EP2372026B1 - Cable de tension et ancrage au sol fabriqué à l'aide de celui-ci - Google Patents

Cable de tension et ancrage au sol fabriqué à l'aide de celui-ci Download PDF

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Publication number
EP2372026B1
EP2372026B1 EP10009682.5A EP10009682A EP2372026B1 EP 2372026 B1 EP2372026 B1 EP 2372026B1 EP 10009682 A EP10009682 A EP 10009682A EP 2372026 B1 EP2372026 B1 EP 2372026B1
Authority
EP
European Patent Office
Prior art keywords
pressure pipe
anchor
predetermined breaking
pipe according
longitudinal grooves
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.)
Active
Application number
EP10009682.5A
Other languages
German (de)
English (en)
Other versions
EP2372026A2 (fr
EP2372026A3 (fr
Inventor
Florian Dipl.-Ing. Stützel
Otmar Dipl.-Ing. Langwadt
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.)
Dywidag Systems International GmbH
Original Assignee
Dywidag Systems International GmbH
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.)
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Publication date
Application filed by Dywidag Systems International GmbH filed Critical Dywidag Systems International GmbH
Publication of EP2372026A2 publication Critical patent/EP2372026A2/fr
Publication of EP2372026A3 publication Critical patent/EP2372026A3/fr
Application granted granted Critical
Publication of EP2372026B1 publication Critical patent/EP2372026B1/fr
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Anticipated expiration legal-status Critical

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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
    • E02D5/76—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
    • 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
    • E02D5/805—Ground anchors with deformable anchoring members
    • 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
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material

