EP0392336B1 - System zur Verwendung beim Aufbau von Betonschalungen - Google Patents

System zur Verwendung beim Aufbau von Betonschalungen Download PDF

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Publication number
EP0392336B1
EP0392336B1 EP90106462A EP90106462A EP0392336B1 EP 0392336 B1 EP0392336 B1 EP 0392336B1 EP 90106462 A EP90106462 A EP 90106462A EP 90106462 A EP90106462 A EP 90106462A EP 0392336 B1 EP0392336 B1 EP 0392336B1
Authority
EP
European Patent Office
Prior art keywords
thread
supporting parts
threads
tensioning elements
parts
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.)
Expired - Lifetime
Application number
EP90106462A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0392336A1 (de
Inventor
Walter Hoff
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0392336A1 publication Critical patent/EP0392336A1/de
Application granted granted Critical
Publication of EP0392336B1 publication Critical patent/EP0392336B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/06—Tying means; Spacers ; Devices for extracting or inserting wall ties
    • E04G17/065—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning
    • E04G17/0655—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts
    • E04G17/0658—Tying means, the tensional elements of which are threaded to enable their fastening or tensioning the element consisting of several parts remaining completely or partially embedded in the cast material

Definitions

  • the invention relates to a concrete formwork system according to the preamble of claim 1.
  • a correspondingly long tensioning rod which runs from one side to the other through the formwork.
  • a plastic tube is pushed onto the tension rod, on the ends of which cones are placed, which come to rest on the formwork walls.
  • the parts of the relevant tensioning rod that protrude from the formwork on both sides are used to attach those parts, such as shims, clamping nuts, etc., with which the formwork is tensioned.
  • tensioning the idea of recovering the tensioning rod when dismantling the formwork after the concrete had set played an important role.
  • the bracing process has a number of problems.
  • the plastic pipes delivered in longer lengths are cut accordingly on the construction site, the separate cones have to be put on, the spacer made on site has to be pushed onto the tensioning rod and this has to be threaded into the formwork.
  • the cones When removing formwork, the cones have to be removed, the open ends of the plastic pipe have to be closed separately and the remaining conical openings have to be greased with mortar.
  • EP-A-00 16 468 it is known to incorporate into the formwork in a building wall to be cast from concrete for technical systems, for example nuclear power plants, fastening elements from a threaded rod and threaded sockets for the later attachment of pipelines or other system parts.
  • a device for mutually bracing and spacing two formwork walls has also been proposed (DE-B-12 88 779), in which a central anchor part is formed from two parallel pieces of metal wire. Their ends are received by recesses in head pieces, which are made of plastic and have a blind hole between the wire ends for screwing in a clamping screw. Because of its low resilience, such a concept could not find its way into practice.
  • the object of the invention is to show a way that takes into account existing difficulties and inadequacies in the construction of concrete formwork, in particular in order to facilitate the operations to be carried out, to simplify these and the preparatory work and to be able to meet accuracy requirements as well as possible.
  • the invention also strives for advantageous designs of the elements used in detail.
  • Other related problems with which the invention is concerned deals, result from the respective explanation of the solution shown.
  • the invention provides that the support parts are made of cast stainless steel and have blind hole-like screw threads for the clamping elements, the cross-sectional centers of the screw threads for the clamping elements and the internal thread for the ends of the respective anchor rod are on the same longitudinal axis, and that the anchor rods with the Support parts are produced as ready-to-use units with a fixed connection of the support parts to the anchor rod, the end faces of the support parts being at a fixed distance from one another given by the manufacture of the unit and corresponding to the desired spacing of the formwork walls, and wherein the units introduced into the formwork after Setting of the concrete poured into the formwork should be left completely in it.
  • a particularly important advantage is that there are no large openings in the concrete after stripping, so that the time-consuming work of lubricating such openings is eliminated. Nevertheless, the concrete has an integrity that does not require rework.
  • the supporting parts are expediently matt on their end faces and can be color-matched to the concrete. If there is a desire to close the small thread ends that are open on the end faces of the support parts, this can be achieved with a quick-insert stainless steel stopper.
  • the plug has a thread so that it can be screwed into the screw-in thread of the support parts.
  • the screw-in threads of the support parts remain easily accessible, if necessary after removing a stopper, so that they can be used as anchor or fastening points for work to be carried out later on the building. This is another important advantage.
  • the length of the outer tie rods required for the construction of the formwork and for tensioning the same can be adjusted and kept in stock.
  • the use of very long bars, such as the through-tension method, which necessarily protrude far on thin walls, narrow the working area and can lead to injuries, is eliminated.
  • the support parts expediently have a matt or rough surface, at least on their circumference, which further improves the adhesion in the concrete.
  • a surface can be caused by the casting process, but can also be reinforced in other ways, in particular also by immersing the support part in a suitable coating material.
  • the support parts advantageously have an external shape that differs from a rotationally symmetrical shape, so that security against rotation is achieved if this is desired.
  • the external shape can e.g. be polygonal or have another non-circular contour, in particular also lateral projections or the like. exhibit.
  • the support parts each have a threaded hole ending as a blind hole, into which the relevant end of the anchor rod can be screwed.
  • Securing the connection of the support parts to the anchor rod can be effected in various ways, in particular by pressing, squeezing or the like. of the support parts on the ends of the anchor rod.
  • the invention provides threads with a pitch of 6 mm for the clamping elements and for the screw-in thread of the support parts.
  • a thread has the advantage that it is largely insensitive to influences that could loosen the connection. This is essential for use in formwork construction and for handling such parts on the construction site.
