EP2714998B1 - Verfahren zum herstellen einer schlitzwand anhand eines rohen soil-mixing schlitzwandsteils - Google Patents

Verfahren zum herstellen einer schlitzwand anhand eines rohen soil-mixing schlitzwandsteils Download PDF

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Publication number
EP2714998B1
EP2714998B1 EP12731065.4A EP12731065A EP2714998B1 EP 2714998 B1 EP2714998 B1 EP 2714998B1 EP 12731065 A EP12731065 A EP 12731065A EP 2714998 B1 EP2714998 B1 EP 2714998B1
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Prior art keywords
wall
thickness
retaining
untreated
ground
Prior art date
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EP12731065.4A
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English (en)
French (fr)
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EP2714998A1 (de
Inventor
Philippe GANCEL
Daniel VIARGUES
Matthieu GUEYDIER
Fabrice Mathieu
Sabine Darson-Balleur
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Priority to PL12731065T priority Critical patent/PL2714998T3/pl
Publication of EP2714998A1 publication Critical patent/EP2714998A1/de
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Publication of EP2714998B1 publication Critical patent/EP2714998B1/de
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    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/06—Restraining of underground water
    • E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
    • E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
    • 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 the field of the manufacture of retaining walls in the ground, and retaining structures consisting of several retaining walls.
  • the invention relates more particularly to a method of manufacturing a retaining wall using an on-site mixing technique of the ground drilled to a binder (in English: soil-mixing).
  • this technique consists in mixing the ground in place with a binder in order to constitute elements of treated soil, having mechanical and / or geotechnical characteristics higher than those of the untreated natural ground.
  • adapted tools are used, such as those described in the documents WO 2007/116178 or FR 2,879,632 .
  • the material resulting from mixing the soil in place with the binder has the advantage of requiring fewer natural resources for its preparation.
  • the material obtained is the result of a mixture, it has characteristics very different from those of a concrete: this material is much less resistant, it is very heterogeneous, has microporosities and does not protect as much as a concrete any reinforcement that may be in the raw wall.
  • soil-binder material A big difference between concrete and the material resulting from mixing (called soil-binder material or soilmix) is its porosity. While a concrete will have a porosity of between 5 and 15% by volume, a soilmix material will have a porosity of between 30 and 65%. It is known that the greater the porosity of a material, the greater the kinetics of alteration of said material.
  • microporosity which is four to five times greater than that of a concrete, causes, when the sol-binder material is exposed to the air, desiccation and carbonation phenomena which degrade the mechanical characteristics of the material.
  • a disadvantage of this solution is to considerably increase the thickness of the wall of a retaining structure, which causes a loss of space available inside the structure. For example, when the retaining structure is in an underground car park, it is understood that the volume available to achieve the parking would be significantly reduced because of the significant thickness of the walls, which is not desirable.
  • the document JP 2001 032235 describes a similar process in which a layer of concrete is applied to the exposed pan to prevent erosion of the banks of a channel.
  • JPS5883729 discloses a method of manufacturing a wall in which a trench is made which is filled with a hardenable sludge.
  • An object of the invention is to propose a method of manufacturing a retaining wall from a raw wall obtained by means of an on-site mixing technique of ground drilled with a binder, in which the wall
  • the retaining wall can be integrated into a retaining structure, particularly in an underground car park, without significantly increasing the thickness of the gross wall.
