EP0897035A1 - Géosynthétique pour dispositif de renforcement de sols à risques d'effondrement - Google Patents
Géosynthétique pour dispositif de renforcement de sols à risques d'effondrement Download PDFInfo
- Publication number
- EP0897035A1 EP0897035A1 EP98402015A EP98402015A EP0897035A1 EP 0897035 A1 EP0897035 A1 EP 0897035A1 EP 98402015 A EP98402015 A EP 98402015A EP 98402015 A EP98402015 A EP 98402015A EP 0897035 A1 EP0897035 A1 EP 0897035A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strands
- geosynthetic
- group
- elongation
- fiber
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/004—Sealing liners
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B21/10—Open-work fabrics
- D04B21/12—Open-work fabrics characterised by thread material
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
-
- 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
- E02D17/20—Securing of slopes or inclines
-
- 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
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2403/00—Details of fabric structure established in the fabric forming process
- D10B2403/02—Cross-sectional features
- D10B2403/024—Fabric incorporating additional compounds
- D10B2403/0241—Fabric incorporating additional compounds enhancing mechanical properties
- D10B2403/02412—Fabric incorporating additional compounds enhancing mechanical properties including several arrays of unbent yarn, e.g. multiaxial fabrics
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/20—Industrial for civil engineering, e.g. geotextiles
- D10B2505/204—Geotextiles
Definitions
- the invention relates to a geosynthetic for reinforcement earthworks.
- Geosynthetics and more particularly geotextiles are more and more frequently used as reinforcements in the construction of earthworks, for roadways or railway.
- Some geotechnical difficulties can be relatively identified and be subject to appropriate and final treatment. Other geotechnical difficulties are more complex to identify and sometimes lead the engineer to manage a risk.
- the aim of the invention is to propose a geosynthetic which allows normal operation during use of the structure and which provides a parachute type safety solution in ground collapse.
- the invention therefore relates to a geosynthetic which comprises at least minus one layer of parallel reinforcing strands.
- This geosynthetic is characterized by the fact that the strands of reinforcement are divided into a first group of strands made with a fiber with a high tensile modulus and a value of elongation at break close to 5%, and in a second group of strands made with a fiber having a tensile modulus lower than fiber traction module of the first group of strands, and a breaking elongation value at least equal to 12%.
- the fiber of the strands of the first group is made of PVA (polyvinyl acetate) which has an elongation at the rupture of around 5%. It should be noted that other fibers may be used, such as glass or aramid, which have value 2 or 2.5% maximum elongation at break, which is too little high for font areas.
- PVA polyvinyl acetate
- the fibers of the strands of the second group are preferably made of polyester or polypropylene.
- the geosynthetic according to the invention may advantageously be associated, during the construction of the structure with a second geosynthetic equipped with wires that can break at predetermined elongation values, for example, 4 and 8% and connected to warning devices, this second geosynthetic being arranged on the ground and separated from the geosynthetic according to the invention by a layer of soil which, under its own weight, causes a distortion of the second geosynthetic by 5%, for example, which causes one of the warning devices to activate.
- the slope of the curve (C) is high.
- the reinforcing strands having the high tensile modulus and a breaking elongation value of 5% which are made of preferably in PVA (polyvinyl acetate), as well as by the other strands reinforcement that have a significantly lower tensile modulus and a value of elongation at break greater than 12%, and preferably equal to 18%, these other strands being made, for example, polyester or polypropylene.
- the OA portion of curve C corresponds to an operation normal geosynthetic in a work.
- the AB portion corresponds to an alert situation, and the BD portion corresponds to the use of geosynthetics in parachute mode in case land collapse under a structure equipped with geosynthetics according to the invention, for example.
- Figures 2 and 3 show a geosynthetic 10, produced in knitted woven technology, with a combination of nonwoven which comprises, in its transverse direction, a plurality of strands or cables 11, 12 parallel, distributed in a first group of strands 11 made of PVA fiber and a second group of strands 12 made polyester or polypropylene fibers.
- the strands 11 and 12 are integrated, during the manufacture of the geosynthetic 10, with a perfectly rectilinear arrangement which does not cause any ripple or shearing effect as in other textile surfaces.
