EP3555369A2 - 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

Info

Publication number
EP3555369A2
EP3555369A2 EP17828876.7A EP17828876A EP3555369A2 EP 3555369 A2 EP3555369 A2 EP 3555369A2 EP 17828876 A EP17828876 A EP 17828876A EP 3555369 A2 EP3555369 A2 EP 3555369A2
Authority
EP
European Patent Office
Prior art keywords
holder
clamping element
anchor block
base body
recess
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.)
Granted
Application number
EP17828876.7A
Other languages
German (de)
English (en)
Other versions
EP3555369B1 (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.)
Filing date
Publication date
Application filed by Dywidag Systems International GmbH filed Critical Dywidag Systems International GmbH
Publication of EP3555369A2 publication Critical patent/EP3555369A2/fr
Application granted granted Critical
Publication of EP3555369B1 publication Critical patent/EP3555369B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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

Definitions

  • the invention relates to a method for installing a tensioning element in an anchor block, comprising the steps:
  • the clamping element is inserted into a through hole of the anchor block
  • Such a method is used for example in the construction of structures, such as cable-stayed bridges, which have a plurality of tendons, each of which in turn comprises a plurality of clamping elements, which are accommodated in a common cladding tube, for example, be made of high-density polyethylene (HDPE) can.
  • the method serves to pull the clamping elements in the cladding tube and then anchored in the anchor block.
  • the clamping elements used according to the invention can, as is known per se from the prior art, each comprise a strand formed from a plurality of wires.
  • the strand can be formed from seven steel wires.
  • the strands can be galvanized or / and coated with epoxy resin.
  • the strands can be enveloped by a protective sheath which is formed, for example, from plastic, in particular polyethylene (PE).
  • PE polyethylene
  • the stranded wire may be provided with a corrosion protection material, For example, wax or grease are coated, which preferably substantially completely fills the gap between the strand and the protective jacket.
  • the bracket is usually attached to the free end of the tension member.
  • the center wire of the strand can be exposed and attached to this a so-called center wire clamp.
  • the free end of the central wire can also be plastically deformed to form an upset head, on which the holder can engage in a form-fitting manner, while the outer wires of the holder are removed adjacent. Subsequently, a pulling cable attached to the holder is caught by means of a winch, so that the clamping element is moved together with the holder to the anchor block. Arrived at the anchor block there are two alternatives:
  • This object is achieved by a method of the generic type, in which the holder is attached to the clamping element at a distance which is selected such that the length of the resulting from this distance supernatant of the clamping element on the side facing the anchorage of the holder at least as great as the length of a portion of the tensioning element required for inserting the tensioning element into the passage opening of the anchor block and securing the tensioning element to the anchor block.
  • the holder is moved by means of a pull cable to the anchor block.
  • a traction cable can be arranged both at the end of the holder facing towards the anchor block and at the end of the holder facing away from the anchor block, it being possible in each case for a separate winch to be associated with each of the two traction cables.
  • This development allows a controlled back and forth movement of the bracket between a clamping element-starting position, which may be located for example on the bridge deck of the cable-stayed bridge or at the height of the foundation of a tower, and the anchor block, for example, in the pylon of the cable-stayed bridge or at height the spire may be, for example, a controlled reciprocating motion in the cladding tube of the tendon.
  • the winch assigned to the tensioning element starting position is operated in such a way that the tensioning cables are essentially constantly subjected to tension while the holder is being moved towards the anchor block.
  • the guide unit is connected to the pull cable, for example, is detachably connected.
  • the connection can be formed for example by an eyelet, which surrounds the pull rope loosely, so that it is movable relative to the pull rope.
  • the solubility can be provided for example in the manner of a snap hook or the like.
  • the connection is formed by means of a clamp which can be fixed immovably to the pull rope relative thereto.
  • the holder is designed for attaching at least two clamping elements.
  • several clamping elements can be moved from the clamping element starting position to the anchor block in a single operation.
  • only care must be taken to ensure that each of the clamping elements is inserted into the respective associated passage opening of the anchor block.
  • 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 dimensioned differently long. This would allow the tensioning elements to be successively inserted into the associated through-holes. This can be particularly advantageous in confined spaces.
  • the projections of the at least two clamping elements are dimensioned substantially equal length. This makes it possible to introduce the clamping elements simultaneously in the through holes of the anchor block and to anchor it.
