EP0351229A2 - Renforcement des sols - Google Patents

Renforcement des sols Download PDF

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Publication number
EP0351229A2
EP0351229A2 EP89307151A EP89307151A EP0351229A2 EP 0351229 A2 EP0351229 A2 EP 0351229A2 EP 89307151 A EP89307151 A EP 89307151A EP 89307151 A EP89307151 A EP 89307151A EP 0351229 A2 EP0351229 A2 EP 0351229A2
Authority
EP
European Patent Office
Prior art keywords
soil
reinforcement
elements
spirals
laid
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Withdrawn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
EP89307151A
Other languages
German (de)
English (en)
Other versions
EP0351229A3 (fr
Inventor
Ernest Kemp
Frank George Jones
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.)
Helix Reinforcements Ltd
Original Assignee
Helix Reinforcements Ltd
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 Helix Reinforcements Ltd filed Critical Helix Reinforcements Ltd
Publication of EP0351229A2 publication Critical patent/EP0351229A2/fr
Publication of EP0351229A3 publication Critical patent/EP0351229A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil

Definitions

  • This inventions relates to earth and soil reinforcement (conveniently referred to as soil hereafter).
  • the engineering properties of soil may be improved in certain conditions by the introduction of reinforcement elements.
  • top down The construction technique employed in soil nailing is generally referred to as "top down", Grouting techniques are usually employed to bond the reinforcements to the surrounding soil and hence transfer the shear force to the soil.
  • a method of soil reinforcement which includes the use of reinforcement elements in which the reinforcement elements are in the form of spirals.
  • the spirals may be continuous, whilst in an alternative form the spirals may be intermittent (ie. interspersed with portions of other shapes).
  • the elements are formed of stainless steel.
  • the spirals of the elements are of substantially flattened section, ie, that which would be obtained by twisting a flat strip of metal into a spiral.
  • the reinforcement elements may be laid between layers of soil and/or aggregates which are laid horizontally, sub-­horizontally, vertically or sub-vertically. They may be laid singly, singly spaced apart, or in groups.
  • a reinforcing element 10 is of flattened section twisted into a spiral as can be seen from the cross-section in Figure 1A.
  • 'D' indicates the diameter
  • 'P' indicates the pitch
  • 't' indicates the thickness.
  • the D and P parameters are important in relation to the category and soil specifications ie, whether it is granular, clay or the like, along with particle size and shape.
  • the thickness t will basically control the strip strength together with the diameter D.
  • Figure 2 shows an arrangement in which a second strip indicated generally at 11 has a spiral portion 12 a flat portion 13 and a second spiral portion 14 and a second flat portion 15.
  • the length of the spiral portion 12 is indicated by A, that of the flat portion 14 by B, and that of the spiral portion 14 by C.
  • the respective lengths of the portions are indicated by a, b & c.
  • the ratios a/b, b/c or a/c are determined by the soil structure and application.
  • the portions 13 and 15 are conveniently made from an untwisted portion of the spiral.
  • Either of the arrangements shown in Figures 1 and 2 may be made from any suitable material compatible with the soil structure and working environment. If longevity is aonsideration they are preferably made of stainless steel.
  • a strip 16 has secured to one end thereof an anchor 17.
  • the anchor preferably incorporate means to secure the end of the strip either by bonding or welding, and may be of any suitable shape.
  • the density and reinforcement configuration will be a function of the soil structure, grading and structural function.
  • the reinforcements may be laid between layers of soil and/or aggregates and may be laid horizontally, sub-­horizontally, vertically or sub-vertically according to the requirements of the site.
  • One or more layers of the reinforcements may be used and may for example be spaced from one another according to the requirements of the site. They may lie parallel to the slope, and normal to the reinforcing wall or although other angles may be used if required. They may be laid singly, pairs or more, laid close to one another, or in any suitable configuration known in the art.
  • the reinforcing elements according to the present invention are particularly useful in increasing and improving soil reinforcement because of their shape and strength. Furthermore when they are made of stainless steel there is no tendency to corrode in normal environmental conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
EP89307151A 1988-07-15 1989-07-14 Renforcement des sols Withdrawn EP0351229A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8816849 1988-07-15
GB888816849A GB8816849D0 (en) 1988-07-15 1988-07-15 Improvements relating to earth reinforcement