Definitions

  • the invention relates to a pressure tube for a pressure tube anchor according to the preamble of patent claim 1 and a ground anchor made therefrom according to claim 15.
  • armatures have an anchor pull member, which consists of one or more individual elements or steel wire strands and which is tensioned after its anchoring in the wellbore deepest with its anchor head at the air-borehole end.
  • so-called pressure tube anchors are known in which the Ankerzugglied is performed without bonding to the ground to the borehole deepest.
  • the anchor traction is introduced via an anchor base construction in the soil by the Ankerfußkonstrutation on one or more, the Ankerzugglied enveloping pressure tubes supported, which have been brought by injection in frictional connection with the borehole wall and thus the ground.
  • the spot welds are so weak that the welds break at a load transverse to the longitudinal axis of the anchor body and only the hollow cylindrical Steel rings remain, of which due to their relatively small size, a lower potential for interference emanates.
  • a similar structure shows in the EP 0 545 471 A1 disclosed anchor whose anchor body is also formed by a variety of cylindrical but made of high-strength concrete pressure pipes.
  • the pressure pipes are loosely strung together axially, so that in the course of subsequent construction measures, the individual pressure body can be easily destroyed or displaced into the surrounding soil.
  • the pressure pipes consist of cylinder segments, such as half shells. In this way, remain after the expansion of the anchor comparatively small parts with correspondingly lower potential for interference in the ground.
  • the loose segments to be assembled into a pressure tube present considerable difficulties in assembling and installing such an anchor.
  • the object of the invention is to design pressure pipes or pressure pipe anchors produced therefrom in such a way that anchors can be produced quickly and easily and that no or only minor disturbances of the construction process emanate from the anchors with regard to subsequent construction measures.
  • the invention proceeds to solve the problem set the known way to make the anchor body formed from pressure pipes so that its dissolution in small pieces is possible.
  • an inventive pressure tube from a rigid body, so it is solid in itself, which greatly facilitates the assembly of the pressure tube anchor and its installation in a well and thus accelerated.
  • An easy destructibility of the pressure pipes in the course of subsequent construction measures is achieved according to the invention by means of predetermined breaking points, which extend in the longitudinal direction of the pressure tube. This ensures that the force absorption capacity of the pressure pipes in the axial direction is not impaired during the service life of the armature, while thereafter by force acting transversely to the longitudinal axis easily a breakage of the pressure pipes can be brought about. By destroying the pressure pipes, a reduction in the maximum size of the fragments is achieved.
  • a predetermined breaking point in the sense of the invention, areas of reduced strength with respect to adjacent areas of higher strength are understood. There are several possibilities for forming such regions, for example the reduction of the tube wall thickness and / or the use of different materials with different strengths and / or the provision of perforations or breakthroughs. At least along a generatrix of the pressure tube such a predetermined breaking point is provided, which can be arranged on the outer circumference or inner circumference of the pressure tube.
  • a plurality of predetermined breaking points are provided according to a particular embodiment of the invention. These can be distributed uniformly over the circumference of the pressure tube relative to the cross section of the pressure tube, wherein at adjacent predetermined breaking points by a change of the course on the outside or inside of the pressure tube, the reliability that a break occurs at a given force is further increased.
  • Predetermined breaking points with reduced pipe wall thickness are formed in a preferred embodiment of the invention as longitudinal grooves.
  • the arbitrarily adjustable depth of the longitudinal grooves, the strength of the predetermined breaking point can be adjusted continuously and thus the necessary force for the destruction of the pressure tube.
  • Exemplary grooves are called, which themselves extend in the radial direction over 80%, 50% or 25% of the unattenuated pipe wall thickness, with any other intermediate values, for example 30%, 40%, 60%, 70%, are to be regarded as disclosed.
  • the longitudinal grooves preferably have a continuous course, so that stresses in the corner region between groove bottom and groove flank do not cause any additional weakening of the pressure tube.
  • Fig. 1 shows in a clear representation of a pressure tube anchor 1 according to the invention, which is arranged within a borehole 2.
  • the Ankerzugglied 3 of the pressure tube anchor 1 consists of a single element in the form of a ribbed steel rod, the ribs form a thread and the longitudinal axis carries the reference numeral 4. Except for the end portions of the Ankerzugglied 3 is surrounded by a cladding tube 5, within which it is guided longitudinally displaceable without adhesion.
  • the armature link 3 encloses a cuff-like supporting element 9, which is supported with a lower annular flange on the abutment plate 6 and with an upper annular flange an anchor plate 10 carries, in which the pressure tube anchor 1 is held with its anchor head 11.
  • the anchor plate 10 has a likewise central opening 12, the spherical surface of which is the air side expands. At the lower edge of the opening 12 includes a transverse to the anchor plate 10 extending pipe socket 13, which forms a connection to the upper end of the cladding tube 5 with its free end.
  • an anchor nut 14 is screwed onto the air-side end of the Ankerzugglieds 3, which has a corresponding to the shape of the soffit surface of the opening 12 spherical peripheral portion and is supported with this on the anchor plate 10.
  • the complementary design of anchor nut 14 and anchor plate 10 allows an angle compensation, if the anchor plate 10 is not perpendicular to the longitudinal axis 4 of the pressure tube anchor 1.
  • a bell-shaped cap 15 is further pushed onto the Ankerzugglied 3, which surrounds the anchor nut 14 and closes tightly to the anchor plate 10 back.
  • the cap 15 is fixed by means of a further, screwed onto the end of the Ankerzugglieds 3 nut 16th
  • the anchor foot construction comprises a sleeve-like anchor foot 19 whose internal thread is in engagement with the ribs of the Ankerzugglieds 3. In this way, a tensile and pressure resistant, but at the same time releasable connection between the Ankerzugglied 3 and anchor foot 19 comes about.
  • Each pressure tube 20 is provided at its outer periphery with spacers 21 which center the pressure tube anchor 1 in the borehole 2.
  • the cavity between the wall of the borehole 2 and the pressure tube anchor 1 is pressed with a curable injection material 22.
  • the hardened injection material 22 thus forms within the bore hole 2 a Verpressenia which causes a toothing mainly between the pressure pipes 20 and the wall of the borehole 2, so that the originating from the Ankerzugglied 3, axially acting on the pressure pipes 20 forces on the grout in Substrate 7 can be delivered.
  • the exact structure of the pressure pipes 20 goes out of the Fig. 2 to 5 out.
  • the pressure pipes 20 each consist of a circular-cylindrical one-piece body, made of a material with a low elongation at break, for example made of cast steel, glass, concrete, ceramic and the like.
  • Along side generatrices extends a first pair of longitudinal grooves 23, which lie diametrically opposite relative to the longitudinal axis 4.
  • the longitudinal grooves 23 In cross-section, the longitudinal grooves 23 each have a continuous course, ie have neither corners nor edges.
  • the sides 24 are inclined symmetrically to each other, so that the groove cross-section to the rounded groove bottom 25 becomes narrower.
  • the longitudinal grooves 23 extend from the outer circumference to about 75% of the wall thickness of the pressure tube 20, so that webs 30 remain there as a residual cross section.
  • a second pair of longitudinal grooves 26, which also extend in a diametrical position axially parallel to the longitudinal axis 4 along the inner wall of the pressure tube 20.
  • the longitudinal grooves 26 also have a continuous course with in the direction of the rounded base 27 converging sides 28.
  • the radial depth of the longitudinal grooves 26 is also about 75% of the wall thickness of the pressure tube 20, so that there webs 30 are formed. Otherwise, a plurality of circumferential ribs 29, whose function is to produce a secure bond to the injection material 22, are distributed over the outer circumference.
  • predetermined breaking points are within the scope of the invention.
  • areas of reduced pipe wall thickness may additionally have a perforation and / or consist of a material of lesser strength.
  • pressure pipes are within the scope of the invention, the predetermined breaking points are formed only by perforations and / or areas with a material of lesser strength.

