EP0350454B1 - Procédé pour former un organe de traction ancrable dans le sol - Google Patents

Procédé pour former un organe de traction ancrable dans le sol Download PDF

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Publication number
EP0350454B1
EP0350454B1 EP89810506A EP89810506A EP0350454B1 EP 0350454 B1 EP0350454 B1 EP 0350454B1 EP 89810506 A EP89810506 A EP 89810506A EP 89810506 A EP89810506 A EP 89810506A EP 0350454 B1 EP0350454 B1 EP 0350454B1
Authority
EP
European Patent Office
Prior art keywords
tension member
point
central
tension
rear end
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.)
Expired - Lifetime
Application number
EP89810506A
Other languages
German (de)
English (en)
Other versions
EP0350454A2 (fr
EP0350454A3 (en
Inventor
Kurt Lüthi
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 International Ltd
Original Assignee
VSL International 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 VSL International Ltd filed Critical VSL International Ltd
Priority to AT89810506T priority Critical patent/ATE89882T1/de
Publication of EP0350454A2 publication Critical patent/EP0350454A2/fr
Publication of EP0350454A3 publication Critical patent/EP0350454A3/de
Application granted granted Critical
Publication of EP0350454B1 publication Critical patent/EP0350454B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
    • E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable

Definitions

  • the invention relates to a method according to the preamble of patent claim 1 and a traction element according to the preamble of patent claim 3.
  • excavation pits are often enclosed by slotted or sheet piling and anchored to the rear using tension anchors with tension elements.
  • the traction elements are temporarily anchored to the ground anchors.
  • the traction elements can also be used in the buildings themselves, e.g. when supporting a bridge. There forces can act on the supports during the construction of the bridge, which requires a temporary reinforcement of them by tension members.
  • the traction elements are removed from the ground or the building and can be used again if necessary.
  • the principle of a predetermined breaking point on the tension member is used.
  • the predetermined breaking point reduces the cross-section of the tension member. This method is mostly limited to rod-shaped steel tension members with a single tension rod. The tension member is torn off in the predetermined breaking point by stretching beyond the tensile strength limit and largely removed from the ground or the structure.
  • DE-PS 26 27 524 describes a grout anchor with a tension member surrounded by a cladding tube.
  • the pulling element designed in the form of a steel wire strand slidably extends through the cladding tube.
  • the traction element is guided with its end on the ground side through an anchor foot and held by means of a sleeve which is supported against the anchor foot.
  • An adhesive is arranged as an intermediate layer between the sleeve and the tension member and the tension member is pressed through the sleeve.
  • the clamping force of the sleeve is dimensioned such that the maximum resistance that is required to pull out the pulling element is somewhat greater than the load-bearing capacity that is exerted on the pulling element.
  • the European patent application published under number 244 353 describes a tension member that can be anchored and expanded in the ground or in a building.
  • This tension member consists of a central link and several outer links surrounding it.
  • the central member is completely severed at one point and a support element is pressed around the traction element via this separation point. By moving the separation point within the support element, the working load to be exerted on the pulling element can be adapted to the requirements.
  • This traction element with a central member severed within the support element is very suitable if no great demands have to be made on a certain elasticity of the traction element.
  • the tension member according to the invention is defined by the characterizing features of claim 3.
  • the tension member 1 consists of a steel wire strand. Of the outer links 3 arranged around a central link 2, one 3 'is completely severed at a first point 4. For this purpose, the stranded outer members 3 consisting of wires are partially opened and the outer member 3 ′ in question is completely sawn through.
  • a tubular support element 5 is pushed over the rear end region 1a of the traction element 1, which is later to be anchored in the ground, until the separation point 4 is just in front of the support element 5 or only therefrom is just covered.
  • the central member 2 is then also severed at a point 19 on the other side of the support element. In any case, this second separation point 19 lies outside the support element on the side of the support element 5 which faces the rear end of the traction element 1 which is to be anchored in the ground
  • Tension member 1 is pressed firmly.
  • An insert 11 is located between the inner surface of the tubular support element 5 and the tension element 1.
  • the insert 11 is made of a material that is harder than the support element 5 and the tension element 1.
  • the surface of the insert resting on the outer members 3 of the tension element 1 11 is provided with a toothing 13 for securely holding the tension member 1.
  • the length L of the support element 5 corresponds approximately to four to six times the diameter of the tension element 1 and the distance L 1 of the separation point 4 relative to the end of the support element 5 facing away from the rear end of the tension element 1 is approximately one twentieth of the length in the exemplary embodiment according to FIG. 1 L of the support element 5.
  • the separation point 4 can, however, be in a range of 1/2 L before to after the end of the support element 5 mentioned.
  • a cement emulsion is later injected into the soil surrounding the traction element 1.
  • a surrounding soil which is above and to the right of the support element 5 in relation to FIG. 1, a grout is formed by a grout, not shown.
  • FIGS. 1 and 2 shows the pulling element 1 shown in FIGS. 1 and 2, most of which is held by the support element held in the pressing body, not shown 5 has been separated by exerting a load P on the free end of the tension member 1.
  • the traction element 1 shown in FIG. 4 has a central steel rod 10 and six outer central rods 9, of which the steel rods 9 'are completely severed at the first points 4 and 6, respectively. So that the steel rods 9 and 10 are arranged and run parallel to one another, they are held together at regular intervals by clamping sleeves 7, of which only one is visible in FIG. 4. The rear part 1a of the tension member 1 is pressed together by the tubular support element 5 and held.
  • the first separation points 4 and 6 are located in relation to FIG. 4 on the left side of the support element 5, ie at a distance of about a quarter of the length of the support element 5 in front of the same.
  • the arrangement of the second separation point 20 corresponds to that in FIG. 1.
  • FIG. 5 shows that section of the traction element 1 which is separated from the anchored part 1a by the action of a greater load than the working load, the four outer steel rods 9, only two of which are visible, being broken by the greater load. Similar to the example shown in FIG. 3, the section of the central steel rod 10 originally located in part 1a was pulled out of part 1a.
  • FIGS. 1 and 2 show a further embodiment of the tension element 1 according to the invention, which, as in the example shown in FIGS. 1 and 2, is a steel wire strand with the central member 2 and the outer members 3.
  • the support element 5 'surrounding the part 1a of the tension member 1 to be anchored has a bore 12 which widens towards the rear in relation to FIG. 6 and in which two wedges 14 and 15 have internal teeth 16 for holding part 1a of the tension member 1 are arranged.
  • the separation point 4 of the outer member 3 ' is set back from its front end by about a seventh the length of the support element 5'.
  • the active part of the pulling element shown in FIG. 6 is surrounded by a cladding tube 17 and the space between the pulling element 1 and the inside of the cladding tube 17 is to facilitate both the pretensioning and the expansion of the active part of the pulling element 1 with a lubricant 18 filled out.
  • a cladding tube 17 can also be provided in the embodiments shown in FIGS. 1 and 4.
  • the support elements 5 with the associated separation points 4 are arranged at one point of the active part of the tension member 1.
  • Such embodiments have an extended passive part, ie part to be anchored. By applying load, all the non-severed outer members of such a tension member break in the area of the support element 5, so that the tension member can largely be removed from the ground.