Publications (2)

Publication Number Publication Date
EP0351229A2 true EP0351229A2 (fr) 1990-01-17
EP0351229A3 EP0351229A3 (fr) 1990-04-04

Family

ID=10640493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89307151A Withdrawn EP0351229A3 (fr) 1988-07-15 1989-07-14 Renforcement des sols

Country Status (2)

Country Link
EP (1) EP0351229A3 (fr)
GB (2) GB8816849D0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707117A1 (fr) * 1993-03-31 1996-04-17 The Reinforced Earth Company Construction de murs soutènement en blocs modulaires et blocs pour cette construction
US5642968A (en) * 1993-03-31 1997-07-01 Societe Civile Des Brevets Henri C. Vidal Modular block retaining wall construction and components
US5807030A (en) * 1993-03-31 1998-09-15 The Reinforced Earth Company Stabilizing elements for mechanically stabilized earthen structure
WO2023073394A1 (fr) * 2021-10-29 2023-05-04 Soletanche Freyssinet Élément de renforcement pour une structure de sol stabilisée, et structure de sol stabilisée comprenant un tel élément de renforcement

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1285928A (en) * 1968-10-24 1972-08-16 Wolf Chitis A method of strengthening a sloping embankment
US3724145A (en) * 1971-04-05 1973-04-03 D Daniel Apparatus for anchoring a structure to earth matter
FR2202549A5 (fr) * 1972-10-09 1974-05-03 Goldenberg Sa
FR2212469B1 (fr) * 1972-12-28 1978-03-03 Gescoriac
FR2325778A1 (fr) * 1975-09-26 1977-04-22 Vidal Henri Armature pour ouvrage en terre armee
DE2631745A1 (de) * 1976-07-15 1978-01-26 Bauer Spezialtiefbau Verfahren zur bodenvernagelung
GB2014221B (en) * 1977-11-15 1982-04-15 Transport Secretary Of State F Stabilising elements for earth strucutres
JPS5854211B2 (ja) * 1979-10-31 1983-12-03 日本サミコン株式会社 ねじり貫入式ｐｃらせん杭
NL8102327A (nl) * 1981-05-12 1982-12-01 Fundamentum Bv Werkwijze voor het vervaardigen van een fundatiepaal alsmede een daarbij toe te passen buis.
DE3624943A1 (de) * 1986-07-23 1988-01-28 Delmag Maschinenfabrik Vorgefertigtes betonteil sowie verfahren zum einbringen eines solchen in das erdreich
GB8726483D0 (en) * 1987-11-12 1987-12-16 Bicc Plc Soil stabilisation
FR2628771B1 (fr) * 1988-03-18 1992-06-12 Inst Textile De France Materiau tridimensionnel pour le renforcement des sols

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707117A1 (fr) * 1993-03-31 1996-04-17 The Reinforced Earth Company Construction de murs soutènement en blocs modulaires et blocs pour cette construction
US5642968A (en) * 1993-03-31 1997-07-01 Societe Civile Des Brevets Henri C. Vidal Modular block retaining wall construction and components
US5807030A (en) * 1993-03-31 1998-09-15 The Reinforced Earth Company Stabilizing elements for mechanically stabilized earthen structure
WO2023073394A1 (fr) * 2021-10-29 2023-05-04 Soletanche Freyssinet Élément de renforcement pour une structure de sol stabilisée, et structure de sol stabilisée comprenant un tel élément de renforcement

Also Published As

Publication number Publication date
EP0351229A3 (fr) 1990-04-04
GB8816849D0 (en) 1988-08-17
GB8916136D0 (en) 1989-08-31
GB2220689A (en) 1990-01-17

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