EP1707684B1 - Procédé et dispositif pour tendre d'un ancrage étagé - Google Patents

Procédé et dispositif pour tendre d'un ancrage étagé Download PDF

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Publication number
EP1707684B1
EP1707684B1 EP06004436A EP06004436A EP1707684B1 EP 1707684 B1 EP1707684 B1 EP 1707684B1 EP 06004436 A EP06004436 A EP 06004436A EP 06004436 A EP06004436 A EP 06004436A EP 1707684 B1 EP1707684 B1 EP 1707684B1
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EP
European Patent Office
Prior art keywords
clamping
tension members
tensioning
plane
tension
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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.)
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EP06004436A
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German (de)
English (en)
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EP1707684A1 (fr
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Dywidag Systems International GmbH
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Dywidag Systems International GmbH
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Priority to SI200630459T priority Critical patent/SI1707684T1/sl
Priority to PL06004436T priority patent/PL1707684T3/pl
Publication of EP1707684A1 publication Critical patent/EP1707684A1/fr
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Publication of EP1707684B1 publication Critical patent/EP1707684B1/fr
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    • 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 method and an arrangement for tensioning a step anchor according to the preamble of independent claim 1 and the preamble of independent claim 13.
  • Ground anchors are well known, for example as a ground or rock anchors. As a rule, they consist of a plurality of axially parallel tension members of steel rods, steel wires or steel wire strands, which are inserted into a borehole. By pressing in the deepest borehole, a grout body is created, which brings the tension members for load transmission into the ground in conjunction with the surrounding soil.
  • the longitudinal section of a tension member which serves for load transfer is referred to as anchoring length L tb .
  • anchoring length L tb The longitudinal section of a tension member which serves for load transfer is referred to as anchoring length L tb .
  • anchoring length L tb The longitudinal section of a tension member which serves for load transfer is referred to as anchoring length L tb .
  • anchoring length L tb The longitudinal section of a tension member which serves for load transfer is referred to as anchoring length L tb .
  • anchoring length L tb At the opposite end of the tension members are anchored in
  • a step anchor is a particular embodiment of a grout anchor in which the load transfer area is not concentrated at the end of the grout anchor, but distributed over a larger L Lucassabites.des grout anchor. Due to the distribution of the anchor force on an extended load transfer area a uniform load application takes place in the ground and thus an improvement of the anchor effect. The distribution of the loads is achieved by the use of tension members of different lengths, the ends of which end in different borehole depths. This results in an axial staggering of the anchoring length L tb in the borehole.
  • step anchors are tensioned with hydraulically connected individual clamping presses, ie each tension member is assigned a clamping press which stretches the tension member until it reaches the test load Fp. Due to the different free steel lengths L tf of the tension members result in different strain paths. After reaching the test load Fp the individual tension members are set to a uniform service load, ie after completion of the clamping operation, all tension members, regardless of their length, the same load in use.
  • clamping bodies which are in each case zvvischschaltet between tension member and tensioning device in the region of the clamping anchorage.
  • a clamping body consists essentially of a cylindrical thick-walled plate, in which coaxial with the clamping direction of the individual tension members extending cylindrical recesses are introduced, in which cylindrical pistons are mounted longitudinally displaceable. The space between the piston and recess is filled in each case with a pressure fluid and the cavities of all clamping bodies are connected to each other in the manner of a communicating system.
  • Each piston has an axial through hole for the passage of a tension member which is fixed by means of anchoring wedges at the piston end.
  • the tensioning of the individual tension members is then carried out with the aid of a tensioning press whose force acts on the tensioning body.
  • a load balance between the individual tension members takes place in that the pistons with the individual anchoring points can perform a compensating movement along the tensioning direction.
  • the invention has the object to provide a method and an arrangement for clamping step anchors, with which simplifies the clamping operation and the bearing behavior of a step armature is improved in case of overstretching.
  • the basic idea of the invention is to set the tension members of a step anchor based on their respective elongation at a predetermined maximum load to the use state of the step armature that all tension members are stretched in the use state by a uniform amount of length less than at a predetermined maximum load.