  • the associated parts or their threads can be kept shorter in the case of bars with such a thread than in the larger thread pitches conventionally used. Finally, there is also a more precise adjustability.
  • Such a thread is particularly well suited for all screw connections that are to be carried out when erecting and dismantling concrete formwork with tension rods, anchor rods and the parts assigned to them. This applies among other things for the creation and loosening of these threaded connections as well as with regard to the load-bearing capacity and also largely insensitivity to the effects occurring on the building.
  • the radius of the circular arc contour of the base area is advantageously approximately 1.4 mm, although other values are also not excluded.
  • a radius of approximately 1.0 mm is favorable for the circular arc contour of the transition area. However, other values can also be considered.
  • a dimension can be referred to as the head width of the thread, that between the intersection points of tangents at turning points of the profile or such corresponding intermediate parts can be measured with extensions of the straight line of the head contour.
  • the head width is approximately 2.6 mm. However, other values are not excluded here either.
  • the respective angle between a tangent to a turning point or a corresponding intermediate section of the profile and a radius line or a perpendicular to the straight line of the head contour is advantageously approximately 30 °.
  • the invention provides threads with external diameters of approximately 17 mm, 23 mm and 29 mm for clamping elements and for screw-in threads of the support parts.
  • the core diameter of a thread for clamping elements and for screw-in threads of the supporting parts is - especially in the case of the aforementioned outer diameters - advantageously about 14 mm or 20 mm or 26 mm.
  • a spacer which forms a finished unit 1 for installation in a formwork.
  • An anchor rod 2 is fixedly connected at its ends to support parts 3, each of which has a collar 8 and their end faces 4 are intended for direct contact with the walls of the formwork to be erected.
  • the distance A of the end faces 4 determined during the manufacture of this unit 1 is thus equal to the desired distance of the formwork walls to be erected and thus the thickness of the wall to be concreted.
  • the support parts 3 are each provided with a corresponding thread in blind holes (cf. thread 9 in FIGS. 3, 5, 7 and 9), so that they can be screwed to the anchor rod 2 during the manufacture of the unit 1.
  • the final securing of the position of the parts relative to one another can then take place in particular by pressing the support parts 3 with the anchor rod 2.
  • the latter is the case in the embodiment according to FIG. 1.
  • the number 6 indicates deformation points caused by a tool attack. A slight squeezing or pressing of the support part is sufficient to achieve a secure cohesion.
  • Each support part 3 is also provided in a blind hole open to its end face 4 with a screw thread 7 for a clamping element.
  • the thread 7 and the corresponding thread of the tensioning element can be of the same type as the external thread 2 of the anchor rod 2. In particular, it is a suitable internal thread for the external thread shown in FIG. 2.
  • a unit 1 of the embodiment shown in FIG. 1 forms the spacer between two formwork walls S1, against which the support parts 3 bear directly.
  • the anchor rod 2 can additionally be provided with a water barrier in the form of a plate 14 which e.g. is attached to the anchor rod by welding.
  • the support part 3 is shown in section, so that the blind hole with the thread 9 for the anchor rod 2 and the blind hole with the thread 7 for the tie rod 17 can be seen.
  • Solid wall girders T rest on the outer sides of the formwork walls S1.
  • U-profile supports P are attached to their outer sides, against which a plate wing nut 15 supports.
  • This is screwed onto a tie rod 17, which has the same thread 5 as the anchor rod 2.
  • the arrangement of the parts is the same on the other side of the formwork.
  • the tie rod 17 is screwed into the screw thread 7 of the support part 3.
  • the formwork is tensioned with the plate wing nuts 15.
  • FIGS. 5 and 6 A modified embodiment of a support part 21 is shown in FIGS. 5 and 6.
  • a front collar 8 the outside of which gives the end face 4 for abutment against a formwork wall.
  • the part of the support body 21 which adjoins the collar 8 has two strip-shaped projections 22 at diametrically located locations.
  • the screw-in thread for a tensioning element in the blind hole of the supporting part which is open towards the front side 4 is also designated here by the number 7.
  • the supporting part 23 has a square shape 24 in its main body adjoining the collar 8, as particularly shown in FIG.
  • FIG. 9 shows a further exemplary embodiment of a support part 25 with a screw thread 7 for a tie rod and a screw thread 9 for an anchor rod.
  • FIGS. 10 and 11 show a stopper 30 which can be made of plastic or also corrosion-resistant metal and which has a thread 31 which fits into the screw-in thread 7 of the supporting part in question, which is slightly countersunk at its beginning, so that the stopper 30 screwed into it.
  • a slot 33 or another type of key attack can be provided in the head part 32.
  • a particularly advantageous embodiment of a thread is shown in an enlarged sectional view, as it is for the clamping elements, e.g. the tension rods 5 in Figures 3 and 4, and for the screw thread 7 in the support parts, but is also advantageous for an anchor rod, at least at the ends screwable into the support parts.
  • the thread profile according to FIG. 2 has a base region 41, the contour of which is at least predominantly an arc 42 with the radius R, and a head region 43, the contour of which is predominantly formed by a straight line 44. There is a between the base area and the head area Transition area 45, which is at least partially delimited by a circular arc contour 46 with the radius r.
  • a head width is designated with the letter B. It results from the intersections of tangents 48 at turning points 47 or small straight intermediate parts between the contours 42 and 46 with extensions of the straight line 44 of the head contour.
  • the angles between the tangents 48 and radius lines are designated by the letter b.
  • the thread has an outer diameter D and a core diameter d with a profile height h as the difference between them.
  • the thread has a pitch t.
  • Such a thread is to a high degree insensitive to unfavorable effects, can be screwed easily and can absorb high loads. It is therefore particularly suitable for clamping elements, in particular of the type explained above, but can also be used advantageously for other parts in concrete construction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
EP90106462A 1989-04-08 1990-04-04 System zur Verwendung beim Aufbau von Betonschalungen Expired - Lifetime EP0392336B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911491 1989-04-08
DE3911491A DE3911491A1 (de) 1989-04-08 1989-04-08 System zur verwendung beim aufbau von betonschalungen