  • the invention relates to a holder for a clamping element, in particular for carrying out the method according to the invention, comprising:
  • a base body with an elongated recess for receiving the tensioning element
  • the recess has at its two longitudinal ends in each case an outlet opening, which are designed and intended to let the clamping element in the base body and leave this again, and
  • the recess has on one of its longitudinal sides an elongate opening which has a substantially rectilinear portion which extends over the entire length of the base body, and
  • a holding force generating device which is intended to generate a holding force which presses the clamping element against a boundary wall of the recess.
  • the holder of the invention also helps to simplify the installation of the clamping elements and thus to achieve the object of the invention. Namely, one needs to insert the respective clamping element only from above through the substantially rectilinearly extending portion of the upper opening of the recess in the recess and then to actuate the retaining force generating means. In this case, the supernatant of the clamping element required for carrying out the method according to the invention can escape from the holder through the one outlet opening, while the remaining length of the clamping element emerges from the other outlet opening. As a result of their actuation, the holding force generating device 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 means comprises an adjustable relative to the base body engaging member which is designed and intended to engage with the clamping element in abutting engagement and to press this in abutment against a fixed wall portion of the recess of the base body.
  • the engagement element may for example be formed by a relative to the base body adjustable punch which, in particular with the aid of tools, by hand or by means of a power device is adjustable.
  • the engagement element is formed by a surface portion of a flexible element, such as a hose or a balloon, which is hydraulically and / or pneumatically filled and emptied.
  • the clamping element While the clamping element is pressed into abutment against a fixed wall section of the recess of the base body, it can also lead to an at least partial displacement of the clamping element in the recess.
  • the retaining force generating device can be designed to deflect the tensioning element out of its rectilinear course.
  • a located between the two outlet openings longitudinal portion of the clamping element is bent into a substantially double-S-shaped course. If the simple double S-shaped curve is not sufficient to produce the required holding force, then a multiple double S-shaped curve can be used. For this purpose, a corresponding number of engagement elements can be provided.
  • the base body further comprises a top wall, which covers the At least in sections, for example, adjacent to the fixed wall section, covered.
  • This top wall can secure the clamping element in a form-fitting manner to automatically emerge from the recess in an unintended manner.
  • the holder comprises at least two recesses according to the invention.
  • the holder may comprise two such recesses, which are arranged with respect to the longitudinal direction of the holder is substantially mirror-symmetrical.
  • the two recesses may be assigned a common holding force generating device.
  • the common holding force generating device may comprise two engagement elements, each of which is intended to engage with one of the clamping elements in engagement, and which are adjustable by means of a common adjusting device.
  • the common holding force generating device comprises an engaging unit which is pivotable or rotatable on the base body about an axis parallel to its height direction.
  • two sections of the engagement unit can each form an engagement element that is intended to engage with one of the clamping elements in abutting engagement.
  • the engagement between the holding force generating means and the tensioning member must be accomplished in a manner which prevents or risks the risk of damaging the tensioning member or a part of the tensioning member, such as the protective jacket surrounding the strand Danger completely excludes, and this regardless of whether the holding force is generated by frictional engagement and / or by positive locking.
  • the clamping element in particular the protective sheath of the strand forming the actual clamping element, substantially only elastically deformed.
  • plastic deformation of the protective jacket could result in cracking which could jeopardize the protection of the strand from corrosion due to the ingress of moisture through the cracks.
  • the surface of the engagement element provided for engagement with the clamping element could be formed at least partially with a rough surface, wherein the individual, the surface roughness forming holding projections protrude from the base of the surface by a distance which is smaller than the thickness of the protective jacket.
  • the form-fit component of the retaining force can also be produced by providing the surface of the engagement element that is intended to engage with the tensioning element with a coating which conforms to the Surface of the clamping element is designed. Additionally or alternatively, however, it is also possible that the coating is elastically deformable, so that it can adapt to the surface shape of the clamping element. Further, the coating for increasing the frictional contribution to the holding force may have a static coefficient of friction which is greater than that of the material from which the stamp is formed. Also, the surface of the base body, against which the clamping element is pressed by means of the punch, may be provided with a coating which has at least one of the properties explained above for the coating of the stamp.