  • the invention relates to a method according to claim 1.
  • the protective treatment product is intended to treat and protect the excavated pan (exposed and exposed to air) of the raw wall which is made in a soil-binder mixture, this binder preferably comprising a cement . That is to say that the protective treatment product makes it possible for the sol-binder material to retain its mechanical and physicochemical properties, even when said material is exposed to air.
  • the protective treatment product it is not necessary to have a thick concrete web whose function is in particular to overcome a possible reduction in the mechanical properties of the bulk wall, it being understood that the protective treatment product is not intended to take mechanical stresses on the retaining wall.
  • the polymeric product is preferably a resin, preferably an epoxy resin.
  • the thickness of the retaining wall is at most equal to 105% of the thickness of the thickness of the raw wall.
  • the thickness of a rough wall made with a drilling technique and simultaneous mixing of the soil in place with a binder is between 400 and 1000 millimeters. If the bulk wall has a thickness of about 500 millimeters, then the thickness of the retaining wall is at most equal to 525 millimeters. Even more preferably, the thickness of the retaining wall will be at most equal to 103% of the thickness of the raw wall, that is to say at most equal to 515 millimeters.
  • the step of producing the raw wall further comprises a step of introducing into the trench at least one stiffening element, and this before the solidification of the raw wall.
  • This stiffening element is for example a metal section which is inserted into the trench while the soil-binder mixture is still fresh. It allows stiffening and reinforcement of the raw wall.
  • the excavation step is carried out.
  • a step of planing the pan of the raw wall is carried out before the treatment step.
  • This planing step allows in particular to clean and flatten the pan. It also allows to discover locally or globally said at least one stiffening element.
  • the planing can be carried out mechanically and / or hydraulically. It may be followed by a high-pressure washing step.
  • the pan is planed according to its thickness, that is to say in a direction perpendicular to the pan, so as to discover said at least one stiffening element. Still preferably, the planing depth is about 10 millimeters.
  • the planing of the raw wall has the effect of locally reducing its thickness. Therefore, if the treatment product is of the penetrating type, it is understood that the thickness of the retaining wall may be slightly less than that of the raw wall. It will nevertheless remain substantially equal to the thickness of the raw wall. It is the same if the treatment product layer is less than the planing depth. In both situations, the thickness of the wall retaining wall will preferably be at least 95% of the thickness of the bulk wall. Preferably, the thickness of the retaining wall is therefore between 95 and 105% of the thickness of the raw wall.
  • an outer coating layer is obtained on the pan, the thickness of which is much smaller than the thickness of the raw wall, so that the The thickness of the retaining wall remains substantially equal to that of the raw wall.
  • the protective treatment product used here is therefore of the covering type. It may be in particular a resin, for example of the epoxy type, or an emulsion.
  • the thickness of the outer coating layer is less than or equal to ten millimeters.
  • the protective treatment product is a projectable waterproofing membrane.
  • the protective treatment product is a product penetrating the edge of the raw wall. This penetrating product makes it possible to treat a superficial thickness of the pan of the raw wall without increasing its thickness. It is therefore conceivable that the thickness of the retaining wall will remain approximately equal to that of the raw wall.
  • the protective treatment product is applied by brushing or spraying.
  • the invention further relates to a retaining wall according to claim 11, obtained by the implementation of the method according to the invention.
