• 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:
    A method of molding a part (100) made of a material comprising cement comprising the following steps: - placing a first element (20, 60) facing a second element (1) so that the outer wall (21.1, 60.1) of one of the elements (20, 60) delimits with the inner wall (6.1) of the other element (1) a receiving space (50), the shape of one of the elements (20); , 60) being editable on command; - Introducing ultra high performance fiber concrete (51) to fill the receiving volume; - control a progressive modification of one of the elements (20) as and when taking ultra-high performance fiber concrete; - Release of the tubular element (20).
    公开号:FR3033514A1
    申请号:FR1552061
    申请日:2015-03-12
    公开日:2016-09-16
    发明作者:Yves Brugeaud
    申请人:CONSEIL SERVICE INVESTISSEMENTS；
    IPC主号:
    专利说明:

    [0001] FIELD OF THE INVENTION The present invention relates to the field of the manufacture of elements made of material comprising cement and more particularly to the molding of tubular elements made of Ultra-High Performance Fibrated Concrete (UHPC). BACKGROUND OF THE INVENTION It is known to produce tubular concrete elements such as conduits or nozzles by molding. Conventionally, a cylindrical mold with a vertical axis is placed around a tubular reinforcement cage and a twist is introduced into the interior space delimited by the reinforcement cage. The auger has an outer diameter substantially corresponding to the desired inner diameter for the tubular member and is located at the lower end of the mold. Concrete is then poured gravitarily into the mold while the auger is rotated and raised along the axis of the mold. The combined rotational and translational movements of the auger project the concrete through the reinforcement cage against the inner wall of the mold and shape the inner wall of the tubular member. Generally, the spin performs a single round trip along the vertical axis before being removed from the mold. Once the concrete setting is sufficient, the tubular element is demolded and is subjected to a drying phase. Such a method performs a centrifugation of the constituents of the concrete, which, more particularly in the case of UHPC, causes a segregation of the constituents and therefore a heterogeneous distribution of the components in the concrete. It follows that the element thus produced has mechanical properties much lower than it should have in theory. Alternatively, and for elements of large diameters, a rigid inner core is placed in the mold and defines the inner wall of a tubular casting space. Concrete is introduced gravitarily and vibrated into the tubular space of casting. Once sufficient concrete has been set, the outer mold is deposited, and the inner core is removed from the tubular member. Such a method of manufacture requires providing a contact surface of the core with the inner wall of the rigorously smooth tubular element and / or a suitable draft angle. Such an embodiment is unsuitable for achievements in UHPC because this material has significant withdrawals. Indeed, a withdrawal of the UHPC around a rigid core will inevitably cause cracking of the tubular member and deterioration of the member upon removal of the core. Thus, it is not possible to achieve by existing processes the molding of tubular elements in UHPC and in particular elements of great length and reduced outside diameter.
    [0002] When constructing foundations for civil engineering works, such as crossing bridges, it is known to beating piles or micropiles in order to be able to rely on a ground by rush effect or friction. The use of piles generally requires threshing and / or drilling means. The piles set up can be prefabricated or cast on site. Piling prefabricated piles requires the handling of massive piles, so the use of lifting gear in addition to the threshing machines. There are also injected drilled piles that inject a cementitious material into the soil. A cylindrical cavity is first drilled in the soil and then a tubular sheath is made against the wall of the cavity with a sheath slurry. A sleeve tube is placed in the sheath 3033514 3 and the injection material is injected at different points of the sleeve tube. Under the pressure of the injection material, the sheath fractures (it is said to "slap") and allows the injection material to diffuse into the surrounding soil, thereby stabilizing it. This technique is particularly advantageous, but requires having a drill and qualified personnel for its use. All of these constraints prevent the development of crossings in isolated areas, particularly in developing countries for which the civil engineering machinery fleet is small, whereas it is in these countries that need for traffic and crossing infrastructure is the most important. OBJECT OF THE INVENTION The object of the invention is to produce tubular elements in UHPC by molding, particularly in long lengths.
    [0003] SUMMARY OF THE INVENTION To this end, according to the invention, there is provided a method of molding a part made of a material comprising cement, comprising the following steps: placing a first element facing the surface; a second element so that an outer wall of one of the elements delimits with an inner wall of the other element a receiving volume, the shape of one of the elements being modifiable progressively on command; Introducing the material comprising cement so as to fill the receiving volume; control of a progressive modification of the shape of one of the elements as and when the material containing cement is taken; Demoulding of the part.
