• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a concrete floor element (1), comprising a concrete body (2) with longitudinally opposite ends (14,15) and longitudinal edges (16,17) extending therebetween, in which concrete body (2) are accommodated or more weight-saving bodies (5) that have a total mass that is lower than the total volume of the weight-saving bodies (5) multiplied by the density of concrete surrounding the weight-saving bodies (5), characterized in that in the concrete body (2) pre-stressing means (6) are embedded which extend between both ends (14, 15) of the concrete body (2).
    公开号:BE1022025B9
    申请号:E20130205
    申请日:2013-03-27
    公开日:2017-01-13
    发明作者:Robert Plug
    申请人:Barhold B V；
    IPC主号:
    专利说明:

    Floor element with prestressing means
    The invention relates to a concrete floor element, comprising a concrete body with longitudinally opposite ends and longitudinal edges extending therebetween, in which concrete body one or more weight-saving bodies have a total mass that is lower than the total volume of the weight-saving body bodies multiplied by the density of concrete that surrounds the weight-saving bodies.
    Such a floor element is for instance known from EP 0.552.201 BI. This publication describes a concrete floor element in which hollow bodies are placed. In the space occupied by the hollow bodies, concrete would be present in the absence of those bodies. Such hollow bodies cause the floor element to have a relatively low weight, so that a building construction constructed therewith can also be lighter.
    Although such a floor element therefore offers great advantages in practice, it appears that with a relatively long span, support of the floor element by several support points is required. The floor element is thereby rigidly mounted on or to the support points. As a result of this rigid fastening, when the floor element is loaded, when it is deformed, cracks can form in the floor element near the support points, whereby the reliability of the building construction decreases. The said deformation concerns in particular the bending or bulging of the floor.
    It is an object of the invention to provide a floor element that deforms less under load at the support points. For this purpose, the floor element according to the invention is characterized in that pre-stressing means are embedded in the concrete body which extend between both ends of the concrete body.
    Because prestressing means are provided in the aforementioned manner, deformation of the floor element is prevented as much as possible. The biasing means exert a compressive force on the concrete body during use. The concrete body is hereby compressed at those places where the concrete body would expand under load. Because this expansion is prevented by the prestressing means, the floor element deforms less, in particular at the support points, whereby the reliability of the building construction is increased.
    An embodiment relates to a floor element in which a lower reinforcement net and an upper reinforcement net are included in the concrete body, the weight-saving bodies being clamped between said reinforcement nets.
    An embodiment relates to a floor element in which the biasing means comprise biasing cables or biasing strands. Such prestressing cables or prestressing strands can withstand a relatively high tensile force and can be positioned and prestressed relatively easily during the manufacture of the floor element.
    The biasing means can extend entirely outside of the weight-saving bodies, so that the weight-saving bodies are not cut.
    The prestressing means are preferably located relatively close to the bottom surface of the concrete body. In particular, the prestressing means can be located between the lower reinforcement mesh and the bottom surface of the concrete body. In this way the biasing means are located at a relatively large distance from the so-called neutral axis, whereby a maximum effect is achieved with regard to the prevention of bending as a result of the loads present on the floor. The prestressing means can also be provided on the lower reinforcement mesh.
    An embodiment relates to a floor element in which the biasing means comprise one or more, preferably three, bias cables or bundles of bias strands arranged at regular intervals. In this way, it appears that a sufficient prestressing force can be achieved in practice. By using several cables or strands, the tensile force is better distributed over the floor element. In addition, with a reduced load capacity of one of the cables or strands, for example due to a production error, the other cables or strands can act as a "backup".
    Furthermore, biasing means can be located relatively close to the upper surface of the concrete body. In particular, biasing means may be located between the upper reinforcement mesh and the upper surface of the concrete body. Also in this way a relatively large distance from the biasing means to the neutral axis can be obtained and a maximum effect can be achieved with regard to the prevention of bending.
    In a particularly practical embodiment, the floor element can be provided with a support strip on a longitudinal edge. Two such adjacent floor elements form a joint at the location of the support strips in which reinforcing bars as well as a concrete filling can be provided to form a rigid mutual connection.
