EP3555369B1 - Procédé d'installation d'un élément de serrage dans un support de bloc d'ancrage, destiné notamment à la mise en oeuvre du procédé et combinaison d'un support avec un élément de serrage - Google Patents

Procédé d'installation d'un élément de serrage dans un support de bloc d'ancrage, destiné notamment à la mise en oeuvre du procédé et combinaison d'un support avec un élément de serrage Download PDF

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Publication number
EP3555369B1
EP3555369B1 EP17828876.7A EP17828876A EP3555369B1 EP 3555369 B1 EP3555369 B1 EP 3555369B1 EP 17828876 A EP17828876 A EP 17828876A EP 3555369 B1 EP3555369 B1 EP 3555369B1
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EP
European Patent Office
Prior art keywords
tensioning element
anchor block
holder
tensioning
strands
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17828876.7A
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German (de)
English (en)
Other versions
EP3555369A2 (fr
Inventor
Michael Bauer
Werner Brand
Hagen Keiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DYWIDAG-SYSTEMS INTERNATIONAL GmbH
Original Assignee
Dywidag Systems International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Publication of EP3555369A2 publication Critical patent/EP3555369A2/fr
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Publication of EP3555369B1 publication Critical patent/EP3555369B1/fr
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges

Definitions

  • the invention relates to a method for installing a tensioning element in an anchor block already fastened to a structure according to the preamble of claim 1.
  • Such a method is used, for example, in the erection of structures, such as cable-stayed bridges, which have a plurality of tendons, each of which in turn comprises a plurality of tensioning elements that are accommodated in a common jacket tube made, for example, of high-density polyethylene (HDPE) can.
  • the method is used to pull the tensioning elements into the duct and then anchor them in the anchor block.
  • HDPE high-density polyethylene
  • the tensioning elements used according to the invention can each comprise a strand formed from a plurality of wires.
  • the strand can be formed from seven steel wires.
  • the strands can be galvanized and / or coated with epoxy resin.
  • the strands can be encased in a protective sheath made, for example, of plastic, in particular polyethylene (PE).
  • PE polyethylene
  • the stranded wire can be coated with a corrosion protection material, for example wax or grease, which preferably essentially completely fills the space between the stranded wire and the protective jacket.
  • the bracket is usually attached to the free end of the tensioning element.
  • the central wire of the braid can be exposed and a so-called central wire clamp can be attached to it.
  • the free end of the central wire can also be plastically deformed to form an upsetting head on which the holder can engage in a form-fitting manner while the outer wires adjacent to the holder are removed.
  • a pull rope attached to the bracket is hauled in by means of a winch, so that the tensioning element is moved to the anchor block together with the bracket.
  • the tensioning element together with the bracket attached to it must still be pulled through the through opening and then the tensioning element must be attached to the anchor block.
  • the size of the bracket is limited, since it has to fit through the through opening of the anchor block together with the tensioning element. It is easy to see that this entails restrictions with regard to the stability of the fastening.
  • the pull rope has to be threaded through the respective passage opening again for each installation process, which makes the process more complex overall.
  • the holder does not need to be designed taking into account the dimensions of the through openings of the anchor block, since according to the invention only the section of the tensioning element arranged on the other side of the holder, i.e. the protrusion of the tensioning element, is passed through the through opening. This simplifies the installation process both in terms of the time required for its implementation and in terms of the personnel required for its implementation as well as in terms of the equipment required for its implementation.
  • the holder is moved to the anchor block by means of a pull rope.
  • both at the end facing the anchor block the holder and at the end of the holder facing away from the anchor block each have a pull rope, wherein a separate winch can preferably be assigned to both pull ropes.
  • a tensioning element starting position which can be located, for example, on the deck of the cable-stayed bridge or at the level of the foundation of a tower
  • the anchor block which is located, for example, in the pylon of the cable-stayed bridge or at level the spire can be located, for example a controlled back and forth movement in the duct of the tendon.
  • the winch assigned to the tensioning element starting position is operated in such a way that the tension ropes are essentially constantly under tension while the holder is moved to the anchor block.
  • a guide unit be attached to the free end of the tensioning element, at least while the holder is being moved to the anchor block.
  • the guide unit is connected to the pull rope, for example is detachably connected.
  • the connection can be formed, for example, by an eyelet which loosely surrounds the pull rope, so that it can be moved relative to the pull rope.
  • the releasability can for example be provided in the manner of a snap hook or the like.
