EP3456902B1 - Coffrage perdu pour constructions en béton - Google Patents

Coffrage perdu pour constructions en béton Download PDF

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Publication number
EP3456902B1
EP3456902B1 EP18193133.8A EP18193133A EP3456902B1 EP 3456902 B1 EP3456902 B1 EP 3456902B1 EP 18193133 A EP18193133 A EP 18193133A EP 3456902 B1 EP3456902 B1 EP 3456902B1
Authority
EP
European Patent Office
Prior art keywords
formwork
rod
tension
eccentric
claw
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
EP18193133.8A
Other languages
German (de)
English (en)
Other versions
EP3456902A1 (fr
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 EP3456902A1 publication Critical patent/EP3456902A1/fr
Application granted granted Critical
Publication of EP3456902B1 publication Critical patent/EP3456902B1/fr
Active legal-status Critical Current
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Classifications

    • 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
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/50—Removable forms or shutterings for road-building purposes; Devices or arrangements for forming individual paving elements, e.g. kerbs, in situ
    • E01C19/502—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes
    • 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
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
    • 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
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B2005/322—Floor structures wholly cast in situ with or without form units or reinforcements with permanent forms for the floor edges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • 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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
    • 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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/04—Shores or struts; Chocks telescopic
    • E04G2025/045—Shores or struts; Chocks telescopic which telescoping action effected by a lever

