EP2655750B1 - Verfahren zur modifizierung einer stützwand mit bewehrter erde - Google Patents

Verfahren zur modifizierung einer stützwand mit bewehrter erde Download PDF

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Publication number
EP2655750B1
EP2655750B1 EP11815532.4A EP11815532A EP2655750B1 EP 2655750 B1 EP2655750 B1 EP 2655750B1 EP 11815532 A EP11815532 A EP 11815532A EP 2655750 B1 EP2655750 B1 EP 2655750B1
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EP
European Patent Office
Prior art keywords
facing
elements
outer face
parement
reinforced soil
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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.)
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Application number
EP11815532.4A
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English (en)
French (fr)
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EP2655750A1 (de
Inventor
Nicolas Freitag
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Terre Armee Internationale
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Terre Armee Internationale
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D37/00—Repair of damaged foundations or foundation structures
    • 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
    • E02D29/0225—Retaining or protecting walls comprising retention means in the backfill
    • E02D29/0241—Retaining or protecting walls comprising retention means in the backfill the retention means being reinforced earth elements

Definitions

  • the present invention relates to a method of modifying a civil engineering work using reinforced soil techniques, for example a reinforced embankment work.
  • a process according to the preamble of claim 1 is known by FR 2860 811 A1 .
  • the works concerned by the invention may have various uses such as for example traffic lanes, extend a building space, prevent the deterioration, erosion or falling stones of walls or rock walls, or create an aesthetic mass .
  • a reinforced soil structure generally combines a compacted backfill, a facing and reinforcements or stabilizing elements connected to the facing.
  • the stabilizing elements are placed in the soil with a density depending on the stresses that can be exerted on the structure, the thrust forces of the ground being taken up by the soil-reinforcement friction.
  • the facing is most often made from prefabricated concrete elements in the form of slabs or blocks, juxtaposed to cover the front face of the structure. There may be horizontal recesses on this front face between different levels of the facing, when the structure has one or more terraces.
  • Stabilization elements placed in the embankment are usually joined to the facing with the help of mechanical connection members that can take various forms. Once the work is completed, the stabilization elements distributed in the embankment transmit high loads, up to several tons. Their connection to the facing must be robust to maintain the cohesion of the whole.
  • a structure initially supporting four traffic lanes may need to be modified to accommodate six lanes.
  • the siding deteriorates, for example due to a use of the work not originally planned or due to a defect in the manufacture of the siding.
  • Concrete facing elements can suffer from concrete pathologies.
  • the concrete pathologies known to those skilled in the art which may lead to swelling of the facing elements include, for example, alkaline reactions occurring within the concrete or internal sulphate reactions.
  • the internal swelling of the crystals can lead to the cracking then to the progressive fragmentation of the concrete composing the facing.
  • This swelling can take place over several months or years. However, it is not detectable at the time of construction of the structure and this swelling can also be accelerated by adverse weather conditions.
  • Facing elements of a structure in reinforced soil play an important role in the stabilization of the structure.
  • these facing elements also play an architectonic role.
  • repair solutions consist essentially of replacing damaged or degraded siding elements.
  • the method according to the invention does not require any removal operation of the facing elements.
  • the implementation of the method according to the invention does not present risks of landslide or erosion so that the operations are simplified and the security significantly improved.
  • the invention also relates to a reinforced soil structure modified by means of a method according to the invention.
  • the figure 1 illustrates a retaining wall on reinforced ground.
  • a compacted embankment 1 in which are distributed stabilizing elements 2 and delimited on the front face of the structure by a first facing 3 formed by juxtaposing prefabricated elements 4 in the form of panels and on the rear side by the ground 5 against which is directed the retaining wall.
  • the stabilizing elements 2 are linear elements such as rolled steel reinforcements or geotextile strips.
  • the stabilizing elements 2 may comprise metal or synthetic reinforcements, for example in the form of flexible bands extending in planes. horizontally at the rear of the first siding 3. It may especially be reinforcing strips based on polyethylene fibers wrapped in polyethylene.
  • the stabilizing elements 2 are anchored to the rear face of the facing elements 4, for example by means of expansion plugs, sealed tabs, metal nails or rings or any other anchoring means known to the man. of career.
  • the method according to the invention makes it possible to modify a structure in reinforced soil as shown in FIG. figure 2a .
  • the method according to the invention may allow for example to enlarge the structure in reinforced soil. This may be of interest especially if the reinforced soil structure supports a road and it is desirable to widen this road.
  • This reinforced soil structure comprises a backfill 1, a first facing 3 comprising an outer face 8 defining the front face of the structure.
  • the first facing is composed of a set of first facing elements 4.
