EP1105582A1 - Systeme de c consolidation du sol et son treillis de renforcement - Google Patents

Systeme de c consolidation du sol et son treillis de renforcement

Info

Publication number
EP1105582A1
EP1105582A1 EP99936906A EP99936906A EP1105582A1 EP 1105582 A1 EP1105582 A1 EP 1105582A1 EP 99936906 A EP99936906 A EP 99936906A EP 99936906 A EP99936906 A EP 99936906A EP 1105582 A1 EP1105582 A1 EP 1105582A1
Authority
EP
European Patent Office
Prior art keywords
mesh
bars
wires
unit according
mesh unit
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.)
Withdrawn
Application number
EP99936906A
Other languages
German (de)
English (en)
Inventor
Nicolas Goulesco
Rapha[L Lu
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.)
VSL France
Original Assignee
VSL France
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by VSL France filed Critical VSL France
Publication of EP1105582A1 publication Critical patent/EP1105582A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/04—Mats

Definitions

  • the invention relates to a metal mesh unit to be embedded in a natural or artificial soil formation, e.g. a mass of earth, sand, or any other natural synthetic material, possibly under water, to be held therein essentially by abutment effects.
  • a natural or artificial soil formation e.g. a mass of earth, sand, or any other natural synthetic material, possibly under water, to be held therein essentially by abutment effects.
  • the mesh serves as reinforcing means for the soil formation and as anchor for soil retaining elements disposed in front of the formation.
  • Mesh units are made of bars or wires that are crossed and welded together at their cross-points so as to make a mesh. Until now, it has been common practice to use mesh units originally designed for other applications, specifically grids as used for reinforcing concrete structures.
  • the wires or bars of the mesh unit are welded together without using a filler metal (in order to avoid galvanic effects), so that the welds can withstand shear equal to 30% of the value which would break a wire of the mesh in tension.
  • the wires or bars of the mesh need to be welded together with a degree of penetration of a wire or bar in another ire or bar at a cross-point that is such that the resistance of the mesh to corrosion is substantially uniform over time, i.e. that the rate at which wire or bar material in the mesh is consumed by the effects of corrosion is substantially the same at the location of a weld as at any other location of the mesh.
  • the depth of penetration of a wire or bar in another wire or bar should be 8% to 30% of the sum of the diameters of the two wires or bars, and preferably 8% to 16% of said sum.
  • the wires or bars of the mesh are generally of circular right section, however it is not impossible, for some special reason, to use wires or bars having a section of some other shape, in which case the term "diameter" as applied to a wire or a bar designates the diameter of a circular section having an area that is equal to the right sectional area of the wire or bar.
  • the mesh is made up of parallel longitudinal wires or bars that are preferably uniformly spaced apart, and preferably of the same length, together with parallel transverse wires or bars that are preferably uniformly spaced apart and preferably of the same length, extending perpendicularly to the longitudinal wires or bars that they interconnect, and that are preferably of the same diameter.
  • smooth wires or bars of steel having a high elastic limit are used, with a diameter of not less than 8 mm.
  • the mesh generally comprises two to six longitudinal wires or bars that are spaced apart by 30 cm, for example.
  • Figure 1 is a diagram of a mesh used for reinforcing a soil and for retaining a front plate of the soil (M) ;
  • Figures 2 to 11 show ways in which a cross-shaped weld can be made between two meshes bars by electric welding, with a degree of penetration of one bar in the other that increases from one figure to the next, from a degree of 0% ( Figure 2) up to a degree of 100% ( Figure 11) ;
  • Figure 12 is a graph in which the curves plot values that are a function of the degree of penetration.
  • Figure 1 there is shown diagrammatically a mesh that is made up of crossed bars (1, 2) which hold a plate (P) on the front of a soil formation (M) .
  • the figure does not show means for securing the mesh to the plate, such means not being characteristic of the invention and being capable of being constituted in any conventional manner.
  • a plate is merely one example of an element that can be held on the front of a soil formation to retain the formation, where such elements can be selected from the group constituted by rigid plates, flexible films, sheets, nets, etc In each of Figures 2 to 10, there are shown in perspective:
  • the area of the shape (7) is the area referred to above as the area of the projection of the outline of the indentation of a wire or bar in the other wire or bar at the cross-point between the two wires or bars.
  • Figure 12 plots curves showing how the values of A (square points), of (P) (lozenge-shaped points), and of (C) (triangular points) , as taken from the above table, vary as a function of the degrees of penetration 1 to 10 which are plotted along the abscissa. For bars having a diameter of 10 mm, penetrations of 8%, 16%, 25%, and 30% correspond respectively to abscissa values (1, 6), (3, 2), (5) and (6).
  • a degree of penetration of 16% corresponds to an area (A) close to the area of the right section of a bar, which area is 78 mm 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne un ensemble de treillis de consolidation destiné à être noyé dans un sol. Le treillis se compose de fils ou de barres métalliques entrecroisés (1, 2) qui sont soudés les uns aux autres à leurs points d'intersection sans métal d'apport. Ce treillis se caractérise en ce que le degré de pénétration les uns dans les autres des fils et des barres à leurs points d'intersection est tel que ledit treillis offre dans le temps une résistance uniforme à la corrosion. Cette invention convient particulièrement pour les système de rétention de sols.
EP99936906A 1998-08-05 1999-08-03 Systeme de c consolidation du sol et son treillis de renforcement Withdrawn EP1105582A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9810061A FR2782100B1 (fr) 1998-08-05 1998-08-05 Treillis destine a etre maintenu par butee dans un massif et son application a un massif de terre
FR9810061 1998-08-05
PCT/IB1999/001440 WO2000008266A1 (fr) 1998-08-05 1999-08-03 Systeme de c consolidation du sol et son treillis de renforcement

Publications (1)

Publication Number Publication Date
EP1105582A1 true EP1105582A1 (fr) 2001-06-13

Family

ID=9529422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99936906A Withdrawn EP1105582A1 (fr) 1998-08-05 1999-08-03 Systeme de c consolidation du sol et son treillis de renforcement

Country Status (6)

Country Link
EP (1) EP1105582A1 (fr)
AU (1) AU5187599A (fr)
FR (1) FR2782100B1 (fr)
IL (1) IL141246A0 (fr)
TW (1) TW473579B (fr)
WO (1) WO2000008266A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102262786B1 (ko) 2021-02-09 2021-06-08 이대영 철선망이 내장된 콘크리트 구조물

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1709339A1 (de) * 1962-12-01 1972-08-03 Ferrotest Gmbh Gitterartiges vorgefertigtes Bewehrungselement fuer Stahlbetonbauteile
FR1437626A (fr) * 1965-03-25 1966-05-06 Elément de renforcement à ancrage pour armature de béton armé
US4324508A (en) * 1980-01-09 1982-04-13 Hilfiker Pipe Co. Retaining and reinforcement system method and apparatus for earthen formations

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0008266A1 *

Also Published As

Publication number Publication date
AU5187599A (en) 2000-02-28
WO2000008266A1 (fr) 2000-02-17
IL141246A0 (en) 2002-03-10
FR2782100A1 (fr) 2000-02-11
TW473579B (en) 2002-01-21
FR2782100B1 (fr) 2000-11-03

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