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)

Claims (15)

  1. Tube de pression pour un ancrage à tube de pression (1) pourvu d'un tirant d'ancrage (3) constitué d'un ou plusieurs éléments individuels comme par exemple des barres d'acier, des fils d'acier ou des torons de fils d'acier, sachant que le tirant d'ancrage (3) est destiné à être introduit dans un trou (2) foré dans le sol (7) et à être ancré par son pied d'ancrage (19) dans le fond (18) du trou foré, et pourvu d'un ensemble (11) de tête d'ancrage pour tendre le tirant d'ancrage (3) à l'extrémité côté air extérieur du trou foré (2), sachant que le tirant d'ancrage (3) est entouré dans la région située avant le pied d'ancrage (19) par au moins un tube de pression (20), qui se trouve en liaison à force avec la paroi du trou foré au moyen d'un corps de compression (22), caractérisé en ce que le tube de pression (20) présente sur sa périphérie au moins une zone (23, 26) de rupture privilégiée qui s'étend dans la direction longitudinale (4) du tube de pression (20), afin de produire la rupture du tube de pression (20) lors d'une sollicitation transversalement à son axe longitudinal (4).
  2. Tube de pression selon la revendication 1, caractérisé en ce que la zone (23, 26) de rupture privilégiée au moins unique est disposée sur la périphérie intérieure et/ou sur la périphérie extérieure du tube de pression (20).
  3. Tube de pression selon la revendication 1 ou 2, caractérisé en ce qu'il est prévu deux zones (23, 26) de rupture privilégiée ou davantage, qui sont de préférence disposées en symétrie axiale par rapport à la section du tube de pression.
  4. Tube de pression selon la revendication 3, caractérisé en ce que les zones (23, 26) de rupture privilégiée sont diamétralement opposées.
  5. Tube de pression selon l'une des revendications 1 à 4, caractérisé en ce que la zone (23, 26) de rupture privilégiée au moins unique est formée par des régions d'épaisseur de paroi de tube réduite.
  6. Tube de pression selon la revendication 5, caractérisé en ce que l'épaisseur de paroi du tube de pression (20) dans la région de la zone (23, 26) de rupture privilégiée est égale au maximum à 80 % de l'épaisseur dans la région non affaiblie du tube de pression (20), de préférence au maximum à 50 %.
  7. Tube de pression selon la revendication 5 ou 6, caractérisé en ce que les régions d'épaisseur de paroi de tube réduite consistent en des rainures longitudinales (23, 26).
  8. Tube de pression selon la revendication 7, caractérisé en ce que les rainures longitudinales (23, 26) présentent une allure de section progressive.
  9. Tube de pression selon la revendication 7 ou 8, caractérisé en ce que les rainures longitudinales (23, 26) possèdent des côtés de rainure (28) qui convergent en direction du fond de rainure.
  10. Tube de pression selon l'une des revendications 7 à 9, caractérisé par une première paire de rainures longitudinales (23) diamétralement opposées en coupe transversale, qui est disposée en s'étendant axialement sur la périphérie extérieure du tube de pression (20), et par une deuxième paire de rainures longitudinales (26) diamétralement opposées, qui est disposée en s'étendant axialement sur la périphérie intérieure du tube de pression (20), sachant que la deuxième paire de rainures longitudinales (26) est disposée avec un décalage angulaire par rapport à la première paire de rainures longitudinales (23), de préférence avec un décalage angulaire d'environ 90 degrés.
  11. Tube de pression selon l'une des revendications 1 à 5, caractérisé en ce que la zone de rupture privilégiée au moins unique est formée par une région dont le matériau se distingue du reste du tube de pression par une résistance inférieure.
  12. Tube de pression selon l'une des revendications 1 à 5, caractérisé en ce que la zone de rupture privilégiée au moins unique est formée par une région avec des perforations ou des ouvertures dans le tube de pression.
  13. Tube de pression selon l'une des revendications 1 à 12, caractérisé en ce que le tube de pression (20) est constitué d'un matériau cassant, de préférence de fonte, de verre, de céramique ou de béton.
  14. Tube de pression selon l'une des revendications 1 à 13, caractérisé en ce que le tube de pression (20) est réalisé d'un seul tenant.
  15. Ancrage au sol avec un tube de pression (20) selon l'une des revendications 1 à 14.
EP10009682.5A 2010-03-30 2010-09-16 Cable de tension et ancrage au sol fabriqué à l'aide de celui-ci Active EP2372026B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201020004381 DE202010004381U1 (de) 2010-03-30 2010-03-30 Druckrohr sowie daraus hergestellter Erdanker

