EP1180563A1 - Methode zur fabrikation von balken mit polystyren-bögen und rippen aus vorgespanntem beton sowie auf diese weise hergestellte balken - Google Patents

Methode zur fabrikation von balken mit polystyren-bögen und rippen aus vorgespanntem beton sowie auf diese weise hergestellte balken Download PDF

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Publication number
EP1180563A1
EP1180563A1 EP00927250A EP00927250A EP1180563A1 EP 1180563 A1 EP1180563 A1 EP 1180563A1 EP 00927250 A EP00927250 A EP 00927250A EP 00927250 A EP00927250 A EP 00927250A EP 1180563 A1 EP1180563 A1 EP 1180563A1
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EP
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Prior art keywords
concrete
slabs
polystyrene
buttress
buttresses
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Application number
EP00927250A
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English (en)
French (fr)
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EP1180563B1 (de
Inventor
Jaime Enrique Jimenez Sanchez
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    • 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
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • 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
    • 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

Definitions

  • the present invention relates to a buttressed top slab for building structures, which by employing polystyrene or another material as light flooring blocks, embed said structure in the concrete buttresses of the slab, thereby configuring a prefabricated slab in a single body.
  • the object of this invention is to define the manufacturing process having a sliding extruder or moulder with prestressed joists or alveolar slabs, so that when pouring the concrete into the space left in the vault top slabs, which is normally double-T shaped but may adopt a single -T configuration as well, a vibration ensures that the concrete adheres the top slabs to the concrete buttresses, thus producing a slab with sufficient resistance enabling to manipulate it and walk on it with complete safety.
  • the system means to replace conventional joists and top slabs with this prefabricated slab in flat structures characteristic of household constructions currently used in Spain and in warm weather countries.
  • Classic joist and vault structures are currently the most inexpensive structures in tropical or Mediterranean climates.
  • top slab structures are those used most widely, due to their efficient use of materials and labour in construction fabrication and assembly.
  • construction work must be shortened as much as possible to prevent undue labour expenses and reduce the risk of freezing in construction work pouring of concrete.
  • prefabricated top slabs are used of the half-slab type, both prestressed and reinforced, or prestressed alveolar slabs, with an absence of classic joist and vault structures.
  • a further reason for employing prefabricated joist structures is worker safety, as most labour accidents in construction work occur in the structure construction stage, and specifically entail falling of workers due to the vault breaking; this results in wealthier countries dictating standards in which safer systems are demanded, or the floor must be planked entirely in order to prevent the vaults from breaking.
  • the main difference with said invention is the continuous fabrication method, which allows it to be made with less labour and more quickly, in a track 100 to 200 metres long and cut to the desired length with diamond disc.
  • connection of the buttress to the support girders is solved by construction placing of a steel connector in the alveolus which bears the slab buttress. Said alveolus is continuous along the entire buttresses. The finished product is further improved as regards end burrs and concrete slurry on the slab, etc.
  • the invention object of the present memory relates to a type of pre-stressed prefabricated slab with the ensuing time reduction in the construction work as the forging need not be assembled on site, and the absence of a lower planking, as well as providing a solution for support of the prefabricated joists which allows leaving the bottom part of the structure fully flat and ready to receive the inexpensive plaster directly.
  • the slab may be used with classic unidirectional flat joist floor structures (used to support joists and girders of the forging) as well as for the support of load walls made of brick, and its main advantage is manifested when combining TUL joists consisting of a ferrule cage with a concrete screed. These joists allow to support the structure of said flooring, thus avoiding the expensive construction.
  • the slab comprises a prefabrication of width between 0.6 and 2.4 m approximately, with a typical width of 1.2 m as a result of transportation widths and the weight which cranes can lift.
  • the length of the slab can vary depending on the clearance between joists and on the loads, but a typical value is a 19 cm buttresses plus 3 cm polystyrene coating the buttresses on the bottom, which when added to a further 4 cm concrete applied in construction give the 26 cm of traditional top slabs calculated for clearances of 3 to 6 m and typical household loads of 660 kg/m2 of total load.
  • Each prefabricated slab incorporates two solid concrete or alveolar buttresses of the same width as the slab which stiffen it and prevent planking or support in the construction, so that they are self supporting, as with alveolar slabs.
  • These buttresses may have several shapes, with the most common one being those which have a double -T shape in each buttress, although it may also have a single - T.
  • the double T wings may be rectangular, trapezoidal, triangular, round, etc.
  • the motive for the top T is that in order to be self supporting a compression head is required for the top concrete wider than the single buttresses; in turn, this greater width by means of the greater contact surface with the poured concrete allows to ensure the transmission of loads through the slope between the two concretes; it also allows the linkage of the lightening material between ribbings, which mainly consists of expanded polystyrene slabs, although ceramic or concrete slabs may also be used. Lastly, because of its greater width it provides greater safety to workers as when walking they will be stepping on concrete areas, not only on the slabs.