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)
  • Piles And Underground Anchors (AREA)
  • Tents Or Canopies (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Harvesting Machines For Specific Crops (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Control And Safety Of Cranes (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Claims (6)

  1. Procédé pour la réalisation d'un organe de tension (1) ancrable ou sollicitable dans le sous-sol comportant un élément central (2; 10), autour duquel sont disposés des éléments extérieurs (3; 9), lequel organe de tension, qui présente une extrémité arrière ancrée dans le sous-sol est destiné après son usage en grande partie à être enlevé du sous-sol, un des éléments (3; 9) de l'organe de tension (1) devant au minimum être intégralement séparé sur un premier point (4) et l'élément central (2; 10) intégralement séparé sur un second point (19;20), qui est plus près de l'extrémité arrière de l'organe de tension que le premier point (4); un élément d'appui (5), dont la première extrémité regarde l'extrémité arrière de l'organe de tension et dont la seconde regarde l'extrémité arrière de l'organe de tension, étant essentiellement pressé dans la direction radiale autour de l'organe de tension, de telle manière que le premier point de séparation (4) se situe dans un domaine dont le centre se trouve sur la première extrémité de l'élément d'appui (5) et dont la longueur correspond approximativement à celle de l'élément d'appui, caractérisé en ce que le second point de séparation se situe derrière la seconde extrémité de l'élément d'appui (5).
  2. Procédé conforme à la revendication 1, caractérisé en ce qu'un autre élément extérieur (3) est séparé à proximité du premier point de séparation (4) mentionné.
  3. Organe de tension réalisé selon le procédé conforme à la revendication 1 ou 2, avec un élément central (2; 10) et des éléments extérieurs (3; 9), qui sont disposés autour de l'élément central, un élément d'appui (5) entourant l'élément de tension étant disposé à une certaine distance de l'extrémité arrière ancrée dans le sol de l'organe de tension, élément d'appui dont la première extrémité regarde l'extrémité arrière de l'organe de tension et dont la seconde extrémité regarde l'extrémité arrière de l'organe de tension, au minimum un des éléments extérieurs (3; 9) étant intégralement séparé sur un premier point (4) et l'élément central (2; 10) sur un second point; le premier point de séparation étant disposé dans un domaine dont la longueur correspond approximativement à la longueur de l'élément d'appui et qui s'étend de la première extrémité de l'élément d'appui symétriquement dans les deux directions le long de l'organe de tension, caractérisé en ce que le second point de séparation est disposé derrière la seconde extrémité de l'élément d'appui regardant l'extrémité arrière de l'organe de tension.
  4. Organe de tension conforme à la revendication 3, caractérisé en ce que l'élément central et les éléments extérieurs sont des parties d'un toron de fils d'acier.
  5. Organe de tension conforme à la revendication 3, caractérisé en ce que l'élément central est une barre d'acier centrale (10) et les éléments extérieurs sont plusieurs barres d'acier (9) dirigées parallèlement les unes par rapport aux autres disposées concentriquement autour de la barre d'acier centrale (10).
  6. Organe de tension conforme à la revendication 5, caractérisé en ce qu'il existe des douilles de serrage (7) disposées à l'écart de l'élément d'appui et qu'elles sont destinées à presser les barres d'acier extérieures (9) sur la barre d'acier centrale (10).
EP89810506A 1988-07-06 1989-07-04 Procédé pour former un organe de traction ancrable dans le sol Expired - Lifetime EP0350454B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810506T ATE89882T1 (de) 1988-07-06 1989-07-04 Verfahren zum herstellen eines im erdreich verankerbaren zugorganes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2581/88 1988-07-06
CH258188 1988-07-06

