EP0513461B1 - Procédé pour la réalisation de parois minces dans le sol et dispositif pour sa mise en oeuvre - Google Patents

Procédé pour la réalisation de parois minces dans le sol et dispositif pour sa mise en oeuvre Download PDF

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Publication number
EP0513461B1
EP0513461B1 EP91402175A EP91402175A EP0513461B1 EP 0513461 B1 EP0513461 B1 EP 0513461B1 EP 91402175 A EP91402175 A EP 91402175A EP 91402175 A EP91402175 A EP 91402175A EP 0513461 B1 EP0513461 B1 EP 0513461B1
Authority
EP
European Patent Office
Prior art keywords
high pressure
wall
grout
liquid
jet
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
EP91402175A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0513461A1 (fr
Inventor
Dieter Volk
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.)
Compagnie du Sol SARL
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Compagnie du Sol SARL
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Publication date
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Application filed by Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP0513461A1 publication Critical patent/EP0513461A1/fr
Application granted granted Critical
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/24—Placing by using fluid jets
    • 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

Definitions

  • the present invention relates to a new method for producing thin walls in the ground and to a device for implementing this method.
  • Such walls can be less than ten centimeters thick and more than 10 meters high.
  • a beam or sheet pile having a generally H-shaped section which is driven into the ground using a vibrator along the path of the wall which it is desired to make.
  • a grout based on cement or another hardening product is injected into the lower part of the beam in order to produce the thin wall in place of and in the vicinity of the beam. The injection can also be carried out during the ascent of the beam.
  • the grout is injected at a low pressure, for example of a few tens of kilos per cm2, which is sufficient to maintain the ground and constitute the thin wall.
  • This method has the disadvantage of being relatively long to implement because it is necessary to beat or vibrate the beam in many successive positions which overlap, so that each threshing produces a width wall that is less than the width of the beam.
  • the vibrations to which the beam is subjected can in certain cases disintegrate fine soils in the vicinity of the beam by creating pockets of debris in the wall which has just been produced and which therefore has a defective seal.
  • Another method for producing thin walls which consists in driving from place to place along the path which the thin wall must occupy, a train of rods which is provided at its lower part with nozzles by which a grout of cement at very high pressure, for example at pressures between 200 and 600 kilos per cm2, so as to cut in the ground by the technique called "jetting", a wall section which will be filled with a cement grout which, after hardening, will form the thin wall.
  • the jets of cement grout under high pressure are directed substantially in the plane of the wall to be produced, it being understood however that the jets sent from two neighboring boreholes must form a slight angle between them so as to overlap preferably substantially equidistant from the two piles.
  • This known method has the drawback that if a slight angular error occurs in the positioning of the piles, the continuity is lost, that is to say the tightness of the wall. In addition, it does not allow in practice to produce thin walls.
  • the subject of the present invention is a method which avoids the drawbacks of the methods mentioned above, and which makes it possible to produce thin walls in an efficient and economical manner.
  • the subject of the present invention is a new process for producing continuous thin walls in the ground of the type in which a vertical beam or sheet pile which has been successively pressed into vibrations in the ground, along the path of the wall to be produced. a thickness corresponding substantially to that of the wall to be produced and which comprises at its lower part a device for injecting into the ground a grout which, after solidification, constitutes the thin wall, a process characterized by the fact that the part is sent to the bottom of the beam or the sheet pile at least one jet of liquid at a very high pressure at least equal to two hundred kilos per cm2 directed in the plane of the wall to be produced.
  • the very high pressure liquid is sprayed with a pressure which can be for example a few hundred kilos per cm2.
  • the liquid which, according to the invention, is injected at very high pressure into the lower part of the beam can advantageously consist of a cement grout or another product which contains sufficient aggregate to harden it, allowing the wall to be produced.
  • This injection of liquid at very high pressure can be accompanied by an injection of gas and / or of another liquid at a relatively low pressure, for example of a few tens of kilos per cm 2.
  • the spraying of the liquid at very high pressure takes place below the beam, from a nozzle which is located at the rear of the beam, (that is to say in the vicinity of the part of the wall which has already been produced) and in the direction of the part of the wall to be produced.
  • a grout jet is sent to the already formed wall under very high pressure, possibly accompanied by an air jet of a nature to form the wall by hardening. This causes kneading of the grout which constitutes the upstream wall already formed and one thus destroys the pockets of ground debris which it could contain.
  • this very high pressure jet avoids that under the action of the vibro-sinking of the beam, the ground which is below it does not flow back into the part of the thin wall which has already been performed, this due to the fact that the very high pressure jet tends to reject the ground downstream, in the direction of the thin wall which remains to be produced.
  • the action of the jet at very high pressure is exerted at a significant distance downstream of the beam, which makes it possible to increase the distance between the successive threshing positions of the beam.
  • the excavation of the thin wall can even be carried out between two threshing positions only by the very high pressure jet, so that the distance which separates two successive threshing of the beam can be substantially greater than the width of the beam, so that in the known technique, it is less than or equal to this width.
  • the present invention also relates to an apparatus for producing continuous thin walls in the ground of the type comprising a vertical beam or sheet pile of reference H-section actuated by a vibro-beater, which has a thickness corresponding substantially to that of the wall to be produced and which is provided at its lower part with a device for injecting grout, this apparatus being characterized in that the beam or sheet pile comprises at its lower part at least one device for sending a liquid at a very high pressure at least equal to two hundred kilos per cm2 in the plane of the thin wall being produced.