  • the invention also relates to the combination of a holder according to the invention with at least one clamping element, in particular at least one clamping element comprising a strand formed from a plurality of wires, which is enveloped by a protective sheath.
  • Figure 1 is a schematic view of a cable-stayed bridge, in whose
  • Figure 2 is a schematic view for explaining the interaction of the clamping elements with the holder, the traction cables and the anchor plate;
  • Figure 3 is a plan view of a first embodiment of the holder according to the invention.
  • Figure 4 is a plan view of a second embodiment of the holder according to the invention.
  • a cable-stayed bridge in which the method according to the invention can be used is designated generally by 100. It comprises a bridge deck 102, on which, for example, traffic routes for motor vehicles and / or other vehicles and / or pedestrians may be arranged, and at least one pylon 104. Between an anchor point 106 of the pylon 104 and an anchor point 108 of the bridge deck 102 extends a stay cable 1 10th
  • the cable-stayed bridge 100 may comprise a plurality of such cable cables and also includes them in the majority of cases. Only for the sake of simplicity, only a single stay cable 10 has been shown in FIG.
  • the cable 1 10 in turn comprises a plurality of strands, of which only three are shown in Figure 1 for the sake of clarity, namely the strands 1 12, 1 14 and 1 16.
  • the strand 1 12 is already installed completely, i. It is anchored both in an anchor block 1 18 of the anchor point 106 and in an anchor block 120 of the anchor point 108. For this purpose it passes through through holes 1 18a and 120a of the anchor blocks 1 18 and 120 and is held in these by means of wedges 122 and 124, respectively.
  • the strands 1 14 and 16 are just about to be 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 1 14 and 1 16 inserted into a holder 128 and secured thereto by clamping (see also Figure 3).
  • clamping see also Figure 3
  • the attachment of the strands 1 14 and 1 16 is accomplished on the bracket 128, will be explained in more detail below with reference to Figure 3.
  • pull cables 130 and 132 are attached, which extend over pulleys 134 to a first winch 136 and a second winch 138.
  • a controlled reciprocating movement of the holder 128 between the starting position 126 and the anchor point 106 can be accomplished.
  • the attachment of the traction ropes 130 and 132 at the longitudinal ends 128a and 128b of the holder 128 can be done for example by means of so-called swirlers, which have an axial joint.
  • Essential to the invention is the location at which the holder 128 relative to the free ends 1 14a, 1 16a of the strands 1 14, 1 16 is attached. Namely, this location is such that the distance d between the bracket 128 and the free ends 14a, 16a of the strands 14, 16 is greater than a free strands length required to pass the strands through the through holes 1 18b and 1 18c of the anchor block 1 18 (see Figure 2) pass and anchored there by means of the wedges 122 can. In this way, the two strands 1 14 and 1 16 can be transported to the anchor point 106 until their free ends 1 14 a and 1 16 a are arranged immediately in front of the anchor block 1 18.
  • the transport speed of the strands 1 14 and 1 16 is reduced by appropriate control of the winches 136 and 138 such that their free ends 1 14a and 1 16a can be manually threaded into the through holes 1 18b and 1 18c. If the free ends 1 14a and 16a on the back of the anchor block 1 18 protrude sufficiently, the winches 136 and 138 are stopped to allow the assembling personnel to cut the strands 114 and 116 by means of the wedges 122 in the anchor block 118 to anchor. After anchoring the clamping engagement between the bracket 128 and the strands 1 14 and 1 16 can be solved so that the bracket 128 can be moved by appropriate control of the winches 136 and 138 back to the starting point 126 to record there the next pair of wires.
  • guide units 140 and 142 are arranged (see Figure 2). These guide units 140 and 142 have the task of the free ends 1 14a and 16a of the strands 1 14 and 1 16 to protect against, during transport to the anchor point 106 due to their supernatant 1 14b and 1 16b beyond the bracket 128 between already installed strands to catch. This risk is all the more, as the strands 1 12, 1 14 and 1 16 are accommodated in a tube 144 which is disposed between the two anchor points 106 and 108 to protect the strands against external influences, in particular against corrosion.
  • the two guide units 140 and 142 are releasably connected to the pull cable 130, wherein the corresponding connection points in Figure 2 are indicated only schematically at 140a and 142a.
  • FIG. 3 shows a first embodiment of a holder 128 according to the invention. It comprises a mirror-symmetrically constructed with respect to a longitudinal axis A base body 150 with two elongated, upwardly open recesses 152 and 154, which are designed and intended to receive the strands 1 14 and 1 16.
  • the recesses 152 and 154 are limited to the longitudinal axis A through boundary walls 152a and 154a and on their side facing away from the longitudinal axis A side of webs 152b and 154b and surfaces 152c and 154c, which are formed on punches 156 and 158. Furthermore, the strands 1 14 and 1 16 accommodated in the recesses 152 and 154 rest on a surface 150 a of the base body 150. Finally, the recesses 152 and 154 have at their two longitudinal ends end openings 152d and 152e or 154d and 154e.