  • the expansion difference of the tension members between prestress with predetermined maximum load and the load in use is thus an identical amount for all tension members. Due to the different free steel lengths of the individual tension members, however, the uniform change in length of the tension members in the transition to the use state leads to different stress states of the individual tension members.
  • the predetermined maximum load is freely selectable according to the specific requirements of the particular application and will advantageously correspond to the test load F P of the tension members to fully exploit their possible carrying capacity.
  • an inventive step anchor is characterized by a high security against failure.
  • the basic idea described can be implemented by tensioning the tension members of the step armature by means of individual clamping presses up to the predetermined maximum load and then releasing it in a path-dependent or force-dependent manner.
  • the draining of the tension members can be done individually or at a time. Thereafter, all tension members of the step anchor have a uniform load reserve.
  • a particularly preferred embodiment of the invention takes a different route.
  • the extension travel is calculated until a predetermined maximum load, preferably the test load Fp, for each tension member is reached.
  • a predetermined maximum load preferably the test load Fp
  • tension members are tensioned with different lengths of free steel successively and until reaching the predetermined maximum load with different, previously calculated strain. From the expansion differences in the tensioning path of different tension members, it follows that only when the predetermined maximum load is reached does the same tension condition occur in all tension members.
  • the advantage of this procedure is initially that only one press is required for the clamping operation.
  • This may be, for example, a commercially available bundle clamping press, resulting in the operator of a method according to the invention only low investment costs compared to the use of single clamping presses.
  • the clamping process of a step armature is limited to only one working stroke and is thus accomplished quickly. Since only one press is used, this results in only a small effort for measurement and logging. This is sufficient for the invention to a simple operation and quick execution of the clamping process, which not least increases their cost-effectiveness.
  • the step armature After tensioning the tension members to the predetermined maximum load, the step armature is set to the use condition.
  • a condition is also produced here in which the individual tension members are stretched to a lower extent than the elongation under the predetermined maximum load for all tension members.
  • all tension members have the same expansion reserve until the predetermined maximum load is reached while the stanchion is working.
  • the anchor force can be increased without overuse of the armature.
  • An inventively prestressed step armature thus provides optimum safety against overstretching at a simple and faster implementation of the clamping process.
  • Fig. 1 shows a ground anchor as a step anchor 1 in use.
  • the step anchor 1 is inserted into a borehole 2 whose air-side opening is bordered by a support plate 3.
  • the support plate 3 has a central opening through which the Step anchor 1 extends with its air-side end.
  • the longitudinal axis of the step armature 1 is denoted by 14.
  • the step anchor 1 is composed of several axially parallel tension members 4, 5 and 6 together.
  • Each of the tension members 4, 5 and 6 consists essentially of a steel wire strand 7 which is provided with a sheath 8 over most of its length.
  • the end 9 of the steel wire strand 7 assigned to the borehole bottom remains naked. Due to the different lengths of the tension members 4, 5 and 6 results in a longitudinal direction 14 of the step armature 1 staggered arrangement of the ends 9 of the steel wire strands 7 in the borehole second
  • anchoring length L tb The region of the tension members 4, 5, 6, which is effective for the load transfer into the ground, is referred to as anchoring length L tb .
  • the sheath 8 prevents the formation of a frictional bond between the strands 7 and the injection mortar 13.
  • the strands 7 are arranged freely stretchable in the casing 8 despite the injection mortar 13, so that in the region of the casing 8 no load transfer in the underground can take place.
  • the range of the free extensibility of the strands 7 is referred to as free steel length L tf and is in FIG. 1b drawn only for the tension member 6.
  • Fig. 1b can be seen in a step anchor 1, the load entry into the ground in accordance with the staggered in the wellbore 2 arrangement of the free ends. 9
  • the anchoring force is thus not concentrated in an anchoring plane registered in the ground, but on a determinable by the choice of staggering of the tension elements 4, 5, 6 longitudinal section, which consists in the present example of the triple anchoring length L tb .
  • Fig. 2 shows an arrangement for clamping the in Fig. 1 described step anchor 1 in a longitudinal section.
  • Fig. 2 shows an arrangement for clamping the in Fig. 1 described step anchor 1 in a longitudinal section.
  • the strands 7 of the tension members 4, 5 and 6 are not yet separated behind the anchoring wedges 12 ( please refer Fig. 1 ), but continue in the longitudinal axis 14 of the step armature 1 to allow the attachment of a clamping arrangement.
  • the clamping assembly shown essentially comprises a bundle clamping press 15 with an aligned in the armature longitudinal axis 14, the housing of the bundle clamping press 15 forming clamping cylinder 16 and a displaceably arranged therein clamping piston 17.
