EP0692051B1 - Floor structure including prefabricated floor units - Google Patents

Floor structure including prefabricated floor units Download PDF

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Publication number
EP0692051B1
EP0692051B1 EP94912129A EP94912129A EP0692051B1 EP 0692051 B1 EP0692051 B1 EP 0692051B1 EP 94912129 A EP94912129 A EP 94912129A EP 94912129 A EP94912129 A EP 94912129A EP 0692051 B1 EP0692051 B1 EP 0692051B1
Authority
EP
European Patent Office
Prior art keywords
beams
units
floor
base plate
mould
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
EP94912129A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0692051A1 (en
Inventor
Henry Jugas
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.)
DALA CEMENT AB
Original Assignee
AB
Dala Cement AB
DALA CEMENTVARUFABRIK AB
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 AB, Dala Cement AB, DALA CEMENTVARUFABRIK AB filed Critical AB
Publication of EP0692051A1 publication Critical patent/EP0692051A1/en
Application granted granted Critical
Publication of EP0692051B1 publication Critical patent/EP0692051B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • 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
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/18—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members for the production of elongated articles
    • 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
    • B28B7/24—Unitary mould structures with a plurality of moulding spaces, e.g. moulds divided into multiple moulding spaces by integratable partitions, mould part structures providing a number of moulding spaces in mutual co-operation
    • B28B7/241—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces
    • B28B7/246—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces for making oblong objects, e.g. girders
    • 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
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • 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
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/04—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement
    • E04B5/046—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of concrete or other stone-like material, e.g. asbestos cement with beams placed with distance from another

