EP3921494A1 - Vorrichtung und verfahren zum entspannen einer spannlitze - Google Patents
Vorrichtung und verfahren zum entspannen einer spannlitzeInfo
- Publication number
- EP3921494A1 EP3921494A1 EP20705296.0A EP20705296A EP3921494A1 EP 3921494 A1 EP3921494 A1 EP 3921494A1 EP 20705296 A EP20705296 A EP 20705296A EP 3921494 A1 EP3921494 A1 EP 3921494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anchoring
- tensioning
- unit
- strand
- tower
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/16—Prestressed structures
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2230/00—Manufacture
- F05B2230/70—Disassembly methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Definitions
- the invention relates to a device and a method for relaxing a tensioning strand, in particular a tensioning strand of a prestressed tower, preferably a prestressed concrete tower of a wind energy installation.
- the invention further relates to a method for dismantling a prestressed tower and the use of a device and a method for relaxing a tensioning strand.
- tendons are often used to prestress the structures.
- externally guided tendons are also used, which do not run within concrete components, for example in the interior of encased pipes, but adjoining or adjacent to the concrete components.
- Externally guided tendons are used in particular for towers that are made of concrete or have concrete.
- towers can be made of in-situ concrete or assembled from precast concrete parts.
- Tendons are often used in such concrete towers to prestress the tower in the longitudinal direction.
- a tendon usually comprises several tendon strands and can therefore also be referred to as a tendon strand package.
- a tendon can for example have up to 20 tendon strands, for example 15 tendon strands.
- a tension strand usually comprises several wires.
- a tensioning strand can be constructed with 7 wires, with six wires wound around a central wire.
- a tension strand can also comprise more or less than 7 wires.
- the wires of a tension cord are usually arranged within a sheath of the tension cord, which can comprise or consist of plastic, in particular HDPE, for example.
- a lubricant such as, for example, grease, is generally arranged within the tendon sheath and around the wires and between the wires.
- the individual wires can preferably made of solid material, usually metal, in particular steel, and for example have a diameter of a few millimeters, for example 5-6 mm.
- the tendon strands of a tendon generally run parallel over a large part of their length and are often anchored at their ends via common anchor devices.
- the tendons are usually anchored with the tendons at the tower head and the tower foundation and then provided with a corresponding prestressing force.
- the externally guided tendons are often arranged in a ring and usually run inside the tower. The tendon strands of the tendons are then usually accessible from inside the tower.
- Prestressed concrete towers are often used in wind turbines.
- a nacelle with an aerodynamic rotor is placed on the tower.
- the tension cords may suddenly snap back or other uncontrolled movements of the tension cords when loosening or separating the tension cords. On the one hand, this can pose considerable dangers for people and the structures and, on the other hand, cost risks arise.
- a device for relaxing a tensioning strand in particular a tensioning strand of a prestressed tower, preferably a prestressed concrete tower of a wind turbine, the device comprising a first anchoring unit with a first tensioning strand receptacle for a first section of the tensioning strand, a second anchoring unit with a second Tension cord receptacle for a second section of the tension cord, a lifting unit which is designed to change a distance between the first and second anchoring unit.
- the device described here is used to relax tension cords, in particular tension cords that are under tension.
- the tensioning strands to be relaxed can, in particular, be part of a tensioning package or a tendon.
- the tension forces occurring in tendons, in particular tendons for pre-tensioning concrete towers of wind energy systems can be at least 50 kN or at least 75 kN or at least 100 kN or at least 120 kN.
- the tension forces occurring in tendons, in particular tendons for prestressing concrete towers of wind energy systems can be, for example, over or up to 150 kN or over or up to 175 kN or over or up to 200 kN or over or up to 250 kN.
- the tendon strands that occur in tendons, in particular tendons for prestressing concrete towers of wind energy systems can be, for example, at least 5 cm or at least 10 cm or at least 50 cm or at least 75 cm.
