WO2021151512A1 - Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device - Google Patents

Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device Download PDF

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Publication number
WO2021151512A1
WO2021151512A1 PCT/EP2020/052501 EP2020052501W WO2021151512A1 WO 2021151512 A1 WO2021151512 A1 WO 2021151512A1 EP 2020052501 W EP2020052501 W EP 2020052501W WO 2021151512 A1 WO2021151512 A1 WO 2021151512A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal plate
section profile
square section
concrete member
fixing device
Prior art date
Application number
PCT/EP2020/052501
Other languages
French (fr)
Inventor
Wladimir Trubnikow
Eugen UNRUH
Wolfgang Bauer
Original Assignee
Framatome Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Framatome Gmbh filed Critical Framatome Gmbh
Priority to PCT/EP2020/052501 priority Critical patent/WO2021151512A1/en
Publication of WO2021151512A1 publication Critical patent/WO2021151512A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/48—Dowels, i.e. members adapted to penetrate the surfaces of two parts and to take the shear stresses
    • E04B1/483—Shear dowels to be embedded in concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
    • E04B1/2403—Connection details of the elongated load-supporting parts
    • E04B2001/2463—Connections to foundations

Definitions

  • Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device
  • the present invention generally concerns a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant.
  • the present invention also concerns a method for fixing a component to a concrete member of a nuclear power plant and to a set of a metal plate and a square section profile for forming a fixing device.
  • the present invention relates to the domain civil engineering in nuclear power plants, notably of mechanical fixing of components to a concrete wall of such nuclear power plants.
  • supply components such as cables or piping for transporting liquid or gaseous media
  • supply components induce high mechanical loads, for example due to their intended function and an internal system pressure of the components.
  • these high mechanical loads must be transmitted to the concrete member.
  • anchors are fixed to the concrete member, and the supply components are fixed on these anchors.
  • the anchors comprise for example a metal plate that is fixed to the concrete member.
  • the metal plates are large which requires in general a lot of space on the concrete member surface for each supply component so that static requirements are met.
  • elements fixing the metal plates to the concrete member must present a minimum required distance one of another on the surface of the concrete member.
  • the available surface area of the concrete member is often occupied by existing fixing devices for fixing supply components to the concrete member. Adding of further fixing devices on the concrete wall may require changes of the existing fixing devices, which induces complex planning and mechanical work.
  • An object of the present disclosure is to provide a fixing device that is configured to reduce the required space on the concrete member, and to meet requirements of mechanical load transmission.
  • a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant comprises a metal plate adapted to extend in parallel to the concrete member, the metal plate being configured to be fixed to the supply component and having a rear side adapted to face the concrete member, and a square section profile having a rectangular hollow cross section.
  • the square section profile is welded on a rear side of the metal plate and to be embedded in the concrete member, such that the square section profile is filled with concrete and/or mortar, the square section profile being configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the rear side of the metal plate.
  • the fixing device according to this invention allows to reduce the surface area at the concrete member due to a reduction of the dimensions of the fixing device.
  • the fixing device allows respecting given space restrictions on the concrete member surface and to meet all requirements for load transmission.
  • the square section profile allows reducing the required size of the metal plate for a given load, such as excentric forces, i.e. forces that apply on the metal plate on a point outside of a center of the metal plate, for example in a direction in a direction parallel to the surface of the concrete member, such as shear forces, and/or rotational or torsional moments, to be transmitted to the concrete member.
  • excentric forces i.e. forces that apply on the metal plate on a point outside of a center of the metal plate, for example in a direction in a direction parallel to the surface of the concrete member, such as shear forces, and/or rotational or torsional moments
  • the square section profile is configured for transmitting, between the metal plate and the concrete member, all torsional moments applied on a front side of the metal plate (supply component support) and forces applied on the metal plate in a parallel direction to the rear side of the metal plate. Less or no dowels are required for fixing the metal plate to the concrete member, because it remains that optional dowels transmit axial uplifting forces into the concrete only. As a consequence, the metal plate presents a reduced size.
  • the metal plate allows easy fixing of the supply component to the concrete member via said metal plate.