  • the connection is formed by means of a clamp which can be fixed to the pull rope so that it cannot move relative thereto.
  • the holder be designed for attaching at least two clamping elements.
  • several tensioning elements can be moved from the tensioning element starting position to the anchor block in one operation. Care only has to be taken to ensure that each of the tensioning elements is inserted into the respectively assigned passage opening of the anchor block. However, this can be ensured, for example, by simple numbering or colored marking of the clamping elements.
  • the projections of the at least two clamping elements are of different lengths. This would make it possible to insert the tensioning elements one after the other into the associated through holes. This can be particularly advantageous in confined spaces.
  • the overhangs of the at least two clamping elements are of essentially the same length are. This makes it possible to simultaneously introduce the tensioning elements into the through openings of the anchor block and anchor them therein.
  • the bracket also helps simplify installation of the tensioning elements. You only need to insert the respective tensioning element into the recess from above through the substantially straight section of the upper opening of the recess and then to actuate the holding force generating device.
  • the protrusion of the clamping element required for carrying out the method according to the invention can emerge from the holder through one outlet opening, while the remaining length of the clamping element emerges from the other outlet opening.
  • the holding force generating device generates a holding force which holds the clamping element securely in the holder while the holder is moved together with the clamping element to the anchor block.
  • the holding force generating device comprises an engagement element which is adjustable relative to the base body and which is designed and intended to come into abutment engagement with the clamping element and to press it into abutment against a stationary wall section of the recess of the base body.
  • the engagement element can be formed, for example, by a stamp which is adjustable relative to the base body and which, in particular with the aid of a tool, can be adjusted by hand or by means of a power device.
  • the engagement element is formed by a surface section of a flexible element, for example a hose or a balloon, which can be filled and emptied hydraulically and / or pneumatically.
  • the holding force generating device can be designed to deflect the tensioning element from its straight course.
  • a length section of the tensioning element located between the two outlet openings is bent into an essentially double-S-shaped course. If the simple double-S-shaped course is not sufficient to generate the required holding force, a multiple double-S-shaped course can also be used. For this purpose, a corresponding number of engagement elements can be provided.
  • the base body further comprise a ceiling wall which covers the recess at least in sections, for example adjacent to the stationary wall section.
  • This ceiling wall can secure the clamping element positively against it, in an unintentional manner automatically from the Stepping out recess.
  • the bracket comprise at least two recesses.
  • the holder can comprise two such recesses, which are arranged essentially mirror-symmetrically with respect to the longitudinal direction of the holder.
  • a common holding force generating device can be assigned to the two recesses.
  • the common holding force generating device can comprise two engagement elements, each of which is intended to come into contact with one of the clamping elements, and which can be adjusted by means of a common adjusting device.
  • the common holding force generating device can comprise an engagement unit which can be pivoted or rotated on the base body about an axis running parallel to its height direction. Two sections of the engagement unit can each form an engagement element which is intended to come into contact engagement with one of the clamping elements.
  • the engagement between the holding force generating device and the tensioning element must be accomplished in a manner that prevents or prevents the risk of damage to the tensioning element or a part of the tensioning element, for example the protective jacket surrounding the strand This completely excludes danger, regardless of whether the holding force is generated by frictional engagement and / or by positive engagement.
  • the tensioning element in particular the protective sheath of the strand forming the actual tensioning element, is essentially only elastic deformed.
  • plastic deformation of the protective jacket could lead to crack formation, which could endanger the protection of the strand from corrosion due to the penetration of moisture through the cracks.
  • the surface of the engagement element provided for abutment engagement with the tensioning element could be formed at least in sections with a rough surface, with the individual retaining projections forming the surface roughness protruding from the base of the surface by a distance that is smaller than the thickness of the protective jacket.
  • the positive-locking component of the holding force can also be generated in that the surface of the engagement element provided for contact engagement with the tensioning element is provided with a coating which is adapted to the Surface of the clamping element is designed. Additionally or alternatively, however, it is also possible for the cover to be designed to be elastically deformable, so that it can adapt to the surface shape of the tensioning element. Furthermore, in order to increase the frictional contribution to the holding force, the coating can have a coefficient of static friction which is greater than that of the material from which the stamp is formed.
