WO2013191532A1 - Coffrage réglable pour poutre courbée - Google Patents

Coffrage réglable pour poutre courbée Download PDF

Info

Publication number
WO2013191532A1
WO2013191532A1 PCT/MY2013/000113 MY2013000113W WO2013191532A1 WO 2013191532 A1 WO2013191532 A1 WO 2013191532A1 MY 2013000113 W MY2013000113 W MY 2013000113W WO 2013191532 A1 WO2013191532 A1 WO 2013191532A1
Authority
WO
WIPO (PCT)
Prior art keywords
panels
panel
formwork
crosspiece
fasteners
Prior art date
Application number
PCT/MY2013/000113
Other languages
English (en)
Inventor
Chin Chai Ong
Original Assignee
Bombadiar Dynaform International Ltd
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 Bombadiar Dynaform International Ltd filed Critical Bombadiar Dynaform International Ltd
Priority to BR112014010014A priority Critical patent/BR112014010014A2/pt
Publication of WO2013191532A1 publication Critical patent/WO2013191532A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
    • 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
    • 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
    • E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor

Definitions

  • the present invention relates to an adjustable formwork for casting a smooth curved beam.
  • the formwork enables a curved beam with a tight curvature to be produced.
  • Formwork is an ancillary construction that is employed as a mould to form a structure. Structures with a smooth curvature are particularly difficult to be formed compared to straight structures as the formwork used to mould the curve structure has to be flexible in order to be bent into a desired curvature for the curved beam to be cast. Curved structures are especially important in constructions such as monorail guiderail beams, bridge arches, curved facades and domes.
  • U.S. Patent No. 5492303 One of the prior arts that disclose an apparatus and method to form a curved surface is U.S. Patent No. 5492303.
  • This patent introduces a formwork for surfaces varying in curvature that includes a face sheet adjustable with respect to its curvature.
  • the face sheet is supported by girders connected to individual boom members of a boom system. Adjustment of the curvature of the face sheet is carried out by altering the effective length of the boom members between the girders.
  • U.S. Patent No. 4619433 describes an apparatus for erection of accurate walls of poured concrete.
  • the apparatus has deformable sheathings locked to tamable supports that are movably secured to each other by girders.
  • the girders are equipped with alternating rigid variable-length links and fixed-length connectors to connect to the supports. By changing the length of the links, the angular positions of the supports could be changed as well.
  • Japan Patent No. 07-251415 discloses the application of jack devices with predetermined pitches that are installed at the longitudinal sides of a pair of side formworks for exerting forces to the formwork to form a curved beam.
  • Each jack devices is driven by a drive device whereby the driving speed of the drive device that is controlled by a control device determines the shape of the curvature.
  • the panels of the formwork shall possess a thin skin that is sufficiently flexible in its longitudinal plane and adequately rigid to retain concrete filled within the space in between the formwork panels.
  • Such panels and the mechanism of the formwork shall enable the formation of a very small radius of curvature such that the formwork is capable of deforming elastically by being able to return to its original shape when the force that is exerted to deform the panel is released.
  • the main aspect of the present invention is to provide an adjustable formwork for casting a curved beam that could have a tight curvature.
  • Yet another aspect of the present invention is to provide a formwork for casting a curved warped beam with two different radius ⁇ to the long main axis.
  • the embodiment of the present invention describes a formwork (100) for casting a curved beam (111) comprising a first panel (101a) and a second panel (101b), which are vertically raised and arranged in an opposing position, defining a hollow space in between the opposing inner surface of the panels (101) for casting the beam (111); a plurality of crosspiece (102) mounted on the outer surface of the panels (101) and horizontally extending from one edge to another edge of the panel (101) that each crosspiece (102) is spaced apart from each other in a substantially equal distance; a plurality of horizontally spaced tracks (103) fabricated on each of the crosspiece (102), whereby position of the tracks (103) of each crosspiece (102) are substantially identical; a plurality of fasteners (104), each defined by an elongate body with a first tip for engaging onto each of the track (103) and a second tip for connecting to a force generator (106); and a plurality of fasteners (104), each defined by an elongate body with a first tip for
  • Figure 1 is a perspective view of a panel of the formwork.
  • Figure 2 is a perspective view of the formwork with the force generator fixed to a plurality of rigid points.
  • Figure 3 is illustrates a section of the panel showing the elements involved in the mechanism that allow the plate to deform into a curvature.
  • Figure 4 is a perspective view of the formwork with the reinforcing steel structure of the beam to be cast positioned in between the panels of the formwork.
  • Figure 5 shows the internal view of a beam.
  • Figure 6 shows a curved beam that could be produced by the present invention.
  • Figure 7 is a top view of a curved beam with a transition curve section in the middle of straight section and a radial curve section.
  • the present invention discloses a formwork (100) for casting a curved beam (111) comprising a first panel (101a) and a second panel (101b), which are vertically raised and arranged in an opposing position, defining a hollow space in between the opposing inner surface of the panels (101) for casting the beam (111); a plurality of crosspiece (102) mounted on the outer surface of the panels (101) and horizontally extending from one edge to another edge of the panel (101) that each crosspiece (102) is spaced apart from each other in a substantially equal distance; a plurality of horizontally spaced tracks (103) fabricated on each of the crosspiece (102), whereby position of the tracks (103) of each crosspiece (102) are substantially identical; a plurality of fasteners (104), each defined by an elongate body with a first tip for engaging onto each of the track (103) and a second tip for connecting to a force generator (106); and a plurality of columns (105), each connecting the fasteners (104) at the upper position to the adjacent fasteners (10
  • the panels (101) are fashioned to slide against the columns (105) that are connected to the fasteners (104) through the tracks (103) to negate in-plane tension or compression when the panels (101) are shaping into a smooth curvature upon receiving a pull or push force exerted by the force generator (106) in a direction transverse to the panels (101).
  • At least two panels (101a, 101b) disposed in an opposing position as shown in Figure 2 and Figure 4 are required to form the present invention.