Definitions

  • the invention relates to floor structures comprising prefabricated floor units of reinforced concrete for mounting in a multistorey structure frame, preferably also constructed of prefabricated outer and inner wall units, of the type disclosed in the preamble of claim 1, and a process for manufacturing units included in the floor structure, in accordance with the preamble of claim 6.
  • Prefabricated floor structure units which are homogeneous or pretensioned are also known, but these have, however, a relatively high weight and have in certain cases weight-reducing grooves enclosed within each unit, thus making impossible hidden subsequent insulation of e.g. distribution boxes for electrical, telecommunications or plumbing connections.
  • SE 310 249 B describes a floor unit for assembly, which is pre-fabricated in a factory and is constructed of a concrete slab with parallel beams in the form of T-beams. The beams are anchored in the concrete slab by casting together, and the ends of the reinforcements placed in the beams are cast into the concrete slab. Open channels are formed between the beams.
  • this floor structure unit is that the T-beams are shorter than the concrete slab and thus do not reach up to the wall structures, and this will result in severe downward deflection and possibly buckling of the bottom slab next to the wall structures. Furthermore, when making joints to the wall, there is no rigidifying reinforcement at the top of the floor structure extending over each support, and this results in increased downward deflection causing discontinuous floor structures over the wall supports.
  • the purpose of the invention is therefore to provide a dry floor structure of the type described by way of introduction, which is supported by prefabricated floor units, which have a predetermined stiffness with very little sag, low weight and having open channels in the joint portions over supports and towards the topside, said units being installable in a building frame at any selected time during construction without hindering the frame assembly. It is possible to subsequently mount in the channels junction boxes for the building and, except for the joint casting, no further working, evening or adjustment is required of the installed floor structure at the site. Joint casting and top and bottom casting of the walls can be done after installation of the floor structure units several storeys up, and this has great advantages during the winter months, since the construction can quickly be roofed over, thus facilitating supply and retention of heat.
  • Each floor unit is composed of a base plate and joists securely anchored to the base plate and extending from edge to edge of the base plate and being essentially parallel to each other, and being anchored to the base plate by means extending from the portion of the joist facing away from the flange, thus forming open channels between two adjacent joists, said unit being installable in the building frame at any selected time.
  • the units are manufactured by mould casting a base plate, with high demands as regards dimensional accuracy and surface finish, in a conventional manner with prefabricated joists fixed in the mould.
  • the joists are prefabricated in a special mould, also with high requirements as regards dimensional accuracy and surface finish, and portions of the reinforcement in each joist are allowed to protrude from one of the edges of the joist, and said portions are thus anchored in the concrete of the base plate when the base plate is cast.
  • a floor structure 1 has at least one supporting floor structure unit 2,3, comprising a base plate 4 with joists 6, said units preferably being made of reinforced concrete.
  • the base plate 4 is dimensioned to applicable fire and sound specifications, and this in general requires a thickness of 80 mm.
  • Each joist is suitably in the form of a T-beam 6, having a web 8 and a flange 10 across one of the edges of the web, forming a 90° angle with the web, and extending approximately equadistant to either side of the web.
  • T-beams are joined, preferably cast together, with the base plate with predetermined spacing, extend from edge to edge of the base plate, and are parallel to each other and with the longitudinal lateral edges of the plate, thus forming open channels 12 between two adjacent beams 6.
  • transverse channels 13 are formed between the outer ends of connecting beams when joined over supports.
  • a preferred spacing between the beams is 0.8 m and a suitable length of a unit is 4-6 m, suitable width is 2.4 m and a preferred distance between the underside of the base plate 4 and the top of the beam flange 10 is 260 mm.
  • Each unit 2,3 is made in accordance with building regulation tolerances as regards height and surface finish, and no further evening or smoothing, e.g. with filler, is required on site.
  • Each T-beam 6 has a reinforcing ladder 14 cast into its web 8, and consisting of diagonally transverse reinforcing rods 16,17, which interconnect parallel longitudinal reinforcing rods 18,19, which are so arranged that a reinforcing rod 18 is located close to the central portion of the junction between the beam web 8 and the beam flange 10, and extends along the length of the beam.
  • ends of two diagonal rods 16,17 are welded, so that the rods in the cross-sectional plane of the beam form a small positive angle of 2-5° with each other. Close to each of the free ends of the diagonal rods there is welded an individual longitudinal reinforcing rod 19, so that both of the rods 19 are parallel to the rod 18.
  • the width of the ladder 14, i.e. the distance between the two rods 19 and the single rod 18, is preferably 190-210 mm and its length depends on the intended length of the T-beam and therefore varies with the length of the floor structure unit which is to be manufactured, within the above stated interval of 4-6 m.
  • a number of pairs of diagonal reinforcing rods 16,17, adapted to the length of the T-beam, are welded in a corresponding manner between the rods 19 and the rod 18, said pairs being parallel to each other in the longitudinal plane of the beam and forming an acute angle of 50-70° with the adjacent pair of diagonal rods.
  • the diagonal rods form a zig-zag ladder pattern.
  • the reinforcing ladder 14 projects with the free ends of the diagonal rods 16,17 and the parallel rods 18, from the concrete in the web of the T-beam, approximately 30-60 mm in order to make possible reliable casting together with the base plate.
  • notches 20 are made with regular spacing, essentially corresponding to the length of the notches, thus producing projections 22.
  • the lateral edges of the beam flange are thus provided with a toothed profile 23, which is intended to increase the force-transmitting capacity of the floor structure units in connection with casting together with supports.
  • the toothed profile 23 is used to achieve a positive grip in the joint.
  • the floor structure 1 is suitably provided with a pair of sound-insulation strips 24 disposed on the outside of each beam flange 10, on which non-attached flooring 26 rests, thus providing good sound-insulation properties.