- the tendon strands that occur in tendons, in particular tendons for prestressing concrete towers of wind turbines can for example be over or up to 80 cm or over or up to 100 cm or over or up to 150 cm or over or up to 175 cm or over or up to 200 cm or above or up to 250 cm.
- the device has two anchoring units which are spaced from one another. These anchoring units are part of the device described here for Relaxation of tension cords and serve to temporarily accommodate sections of a tension cord to be relaxed. These anchoring units of the device for slackening tensioning strands are therefore to be distinguished from the anchoring devices with which the tendons, also known as tensioning strand packages, are anchored to the foundation and / or to the tower head, for example of a tower of a wind turbine, for the regular operating time of the tower.
- the distance between the first and second anchoring unit of the device for relaxing tensioning strands preferably extends parallel to a longitudinal axis of the tensioning strand that is to be relaxed.
- the longitudinal axis of the tension cord can also be referred to as the tension cord axis.
- the first and second anchoring units each have a first and a second tendon mount. A first or second section of the tensioning cord can be arranged and received in these tensioning strand mountings.
- the tensioning strand receptacles preferably have a longitudinal axis which runs parallel to or identical to the longitudinal axis of the tensioning strand to be relaxed.
- the first and second sections of the tensioning strand are preferably spaced apart from one another by essentially the same distance as the two anchoring units.
- the device also has a lifting unit.
- the lifting unit is preferably connected to the first and the second anchoring unit.
- the lifting unit serves to change the distance between the first and the second anchoring unit.
- the tendon strand receptacles of the anchoring units serve in particular to receive the tendon strand sections in the anchoring units and to anchor them there.
- Anchoring by means of the anchoring units is understood here in particular as a, preferably detachable and / or temporary, fastening that prevents relative displacement between the tensioning strand section and the anchoring unit, in particular along a direction of the tensioning strand axis, in particular when high forces are applied, which counteract the applied tensioning forces correspond to or exceed them.
- the inclusion and anchoring of the tensioning strand sections in the tensioning strand receptacles of the anchoring units also has the advantage that when the tensioning cord is separated between the anchoring units, only relatively small parts of the tensioning cord, namely the length of the tensioning cord between the two
- Anchoring units are subject to movement due to the residual tension in the tendon strand during separation. This can also reduce risks and increase security.
- all tensioning strands of a tensioning package and / or all tensioning strands of all tendons of a prestressed concrete tower can be relaxed and separated by means of the device, whereby the separation of individual tensioning strands can take place one after the other.
- the lifting unit is designed to increase and / or decrease the distance between the first and second anchoring unit.
- a reduction in the distance between the first and second anchoring units can lead to relaxation of the tensioning wire between the two anchoring units.
- An increase in the distance between the first and second anchoring units can in particular lead to relaxation of the tensioning wire in areas outside the device, that is to say beyond the anchoring units.
- the device is used to initially reduce the distance between the first and second anchoring units in order to relax the tensioning wire between the two anchoring units and to be able to separate it there. It is then preferred to increase the distance between the first and second anchoring units in order to relax the now separated tensioning wire in the areas outside the device, that is to say for example above and below the anchoring units.
- the tension cord is preferably already completely relaxed so that there are no uncontrolled movements of the separate tension cord. It is further preferred that the lifting unit connects the first and second anchoring unit and / or is arranged between the first and second anchoring unit.
- a preferred development is characterized in that the lifting unit is designed as a hydraulic cylinder or as a screw jack. These arrangements and designs of the lifting unit have the advantage that such a unit is particularly suitable for applying the high forces required to increase the tensioning forces of the tensioning strands, for example from about 50 to about 250 kN per strand, when changing the distance between the two anchoring units overcome.
- the first anchoring unit is designed in two parts, and / or that the second anchoring unit is designed in two parts.
- the first tension wire holder is designed in two parts and / or that the second tension wire holder is designed in two parts.
- the first anchoring unit has a first anchor base and a first anchor plate and / or that the second anchoring unit has a second anchor base and a second anchor plate.