    [0004] Advantageously, the molding method applies to the molding of a tubular part made of material comprising cement, and comprises the following steps: placing a core in a cylindrical mold so that the wall external core defines with the inner wall of the mold a tubular receiving volume, the shape of the core being modifiable progressively on command; Introducing the material comprising cement so as to fill the tubular receiving volume; control of a progressive change in the shape of the core as the cement-containing material is taken until a core shape is obtained enabling it to be extracted from the tubular element after at least partial seizing of the material containing cement; - removal of the nucleus; Demolding of the tubular piece. It is then possible to easily mold tubular pieces of great length without having to provide clearance angles which would lead, for small diameters and / or elements having a closed end, to a strongly flared shape. The deformation of the core accompanies the removal of the material containing cement and reduces the risk of cracking the material. The core then absorbs the shrinkage of the material during curing in the mold. Removal of the core is easy and without risk to the integrity of the molded tubular member. Advantageously, the material comprising cement is ultra high performance fiber reinforced concrete (UHPC). Alternatively, the material comprising cement is mortar. According to a particular embodiment, the core is manufactured at least partially in wax. The wax is a material that can be reused for a new molding operation, non-toxic and whose control of the deformation is easy. In addition, wax is an advantageous material for absorbing withdrawal of UHPC. Indeed, during its hardening, the BFUP releases a heat that will help soften the wax from the moment the UHPC begins to withdraw. Advantageously, the outer surface of the core is shaped to impart a rough surface condition and / or cavities on the inner surface of the tubular pile. This improves the adhesion of a possible second-phase concrete that would be cast inside the tubular element.
    [0005] The invention also relates to an ultra high performance fiber-reinforced tubular pile molded according to this method. The invention also relates to a kernel with customarily modifiable shape for the implementation of the method. BRIEF DESCRIPTION OF THE DRAWINGS Reference is made to the accompanying drawings in which: FIG. 1 is a diagrammatic perspective view of a longitudinal section of a pile according to a first embodiment of the invention; - Figure 2 is a schematic perspective view of a longitudinal section of a pile 30 according to a second embodiment of the invention; FIG. 3 is an exploded perspective view of a mold according to the invention; Figure 4 is a side view of a core according to a first embodiment of the invention; Figure 5 is a sectional view along the section plane V-V of the core of Figure 4; Figures 6a to 6f are diagrammatic views in longitudinal section of the different steps of a first embodiment of the method according to the invention; Figure 7 is a schematic perspective view of a core according to a second embodiment of the invention; Figures 8a to 8f are schematic views in longitudinal section of the different steps of a second embodiment of the method 15 according to the invention; Figure 9 is a sectional view along the section plane IX-IX of Figure 8b; Figure 10 is a schematic perspective view of a flange according to a third embodiment of the invention; Figures 11.a to 11.f are schematic views in longitudinal section of the various steps of a third embodiment of the method according to the invention; Figure 12 is a schematic longitudinal sectional view of an additional step of the third embodiment of the method according to the invention; Fig. 13 is a schematic perspective view of a core and its associated mold according to a fourth embodiment of the invention; FIGS. 14a to 14f are diagrammatic views in longitudinal section of the different steps of a fourth embodiment of the method according to the invention; Figure 15 is a schematic longitudinal sectional view of a prior step of the fourth embodiment of the method according to the invention; Figure 16 is a schematic perspective view of a fifth mode of a device according to the invention; Fig. 17 is a perspective view of Fig. 16; Figures 18a to 18e are detail embodiment in schematic longitudinal sectional views of the various steps of the embodiment of the method according to the invention corresponding to the device of Figure 16; Figure 19 is a schematic view of an embodiment of a pile according to the invention; Figure 20 is a schematic view of a pile assembled according to the sixth embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, the tubular element to be manufactured is a pile of UHPCF, generally designated at 100, extending along a longitudinal axis (X). The pile 100 includes an outer wall 101 and an inner wall 102. The upper end 103 of the pile 100 is open and the lower end 104 has a tip 105. The inner wall 102 defines an interior volume 106 of substantially cylindrical shape and 30 has a first upper portion 107 provided with circular grooves 108. The pile 100 here has an outer diameter of 200 millimeters. According to a second embodiment shown in FIG. 2, the pile 100 may comprise annular-shaped walls 110 extending radially in the volume 306 to divide it into several compartments 111. A first embodiment of a method The first embodiment of the method according to the invention uses a mold 1 and a core 20. With reference to FIG. 3, the mold 1 is a cylindrical mold extending along a longitudinal axis (X) and separated into two half-molds 2 and 3 in a plane containing the longitudinal axis (X). The half-molds 2 and 3 10 are provided with the means of being secured to one another, here in the form of notched tabs 4 integral with the half-mold 2 and intended to cooperate with jamming cleats 5 integral with the half-mold mold 3. The inner wall 6.1 of the mold 1 formed by the assembly 15 of the two half-molds 2 and 3 defines a volume 6 comprising a cylindrical portion 7 open at the upper end 8 of the mold 1 and a conical portion 9 whose tip 10 closes the volume 6 at the lower end 11 of the mold 1.
