WO2023179878A1 - Système et procédé d'ancrage de câble - Google Patents

Système et procédé d'ancrage de câble Download PDF

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Publication number
WO2023179878A1
WO2023179878A1 PCT/EP2022/057997 EP2022057997W WO2023179878A1 WO 2023179878 A1 WO2023179878 A1 WO 2023179878A1 EP 2022057997 W EP2022057997 W EP 2022057997W WO 2023179878 A1 WO2023179878 A1 WO 2023179878A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
anchor head
construction
connector
socket
Prior art date
Application number
PCT/EP2022/057997
Other languages
English (en)
Inventor
Rachid Annan
Michel SIGG
Ludovic Michel
Original Assignee
Vsl International Ag
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 Ag filed Critical Vsl International Ag
Priority to PCT/EP2022/057997 priority Critical patent/WO2023179878A1/fr
Publication of WO2023179878A1 publication Critical patent/WO2023179878A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations

Definitions

  • the present invention relates to a cable anchorage system and a method for anchoring a cable at a construction, e. g. a civil engineering construction, according to the introductory part of patent claims 1 and 14.
  • Cables like stay cables or cable hangers, are widely used for the design of civil engineering constructions like bridges, suspended roofs, cable stabilized building structures, stayed masts or towers and the like.
  • the cables are usually realized by a plurality of twisted metal cable threads to provide the tensile force needed to absorb the heavy loads of the construction.
  • One construction may require dozens of cables to achieve the strength and the statics involved in a cable construction design.
  • the cables are anchored with one end at the construction and with the opposite end at a support, like a ground foundation, or at another part of the construction.
  • Heavy duty anchor systems and tendons are used to mount a cable to the construction and then tension the cable to the tensile force required for the design of the construction.
  • the application of the cables is problematic due to the very high weight and large dimensions of the cables, the high tensile forces required, and the overall size of the cable set up. Additionally outdoor environmental conditions impede the handling of the cables.
  • the first type uses a turnbuckle concept, wherein a rod features threads of opposite pitch at each extremity.
  • One end of the rod is screwed into a support socket anchored with a clevis connection.
  • the other end is screwed in a cable socket holding the cable.
  • US 6,681 ,431 B2 shows an adjustable anchor for holding a cable hanger and bearing a civil engineering structure.
  • the cable hanger is attached to an anchor pipe and a clevis is attached to a support.
  • a linking part comprises threads with opposite pitches at each end.
  • the linking part is screwed into the anchor pipe at one end and into the clevis at the opposite end.
  • the clevis is mounted to the support by a pin that extends through oblong holes in the clevis forks with a play between the pin and the hole edges.
  • a tension system pulls the whole unit set up by the anchor pipe with the cable hanger, the linking part and the clevis towards the support resulting in the play being located on the support side of the holes.
  • the linking part By rotating the linking part, the clevis is pulled towards the anchor pipe and the play is located on the cable side of the holes, which tensions the cable.
  • a threaded rod comprises a transfer head interacting with the clevis and a threaded end is threaded into a cable socket.
  • a cable anchorage system as shown in EP 3344817 B1 comprises a support socket attached to a structure by a clevis connection, an anchorage socket holding the cable and a coupling rod coupling the support socket with the anchorage socket.
  • the coupling rod has a mounting head that is slidably located in an interior space of the support socket.
  • the support socket space and the mounting head are provided with interacting abutments to prevent the coupling rod from disengaging from the support socket.
  • the anchorage socket is pulled towards the support socket, wherein the coupling rod slides further into the interior space of the support socket creating a clearance between the interacting abutments.
  • the coupling rod is threaded into the anchoring socket to reduce the clearance and keep the cable tensioned. Again, this process needs to be repeated several times in case the tensioning length of the cable is larger than the clearance.
  • both solutions present the disadvantage of being subjected to high tensile and bending stresses acting on the location of the threaded connections. This forces the use of expensive solutions to manufacture such as threaded rods or tubes, both in the choice of high-performance material or in the choice of onerous methods of thread forming.
  • both concepts present the disadvantage of aligning one component after the other; that is the clevis, the rod or tube for tension introduction or tuning, and the cable anchor. This leads to a long and bulky anchorage system.