- a two-part design of the anchoring units and, in particular, of the tendon strand receptacles has the advantage that it is possible to facilitate receiving the tendon strand sections in the tendon strand receptacles of the anchoring units.
- a two-part design by means of an anchor base and an anchor plate represents a reliable and, at the same time, simple construction for this purpose.
- the tendon strand receptacle is preferably arranged in the center of the anchor base and / or the anchor plate.
- the first tendon support is preferably formed by the first anchor base and the first anchor plate and / or the second tendon support is formed by the second anchor base and the second anchor plate.
- first anchor plate is releasably attached to the first anchor base, preferably by means of a screw connection, and / or that the second anchor plate is releasably attached to the second anchor base, preferably by means of a screw connection.
- a detachable fastening of the anchor plate to the anchor base allows the anchoring units and preferably also the tendon strand receptacles to be opened easily, so that the inclusion of the tensioning wire in the tensioning wire holders is further simplified.
- the detachable fastening of the anchor plate to the anchor base can be done, for example, using fastening elements such as Allen screws.
- a plurality of fastening elements is preferably provided on both sides of a tensioning strand holder.
- a controlled and reliable anchoring can take place via such a screw connection between an anchor plate and the anchor base, in particular with an arrangement of fastening elements such as screws on both sides of the tensioning strand section to be received, for example via the torques to be applied to the screw connection.
- the first anchoring unit has a length, a width and a depth, the depth preferably being several times smaller than the width and / or the length, and / or the second anchoring unit having a length, a width and a depth Has depth, the depth preferably being many times smaller than the width and / or the length.
- the length of the first and / or the second anchoring unit is preferably orthogonal to a plane that is spanned by the width and depth.
- the width of the first and / or the second anchoring unit is preferably orthogonal to a plane spanned by the length and depth.
- the depth of the first and / or the second anchoring unit is preferably orthogonal to a plane spanned by the length and width.
- the length of the first and / or the second anchoring unit preferably extends in a direction parallel to the strand axis.
- the width and depth of the first and / or the second anchoring unit preferably extend in the direction orthogonal to the tendon strand axis.
- a small depth of the first and / or the second anchoring unit has the advantage that the first and / or the second anchoring unit can also be used in tight installation spaces.
- the depth is dimensioned such that it is smaller than a distance between two adjacent tensioning strands and / or is smaller than a distance between a tensioning strand and a tower wall, in particular an inner tower wall.
- the distance preferably extends orthogonally to a tensioning strand axis and can denote the distance between two adjacent tensioning strands in the normal installed and / or operating state or comprise an extended distance in which one tensioning strand is separated from an adjacent tensioning strand or several adjacent tensioning strands of a tensioning strand package was lifted, for example by means of an air cushion.
- the depth has a maximum of 10 cm, preferably a maximum of 5 cm, in particular a maximum of 4 cm.
- Another preferred training is characterized in that the first
- Anchoring unit has a first clamping unit, the first clamping unit preferably being arranged at least in sections in the first tensioning strand receptacle, and / or characterized in that the second anchoring unit has a second clamping unit, the second clamping unit preferably being arranged at least in sections in the second tensioning strand receptacle.
- the clamping units can preferably be designed as a clamping wedge, the clamping wedge preferably being designed to receive a tensioning wire.
- a longitudinal axis of the clamping wedge is preferably aligned parallel to the strand axis.
- the clamping units serve in particular to improve the anchoring of the tensioning cord arranged in the tensioning strand receptacles in the anchoring unit.
- the object mentioned at the beginning is achieved by a method for relaxing a tensioning strand, in particular a tensioning strand of a prestressed tower, preferably a prestressed concrete tower of a wind turbine, comprising: arranging a first section of the tensioning strand in a first tensioning strand receptacle and anchoring the first section of the Tensioning wire in a first anchoring unit, arranging a second section of the tensioning wire in a second tensioning wire receptacle and anchoring the second section of the tensioning wire in a second anchoring unit, changing a distance between the first and second anchoring unit by means of a lifting unit.