  • the surface of the base body, against which the tensioning element is pressed by means of the stamp can also be provided with a coating of at least one of the above-explained for the coating of the stamp Has properties.
  • Figure 1 is a cable-stayed bridge in which the method according to the invention can be used, generally designated 100. It comprises a bridge deck 102 on which, for example, traffic routes for motor vehicles and / or other vehicles and / or pedestrians can be arranged, and at least one pylon 104. A stay cable 110 runs between an anchor point 106 of the pylon 104 and an anchor point 108 of the bridge deck 102.
  • the stay cable bridge 100 can comprise a plurality of such stay cables and in the majority of cases also comprises.
  • Figure 1 only a single stay cable 110 is shown.
  • the stay cable 110 in turn comprises a plurality of strands, of which in Figure 1 For the sake of clarity, only three are shown, namely the strands 112, 114 and 116.
  • the strand 112 is already fully installed, i.e. it is anchored both in an anchor block 118 of the anchor point 106 and in an anchor block 120 of the anchor point 108. For this purpose, it penetrates through bores 118a and 120a of anchor blocks 118 and 120 and is held in them by means of wedges 122 and 124, respectively.
  • the strands 114 and 116 are in the process of being transported from an initial position 126, which is arranged in the vicinity of the anchor point 108, to the anchor point 106.
  • the two strands 114 and 116 are placed in a holder 128 and fastened to it by clamps (see also Figure 3 ). How the attachment of the strands 114 and 116 to the bracket 128 is accomplished is discussed below with reference to FIG Figure 3 will be explained in detail.
  • traction cables 130 and 132 are attached, which run over pulleys 134 to a first winch 136 and a second winch 138.
  • the fastening of the pull cords 130 and 132 to the longitudinal ends 128a and 128b of the holder 128 can be done, for example, by means of so-called swivels which have an axial joint.
  • Essential to the invention is the location at which the holder 128 is attached relative to the free ends 114a, 116a of the strands 114, 116. This location is chosen such that the distance d between the bracket 128 and the free ends 114a, 116a of the strands 114, 116 is greater than a free strand length, which is required to pass the strands through the through-holes 118b and 118c of the anchor block 118 (see Figure 2 ) and be able to anchor there by means of the wedges 122. In this way, the two strands 114 and 116 can be transported to the anchor point 106 until their free ends 114a and 116a are arranged directly in front of the anchor block 118.
  • the transport speed of the strands 114 and 116 is then reduced by appropriate control of the winches 136 and 138 in such a way that their free ends 114a and 116a can be threaded into the through-bores 118b and 118c by hand. If the free ends 114a and 116a protrude sufficiently from the rear of the anchor block 118, the winches 136 and 138 are stopped in order to enable the assembly personnel to anchor the strands 114 and 116 in the anchor block 118 by means of the wedges 122.
  • the clamping engagement between the bracket 128 and the strands 114 and 116 can be released so that the bracket 128 can be moved back to the starting point 126 by appropriately controlling the winches 136 and 138 in order to pick up the next pair of strands there.
  • guide units 140 and 142 are arranged at the free ends 114a and 116a of the strands 114 and 116 (see FIG Figure 2 ). These guide units 140 and 142 have the task of preventing the free ends 114a and 116a of the strands 114 and 116 from getting caught between already installed strands during transport to the anchor point 106 due to their protrusion 114b and 116b beyond the bracket 128. This danger is all the more so since the strands 112, 114 and 116 are received in a tube 144 which is arranged between the two anchor points 106 and 108 in order to protect the strands from external influences, in particular from corrosion.
  • the two guide units 140 and 142 are advantageously releasably connected to the pull rope 130, the corresponding connection points in FIG Figure 2 are only indicated schematically at 140a and 142a.
  • a first embodiment of a bracket 128 is shown. It comprises a base body 150 that is mirror-symmetrical with respect to a longitudinal axis A and has two elongated, upwardly open recesses 152 and 154, which are designed and intended to receive the strands 114 and 116.
  • the recesses 152 and 154 are delimited towards the longitudinal axis A by delimiting walls 152a and 154a and on their side facing away from the longitudinal axis A by webs 152b and 154b and by surfaces 152c and 154c, which are formed on punches 156 and 158. Furthermore, the strands 114 and 116 received in the recesses 152 and 154 rest on a surface 150a of the base body 150. Finally, the recesses 152 and 154 have front openings 152d and 152e or 154d and 154e on their two longitudinal ends.
  • the delimitation walls 152a and 154a, as well as the webs 152b and 154b, are attached to the base body 150 or formed in one piece with it in the illustrated embodiment.
  • FIG Figure 3 The openings through which the strands 114 and 116 can be inserted into the recesses 152 and 154 are shown in FIG Figure 3 with 153 or 155, their rectilinear section with 153a or 155a.