Publications (2)

Publication Number Publication Date
EP0392336A1 EP0392336A1 (de) 1990-10-17
EP0392336B1 true EP0392336B1 (de) 1992-10-28

Family

ID=6378199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90106462A Expired - Lifetime EP0392336B1 (de) 1989-04-08 1990-04-04 System zur Verwendung beim Aufbau von Betonschalungen

Country Status (6)

Country Link
EP (1) EP0392336B1 (en, 2012)
AT (1) ATE81879T1 (en, 2012)
DE (2) DE3911491A1 (en, 2012)
DK (1) DK0392336T3 (en, 2012)
ES (1) ES2035673T3 (en, 2012)
GR (1) GR3006192T3 (en, 2012)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4341329A1 (de) * 1993-12-03 1995-06-08 Leonhard Nasl Eingußdübel
DE19522751A1 (de) * 1995-06-22 1997-01-02 Kunz Gmbh & Co Verbindungseinrichtung für Schalungsplatten und/oder Bewehrungen einer Schalung
KR100374195B1 (ko) * 2000-02-23 2003-03-04 주식회사 길건축사사무소 건축물 벽면의 구조물 고정장치
JP3161312U (ja) * 2010-05-07 2010-07-29 麗梅 林 表面処理不要型枠の固定装置の構造
CN110080523B (zh) * 2019-06-05 2023-11-07 重庆大学 一种土木工程混凝土现浇侧模板拉模工具

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1843803U (de) * 1961-09-27 1961-12-21 Walter Hoff Abstandschalter fuer betonschalungen.
DE1869159U (de) * 1962-12-18 1963-03-21 Hans-Dieter Klaiss Spann- und spreizvorrichtung fuer betonschalungen.
FR1387270A (fr) * 1963-12-18 1965-01-29 Dispositif de serrage et d'entretoisement pour coffrages de béton
DE1288779B (de) * 1964-08-28 1969-02-06 Klaiss Hans Dieter Vorrichtung zum gegenseitigen Verspannen und Abstandhalten von zwei einander gegenueber aufgestellten Schalungswaenden
NL6807309A (en, 2012) * 1968-05-22 1969-11-25
DE1964903A1 (de) * 1969-12-24 1971-07-01 Ziefle Kg Eisenbau Albert Segment-Isolierring fuer Isolier-Rohrkupplungen und Verbindungen grosser Nennweiten
NL178438C (nl) * 1977-12-15 1986-03-17 Gerardus Van Rijn Kegel die met een bijbehorende stang te gebruiken is als afstandshouder voor betonbekistingswanden.
DE2853349C2 (de) * 1978-12-11 1982-11-04 Walter 4000 Düsseldorf Hoff Sperrvorrichtung
DE2911157A1 (de) * 1979-03-22 1980-10-16 Babcock Brown Boveri Reaktor Gebaeudewand aus beton mit darin eingegossenen befestigungselementen und verfahren zur herstellung einer solchen gebaeudewand

Also Published As

Publication number Publication date
EP0392336A1 (de) 1990-10-17
DK0392336T3 (da) 1993-02-22
DE59000388D1 (de) 1992-12-03
ES2035673T3 (es) 1993-04-16
ATE81879T1 (de) 1992-11-15
DE3911491A1 (de) 1990-10-11
GR3006192T3 (en, 2012) 1993-06-21

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