    [0006] With reference to FIG. 4, the core 20 comprises a cylindrical envelope 21 of flexible silicone extending along a longitudinal axis 22. The outside of the envelope 21 defines an outer wall 21.1 of the core 20. A first end 23 of the casing 21 is closed by a substantially spherical cap 24 while the other end 25 is closed by a plug 26. The outer wall 21.1 comprises conical protuberances 27 of wedging in positioning the core 20 projecting in directions substantially 30 perpendicular to the longitudinal axis 22. The plug 26 is traversed by an inlet end 28 and an outlet end 29 of a conduit 30 for circulating a U-shaped refrigerant 31 and extending along the longitudinal axis 22. The plug 26 is also traversed by an end 32 of a conduit 33 for filling and draining the water from the envelope 21. According to a preferred embodiment, the wall 21.1 has a rough surface condition as well as circular grooves 34 on a portion of about 300 millimeters measured from the end 25. According to a preliminary step of the first embodiment of the molding process, the envelope 21 is placed in a chamber 40 of a mold 41 whose inner wall has a shape identical to the desired outer shape of the core 20 (Fig. 6a). Once the casing 21 is in place, a water supply pipe is connected to the end 32 of the duct 33. The casing 21 is filled with water and then comes to press against the inside wall of the chamber 40 .
    [0007] When completely filled with water, the envelope 21 takes the form of the inner wall of the chamber 40. A refrigerant 31 is then circulated in the conduit 30 and solidifies the water in the envelope 21 turning it into ice. The envelope 21 thus shaped is then demolded, for example by separating the mold 41 into two half-molds. A core 20 is then obtained having a solidified shell 21 having a defined shape, namely a cylinder provided with conical protuberances.
    [0008] The core 20 is then placed in the mold 1 so that the outer wall 21.1 of the core 20 delimits with the inner wall 6.1 of the mold 1 a receiving volume 50 (Figures 6b and 6c). The distal ends of the conical protuberances 27 of the core 20 come into contact with the inner wall 6.1 of the mold 1 and carry out the centering of the core 20 in the mold 1. In the following step, the injection of BFUP 51 is carried out. so as to fill the reception volume 50 (Figure 6d). As the UFUP 51 is taken, a hot heat transfer fluid 52 is circulated in the conduit 30. Under the effect of the heat of the fluid 52, the ice contained in the casing 21 is liquefied. and the melt water is discharged through the conduit 33. This allows to control a progressive change in the shape of the core 20 which accompanies the withdrawal of the UHPC 51. Once the majority of the ice contained in the envelope 21 has been liquefied and evacuated, it ends up obtaining a shape of the core 20 allowing its extraction from the inside of the molded pile 100. The core 20 is then removed (Figure 6d) and the two half-molds 2 and 3 are separated, allowing the demolding of the pile 100 (Figure 6f). A pile 100 made of UHPCF is then obtained whose inner wall 102 has a rough surface state as well as circular striations 108 in its upper part, resulting from the respective printing of the surface state, and circular striations 34 of the outer wall 21.1 of the core 20. The inner wall 102 of the pile also comprises conical cavities 109 resulting from the printing of the conical protrusions 27 of centering the core 20. The elements identical or similar to those previously described will bear an identical reference numeral to these in the description which follows of the second, third and fourth embodiments of the molding method according to the invention of a pile 110 in UHPC. The second embodiment of the method involves the mold 1 and a core 60 made from wax elements. With reference to FIG. 7, the core 60 comprises three cylindrical wax elements: a tip