  • both concepts require a stage by stage stressing process, where the stroke of stressing or the threading cycle operation impacts directly on the length of the system assembly, making the stressing operations long and fastidious.
  • a cable anchorage system for anchoring a cable at a construction and a method for tensioning such as a cable anchorage system according to independent claims 1 and 14.
  • Advantageous features and preferred embodiments of the cable anchorage system and the method according to the invention are disclosed in dependent claims.
  • a cable anchorage system for anchoring a cable at a construction comprises an anchor head mounted to the cable, a construction socket attachable to the construction and a connector for connecting the anchor head to the construction socket.
  • the anchor head, the construction socket and the connector are generally aligned along the same longitudinal direction, which basically corresponds to the longitudinal direction of the cable.
  • the construction socket can be any unit or system that is designed for fixing the cable to a construction, while the cable is under tensile stress. Most commonly clevis-type fixations are used to attach cables or cable hangers to a construction.
  • the construction is for example a basement, a ground foundation, parts of a civil engineering structure or the like.
  • the construction socket comprises an opening for at least partially receiving the anchor head in a movable manner.
  • the construction socket comprises a section for being mounted to the construction at one end and another section providing the opening at the opposite end.
  • the anchor head can slide or rotate within the opening, while the cable anchorage system is in a pre- anchoring position before the systems takes up the load of the cable stress.
  • the opening of the construction socket has an internal thread.
  • the connector comprises an external thread for engaging with the internal thread of the construction socket. Further, the connector is movably arranged along the anchor head while the cable anchorage system is in the pre-anchoring position. By engaging with the internal thread of the opening of the construction socket the connector provides a longitudinally adjustable stop for the anchor head.
  • the stop can be positioned within the opening along the longitudinal direction of the system by screwing it into the opening.
  • the anchor head comprises a radially extending shoulder, which abuts against the stop of the connector when the connector is adjusted to take a cable tensioning position at the construction socket.
  • the connector acts as a stop for moving the anchor head away from the construction socket when the cable exerts a tensile force on the anchor head.
  • the cable anchorage system can easily be transferred from a preanchoring mode, wherein the anchor head can freely move in the opening of the construction socket, to a cable tensioning mode, wherein the anchor head is blocked from movement relative to the construction socket by the connector stop, by screwing the connector into the opening to the required tensioning position.
  • This design provides a high level of flexibility during the tensioning process, enables the cable anchorage system to quickly pick up the tensile forces after tensioning the cable with a traction force required for the construction and allows for simple adjustment of the system.
  • the connector is completely detachable from the construction socket, so that it can slide along the anchor head before it is screwed to the construction socket. This ensures a large degree of freedom to move the anchor head along the longitudinal direction of the system before fixing the cable in the tensioning position.
  • the method for tensioning the cable anchorage system uses a stressing unit for stressing the cable.
  • the stressing unit comprises a socket bracket attachable to the construction socket, at least one stressing jack attachable to the anchor head and stressing bars connecting the socket bracket and the at least one stressing jack.
  • the at least one stressing jack is driven to slide along the stressing bars towards the construction socket exerting a stressing force on the anchor head and causing the anchor head to slide into the opening of the construction socket until the cable tensioning position is realized.
  • the connector In the cable tensioning position of the anchor head the connector is screwed into the opening until the anchor head abuts against the stop of the connector.
  • the stressing of the cable is easily done in a one-step tensioning process.
  • the cable is stressed by pulling the anchor head mounted to the cable to the required tensioning position and the connector is adjusted to stop the anchor head from releasing the cable stress. It is not required to repeat the tensioning process several times to achieve the required cable tension as it is necessary in the above-described prior art concepts.
  • the stressing unit can be detached from the system and used to stress another cable anchorage system.
  • the construction socket and the connector are overlapping in axial direction such as in a retractable telescopic manner, for instance when in the cable tensioning mode of the system.
  • the connector in the pre-anchoring position the connector may not overlap with the construction socket and may be located outside the opening of the construction socket.
  • the anchor head/connector and the construction socket can be held in relative position to each other by the stressing unit.
  • these two elements are overlapping in axial direction such as in a retractable telescopic manner.
  • the connector is overlapping axially with the construction socket and the anchor head in the cable tensioning mode.
  • the connector Prior to the tensioning of the cable and adjusting the connector stop, the construction socket, the connector and the anchor head can be telescopically moved relative to each other along the longitudinal direction of the cable anchorage system.