  • the clamping cylinder 16 has handles for better handling handles 18, the clamping piston 17 a central implementation the strands 7 of the tension members 4, 5 and 6.
  • Fig. 2 shows the bundle clamping press 15 in the starting position for the clamping operation, in which the clamping piston 17 is fully retracted into the clamping cylinder 16. To tension the step armature 1, the tensioning piston 17 is extended.
  • the clamping path described by the clamping piston 17 defines both the clamping axis 26 and the clamping direction 27th
  • the bundle clamping press 15 is supported on a hollow cylindrical component 19, which serves to retain the anchoring wedges 12 in the receptacles 11 of the anchoring plate 10 during tensioning of the tension members 4, 5, 6.
  • the component 19 is placed for this purpose on the anchoring plate 10 and thus interposed pressure force transmitting between the bundle clamping press 15 and anchor plate 10.
  • the retention of the anchoring wedges 12 causes a wedge retaining disk 20 which closes the front side of the component 19.
  • the wedge retaining disk 20 travels during the release of the tension members 4, 5, 6 during the test procedure with the anchoring wedges 12.
  • the tensioning piston 17 carries with its free end a likewise plate-shaped clamping plate 21, which largely corresponds in their training of the anchor plate 10.
  • the clamping plate 21 thus has through holes, which widen conically to the formation of receptacles 22 to the end face 23. Through each receptacle 22, the bare strand 7 of the tension members 4, 5 and 6, which thus protrude with its free end over the end face 23 of the clamping plate 21 extends.
  • clamping wedges 25 On the protruding ends of the strands 7 sit blocking elements in the form of clamping wedges 25, whose task is to fix the strands 7 for the clamping operation relative to the clamping plate 21 in the clamping direction 27. This is done by clamping the strand 7 by means of a clamping wedge 25, which in turn is supported against the wall of the receptacle 22 of the clamping plate 21. Although the clamping force over the entire length of the clamping wedge 25 is entered into the strand 7. However, in order to simplify the understanding of the invention, the clamping effect is reduced to an idealized clamping plane A, B, C aligned with the clamping axis 26 and clamping wedge-specific in the further consideration.
  • the clamping wedges 25 are arranged staggered in the clamping direction 26 before clamping.
  • the clamping wedge 25 for the strand 7 of the tension member 4 thus defines the clamping plane A, the clamping wedge 25 for the strand 7 of the tension member 5, the clamping plane B and the clamping wedge 25 of the strand 7 of the shortest tension member 6, the clamping level C.
  • the distance of the clamping plane B of the terminal level A is in FIG. 2 with ⁇ l 1 , the distance of the clamping plane C from the clamping plane A with ⁇ l 2 .
  • clamping plane 24 that plane which is aligned radially with respect to the clamping axis 26 is referred to, which moves in the clamping direction 27 during clamping of the step armature 1, thereby transferring the clamping force to the tension members 4, 5, 6.
  • a loading of a strand 7 with clamping force and thus a tension member 4, 5, 6 thus occurs only when the clamping plane 24 has become congruent with one of the clamping plane A, B, C.
  • the clamping plane 24 is embodied by the clamping plate 21.
  • the clamping plane 24 and a clamping plane A, B, C are then congruent as soon as the clamping wedge 25 is firmly seated in the receptacle 22 of the clamping plate 21.
  • This condition is in FIG. 2 reproduced for the tension member 4.
  • the clamping plane 24 is also in the plane of the end face 23 of the clamping plate 21st
  • the detailed structure of belonging to the clamping arrangement clamping wedge 25 is in its entirety in Fig. 6 shown; its individual components in the Fig. 3a, 3b, 4a, 4b ,
  • the Fig. 3a and 3b show the fixing portion 30 of the clamping wedge 25 in a view and plan view.
  • the fixing portion 30 is formed by a thick-walled hollow cylinder 31, in the outer shell in the lower region an annular groove 32 is milled. This results in the lower end face of an annular flange 33, which is characterized by a relation to the hollow cylinder 31 smaller outer diameter.
  • a threaded bore 34 extending radially through the cylinder wall can be seen, which for receiving a grub screw 35 (FIG. Fig. 6 ) serves.
  • the clamping portion 36 consists essentially of three identical wedge segments 37, the cylinder-shaped composite form the shape of a truncated cone with axial through hole. To improve the clamping force transmission, the wall of the through hole is formed profiled.
  • the segments 37 have on their outer peripheral surface an annular groove 38 in which an annular spring 39 is arranged, which holds the three segments 37 together.
  • Such segments 37 are known per se as wedges for tensioning and anchoring tension members.
  • the segments 37 continue axially in the thick-walled region for joint formation of a connecting shaft 42 of constant thickness.
  • the segments 37 have an internal annular groove 40, so that at the front end of the connecting shaft 42, an annular flange 41 ( Fig. 6 ).
  • Fig. 6 is a complete clamping wedge 25 shown, partially in a side view, partially in longitudinal section. It can be seen how a positive connection is formed by axial engagement of the fixing section 30 and the clamping section 36, the annular flanges 33 and 41 respectively engaging the annular grooves 32 and 38 to form a toothing.
