EP1447496B1 - Reusable modular formwork for making columns - Google Patents

Reusable modular formwork for making columns Download PDF

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Publication number
EP1447496B1
EP1447496B1 EP04002408.5A EP04002408A EP1447496B1 EP 1447496 B1 EP1447496 B1 EP 1447496B1 EP 04002408 A EP04002408 A EP 04002408A EP 1447496 B1 EP1447496 B1 EP 1447496B1
Authority
EP
European Patent Office
Prior art keywords
modular
ribs
edge
edge ribs
formwork
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
EP04002408.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1447496A3 (en
EP1447496A2 (en
Inventor
Loris Pegoraro
Mirko Pegoraro
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.)
Geoplast SpA
Original Assignee
Geoplast SpA
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
Priority claimed from ITPD20030026 external-priority patent/ITPD20030026A1/it
Priority claimed from ITPD20030235 external-priority patent/ITPD20030235A1/it
Priority claimed from ITPD20030259 external-priority patent/ITPD20030259A1/it
Priority claimed from ITPD20030258 external-priority patent/ITPD20030258A1/it
Application filed by Geoplast SpA filed Critical Geoplast SpA
Priority to SI200432390T priority Critical patent/SI1447496T1/sl
Publication of EP1447496A2 publication Critical patent/EP1447496A2/en
Publication of EP1447496A3 publication Critical patent/EP1447496A3/en
Application granted granted Critical
Publication of EP1447496B1 publication Critical patent/EP1447496B1/en
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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
    • E04G13/023—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor with means for modifying the sectional dimensions
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
    • 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
    • E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
    • E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
    • E04G13/021—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor for circular columns
    • 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
    • E04G17/001—Corner fastening or connecting means for forming or stiffening elements
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G2009/028—Forming boards or similar elements with reinforcing ribs on the underside