- the method described above can preferably be developed by increasing a distance between the tensioning wire and an adjacent tensioning wire and / or a tower wall, preferably by means of an air cushion. Furthermore, the method is preferably characterized by reducing the distance between the first and second anchoring unit.
- the reduction in the distance between the first and second anchoring unit is preferably a maximum of 3 cm, in particular a maximum of 1 cm.
- the distance between the first and second anchoring unit is preferably reduced to such an extent that the tensioning wire between the first and second anchoring unit is completely or almost completely relaxed.
- the method described above can furthermore preferably be developed by separating the tensioning cord between the first and second anchoring unit. It is further preferred that the method comprises increasing the distance between the first and second anchoring unit.
- An increase in the distance between the first and second anchoring unit is preferably a minimum of 10 cm, in particular a minimum of 50 cm.
- increasing the distance between the first and second anchoring units serves to reduce or eliminate the tension in the tensioning wire outside the device.
- the method preferably also comprises releasing the anchoring of the tendon strand sections in the anchoring units and removing the device.
- the object mentioned at the beginning is achieved by a method for dismantling a prestressed tower, preferably a prestressed concrete tower of a wind turbine, comprising: relaxing at least one tensioning strand, preferably several tensioning strands, in particular all tensioning strands, by means of a device described above and / or by means of a previously described method for relaxing a tensioning wire, removing the tensioning wire and / or tower segments.
- the above-mentioned object is achieved through the use of a previously described device for relaxing a tensioning strand of a prestressed tower, in particular of a prestressed tower of a wind turbine.
- a previously described device for relaxing a tensioning strand of a prestressed tower in particular of a prestressed tower of a wind turbine.
- FIG. 1 a schematic representation of a wind energy installation
- FIG. 2 a view of a first exemplary device for relaxing a
- FIG. 3 a view of the device according to FIG. 2 with a separate tension cord
- FIG. 4 a plan view of the device according to FIGS. 2 and 3;
- FIG. 5 a view of a further exemplary device for relaxing a
- FIG. 6 a schematic flow diagram of an exemplary method for
- the wind energy installation 100 has a tower 102 and a nacelle 104 on the tower 102.
- An aerodynamic rotor 106 with three rotor blades 108 and a spinner 110 is provided on the nacelle 104.
- the aerodynamic rotor 106 is caused to rotate by the wind during operation of the wind energy installation and thus also rotates an electrodynamic rotor or rotor of a generator, which is coupled directly or indirectly to the aerodynamic rotor 106.
- the electrical generator is arranged in the nacelle 104 and generates electrical energy.
- the pitch angles of the rotor blades 108 can be changed by pitch motors at the rotor blade roots of the respective rotor blades 108.
- the tower 102 is a prestressed concrete tower with externally guided tendons inside the tower 102, each with several tension strands.
- a device for tensioning tension cords can be used, as described for example in FIGS. 2 to 4 and in FIG. 5, a method according to FIG. 6 preferably being used.
- the exemplary embodiments of the device 200, 300 described here serve to relax tensioning strands 400 that are under tension, for example with tension forces S of about 50 kN to about 2r0 kN and / or tensioning strands of about 10 cm to about 250 cm.
- the device 200 shown in FIGS. 2 to 4 comprises a first anchoring unit 210 with a first tensioning strand receptacle 213 for a first section of the tensioning strand 400, a second anchoring unit 220 with a second tensioning strand receptacle 223 for a second section of the tensioning strand 400.
- FIG. 5 shows a further device 300 with a first anchoring unit 310 with a first tension cord receptacle 313 for a first section of the tension cord 400, a second anchoring unit 320 with a second tension cord receptacle 323 for a second section of the tension cord 400.
- the respective two anchoring units 210, 220, 310, 320 are spaced apart from one another.
- the distance A1 between the first and second anchoring units 210, 220, 310, 320 extends parallel to the longitudinal axis of the tensioning strand 400.