  • the reinforced soil structure further comprises first stabilizing elements 2 connected to the different first facing elements 4 and extending into a reinforced area of the embankment 1 located at the rear of the front face of the work.
  • the figure 2a illustrates a first step of the method according to the invention.
  • this first step of the method at least one of the stabilizing elements 2 connected preferably to the lowest facing is disconnected.
  • the stabilizing element 4 can be tensioned by means of return elements as described in the application FR0312083 .
  • the method according to this first embodiment then comprises a step of setting up a second facing illustrated on the figure 2b .
  • an element 14 of the second facing is disposed along the outer face of the first facing 4 so as to define a volume to be backfilled 16.
  • the method according to this first embodiment then comprises an embankment step illustrated on the Figure 2c .
  • backfill material is brought and compacted progressively in the volume 16 defined between the first facing element 4 and the second facing element 14, until reaching the level of the coring made in the first element facing 4.
  • backfill material materials that can be used as backfill material are natural soils, soils treated or stabilized with lime or hydraulic binder, recycling materials such as recycled concrete, road mills, some industrial combustion residues. or garbage, etc.
  • the method then comprises a step of setting up a second stabilization element illustrated on the figure 2d .
  • this step of setting up a second stabilizing element there is a stabilizing element 12 on the embankment previously brought and compacted.
  • This second stabilizing element 12 is connected to the first stabilizing element 2, so as to form a new stabilizing element comprising the first stabilizing element 2 and the second stabilizing element 12 connected to each other.
  • the second stabilizing element 12 may be connected to the first stabilizing element 2 by any connection means known to those skilled in the art.
  • Backfill material is then provided over the second stabilizing element 12 which has just been installed. This backfill material is compacted as and when it is added.
  • the steps can be repeated as much as necessary if several levels of stabilizing elements are arranged in the reinforced soil structure to be modified.
  • the new stabilizing element comprising the first and second stabilizing elements 2 and 12 after connecting the first and second stabilizing elements to each other.
  • This power can be done for example by means of a mechanical clamping device such as a tensioner.
  • the second facing element 14 has substantially the same shape and dimension as the first facing elements 4.
  • the implementation of the method is simplified and this gives the reinforced soil structure flexibility properties substantially identical to those of the original structure.
  • the method according to the invention makes it possible to repair a structure in reinforced soil whose cladding elements have been degraded.
  • This reinforced soil structure comprises a backfill 1, a first facing 3 having an outer face 8 defining the front face of the structure.
  • the first facing being composed of a set of first facing elements 4.
  • the reinforced soil structure further comprises first stabilizing elements 2 connected to the different first facing elements 4 and extending in a reinforced area of the embankment 1 located at the rear of the front face of the work.
  • the method according to the invention makes it possible to repair the structure without the need to replace the facing elements 4 one by one, thus avoiding a long, minute and risky process.
  • the method according to the invention comprises a first step during which a first stabilizing element 2 connected to a first facing element 4 is disconnected, preferably one of the first facing elements situated at the base of the structure in the ground. strengthened.
  • This disconnection can be achieved for example by opening from the outer face of the first facing element 4, for example by sawing, percussion or coring. Following this disconnection, it comes to have a second facing element 14 along the outer face of the first facing element, preferably against the first facing element.
  • the first stabilizing element 2 is then connected to the second facing element 14 as shown in FIG. figure 3b .
  • the stabilizing element 2 can be maintained in tension after the coring step or can be tensioned once connected to the second facing element 14.
  • the second facing member 14 may be provided with anchoring means for anchoring the first stabilizing element 2 to the second facing member 14 and tensioning means, for example a tensioner .
  • a complete geotextile seal on the front face of the structure to to fix.
  • This seal can also be placed so as to cover the joints between the elements of the first facing; for example by gluing geotextile joint strips on the first facing.
  • a compressible sheet for example made of elastomer, may be placed between the first facing elements 4 and the second facing elements 14.
  • the stabilizing elements 2 are brought into tension before being connected to the second facing element 14 is facilitated.
  • This variant of the invention is particularly advantageous when the first facing elements 4 may continue to degrade over time, in particular, by swelling.
  • the new facing elements are substantially identical to the old facing elements and arranged so substantially identical to these.
  • the implementation of the method is simplified and this gives the reinforced soil structure flexibility properties substantially identical to those of the original structure.
  • a second facing comprising a lattice 16, for example metallic, which will be connected to the stabilizing elements 2.
  • the second facing element is then constituted by means of methods of spraying concrete onto the trellis to which the stabilizing elements 2 have been previously connected.