member 61, an intermediate member 62 and an end member 63 interconnected by wax shafts 64 and 65 cooperating with cavities axial cylindrical 61.1, 62.1, 62.2, and 63.1 in the elements 61, 62 and 63. Each element 61, 62 and 63 comprises conical protrusions 27 and a rough surface condition. The end member 63 also includes circular ridges 34. Thus, the outer wall 60.1 of the core 60 is provided with a rough surface condition and circular ridges 34. The core 60 is firstly in place. in the mold 1 so that its outer wall 60.1 delimits with the inner wall 6.1 of the mold 1 a receiving volume 50 (Figures 8a and 8b). As shown in FIG. 9, it may be advantageous to previously arrange on the core 60 (for example by gluing) centering wedges 70 of substantially conical shape so as to center the core 60 in the mold 1. These centering wedges 70 can advantageously be made of silicone. In the next step, BFUP 51 is injected so as to fill the reception volume 50 (FIG. 8c). As the UFUP 51 is taken up, the core 60 is heated, here by injection of hot water or of expanded steam onto and into the core 20, for example by means of a cannula. Under the effect of heat, the wax of the elements 61 to 65 softens and causes a gradual change in the shape of the core 60 that accompanies the withdrawal of the UHPC 51 (Figures 8d). Extraction of the core 60 from the inside of the molded pile 100 is performed when fully molten. The two separate and the pile 100 is then obtained an inner pile 102 has a state 30 circular streaks 108 elements 61 to 65 have half-molds 2 and 3 are demolded (Figure 5f). There is a BFUP whose rough surface wall, and in its upper part, resulting from the respective printing of the surface state, and the circular grooves 34 of the outer wall 61.1 of the core 60. According to a third embodiment, the method comprises the further step of arranging a metal flange 80 at the inlet of the mold 1 prior to the introduction of the UHPC into the mold 1. Referring to FIG. 10, this flange 80 comprises a portion of a cylinder right 81, one end 82 5 comprises a radial annular portion 83. The portion 83 comprises three circular holes 83.1, 83.2 and 83.3 opening respectively on cylindrical sleeves 84.1, 84.2 and 84.3 whose end opposite to the portion 83 is closed. The sleeves 84.1 to 84.3 also contribute to the fastening of the flange 80 with the UHPC and are adapted to receive cylindrical rods 85. The steps 11.a to 11.f of the method according to this third embodiment are identical to the steps 8 .a to 8.f of the second embodiment of the method. However, an additional step, shown in FIG. 12, consists in arranging a metal flange 80 at the inlet of the mold 1 prior to the introduction of the UHPC into the mold 1. The resulting BFUP 120 then comprises a flange 80 which makes it possible to preserve the upper end 103 of the pile 120 during its threshing. According to the fourth embodiment described with reference to FIGS. 13 and 14, the tip portion 61 of the core 60 is replaced by a portion 66 identical to the end portion 63 (FIG. 13). The core 67 thus obtained is intended to be placed in a mold 68 similar to the mold 1 but whose conical portion 9 of the lower end 11 is replaced by a flat transverse portion 69. The steps 15a to 15.f of the method 30 according to this fourth embodiment corresponds to the steps 11.a to 11.f and 12 of the third embodiment of the method. However, an additional step, shown in FIG. 16, consists in arranging a metal flange 80 at the lower end 11 of the mold 1 prior to the introduction of the core 67 into the mold 1. The BFUP 130 pile thus obtained then comprises a first collar 80 at its lower part and a second collar 80 at its upper part. The collars 80 serve to protect the ends 5 of the piles 120 and 130 when they are beaten and also allow the upper end of a pile 120 or 130 to be secured to the lower end of a pile 130 by welding of two adjacent flanges 80.