  • the reason for the bottom T is that in the areas where the joist is working in negative torque there is a wider compressed concrete head, thus saving negative steel as compared to traditional narrow bottom buttress floor structures.
  • the bottom wings of the buttresses are further useful in locking the polystyrene or ceramic slabs, preventing them from falling or slipping while the worker walks on them. As the concrete is extruded in factory against them, the adherence between these parts and the buttress concrete is ensured, unlike in traditional joist and slab structures in which the slabs are loose and easily slip from the joists, until the construction concrete is poured.
  • the steel employed to support the positive torques of the joist is incorporated in the bottom part of the buttresses at the time of fabrication. Steel to withstand negative torque is placed on the slab, and confined in place by the compression layer concrete poured in construction. If a compression layer is not incorporated in the construction negative steel may be housed in the open alveolus of the ends.
  • Construction of the slab with vaults in-factory entails a further advantage, in that a mould is no longer required to shape the buttresses as the double T shape is achieved with the shape drawn on the polystyrene vaults themselves (or ceramic or concrete), without later removing the framework of the mould required.
  • the new slabs are the possibility of reinforcing support areas with cutting steel if calculations so recommend, or further increasing compression heads, both lower and upper, also when required by the calculations.
  • the increased width and reinforcement due to having loads concentrated afterwards on the building is also not a problem as narrower slabs are used to increase the buttresses.
  • the different width of the floor joist is immediately achieved by using thicker or narrower slabs thus adapting to greater or smaller clearances.
  • the weight of the finished floor joist it is lower than the joist and slab floor joist if polystyrene slabs are used, which saves a few kilograms of steel in the calculation.
  • a ceramic slab and joist structure of edge 26 cm weighs 260 kg/m2, while the new structure weighs around 200 kg/m2.
  • Weight of prefabricated slabs is on the order of 600 kg (for thickness 25 cm, width 1.2 m and length 5 m, typical for homes), which allows current 750 kg cranes to lift these slabs easily. Transport is also much less than for alveolar slabs of the same use, as well as joist and slabs.
  • Fabrication of angled support slabs can be immediately performed by cutting the required angle on the pre-stress track with a diamond disc.
  • Plates may be provided with 1, 2, 3 or 4 buttresses, as desired by the designer or the constructor.
  • Buttresses may have several shapes, including rectangular, and thus in order to ensure embedding of the slabs with this type of rectangular buttresses, their walls shall be provided with saw teeth so that the concrete adheres more firmly.
  • the dovetail slots made on the polystyrene slabs every 5 or 10 cm serve to lock the whitewash plaster.
  • the ends of the support buttresses may have a protruding reinforcement in order to lock the cutting load on the support, according to standards.
  • This connection reinforcement shall be housed in the alveolus which houses the slab buttresses, and the concrete poured in the alveolus ensures the overlapping of this reinforcement with the bottom longitudinal reinforcement of the slab.
  • Reinforcement of negative torques may be distributed along steel bars of lesser diameter and shared along the entire upper surface of the slabs, not necessarily on top of the buttresses.
  • the main advantage obtained by this novel system shall therefore be economical, as if we evaluate all costs intervening in its fabrication and assembly we obtain the same cost as for a traditional joist and slab structure, which hitherto is considered the cheapest in the market.
  • polystyrene slabs more expensive than those of ceramic or concrete, this is offset by the slab not incorporating any more concrete than a traditional structure, not requiring celosia, reducing the negative torque reinforcement substantially as its compression head is smaller, for a typical thickness of 26 cm it is 60 or 70 kg/cm2 lighter than a traditional reinforced joist structure (if compared to a prestressed joist the weight reduction is greater) thereby saving kilograms of steel in the entire structure, as planking is not required it saves labour, as no special moulds are required investment in manufacturing installations is small, if a prestressed or alveolar joist installation is already available, etc.
  • the general fabrication process for the prestressed slab consists of placing the 1.2 m wide slabs on the track, with the buttresses already formed on the polystyrene.
  • the moulding machine is provided with two lateral and/or upper traction rollers, which guide the slabs, align them and compress them somewhat against the already moulded slab, achieving greater tightness as well as preventing unwanted floatability of the slabs.
  • These lateral rollers also serve to prevent the slab from opening due to the concrete pressure and vibrating when passing through the buttresses filler bins.
  • Rollers may be grooved for a greater grip on the polystyrene. Rollers may also be replaced by endless belts, endless chains or clappers. In addition these guide systems may be powered or not.
  • a forward filament guide comb will prevent the concrete from overtaking the machine, for which the retainer comb or guillotine shall have the same shape as the buttress (drawn on the polystyrene) and shall slide along the inside of the slabs.
  • a sliding forward mould can be used, also known as a trumpet, with an approximately rectangular shape and with a clearance with the polystyrene walls of 20 to 30 mm.
  • This forward mould shall be long (between 40 and 100 cm) in order to prevent the concrete from leaving between the former and the slab wall towards the front of the machine. Friction with walls and its permanent forward position with respect to the polystyrene ensure reingestion of any concrete which advances.
  • a good tightness during filling may be ensured by skids in contact with the polystyrene which slide on it, preventing the lateral exit of the concrete.
  • the slope load between the concrete of the buttress and the compression layer can be ensured by a top striation of the concrete at the end of the machine, leaving an impression, longitudinal canals extruded by the machine itself or by an open alveolus on the top.