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)
  • Environmental & Geological Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Retaining Walls (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Road Paving Structures (AREA)

Claims (11)

  1. Verfahren zur Modifizierung einer Bewehrte-Erde-Anlage, wobei die Anlage umfasst:
    - eine Aufschüttung (1),
    - eine erste Verkleidung (3) mit einer Außenseite (8), welche die Stirnseite der Anlage definiert, und
    - wenigstens ein Stabilisierungselement (2), das mit der ersten Verkleidung verbunden ist und sich in einem verstärkten Bereich der Aufschüttung erstreckt, der hinter der Stirnseite der Anlage liegt,
    wobei das Verfahren zur Modifizierung die Schritte umfasst, bei welchen:
    - eine zweite Verkleidung (14) entlang der Außenseite der ersten Verkleidung (3) angeordnet wird,
    - das Stabilisierungselement (2) von der ersten Verkleidung (3) abgelöst wird,
    - das Stabilisierungselement mit der zweiten Verkleidung verbunden wird.
  2. Verfahren nach Anspruch 1, wobei die Ablösung des Stabilisierungselements von der ersten Verkleidung durch Öffnen ausgehend von der Außenseite der ersten Verkleidung durchgeführt wird, beispielsweise durch Sägen, Stoßen oder Bohren.
  3. Verfahren nach einem der Ansprüche 1 oder 2, weiterhin umfassend einen Schritt, bei dem an der Außenseite der ersten Verkleidung eine geotextile Dichtung bzw. ein geotextiles Verbindungsstück angebracht wird.
  4. Verfahren nach einem der vorhergehenden Ansprüche, weiterhin umfassend einen Schritt, bei dem zwischen der ersten und der zweiten Verkleidung ein kompressibles Material angeordnet wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche, weiterhin umfassend einen Schritt, bei dem das Stabilisierungselement unter mechanische Spannung gesetzt wird, nachdem das Stabilisierungselement von der ersten Verkleidung abgelöst wurde.
  6. Verfahren nach einem der Ansprüche 1 bis 4, weiterhin umfassend einen Schritt, bei dem ein System zur Aufrechterhaltung der mechanischen Spannung des Stabilisierungselements eingesetzt wird, bevor das Stabilisierungselement von der ersten Verkleidung abgelöst wird.
  7. Verfahren nach einem der vorhergehenden Ansprüche, wobei die zweite Verkleidung im Wesentlichen die gleiche Höhe aufweist wie die erste Verkleidung.
  8. Verfahren nach einem der vorhergehenden Ansprüche, wobei die zweite Verkleidung an der ersten Verkleidung angeordnet wird.
  9. Verfahren nach einem der Ansprüche 1 bis 7, wobei die zweite Verkleidung entlang der Außenseite der ersten Verkleidung so angeordnet wird, dass ein aufzuschüttendes Volumen (16) definiert wird, wobei das Verfahren weiterhin einen Schritt umfasst, bei dem Aufschüttungsmaterial in das Volumen (16) eingebracht wird.
  10. Verfahren nach einem der vorhergehenden Ansprüche, wobei die erste und die zweite Verkleidung jeweils eine erste und eine zweite Anordnung von vorgefertigten Elementen umfassen, wobei die vorgefertigten Elemente der ersten und der zweiten Anordnung im Wesentlichen identische Formen und Abmessungen aufweisen und die vorgefertigten Elemente der zweiten Anordnung gemäß einer Konfiguration angeordnet werden, die im Wesentlichen identisch zu derjenigen der vorgefertigten Elemente der ersten Anordnung ist.
  11. Verfahren nach einem der Ansprüche 1 bis 9, wobei die zweite Verkleidung ein Gitter umfasst, mit der das Stabilisierungselement verbunden wird, wobei das zweite Verkleidungselement anschließend durch Spritzbeton erhalten wird.
EP11815532.4A 2010-12-23 2011-12-22 Verfahren zur modifizierung einer stützwand mit bewehrter erde Active EP2655750B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1061210A FR2969673B1 (fr) 2010-12-23 2010-12-23 Procede de modification d'un ouvrage en sol renforce
PCT/FR2011/053166 WO2012085486A1 (fr) 2010-12-23 2011-12-22 Procédé de modification d'un ouvrage en sol renforcé

Publications (2)

Publication Number Publication Date
EP2655750A1 EP2655750A1 (de) 2013-10-30
EP2655750B1 true EP2655750B1 (de) 2014-07-30