    [0009] The piles 100, 110 and 120 can be advantageously beaten in a ground and easily leveled when they arrive in refusal. This has an advantage over prefabricated beaten piles in terms of handling and implementation time. Indeed, the tubular piles 100 and 110 are lighter than the massive prefabricated piles and can be cut more easily. Piles 100 and 110 may also be placed in boreholes and subsequently receive reinforcement and / or grout of cement or second phase concrete. Finally, these piles 100 and 110 can also be used to perform a soil injection. In the case of such a use, it will be possible in the factory or on site to drill peripheral holes in the pile 100 or 110 if it is desired to use injection pumps of moderate power. fourth according to a particular embodiment detailed in Figures 16 and 17, the centering of the core 60 is made using three son 90 prestressing. The wires 90 are notched and of relatively small diameter here four millimeters in diameter. These wires 90 extend between two flanges 80 placed at the ends of the mold 1 and which receive the ends 91 of these wires in holes 92. As can be seen in FIG. 17, the core 60 comprises three semi-cylindrical longitudinal grooves 35 93 whose walls 3033514 14 come into contact with at least a portion of the outer surface of the son 90. 96 semicylindrical recesses of diameter greater than that of the grooves 93 extend coaxially with them on regularly distributed portions 1 of length 1 along the length of each groove 93. Additionally, the core 60 also makes recesses 97 corresponding to the volumes located vertically above the intermediate elements 62. These recesses are preferably located at 600 millimeters from each other and have a length 1 of 80 millimeters. Ideally, the recesses 96 have a diameter greater than twelve millimeters in diameter of the wires 90. The manufacture of a pile 120 according to the fourth embodiment will be described with reference to Figs. 18a to 18e. The ends 91 of the wires 90 are passed through the holes 92 of a first flange 80 positioned at a first end of the half-mold 2 and 20 extend over the entire length thereof (FIG. 18a). The core 60 is presented to align the grooves 93 with the ends 91 of the wires 90. The core 60 is then slid between the cables 90, guided by them (Figure 18b). A second collar 80 is put in place at the second end of the half-mold 2 and the ends 91 of the wires 90 are passed through the holes 92 (FIG. 18c). The half-mold 3 is fixed on the half-mold 2 and the ends 91 of the wires 90 are stretched to prestress the wires 90 (FIG. 18d). The core 60 is held in position between the wires 90 engaged in the grooves 93 and is then centered in the mold 1, delimiting the receiving volume 50. The casting steps of the UHPCF and extraction of the core 60 are identical to those of FIG. previously exposed. The recesses 96 and 97 are filled with UHPCF during casting and provide both effective anchoring of the wires 90 and sufficient embedding (here, a minimum of six millimeters for the recesses 96) around the wires 90. Once the UHPC is complete, the tension applied to the ends 91 of the wires 90 is released and the pile 120 is demolded (FIG. 18e). The free ends 91 of the wires 90 can be used to handle the pile 120. This embodiment is also suitable for centering the flexible shell core. According to a particular use detailed in FIG. 20, it is possible to assemble one or several piles 130 with a pile 120. The assembly is done by inserting cylindrical rods 85 through holes 83.1 to 83.3 so that they are received in the sleeves 84.1 to 84.3 of the pile 120. The rods 85 are of a length such that they protrude from the upper end 103 of the pile 120. A pile 130 is then presented so that the bores 83.1 to 83.4 face the ends of the rods 8.5 received in the sleeves 84.1 to 84.3 of the flange 80 of the pile 120. A relative translation of the piles 120 and 130 then makes it possible to engage the ends of the rods 85 in the sleeves the flange 80 located in the lower part 25 of the pile 130. The flanges 80 adjacent the piles 120 and 130 are then assembled by welding. This method of assembly can be reproduced so as to make a pile of the desired length using prefabricated elements.
    [0010] It is also possible, as shown in FIG. 19, to combine one or more piles 120 with a solid tip element 94 made of BFUP and provided with a flange 80. The connection of the tip element 94 to the pile 120 is made by means of the cylindrical rods 85 and the flanges 80 of the tip member and the pile 203 are welded together. Advantageously, a head member 95 full of UHPC, and also provided with a flange 80, is attached in the same manner as the head element 94 on the other end of the pile 120.