- the anchoring units 210, 220, 310, 320 are in the spaced a small distance A1, wherein the distance A1 has preferably already been reduced, so that the tensioning wire between the anchoring units 210, 220, 310, 320 is already completely or largely relaxed.
- the tensioning strand 400 is separated, the anchoring units 210, 220 were removed from one another by means of the lifting unit 240 and are now spaced apart at a greater distance A2, so that the tensioning strand outside the device 200, in particular above the first anchoring unit 210 and below the second Anchoring unit 220, is relaxed.
- the tensioning strand receptacles 213, 223, 313, 323 also each have a longitudinal axis which runs parallel to or identical to the longitudinal axis of the tensioning strand 400 to be relaxed.
- Both anchoring units 210, 220, 310, 320 each have a clamping unit in the form of clamping wedges 214, 224, 314, 324.
- the longitudinal axes of the clamping wedges 214, 224, 314, 324 are also aligned parallel to the tendon axis.
- the clamping wedges 214, 224, 314, 324 serve to improve the anchoring of the tensioning cord 400 arranged in the tensioning strand receptacles 213, 223, 313, 323 in the anchoring units 210, 220, 310, 320.
- the anchoring units 210, 220, 310, 320 with their tensioning strand receptacles 213, 223, 313, 323 are designed in two parts and each have an anchor base and one
- the tendon strand sections can be easily received in the tendon strand receptacles 213, 223, 313, 323 of the anchoring units 210, 220, 310, 320.
- the tendon strand receptacle 213, 223, 313, 323 is arranged in the middle of the anchor base 212, 222, 312, 322 and the anchor plate 212, 222, 312, 322.
- the anchor plate 212, 222, 312, 322 is releasably attached to the anchor base 212, 222, 312, 322 by means of a screw connection via a plurality of Allen screws 230, which are provided on both sides of the tensioning strand receptacle 213, 223, 313, 323.
- the anchoring units 210, 220, 310, 320 and tensioning wire mounts 213, 223, 313, 323 can be opened easily and controlled and reliable anchoring can take place, for example via the torques to be applied to the screw connection.
- the anchoring units 210, 220, 310, 320 each have a length L, a width B and a depth T, the depth T being many times smaller than the width B and the length L. It is particularly preferred that the depth T has a maximum of 10 cm, preferably a maximum of 5 cm, in particular a maximum of 4 cm.
- a small depth of the anchoring units 210, 220, 310, 320 has the advantage that the anchoring units 210, 220, 310, 320 can be inserted between adjacent tensioning strands and / or between the tensioning strand and the inner wall of the tower, with the tensioning strand 400 to be relaxed from adjacent tensioning strands or the inner wall of the tower can be lifted off beforehand, for example by means of an air cushion.
- a Anchoring is a fastening that prevents a relative displacement between the tensioning strand sections and the respective anchoring unit 210, 220, 310, 320, in particular along a direction of the tensioning strand axis, especially when high forces are applied, which correspond to the applied tensioning forces S or can exceed them.
- the device 200 also has a lifting unit 240 in the form of a screw jack 249.
- the lifting unit 340 of the device 300 is designed as a hydraulic cylinder 349.
- the screw jack 249 according to FIGS. 2 to 4 has two threaded spindles 241, 242, which are connected to the second anchoring unit 220 via axial bearings 244 and run through nuts 243 firmly connected to the first anchoring unit 210.
- the distance A1, A2 between the anchoring units 210, 220 can be changed.
- the hydraulic cylinder 349 according to FIG. 5 has two hydraulic cylinders 341, 342, which are connected to the first and second anchoring units 310, 320. By controlling, in particular extending and retracting the hydraulic cylinders 341, 342, the distance A1 between the anchoring units 310, 320 can be changed.
- the lifting units 240, 340 are designed to change a distance A1, A2 between the first and second anchoring unit 210, 220, 310, 320, in particular to enlarge and / or reduce it.
- the lifting units 240, 340 are arranged between the first and second anchoring units 210, 220, 310, 320 and are connected to the first and second anchoring units 210, 220, 310, 320.
