EP4053351A1 - Coffrage pour joints de dilatation pourvu de dispositif de serrage - Google Patents

Coffrage pour joints de dilatation pourvu de dispositif de serrage Download PDF

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Publication number
EP4053351A1
EP4053351A1 EP22159270.2A EP22159270A EP4053351A1 EP 4053351 A1 EP4053351 A1 EP 4053351A1 EP 22159270 A EP22159270 A EP 22159270A EP 4053351 A1 EP4053351 A1 EP 4053351A1
Authority
EP
European Patent Office
Prior art keywords
section
formwork
expansion joint
abutment
anchoring
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
Application number
EP22159270.2A
Other languages
German (de)
English (en)
Inventor
Willibald Fischer
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.)
FWR Solutions GmbH
Original Assignee
FWR Solutions 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 FWR Solutions GmbH filed Critical FWR Solutions GmbH
Publication of EP4053351A1 publication Critical patent/EP4053351A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6806—Waterstops
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6807—Expansion elements for parts cast in situ
    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/365—Stop-end shutterings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups

Definitions

  • the invention relates to expansion joint formwork for concrete construction according to the preamble of patent claim 1.
  • Concrete structures are usually created in sections, with gaps forming between the concreting sections that are created one after the other. These are either construction joints, if the concreting sections abut directly, possibly with the interposition of a lost formwork, or expansion joints, if a gap remains between adjacent concreting sections, which is filled by a deformable separating joint insert. Expansion joints are provided so that the hardened concrete sections can expand under the influence of heat or can move relative to one another under the influence of forces on the structure without causing damage to the concrete.
  • formwork with a formwork panel is arranged, which prevents the concrete from running off the end face of the concreting section.
  • the still flowable concrete exerts considerable hydrostatic pressure on the formwork panel.
  • a back-anchoring device This has at least one tension member which is connected at one end to the formwork wall and at the other end to the static reinforcement or a ground anchor on the side of the formwork wall facing the initial concreting section. This results in bracing of the formwork panel against the concrete pressure.
  • lost formwork for construction joints for example, it is from the EP 2 157 260 A1 or from the EP 2 192 237 A2
  • a rod-shaped tension strut as a back-anchoring tension member, which penetrates the formwork panel at one end and is secured there with a screw connection, while at the other end it is connected to the static reinforcement either directly or via a suspension bracket or a suspension loop.
  • Such back-anchoring devices are very well suited for lost stop ends of construction joints. However, they are not suitable for creating expansion joints because an expansion joint must not be crossed by a rigid component in order not to impede the mobility of the concrete sections in the joint.
  • expansion joint formwork after the generic one DE 10 2016 217 430 A1 ensured by the fact that the back-anchoring device crosses the formwork wall by means of a flexible tension element which does not appreciably impede mobility in the expansion joint.
  • This tension member which is designed in particular as a rope loop, is in the case of the expansion joint formwork DE 10 2016 217 340 A1 hooked on the side of the second section directly to the supporting structure there, which thereby forms the abutment for the occurring in the rear anchoring device forms tensile forces.
  • a tension rod is provided which is integrated into the back-anchoring device and can be adjusted in the longitudinal direction by means of a screw connection.
  • This tension rod is located in the first section.
  • the screw connection is difficult to access there, especially if several layers of static reinforcement are installed there.
  • the object of the invention is to simplify the handling of the expansion joint formwork.
  • an expansion joint formwork for attachment between a first section to be concreted first and a second section to be concreted afterwards in concrete construction for the purpose of forming an expansion joint between the sections, with a permanent formwork element which has a formwork wall containing a deformable parting line insert between cover plates on both sides, wherein a first support structure is attached to the formwork wall on the first section side and a second support structure is attached to the formwork wall side on the second section side, and with a back-anchoring device against the concrete pressure in the first section, which has means for anchoring to the static reinforcement or to the ground in the first section at one end and at the other end the shuttering wall with a flexible tension element interspersed in a longitudinally movable manner and on the second section side on an abutment of the second supporting structure with its end region there in the direction of the second section on the shuttering wall and is supported, characterized in that between the abutment and the end area a clamping device that can be actuated in the second section is
  • the tensioning device to be actuated for the back-anchoring device is located in the second section. There it is easily accessible and easy to use. This facilitates and speeds up the installation of the formwork.
  • the tensioning device has an adjusting screw with a threaded shank and screw head, which is rotatably supported with the free end of the threaded shank on the abutment, and with the threaded shank of which a drawing block is screwed, which can be coupled to the end area of the tension element on the second section side in such a way that the end area can be rotated by turning the adjusting screw is pulled in the direction away from the formwork wall into the second section.