Definitions

  • the present invention concerns a reusable modular formwork according to the preamble of claim 1.
  • Pre-shaped circular formworks in cement/concrete or in cardboard are currently used for making columns with a circular section.
  • Circular cement/concrete formworks are generally made of a cement or concrete tube with a suitable diameter, installed vertically, into which the reinforcement is inserted and the concrete is cast.
  • the cement or concrete tube thus forms the outermost part of the finished column.
  • Concrete tubes are very heavy and thick, and their installation requires the use of cranes or of lifting machines.
  • Concrete tubes may crack or even break, both in transport and during installation.
  • Concrete tubes are very thick and this limits the positioning of the column reinforcement and forces users to make columns with a diameter larger than necessary.
  • Cardboard circular formworks are composed of a cardboard tube with limited thickness, treated internally with detaching substances or varnishes, so as to prevent the concrete from sticking to the tube itself.
  • the cardboard tube is installed vertically, then the column reinforcement is positioned inside it and the concrete is cast.
  • the cardboard tube has low structural rigidity, as a result the formwork made of cardboard tube must be stabilised with an external structure.
  • Periodic maintenance against rust is required and, because of their weight, they are a constant risk for workers. They may also deteriorate, with risk of injury, aggravated by the presence of rust.
  • Reusable modular formworks are known, made of plastic material, for making concrete or reinforced concrete structures.
  • These elements are composed of flat walls, with various dimensions, which can be fitted together at right angles and are suitable mainly for making concrete structures with flat surfaces.
  • US5255888A discloses the preamble of claim 1.
  • a new reusable modular plastic formwork has been designed and implemented according to claim 1.
  • the aim of the new reusable modular formwork is to carry out formworks with a circular section which may be easily assembled and dismantled to adapt them to the various static and dimensional requirements.
  • Another aim of the new reusable modular formwork is to be light and stable, that is, with no need of further external support structures.
  • Another aspect of the new reusable modular formwork that is not covered by the present invention is to be able to be used for various sizes of pillars with circular, elliptical, square or rectangular section, with simple applications of reduction inserts.
  • Another aim of the new reusable modular formwork is to allow rapid dismantling and storage of the modular formwork. These and other direct and complementary aims are achieved through the implementation of the new reusable modular formwork for making columns with the respective closing key, comprising modular panels and one or more closing keys.
  • Said panel is semicircular and it is made of plastic, it has a smooth concave internal side and presents on the convex external side various stiffening ribs, both along its perimeter and equidistantly spaced on its wall.
  • Two or more modular elements are coupled to form a circular portion of formwork and they are fastened together by means of the closing keys inserted and turned in the aligned holes of said two coupled modular elements.
  • Several portions of modular elements are stacked to obtain the modular formwork of the necessary height and fastened together by means of said closing keys.
  • suitable inclined surfaces present on the ribbing of the modular elements, in correspondence with the holes and/or on the radial ridges of the closing keys, prevent the involuntary rotation of the closing keys and the separation of the various modular elements, allowing the elements to be fixed together.
  • said L- or U-shaped panel or modular element made of plastic, has the internal sides made of smooth walls as the bottom of the formwork and, on the external side, it presents various stiffening ribs, preferably equidistant, both along its perimeter and on the wall.
  • the closing keys are composed of a cylindrical body having at one end a handgrip, preferably at a right angle to said body, and at the opposite end two or more radial ridges, and they are preferably placed at regular intervals.
  • Two modular elements are coupled in opposite positions to form a square or rectangular portion of formwork and they are fastened together by means of strapping, or preferably with the closing keys, inserted and turned in the aligned holes of said coupled modular elements.
  • Several portions of modular elements are stacked to obtain the formwork of the necessary height and fastened together by means of said closing keys.
  • two full-height composite half shells are tightened together, after being coupled around the reinforcing rods of the pillar.
  • Figures 1, 2, 3 illustrate respectively two orthogonal views and an axonometric view of a modular element (M) for making circular columns.
  • the modular element (M) comprises a semicircular panel, made of plastic material, equipped on the convex external side (M2) with various stiffening ribs (Mn, Mo).
  • Said ribs are evenly distributed all over the surface of the convex side (M2) of the modular element (M).
  • Some ribs (Mo), later called edge ribs (Mo), are placed along the perimeter of the panel of the modular element (M) and have greater thickness and height than the intermediate ribs (Mn).
  • edge ribs constitute a coupling surface with further modular elements (M) coupled to make the circular shape, and others coupled in alignment and continuation.
  • These holes (Mf) are set along the edge ribs (Mo) in such a way that, when the various modular elements (M) are coupled or aligned, said holes (Mf) are perfectly aligned and regularly spaced.
  • the surface of the concave internal side (M1) of the new modular element is smooth and is preferably treated in such a way as to prevent the adhesion of concrete.
  • the various modular elements (M) are joined with closing keys (C) as can be seen in figure 4 or according to an aspect not covered by the present invetion with cones, pins, wedges, pegs, straps.
  • the closing key (C) according to an aspect not covered by the present invention is composed of a cylindrical body (C1) with, at one end, a handgrip (C2) and at the opposite end two or more radial ridges (C3).
  • the body (C1) of the closing key (C) has a generically cylindrical shape, with diameter equal to the diameter of the holes (Mf) in the edge ribs (Mo) of the modular element (M) and length greater than the thickness of two edge ribs (Mo).
  • said body (C1) has an end portion (C11), close to the handgrip (C2), with diameter greater than the rest of the body (C1).
  • the handgrip (C2) At one end of the body (C1) is the handgrip (C2), that is, a portion at a right angle to the body (C1) which may also have ridges (C21) to ensure a good grip.
  • radial ridges At the opposite end of the body (C1) there are two or more radial ridges (C3), diametrically opposite and preferably having the form of a ring-shaped segment. These radial ridges (C3) have length and width such as to pass through the grooves (Mf1) of the holes (Mf) in the edge ribs (Mo) of the modular element (M) when the closing key (C) is inserted in said holes (Mf).
  • the stable union of the various coupled modular elements (M) is accomplished by inserting said closing key (C) in the holes (Mf) in the coupled edge ribs (Mo) of the modular elements (M), so that according to an aspect not covered by the present invention the radial ridges (C3) of said closing keys (C) pass through both the holes (Mf), and turning said closing keys (C) so that said radial ridges (C3) are not aligned with the grooves (Mf1) of said holes (Mf).