  • the connector comprises an accessible tip for positional adjustment in relation to the construction socket.
  • the connector may have attachment points, like holes or small protrusions, at its back end for attaching a rotator device for turning the connector 4 around its longitudinal axis.
  • the anchor head comprises a flat surface, axially orientated, as a bearing for the extension.
  • the extension is an integrated element with the anchor head or a separate piece serving as a tool for moving the connector.
  • the extension may not be essential to form as an integrated piece with the anchor head.
  • extension when it is a separate piece, it serves as a tool for moving the anchor head, allowing (subsequently) to adjust the connector.
  • the anchor head comprises a longitudinal extension as a bearing for the connector.
  • the anchor head can be designed by a cable block in which the cable is firmly attached at a front end of the anchor head and the extension can be a sleeve or tube extending from that cable block at a back end of the anchor head.
  • the extension may extend around the cables that end in the cable block.
  • the connector comprises an elongated tubular shape.
  • the connector is designed as a sleeve, nut or tube that is slidably arranged around the anchor head.
  • the tubular connector can slide along an extension of the anchor head.
  • the tubular connector sits on the extension in a form fit which allows the connector to slide longitudinally but prevents the connector from moving radially relative to the anchor head.
  • the anchor head or its extension and the tubular connector are of cylindrical shape.
  • the tubular connector sits on the outer contour of the extension and can rotate thereon. This design facilitates the position of the anchor head, the connector and the construction socket relative to each other and avoids high stresses on these elements during the stressing process of the cable anchoring system.
  • an outer diameter of the extension may be smaller than the inner diameter of the opening by as much as to leave a radial gap between the extension and the opening when the anchor head is located in the opening.
  • the radial dimension of the gap corresponds to the thickness of the connector engaging between the extension and the opening.
  • the connector perfectly fills the gap and prevents radial movements of the anchor head within the opening.
  • the diameters are designed such that the outer thread of the connector automatically engages with the inner thread of the opening when the connector is screwed into the construction socket.
  • the inner thread is at least arranged at the entry end of the opening and may extend longitudinally towards a bottom end of the opening.
  • the outer thread of the connector may be arranged at least at the connector section oriented towards the construction socket.
  • the outer thread may extend along the full length of the connector.
  • an outer contour of the radially extending shoulder of the anchor head may comprise an approximate form fit with an inner contour of the opening of the construction socket.
  • the outer diameter of the cable block of the anchor head may correspond to the inner diameter of the opening of the construction socket.
  • the stop of the connector is realized by a radially arranged edge at an end of the connector oriented towards the construction socket.
  • the opposite end of the connector is oriented towards the cable.
  • the radial edge can be defined as the stopper edge of the connector.
  • the opening of the construction socket comprises a bottom that serves as abutment for the anchor head in direction towards the construction socket.
  • the cable block of the anchor head can be pulled into the opening until its front end hits the opening bottom. In this position the anchor head is in a cable tensioning position providing the strongest stressing of the cable. After adjusting the connector stop in the opening to block the anchor head at its radial shoulder the cable anchoring system in a cable tensioning mode with its maximum cable stressing capacity.
  • the anchor head does not need to be inserted all the way to the bottom of the construction socket opening.
  • the connector stop can block the anchor head in a cable tensioning position with some distance towards the bottom, which corresponds to a lesser stressing of the cable.
  • the construction socket includes a clevis coupler for coupling the system to the construction.
  • the clevis coupler comprises a gusset flange, a fork element, and a connection pin.
  • the gusset flange is anchored in the ground or mounted to a structure.
  • the fork element is extended from the opening section of the construction socket.
  • the gusset flange and the forks of the fork element have holes for assembling the clevis coupler. When the forks embrace the gusset flange all holes are aligned and the connection pin is inserted into the passage created by the holes to assemble the clevis coupler.
  • the present invention further provides a civil engineering construction comprising at least one cable, which is attached with at least one end to the construction by a cable anchorage system as described above.
  • the civil engineering construction is set up quickly by using the cable anchoring system.
  • the statics of the structure can be fine-tuned in a simple manner by taking advantage of the tensioning method according to the invention.
  • the cable anchoring system of the present invention is much more compact in length compared with existing solutions.