- the lifting units 240, 340 are suitable for applying the necessary high forces to the tensioning forces of the tensioning strand 400, for example from about 50 to about 250 kN per strand, when changing the distance A1, A2 between the two anchoring units 210, 220, 310, 320 to overcome.
- a reduction in the distance between the first and second anchoring units 210, 220, 310, 320 to the distance A1 leads to relaxation of the tensioning strand 400 between the two anchoring units 210, 220, 310, 320.
- An increase in the distance between the first and second anchoring units 210, 220, 310, 320 at the distance A2 leads to relaxation of the tensioning strand 400 in areas outside the device 200, 300, that is to say beyond the anchoring units 210, 220, 310, 320.
- the device 200, 300 is first used to first reduce the distance between the first and second anchoring units 210, 220, 310, 320 to the distance A1 in order to relax the tensioning strand 400 between the two anchoring units 210, 220, 310, 320 , as shown in particular in FIG.
- the tension strand 400 can then be separated. After the separation, the distance between the first and second anchoring units 210, 220, 310, 320 is increased to the distance A12, around the now separated tensioning strand 400 in the areas outside the device 200, 300, i.e. for example above and below the anchoring units 210, 220, 310, 320, as shown in particular in FIG.
- the tension cord 400 is preferably already completely relaxed so that no uncontrolled movements of the separate tension cord 400 occur.
- a method 1000 for relaxing a tensioning wire 400 which can proceed as follows.
- a distance between the tensioning strand and an adjacent tensioning strand and / or a tower wall is preferably increased 1004, preferably by means of an air cushion.
- a change 1003 of a distance between the first and second anchoring units 210, 220, 310, 320 takes place by means of a lifting unit 240, 340, in particular a reduction 1004 of the distance between the first and second anchoring unit 210, 220, 310, 320.
- the reduction in the distance between the first and second anchoring unit 210, 220, 310, 320 is preferably a maximum of 3 cm, in particular a maximum of 1 cm.
- the distance between the first and second anchoring units 210, 220, 310, 320 is preferably reduced to such an extent that the tensioning wire 400 between the first and second anchoring units 210, 220, 310, 320 is completely or almost completely relaxed.
- the tensioning strand 400 is then separated 1005 between the first and second anchoring units 210, 220, 310, 320 and then the distance between the first and second anchoring units 210, 220, 310, 320 is increased 1006 second anchoring unit 210, 220, 310, 320 is preferably a minimum of 10 cm, in particular a minimum of 50 cm.
- the anchoring of the tensioning strand sections in the anchoring units 210, 220, 310, 320 is loosened 1007 and the device 200, 300 is removed.
- a method for dismantling a prestressed concrete tower 102 of a wind turbine 100 is preferably obtained if at least one tensioning strand is relaxed 400, preferably several tension cords, in particular all tension cords, by means of the device 200, 300 and / or by means of the method 1000 for relaxing a tension cord 400, the tension cord 400 or the tension cords are removed, in particular after separation and / or tower segments are removed.
- prefabricated parts of a concrete tower can be placed on top of one another, with or without joint connection means. The prefabricated parts can then, if necessary after separating the joints, be successively removed for dismantling the tower.