- the strands 11 in PVA and the strands 12 in polyester or polypropylene are arranged alternately. It is obvious that the density of the two types of strands may be different and calculated according to the use of geosynthetics 10.
- Figures 4 and 5 show an advantageous use of the geosynthetic 10 in a civil engineering structure 20 arranged on a ground 21 comprising internal cavities 22 separated from the surface 23 of the ground 21 by arches 24.
- a first geosynthetic 25 which includes wires capable of break when the elongation coefficient of the first geosynthetic 25 is 4%, for example, in order to signal a first alert level, and wires likely to break when the coefficient of elongation of the first geosynthetic is 8%, by example, to provide a second level of alert.
- the weight of layer H causes the wires to break with a low fracture elongation coefficient, and the provision of a first alert level.
- the geosynthetic 10 supports only the weight of the work 20. Beyond a certain deformation of geosynthetic 10 (5 to 6%), it will transmit additional efforts to the first geosynthetic 25 which can lead to the breaking of wires with a breaking elongation coefficient high of the first geosynthetic 25, and the provision of the second alert level. This second level of alert will be reached for a deformation of geosynthetic 10 of the order of 6 or 7%, which is significantly lower than the breaking strain level of the strands in geosynthetic polyester 10.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Textile Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Laminated Bodies (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Woven Fabrics (AREA)
- Road Paving Structures (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Ropes Or Cables (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Prostheses (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
Description
Claims (4)
- Géosynthétique du type comportant au moins une nappe de brins de renforcement parallèles,
caractérisé par le fait que lesdits brins de renforcement sont répartis en un premier groupe de brins réalisés avec une fibre ayant un module de traction élevé et une valeur d'allongement de rupture voisine de 5%, et en un deuxième groupe de brins réalisés avec une fibre ayant un module de traction inférieur au module de traction de la fibre du premier groupe de brins, et une valeur d'allongement de rupture au moins égale à 12%. - Géosynthétique selon la revendication 1, caractérisé par le fait que la fibre des brins du premier groupe est en polyvinyle acétate.
- Géosynthétique selon l'une quelconque des revendications 1 ou 2, caractérisé par le fait que la fibre des brins du deuxième groupe est en polyester ou en polypropylène.
- Géosynthétique selon l'une quelconque des revendications 1 à 3, caractérisé par le fait qu'il est réalisé en tissé tricoté avec association de non-tissé.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9830900T SI0897035T1 (sl) | 1997-08-13 | 1998-08-07 | Geosintetik za napravo za ojačanje zemlje s tveganjem za posedanje |
CY20081100094T CY1107155T1 (el) | 1997-08-13 | 2008-01-28 | Γεωσυνθετικο υλικο για διαταξη ενισχυσεως εδαφων με κινδυνους κατακρημνισεως |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9710323A FR2767344B1 (fr) | 1997-08-13 | 1997-08-13 | Geosynthetique pour dispositif de renforcement de sols a risques d'effondrement |
FR9710323 | 1997-08-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0897035A1 true EP0897035A1 (fr) | 1999-02-17 |
EP0897035B1 EP0897035B1 (fr) | 2007-11-14 |
Family
ID=9510271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98402015A Expired - Lifetime EP0897035B1 (fr) | 1997-08-13 | 1998-08-07 | Géosynthétique pour dispositif de renforcement de sols à risques d'effondrement |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0897035B1 (fr) |
AT (1) | ATE378475T1 (fr) |
CY (1) | CY1107155T1 (fr) |