  • clamping wedges 25 define the clamping planes A, B, C, it is essential for the invention to attach the clamping wedges 25 in the intended position on the strands 7.
  • the inventive axial distance .DELTA.l between the clamping wedges 25 of the tension members 4, 5 or 6 respectively corresponds to the difference in the expansions of the individual tension members when applying the predetermined maximum load on each tension member from its unloaded initial state.
  • This expansion difference .DELTA.l can be calculated by knowing the free steel length L tf and the predetermined maximum load or the test load Fp.
  • the end face 23 of the clamping plate 21 which also represents the clamping plane 24. Since the clamping wedge 25 of the tension member 4 fixed in the Recording 22 of the clamping plate 21 is seated, its clamping plane A is already in the clamping plane 24 and thus in the reference plane. Therefore, only the distances .DELTA.l 1 must be measured from the reference plane to the clamping plane B of the clamping wedge 25 of the tension member 5 and .DELTA.l 2 from the reference plane to the clamping plane C of the clamping wedge 25 of the tension member 6.
  • the adjusting element 45 consists essentially of an annular disc 46, which corresponds to the fixing section 30 in diameter and the size of the passage opening.
  • a threaded nut 47 is fixed, through which a threaded rod 48 can be screwed perpendicular to the plane of the annular disc 46.
  • a lock nut 49 With the help of a lock nut 49, the position of the threaded rod 48 relative to the annular disc 46 can be defined.
  • On the upper end of the threaded rod 48 sits a cap nut 50. For each set up wedge 25 preferably own own adjustment element 45 is held.
  • the so-preset adjustment elements 45 are together with the clamping wedges 25 in the off Fig. 7 apparent manner on the ends of the strands 7 of the tension members 5 and 6 pushed until the threaded rod 48 respectively runs onto the end face 23 of the clamping plate 21.
  • the distance .DELTA.l 1,2 of the terminal levels A, B, C according to the invention adjusts to one another.
  • FIG Fig. 8 An alternative embodiment of an adjusting element 52 according to the invention is shown in FIG Fig. 8 shown. There you can see a circular disk-shaped base body 53 which is provided according to the number and arrangement of the tension members 4, 5, 6 with through holes. The holes have on their inner surface an internal thread, which is not visible due to the selected representation.
  • each of the bores in each case extends a spacer sleeve 54 whose outer shell has a corresponding to the internal thread external thread 55.
  • the spacer sleeves 54 can be screwed into the through bores of the main body 53.
  • the position of the free end of the spacer sleeves 54 can be adjusted.
  • a screwed onto the spacer sleeve 54 and against the main body 53 supporting the lock nut 56 fixes the position of the spacer sleeve 54 in the set position.
  • the spacer sleeves 54 are adjusted in their mutual position such that their free ends at a distance of the clamping planes A, B, C are arranged, wherein the spacer sleeves 54 with the largest projection to the main body 53 the tension members 4, 5 with a longer free steel path L tf are assigned and spacers 54 with smaller projection to the main body 53 the tension members 5, 6 with smaller free steel length L tf .
  • adjusting element 52 The intended use of such adjusting element 52 is carried out after the locking elements, that is, in the present example, the clamping wedges 25 consisting of clamping portion 36 and fixing portion 30 have been pushed onto the individual strands 7. Thereafter, the free ends of the strands 7 of the individual tension members 4, 5, 6 are individually threaded through their respective associated spacer sleeve 54 and the adjusting member 52 is pushed in total on the strands 7 in the direction of the clamping plate 21. The individual clamping wedges 25 come gradually into contact with the free ends of the spacer sleeves 54, resulting in a distance of the clamping wedges 25th according to the distance of the terminal planes A, B, C among each other.
  • the adjusting element 52 is advantageously pushed as far as the step anchor 1 until the spacer sleeve 54 with the largest projection on the base 53, the clamping wedge 25 on the tension member 4, 5 with the longest free steel length L tf in the associated receptacle 22 in the clamping plate 21 presses.
  • the staggered in the longitudinal direction arrangement of the other clamping wedges 25 on the tension members 5, 6 with shorter free length of steel L tf results automatically.
  • FIG. 9 shows the load increase in the individual tension members 4, 5 and 6 at constant elongation the steeper, the shorter their free steel length L tf . For this reason, shorter tension members to a voltage gradient with higher slope.
  • the distance .DELTA.l 1 of the terminal level A of B and the distance .DELTA.l 2 of the terminal level A of C is chosen so taking into account the respective free steel lengths L tf that the Voltage profiles a, b, c converge with increasing tensioning path in such a way that the predetermined maximum load, preferably the test load F P , is achieved simultaneously in the individual tension members 4, 5 and 6.
  • the individual tension members 4, 5 and 6 on the Useful load F w of the stepped anchor 1 is set. Achieving the service load F w can be displayed via the corresponding press pressure or the press stroke. In this state, longer tension members have higher stresses than shorter tension members ( Fig. 9 ). This results in a uniform expansion reserve for all tension members 4, 5, 6 of the step anchor 1 in the amount of ⁇ l max - .DELTA.l w .