  • the surfaces of the panels (101a, 101b) facing one another are defined as the 'inner surfaces' while the obverse surfaces are the 'outer surfaces'.
  • the hollow space between the inner surfaces of the panels (101a, 101b) forms part of the concrete mould for the beam (111) to be cast whereas the outer surfaces are mounted and attached with elements for manipulating the curvature of the panels (101) and dictating the shape of the beam (111) to be formed.
  • the panels (101) used in the present invention possess a thin skin with a thickness of about 1.5mm to 5mm, preferably 2mm to 3mm which is attached to the crosspieces
  • FIG. 1 A detailed view of the outer surface of a panel (101) is illustrated in Figure 1.
  • a number of spaced apart crosspieces (102) are horizontally mounted on the outer surface of the panel (101).
  • the tracks (103) could be made by creating elongate horizontal openings on the crosspieces (102).
  • supportive member (107) is mounted on the top and bottom of the track (103) in one of the preferred embodiments of the present invention.
  • Vertical columns (105) are connected to at least one track (104) at the upper position to at least one track at the lower position of the panels (101) by the fasteners (104).
  • the fastener (104) has a first tip for engaging onto the track (103) and a second tip connecting to a force generator (106), wherein the fastener (104) passes through the column (105) and the second tip projects out of the outer flat surface of the column (105) in order to connect to the force generator.
  • the force generator (106) is responsible for providing pull or push force to every force exerting-point at each fastener (104).
  • the force generator (106) is a jack system formed by a number of jacks, each with a first end fastened to each column (105) for exerting the forces and a second end fixed to a point of a rigid structure (112).
  • the rigid structure (112) could be a wall as shown in Figure 2.
  • the pull or push forces exerted transversely to the panel (101) by the force generator (106) deforms the shape of the panel (101).
  • at least two columns (105) each having one force-exerting point at the upper portion and one force-exerting point at the bottom portion are required.
  • a major feature of the present invention is that it makes the formation of a smooth curvature possible without inducing in-plane tension or compression in the panels (101) that would result in an undulating dimple surface tolerance exceeding 1mm and also cracking at the crosspieces (102), construct (108) and struts (118) leading to failure of the panel (101) as it is an aim of the present invention to provide a formwork (100) with high flexibility and strength where the curvature of the panels (101) could be adjusted and deformed into a wide range of curvatures, including skews for a transition curve section (116) with a smooth surface curvature.
  • the present invention enables a curved beam (111) having a transition curve section (116) as shown in Figure 7 to be formed as the transition curve (116) is important in guiderail beam designs for introducing gradual and uniform force on a vehicle when the vehicle is traveling around a bend to ensure the safety of the passenger. Without having a transition curve section (116) to join a straight section (1 15) and radial curve section (1 17) of a beam used as a guiderai! beam, the vehicle would experience immediate sudden centrifugal force and might overturn.
  • the mechanism of the present invention functions with the track (103) providing space for the fastener ( 104) to move freely along the track ( 103) without being restricted at a certain position upon receiving forces exerted to . it by the force generator ( 106).
  • the tracks (103) permit the panels (101 ) to shape into a smooth curvature at the horizontal and/or vertical axis by sliding the panels ( 101 ) against the columns (105) during the bending process of the panels ( 101).
  • Figure 3 shows a section of the panel (101 ) where the sliding movement takes place to form a smooth curvature of the panel (101 ) whereby the in-plane of the panel (lOli) is substantially free from tension or compression.
  • the curvature of the formwork (100) is adjustable depending on the type and amount of forces applied to each force-exerting point.
  • the fastener (104) is constrained to a position and is unable to move, the in-plane tension or compression is induced causing the panel (101) to deform into localised irregular curves with sharp or uneven angles between every two force-exerting points.
  • the panel (101) is deformable to a minimum radius of curvature of 20m unlike in the formworks described in the prior arts that are unable to form radius of curvature smaller than 100m without causing damaged to the formwork (100).
  • Such tight curve enables the produced beam (111) to be used in a wide range of application requiring sharp corners especially for monorail guiderai! beam that requires a high tolerance in the surface moulding to provide a comfortable vehicular ride.
  • a suitable material used to produce the elements of the formwork (100) is steel.
  • struts (1 18) are fabricated at both longitudinal edges of the panel (101 ) on the outer surface for connecting one panel (101 ) to another panel (101) laterally.
  • the formwork (100) can be laterally extended.
  • one or more construct (108) having specific profile is detachably mounted at the inner surfaces of the panels (101).
  • FIG. 1 An example of the equipment set up for casting the beam (1 1 1 ) having a desired continuous curvature could be referred to Figure 2 and 4.
  • the formwork is placed on top of a platform (113) which is provided as a base for the beam (1 11 ) to be cast on. Therefore, a reinforcing steel structure (1 10) of the beam (111) to be cast is disposed on the platform (113) prior to the casting process.
  • the reinforcing steel structure (1 10) is constructed in a shape according to the curvature before being positioned on the platfonn (113).
  • the force generator (106) then exerts a pull or push force to ever ⁇ ' force-exerting points of the panels (101) to bend the panel (101 ) into the curvature.
  • the position of the formwork (100) is adjusted such that the space in between the panels (101) corresponds to the dimension of the beam (1 1 3 ) to be cast.
  • a sealed enclosure is formed substantially around the reinforcing steel structure (1 10) within the space as a container to hold the concrete mixture.
  • the formwork (100) further comprises two vertical formworks that are attached to the lateral ends of the formwork (100) for sealing the openings in between the two opposing panels (101 ) at each lateral end for forming the sealed enclosure.
  • Wet concrete mixture is poured into the sealed enclosure and onto the reinforcing steel structure (110).
  • a beam (H I) as depicted in Figure 5 that the reinforcing steel structure (110) is used to support the structure of the beam (111) by imparting the needed tensile strength to the prepared beam (111).
  • a curved beam (111) as shown in Figure 6 is produced in a shape according to the desired curvature. "The cured beam has increased strength and durability upon being cured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