- the devices 200, 300 allow a tension cord 400 between the two respective anchoring units 210, 220, 310, 320 to be relaxed and separated safely and in a controlled manner, and then also the tension cord outside the devices 200, 300, in particular outside the two anchoring units 210, 220, 310, 320, relax. In this way, the risks and costs associated with the dismantling of externally prestressed structures, in particular concrete towers of wind turbines, can be significantly reduced and safety increased.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
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- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102019102688.1A DE102019102688A1 (de) | 2019-02-04 | 2019-02-04 | Vorrichtung und Verfahren zum Entspannen einer Spannlitze |
PCT/EP2020/052653 WO2020161091A1 (de) | 2019-02-04 | 2020-02-04 | Vorrichtung und verfahren zum entspannen einer spannlitze |
Publications (1)
Publication Number | Publication Date |
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EP3921494A1 true EP3921494A1 (de) | 2021-12-15 |
Family
ID=69591599
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20705296.0A Pending EP3921494A1 (de) | 2019-02-04 | 2020-02-04 | Vorrichtung und verfahren zum entspannen einer spannlitze |
Country Status (5)
Country | Link |
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US (1) | US20220010577A1 (de) |
EP (1) | EP3921494A1 (de) |
CN (1) | CN113423903A (de) |
DE (1) | DE102019102688A1 (de) |
WO (1) | WO2020161091A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102019119127A1 (de) | 2019-07-15 | 2021-01-21 | Wobben Properties Gmbh | Verfahren zur Demontage eines Turms einer Windenergieanlage |
FR3115302B1 (fr) * | 2020-10-21 | 2022-10-14 | Soletanche Freyssinet | Dispositif d’absorption de l’énergie libérée par la détension d’un câble de structure |
DE102020130232A1 (de) * | 2020-11-16 | 2022-05-19 | Eduard Reisch | Verfahren für den Rückbau eines Turms |
CN113431366B (zh) * | 2021-06-30 | 2023-03-31 | 中国建筑第八工程局有限公司 | 用于夹片式锚具的拆卸装置及其使用方法 |
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JP2844877B2 (ja) | 1990-08-09 | 1999-01-13 | 松下電器産業株式会社 | 回転ヘッドシリンダーおよびその製造方法 |
DE19536700C2 (de) * | 1995-09-30 | 1999-07-15 | Dyckerhoff & Widmann Ag | Verfahren zum Spannen eines Zugglieds aus einer Mehrzahl von Einzelelementen |
DE10244016B4 (de) * | 2002-09-21 | 2009-10-29 | Paul Maschinenfabrik Gmbh & Co | Spannverfahren und Spannvorrichtung sowie Anordnung für die Herstellung vorgespannter Betonfertigteile geringer Länge |
FR2904637A1 (fr) * | 2006-08-02 | 2008-02-08 | Freyssinet Soc Par Actions Sim | Procede de demontage d'un cable tendu, systeme et dispositifs associes. |
US20130205686A1 (en) * | 2012-02-15 | 2013-08-15 | Mitsubishi Heavy Industries, Ltd. | Tower and wind turbine generator having the same |
DK2738322T3 (en) * | 2012-11-29 | 2016-04-18 | Siemens Ag | Tower construction |
DE102013221956A1 (de) * | 2013-10-29 | 2015-04-30 | Wobben Properties Gmbh | Litzenvorverkeilvorrichtung und ein Verfahren zum Herstellen von Spannglied-Festankern |
DE102017201907A1 (de) * | 2017-02-07 | 2018-08-09 | Dywidag-Systems International Gmbh | Verfahren und Vorrichtung zum Entspannen eines Spannelements |
CN206796171U (zh) * | 2017-05-03 | 2017-12-26 | 中交一公局第三工程有限公司 | 一种张拉设备及先张法预应力简支梁工作台 |
CN108589553A (zh) * | 2018-06-21 | 2018-09-28 | 柳州欧维姆工程有限公司 | 一种用于钢锚箱拉索张拉的工装装置及其张拉方法 |
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2019
- 2019-02-04 DE DE102019102688.1A patent/DE102019102688A1/de active Pending
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2020
- 2020-02-04 US US17/427,486 patent/US20220010577A1/en active Pending
- 2020-02-04 WO PCT/EP2020/052653 patent/WO2020161091A1/de unknown
- 2020-02-04 EP EP20705296.0A patent/EP3921494A1/de active Pending
- 2020-02-04 CN CN202080012738.3A patent/CN113423903A/zh active Pending
Also Published As
Publication number | Publication date |
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CN113423903A (zh) | 2021-09-21 |
US20220010577A1 (en) | 2022-01-13 |
WO2020161091A1 (de) | 2020-08-13 |
DE102019102688A1 (de) | 2020-08-06 |
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