  • this device is advantageously located below and behind the lower end of the beam, so that the jet of liquid under very high pressure is sent below the beam, towards the wall to be made.
  • the apparatus according to the invention further comprises a device for sending grout at very high pressure, which is placed at the lower part of the beam upstream, on the side of the part of the wall that is already made.
  • the device directs the grout jet under very high pressure only upstream, that is to say in the direction of the thin wall already produced.
  • the apparatus according to the invention may also include a device for sending a gas and / or a liquid under relatively low pressure, in parallel and in the vicinity of the jet of liquid at very high pressure.
  • FIG. 1 There is schematically shown in Figure 1 a vertical beam or sheet pile 1 used to produce according to a traditional method a thin wall of cement grout or other curable materials.
  • the beam 1 is driven into the ground using a vibrator 3 suspended from the end of the mast 4 of a lifting machine 5 and guided by a vertical mast 3 a .
  • an injection device 6 shown diagrammatically which sends grout under a relatively low pressure to the base of the beam which is being threshing.
  • the grout thus injected serves to facilitate the descent of the beam and, during the ascent, to fill the void left by the depression of the beam 1.
  • successive sinking of the beam 1 is carried out by moving it to the right at most a distance corresponding to its width.
  • the beam can only be moved to the right for a new threshing by a distance less than its width so as to obtain an overlap of the footprints left by the beam in the ground.
  • the beam 1 has an H-shaped section having a core 7 joining two wings 8 and 9. A its lower part the beam 1 is reinforced by extra thicknesses 7 a , 8 a and 9 b making it possible to make an imprint in the ground with dimensions greater than those of the current section of the beam.
  • the lower end of the beam 1 also has on its left part a fin 10 located in the extension of the core 7. This fin is intended to engage in the part of the wall which has been produced. during the previous threshing of the beam.
  • a nozzle 11 has been placed at the lower part of the beam, making it possible to send a jet of grout 12 at very high pressure substantially horizontal in the plane of the thin wall, that is to say in the plane of the core 7 of the beam 1.
  • composition of this grout based on water, cement and aggregates is such that it can, after solidification, constitute the thin wall.
  • This grout projected under very high pressure at 12 causes cutting of the ground below the beam 1 and on the right beyond this beam in the plane of the wall which must be produced.
  • the very high pressure grout is supplied by a tube 14 disposed along the wing 9.
  • the implementation, in accordance with the invention, of sending the grout under very high pressure to the lower part of the beam 1 has the multiple advantage of pushing back the ground which is falling apart under the beam 1 by preventing it from engage to the left in the part of the wall that has already been made, to facilitate the insertion of the beam 1, which makes it easier to work and save energy, and to achieve a flat cavity downstream of the beam 1, that is to say on the right as seen in FIG. 2, cavity which is used for the subsequent molding of the planar wall.
  • the footprints overlap.
  • the second embodiment of the invention which is shown in Figures 4 and 5 differs from the embodiment of Figures 2 and 3 by the fact that the nozzle for sending liquid, for example water, very high pressure is located on the right part 8 a of the lower end of the beam 1, so that the nozzle 11 a projects a jet 12 a at very high pressure only downstream of the beam 1, that is to say - say in the part of the ground which has not yet been worked by the driving in of beam 1.
  • liquid for example water
  • the nozzle 6 supplied by the pipe 15 provides the base 1 of the beam 1 of the grout which, after solidification, will ensure the formation of the thin wall.
  • a nozzle 17 for sending grout at very high pressure which projects a jet 18 into the part of the thin wall which has already been made during previous threshing, which has the advantage of eliminating any pocket of land which could remain in this part of the thin wall.
  • a very high pressure water jet 12 is also sent via the nozzle 11 and the pipe 14 which is directed downstream to the part of the wall which remains to be produced.
  • a compressed air jet 12 b which comes via line 14 b and which opens in the immediate vicinity of the water jet 12, which facilitates the penetration of the latter in the soil.
  • the nozzle 6 brings the grout under relatively low pressure to occupy the cavity formed in the ground by the high pressure water jet 12 and form the wall after hardening.
  • the fourth embodiment according to FIGS. 8 and 9 comprises a nozzle 11 for projecting water at very high pressure downstream, towards the part of the wall which is not yet produced, as well as a nozzle projection of grout at very high pressure 17 upstream, in the opposite direction.
  • the jet 12 of water at very high pressure cuts the ground where the wall is to be made, while the jet 18 of grout 18 at very high pressure, mixes the grout in the wall which has just been carried out to eliminate pockets of ground which could remain in the grout.
  • the nozzle 11 a sends a jet of grout 12 a , preferably at high pressure, to fill with grout the cavity produced by the very high pressure water jet 12, and the nozzle 11 c sends in the vicinity of the jet of grout 12 a , a jet of compressed air 12 c which arrives via the line 14 c .
  • the mixing of the air with the grout jet 12 a allows a better distribution of the grout and a better penetration of the jet 12 a .
  • the invention makes it possible, by simple means, to considerably improve the productivity of an apparatus for producing thin walls in the ground while increasing the quality of these walls.
  • the configuration of the lower part of the beam 1 or sheet pile can be modified according to the opportunities, insofar as the retention at the lower part of the vertical beam is maintained.
  • the liquid sent at very high pressure can for example be water and / or grout, and that a gas such as air, can be injected in the vicinity of or injection points for very high pressure liquids.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Coating With Molten Metal (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Load-Bearing And Curtain Walls (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Processing Of Solid Wastes (AREA)
EP91402175A 1991-05-14 1991-08-02 Procédé pour la réalisation de parois minces dans le sol et dispositif pour sa mise en oeuvre Expired - Lifetime EP0513461B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9105798 1991-05-14
FR9105798A FR2676479A1 (fr) 1991-05-14 1991-05-14 Procede pour la realisation de parois minces dans le sol et dispositif pour sa mise en óoeuvre.