  • the outside of each flange 10 has "a final finish" and requires no subsequent treatment prior to application of the strips 24.
  • the flooring 26 is usually particle board, but for higher safety requirements and for clinker flooring, cement-bonded tiles are more suitable.
  • the floor structure units 2,3 can be installed in a building frame of a multi-dwelling structure, which, as can be seen in Fig 5, comprises an outer wall 28 and an inner wall 30.
  • the outer wall is composed of prefabricated units, e.g. of the type disclosed in Swedish Patent Application 9203033-7, and both the outer wall 28 and the inner wall 30 each have a supporting surface 32 and 34, respectively, for individual opposite longitudinal side edges 36 and 38, respectively, of the unit 2.
  • anchoring loops 40 are embedded, which can be joined to reinforcing rods 42 extending both from an upper and a lower wall unit and which at the same time can be used as lifting eyes.
  • Each floor structure unit 2,3 can be fixed by means of reinforcing rods 42 in the building frame by concrete 44 being cast up to the underside of the beam flange 10 of each T-beam, in the space between the T-beam and the adjacent supporting surface 32 or 34.
  • concrete 44 being cast up to the underside of the beam flange 10 of each T-beam, in the space between the T-beam and the adjacent supporting surface 32 or 34.
  • the floor structure units 2,3 can be cast together over a support, e.g. a wall, by joining two floor structure units along the edges 46,48 of their short sides, said edges facing each other and resting on supporting ends 50,52 of the wall.
  • the channels 13 made between the edges 46,48 and the supporting surfaces 50,52, can, as can the channels 12, be used for hidden lines.
  • reinforcing rods 54 extend from both an upper 56 and a lower 58 wall unit in the joint portion, for casting together with the floor structure units 2,3.
  • a reinforcement is arranged at the upper edge of the floor structure by extending reinforcing rods 60 over the wall unit 58, parallel to and level with the toothed profile 23 of the facing units 2,3.
  • Said reinforcing rods 60 are intended, after casting, to hold the floor structure units 2,3 together over the wall unit 58.
  • barriers 62 are disposed in facing cavities 20 in the respective toothed profiles 23.
  • the prefabricated floor structure units 2,3 are manufactured by fixing the prefabricated T-beams 6 in a mould, which is prepared with reinforcement for the base plate, at the right height and with the correct spacing, preferably 0.8 m, whereafter casting is done to the correct thickness, which in this case is approximately 80 mm.
  • the T-beams are fixed at such exact tolerances that no additional height adjustment is necessary after assembly in a building frame.
  • Each T-beam has a total length which extends over the entire mould, so that the beam ends are aligned with the supporting edges of the base plate in the finished floor structure unit.
  • the T-beams are manufactured in a smooth mould pallet 64, in which square pipes constitute the mould bodies 66, with barriers 68 against a bottom 70 of the pallet, thus providing the desired T-shape (Fig 8).
  • the pallet bottom 70 is suitably variably deflectable downwards so that an upward curvature can be achieved in the middle portion of the T-beam.
  • each beam 6 consists of the prefabricated reinforcing ladder 14, which is placed in the mould with the reinforcing rod 18 at a suitable height h above the pallet bottom 70, where h assumes values in the interval 18-25 mm and is oriented as was previously described so that the reinforcing rods 19 and 30-60 mm of the ends of the diagonal rods 16,17, after casting, protrude from the concrete for subsequent casting in the bottom plate.
  • Each mould body 66 is fixed with its lifting chain 72 in a lifting yoke 74 which, when the mould bodies 66 are applied with the barriers 68 resting against the bottom 70 of the pallet, is lowered over the mould. Concrete is poured in to a suitable height in the mould.
  • Both ends of the lifting yoke 74 have pressure pistons 76 with piston rods 78 directed against each other, and having individual pressure plates 80.
  • the pressure plates 80 are pressed against the mould bodies 66 adjacent the outer edges of the mould 64.
  • the opposite sides of the mould bodies are pressed in turn against the adjacent T-beam, which is pressed against the adjacent mould body and so on, whereby all of the mould bodies 66 and the T-beams 6 are clamped in the lifting yoke 74 and can be lifted out of the mould at the same time.
  • the beams can then be placed as desired, e.g. on a table, ready for turning and picking up.
  • the pressure pistons 76 are then operated in the opposite directions, thus releasing the pressure plates 80 from the mould bodies 66 which are then lifted up via the lifting chains 72, are oiled and placed again in the mould pallet.
  • the moulded T-beams are thus provided with a "final finish" on the outside of the beam flange 10 and are now ready for turning, fixing and casting into the base plate.
  • the floor structure unit provides both support for above lying wall units and permits subsequent installation of electrics and plumbing and permits continued work several storeys up, which provides for uninterrupted assembly.
  • the undercasting is done and the wall unit is cemented both below and above the floor level, at the same time as there is continuous cementing of the floor structure units on either side of the supporting surface at the top, which reduces deflections and provides a continuous flooring structure.
  • the relatively small amounts of water which are added to the joint casting dry quickly and do not extend the drying time appreciably.
  • the unit permits it to be open under the walls when the T-beams are installed, which in turn permits laying of both ventilation ducts and waste water piping under the wall. It is thus possible to do subsequent installation prior to casting together.
  • the walls are cemented both upwards and downwards at the same time as the floor structure unit is cemented, and this provides continuous floor structures and small deflections.
  • the reinforcing ladder cast into each T-beam does not need to be a double ladder as described above but can be a ladder with single diagonals and a longitudinal rod along each side.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Floor Finish (AREA)
  • Building Environments (AREA)
  • Panels For Use In Building Construction (AREA)
EP94912129A 1993-03-30 1994-03-30 Floor structure including prefabricated floor units Expired - Lifetime EP0692051B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9301051 1993-03-30
SE9301051A SE502060C2 (sv) 1993-03-30 1993-03-30 Bjälklag omfattande prefabricerade bjälklagselement samt ett förfarande för framställning av bjälklaget
PCT/SE1994/000289 WO1994023146A1 (en) 1993-03-30 1994-03-30 Floor structure including prefabricated floor units