La présente invention concerne un coffrage (100) de coulée d'une poutre courbée (111) comprenant: un premier panneau (101a) et un second panneau (101b) disposés verticalement et dans une position opposée, qui définissent un espace creux entre leurs surfaces internes opposées pour couler la poutre (111); une pluralité de traverses (102) montées sur la surface externe des panneaux (101) et s'étendant horizontalement d'un bord à un autre du panneau (101), chacune des traverses (102) étant séparée des autres par une distance sensiblement égale; une pluralité de rails (103) espacés horizontalement, ménagés sur chaque traverse (102), la position des rails (103) de chaque traverse (102) étant ainsi pratiquement identique; une pluralité de pièces de fixation (104), chacune définie par un corps allongé présentant un premier bout qui s'engage dans chacun des rails (103) et un second bout qui se raccorde à un générateur de force (106); et une pluralité de colonnes (105), chacune raccordant les pièces de fixation (104) à la position supérieure aux pièces de fixation (104) adjacentes à la position inférieure des panneaux (101). Les panneaux (101) sont façonnés de manière à glisser contre les colonnes (105) raccordées aux pièces de fixation (104), à travers les rails (103), pour neutraliser la tension ou la compression en plan lors du façonnage des panneaux (101) en une courbure lisse sous l'action d'une force de traction ou de poussée exercée par le générateur de force (106) dans une direction perpendiculaire aux panneaux (101).
PCT/MY2013/000113 2012-06-21 2013-06-20 Coffrage réglable pour poutre courbée WO2013191532A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR112014010014A BR112014010014A2 (pt) 2012-06-21 2013-06-20 forma ajustável para vigas curvas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI2012700405A MY157351A (en) 2012-06-21 2012-06-21 Adjustable formwork for curved beam
MYPL2012700405 2012-06-21