Publications (2)

Publication Number Publication Date
EP0513461A1 EP0513461A1 (fr) 1992-11-19
EP0513461B1 true EP0513461B1 (fr) 1995-05-10

Family

ID=9412745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402175A Expired - Lifetime EP0513461B1 (fr) 1991-05-14 1991-08-02 Procédé pour la réalisation de parois minces dans le sol et dispositif pour sa mise en oeuvre

Country Status (11)

Country Link
EP (1) EP0513461B1 (enrdf_load_stackoverflow)
AT (1) ATE122426T1 (enrdf_load_stackoverflow)
CZ (1) CZ283668B6 (enrdf_load_stackoverflow)
DE (2) DE513461T1 (enrdf_load_stackoverflow)
DK (1) DK0513461T3 (enrdf_load_stackoverflow)
ES (1) ES2036508T3 (enrdf_load_stackoverflow)
FR (1) FR2676479A1 (enrdf_load_stackoverflow)
GR (1) GR930300017T1 (enrdf_load_stackoverflow)
HU (1) HU216962B (enrdf_load_stackoverflow)
SK (1) SK283977B6 (enrdf_load_stackoverflow)
WO (1) WO1992020873A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712317B1 (fr) * 1993-11-12 1995-12-29 Sol Cie Procédé de réalisation de parois minces dans le sol.
DE19524775B4 (de) * 1995-07-07 2013-09-05 Bilfinger SE Vorrichtung zum Herstellen einer Schmalwand
DE19740800B4 (de) * 1997-09-17 2006-10-26 Bilfinger Berger Ag Verfahren zum Einbringen von Bohlen in Erdreich

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS514003B1 (enrdf_load_stackoverflow) * 1970-11-12 1976-02-07
FR2316383A1 (fr) * 1975-07-03 1977-01-28 Soletanche Procede et dispositif pour la realisation d'ecrans d'etancheite dans le sol par lancage
GB1558694A (en) * 1977-08-10 1980-01-09 Kajima Corp Consolidation of underground masses
JPS54155607A (en) * 1978-04-06 1979-12-07 Hisaharu Nakashima Method of pile driving construction to base rock
DE2844794A1 (de) * 1978-10-13 1980-04-24 Brechtel Johannes Vorrichtung zur herstellung einer schmalwand
JPS55105021A (en) * 1979-02-07 1980-08-12 Shigeo Takamura High pressure chemichal liquid grouting method utilizing high frequency vibration pressure

Also Published As

Publication number Publication date
HU216962B (hu) 1999-10-28
ES2036508T3 (es) 1995-07-16
HUT63894A (en) 1993-10-28
DE513461T1 (de) 1993-05-19
EP0513461A1 (fr) 1992-11-19
CZ283668B6 (cs) 1998-05-13
HU9300018D0 (en) 1993-06-28
GR930300017T1 (en) 1993-04-28
DK0513461T3 (da) 1995-07-17
ATE122426T1 (de) 1995-05-15
FR2676479B1 (enrdf_load_stackoverflow) 1995-06-02
SK9193A3 (en) 1993-07-07
ES2036508T1 (es) 1993-06-01
SK283977B6 (sk) 2004-06-08
DE69109663D1 (de) 1995-06-14
DE69109663T2 (de) 1995-09-07
FR2676479A1 (fr) 1992-11-20
WO1992020873A1 (fr) 1992-11-26
CZ390492A3 (en) 1993-07-14

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