EP1672124B1 - Verfahren zur Herstellung von Schlitzwänden - Google Patents

Verfahren zur Herstellung von Schlitzwänden Download PDF

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Publication number
EP1672124B1
EP1672124B1 EP05292553.4A EP05292553A EP1672124B1 EP 1672124 B1 EP1672124 B1 EP 1672124B1 EP 05292553 A EP05292553 A EP 05292553A EP 1672124 B1 EP1672124 B1 EP 1672124B1
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EP
European Patent Office
Prior art keywords
trench
wall
binder
ground
process according
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.)
Active
Application number
EP05292553.4A
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English (en)
French (fr)
Other versions
EP1672124A2 (de
EP1672124A3 (de
Inventor
Alain Marchand
Bruno Renoud-Lias
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.)
Soletanche Freyssinet SA
Original Assignee
Soletanche Freyssinet SA
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Application filed by Soletanche Freyssinet SA filed Critical Soletanche Freyssinet SA
Priority to PL05292553T priority Critical patent/PL1672124T3/pl
Publication of EP1672124A2 publication Critical patent/EP1672124A2/de
Publication of EP1672124A3 publication Critical patent/EP1672124A3/de
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Publication of EP1672124B1 publication Critical patent/EP1672124B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • 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
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints

Definitions

  • the present invention relates to a method for producing molded walls of the type referred to as "SOIL MIXING".
  • This technique for producing molded walls consists in reusing the soil extracted during the production of the trench used to produce the molded wall and mixing the soil with a binder of the appropriate type in order to effectively obtain the molded wall defined by the shape of the trench. .
  • the present invention relates to the second mode of implementation of the so-called technique of soil mixing.
  • the slicer is equipped with binder injection pipes in the form of grout or concrete which is introduced into the cut-off ground using slicing tools and the vertical movement of the tools of the slicer simultaneously causes mixing or kneading of the binder with the ground to obtain, after setting the binder, the molded wall.
  • the pre-trench is a kind of confinement of the binder which will therefore be more easily driven by the tools of the slicer during the cutting operation of the ground to be mixed with the ground cut .
  • the side walls of the pre-trench are inclined, whereby the molded wall thus obtained has in cross section a portion flush with the surface of the soil wider than the rest of the wall.
  • a second object of the present invention is to provide a method of reinforcing a soil which is characterized in that it consists in producing a plurality of molded walls according to any of the embodiments of the method defined above. above in the ground area to strengthen.
  • the result which is not part of the claimed invention, is to provide a vertical linear wall molded in the ground as obtained by the implementation of the method defined above, the wall being characterized in that it comprises: an upper portion flush with the surface of the ground and a running portion buried in the ground, the running portion having a substantially constant width in cross-section, said upper portion having a flared shape such that the upper end of the wall has a width greater than that of the current part.
  • the wall to be made on the surface of the ground S is arranged at right, the wall to be produced being marked by the dashed lines P, a deposition of binder material. 10.
  • the linear volume of binding material 10 depends of course on the nature of the ground, the nature of the binder and the depth H of the molded wall to be made such that once mixed with the ground occupying the volume corresponding to the wall, we actually get a material with the desired characteristics to form the wall.
  • the entire trench corresponding to the wall is progressively made in such a way that simultaneously the binder 10 which was initially on the surface of the soil is mixed with the ground cut to obtain the wall 12. After obtaining this wall, it will be necessary to proceed to the arasion of the upper portion 14 in relief relative to the surface of the ground S.
  • binder 10 In order for the deposition of binder 10 to remain effectively in place of the tracing of the molded wall to be produced, it is necessary for it to have sufficient compactness or viscosity.
  • This binder is lime or a suitable cement.
  • a pre-trench 20 is made with the aid of any suitable machine.
  • the molded wall to be produced Preferably, this pre-trench has inclined lateral walls 22 so that the upper part of the pretrench 20 opening into the surface of the ground S has a width greater than the width e of the molded wall to be produced.
  • the width e of the running portion of the molded wall is between 0.25 m and 0.40 m
  • the width l of the upper part of the pre-trench 20 is between 0.25 m and 1 m.
  • the depth p of the pre-trench is between 0.40 m and 0.80.
  • the total height of the wall made H being for example between 3 and 6 m. More generally, the ratio between l and e is preferably between 1.2 and 2.5 and the depth p of the pre-trench is between 5 and 25% of the total height H of the wall.
  • Figures 1a to 1c The cross-sectional dimensions of the pre-trench 20 must be such that, of course, the binder 24 is completely contained therein and because of the effect of volume increase related to the excavation of the trench used to make the wall molded, the final molded wall is in its upper part completely contained in the pre-trench 20, which avoids having to proceed to the arasion of the upper end of the wall.
  • the trench 26 corresponding to the dimensions of the molded wall to be produced is cut and kneaded.
  • mixing of the cut ground with the binder 24 initially contained in the pre-trench 20 is carried out simultaneously. It is understood that this gives a very good mixing of the binder 24 and the ground constituting the trench. 26, by the vertical movement of the tools of the slicer. This ensures obtaining a molded wall of great homogeneity and therefore of high quality.
  • the molded wall obtained by the implementation of the improved method makes it possible to obtain a molded wall 28 whose current portion 30 has a substantially rectangular cross section and whose upper part 32 has a flared or trapezoidal shape such that the upper face 34 the upper portion 32 is flush with the surface of the ground S. It is thus understood that the upper surface 34 of the molded wall has a width greater than that of the running portion 30 of the diaphragm wall. With this arrangement, the bearing surface provided by the upper part of the molded wall for the constructions that will be carried out later on the soil surface, is very substantially increased, which improves the transfer of loads from the construction to the wall , while maintaining the same wall width.
  • the slicer may advantageously also include injection tubes for a liquid product which consists either of water alone or of water loaded with adjuvants conventionally used in cements or grouts or a bentonite sludge.
  • the binder is non-liquid.
  • the trench digging machine or slicer, simultaneously digs the entire depth of the trench.
  • the molded walls as obtained by the implementation of the method described above can advantageously be used to reinforce a floor in an area where one wants to build buildings or other constructions.
  • FIG 3 there is shown a first example of soil reinforcement structures consisting of five substantially identical rectilinear molded walls 40, 42, 44 and 46.
  • these walls have a depth of about 3 to 6 meters and the spacing between two adjacent walls can be from 2 to 5 meters.
  • the figure 4 shows another embodiment of the soil reinforcement structure.
  • the structure is constituted by a kind of rectilinear linear molded wall grids constituted by a first set of parallel walls 48 and a second set of parallel walls 50. These two wall assemblies are orthogonal to one another with respect to the other. In this case, the distance between the two adjacent walls can be between 2 and 5 meters.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (12)