Publications (3)

Publication Number Publication Date
EP2372026A2 EP2372026A2 (fr) 2011-10-05
EP2372026A3 EP2372026A3 (fr) 2014-07-02
EP2372026B1 true EP2372026B1 (fr) 2015-11-11

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ID=42558367

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10009682.5A Active EP2372026B1 (fr) 2010-03-30 2010-09-16 Cable de tension et ancrage au sol fabriqué à l'aide de celui-ci

Country Status (3)

Country Link
EP (1) EP2372026B1 (fr)
DE (1) DE202010004381U1 (fr)
ES (1) ES2561049T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105544550A (zh) * 2016-02-07 2016-05-04 北京市勘察设计研究院有限公司 一种通过利用气囊封堵装置的反重力加压注浆方法
NL2018677B1 (en) 2017-04-10 2018-10-19 Univ Delft Tech Injected bolted connection
CN112576291A (zh) * 2020-12-29 2021-03-30 中国地质调查局武汉地质调查中心(中南地质科技创新中心) 一种玄武岩纤维筋的锚索及其监测系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2353652C2 (de) 1973-10-26 1983-03-24 Karl Bauer Spezialtiefbau GmbH & Co KG, 8898 Schrobenhausen Ausbaubarer Verpreßanker mit verlorenem Ankerkörper
NL9102004A (nl) 1991-11-29 1993-06-16 Hollandsche Betongroep Nv Werkwijze voor het aanbrengen van een anker ter verankering van grondkerende wanden, bouwwerken, oeverbeschoeiingen, kademuren en dergelijke.
EP1486617A1 (fr) 2000-05-08 2004-12-15 Dywidag-Systems International GmbH Ancrage injecté récupérable

Also Published As

Publication number Publication date
EP2372026A2 (fr) 2011-10-05
ES2561049T3 (es) 2016-02-24
EP2372026A3 (fr) 2014-07-02
DE202010004381U1 (de) 2010-08-12

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