  • Each of the adjustable elements of the system are located inside each other when the system is in a cable tensioning mode.
  • they can be arranged relative to each other in a telescopic manner for the tensioning process. They do not need to be aligned one after the other as in the prior art concept.
  • the cable anchoring system of the invention is much more robust because tensile and bending stresses occurring during the tensioning are mostly affecting the construction socket, which is the widest and therefore strongest element of the system.
  • the critical location of high fatigue stress in the system is not located on a threaded surface but mostly on a plain surface free of indentations, permitting the use of simpler machining and more cost-effective material for manufacturing.
  • the cable anchoring system can be applied to any tendon technology because the interface between the anchor head and the construction socket is a simple bearing interface and not a complex interface structure.
  • Fig. 1 a schematic longitudinal view of a cable anchoring system according to the present invention with a stressing unit in a pre-anchoring mode
  • Fig. 2 a schematic longitudinal view of the cable anchoring system according to Figure 1 during a cable stressing process
  • Fig. 3 a schematic longitudinal view of the cable anchoring system according to Figures 1 and 2 in a cable tensioning mode
  • Fig. 4 a schematic longitudinal view of the cable anchoring system according to Figures 1 to 3 after disassembly of the stressing system
  • Fig. 5 a schematic longitudinal view of the cable anchoring system according to Figures 1 to 4 at an earlier stage before installation of the stressing system and insertion of the anchor head in the construction socket.
  • Figures 1 - 5 illustrate a cable anchoring system according to the present invention in different stages during a tensioning process for stressing a cable 1 by the tensioning method according to the invention using a stressing unit.
  • the cable 1 is schematically represented by several cable threads.
  • the cables used for civil engineering constructions comprise a plurality of strands intertwined to realize a heavy-duty cable for holding large constructions like bridges, towers and the like as explained before.
  • the cable anchoring system comprises an anchor head 2 mounted to the cable 1 , a construction socket 3 attachable to the construction (not shown) and a connector 4 for connecting or coupling the anchor head 2 to the construction socket 3.
  • the construction socket 3 comprises an opening 5 for at least partially receiving the anchor head 2.
  • the elements of the cable anchoring system are aligned in direction of a longitudinal axis of the system and the cable, respectively. Further, in the illustrated embodiment the elements have a cylindrical shape and are generally symmetrical around the longitudinal axis. However, in other embodiments of a system according to the present invention the elements may have a different shape.
  • the construction socket 3 is for example fixed to a ground foundation or a structure (not shown) by a clevis coupler comprising a gusset flange 100, a clevis fork 101 and a connection pin 102.
  • the clevis coupler functions as known from the state of the art for example as describe above.
  • the cable anchoring system is shown in a pre-tensioning mode, wherein the anchor head 1 is not inserted into the opening 5.
  • the anchor head 1 is located just above the opening 5. However, it could be located at a larger distance towards the opening 5 depending on the cable conditions prior to stressing the cable.
  • the opening 5 comprises an internal thread 6 at an upper end of the construction socket, which represents an entry end for receiving the anchor head 2.
  • the internal thread extends over about 1/4 or 1/3 of the longitudinal length of the opening. However, the internal thread may cover a larger portion of the opening.
  • the connector 4 has an elongated tubular shape and is realized as an elongated sleeve or nut. It comprises an external thread 7 for engaging with the internal thread 6 of the opening 5, as will be described below.
  • the connector 4 is movably arranged along the anchor head 2 and detached from the construction socket 3.
  • the connector 4 provides a longitudinally adjustable stop 8 for the anchor head 2, as will also be explained below.
  • the longitudinal extension 9 may extend from the stressing bracket 204 to the flat surface 15 of the anchor head 2.
  • the stressing bracket 204 could be considered as a part of the stressing jack 201 .
  • jacks hydraulic cylinders
  • the outer diameter of the extension 9 corresponds to the inner diameter of the connector 4.
  • the extension 9 can serve as a bearing for the connector 4 and the connector 4 can slide and rotate on the extension 9 of the anchor head 2.
  • the anchor head 2 comprises a radially extending shoulder 10 for interacting with the stop 8 of the connector 4.
  • the shoulder is provided by a radial step or edge at a front section of the anchor head 2, for example at the anchorage block.
