EP2655750A1 - Method for modifying a structure with a reinforced floor - Google Patents
Method for modifying a structure with a reinforced floorInfo
- Publication number
- EP2655750A1 EP2655750A1 EP11815532.4A EP11815532A EP2655750A1 EP 2655750 A1 EP2655750 A1 EP 2655750A1 EP 11815532 A EP11815532 A EP 11815532A EP 2655750 A1 EP2655750 A1 EP 2655750A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- facing
- elements
- stabilizing
- stabilizing element
- outer face
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000006641 stabilisation Effects 0.000 claims abstract description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 48
- 239000002689 soil Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 8
- 239000004746 geotextile Substances 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 238000009527 percussion Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000011378 shotcrete Substances 0.000 claims description 2
- 238000002715 modification method Methods 0.000 abstract 1
- 239000004567 concrete Substances 0.000 description 10
- 230000008961 swelling Effects 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000007170 pathology Effects 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
Classifications
-
- 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.
- 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. Although these structures in reinforced soil are very robust and powerful, it happens that in use, one realizes that it is necessary to make modifications of the structure.
- 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 embankment is stabilized by injection of a concrete at the rear of the facing element
- a new facing element is cast in place or the old facing element is replaced by a prefabricated element.
- the invention thus proposes a method of modifying a structure in reinforced soil, said structure comprising:
- a first facing comprising an outer face defining the front face of the structure
- the modification process comprising the steps in which:
- a second facing is arranged along the outer face of the first facing
- the stabilization element is connected to the second facing.
- 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.
- a method according to the invention may further comprise one or more of the following optional features considered individually or according to all possible combinations:
- the disconnection of the stabilizing element of the first facing is made by opening from the outer face of said first facing, for example by sawing, percussion or coring;
- the method further comprises a step where there is disposed on the outer face of the first facing a geotextile seal;
- the method further comprises a step where there is disposed between the first and second siding a compressible material
- the method further comprises a step of mechanically tensioning the stabilizing element after disconnecting the stabilizing element from the first facing;
- the method further comprises a step of setting up a system for maintaining the mechanical tension of the stabilizing element before disconnecting the stabilizing element from the first facing;
- the second facing is disposed against the first facing
- the second facing is disposed along the outer face of the first facing so as to define a volume to be backfilled, the method further comprising a step during which bringing backfill material into said volume;
- the second facing is disposed along the outer face of the first facing so as to define a volume to be backfilled, the method further comprising the steps in which:
- the first and second facings respectively comprise a first and a second set of prefabricated elements, the prefabricated elements of the first and second assemblies having substantially identical shapes and dimensions, and the prefabricated elements of the second set are arranged in a substantially identical arrangement to that prefabricated elements of the first facing; and or
- the second facing comprises a mesh to which the stabilizing element is connected, the second facing element being then obtained by shotcrete.
- the invention also relates to a reinforced soil structure modified by means of a method according to the invention.
- the invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings in which:
- FIG. 1 is a schematic side sectional view of a reinforced soil structure under construction
- FIGS. 2a to 2d illustrate the introduction of a second facing by means of a method according to a first embodiment of the invention
- FIGS. 3a to 3b illustrate the establishment of a second facing by means of a method according to a second embodiment of the invention
- Figure 4 is a schematic side sectional view of a reinforced soil structure obtained by means of a method according to a third embodiment of one invention.
- Figure 1 illustrates a retaining wall on reinforced soil.
- 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 strips spreading 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. 2a.
- the method according to the invention can for example 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 comprising a backfill 1, a first facing 3 comprising 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 into a reinforced area of the embankment 1 located at the rear of the front face of the work.
- 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 FR0312083 application.
- the method according to this first embodiment then comprises a step of setting up a second facing illustrated in 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 in FIG. 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 stabilizing element illustrated in FIG. 2d.
- a 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 are the elements of facing would have 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 into 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, preferably one of the first facing elements located at the base, is disconnected. of the work on reinforced soil.
- This disconnection can be achieved for example by opening from the outer face of the first facing element 4, for example by wake, 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 illustrated in FIG. 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 a metal lattice, to which the stabilizing elements 2 will be connected.