  1. Verfahren zur Herstellung einer Schlitzwand im Boden, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    - Ausheben eines Vorgrabens mit reduzierter Tiefe entsprechend dem Verlauf der herzustellenden Wand, anschließend Anordnen eines Bindemittels in dem Vorgraben, wobei das Bindemittel Kalk oder ein Zement ist,
    - dann Ausheben eines der herzustellenden Wand entsprechenden Grabens mit Hilfe eines Grabenbaggers, unter gleichzeitigem Vermischen des Materials des Bodens mit dem anfangs in dem Vorgraben enthaltenen Bindemittel im gesamten Volumen des Grabens, wodurch die Schlitzwand erhalten wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Seitenwände des Vorgrabens geneigt sind, wodurch die so erhaltene Wand im Querschnitt einen an der Oberfläche des Bodens bündig abschließenden Teil, welcher breiter als der Rest der Wand ist, aufweist.
  3. Verfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass gleichzeitig mit dem Vermischen des Bindemittels und des Materials des Bodens eine Flüssigkeit in das Gemisch eingespritzt wird.
  4. Verfahren nach einem der Ansprüche 2 und 3, dadurch gekennzeichnet, dass das Volumen des Vorgrabens derart bestimmt ist, dass nach dem Vermischen des den Boden bildenden Materials, des Bindemittels und eventuell der Flüssigkeit, das Gemisch die obere Fläche des Vorgrabens bündig macht.
  5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Bindemittel nicht flüssig ist.
  6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Ausheben des Grabens und das Vermischen durch eine Maschine vollzogen werden, die sich entlang des Verlaufs der herzustellenden Wand bewegt.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Maschine gleichzeitig die gesamte Tiefe des Grabens aushebt.
  8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der durchgehende Teil des Grabens einen rechteckigen Querschnitt aufweist.
  9. Verfahren zum Verstärken eines Bodens, dadurch gekennzeichnet, dass es darin besteht, eine Vielzahl von Wänden nach einem der Ansprüche 1 bis 8 in dem zu verstärkenden Bereich des Bodens herzustellen.
  10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, dass die Wände im Wesentlichen geradlinig sind.
  11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass die Wände im Wesentlichen parallel zueinander verlaufen.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass die Wände in im Wesentlichen senkrechten Richtungen angeordnet sind.
EP05292553.4A 2004-12-17 2005-12-02 Verfahren zur Herstellung von Schlitzwänden Active EP1672124B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05292553T PL1672124T3 (pl) 2004-12-17 2005-12-02 Sposób wykonywania ścianki odlewanej w gruncie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0413487A FR2879632B1 (fr) 2004-12-17 2004-12-17 Procede de realisation de parois moulees