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Bridges Or Land Bridges (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Claims (30)

  1. Procédé pour tendre un ancrage étagé (1) pourvu d'une pluralité de tirants (4, 5, 6) qui sont ancrés à différentes profondeurs dans le trou foré (2) et qui possèdent donc des longueurs différentes d'acier libre (Ltf), sachant que chaque tirant (4, 5, 6) est tendu jusqu'à une charge maximale prédéterminée puis est réglé à la charge de travail (FW), caractérisé en ce que, pour régler l'ancrage étagé (1) à la charge de travail (FW), les tirants (4, 5, 6) sont tous réglés à un allongement (ΔlW) réduit d'une différence d'allongement uniforme ((Δlmax - ΔlW) par rapport à l'allongement respectif (Δlmax) à la charge maximale prédéterminée.
  2. Procédé selon la revendication 1, caractérisé en ce que la charge maximale prédéterminée correspond à la charge de test (FP).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le réglage à la charge de travail (FW) s'effectue en détendant les tirants (4, 5, 6).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé en ce que le réglage des tirants (4, 5, 6) à la charge de travail (FW) s'effectue en fonction de la course ou en fonction de la force.
  5. Procédé selon l'une des revendications 1 à 4, caractérisé en ce que les tirants (4, 5, 6) sont tous simultanément détendus.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le processus de tension commence avec les tirants (4, 5, 6) de plus grande longueur d'acier libre (Ltf) et se poursuit avec les tirants (4, 5, 6) de plus courte longueur d'acier libre (Ltf).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le processus de tension s'achève simultanément pour tous les tirants (4, 5, 6).
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que les tirants (4, 5, 6) de même longueur d'acier libre (Ltf) sont simultanément tendus.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que les tirants (4, 5, 6) sont tendus indépendamment les uns des autres.
  10. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que la tension des tirants (4, 5, 6) s'effectue dans un unique plan de tension (24) pour tous les tirants (4, 5, 6), sachant qu'on définit avant la tension un plan de serrage (A, B, C) pour chaque tirant (4, 5, 6), et qu'à l'atteinte du plan de serrage (A, B, C) d'un tirant (4, 5, 6) par le plan de tension (24), on réalise un couplage de force entre le plan de tension (24) et le tirant (4, 5, 6), sachant que les plans de serrage (A, B, C) des tirants plus courts (4, 5, 6) se situent, dans la direction de tension, après les plans de serrage (A, B, C) des tirants plus longs (4, 5, 6).
  11. Procédé selon la revendication 10, caractérisé en ce que la définition de l'espacement (ΔI1,2) entre les plans de serrage (A, B, C) s'effectue de telle sorte que, à l'atteinte d'une charge limite prédéterminée de l'ancrage étagé (1), les tirants (4, 5, 6) présentent tous un état de tension identique, de préférence la charge de test (FP).
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que l'espacement (ΔI1,2) entre les plans de serrage (A, B, C) correspond à la différence d'allongement des tirants individuels (4, 5, 6) jusqu'à l'atteinte d'une charge maximale prédéterminée, de préférence de la charge de test (FP), du fait des longueurs différentes d'acier libre des tirants individuels (4, 5, 6).