  • closing keys (C) allow either the union of two modular elements (M) coupled to constitute a tube or the union of modular elements (M) aligned to make the continuation or extension of each other simply by inserting each closing key (C) in the aligned holes (Mf) of the elements (M) placed next to each other and turning it.
  • slots or holes located as close as possible to the curved surface or the seats (Sr) for passing or positioning the straps.
  • the distance between the keys is preferably modular, while the distance between the end keys and the edge is preferably equal to half the module.
  • the reusable modular element (M) and the respective closing key (C) constituted as described above make it possible to rapidly obtain formworks for circular columns and offer considerable advantages as regards stability, duration and safety.
  • FIG 4 shows four modular elements (M) according to the invention assembled together and tightened with the keys (C).
  • a modular element (M) for making square or rectangular columns is not covered by the present invention.
  • Such a modular formwork (M) comprises a panel, made of plastic material, having L-shaped section with coupling surfaces (Me) inclined at 45° with respect to the planes (M1), for coupling with an identical modular element (M).
  • This modular element (M) has various stiffening ribs (Mn, Mo) on the external side (M2).
  • Said ribs (Mn, Mo) are distributed all over the surface of the external side (M2) of the modular element (M).
  • edge ribs are placed along the perimeter of the panel of the modular element (M) and are preferably thicker and with a bigger height than the intermediate ribs (Mn).
  • edge ribs constitute a resting or coupling surface with further coupled or continuing modular elements (M).
  • edges ribs (Mo) there are holes (Mf), preferably having circular shape and provided with two or more grooves (Mf1) in diametrically opposite positions. These holes (Mf) are set along the edge ribs (Mo) at regular intervals and in such a way that, when the various modular elements (M) are coupled or aligned, the corresponding holes (Mf) of identical coupled elements (M) are perfectly aligned.
  • the distance between the last holes (Mf), along each edge rib (Mo), and the end of the rib (Mo) itself, is less, preferably half, than the distance between the other holes (Mf) along said rib (Mo) of the modular element (M).
  • ribs (Mo) there may be seats, for example hollows, slots or holes (Rf), for passing closing straps, according to an aspect not covered by the present invention.
  • the surface of the concave internal side (M1) of the new modular element (M) is smooth and is preferably treated in such a way as to prevent the adhesion of concrete.
  • modular elements (M) having different dimensions, so as to make it possible to obtain square columns, for example 30x30, or 35x35, or 40x40, etc., or rectangular columns, for example 30x35, 35x45, 30x40, etc.
  • modular elements (M') having L-shaped section and the coupling surfaces (M'e) respectively one at a right angle to and one aligned with the corresponding side of the L-shaped section, or modular elements (M") having U-shaped section and the coupling surfaces (M"e) at right angles to the two ends of the U-shaped section.
  • the modular element with orthogonal walls and L-shaped section may have both coupling surfaces (M'e) of each wall either at right angles or aligned with the corresponding wall of the L-shaped section for coupling with a respective modular element (M).
  • the union between the various modular elements (M) may be accomplished with straps, according to an aspect not covered by the present invention, or according to the invention with the closing keys (C).
  • a cross section of an insert (X) with a generic U section according to an aspect not covered by the present invention can be applied to the internal surface (M1) of a modular element (M), so as to allow columns with smaller dimensions to be obtained.
  • Said insert (X) presents, on its shorter sides (Xm), ridges (Xr) and holes or concave seats (Xo) such as to join two opposing inserts (X).
  • a cross section of an insert (Y) shaped like a panel, according to an aspect not covered by the present invention can be applied to the internal surface (M1) of a modular element (M), so as to allow rectangular columns to be obtained using elements (M) for square columns.
  • spacers (D) may be used, suited to maintain said inserts (Y) correctly positioned in the internal concave surface (M1) of the modular elements (M).
  • a cross section of an insert (Z) according to an aspect not covered by the present invention can have a L-shaped section.
  • Said insert (Z) presents, on its sides (Zm) and/or on the end of its sides (Zm), ridges (Zr) and holes or concave seats (Zo) such as to join exactly two opposing inserts (Z).
  • said insert (Z) it is possible for said insert (Z) to have one side (Z1) of its L-shaped section with different thickness with respect to the other side (Z2).
  • a cross section of an insert (E), according to an aspect not covered by the present invention can be applied to the internal surface (M1) of a new modular element (M), suited to obtain columns with octagonal section.
  • a cross section of an insert (F) according to an aspect not covered by the present invention can have an internal surface (F1) in the shape of an arc of a circle for making pillars with elliptical and circular section using the same square formwork (M).
  • Said insert (F) presents, at its ends, ridges (Fr) and holes or concave seats (Fo) such as to join exactly two opposing inserts (F).
  • said insert (F) prefferably has the internal surface (F1) with different section, for example elliptical, so as to be able to make elliptical columns.
  • a cross section of an insert (R), according to an aspect not covered by the present invention can be applied to the internal surface (M1) of a new modular element (M), suited to allow columns having substantially rectangular or square section with rounded or bevelled corners to be carried out.
  • the reusable modular element (M) and the respective closing key (C) constituted as described above make it possible to carry out formworks for square, rectangular columns, or columns of any other shape that can be contained according to an aspect not covered by the present invention.
  • the modular elements of the invention (M) are light, impact-resistant, easily transported and easily assembled by simply inserting and turning the closing keys (C) in the coupled edge ribs (Mo).
  • the modular elements (M) allow the rapid dismantling of the reinforcement, which can be carried out by simply turning and extracting the closing keys (C) that hold the modular elements (M) together.
  • the formworks obtained with the modular elements (M) and the closing keys (C) described above do not need specific external structures to maintain the alignment of the entire formwork since, thanks to the keys, said elements are held together, obtaining a tubular structure that is very stable during casting.
  • the various inserts (I, X, Y, Z, F, R, E), that are not covered by the present invention and are applicable to the new modular elements also make it possible to obtain columns with different shapes and dimensions with respect to those of the element (M), for example rectangular, circular or elliptical with sharp, rounded or bevelled corners, or columns having the same shape, but smaller dimensions.
  • a modular element (M) can contain according to an aspect not covered by the present invention 2 inserts (I) for making reinforced concrete pillars with smaller diameter.
  • An insert (I) not covered by the present invention is constituted of two semicircular panels (P), each having an arched wall (Ia) with ribs (In) behind it. Indicated with (Is) and (Ir) are the seats and ridges for the reciprocal coupling of two panels (P) which make up the insert (I), contained and held in the elements (M).