  • the holder 128 further comprises holding force generating means, by means of which the punches 156 and 158 act on the strands 114 and 116 in order to press them against the boundary wall in 152a and 154a.
  • the strands 114 and 116 are clamped between the boundary walls 152a and 154a on the one hand and the punches 156 and 158 on the other hand with a force that enables the strands 114 and 116 to be transported to the anchor point 106 by means of the holder 128 without the Litz wires 114 and 116 inadvertently detach themselves from the holder 128.
  • the holding force generating means 160 or 162 together with the respective punch 156 or 158 form holding force generating devices in the sense of the claims.
  • the holding force generating means 160 and 162 can be designed as mechanically or / and electromotive and / and electromagnetic and / or pneumatically and / or hydraulically actuated actuating units. Regardless of the type of actuating force generation, a transmission can also be provided which reduces an input movement of the respective actuating unit into an actuating movement of the punches 156 and 158.
  • the holding force generating means 160 and 162 can be formed by screw bolts, which are received in a threaded hole in the base body 150 and press against the punches 156 and 158.
  • the thread of the screw bolt serves the just mentioned reduction of the rotational input movement of the screw bolt into a translational adjusting movement of the screw bolt and thus acts as the gear.
  • the holding force generating means 160 and 162 are designed as inflatable tube elements, the surface sections of which acting on the strands 114 and 116 act as the punches 156 and 158.
  • a common actuating unit is assigned to both rams 156 and 158.
  • the punches 156 and 158 could be designed as cams which are arranged on the outer circumference of a disk, which is rotatably mounted on the base body 150 about an axis Z running orthogonally to the longitudinal axis A and to the transverse direction Q.
  • a single setting unit is sufficient to press both punches 156 and 158 simultaneously against the strands 114 and 116 by rotating the disk.
  • both the boundary walls 152a and 154a and the surfaces 152c and 154c of the punches 156 and 158 are curved.
  • the delimitation walls 152a and 154a have a double-S-shaped profile as seen in the direction of the longitudinal axis A.
  • the lateral offset, ie the offset in the transverse direction Q, in the exemplary embodiment shown is essentially the same size as the diameter D of the strands 114 and 116.
  • the base body 150 comprises a top wall 164, which in FIG Figure 3 is shown in dashed lines and is arranged in such a way that it covers those portions of the boundary walls 152a and 154a which are at the smallest distance from the longitudinal axis A.
  • the strands 114 and 116 can be attached to the bracket 128 as follows: First, as shown in Figure 3 for the strand 114 is shown, running in a straight line into the associated recess, here the recess 152 is inserted until they rest on the surface 150a of the base body 150. The strand 114 enters the recess 152 through the opening 152d and exits it again at the other end of the holder 128 through the opening 152e. The holding force generating means 160 are then actuated in such a way that the punch 156 is placed laterally against the strand 114 and this begins to press against the boundary wall 152a.
  • Figure 4 a second embodiment of a holder is shown, which is essentially according to the first embodiment Figure 3 corresponds. Therefore, in Figure 4 Similar parts are provided with the same reference numerals as in Figure 3 , but increased by the number 100.
  • the bracket 228 according to Figure 4 are only described below insofar as they differ from the holder 128 according to FIG Figure 3 differs, the description of which is otherwise expressly referred to.
  • the holder 228 differs from the holder 128 mainly in that a single holding force generating unit 260 is provided, which is rotatably mounted on the base body 250 about an axis X running parallel to the vertical axis Z.
  • the holding force generation unit 260 has two cams 260a and 260b which interact with the punches 256 and 258. Because of this arrangement, the punches 256 and 258 do not act as in the embodiment according to FIG Figure 3 from the outside to the inside, but from the inside to the outside.
  • the boundary walls 252a and 254a of the recesses 252 and 254, against which the punches 256 and 258 press the strands 214 and 216, are formed on parts of the base body 250 which are arranged on the side of the strands 214 and 216 facing away from the longitudinal axis A.
  • the webs 252b and 254b are arranged on the side of the strands 214 and 216 facing the longitudinal axis A.
  • the top wall 264 is also divided into two parts.
  • the rotation of the holding force generating unit 260 can be brought about in a manner known per se to the person skilled in the art. For this reason, a detailed description is not given here.
  • FIG 4 the state of the holding force generating unit 260, which enables the braid 216 to be inserted into the recess 254, is shown below the longitudinal axis A.
  • the two cams 260a and 260b are aligned on the longitudinal axis A.
  • the holding state is shown, according to which the strand 214 is pressed by the punch 256 against the delimitation wall 252a and thus under the top wall 264. This is made possible by rotating the holding force generating unit 260 by 90 ° about the axis X, so that the cam 260a assumes the position 260a '.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Joining Of Building Structures In Genera (AREA)