    In addition, the invention relates to a floor provided with several floor elements located next to each other, wherein the floor elements enclose a joint filled with concrete two by two. The above-mentioned joint is filled with concrete in order to obtain a smooth design of the floor and to ensure sufficient power transfer between the neighboring floor elements. These reinforcing bars or connecting bars ensure power transfer between adjacent floor elements, in order to obtain sufficient "disk action".
    The invention also relates to a method for manufacturing a concrete floor element comprising the steps of: - providing dimensioning means, - arranging within the space bounded by the dimensioning means weight-saving bodies that have a total mass that is lower than the total volume of the weight-saving bodies multiplied by the density of the concrete that comes to surround the weight-saving bodies, - applying biasing means, - biasing the biasing means by pulling means acting at opposite ends thereof, - pouring the concrete such that the weight-saving bodies and the pre-stressing means are embedded in the concrete, - the hardening of the concrete, - the elimination of the action of the traction means while maintaining the pre-stress in the pre-stress means as a result of the embedding of the pre-stress means in the hardened concrete.
    The method can also further comprise the following steps: - arranging a reinforcing cage within the dimensioning means comprising a lower reinforcing net and an upper reinforcing net, wherein the weight-saving bodies are clamped between said reinforcing nets, - wherein the step of pouring the concrete subsequently it is carried out that the lower reinforcement mesh, the upper reinforcement mesh, the weight-saving bodies and the prestressing means are embedded in the concrete.
    An additional reinforcement effect can be achieved by installing the reinforcement nets.
    The floor element can be sawn through in a direction transverse to the biasing means to obtain a floor element with a further desired length. Preferably, however, a floor element is immediately produced by the above-mentioned method with the correct length and width.
    Because the prestressing in the prestressing means is maintained as a result of the embedding of the prestressing means in the hardened concrete, the floor element can be sawn to any desired length with suitable sawing means.
    The invention also relates to a method for manufacturing a floor from a plurality of floor elements, comprising the steps of: - placing the floor elements with the longitudinal edges next to and / or against each other, - placing reinforcing bars in the joint formed above the support strips of two adjacent floor elements in the direction transverse to the longitudinal direction of the floor elements, - pouring concrete into the joint and embedding the reinforcing bars in the concrete, - hardening the concrete.
    In this way a floor is realized with a rigid, moment-proof connection between the floor elements.
    It should be noted, incidentally, that the prestressing of concrete floor elements without weight-saving bodies is known in principle. The specific combination of a floor element with weight-saving bodies and prestressing means, however, offers a significantly higher resistance to deformation than just a prestressed floor element without weight-saving bodies or only a non-prestressed floor element with weight-saving bodies. In particular, the reliability of the building construction is considerably higher due to the interaction between the floor element with weight-saving bodies and the prestressing means.
    Figure description
    Embodiments of a concrete floor element according to the invention will be further elucidated with reference to the accompanying figures.
    FIG. 1 shows a diagrammatic cross-sectional view of a floor element according to the invention in a first embodiment;
    FIG. 2 shows a schematic representation in longitudinal section of a floor element according to the invention in the first embodiment;
    FIG. 3 shows a diagrammatic cross-sectional view of a floor element according to the invention in a second embodiment; and
    FIG. 4 shows an exploded perspective view of a floor element according to the invention in a third embodiment.
    FIG. 5 shows a perspective view of a floor formed from a plurality of floor elements according to the invention.
    Figure 1 shows a first embodiment of a concrete floor element 1 according to the invention in cross section. The floor element 1 shown has a bottom portion 8 of relatively small thickness and a relatively thick central portion 9 raised relative to the bottom portion 8. The bottom portion 8 has a lower height than the raised portion 9. The raised portion 9 has a height corresponding to with the final thickness of the floor of which the floor element 1 forms part. The upper surface of the floor element 1 is indicated with reference numeral 19 and the lower surface with reference numeral 18.