  • the boundary walls 152a and 154a, as well as the webs 152b and 154b are in the illustrated embodiment attached to the base body 150 and formed integrally therewith.
  • the openings through which the strands 1 14 and 1 16 can be inserted into the recesses 152 and 154 are indicated in FIG. 3 as 153 and 155, respectively, in 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 1 14 and 1 16 to press against the Begrenzungswandung in 152 a and 154 a.
  • the strands 1 14 and 1 16 between the boundary walls 152 a and 154 a on the one hand and the punches 156 and 158 on the other hand clamped with a force that makes it possible to transport the strands 1 14 and 1 16 by means of the bracket 128 to the anchor point 106 , Without the strands 1 14 and 1 16 unintentionally solve automatically from the holder 128.
  • the holding force generating means 160 and 162 form together with the respective punch 156 and 158 holding force generating means in the sense of the claims.
  • the holding force generating means 160 and 162 may be designed as mechanically or / and electromotively and / or electromagnetically or / and pneumatically or / and hydraulically actuatable actuating units.
  • Stellkrafterzeugung may also be provided a transmission which undergoes an input movement of the respective actuating unit in an actuating movement of the punches 156 and 158.
  • the retaining force generating means 160 and 162 may be formed by bolts which are received in a threaded bore of the base body 150 and press against the punches 156 and 158.
  • the thread of the bolt serves the just mentioned reduction of the rotary input movement of the bolt in a translational adjusting movement of the bolts and thus acts as the transmission.
  • the Haltekrafterzeugungs- means 160 and 162 are formed as inflatable tubular elements whose acting on the strands 1 14 and 1 16 surface portions act as the punches 156 and 158.
  • both punches 156 and 158 is assigned a common actuating unit.
  • the punches 156 and 158 could be formed as cams, which are arranged on the outer circumference of a disc, which is rotatably mounted on the base body 150 about a longitudinal axis A and to the transverse direction Q orthogonal axis Z.
  • a single actuator suffices to press both punches 156 and 158 against the strands 14 and 16 simultaneously by rotation of the disc.
  • both the boundary walls 152a and 154a and the surfaces 152c and 154c of the punches 156 and 158 are curved.
  • the boundary walls 152a and 154a seen in the direction of the longitudinal axis A on a double-S-shaped course.
  • the lateral offset i. the offset in the transverse direction Q, dimensioned in the illustrated embodiments substantially the same size as the diameter D of the strands 1 14 and 1 16.
  • the base body 150 comprises a top wall 164, which is shown in phantom in Figure 3 and arranged such that they Covered portions of the boundary walls 152a and 154a, which have the smallest distance from the longitudinal axis A.
  • the strands 1 14 and 1 16 can be attached to the bracket 128 as follows:
  • the strands as shown in Figure 3 for the strand 1 14, extending straight into the associated recess, here the recess 152 introduced until it on the surface 150a of the base body 150th rest.
  • the strand 1 14 enters through the opening 152 d in the recess 152 and at the other end of the bracket 128 through the opening 152 e again from this.
  • the holding force generating means 160 are actuated such that the punch 156 is applied laterally to the strand 1 14 and begins to press against the boundary wall 152 a.
  • the straight course of the strand is bent in the immediate vicinity of the punch in a double-S-shaped course, which corresponds to the double-S-shaped course of the associated boundary wall.
  • FIG. 4 shows a second embodiment of a holder according to the invention, which essentially corresponds to the first embodiment according to FIG. Therefore, analogous parts in FIG. 4 are given the same reference numerals as in FIG. 3, but increased by the number 100.
  • the holder 228 according to FIG. 4 will be described below only insofar as it extends from the holder 128 according to FIG which is expressly referred to herewith.
  • 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 parallel to the vertical axis Z extending axis.
  • the holding force generating unit 260 has two cams 260a and 260b which cooperate with the punches 256 and 258. Due to this arrangement, the punches 256 and 258 do not act from the outside to the inside as in the case of the embodiment according to FIG. 3, but from inside to outside.
  • the webs 252b and 254b are arranged on the longitudinal axis A side facing the strands 214 and 216.
  • the top wall 264 is divided into two parts.
  • the rotation of the holding force generating unit 260 may be accomplished in a manner known to those skilled in the art. Therefore, a detailed description is omitted here.
  • FIG. 4 below the longitudinal axis A, the state of the retaining force generating unit 260 is shown, which enables the insertion of the strand 216 into the recess 254.
  • the two cams 260a and 260b are aligned on the longitudinal axis A.
  • FIG. 4 above the longitudinal axis A shows the holding state according to which the strand 214 is pressed by the punch 256 against the boundary wall 252a and thus under the top wall 264. This is made possible by a rotation of the retaining force generating unit 260 by 90 ° about the axis X, so that the cam 260a assumes the position 260a '.