Publications (3)

Publication Number Publication Date
EP1672124A2 EP1672124A2 (de) 2006-06-21
EP1672124A3 EP1672124A3 (de) 2006-10-04
EP1672124B1 true EP1672124B1 (de) 2018-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05292553.4A Active EP1672124B1 (de) 2004-12-17 2005-12-02 Verfahren zur Herstellung von Schlitzwänden

Country Status (4)

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EP (1) EP1672124B1 (de)
ES (1) ES2669583T3 (de)
FR (1) FR2879632B1 (de)
PL (1) PL1672124T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101761069B (zh) * 2008-12-24 2011-07-20 上海市申江两岸开发建设投资(集团)有限公司 三墙合一地下连续墙施工方法
FR2969672B1 (fr) * 2010-12-24 2014-02-07 Soletanche Freyssinet Procede de renforcement de la resistance au renversement des fondations d'un pylone
FR2976003B1 (fr) 2011-06-01 2021-01-29 Soletanche Freyssinet Procede de fabrication d'une paroi de soutenement a partir d'une paroi brute en soil-mixing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957624A (en) * 1991-06-24 1999-09-28 Lockheed Martin Idaho Technologies Company Apparatus and method for in Situ installation of underground containment barriers under contaminated lands

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1458165A (fr) 1965-05-06 1966-03-04 Societanche Procédé et machine permettant la construction de voiles étanches dans le sol
US3603099A (en) * 1968-01-22 1971-09-07 Przed Specjalistyczne Gornictw Process of making intraground waterproof baffles and a device therefor
US3645101A (en) * 1970-11-04 1972-02-29 James L Sherard Method and apparatus for constructing impervious underground walls
JPH0739652B2 (ja) 1992-04-01 1995-05-01 北辰工業株式会社 地中連続壁用掘削装置と地中連続壁工法
CA2162029C (en) * 1993-05-03 2003-04-08 Bruce L. Bruso Method and apparatus for in situ soil remediaton
US5639182A (en) * 1995-10-12 1997-06-17 Paris; James L. In situ treatment of soil
EP0974634A1 (de) 1998-07-14 2000-01-26 BICC Public Limited Company Verfahren zur Bodenverbesserung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957624A (en) * 1991-06-24 1999-09-28 Lockheed Martin Idaho Technologies Company Apparatus and method for in Situ installation of underground containment barriers under contaminated lands

Also Published As

Publication number Publication date
FR2879632B1 (fr) 2007-04-20
FR2879632A1 (fr) 2006-06-23
ES2669583T3 (es) 2018-05-28
EP1672124A2 (de) 2006-06-21
EP1672124A3 (de) 2006-10-04
PL1672124T3 (pl) 2018-07-31

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