    A row of three weight-saving bodies 5 is arranged in the elevated section 9 in the cross-section of Figure 1, wherein "transversely" means: horizontally and in the plane of the drawing. In the longitudinal direction, i.e. perpendicular to the plane of the drawing, several of these transverse rows with weight-saving bodies 5 can be located one behind the other. The person skilled in the art will moreover understand that there may be more or less than three weight-saving bodies in such a transverse row. These weight-saving bodies 5 can be hollow spheres, cones, cubes or similar shapes. However, it is important that these bodies 5 have a total mass that is lower than the total volume of the weight-saving bodies 5 multiplied by the density of the concrete of the concrete body 2 that surrounds the weight-saving bodies 5. In this way the floor element 1 is prevented from becoming unnecessarily heavy. Due to the volume of the weight-saving bodies 5, relatively little concrete is required. In addition, the bending stiffness of the floor element 1 is high due to its relatively large thickness.
    A lower reinforcement net 3 extends horizontally through the bottom portion 8. In the same way, an upper reinforcement net 4 extends horizontally near the upper side of the raised portion 9. The weight-saving bodies 5 are clamped between the reinforcement nets 3 and 4 to form a so-called reinforcement basket. However, the use of the reinforcement nets 3, 4 is not strict. necessary.
    Near the lower reinforcement mesh 3, biasing means 6 are provided in the form of six bundles, each with three biasing cables 6. These extend in the longitudinal direction of the floor element 1. The pre-stressing cables 6 provide pre-stress, in particular the bottom portion 8 of the floor element 1. The pre-stress cables 6 are located between the lower reinforcement mesh 3 and the lower surface 18, although a position above the reinforcement mesh 3 is also conceivable. The location near the bottom surface 18 prevents in particular excessive bending of the floor element 1. The distance between the bundles with prestressing cables 6 preferably corresponds to the distance between the weight-saving bodies 5. The person skilled in the art will understand that the width of the bottom section 8 can vary. , according to the wishes of the user.
    In a similar manner, prestressing means 7, such as the prestressing cables 7 shown, can be provided near the upper reinforcement mesh. These prestressing cables 7 are also located between the upper reinforcement mesh 4 and the upper surface 19 in order to have a maximum effect.
    Supporting strips 10 are provided on the side edges 16, 17. Reinforcing bars 12 are provided in the space above the support strips 10 to make a rigid connection to an adjacent floor element 1. The space has been poured with concrete. These reinforcing bars 12 are preferably mounted along the top of the support strips 10. The side of the raised portion 9 preferably slopes slightly obliquely, in order to facilitate the casting.
    FIG. 2 shows a schematic representation in longitudinal section of a floor element 1 according to the invention in the first embodiment. It can be seen that the prestressing cables 6 are mainly located near the upper surface 19 and the lower surface 18. In the embodiment shown, the prestressing cables 6 are also located outside the above-mentioned basket formed by the lower reinforcement network 3, the upper reinforcement network 4 and the weight-saving bodies 5 placed between them.
    FIG. 3 shows a schematic representation in cross-section of a floor element 1 according to the invention in a second embodiment. The bottom portion 8 of relatively small thickness is narrower in the embodiment shown than in the embodiment of Figure 1, and in such a way that the edges 16, 17 substantially coincide with the side walls of the raised portion 9. In this way a so-called "calyx" 11 is formed between adjacent floor elements 1.
    FIG. 4 shows an exploded perspective view of a floor element according to the invention in a third embodiment, wherein five weight-saving bodies 5 are arranged in a transverse row.