  13. Dispositif pour tendre un ancrage étagé (1) se composant de plusieurs tirants (4, 5, 6) ayant des longueurs différentes d'acier libre (Ltf), au moyen d'une presse tendeuse (15) qui est disposée entre un plan d'ancrage (10) côté trou foré et un plan de tension (24), et qui est pourvue d'une plaque de serrage (21) disposée dans le plan de tension (24) et pouvant être déplacée par la presse tendeuse (15) dans la direction de tension (27), sachant que les tirants individuels (4, 5, 6) sont respectivement pourvus d'un élément de blocage (25) qui fixe en position les tirants (4, 5, 6) dans le plan de tension (24) par rapport à la plaque de serrage (21), caractérisé en ce que plusieurs tirants (4, 5, 6) de longueurs différentes d'acier libre (Ltf) sont associés à la plaque de serrage (21), et les éléments de blocage (25) sont disposés dans des plans de serrage (A, B, C) échelonnés relativement à la direction de tension.
  14. Dispositif selon la revendication 13, caractérisé en ce que les éléments de blocage (25) de tirants (4, 5, 6) de même longueur d'acier libre (Ltf) sont tous associés au même plan de serrage (A, B, C).
  15. Dispositif selon la revendication 13 ou 14, caractérisé en ce que les tirants (4, 5, 6) de même longueur d'acier libre (Ltf) sont uniformément répartis sur une ligne circonférentielle par rapport à l'axe de tension (26).
  16. Dispositif selon l'une des revendications 13 à 15, caractérisé en ce que les plans de serrage (A, B, C) de tirants (4, 5, 6) de plus courte longueur d'acier libre (Ltf) sont disposés, dans la direction de tension (27), après les plans de serrage (A, B, C) de tirants (4, 5, 6) de plus grande longueur d'acier libre (Ltf).
  17. Dispositif selon l'une des revendications 13 à 16, caractérisé en ce que l'espacement (ΔI1,2) entre les plans de serrage (A, B, C) s'effectue de telle sorte que, lorsque l'ancrage étagé est sollicité avec une charge limite prédéterminée, les tirants (4, 5, 6) présentent tous un état de tension identique, de préférence la charge de test (FP).
  18. Dispositif selon l'une des revendications 13 à 17, caractérisé en ce que l'espacement entre deux plans de serrage consécutifs (A, B, C) correspond à la différence des allongements (Δl1,2) des tirants individuels (4, 5, 6), pour lesquels les tirants (4, 5, 6) de plus grande longueur d'acier libre (Ltf) présentent la même charge de test (FP) que les tirants (4, 5, 6) de plus courte longueur d'acier libre (Ltf).
  19. Dispositif selon l'une des revendications 13 à 18, caractérisé en ce que les éléments de blocage (25) présentent une partie de serrage cunéiforme (36) en plusieurs éléments et une partie d'immobilisation (30), qui sont mutuellement assemblées, sachant que la partie d'immobilisation (30) permet d'obtenir une fixation en position de l'élément de blocage (25) par rapport au tirant (4, 5, 6) dans le plan de serrage correspondant (A, B, C), et que la partie de serrage (36) permet d'obtenir une fixation en position du tirant (4, 5, 6) par rapport au plan de tension (24).
  20. Dispositif selon la revendication 19, caractérisé en ce que la partie de serrage (36) et la partie d'immobilisation (30) sont mutuellement assemblées par une configuration en engagement positif dans la région de chevauchement, en particulier par une rainure annulaire (32, 40) et une bride annulaire (33, 41).
  21. Dispositif selon la revendication 19 ou 20, caractérisé en ce que la partie d'immobilisation (30) possède une forme annulaire et présente un perçage fileté radial (34), dans lequel est disposée une vis sans tête (35) pour fixer en position la partie d'immobilisation (30) par rapport au tirant (4, 5, 6).