Definitions

  • a lost formwork, in particular a joint formwork, for concrete construction has an essentially concrete-impermeable formwork wall, which is erected on edge on a base, mostly a static reinforcement layer consisting of longitudinal and transverse rods.
  • the shuttering panel then forms the boundary between a concrete section BA1 to be poured first and a second concrete section BA2 to be poured later.
  • the hydrostatic pressure that builds up in BA1 during pouring through the flowable concrete generates a considerable force which tries to shift or tilt the formwork panel away from BA1 in the direction of BA2.
  • back anchoring devices are used, which brace the formwork panel against the base.
  • Another back anchoring device also for construction joint formwork, is from the DE 20 2009 004 804 U1 known.
  • a tension rod or a strong tension wire is hooked into the static reinforcement with one end via a shackle and the other end is pushed through the formwork panel. This other end is then bent so that it protrudes essentially perpendicularly from the formwork panel in the direction of the BA2.
  • a so-called eccentric turnbuckle also called a tensioning frog, is pushed onto this protruding end until it rests on a stiffening part of the formwork panel and then clamped. This will secure the pull rod against being pulled back.
  • Tensioning or adjusting the length of the tension rod is hardly possible here, however, since the tension rod is kinked in the area of the formwork panel and the kink point can only be pulled with difficulty over the kink edge on the formwork panel.
  • a back anchoring device in which a tension rod is suspended in the static reinforcement using a bracket bent in a wave-like manner from a rod.
  • the bracket is designed in such a way that the tensile force occurring in the tension rod during concreting is converted into a clamping force by the bracket, which presses the crossing longitudinal and transverse bars of the static reinforcement in the attachment area of the bracket.
  • a back anchoring device for concrete formwork which has two tension rods overlapping between their ends. In the overlapping area, the tension rods are releasably pressed together by means of one or more rope clamps.
  • the rope clamps must be tightened or loosened by tightening or loosening screws using a tool.
  • an eccentric turnbuckle is known. This is pushed onto a protruding end of a steel wire penetrating the two walls of a concrete wall formwork and locked there by means of an eccentric. It serves as a stop for a formwork wall relative to the steel wire.
  • the invention is based on the object of creating a permanent formwork for concrete construction which is functionally improved compared to the prior art described above.
  • the invention is defined by a permanent formwork according to claim 1.
  • the two tension rods are easily accessible in the overlapping area and can easily be adjusted and tensioned to the correct length when the turnbuckle is released, without the need to bend the rods. This simplifies and improves the handling of the anchoring device on site.
  • the formwork is preferably designed according to claim 2. The fact that the eccentric turnbuckle points downwards in the installed state ensures that the actuating lever of the turnbuckle is not accidentally moved into the release position when the concrete is shaken in the BA1 section.
  • the illustrated embodiment of a formwork according to the invention for concrete construction has a formwork wall 1 with which a construction joint can be formed between a construction section BA1 to be concreted first and a concrete section BA2 to be concreted afterwards.
  • the shuttering wall 1 contains a shuttering panel 2, which consists of a partially permeable material that retains the concrete in the BA1, in particular an expanded metal.
  • the formwork panel 2 is stiffened in a known manner on the side facing the BA1 with lattice girders 3 and a connecting rod 4 that connects them and is welded to their upper chords.
  • the formwork wall is erected upright on the static reinforcement 5 of the concrete component to be produced, for example a foundation plate, which consists of longitudinal bars 6 and transverse bars 7 and is supported on a blinding layer 8 by means of spacers 9 in the usual way.
  • the static reinforcement 5 could also consist of several layers of longitudinal and transverse bars, but only one layer is shown.
  • a back anchoring device secures the formwork wall 1 against shifting or tilting under the concrete pressure building up in BA1.
  • the anchoring device is coupled in a manner to be described with one, in the drawing the left end with the static reinforcement 5 and with the other, in the drawing right end with the formwork wall 1 in a manner also to be described.
  • the anchoring device 10 has tension rods 11 and 12, which are made of structural steel and, for example, have a diameter of 10 mm.
  • the otherwise straight tension rods 11, 12 each have ends 11a, 12a bent back in a hook shape with straight end sections 11b, 12b.
  • the other end areas of the tension rods 11, 12 overlap in the space of the BA1 in an overlap area 13.
  • a commercially available eccentric turnbuckle 14, in practice also called “tensioning frog”, is firmly connected to one tension rod 11 in the overlap area 13 so that it points downwards in the operating position shown.
  • Such a commercially available turnbuckle has a through-channel 15, which is arranged at 15 in dash-dotted lines and through which the straight end of the tension rod 12 in the overlap region 13 can be pushed.
  • a generally toothed eccentric protrudes into the through-channel 15 under the pressure of a spring, which eccentric can be pivoted out of the through-channel 15 by means of an operating lever 16.
  • the length of the anchoring device 10 can be adjusted to the desired dimension and the anchoring device can be pretensioned. This position can then be fixed by releasing the spring-loaded eccentric by means of the operating lever 16.
  • the length adjustment of the anchoring device 10 and its pre-tensioning can therefore be accomplished at an easily accessible point and without bending the tension rods. A loosening of the fixation when the concrete is vibrated in the concreting section BA1 is not to be feared, since the eccentric turnbuckle 14 is protected below the tension rods 11, 12.
  • the anchoring device 10 is hooked into the stiffening structure 3, 4 of the formwork wall 1 by means of the hook-shaped end 12a of the tension rod 12, in the illustrated embodiment in such a way that the hook-shaped end 12a encompasses the upper chord of one of the stiffening lattice girders 3.
  • the anchoring device 10 is coupled to the static reinforcement 5 via an intermediate member 17, which is designed in such a way that the anchoring force R transmitted by the rods 11, 12 is partially compressed into a clamping force K, K which compresses a longitudinal rod 6 and a transverse rod 7 in their intersection area is implemented. Details of this construction are given below with reference to FIG Figure 4-6 explained.
  • Figure 2 shows the anchoring device 10 in connection with a formwork wall 1 'for producing an expansion joint.
  • the formwork wall 1 ' contains a formwork panel 2' which contains a separating joint insert 18.
  • the anchoring device 10 is suspended in the reinforcement structure 3 ', 4' on the BA2 side in this case by means of a cable loop 19 penetrating the formwork panel 2 '.
  • FIG. 2 A special feature of the in Figure 2 The embodiment shown consists in that the hook-shaped end 12a of the tension rod 12 is provided with a securing element 20 which prevents the hook-shaped end 12a from spreading under the anchoring force R.
  • This securing element 20 is in Figure 2a shown in perspective and consists of a sheet metal part 21, which could be designed as a simple plate, but in the preferred embodiment in the Figure 2a evident way is folded roof-shaped. In the roof legs 21a, 21b it contains spaced apart, openings 22, 23 aligned with respect to the legs.
  • the straight end of the tension rod 12 is inserted through the openings 22 and with its end section 12b through the openings 23, before the straight end of the tension rod 12 is inserted into the eccentric Turnbuckle 14 is introduced.
  • the hook-shaped end 12a cannot spread open under the effect of the tensile force R, which significantly increases the transferable restoring force R.
  • FIG. 3 shows variants of the securing element.
  • the securing element In the upper part of FIG. 3 it consists of a U-profile 24, in the back part 24a of which the openings 22, 23 are incorporated.
  • This U-profile 24 is welded to the stiffening structure 3 of a shuttering panel 2 of a construction joint shuttering, which in turn consists of expanded metal.
  • the introduction of the bent-back end 12a of the tension rod 12 takes place in a manner analogous to that in FIG Figure 2, 2a .
  • the securing element is designed as a simple sheet metal plate 25 which is welded onto parallel stiffening rods 26 of the stiffening structure 3.
  • inventions according to Figures 3, 3a, 3b have the advantage that the securing elements are permanently connected to the formwork.
  • the design as a U-profile 24 has the advantage of particularly high strength and thus a further increase in the transferable anchoring force.
  • FIG. 4 As can be seen from the somewhat enlarged, perspective illustration of the intermediate member 17 in FIG Figure 4 As can be seen, this consists of a claw 27, which in the side view has a J or L-shaped shape (cf. also Figures 1 and 2 ).
  • the claw 27 has a substantially rectilinear back part 28 corresponding to the vertical J-leg or L-leg and a leg part 29 corresponding to the J-bend or the short L-leg and protruding laterally from the lower end of the back part 28.
  • the claw 27 is off a massive, for example 4 mm thick flat material bent from sheet steel, the cut of which in Figure 4a is shown.
  • the back part 28 has a rounded support surface 30 at its lower end.
  • the opposite, upper end of the back part 28 is provided with a rounded notch 31.
  • the fillet at 30 corresponds to the diameter of a longitudinal bar 6 of the static reinforcement and the fillet at 31 is adapted to the diameter of the tension rod 11.
  • the back part 28 is located between the support surface 30 and the notch 31 provided with an opening 32, the diameter of which is slightly larger than the diameter of the tension rod 11.
  • the back part 28 Due to the production of the claw 27 by bending a flat material, the back part 28 has a U-shaped cross-section with U-legs 33 and a U-web 34.
  • the support surface 30, the notch 31 and the opening 32 are formed in the latter.
  • the U-legs 33 continue downward into hook parts 35 which protrude laterally from the back part 28 and which form flanks 29a of the leg part 29 that are spaced apart from one another.
  • the hook parts 35 enclose a distance a between them, so that an intermediate space 36 is created in the leg part 29, the width of which, corresponding to the distance a, must be at least as large as the diameter of the longitudinal rod 6.
  • Cutouts 37 are incorporated into the hook parts 35, which are open at the top and are adapted in their contour to the circumference of a transverse rod 7 of the static reinforcement 5. This creates a rounded receptacle 38 for a transverse rod 7 in the leg part 29, which laterally has a distance b (cf. Figure 4a ) from the support surface 30.
  • the hook parts 35 form securing lugs 39 on their upper sides, with which they partially overlap the cutouts 37 in such a way that although a transverse rod 7 can be inserted into the receptacle 38, it is prevented from sliding upwards out of the receptacle.
  • the practical use of the claw 27 is in Figure 5 shown.
  • the tension rod 11 of the anchoring device is inserted with its bent-back tension rod part 11b into the opening 32 and rests in the recess 30 in such a way that it and thus the anchoring force R transmitted by it form an angle ⁇ (cf. Figure 2 ) forms with the longitudinal axis of the back part 28.
  • a first force is derived from the anchoring force R, which acts on the longitudinal rod 6 from above via the support surface 30, and a second force which presses against the transverse rod 7 from below via the receptacle 38. These two forces together result in the clamping force K, which press the longitudinal rod 6 and the transverse rod 7 together so tightly at their intersection that mutual displacement of the rods is excluded.
  • the invention is not limited to the illustrated embodiments.
  • the claw 27 need not be bent from a steel sheet. It could also be milled and drilled from solid, but this would result in significantly higher manufacturing costs.
  • the claw could also be welded together from several parts or made as a casting.
  • a full-surface panel for example a closed sheet metal, could also be used in the formwork.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Claims (2)