    Said floor elements 1 can be obtained by successively applying the following method steps. Firstly, means for dimensioning and delimiting the outer dimensions of the floor element to be obtained are provided, such as formwork. The lower biasing means 6 are then applied. Subsequently, a reinforcing basket is arranged within the dimensioning means comprising a lower reinforcing net 3 and an upper reinforcing net 4, wherein the weight-saving bodies 5 are clamped between said reinforcing nets 3, 4. The bodies 5 have a total mass that is lower than the total volume of the weight-saving bodies 5 multiplied by the density of the concrete that comes to surround the weight-saving bodies 5. Successively, the biasing means 6 are biased by tensioning means operating at opposite ends thereof. The concrete is then poured in such a way that the lower reinforcement mesh 3, the upper reinforcement mesh 4, the weight-saving bodies 5 and the prestressing means 6 are embedded in the concrete. The concrete must then become hardened, after which the action of the pulling means can be canceled while maintaining the bias in the biasing means 6 as a result of the embedding of the biasing means 6 in the hardened concrete. The use of the reinforcement nets 3 and 4 is not strictly necessary for the application of the invention, but can serve to further strengthen the floor element 1.
    The floor element 1 can be sawn through in a direction transverse to the biasing means 6 in order to obtain a floor element with a desired length. Because the prestressing in the prestressing means is maintained as a result of the embedding of the prestressing means 6 in the hardened concrete, the floor element can be sawn to any desired length with suitable sawing means.
    In addition, a floor can be manufactured from a plurality of floor elements 1 in the following manner. First, the floor elements 1 with the longitudinal edges 16, 17 are placed next to and / or against each other. Then reinforcing bars 12 are placed in the joint 11 formed above the support strips 10 of two adjacent floor elements 1 in the direction transverse to the longitudinal direction of the floor elements, after which concrete is poured into the joint 11 and the reinforcing bars 12 are embedded in the concrete. The concrete must then cure.
    FIG. 5 shows a perspective view of a floor formed from a plurality of floor elements 1 according to the invention. The lower surfaces of the floor elements 1 are supported near ends 14 of the floor elements 1 on a transverse beam 22. This transverse beam 22 is supported on support columns 21.
    List with reference numbers 1. Floor element 2. Concrete 3. Lower reinforcement mesh 4. Upper reinforcement mesh 5. Weight-saving body 6. Pre-tensioning cables near lower reinforcement mesh 7. Pre-tension cables near upper reinforcement mesh 8. Floor element floor element 9. Raised part floor element 10. Support strip 11. Joint 12. Reinforcement bar 13. Longitudinal slot in raised section 14. End of floor element 15. End of floor element 16. Side edge of floor element 17. Side edge of floor element 18. Lower surface of floor element 19. Upper surface of floor element 20. Floor 21. Support column 22. Crossbar
    权利要求:
    Claims (14)
    [1]
    Conclusions
    Concrete floor element (1), comprising a concrete body (2) with longitudinally opposite ends (14, 15) and longitudinal edges (16, 17) extending therebetween, in which concrete body (2) one or more weight-saving bodies are accommodated (5) having a total mass that is lower than the total volume of the weight-saving bodies (5) multiplied by the density of concrete surrounding the weight-saving bodies (5), characterized in that in the concrete body (2) biasing means (6) ) are embedded which extend between both ends (14, 15) of the concrete body (2).
    [2]
    Floor element (1) according to claim 1, wherein a lower reinforcement net (3) and an upper reinforcement net (4) are clamped in the concrete body (2), the weight-saving bodies (5) being included between said reinforcement nets (3, 4) .
    [3]
    Floor element (1) according to claim 1 or 2, wherein the prestressing means (6) comprise prestressing cables or prestressing strands.
    [4]
    4. Floor element (1) according to one of the preceding claims, wherein the prestressing means (6) extend entirely outside the weight-saving bodies (5).
    [5]
    Floor element (1) according to one of the preceding claims, wherein the prestressing means (6) are located between the lower reinforcement mesh (3) and the lower surface (18) of the concrete body (2).
    [6]
    Floor element (1) as claimed in any of the foregoing claims, wherein the prestressing means (6) comprise one or more, preferably three, pre-tensioning cables or bundles of prestressing strings arranged at a regular distance from each other.
    [7]
    Floor element (1) according to one of claims 2 to 6, wherein the prestressing means (7) are located between the upper reinforcement mesh (4) and the upper surface (19) of the concrete body (2).
    [8]
    Floor element (1) according to one of the preceding claims, wherein the floor element (1) is provided with a support strip (10) on a longitudinal edge (16, 17).