Publications (3)

Publication Number Publication Date
EP0350454A2 EP0350454A2 (fr) 1990-01-10
EP0350454A3 EP0350454A3 (en) 1990-04-18
EP0350454B1 true EP0350454B1 (fr) 1993-05-26

Family

ID=4237012

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810506A Expired - Lifetime EP0350454B1 (fr) 1988-07-06 1989-07-04 Procédé pour former un organe de traction ancrable dans le sol

Country Status (9)

Country Link
US (1) US5113634A (fr)
EP (1) EP0350454B1 (fr)
JP (1) JP2846661B2 (fr)
KR (1) KR900001934A (fr)
AT (1) ATE89882T1 (fr)
AU (2) AU3715489A (fr)
DE (1) DE58904466D1 (fr)
HK (1) HK130094A (fr)
MY (1) MY108500A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563110A (zh) * 2015-01-14 2015-04-29 中交水运规划设计院有限公司 剪式恒力仪及其使用方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708948B1 (fr) * 1993-08-09 1995-11-03 Bouygues Sa Procédé pour faciliter l'extraction de l'armature d'un tirant précontraint et tirant correspondant.
EP0659976A3 (fr) * 1993-12-23 1995-09-27 Rsc Mining Proprietary Limited Boulon d'ancrage.
US6056482A (en) 1996-01-11 2000-05-02 Jennmar Corporation Cable bolt head
DE19732023A1 (de) * 1997-07-25 1999-01-28 Drahtwerk Koeln Gmbh Verfahren zum Herstellen und zum Entfernen einer Litze mit Soll-Bruchstelle
US6601354B2 (en) * 2001-07-12 2003-08-05 Bill Hughes Method and apparatus for post-tensioning steel strands in slab construction
AU2008200918B2 (en) * 2007-02-28 2014-07-31 Fci Holdings Delaware, Inc. Improved cable bolt

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936924A (en) * 1973-09-21 1976-02-10 Yoshio Ichise Releaseable steel cable anchor and method for withdrawing the same
US4069677A (en) * 1975-06-20 1978-01-24 Kabushiki Kaisha Nitto Tekuno Group Anchor and method for constructing same
JPS54141005A (en) * 1978-04-22 1979-11-01 Sanshin Kensetsu Kogyo Kk Removed anchor wire strand structure
JPS5827368B2 (ja) * 1978-05-26 1983-06-09 神鋼鋼線工業株式会社 除去式ア−スアンカ−工法
JPS59217830A (ja) * 1983-05-23 1984-12-08 Suzuki Kinzoku Kogyo Kk 除去式アンカ−工法
CH671057A5 (fr) * 1986-04-28 1989-07-31 Vsl Int Ag
US4719658A (en) * 1986-10-15 1988-01-19 Special Personal And Financial Planning And Referral Services, Inc. Hermetically sealed anchor construction for use in post tensioning tendons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104563110A (zh) * 2015-01-14 2015-04-29 中交水运规划设计院有限公司 剪式恒力仪及其使用方法

Also Published As

Publication number Publication date
KR900001934A (ko) 1990-02-27
AU3715489A (en) 1990-01-11
JP2846661B2 (ja) 1999-01-13
US5113634A (en) 1992-05-19
DE58904466D1 (de) 1993-07-01
EP0350454A2 (fr) 1990-01-10
EP0350454A3 (en) 1990-04-18
MY108500A (en) 1996-10-31
JPH0249816A (ja) 1990-02-20
AU8142791A (en) 1991-10-10
AU639355B2 (en) 1993-07-22
HK130094A (en) 1994-12-02
ATE89882T1 (de) 1993-06-15

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