- the second facing element is then constituted by means of concrete spraying methods on the trellis to which the stabilizing elements 2 have been previously connected.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1061210A FR2969673B1 (en) | 2010-12-23 | 2010-12-23 | METHOD FOR MODIFYING A WORK IN REINFORCED SOIL |
PCT/FR2011/053166 WO2012085486A1 (en) | 2010-12-23 | 2011-12-22 | Method for modifying a structure with a reinforced floor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2655750A1 true EP2655750A1 (en) | 2013-10-30 |
EP2655750B1 EP2655750B1 (en) | 2014-07-30 |
Family
ID=43759978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11815532.4A Active EP2655750B1 (en) | 2010-12-23 | 2011-12-22 | Method of reshaping a reinforced soil structure |
Country Status (12)
Country | Link |
---|---|
US (1) | US8845237B2 (en) |
EP (1) | EP2655750B1 (en) |
JP (1) | JP5932833B2 (en) |
AU (1) | AU2011346953B2 (en) |
CA (1) | CA2822414C (en) |
ES (1) | ES2516215T3 (en) |
FR (1) | FR2969673B1 (en) |
IN (1) | IN2013MN01194A (en) |
MX (1) | MX2013007239A (en) |
MY (1) | MY168679A (en) |
WO (1) | WO2012085486A1 (en) |
ZA (1) | ZA201304567B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1040472C2 (en) * | 2013-10-31 | 2015-05-04 | Voets Gewapende Grondconstructies B V | METHOD FOR MANUFACTURING A STABILIZED GROUND CONSTRUCTION WITH ONE OR MORE COATING ELEMENTS AND A STABILIZED GROUND CONSTRUCTION WITH ONE OR MORE COATING ELEMENTS, COATING ELEMENT FOR A STABILIZED GROUND STRUCTURE, COMPOSITION OF A COMPOSITION OF A COMPOSITION OF A COMPOSITION |
JP6002348B1 (en) * | 2016-06-02 | 2016-10-05 | Jfe商事テールワン株式会社 | Retaining method of retaining wall structure |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4728225A (en) * | 1985-02-11 | 1988-03-01 | Schnabel Foundation Company | Method of rehabilitating a waterfront bulkhead |
DE3716100A1 (en) * | 1987-05-14 | 1988-12-01 | Ross Kurt G | METHOD FOR SECURING SUPPORT WALLS |
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 (en) * | 1991-08-21 | 1994-02-15 | Oyo Kikaku:Kk | Surface forming method of step gradient banking |
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 (en) * | 2001-05-17 | 2002-11-27 | Kazuo Yasumoto | Banking reinforcing structure |
US6802675B2 (en) * | 2002-05-31 | 2004-10-12 | Reinforced Earth Company | Two stage wall connector |
FR2860529B1 (en) * | 2003-10-03 | 2006-12-15 | France Gabion | CIVIL ENGINEERING WORK, INDIVIDUAL BUILDING ELEMENT AND METHOD FOR STRENGTHENING SUCH A WORK |
FR2860811A1 (en) * | 2003-10-13 | 2005-04-15 | Freyssinet Int Stup | REINFORCED GROUND WORK AND METHOD FOR ITS 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 (en) * | 2007-03-05 | 2009-05-29 | Terre Armee Internationale Soc | REINFORCED GROUND WORK AND REINFORCING ELEMENTS FOR ITS CONSTRUCTION |
US20090041552A1 (en) * | 2007-08-10 | 2009-02-12 | Westblock Systems, Inc. | Retaining wall system |
-
2010
- 2010-12-23 FR FR1061210A patent/FR2969673B1/en not_active Expired - Fee Related
-
2011
- 2011-12-22 CA CA2822414A patent/CA2822414C/en not_active Expired - Fee Related
- 2011-12-22 MX MX2013007239A patent/MX2013007239A/en active IP Right Grant
- 2011-12-22 US US13/997,184 patent/US8845237B2/en not_active Expired - Fee Related
- 2011-12-22 AU AU2011346953A patent/AU2011346953B2/en not_active Ceased
- 2011-12-22 ES ES11815532.4T patent/ES2516215T3/en active Active
- 2011-12-22 EP EP11815532.4A patent/EP2655750B1/en active Active
- 2011-12-22 MY MYPI2013002361A patent/MY168679A/en unknown
- 2011-12-22 JP JP2013545482A patent/JP5932833B2/en active Active
- 2011-12-22 WO PCT/FR2011/053166 patent/WO2012085486A1/en active Application Filing
-
2013
- 2013-06-20 IN IN1194MUN2013 patent/IN2013MN01194A/en unknown
- 2013-06-20 ZA ZA2013/04567A patent/ZA201304567B/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2012085486A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2655750B1 (en) | 2014-07-30 |
ZA201304567B (en) | 2014-09-25 |
FR2969673B1 (en) | 2013-02-08 |
US8845237B2 (en) | 2014-09-30 |
FR2969673A1 (en) | 2012-06-29 |
JP2014503721A (en) | 2014-02-13 |
JP5932833B2 (en) | 2016-06-08 |
WO2012085486A1 (en) | 2012-06-28 |
ES2516215T3 (en) | 2014-10-30 |
CA2822414C (en) | 2019-02-12 |
AU2011346953B2 (en) | 2017-02-02 |
MY168679A (en) | 2018-11-29 |
MX2013007239A (en) | 2013-08-15 |
AU2011346953A1 (en) | 2013-07-11 |
US20130294846A1 (en) | 2013-11-07 |
IN2013MN01194A (en) | 2015-06-05 |
CA2822414A1 (en) | 2012-06-28 |
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