  22. Dispositif selon l'une des revendications 13 à 21, caractérisé par un élément d'ajustement (45) pour aligner un élément de blocage (25) dans le plan de serrage associé (A, B, C), sachant que l'élément d'ajustement (45) peut être amené en contact avec l'élément de blocage (25) pour former un plan de référence et possède un écarteur agissant contre une surface de référence, de préférence contre la plaque de serrage (21).
  23. Dispositif selon la revendication 22, caractérisé en ce que l'élément d'ajustement (45) comprend une rondelle annulaire (46) pouvant être enfilée sur un tirant (4, 5, 6).
  24. Dispositif selon la revendication 22 ou 23, caractérisé en ce que l'écarteur peut être réglé à différentes distances des plans de serrage (A, B, C) par rapport au plan de tension (24).
  25. Dispositif selon l'une des revendications 22 à 24, caractérisé en ce que l'écarteur est constitué d'une tige filetée (48) qui est guidée dans un écrou fileté (47) fixé sur la rondelle annulaire (46), et qui est de préférence bloquée par un contre-écrou (49).
  26. Dispositif selon l'une des revendications 22 à 25, caractérisé en ce que l'élément d'ajustement (45) peut être détaché de l'élément de blocage (25), afin de pouvoir retirer l'élément d'ajustement (45) du tirant (4, 5, 6) après avoir aligné l'élément de blocage (25).
  27. Dispositif selon l'une des revendications 13 à 21, caractérisé par un élément d'ajustement (52) pour aligner tous les éléments de blocage (25) dans les plans de serrage associés (A, B, C), sachant que l'élément d'ajustement (52) possède un corps de base (53) sur lequel des douilles d'espacement (54) parallèles à l'axe sont fixées avec possibilité de réglage dans leur axe longitudinal, sachant que les extrémités des douilles d'espacement (54) sont disposées en étant échelonnées conformément à l'espacement entre les plans de serrage (A, B, C) et qu'une douille d'espacement respective (54) est associée à un tirant (4, 5, 6), de sorte qu'en enfilant l'élément d'ajustement (52) sur les extrémités libres des tirants (4, 5, 6), les éléments de blocage (25) peuvent être amenés en application avec les extrémités des douilles d'espacement (54), conduisant ainsi à leur disposition échelonnée dans les plans de serrage (A, B, C).
  28. Dispositif selon la revendication 27, caractérisé en ce que le corps de base (53) possède des perçages parallèles à l'axe, à filetage intérieur, et les douilles d'espacement (54) présentent un filetage extérieur (55) correspondant au filetage intérieur, de sorte que les douilles d'espacement (54) peuvent être réglées en direction longitudinale dans leur position relative mutuelle par un vissage plus ou moins profond dans le corps de base (53).
  29. Dispositif selon la revendication 28, caractérisé par un contre-écrou (56) qui, afin d'immobiliser localement les douilles d'espacement (54) par rapport au corps de base (53), peut être vissé sur les douilles d'espacement (54).
  30. Dispositif selon l'une des revendications 27 à 29, caractérisé en ce que le corps de base (53) possède essentiellement une forme de disque, de préférence de disque circulaire.
EP06004436A 2005-03-10 2006-03-04 Procédé et dispositif pour tendre d'un ancrage étagé Not-in-force EP1707684B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SI200630459T SI1707684T1 (sl) 2005-03-10 2006-03-04 Postopek in naprava za napenjanje stopenjskega sidra
PL06004436T PL1707684T3 (pl) 2005-03-10 2006-03-04 Sposób i układ do naciągania kotwy wielostopniowej