Landscapes

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

Abstract

L'invention concerne un procédé d'installation d'un élément de serrage (114) dans un bloc d'ancrage (118), procédé dans lequel l'élément de serrage (114) est fixé à un support (128), le support (128) est déplacé vers le bloc d'ancrage (118), l'élément de serrage (114) est inséré dans une ouverture de passage (118b) du bloc d'ancrage (118), et l'élément de serrage (114) est fixé au bloc d'ancrage (118). Selon l'invention, le support (128) est monté sur l'élément de serrage (114) à une distance choisie telle que la longueur de la saillie (114b) du côté du support (128) qui est tourné vers le bloc d'ancrage (118) est supérieure à la longueur d'une partie de l'élément de serrage (114) nécessaire pour insérer l'élément de serrage (114) dans l'ouverture de passage (118b) et pour fixer l'élément de serrage (114) au bloc d'ancrage (118). De plus, l'invention concerne également un support (128), destiné notamment à la mise en œuvre de ce procédé.
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 true EP3555369A2 (fr) 2019-10-23
EP3555369B1 EP3555369B1 (fr) 2021-02-17

Family

ID=60957268

Family Applications (1)

Application Number Title Priority Date Filing Date
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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Also Published As

Publication number Publication date
WO2018114664A2 (fr) 2018-06-28
DE102016225416A1 (de) 2018-06-21
US20190323184A1 (en) 2019-10-24
CA3045223A1 (fr) 2018-06-28
ES2864135T3 (es) 2021-10-13
EP3555369B1 (fr) 2021-02-17
US10669680B2 (en) 2020-06-02
WO2018114664A3 (fr) 2018-08-16

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