DE (2) | DE69838697T2 (fr) |
DK (1) | DK0897035T3 (fr) |
ES (1) | ES2297876T3 (fr) |
FR (1) | FR2767344B1 (fr) |
MY (1) | MY129898A (fr) |
PT (1) | PT897035E (fr) |
SG (1) | SG71141A1 (fr) |
SI (1) | SI0897035T1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2907132A1 (fr) * | 2006-10-17 | 2008-04-18 | Mdb Texinov Sa Soc Par Actions | Geotextile composite pour le genie civil et son procede de fabrication |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2932820B1 (fr) * | 2008-06-23 | 2012-11-16 | Mdb Texinov Sa | Nappe et grille de renfort avec introduction de fibres minerales pour les ouvrages de genie civil. |
FR3029943B1 (fr) | 2014-12-11 | 2016-12-30 | Texinov | Geosynthetique de renforcement de sol a comportement multi-module |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3823748A (en) * | 1972-02-14 | 1974-07-16 | Celanese Corp | Energy absorbent textile structure |
US4540311A (en) * | 1981-02-26 | 1985-09-10 | Burlington Industries, Inc. | Geotextile fabric construction |
EP0259165A2 (fr) * | 1986-09-05 | 1988-03-09 | Leucadia Inc | Natte de drainage en sous-sol |
US4837387A (en) * | 1986-02-21 | 1989-06-06 | Akzo N.V. | Supporting fabric for bearing bulk material |
EP0725187A1 (fr) * | 1995-02-06 | 1996-08-07 | Colas S.A. | Membrane bitumineuse à usage géotechnique et son procédé de fabrication |
WO1997009476A2 (fr) * | 1995-08-28 | 1997-03-13 | The Tensar Corporation | Textiles structuraux tricotes composites agglomeres |
-
1997
- 1997-08-13 FR FR9710323A patent/FR2767344B1/fr not_active Expired - Fee Related
-
1998
- 1998-08-07 ES ES98402015T patent/ES2297876T3/es not_active Expired - Lifetime
- 1998-08-07 DK DK98402015T patent/DK0897035T3/da active
- 1998-08-07 DE DE69838697T patent/DE69838697T2/de not_active Expired - Lifetime
- 1998-08-07 SI SI9830900T patent/SI0897035T1/sl unknown
- 1998-08-07 PT PT98402015T patent/PT897035E/pt unknown
- 1998-08-07 EP EP98402015A patent/EP0897035B1/fr not_active Expired - Lifetime
- 1998-08-07 AT AT98402015T patent/ATE378475T1/de active
- 1998-08-07 DE DE29825236U patent/DE29825236U1/de not_active Expired - Lifetime
- 1998-08-12 SG SG1998002975A patent/SG71141A1/en unknown
- 1998-08-12 MY MYPI98003675A patent/MY129898A/en unknown
-
2008
- 2008-01-28 CY CY20081100094T patent/CY1107155T1/el unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3823748A (en) * | 1972-02-14 | 1974-07-16 | Celanese Corp | Energy absorbent textile structure |
US4540311A (en) * | 1981-02-26 | 1985-09-10 | Burlington Industries, Inc. | Geotextile fabric construction |
US4837387A (en) * | 1986-02-21 | 1989-06-06 | Akzo N.V. | Supporting fabric for bearing bulk material |
EP0259165A2 (fr) * | 1986-09-05 | 1988-03-09 | Leucadia Inc | Natte de drainage en sous-sol |
EP0725187A1 (fr) * | 1995-02-06 | 1996-08-07 | Colas S.A. | Membrane bitumineuse à usage géotechnique et son procédé de fabrication |
WO1997009476A2 (fr) * | 1995-08-28 | 1997-03-13 | The Tensar Corporation | Textiles structuraux tricotes composites agglomeres |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2907132A1 (fr) * | 2006-10-17 | 2008-04-18 | Mdb Texinov Sa Soc Par Actions | Geotextile composite pour le genie civil et son procede de fabrication |
WO2008047030A1 (fr) * | 2006-10-17 | 2008-04-24 | Mdb Texinov Sa | Géotextile composite pour le génie civil et son procédé de fabrication |
Also Published As
Publication number | Publication date |
---|---|
ES2297876T3 (es) | 2008-05-01 |
DE69838697D1 (de) | 2007-12-27 |
DK0897035T3 (da) | 2008-03-03 |
PT897035E (pt) | 2008-02-04 |
SG71141A1 (en) | 2000-03-21 |
SI0897035T1 (sl) | 2008-06-30 |
MY129898A (en) | 2007-05-30 |
EP0897035B1 (fr) | 2007-11-14 |
DE29825236U1 (de) | 2006-12-21 |
CY1107155T1 (el) | 2012-10-24 |
ATE378475T1 (de) | 2007-11-15 |
FR2767344A1 (fr) | 1999-02-19 |
FR2767344B1 (fr) | 1999-11-05 |
DE69838697T2 (de) | 2008-10-30 |
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