  • An outer contour of the front section of the anchor head 2 stretching from the shoulder 10 to the front end of the anchor head comprises a form fit with an inner contour of the opening. That means, the outer diameter of the anchor head 2 corresponds to the inner diameter of the opening 5.
  • a stressing unit for stressing the cable 1 and thereby pulling the anchor head 2 towards the construction socket 3 is attached to the anchor head 2 and the construction socket 3.
  • the stressing unit comprises a socket bracket 200 attachable to the construction socket 3, at least one stressing jack 201 attachable to the anchor head 2 or to an extension 9 and stressing bars 202.
  • the socket bracket 200 may for example be attached to the construction socket 3 by providing a bracket pin 203 through the connection pin 102 of the clevis coupler. Additionally or alternatively, the socket bracket 200 may for example be attached to the gusset flange 100 or structural elements of the construction socket 3.
  • the at least one stressing jack 201 is coupled with the rear end of the extension 9 of the anchor head 2.
  • the stressing jack 201 may for example be connected to the extension 9 via a stressing bracket 204 as shown in figure 1 .
  • the at least one stressing jack 201 is slidably arranged on the stressing bars 202, wherein the stressing bars serve as a guide for the longitudinal movement of the stressing jack 201 and the anchor head 2, respectively.
  • a protection pipe 11 is located outside the stressing unit above the stressing jack 201 .
  • the protection pipe 11 may slide over the cable anchoring system once the stressing unit is detached from the anchor head and the construction socket as shown in figure 4. For example, after tensioning the cable and when the cable anchoring system is in a cable tensioning mode.
  • FIG 2 the cable anchoring system is shown after the stressing unit pulled the anchor head 2 into the opening 5 of the construction socket 3 by pushing the stressing jack 201 along the stressing bars 202 towards the socket bracket 200.
  • the front end of the anchor head 2 is moved all the way to a bottom 12 of the opening 5 and abuts against it.
  • the form fit between the inner contour of the opening 5 and the outer contour at the shoulder 10 of the anchor head 2 prevents radial movement of the anchor head 2 in the opening 5.
  • the anchor head 2 simply slides along the inner wall of the opening 5 and is prevented from misalignment in the opening 5.
  • the connector 4 slides upwards along the extension 9 of the anchor head 2 during the cable stressing process and remains outside the opening 5 of the construction socket 3, while the anchor head 2 enters the opening 5.
  • the connector 4 sits on the internal thread 6 at the entry end of the opening.
  • the anchor head 2 travelled a large distance towards the bottom 12 for tensioning the cable 1 and is now in the cable tensioning position as shown in Figure 2.
  • the travelled distance of the anchor head 2 is much larger as a stressing distance allowed in any of the prior art concepts.
  • the tensioning process does not create any bending or rotating stresses acting on the anchor head because all elements are aligned in longitudinal direction during the entire cable stressing.
  • an outer diameter of the extension 9 is smaller than the inner diameter of the opening 5 and leaves a radial gap 13 between the extension 9 and the opening 5.
  • the radial dimension of the gap 13 corresponds to the radial thickness of a wall of the connector 4 engaging between the extension 9 and the opening 5.
  • FIG 3 the cable anchoring system is shown in a cable tensioning mode.
  • the external thread 7 of the connector 4 has been screwed into the internal thread 6 of the opening 5.
  • the connector 4 has an accessible tip 14 for turning the connector 4 around its longitudinal axis.
  • the connector 4 may have attachment points, like holes or small protrusions, at its back end for attaching a rotator device.
  • the stop is realized by a radially arranged stopper edge corresponding to the front end of the connector 4 oriented towards the construction socket 3.
  • the connector 4 is inserted into the opening 5 until this stop 8 abuts against the shoulder 10 of the anchor head 2.
  • the connector 5 is in a snug fit with the inner wall of the opening 5 and the outer contour of the extension 9, and closes the radial gap 13.
  • the anchor head 2 is tightly secured in the construction socket 3 in its cable tensioning position.
  • the socket bracket 200, the at least one stressing jack 201 and the stressing bars 202 can be detached from the cable anchoring system.
  • the protection pipe 11 may be pushed over the anchor head 2 and the construction socket 3 protecting the cable anchoring system from weathering and vandalism.
  • the anchor head 2 In the cable tensioning mode of the cable anchoring system the anchor head 2, the connector 3 and the opening 5 of the construction socket 4 are overlapping in axial and/or radial direction such as in a retractable telescopic manner.