Family

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Application Number Title Priority Date Filing Date
EP11815532.4A Active EP2655750B1 (de) 2010-12-23 2011-12-22 Verfahren zur modifizierung einer stützwand mit bewehrter erde

Country Status (12)

Country Link
US (1) US8845237B2 (de)
EP (1) EP2655750B1 (de)
JP (1) JP5932833B2 (de)
AU (1) AU2011346953B2 (de)
CA (1) CA2822414C (de)
ES (1) ES2516215T3 (de)
FR (1) FR2969673B1 (de)
IN (1) IN2013MN01194A (de)
MX (1) MX2013007239A (de)
MY (1) MY168679A (de)
WO (1) WO2012085486A1 (de)
ZA (1) ZA201304567B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1040472C2 (nl) * 2013-10-31 2015-05-04 Voets Gewapende Grondconstructies B V Werkwijze voor het vervaardigen van een gestabiliseerde grondconstructie met een of meer bekledingselementen en een gestabiliseerde grondconstructie met een of meer bekledingselementen, bekledingselement voor een gestabiliseerde grondconstructie, samenstel van een bekledingselement en een langgerekt element.
JP6002348B1 (ja) * 2016-06-02 2016-10-05 Ｊｆｅ商事テールワン株式会社 擁壁構造の補修方法

Family Cites Families (17)

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US4728225A (en) * 1985-02-11 1988-03-01 Schnabel Foundation Company Method of rehabilitating a waterfront bulkhead
DE3716100A1 (de) * 1987-05-14 1988-12-01 Ross Kurt G Verfahren zur sicherung von stuetzmauern
US4961673A (en) * 1987-11-30 1990-10-09 The Reinforced Earth Company Retaining wall construction and method for construction of such a retaining wall
US5368414A (en) * 1991-07-19 1994-11-29 Miller; Vincent G. Method and system for rehabilitating a bulkhead
JPH0641994A (ja) * 1991-08-21 1994-02-15 Oyo Kikaku:Kk 急勾配盛土の表面形成方法
US5350256A (en) * 1991-11-26 1994-09-27 Westblock Products, Inc. Interlocking retaining walls blocks and system
US5558470A (en) * 1992-10-09 1996-09-24 Jte, Inc. System and method for adjustably anchoring traffic barriers and wall facing panels to the soldier beams of a wall
US5551810A (en) * 1994-06-08 1996-09-03 Schnabel Foundation Company Retaining wall with an outer face and method of forming the same
US5669737A (en) * 1995-07-27 1997-09-23 Equilbec; Michel Wall retention system
JP2002339363A (ja) * 2001-05-17 2002-11-27 Kazuo Yasumoto 盛土補強構造
US6802675B2 (en) * 2002-05-31 2004-10-12 Reinforced Earth Company Two stage wall connector
FR2860529B1 (fr) * 2003-10-03 2006-12-15 France Gabion Ouvrage de genie civil, element individuel de construction et procede de renforcement d'un tel ouvrage
FR2860811A1 (fr) * 2003-10-13 2005-04-15 Freyssinet Int Stup Ouvrage en sol renforce et procede pour sa construction
US7850400B2 (en) * 2004-11-25 2010-12-14 Freyssinet International (Stup) Stabilized soil structure and facing elements for its construction
GB0514891D0 (en) 2005-07-20 2005-08-24 Pearsalls Ltd Improvements in and relating to implants
FR2913436B1 (fr) * 2007-03-05 2009-05-29 Terre Armee Internationale Soc Ouvrage en sol renforce et elements de renfort pour sa construction
US20090041552A1 (en) * 2007-08-10 2009-02-12 Westblock Systems, Inc. Retaining wall system

Also Published As

Publication number Publication date
AU2011346953A1 (en) 2013-07-11
JP2014503721A (ja) 2014-02-13
CA2822414A1 (fr) 2012-06-28
IN2013MN01194A (de) 2015-06-05
FR2969673B1 (fr) 2013-02-08
US20130294846A1 (en) 2013-11-07
US8845237B2 (en) 2014-09-30
CA2822414C (fr) 2019-02-12
JP5932833B2 (ja) 2016-06-08
ZA201304567B (en) 2014-09-25
MX2013007239A (es) 2013-08-15
ES2516215T3 (es) 2014-10-30
FR2969673A1 (fr) 2012-06-29
MY168679A (en) 2018-11-29
WO2012085486A1 (fr) 2012-06-28
AU2011346953B2 (en) 2017-02-02
EP2655750A1 (de) 2013-10-30

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