  • the adjusting screw can be easily reached in the second section and, in particular, can be tightened quickly and mechanically with a cordless screwdriver.
  • the abutment can be an integral part of the second supporting structure, as a result of which the tensioning device is supported directly on the second supporting structure.
  • the abutment has a base plate fastened or supported on the second supporting structure and a sleeve protruding from it in the direction of the second section on, in which the free end of the threaded shaft is rotatably received.
  • the drawing block comprises a perforated plate and a nut fixed to it coaxially with the perforation thereof and screwed onto the threaded shank.
  • An advantageous mounting of the flexible tension element on the perforated plate can thus be made possible.
  • the flat design saves space.
  • the perforated plate extends orthogonally to the threaded shaft.
  • the flexible pulling element is a cable which loops around the drawing block with its end area on the second section side.
  • the flexible traction element is advantageously a steel cable.
  • the perforated plate has slots open to the side, in which the cable pull is received. This makes it possible for the cable to be easily and securely connected to the tensioning device after it has been passed through the formwork wall, namely by inserting it into the slots.
  • the cable pull forms a closed loop, the end region of which on the first section side can be hooked into the end of a pull rod of the back-anchoring device that is opposite the anchoring means. This enables a simple connection of the cable pull in the first section.
  • the length of the pull rod is variable.
  • the cable can be easily connected to the pull rod under tension and thus remains securely connected to the pull rod and the tensioning device, even before the tensioning device is tightened.
  • the cable consists of a double strand.
  • a cable pull that is flexible but can nevertheless withstand high tensile forces can thus be provided.
  • Each strand of the double strand advantageously has a diameter of 3 to 5 mm, preferably 4 mm. In the case of a steel cable in particular, these are advantageous dimensions with sufficient tensile strength.
  • the cable pull penetrates the formwork wall in holes whose diameter is larger than the cable pull diameter or double strand diameter of the cable pull.
  • the holes are at most twice as large as the cable diameter or double strand diameter.
  • the second support structure has a double bracket, the brackets of which are connected by the base plate of the abutment.
  • the base plate also serves synergistically for the structure of the second support structure.
  • the second support structure is designed in such a way that a static reinforcement of the second section can be attached to it.
  • the invention further provides a method of tying back a formwork wall in which a tie-back device is attached to static reinforcement or to the ground in a first section.
  • a flexible tension element of the back-anchoring device is passed through a formwork wall that delimits the first section from a second section.
  • the flexible pulling element is tensioned in the second section.
  • a clamping device arranged in the second section is used for clamping.
  • the method can be carried out in particular on an expansion joint formwork as defined above.
  • the invention provides a use of an expanding or spreading tensioning device for tensioning a back-anchoring device for a formwork wall in concrete construction.
  • back-anchoring devices are tensioned by contracting tensioning devices.
  • figure 1 shows an embodiment of an expansion joint formwork according to the invention in plan view.
  • figure 2 shows an enlarged view of the clamping device.
  • Figure 2a shows a detail figure 2 .
  • figure 3 shows the cut, AA off figure 2 .
  • figure 4 shows the cut BB out figure 2 .
  • FIG. 12 shows a side sectional view according to CC FIG figure 1 .
  • figure 6 shows a side view according to DD figure 1 .
  • FIG 1 an expansion joint formwork between a first section 1 (BA1) and a second section 2 (BA2) is shown in plan view.
  • the first section 1 and the second section 2 are successively filled with concrete.
  • the first section 1 and the second section 2 are delimited from one another by a permanent formwork element 3 which has a formwork wall 4 .
  • the formwork wall 4 has a deformable parting line insert 5 and cover plates 6 on both sides. This formwork wall 4 thus forms an expansion joint, which can compensate for expansion and relative movements of the concrete parts.
  • the formwork element 3 is supported via a spacer 7 on a reusable formwork 8 which delimits one or more concrete sections.
  • the formwork 8 can in particular be a wooden formwork.
  • a static reinforcement 9 is provided in the concreting sections BA1, BA2, as in figure 1 shown for the first section 1, .
  • the static reinforcement 9 comprises in particular a grid of metal rods.
  • a back-anchoring device 10 is provided, which is hung on the static reinforcement 9 by means 11 in the form of a cable loop.
  • the back-anchoring device 10 has a flexible tension element 12 that is guided through holes 13 in the formwork wall 4 .
  • the flexible pulling element 12 consists of a pair of cable strands which form a closed loop or double loop.
  • the flexible tension element 12 extends up to a tensioning device 14 which is arranged in the second section 2 .
  • the flexible pulling element 12 is suspended in the clamping device 14 .
  • the back-anchoring device 7 has a two-part tension rod 15 arranged in the first section 1 .
  • the length of the pull rod 15 can be changed via a clamping mechanism 16 .
  • a pretension can be applied to the flexible tension element 12 by shortening the tension rod 15 .
  • the tensioning device 14 is expanded, i.e. the length of the tensioning device is increased, so that the flexible pulling element 12 is pulled further into the second section 2 .