  • the cable anchoring system has a compact and robust design, wherein plain surface absorbs a large portion of the stressing forces in the system. This reduces the amount of material and resources required for producing the system and provides a strong foundation for the stressed cable.
  • the anchor head In the cable tensioning mode of the cable anchoring system as shown in Figures 1 -3 the anchor head is pulled all the way to the bottom of the opening.
  • the cable tension required for the construction may not require that the cable is stressed that much.
  • the anchor head can be pulled only partially into the opening to provide lesser cable tension. Consequently, the connector is screwed a shorter distance into the opening until the stop hits the shoulder of the anchor head. The traction force of the cable will securely keep the anchor head at the stop.
  • the adjustable stop can be arranged according to a required tension of the cable.
  • Figures 4 and 5 show an example where the cable anchorage system without stressing unit (e.g., stressing jack and stressing bar), for instance the stressing unit is removed after anchorage has been established ( Figure 4) or before anchorage is begun ( Figure 5).
  • stressing unit e.g., stressing jack and stressing bar
  • the cable anchoring system can be coupled to a structure or ground foundation in other ways than using a clevis coupling, and the cable anchoring system can be tensioned using other stressing units than illustrated in the example embodiment. Also, the cable anchoring system does not need to be oriented in the illustrated up/down configuration.

Abstract

L'invention concerne un système d'ancrage de câble pour ancrer un câble (1) à une construction qui comprend une tête d'ancrage (2) montée sur le câble (1), une douille de construction (3) pouvant être fixée à la construction et un raccord (4) pour relier la tête d'ancrage (2) à la douille de construction (3). La douille de construction (3) comprend une ouverture (5) ayant un filetage interne (6) pour recevoir au moins partiellement la tête d'ancrage (2), lorsque le système est mis sous tension par une unité de contrainte. Le raccord (4) comprend un filetage externe (7) et est disposé de façon mobile le long de la tête d'ancrage (2) pour fournir une butée réglable longitudinalement (8) par mise en prise avec le filetage interne (6) de l'ouverture (5) de la douille de construction (3). La tête d'ancrage (2) comprend un épaulement (10) s'étendant radialement, qui vient en butée contre la butée (8) du raccord (4), lorsque le raccord (4) est ajusté dans une position de tension de câble au niveau de la douille de construction (3).
PCT/EP2022/057997 2022-03-25 2022-03-25 Système et procédé d'ancrage de câble WO2023179878A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/057997 WO2023179878A1 (fr) 2022-03-25 2022-03-25 Système et procédé d'ancrage de câble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2022/057997 WO2023179878A1 (fr) 2022-03-25 2022-03-25 Système et procédé d'ancrage de câble

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WO2023179878A1 true WO2023179878A1 (fr) 2023-09-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742737A (en) * 1953-05-12 1956-01-04 Donovan Henry Lee Improvements in and relating to bar gripping means for use in the production of prestressed concrete
JPS6164958A (ja) * 1985-08-01 1986-04-03 新構造技術株式会社 Ｐｃ鋼材の緊張連結方法
FR2791373A1 (fr) * 1999-03-23 2000-09-29 Freyssinet Int Stup Dispositif pour fixer un cable de structure a un element de construction
US6681431B2 (en) 2000-03-13 2004-01-27 Freyssinet International (Stup) Adjustable anchor bearing a civil engineering structure
EP3344817B1 (fr) 2015-08-31 2019-11-13 VSL International AG Système d'ancrage de câble

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB742737A (en) * 1953-05-12 1956-01-04 Donovan Henry Lee Improvements in and relating to bar gripping means for use in the production of prestressed concrete
JPS6164958A (ja) * 1985-08-01 1986-04-03 新構造技術株式会社 Ｐｃ鋼材の緊張連結方法
FR2791373A1 (fr) * 1999-03-23 2000-09-29 Freyssinet Int Stup Dispositif pour fixer un cable de structure a un element de construction
US6681431B2 (en) 2000-03-13 2004-01-27 Freyssinet International (Stup) Adjustable anchor bearing a civil engineering structure
EP3344817B1 (fr) 2015-08-31 2019-11-13 VSL International AG Système d'ancrage de câble

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