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005010957A DE102005010957A1 (de) 2005-03-10 2005-03-10 Verfahren und Anordnung zum Spannen eines Stufenankers

Publications (2)

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EP1707684A1 EP1707684A1 (fr) 2006-10-04
EP1707684B1 true EP1707684B1 (fr) 2009-09-02

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EP06004436A Not-in-force EP1707684B1 (fr) 2005-03-10 2006-03-04 Procédé et dispositif pour tendre d'un ancrage étagé

Country Status (9)

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US (1) US7553108B2 (fr)
EP (1) EP1707684B1 (fr)
AT (1) ATE441759T1 (fr)
CA (1) CA2539056C (fr)
DE (2) DE102005010957A1 (fr)
ES (1) ES2330769T3 (fr)
PL (1) PL1707684T3 (fr)
PT (1) PT1707684E (fr)
SI (1) SI1707684T1 (fr)

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DE202017104083U1 (de) 2017-07-07 2017-08-22 Bbv Systems Gmbh Stufenanker zur Verankerung in einem Untergrund oder Bauteil
DE102017211678A1 (de) 2017-07-07 2019-01-10 Bbv Systems Gmbh Stufenanker und Verfahren zur Verankerung eines Stufenankers in einem Untergrund oder Bauteil

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CN101078212B (zh) * 2007-06-21 2010-08-18 李保国 一种锚具及其去除方法
EP2516754B1 (fr) * 2009-12-23 2018-08-29 Geotech Pty Ltd Système d'ancrage
RU2515412C2 (ru) * 2009-12-24 2014-05-10 Фсл Интернациональ Аг Способ и система для равного натяжения множества прядей
CA2698434C (fr) * 2010-04-01 2017-08-08 William James Ekins Systeme d'ancrage de collier de serrage de conduite
WO2012024725A1 (fr) * 2010-08-24 2012-03-01 Mark Ronald Sinclair Système d'ancrage d'une charge
EP2439359A1 (fr) * 2010-10-06 2012-04-11 F.J. Aschwanden AG Procédé de renforcement de plaques bétonnées dans le domaine d'éléments d'appui
CN102677670B (zh) * 2011-03-11 2015-12-09 王立明 一种拆锚式可回收锚杆
CN102359232A (zh) * 2011-11-04 2012-02-22 成都市虹筑路桥机械有限公司 高强度锚下垫板
CN102535754B (zh) * 2012-02-10 2015-11-18 成都市虹筑路桥机械有限公司 一种高强度锚下垫板
US8919057B1 (en) 2012-05-28 2014-12-30 Tracbeam, Llc Stay-in-place insulated concrete forming system
JP6223162B2 (ja) * 2013-12-10 2017-11-01 一般財団法人ダム技術センター ボンド型アンカーの残存引張り力確認方法及びシステム、変位確認方法
JP2016017394A (ja) * 2014-07-11 2016-02-01 株式会社ドーコン 変位抑制装置、及びその設置方法
JP6872231B2 (ja) * 2017-03-02 2021-05-19 長寿補強土株式会社 長期耐久性を有する岩盤斜面の補強構造およびその施工方法
CN107524145A (zh) * 2017-08-17 2017-12-29 龙口矿业集团有限公司 可快速调节锚固力大小的锚索锁具
CN107700848A (zh) * 2017-09-13 2018-02-16 核工业西南勘察设计研究院有限公司 一种减少锚索预应力损失的限位装置
CN110344410A (zh) * 2019-07-15 2019-10-18 中南大学 用于锚杆杆身减震耗能的拼接单元及自减震耗能的锚杆
CN110561614B (zh) * 2019-10-10 2024-06-21 北京好运达智创科技有限公司 一种钢筋预应力张拉及放张装置

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DE202017104083U1 (de) 2017-07-07 2017-08-22 Bbv Systems Gmbh Stufenanker zur Verankerung in einem Untergrund oder Bauteil
DE102017211678A1 (de) 2017-07-07 2019-01-10 Bbv Systems Gmbh Stufenanker und Verfahren zur Verankerung eines Stufenankers in einem Untergrund oder Bauteil

Also Published As

Publication number Publication date
PT1707684E (pt) 2009-10-23
CA2539056A1 (fr) 2006-09-10
ATE441759T1 (de) 2009-09-15
SI1707684T1 (sl) 2010-01-29
EP1707684A1 (fr) 2006-10-04
US20060201100A1 (en) 2006-09-14
DE102005010957A1 (de) 2006-09-14
DE502006004701D1 (de) 2009-10-15
PL1707684T3 (pl) 2010-02-26
US7553108B2 (en) 2009-06-30
ES2330769T3 (es) 2009-12-15
CA2539056C (fr) 2008-12-30

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