Claims (7)

  1. Procédé pour installer un élément de tension (114) dans un bloc d'ancrage (118) déjà fixé à un édifice, comprenant les étapes suivantes :
    • l'élément de tension (114) est fixé à un support (128),
    • le support (128) est déplacé vers le bloc d'ancrage (118),
    • l'élément de tension (114) est inséré dans une ouverture de passage (118b) du bloc d'ancrage (118), et
    • l'élément de tension (114) est ensuite fixé au bloc d'ancrage (118),
    caractérisé en ce que l'élément de tension (114) est passé à travers l'ouverture de passage (118), en ce que l'élément de tension est fixé au bloc d'ancrage au moyen de cales, et en ce que le support (128) est fixé à l'élément de tension (114) à une distance (d) d'une extrémité libre (114a) de l'élément de tension (114) à fixer au bloc d'ancrage qui est choisi de telle sorte que la longueur de la saillie (114b) de l'élément de tension (114) résultant de cette distance (d) sur le côté du support (128) tourné vers le bloc d'ancrage (118) est supérieure à la longueur d'une section de l'élément de tension (114) nécessaire pour insérer l'élément de tension (114) dans l'ouverture de passage (118b) du bloc d'ancrage (118) et pour fixer l'élément de tension (114) au bloc d'ancrage (118).
  2. Procédé selon la revendication 1,
    caractérisé en ce que l'élément de tension (114) comprend un toron formé d'une pluralité de fils, qui est de préférence entouré par une gaine de protection.
  3. Procédé selon la revendication 1 ou 2,
    caractérisée en ce que le support (128) est déplacé vers le bloc d'ancrage (118) au moyen d'une corde de traction (130, 132).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce qu'une unité de guidage (140) est fixée à l'extrémité libre (114a) de l'élément de tension (114), au moins pendant que le support (128) est déplacé vers le bloc d'ancrage (118).
  5. Procédé selon les revendications 3 et 4,
    caractérisé en ce que l'unité de guidage (140) est reliée à la corde de traction (130), par exemple est reliée de manière amovible (en 140a).
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisée en ce que le support (128) est adapté pour la fixation d'au moins deux éléments de tension (114, 116).
  7. Procédé selon la revendication 6,
    caractérisée en ce que les saillies (114b, 116b) desdits au moins deux éléments de tension (114, 116) sont dimensionnées pour avoir sensiblement la même longueur.
EP17828876.7A 2016-12-19 2017-12-15 Procédé d'installation d'un élément de serrage dans un support de bloc d'ancrage, destiné notamment à la mise en oeuvre du procédé et combinaison d'un support avec un élément de serrage Active EP3555369B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016225416.2A DE102016225416A1 (de) 2016-12-19 2016-12-19 Verfahren zum Installieren eines Spannelements in einem Ankerblock, Halterung, insbesondere zur Durchführung des Verfahrens und Kombination einer Halterung mit einem Spannelement
PCT/EP2017/083012 WO2018114664A2 (fr) 2016-12-19 2017-12-15 Procédé d'installation d'un élément de serrage dans un support de bloc d'ancrage, destiné notamment à la mise en oeuvre du procédé et combinaison d'un support avec un élément de serrage

Publications (2)

Publication Number Publication Date
EP3555369A2 EP3555369A2 (fr) 2019-10-23
EP3555369B1 true EP3555369B1 (fr) 2021-02-17

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EP17828876.7A Active EP3555369B1 (fr) 2016-12-19 2017-12-15 Procédé d'installation d'un élément de serrage dans un support de bloc d'ancrage, destiné notamment à la mise en oeuvre du procédé et combinaison d'un support avec un élément de serrage

Country Status (6)

Country Link
US (1) US10669680B2 (fr)
EP (1) EP3555369B1 (fr)
CA (1) CA3045223A1 (fr)
DE (1) DE102016225416A1 (fr)
ES (1) ES2864135T3 (fr)
WO (1) WO2018114664A2 (fr)

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CN112523085B (zh) * 2020-12-01 2022-08-16 柳州欧维姆机械股份有限公司 一种带有功能元件的拉索护套管及其施工方法
CN113027138B (zh) * 2021-03-19 2022-09-23 云南省建设投资控股集团有限公司 一种钢绞线穿插引导装置
CN113356062A (zh) * 2021-06-07 2021-09-07 湖北军龙钢业有限公司 一种钢绞线穿束机构

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US20190323184A1 (en) 2019-10-24
WO2018114664A2 (fr) 2018-06-28
ES2864135T3 (es) 2021-10-13
CA3045223A1 (fr) 2018-06-28
EP3555369A2 (fr) 2019-10-23
US10669680B2 (en) 2020-06-02
WO2018114664A3 (fr) 2018-08-16

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