Publications (1)

Publication Number Publication Date
WO2013191532A1 true WO2013191532A1 (fr) 2013-12-27

Family

ID=49769056

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2013/000113 WO2013191532A1 (fr) 2012-06-21 2013-06-20 Coffrage réglable pour poutre courbée

Country Status (3)

Country Link
BR (1) BR112014010014A2 (fr)
MY (1) MY157351A (fr)
WO (1) WO2013191532A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862573A (zh) * 2016-06-14 2016-08-17 中铁十四局集团有限公司 一种铁路桥梁挡砟墙轻型钢模板
CN106003392A (zh) * 2016-07-04 2016-10-12 北京交通大学 一种固定线形的跨座式单轨交通预制轨道梁模板系统
CN108638301A (zh) * 2018-04-12 2018-10-12 安徽昆蒙新型建材有限公司 一种加工砖头装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06143235A (ja) * 1992-11-09 1994-05-24 Soc Civile Des Brevets De Henri Vidal 成形装置
JPH07251415A (ja) * 1994-03-15 1995-10-03 Hitachi Ltd 曲線桁用モールド装置
WO2006048652A1 (fr) * 2004-11-04 2006-05-11 John Gould Moule

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06143235A (ja) * 1992-11-09 1994-05-24 Soc Civile Des Brevets De Henri Vidal 成形装置
JPH07251415A (ja) * 1994-03-15 1995-10-03 Hitachi Ltd 曲線桁用モールド装置
WO2006048652A1 (fr) * 2004-11-04 2006-05-11 John Gould Moule

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105862573A (zh) * 2016-06-14 2016-08-17 中铁十四局集团有限公司 一种铁路桥梁挡砟墙轻型钢模板
CN106003392A (zh) * 2016-07-04 2016-10-12 北京交通大学 一种固定线形的跨座式单轨交通预制轨道梁模板系统
CN108638301A (zh) * 2018-04-12 2018-10-12 安徽昆蒙新型建材有限公司 一种加工砖头装置

Also Published As

Publication number Publication date
BR112014010014A2 (pt) 2017-04-25
MY157351A (en) 2016-05-31

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