    [0011] This makes it possible to respond to any pile configuration by storing only a small number of parts: tip members 94, head members 95, and piles 120. The method according to the invention is also applicable to molding portions of tubular or hollow parts, such as half-spheres or portions of large diameter tubes. In this case, the inner element (the core) is rigid - for example metal - and the outer element (the mold) is deformable on command, for example made of wax or polymer. The removal of the UHPCF is not hindered on the arc of the core or in the flexible mold, the part does not undergo any constraint when it is taken. Of course, the invention is not limited to the embodiments described but encompasses any variant within the scope of the invention as defined by the claims. In particular, although here the method of the invention is described in connection with the manufacture of a pile, the invention also applies to the manufacture of other types of parts, such as for example tubular parts. pipes or nozzles as well as tubular parts with at least one end closed such as tanks, relays, junction boxes or poles; - Although here the method of the invention is described in connection with the manufacture of a pile of 200 mm outside diameter, the invention 3033514 17 also applies to the manufacture of piles of different diameter, preferentially understood between 120 and 240 millimeters but also diameters less than 120 millimeters or greater than 240 millimeters; the stake may have other shapes, internal and / or external, than those described; although here the core is provided with conical centering protuberances, the invention also applies to a core devoid of such protuberances, or provided with other centering means such as nipples or rings; the invention applies to other forms of associated cavities and protuberances, such as, for example, striations, pyramidal indentations or any shape; although here the mold comprises two half-molds provided with notched tabs intended to cooperate with jamming cleats, the invention also applies to a mold that can separate in more than two parts and whose parts are interconnected. by other securing means such as straps, bolts, bolted flange assembly, or jacks; although here the shell of the core is silicone, the invention is also applicable to other types of polymers such as rubber, PVC or coated fabric; Although here the core is shaped by water filling and solidification thereof, the invention is also applicable to other means of conforming the core such as for example inflation with compressed air; Although here the receiving volume is filled by injection of pressurized UHPC, the invention also applies to a gravitational introduction of UHPC in the receiving volume; Although here the core 60 comprises three cylindrical wax elements connected to each other by wax shafts, the invention also applies to a single-piece wax core or made from the assembly of a different number. elements; although here the wax core is heated by injection of hot water or expanded steam into and on the core, the invention is also applicable to other means for heating the core such as heating in a oven, induction or microwave; although here the shims are silicone and reported on the core, the invention is also applicable to other types of centering wedges such as shims made of other polymeric materials or shims centering in the form of protrusion provided during the realization of the core elements; Although here the centering wedges are of substantially conical shape, the invention is also applicable to other forms of wedge such as cylindrical, pyramidal or any other wedge-shaped wedges; Although here the introduction of one or two metal flanges has been described in relation to a wax core, the invention also applies to the placement of one or two metal flanges in the frame. the use of any other type of core, such as an elastomeric core; although here the process has been described in the context of the implementation of UHPC, the invention also applies to the implementation of other material comprising cement such as standard concrete or mortar; although here the method has been described in connection with the molding of an externally smooth tube and whose internal surface is engraved, the invention is also applicable to other surface state configurations, such as tubes whose inner face is smooth and the outer face is engraved; although here the process has been described in the molding of a complete tubular element, the invention is also applicable to the production of half-tubes or fractions of large diameter tubes. In this case, the mold and the core are semi-cylindrical; Although here the process has been described for an externally smooth and internally formed tube, it is also applicable to internally smooth tubes formed externally. In this case, the inner core 25 is rigid and the outer mold is deformable (wax or polymer). The withdrawal of the UHPC is then constrained neither on the arc of the nucleus nor in the flexible mold; although here the centering of the core is achieved by means of three prestressing wires, the invention also applies to a different number of prestressing wires, for example two, or more than three; although here the diameter of the prestressing wires is four millimeters, the invention also applies to prestressing wires of smaller or larger diameter, between one and twenty millimeters; 5 - although here prestressing son are anchored to a length of 80 millimeters, the invention also applies to prestressing son anchored on different lengths, higher or lower. The distance separating the rings as well as the thickness of the coating around the prestressing wires are parameters whose values given for information in the description can be adapted; Although here the process has been described for the molding of a complete tube, it also applies to the production of half-tubes or fractions of tubes of large diameter. In this case, the mold and the core are semi-cylindrical; although here the process has been described for an externally smooth and internally formed tube, it is applied to internally smooth tubes and formed externally or for tube portions. In this case, the inner core is rigid and the outer mold is deformable on command. In this configuration, the removal of the UHPC is constrained neither on the arc of the core, nor by the deformable mold; although here the method has been described for a tube, it also applies to the molding of straight lower chord and bent upper web members connected by a web. In this case, deformable cores 3033514 21 arranged on either side of a core (prefabricated or defined by the mold) take the form of a band of peripheral wax. For the purposes of the present description, a mortar 5 is a mixture comprising a hydraulic binder composed of cement or a mixture of cement and vitrified ground blast furnace slag, a detrital rock load with a particle size of between 64 micrometers (pm) and 2 millimeters (mm) in a standard commercial tolerance and optional adjuvants such as substances intended to modify the consistency of the concrete, its setting time, its tightness or its resistance to freezing. Finally, the mortar may also comprise synthetic fibers, but not metal fibers. Reference is made to standard NF EN 206-1 for the definition of concretes.