  • the alveolus may have zero width (solid buttress), when designing a metal alveolus of the mould with near-zero thickness, but thick enough to ensure an inner vibrating of the buttress.
  • a 6 cm polystyrene layer When resting on prefabricated Tul or concrete screed (approximately 6 cm) with ferrule cage girders, a 6 cm polystyrene layer shall be placed under the buttress, so that in order to rest it is sufficient to cut the polystyrene, whether in shop or better on the construction site, so that the polystyrene edge always touches the edge of the girder screed, preventing gaps when applying the plaster.
  • They may also be elevated by laterally pressing on the polystyrene, employing a hook on the ends of the buttresses and housed in the alveolus, leaving steel hooks embedded in the buttresses, etc.
  • a solidification may also be performed, by cutting the bottom polystyrene coating of the buttresses before moulding the concrete, marking and measuring the length at which the slab will later be cut. In this way when the moulder is passed pouring concrete, the concrete will descend to the bottom of the track and there will be concrete in sight to rest the framework or load wall of the construction, in this way not spoiling the polystyrene bottom coating of the buttresses.
  • a preferred embodiment is described with reference to the figures of a slab (1) comprising two concrete buttresses (2) and a polystyrene or other material vault (3). Inside said buttresses is housed reinforcement (4), required to withstand the positive torques of the floor joist.
  • the slabs In order to make floor joist (5) on site the slabs shall be placed parallel to each other, resting on the load girders of the structure, and the floor joist shall be completed by placing reinforcement (6) meant to withstand negative torques and by on-site addition of a steel mesh (7) and a thin concrete compression layer (8).
  • Slab buttresses (2) may have a double T shape with bottom wings (9) required to support vaults (3) and to act as compressed heads when the floor joist is under negative torques.
  • wings (10) will also allow to support vaults (3), also forming a compression head to withstand positive torques of the slab when placed on work, so that they are self bearing, and ensures transmission of loads between buttress (2) and compression layer (8) of the work through rough surface (11) relating the two concretes.
  • Said rough surface (11) is made by scraping the surface or by any other existing means, such as gravure.
  • Scraping (11) may be replaced by a deep open alveolus (12) or by top longitudinal grooves (13), or by half a top-open shallow alveolus (14).
  • a further alternative is to make grooves (15) on the sides of vaults (3) inside the buttresses, in order to ensure a good attachment between the concrete and the vault.
  • Double T wings (10) may have various shapes, ranging from triangular to trapezoidal, rectangular or round.
  • vaults (16) measuring between 1 and 6 m shall be placed on the pre-stress track. Said vaults will bear a cut-out of the shape (17) of the concrete buttresses.
  • lateral rollers (18) which may be tractioning or not shall be used, pressing on the vault and forcing it to align and compress against the concreted vaults.
  • a roller is referred to, an endless belt, a chain or a clapper may also be employed. The same can be achieved using top rollers (19) and lateral skids (20).
  • the concrete is filled by pouring the contents of the moulding machine bin on the buttress space drawn in the vault, using lateral skids (21) which prevent the concrete from exiting between the filling bin (22) and the vault through the contact groove (23).
  • the concrete is retained on the front of the machine by a retaining guillotine (24) of the type used in these machines, with the shape of the buttress.
  • a better grip between the compression layer and the slab concrete buttress may be obtained using a top striation (27) of the buttress.
  • a connector (29) can be housed in alveolus (28) which by means of the concrete provided in the construction site causes the overlap between the connector and slab steel.
  • Figure 11 shows a full fabrication line comprising a roller (18) guide and alignment area, a retaining gate (24), a filling area with bin and inner alveolus (22), in addition to lateral rollers to offer the concreting pressure (30), a fitting mould with alveolus (25) and lastly a striation area (27).
  • a roller (18) guide and alignment area comprising a roller (18) guide and alignment area, a retaining gate (24), a filling area with bin and inner alveolus (22), in addition to lateral rollers to offer the concreting pressure (30), a fitting mould with alveolus (25) and lastly a striation area (27).
  • Figure 12 shows separately the retention guillotine (24) which may be replaced by a forward trumpet, pre-mould or friction plug (31), comprising a wide skid (32) which bears on the vault, and a buttress (33) with a rectangular section, separated from the polystyrene walls by 20 to 30 mm.
  • a forward trumpet, pre-mould or friction plug 31
  • a wide skid 32 which bears on the vault
  • a buttress (33) with a rectangular section, separated from the polystyrene walls by 20 to 30 mm.
  • the front view of said set aids in differentiating the two types of forward retainers, the guillotine (24) and friction plug (31). Also remarked is the lateral sealing by skid (23) on the vault.
  • girder screed (35) In order to rest the concrete screed Tul type girder (35) with a ferrule cage (36), it will suffice to have a bottom coating of polystyrene (37) of the same thickness as screed (35), then cutting out excess polystyrene and resting concrete buttress (2) directly on the girder screed. In order to not reduce the calculation width of the girder due to interference with the polystyrene vaults and absorb possible errors, girder screed (35) shall be made 5 or 10 cm wider on each side than obtained from a calculation. By cutting off excess polystyrene on site, groove (38) left between the bottom area of slab (2) and the edge of screed (35) is reduced practically to nothing. Thus the plaster wash will not have to cover too large grooves.
  • each buttress (41) may pinch the edges of each buttress (41) with a gravity or hydraulic clamp (42) incrusted in vault (43), searching for the lower area of the top wing of the double T of the concrete buttress.
  • a gravity or hydraulic clamp (42) incrusted in vault (43)