Publications (2)

Publication Number Publication Date
EP0692051A1 EP0692051A1 (en) 1996-01-17
EP0692051B1 true EP0692051B1 (en) 2000-10-18

Family

ID=20389408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94912129A Expired - Lifetime EP0692051B1 (en) 1993-03-30 1994-03-30 Floor structure including prefabricated floor units

Country Status (8)

Country Link
EP (1) EP0692051B1 (sv)
AT (1) ATE197077T1 (sv)
AU (1) AU6440494A (sv)
DE (1) DE69426152D1 (sv)
FI (1) FI954634A0 (sv)
NO (1) NO301381B1 (sv)
SE (1) SE502060C2 (sv)
WO (1) WO1994023146A1 (sv)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2151416B1 (es) * 1998-08-27 2001-09-01 Sanchez Jaime Enrique Jimenez Forjado prefabricado para estructuras planas de la edificacion.
ES2281987B1 (es) * 2004-04-19 2008-06-01 Jaime Enrique Jimenez Sanchez Forjado con placa nervada prefabricada con macizado en uno de sus bordes para reparto transversal de cargas y procedimiento de ejecucion del mismo.
FR2962066B1 (fr) * 2010-07-02 2012-08-10 Conseil Service Investissements Procede de fabrication d'un element structurel en beton et element structurel prefabrique en beton.
CN102383512A (zh) * 2011-08-17 2012-03-21 郭正兴 带钢筋桁架翼缘板的预制预应力板及制作方法
CN107190905A (zh) * 2017-07-14 2017-09-22 北京善筑科技股份有限公司 冷弯薄壁型钢一体化梁板及其制作方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE310249B (sv) * 1967-10-05 1969-04-21 J Bohlin
SE364540B (sv) * 1971-01-11 1974-02-25 Tellstedt Ab Rolf
FR2285223A1 (fr) * 1974-09-23 1976-04-16 Ritter Mario Dispositif de perfectionnements apportes aux bancs de prefabrication de poutres, poutrelles et similaires
SE463571B (sv) * 1989-05-10 1990-12-10 Konnberg Sven Olof Saett och gjutform foer tillverkning av byggelement
NO903280L (no) * 1990-07-24 1992-01-27 Arvid Eikaas Anordning ved betongdekke for hus, saerlig bolighus og veggelement til bruk ved samme.

Also Published As

Publication number Publication date
SE9301051D0 (sv) 1993-03-30
FI954634A (sv) 1995-09-29
ATE197077T1 (de) 2000-11-15
WO1994023146A1 (en) 1994-10-13
EP0692051A1 (en) 1996-01-17
NO953849D0 (no) 1995-09-28
SE502060C2 (sv) 1995-07-31
SE9301051L (sv) 1994-10-01
AU6440494A (en) 1994-10-24
FI954634A0 (sv) 1995-09-29
DE69426152D1 (de) 2000-11-23
NO953849L (no) 1995-10-31
NO301381B1 (no) 1997-10-20

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