  1. Coffrage perdu destiné à la construction en béton, avec une paroi de coffrage (1) et un dispositif d'ancrage arrière (10) en forme de tige, pouvant être couplé avec une première extrémité comprenant une armature statique (5) ou un ancrage au sol et avec une seconde extrémité comprenant la paroi de coffrage (1), et pouvant être immobilisé au moyen d'un tendeur à excentrique (14) du coffrage perdu,
    dans lequel le dispositif d'ancrage arrière (10) présente deux tirants (11, 12) se chevauchant entre les deux extrémités (11a, 12a) et dont le premier (11) forme la première extrémité (11a) et le second (12) forme la seconde extrémité (12a), et le tendeur à excentrique (14) est fixé à l'un (11) des tirants dans la région de chevauchement (13) des tirants (11, 12) et accueille l'autre tirant (12) de manière à ce qu'il puisse être déplacé et de manière à ce qu'il puisse être bloqué grâce à l'excentrique.
  2. Coffrage selon la revendication 1,
    dans lequel le tendeur à excentrique (14) est fixé au tirant (11) associé de sorte qu'il pointe vers le bas à partir du tirant (11) lorsque le coffrage est en place.
EP18193133.8A 2017-09-15 2018-09-07 Coffrage perdu pour constructions en béton Active EP3456902B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017216383.6A DE102017216383A1 (de) 2017-09-15 2017-09-15 Verlorene schalung für den betonbau