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. A process for molding a part (100, 110) made of a material comprising cement, comprising the steps of: placing a first element (20, 60) facing a second element (1) in such a way as to that the outer wall (21.1, 60.1) of one of the elements (20, 60) delimits with the inner wall (6.1) of the other element (1) a receiving volume (50), the shape of one of the elements (20, 60) being modifiable to order; - introducing the material comprising cement (51) so as to fill the receiving volume (50); -commander a progressive modification of the shape of one of the elements (20, 60) as and when taking the material comprising cement (51); demoulding the workpiece (20, 60).
    [0002]
    2. The molding method as claimed in claim 1, wherein the piece is tubular (100, 110), the method comprising the following steps: placing a core (20, 60) in a cylindrical mold (1) of in such a way that the outer wall (21.1, 60.1) of the core (20, 60) delimits with the inner wall (6.1) of the mold (1) a tubular receiving volume (50), the shape of the core (20, 60 ) being editable on command; - introducing the material comprising cement (51) so as to fill the tubular receiving volume (50); -Commander a progressive change in the shape of the core (20, 60) as the setting material containing cement (51) takes until a core shape (20, 60) to extract it tubular piece (100, 110) after at least partial gripping of the material having cement (51); Retaining the core (20, 60); demoulding of the tubular piece (20, 60).
    [0003]
    The method of claim 1 wherein the cementitious material is ultra high performance fiber concrete.
    [0004]
    4. The method of claim 1, wherein the material comprising cement is mortar.
    [0005]
    5. The method of claim 2, wherein the core (20, 60) is at least partially made of wax.
    [0006]
    6. Method according to claim 2, wherein the core (20, 60) is manufactured at least partially from a flexible envelope (21).
    [0007]
    The method of claim 6, including the step of placing the flexible envelope (21) in a mold (40) having the desired shape of the core (20, 60) to conform the flexible envelope (21) to the desired shape.
    [0008]
    The method of claim 2, comprising the further step of centering the core (20, 60) in the cylindrical mold (1).
    [0009]
    The method of claim 2, wherein an outer surface (21.1, 60.1) of the core (20, 60) is shaped to print a rough surface condition on the inner surface of the tubular member (100, 110).
    [0010]
    The method of claim 2 including the further step of providing at least one flange (80) within the mold (1).
    [0011]
    Tubular pile (100, 110) of ultra-high performance fiber-reinforced concrete molded according to the method of any one of the preceding claims.
    [0012]
    12. Core (20, 60) customizable form for the implementation of the method according to any one of the preceding claims.
    [0013]
    13. Core (20, 60) according to claim 12, comprising a flexible envelope (21) intended to be filled with a solidified liquid, the envelope comprising at least one conduit (30) for circulating a refrigerant (31) and a conduit (33) for filling and emptying the liquid opening inside a volume 5 defined by the flexible envelope (21).
    [0014]