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Floor Finish (AREA)
  • Panels For Use In Building Construction (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Ropes Or Cables (AREA)
  • Reinforcement Elements For Buildings (AREA)
EP00927250A 1999-05-17 2000-05-11 Methode zur fabrikation von balken mit polystyren-bögen und rippen aus vorgespanntem beton sowie maschine zur herstellung solcher balken Expired - Lifetime EP1180563B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES9901042 1999-05-17
ES009901042A ES2161139B1 (es) 1999-05-17 1999-05-17 Proceso de fabricacion de placas de forjado de bovedilla de poliestireno y nervio de hormigon pretensado y placas de forjado asi obtenidas.
PCT/ES2000/000176 WO2000070162A1 (es) 1999-05-17 2000-05-11 Proceso de fabricacion de placas de forjado de bovedilla de poliestireno y nervio de hormigon pretensado y placas de forjado asi obtenidas

Publications (2)

Publication Number Publication Date
EP1180563A1 true EP1180563A1 (de) 2002-02-20
EP1180563B1 EP1180563B1 (de) 2004-09-22

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Application Number Title Priority Date Filing Date
EP00927250A Expired - Lifetime EP1180563B1 (de) 1999-05-17 2000-05-11 Methode zur fabrikation von balken mit polystyren-bögen und rippen aus vorgespanntem beton sowie maschine zur herstellung solcher balken

Country Status (7)

Country Link
EP (1) EP1180563B1 (de)
AT (1) ATE277241T1 (de)
AU (1) AU4568800A (de)
DE (1) DE60014069D1 (de)
ES (1) ES2161139B1 (de)
PT (1) PT1180563E (de)
WO (1) WO2000070162A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2173028A1 (es) * 2000-07-06 2002-10-01 Sanchez Jaime Enrique Jimenez Proceso de fabricacion en continuo de tablero aislante para cubiertas en hormigon pretensado y tablero asi obtenido.
NL1026233C2 (nl) * 2004-05-19 2005-11-22 Jansen B V A Werkwijze voor het vervaardigen van geïsoleerde betonnen vlakke bouwelementen.
CN100427711C (zh) * 2004-11-22 2008-10-22 邱则有 一种砼空心板用空腔构件
CN100427712C (zh) * 2004-11-23 2008-10-22 邱则有 一种砼空心板用空腔构件
CN100449093C (zh) * 2004-11-23 2009-01-07 邱则有 一种砼空心板用空腔构件
EP2146017A1 (de) 2008-07-18 2010-01-20 Beletto AG Bauteil für Decken oder Dächer sowie Verfahren zum Herstellen eines Bauteils
ITMI20091542A1 (it) * 2009-09-07 2011-03-08 Demuro S R L Struttura di solaio con elementi prefabbricati e metodo per la sua realizzazione.
ITAR20130031A1 (it) * 2013-08-13 2015-02-14 Ettore Izzo Elemento strutturale prefabbricato, particolarmente per la realizzazione di solai per costruzioni civili e industriali.
CN107327064A (zh) * 2016-04-29 2017-11-07 上海宝冶集团有限公司 无梁楼盖中薄壁方箱抗浮方法