  • the formwork wall 4 is thus pretensioned in the direction of the first section 1 and is thus anchored against the concrete pressure when the first section 1 is subsequently filled with concrete.
  • the formwork element 3 also has a first support structure 17 on the first section side, which is fastened to the cover plate 6 on the first section side via webs 30 and on which the static reinforcement 9 is supported. Furthermore, the formwork element 3 has a second supporting structure 18 on the second section side, which is fastened to the cover plate 6 on the second section side via webs 31 .
  • the formwork wall 4 contains a joint strip 33 which is arranged in a cage 34 formed by the supporting structures 17, 18.
  • an abutment 19 is fastened to the second support structure 18 and has a base plate 20 and a sleeve 21 protruding from the base plate 20 in the direction of the second section 2 .
  • the clamping device 14 comprises an adjusting screw 22 which has a threaded shank 23 and a screw head 24 .
  • An M16-200 screw is particularly suitable.
  • the end of the threaded shank 23 facing the first portion 1 is received in the sleeve 21 and is free to rotate therein.
  • the free end of the threaded shank 23 is supported in the sleeve 21 on the base plate 20 and there transmits the reaction force to the clamping force on the supporting structure 18 and thus on the formwork wall 4.
  • the screw head 24 is arranged at the opposite end of the threaded shank 23.
  • a drawing block 25 is screwed onto the threaded shank 23 .
  • the drawing block 25 comprises a perforated plate 26 and a nut 27 attached thereto, both of which the threaded shank 23 extends through.
  • the flexible tension element 12 is hooked into the tension rod 15 in the first section 1 .
  • In the second section 2 is an end portion 29 of the flexible tension member 12 in the drawing block 25 of Clamping device 14 hooked.
  • the flexible tension element 12 forms a closed loop that can already be delivered through the formwork wall 4 .
  • the screw head 24 is turned with a screw machine and the pulling block 25 is thus moved away from the first section 1, so that the distance 100 between the abutment 19 and the end region 29 of the flexible pulling element 12 is increased .
  • the drawing block 25 is initially manually secured against twisting.
  • a mechanical anti-twist device for the drawing block 25 can also be provided, for example by means of a guide for the drawing block fastened to the second support structure 18 .
  • this is not necessary, since after the build-up of a pretension, the anti-twist device is ensured by the flexible tension element 12 .
  • FIG 3 shows how the base plate 20 of the abutment 19 is fastened to the second support structure 18 .
  • the supporting structure 18 consists here of a double bracket with an intermediate spacing.
  • the base plate 20 is welded to the struts of the second support structure 18 in the manner of a bridge. Furthermore, the arrangement of the threaded shaft 23 in the sleeve 21 is shown, as well as the eccentric guidance of the flexible tension element 12.
  • FIG 5 the arrangement of two of the clamping devices one below the other on the formwork wall 4 is shown in a side sectional view.
  • the double cable strand of the flexible tension element 12 runs through the holes 13 in the formwork wall 4.
  • figure 6 1 shows the location of the draw block 25 of each of the fixtures and how the flexible draw member 12 is received in the slots 28 of the aperture plate 26.
  • FIG. The end area 29 of the flexible pulling element 12 is guided around the threaded shaft 23, as also shown in FIG 2 shown.
  • the strands of the double strand of the flexible tension element 12 are each guided past the threaded shaft 23 on opposite sides. The double strand is thus spread open by the threaded shank 23 .
  • the flexible tension element 12 is hooked into the tension rod 15 in the device described above and then the adjusting screw 22 is turned until the flexible tension element 12 is sufficiently tensioned to anchor the formwork wall 4 with respect to the first section 1.
  • an expanding jig 14 is used as shown.
  • the rough adjustment of the tension can be set on the variable-length tension rod 15 before it is installed.
  • the final tension is applied by the tensioning device 14 according to the invention.
  • the invention is not limited to the embodiment described above.
  • the tension rod forming part of the back anchor device is made of DE 10 2017 216 383 A1 known, the content of which is made the subject of the present disclosure for the sake of clarity.
  • the back-anchoring device can be designed differently on the side of the first section, in particular as in the exemplary embodiments of FIG DE 10 2016 217 430 A1 , the content of which is hereby also made the subject matter of the present disclosure.
  • a single strand can also be used for the flexible tension element 12, as long as its diameter does not have to be chosen so large for the purpose of sufficient strength that it impairs mobility in the expansion joint. In the case of very high voltages, more than two strands with a diameter of approx. 4mm may be required.
  • the base plate 20 of the abutment 19 does not have to be welded to the second support structure. It can also be bent and pushed onto the bracket or brackets of the second support structure 18 and pressed on by the clamping force. Instead of a nut 27 welded on, the drawing block 25 itself can be provided with a thread in its through hole.
  • the cable pull of the flexible pull element 12 does not have to be in the form of a loop. It can also have one or more free end(s) attached to the drawing block 25, for example by clamping screws, clamping plate, or welding.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
EP22159270.2A 2021-03-01 2022-02-28 Coffrage pour joints de dilatation pourvu de dispositif de serrage Pending EP4053351A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021104831.1A DE102021104831A1 (de) 2021-03-01 2021-03-01 Dehnfugenschalung mit Spannvorrichtung

