bodenverbesserung mittels pulvrigem Bindemittel

Also Published As

Publication number Publication date
DE50004768D1 (de) 2004-01-29
FR2796405A1 (fr) 2001-01-19
ES2213524T3 (es) 2004-09-01
FR2796405B1 (fr) 2001-09-07
ATE256791T1 (de) 2004-01-15
EP1069245A1 (fr) 2001-01-17

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