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ES2217894B1 (es) * 2001-04-03 2006-01-16 Jaime Enrique Jimenez Sanchez Forjado de vigueta autoportante y bovedilla para la edificacion asi como procedimiento de construccion del mismo.
ES2219121B1 (es) * 2001-07-03 2006-01-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion y construccion de muros de carga para viviendas con placa alveolar aligerada.
ES2229827B2 (es) * 2001-07-20 2006-11-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion de placa pretensada aligerada con poliestireno colocado en fabrica y placa asi obtenida.
ES2258877B1 (es) * 2003-08-29 2007-10-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion de losas autoportantes ceramicas sobre pista larga de pretensado, las losas asi obtenidas y la maquina necesaria para su fabricacion.
CN100545386C (zh) * 2003-09-15 2009-09-30 邱则有 一种现浇砼用轻质胎模构件
ES2263320B1 (es) * 2004-02-04 2007-10-16 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion sobre pista larga de pretensado de placas nervadas aislantes para aplicacion en cubiertas inclinadas y placas asi obtenidas.
ES2301266B1 (es) * 2004-05-17 2009-05-01 Jaime Enrique Jimenez Sanchez Procedimiento de fabricacion de placa nervada sobre pista larga de pretensado con tapadera en sus extremos y placa asi obtenida para forjados con falso techo.
CN101408049B (zh) * 2004-11-22 2011-04-27 湖南邱则有专利战略策划有限公司 一种砼空心板用空腔构件
ES2349513B1 (es) * 2008-06-13 2011-10-31 Zenet Prefabricados, S.L. Proceso de fabricacion de placa prefabricada autoportante para forjados y placa obtenida.

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FR2614336B1 (fr) * 1987-04-23 1991-09-27 Rech Etudes Tech Element de construction prefabrique a isolation thermique integree, notamment element de plancher, et procede pour sa fabrication
SE9103042D0 (sv) * 1991-10-18 1991-10-18 Ew Element Foersaeljnings Ab Saett att tillverka vaeggelement, samt vaeggelement tillverkat enligt saettet

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See references of WO0070162A1 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2173028A1 (es) * 2000-07-06 2002-10-01 Sanchez Jaime Enrique Jimenez Proceso de fabricacion en continuo de tablero aislante para cubiertas en hormigon pretensado y tablero asi obtenido.
NL1026233C2 (nl) * 2004-05-19 2005-11-22 Jansen B V A Werkwijze voor het vervaardigen van geïsoleerde betonnen vlakke bouwelementen.
CN100427711C (zh) * 2004-11-22 2008-10-22 邱则有 一种砼空心板用空腔构件
CN100427712C (zh) * 2004-11-23 2008-10-22 邱则有 一种砼空心板用空腔构件
CN100449093C (zh) * 2004-11-23 2009-01-07 邱则有 一种砼空心板用空腔构件
EP2146017A1 (de) 2008-07-18 2010-01-20 Beletto AG Bauteil für Decken oder Dächer sowie Verfahren zum Herstellen eines Bauteils
ITMI20091542A1 (it) * 2009-09-07 2011-03-08 Demuro S R L Struttura di solaio con elementi prefabbricati e metodo per la sua realizzazione.
ITAR20130031A1 (it) * 2013-08-13 2015-02-14 Ettore Izzo Elemento strutturale prefabbricato, particolarmente per la realizzazione di solai per costruzioni civili e industriali.
CN107327064A (zh) * 2016-04-29 2017-11-07 上海宝冶集团有限公司 无梁楼盖中薄壁方箱抗浮方法

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ATE277241T1 (de) 2004-10-15
ES2161139A1 (es) 2001-11-16
ES2161139B1 (es) 2002-06-16
DE60014069D1 (de) 2004-10-28
PT1180563E (pt) 2005-02-28
AU4568800A (en) 2000-12-05
EP1180563B1 (de) 2004-09-22

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