  • the invention further relates to a retaining structure, particularly in an underground car park, comprising a plurality of retaining walls according to the invention.
  • the figure 1 illustrates the first step of the method of manufacturing a retaining wall according to the invention: firstly a rough wall 10 is produced in the ground S with the aid of a suitable tooling 12 .
  • this rough wall 10 is made by a soil-mixing technique, that is to say by drilling and simultaneously mixing the soil in place with a binder injected into the trench.
  • This raw wall can be made by a continuous or discontinuous process.
  • the tool described in the document can be used. WO 2007/116178 .
  • the binder used is a cement. It will also be possible to use a grout, these types of binder being well known elsewhere.
  • the rough wall 10, made of a sol-binder material (sol-cement) may have a circular shape, prismatic, or any other shape.
  • the rough wall 10 has a height H, a length L and a thickness e1.
  • the rough wall 12 has a thickness of about 500 millimeters, and a height H of about 11 meters.
  • the rough wall 10 is surrounded by the ground S.
  • a step is introduced in the trench with a plurality of stiffening elements 14.
  • three metal sections the length of which, in this example, are introduced vertically side by side. , corresponds approximately to the height H of the bulk wall 10.
  • the profiles can be arranged at the edge of the trench excavation side, but not necessarily.
  • an excavation step is performed in which a volume of soil adjacent to the rough wall 10 is excavated so as to reveal a portion 16 of the rough wall 10.
  • the excavation step is performed on a vertical depth P less than the height of the raw wall, for example about 6 meters.
  • a step of mechanical planing of the pan is then carried out according to its thickness, in order to discover the stiffening elements 14, and to remove the sol-binder material which has been in contact with the surrounding terrain S.
  • a planed raw wall having a thickness e2 is then obtained , underlining that the planing is carried out on the entire surface of the excavated pan.
  • planing made until reaching the metal profiles 14.
  • planing the pan is made to a depth e3 of about 10 millimeters.
  • the thickness e2 is therefore approximately equal to 490 millimeters.
  • a planed rough wall treatment step 10 is then carried out during which a protective treatment product is applied to said pan 16.
  • the processing step can be performed by spraying the protective treatment product on the skirt 16. It can also be achieved by brushing when the treatment product is a spray.
  • the protective treatment product can either cover in a thin layer, or impregnate the pan to be treated.
  • the protective treatment product used is a covering product, so that, at the end of the treatment step of the figure 6 Is obtained on the skirt 12 an outer coating layer 18 whose thickness e4 is much less than the thickness e1 of the blank wall 10.
  • the thickness e4 of the outer coating layer 18 is d about eight millimeters.
  • the retaining wall 20 whose thickness e5 is about 498 millimeters.
  • the thickness e5 of the retaining wall 20 thus obtained is substantially equal to the thickness e1 of the raw wall 10.
  • a polymeric product for example an epoxy resin
  • Other types of coatings or resins may be used, in particular from the products described above.
  • the protective treatment product used is a penetrating product that permeates the pan 16 of the wall to be treated.
  • the penetrating treatment product is applied by brushing. Therefore, the application of this penetrating treatment product does not increase, or very little, the thickness e2 of the planed rough wall.
  • the thickness e2 of the retaining wall 20 ' thus obtained is approximately 490 millimeters, therefore slightly less than the thickness e1 of the bulk wall 10. It follows that the thickness e2 of the retaining wall 20 ' is between 95% and 105% of the thickness e1 of the bulk wall.
  • the thickness of the retaining wall 20 ' remains substantially equal to the thickness e1 of the rough wall 10.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Processing Of Solid Wastes (AREA)