    14. Core (20, 60) according to claim 12, wherein the casing (21) is silicone.
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    FR3002956A1|2014-09-12|PRECONTRATED MOLDED WALL AND METHOD OF MAKING SUCH A WALL
    FR2548949A1|1985-01-18|Prestressed concrete pipe mould
    FR2889574A1|2007-02-09|TUBULAR STRUCTURE DEPLIABLE
    CH677250A5|1991-04-30|
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    EP0481850B1|1994-12-14|Method and apparatus for shrink-fitting a composite sleeve around a core and maintaining the core under pressure
    FR2634856A1|1990-02-02|Concrete pipe
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    BE488032A|1949-09-22|Method and device for producing pre-stressed hollow structures radially applicable in particular to underground works
    FR2600749A1|1987-12-31|Method for internally lining a pipeline, lining tube for implementing it, and method for producing this tube
    JP2005288835A|2005-10-20|Method for centrifugal force molding of concrete pipe for fiber-reinforcement screwing
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    同族专利:
    公开号 | 公开日
    WO2016142540A1|2016-09-15|
    FR3033514B1|2017-12-01|
    EP3268195A1|2018-01-17|
    US20180071953A1|2018-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1554585A|1925-03-17|1925-09-22|Lake Simon|Molding apparatus|
    US2405254A|1943-03-02|1946-08-06|Kellogg M W Co|Mold core|
    US2482949A|1946-03-29|1949-09-27|Tankovich Nicholas|Concrete pipe forming machine|
    US3476351A|1967-07-03|1969-11-04|Harold D Burdett|Expandable form for hollow-core concrete construction|
    US3608051A|1969-03-07|1971-09-21|Columbia Fabricators Inc|Wax mold casting of concrete|
    FR2424116A1|1978-04-28|1979-11-23|Tardieu Andre|Frozen void former for concrete - consists of water or water bound materials with wall thickness chosen to provide desired structural properties|
    EP1741838A2|2005-07-08|2007-01-10|Betonson B.V.|Method for preparing a pile provided with fill-elements and pile|
    EP2148011A1|2008-07-25|2010-01-27|Bauer Spezialtiefbau GmbH|Pole element|
    CH92355A|1921-04-05|1922-05-16|Siegwart Hans|Core model for the manufacture of cement pipes.|
    DD203494A1|1982-03-01|1983-10-26|Inst Stahlbeton Zentr F Forsch|DEVICE FOR HEAT TREATMENT IN THE MANUFACTURE OF CONCRETE ELEMENTS|
    JPH0647822B2|1982-12-21|1994-06-22|宇部興産株式会社|High strength concrete pile|
    KR100500806B1|2003-06-10|2005-07-11|농업기반공사|Recording devices for curing temperature history on precast concrete|
    NL2007738C2|2010-11-08|2012-06-27|Hattum & Blankevoort Bv|METHOD FOR CONTROLLED MANAGEMENT OF PURIFICATION OF YOUNG CONCRETE IN PRODUCTION SITUATIONS.|IT201700027122A1|2017-09-20|2019-03-20|Adriano Catanese|Element in prefabricated reinforced concrete of square section or in any case polygonal, constant or truncated cone, having a solid section or hollow, with possibly rounded corners, internally provided with tubes connected to the outside of the element in a transverse direction, possibly inclined, through which it is It is possible to perform, based on the size of the pipes, pumpable concrete jets or high or low pressure injections of fluids such as cement mixtures, expanding polyurethane resins, generic resins that, coming out of the element, create a stable connection between the reinforced concrete element and the continuum in which it is installed, be it a land or other prefabricated structure or element, installed with the function of a foundation pile, tie rod, aerial post, bridge pile, part of a shoulder bridge, prefabricated pillar, part of Berlin or other special work.|
    USD945235S1|2019-08-30|2022-03-08|Imdex Technology USA LLC|Drive sub for a drilling tool|
    CN112917641A|2021-01-23|2021-06-08|邓杰|Concrete perforated brick casting molding processing system|
    法律状态:
    2016-03-21| PLFP| Fee payment|Year of fee payment: 2 |
    2016-09-16| PLSC| Publication of the preliminary search report|Effective date: 20160916 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 3 |
    2018-03-23| PLFP| Fee payment|Year of fee payment: 4 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-03-23| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1552061A|FR3033514B1|2015-03-12|2015-03-12|METHOD FOR MOLDING TUBULAR ELEMENTS IN MATERIAL COMPRISING CEMENT AND PIEU THUS OBTAINED|FR1552061A| FR3033514B1|2015-03-12|2015-03-12|METHOD FOR MOLDING TUBULAR ELEMENTS IN MATERIAL COMPRISING CEMENT AND PIEU THUS OBTAINED|
    US15/557,626| US20180071953A1|2015-03-12|2016-03-11|Method for moulding tubular elements made from a material comprising cement, and pile thus obtained|
    PCT/EP2016/055372| WO2016142540A1|2015-03-12|2016-03-11|Method for moulding tubular elements in a material comprising cement, and pile thus produced|
    EP16712283.7A| EP3268195A1|2015-03-12|2016-03-11|Method for moulding tubular elements in a material comprising cement, and pile thus produced|
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