Publications (2)

Publication Number Publication Date
EP3456902A1 EP3456902A1 (fr) 2019-03-20
EP3456902B1 true EP3456902B1 (fr) 2021-07-07

Family

ID=63528574

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18193133.8A Active EP3456902B1 (fr) 2017-09-15 2018-09-07 Coffrage perdu pour constructions en béton

Country Status (2)

Country Link
EP (1) EP3456902B1 (fr)
DE (1) DE102017216383A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111779269A (zh) * 2020-06-30 2020-10-16 晟通科技集团有限公司 拉片固定结构
DE102021104831A1 (de) 2021-03-01 2022-09-01 Fwr Solutions Gmbh Dehnfugenschalung mit Spannvorrichtung
CN113106818B (zh) * 2021-03-03 2022-11-08 中国五冶集团有限公司 一种混凝土浇筑钢模板可调式活动支腿工具的制作方法
CN114411505A (zh) * 2021-12-23 2022-04-29 中国建筑土木建设有限公司 一种可调节式水稳模板支护装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1434352A (en) * 1919-12-04 1922-10-31 Gordon A Ramsay Building construction clip
GB371839A (en) * 1931-01-27 1932-04-27 Hubert Charles Johnson Support and clip for concrete reinforcements and the like
DE882304C (de) * 1950-09-23 1953-07-06 Hans Ruch Auf einer Seite einer Schalungswand angesetzte Klemmvorrichtung
NL7806813A (nl) * 1978-06-23 1979-12-28 Drentsch Overijselsche Houthan Stellat en metalen klemorgaan, geschikt voor toepassing bij de stellat.
JPH0347076Y2 (fr) * 1986-03-31 1991-10-07
KR100342141B1 (ko) * 1999-04-09 2002-06-27 박준욱 지보공용 받침금구
FI121678B (fi) * 2004-12-09 2011-02-28 Teraespeikko Oy Lävistysraudoite
EP2157260B1 (fr) 2008-08-19 2017-05-10 FWR Solutions GmbH Coffrage doté d'un dispositif d'ancrage arrière
DE202009004804U1 (de) 2009-05-12 2010-10-14 Peca-Verbundtechnik Gmbh Schalungssystem
DE202009015679U1 (de) * 2009-12-01 2011-04-14 Peca - Verbundtechnik Gmbh Abschalelement für Betonplatten
DE102013220854A1 (de) * 2013-10-15 2015-04-16 Fwr Solutions Gmbh Schalung für den Betonbau

Also Published As

Publication number Publication date
EP3456902A1 (fr) 2019-03-20
DE102017216383A1 (de) 2019-03-21

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