Publications (1)

Publication Number Publication Date
EP4053351A1 true EP4053351A1 (fr) 2022-09-07

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ID=80595253

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EP22159270.2A Pending EP4053351A1 (fr) 2021-03-01 2022-02-28 Coffrage pour joints de dilatation pourvu de dispositif de serrage

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EP (1) EP4053351A1 (fr)
DE (1) DE102021104831A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171120A (en) * 1938-05-21 1939-08-29 Edwin W Bullard Tie wire apparatus
EP2157260A1 (fr) 2008-08-19 2010-02-24 FWR Solutions GmbH Coffrage doté d'un dispositif d'ancrage arrière
EP2192237A2 (fr) 2008-12-01 2010-06-02 FWR Solutions GmbH Coffrage avec un dispositif d'ancrage
EP2253779A2 (fr) * 2009-05-12 2010-11-24 Peca Verbundtechnik GmbH Système de coffrage
DE102016217430A1 (de) 2016-09-13 2018-03-15 Fwr Solutions Gmbh Dehnfugenschalung
DE102017216383A1 (de) 2017-09-15 2019-03-21 Fwr Solutions Gmbh Verlorene schalung für den betonbau

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1736848A (en) 1928-02-06 1929-11-26 Louis V Dickinson Wire tightener

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171120A (en) * 1938-05-21 1939-08-29 Edwin W Bullard Tie wire apparatus
EP2157260A1 (fr) 2008-08-19 2010-02-24 FWR Solutions GmbH Coffrage doté d'un dispositif d'ancrage arrière
EP2192237A2 (fr) 2008-12-01 2010-06-02 FWR Solutions GmbH Coffrage avec un dispositif d'ancrage
EP2253779A2 (fr) * 2009-05-12 2010-11-24 Peca Verbundtechnik GmbH Système de coffrage
DE102016217430A1 (de) 2016-09-13 2018-03-15 Fwr Solutions Gmbh Dehnfugenschalung
DE102017216383A1 (de) 2017-09-15 2019-03-21 Fwr Solutions Gmbh Verlorene schalung für den betonbau

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Publication number Publication date
DE102021104831A1 (de) 2022-09-01

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