Claims (12)

  1. Verfahren zur Herstellung einer Stützwand (20, 20'), umfassend:
    • einen Schritt zur Ausführung einer Rohwand (10) in einem Boden (S), umfassend einen Schritt einer Grabenbohrung in dem Boden und einen Schritt des gleichzeitigen Mischens des Bodens in situ mit einem Bindemittel, einen Schritt der Einführung zumindest eines Versteifungselements (14) in den Graben, und zwar vor der Verfestigung der Rohwand,
    • einen Schritt des Ausgrabens eines Volumens des Bodens benachbart zu der Rohwand auf eine Weise, um eine Fläche (16) der Rohwand freizulegen,
    • einen Schritt des Planierens der Fläche (16) der Rohwand gemäß ihrer Dicke, um das zumindest eine Versteifungselement (14) freizulegen, anschließend
    • einen Schritt zur Behandlung der Rohwand, bei der auf die planierte Rohwand ein Schutzbehandlungsprodukt umfassend ein Polymerprodukt auf eine Weise aufgebracht wird, um eine Stützwand zu erhalten, deren Dicke (e5) höchstens gleich 105 % der Dicke der Rohwand (10) ist.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Versteifungselement (14) ein Metallprofil ist, und dass der Schritt des Planierens ausgeführt wird, bis das Metallprofil erreicht wird.
  3. Verfahren nach Anspruch 1 oder 2, wobei am Ende des Behandlungsschrittes eine äußere Beschichtungsschicht (18) auf der Fläche (16) erhalten wird, deren Dicke (e4) viel geringer ist als die Dicke (e1) der Rohwand.
  4. Verfahren nach Anspruch 3, wobei die Dicke (e4) der Beschichtungsschicht (18) kleiner oder gleich zehn Millimeter ist.
  5. Verfahren nach einem der Ansprüche 3 oder 4, wobei das Schutzbehandlungsprodukt eine aufsprühbare Dichtungsmembran ist.
  6. Verfahren nach einem der Ansprüche 1 bis 5, wobei das Schutzbehandlungsprodukt ein Produkt ist, das in die Fläche der Rohwand eindringt.
  7. Verfahren nach Anspruch 6, wobei das Schutzbehandlungsprodukt ferner ein Mineralisierungsprodukt umfasst.
  8. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Schutzbehandlungsprodukt durch Aufbürsten oder durch Aufsprühen aufgebracht wird.
  9. Verfahren nach einem der Ansprüche 1 bis 8, wobei das Polymerprodukt ein Harz umfasst.
  10. Verfahren nach Anspruch 9, wobei das Harz ein Epoxidharz ist.
  11. Stützwand (20, 20') in einem Boden, die durch Ausführen des Verfahrens nach einem der Ansprüche 1 bis 10 erhalten wird, dadurch gekennzeichnet, dass die Wand aus einer Mischung des Bodens in situ mit einem Bindemittel besteht, wobei zumindest ein Versteifungselement vor der Verfestigung der Rohwand eingeführt wird, und dass die Wand ausgeführt wird, indem eine freigelegte Fläche der Rohwand gemäß ihrer Dicke planiert wird, auf eine Weise, um das zumindest eine Versteifungselement freizulegen, wobei die planierte Fläche mit einem Polymerprodukt behandelt wird.
  12. Stützwerk, insbesondere in einer Tiefgarage, umfassend eine Vielzahl von Stützwänden (20, 20') nach Anspruch 11.
EP12731065.4A 2011-06-01 2012-05-25 Verfahren zum herstellen einer schlitzwand anhand eines rohen soil-mixing schlitzwandsteils Active EP2714998B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12731065T PL2714998T3 (pl) 2011-06-01 2012-05-25 Sposób wytwarzania ściany oporowej ze surowej ściany w technice typu soilmixing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1154817A FR2976003B1 (fr) 2011-06-01 2011-06-01 Procede de fabrication d'une paroi de soutenement a partir d'une paroi brute en soil-mixing
PCT/FR2012/051178 WO2012168616A1 (fr) 2011-06-01 2012-05-25 Procede de fabrication d'une paroi de soutenement a partir d'une paroi brute en soil-mixing.

Publications (2)

Publication Number Publication Date
EP2714998A1 EP2714998A1 (de) 2014-04-09
EP2714998B1 true EP2714998B1 (de) 2018-12-26

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US (1) US9428879B2 (de)
EP (1) EP2714998B1 (de)
AU (1) AU2012266120B2 (de)
CA (1) CA2837506C (de)
FR (1) FR2976003B1 (de)
PL (1) PL2714998T3 (de)
WO (1) WO2012168616A1 (de)

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Publication number Priority date Publication date Assignee Title
AU2019404344A1 (en) 2018-12-21 2021-07-01 Tremco Incorporated Building foundation system

Citations (1)

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Publication number Priority date Publication date Assignee Title
JPS5883729A (ja) * 1981-11-11 1983-05-19 Ohbayashigumi Ltd 泥水固化連続壁の乾燥防止方法

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Also Published As

Publication number Publication date
US20140219729A1 (en) 2014-08-07
CA2837506C (en) 2018-03-27
FR2976003A1 (fr) 2012-12-07
AU2012266120A1 (en) 2014-01-09
PL2714998T3 (pl) 2019-07-31
EP2714998A1 (de) 2014-04-09
US9428879B2 (en) 2016-08-30
WO2012168616A1 (fr) 2012-12-13
AU2012266120B2 (en) 2017-08-10
CA2837506A1 (en) 2012-12-13
FR2976003B1 (fr) 2021-01-29

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