    [9]
    Floor provided with a plurality of floor elements (1) located next to each other according to one of the preceding claims, wherein the floor elements (1) enclose a joint (11) filled with concrete each time.
    [10]
    Floor according to claim 9, wherein reinforcement bars (12) are included in the joint (11) which extend from one floor element (1) to the other floor element (1).
    [11]
    A method for manufacturing a concrete floor element (1), comprising the steps of: - providing dimensioning means, - arranging within the space bounded by the dimensioning means weight-saving bodies (5) that have a total mass that is lower than the total volume of the weight-saving bodies (5) multiplied by the density of the concrete (2) that comes to surround the weight-saving bodies (5), - applying biasing means (6), - biasing the biasing means (6) ) by pulling means acting at opposite ends thereof, - pouring the concrete (2) such that the weight-saving bodies (5) and the prestressing means (6) are embedded in the concrete (2), - hardening the concrete, - canceling the operation of the pulling means while maintaining the bias in the biasing means (6) as a result of the embedding of the biasing means (6) in the hardened concrete.
    [12]
    A method according to claim 11, further comprising the steps of: - providing a reinforcement cage within the dimensioning means comprising a lower reinforcement net (3) and an upper reinforcement net (4), wherein the weight-saving bodies (5) between said reinforcement nets (3, 4) are clamped, wherein the step of pouring the concrete (2) is then carried out in such a way that the lower reinforcement net (3), the upper reinforcement net (4), the weight-saving bodies (5) and the prestressing means (6) the concrete (2) is embedded.
    [13]
    A method according to claim 11 or 12, wherein the floor element (1) is sawn through in a direction transverse to the biasing means (6) to obtain a floor element (1) with a further desired length.
    [14]
    Method for manufacturing a floor from a plurality of floor elements (1) according to claim 8, comprising the steps of: - placing the floor elements (1) next to and / or against each other with the longitudinal edges (16, 17), placing reinforcing bars (12) in the joint (11) formed above the support strips (10) of two adjacent floor elements (1) in the direction transverse to the longitudinal direction of the floor elements (1), - pouring concrete into the joint (11) ) and embedding the reinforcing bars (12) in the concrete, - hardening the concrete.
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    同族专利:
    公开号 | 公开日
    BE1022025B1|2016-02-04|
    NL2008542C2|2013-09-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    AT296854B|1967-10-16|1972-02-25|Eberhardt & Weidinger|Slip maker for the production of concrete slabs, in particular prestressed concrete slabs|
    FR2631056B1|1988-05-09|1992-05-07|Rech Etudes Tech|PRE-STRESSED CONCRETE CONCRETE CONSTRUCTION ELEMENT AND INSTALLATION FOR ITS MANUFACTURE|
    DE19903304A1|1999-01-28|2000-08-03|Hauser Manfred|Micro-fabric mat, for production of slurry infiltrated mat concrete components, comprises micro-fabric layers spaced apart by displacement bodies precisely positioned by fabric mesh width selection|
    ES2161199B1|2000-05-16|2002-07-01|Sanchez Jaime Enrique Jimenez|MANUFACTURING PROCEDURE OF LIGHTWEIGHT ALVEOLAR PLATE MATERIALIZED IN WORK, PLATE AS WELL OBTAINED AND ITS APPLICATION IN HOUSING.|
    US6955014B2|2002-11-07|2005-10-18|Fabcon, Inc.|Insulated concrete cast panels with voids in billits|
    AR073837A1|2009-10-29|2010-12-09|Levinton Ricardo Horacio|CONSTRUCTION METHOD FOR MAKING LIGHT STRUCTURES, HOW TO BE Slabs, PRELOSES, PLATES, TABIQUES AND BEAMS, WITH RELIEFING DISCS AND BADS DESIGNED SPECIFICALLY FOR THIS METHOD|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL2008542A|NL2008542C2|2012-03-27|2012-03-27|FLOOR ELEMENT EQUIPPED WITH PRECAUTIONS.|
    NL2008542|2012-03-27|
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