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)
EP04002408.5A 2003-02-13 2004-02-04 Reusable modular formwork for making columns Expired - Lifetime EP1447496B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200432390T SI1447496T1 (sl) 2003-02-13 2004-02-04 Znova uporabni modularni opaž za izdelavo stebrov

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
ITPD20030026 2003-02-13
ITPD20030026 ITPD20030026A1 (it) 2003-02-13 2003-02-13 Cassero modulare riutilizzabile e relativa chiave
ITPD20030235 ITPD20030235A1 (it) 2003-10-07 2003-10-07 Cassero modulare riutilizzabile per la realizzazione di colonne circolari
ITPD20030235 2003-10-07
ITPD20030259 ITPD20030259A1 (it) 2003-10-24 2003-10-24 Cassero modulare riutilizzabile per la realizzazione di
ITPD20030259 2003-10-24
ITPD20030258 2003-10-24
ITPD20030258 ITPD20030258A1 (it) 2003-10-24 2003-10-24 Cassero modulare riutilizzabile per la realizzazione di

Publications (3)

Publication Number Publication Date
EP1447496A2 EP1447496A2 (en) 2004-08-18
EP1447496A3 EP1447496A3 (en) 2005-04-27
EP1447496B1 true EP1447496B1 (en) 2017-04-26

Family

ID=32686159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002408.5A Expired - Lifetime EP1447496B1 (en) 2003-02-13 2004-02-04 Reusable modular formwork for making columns

Country Status (3)

Country Link
EP (1) EP1447496B1 (sl)
ES (1) ES2627554T3 (sl)
SI (1) SI1447496T1 (sl)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20040316A1 (it) * 2004-12-17 2005-03-17 Geoplast Srl Cassero modulare monolitico riutilizzabile per la realizzazione di colonne quadre o rettangolari
KR200446475Y1 (ko) * 2009-08-04 2009-11-04 최은수 원형 또는 타원형 콘크리트 기둥을 시공하기 위한 보조거푸집
BE1022928A9 (nl) * 2015-06-29 2016-11-30 Houtland Beton Nv Werkwijze voor het vervaardigen van een betonkolom
CA3088628C (en) * 2017-01-18 2023-04-25 Create A Castle, LLC Systems, devices, and methods for molding structures
US11408187B2 (en) * 2017-01-18 2022-08-09 Create A Castle, LLC Mold systems having a separation tool for molding structures
CN108756226A (zh) * 2018-05-23 2018-11-06 江苏无锡二建建设集团有限公司 圆形柱模板施工工艺
CN108756238A (zh) * 2018-08-21 2018-11-06 福建海源新材料科技有限公司 一种成本更低的高强度手柄连接件
CN110259115B (zh) * 2019-05-29 2021-07-27 重庆市叁柒幺信息科技有限公司 一种用于房地产施工的混凝土模板
CN111411776B (zh) * 2020-04-02 2024-05-17 中建八局第二建设有限公司 一种圆柱模板支设构造
CN111794499B (zh) * 2020-07-22 2022-07-01 广元市永昌建设有限公司 一种具有纤维布加固层的混凝土柱模具及其使用方法

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US3021586A (en) * 1959-02-03 1962-02-20 Fernando J Uruburu Concrete mold forms
US3260493A (en) * 1963-11-07 1966-07-12 George S Beckham Concrete form
GB1137230A (en) * 1966-04-26 1968-12-18 Bombrini Parodi Delfino S P A Modular element mould for concrete structures
US5255888A (en) * 1991-06-07 1993-10-26 Deslauriers, Inc. Concrete column form
PT102875B (pt) * 2002-11-22 2005-02-28 Civilplas Aplicacoes Modulares Cofragem para construcao civil

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Also Published As

Publication number Publication date
EP1447496A3 (en) 2005-04-27
SI1447496T1 (sl) 2017-08-31
EP1447496A2 (en) 2004-08-18
ES2627554T3 (es) 2017-07-28

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