  • the metal plate comprises at least two holes for fixing the metal plate by at least two dowels to the concrete member, wherein the dowels are configured for transmitting forces along a direction perpendicular to the rear side of the metal plate.
  • the dowels are provided on opposed sides of the square section profile.
  • the fixing device further includes a bar extending from the metal plate in an opposite direction of the square section profile, wherein the bar is adapted to be fixed to the supply component.
  • the rear side of the metal plate is adapted to be arranged spaced apart from the concrete member, such that a space is formed between the rear side of the metal plate and the concrete member.
  • the space is intended to comprise surface a surface leveling material, for example screed or plaster.
  • the supply components are at least one cable and/or at least one piping for transporting liquid and/or gaseous media.
  • the square section profile is rigid, in particular made of metal, for example steel.
  • the metal plate comprises a plurality of ventilation holes configured for allowing access to an inner space of the square section profile from a front side of the metal plate being opposite to the rear side.
  • the invention further relates to a method for fixing at least one supply component to a concrete member of a nuclear power plant comprising: welding a square section profile having a rectangular hollow cross section on a rear side of a metal plate intended to extend in parallel to the concrete member; embedding the square section profile in the concrete member, such that the square section profile is filled with concrete and/or mortar, wherein the square section profile is configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the concrete member; and fixing the supply component to the metal plate.
  • such method may comprise the following feature:
  • the square section profile is arranged such that the rear side of the metal plate is spaced apart from the concrete member, such that a space is formed between the rear side of the metal plate and the concrete member.
  • the invention also relates to a set of a metal plate and a square section profile for forming a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, the metal plate being adapted to extend in parallel to the concrete member, to be fixed to the supply component and having a rear side adapted to face the concrete member, the square section profile having a rectangular hollow cross section, the square section profile being adapted to be welded on the rear side of the metal plate and to be embedded in the concrete member, such that the square section profile is filled with concrete and/or mortar, the square section profile being configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the concrete member.
  • such set may comprise the following feature:
  • FIG. 1 is a schematic partial section of a wall section view of a concrete wall and a fixing device according an embodiment in a sectional plane E of figures 2 or 3 being on the concrete wall surface,
  • FIG. 2 is a schematic section view according to section A-A of figure 1 , showing the fixing device fixed on a concrete wall without screed or plaster, and
  • FIG. 3 is a schematic section view according to section B-B of figure 1 , showing the fixing device fixed on a concrete wall with screed or plaster.
  • an assembly 1 of a nuclear power plant comprising a concrete member, such as a concrete wall 2 of the nuclear power plant and a fixing device 4 for fixing at least one supply component (not shown) to the concrete wall 2 is shown.
  • the supply component(s) is/are fixed via the fixing device 4 to the concrete wall 2.
  • the concrete member is a member different from a concrete wall, such as a floor or a ceiling.
  • concrete wall it is understood that the wall comprises concrete, in particular at the section to which the fixing device is mounted.
  • the supply component comprises for example at least one line of piping for transporting fluids or gas and/or at least one cable.
  • the fixing device 4 comprises a metal plate 10 adapted to extend in parallel to the concrete wall 2 and a square section profile 12.
  • the metal plate 10 has a rear side 14 adapted to face the concrete wall 2 and a front side 16 opposed to the rear side 14.
  • the metal plate 10 is represented with dotted lines, in order to show that figure 1 presents a partially sectional view in a plane E (shown in Figures 2 and 3) that represents the square section profile 12 configured to be arranged behind the metal plate 10 in the perspective direction of figure 1.
  • the metal plate 10 comprises a material that is weldable, such as weldable steel.
  • the metal plate 10 is configured to be fixed to the supply component, for example by welding a bar 32 supporting the supply component to the metal plate 10, notably to the front side 16.
  • the bar 32 is for example a section profile.
  • the metal plate 10 presents for example a thickness depending notably on the impact loads, a type and/or number of supply component(s) to be fixed to the metal plate 10.
  • the metal plate 10 presents a thickness comprised between 15mm and 30mm, for example about 25mm.
  • the metal plate 10 presents notably a rectangular form in a section parallel to the concrete wall 2 or the plane E.
  • the size depends in particular on the impact loads, form and number of supply components to be fixed to the metal plate 10.
  • the metal plate presents a width comprised between 200mm and 350mm, for example about 250mm and a height comprised between 500mm and 700mm, for example about 650mm.
  • the fixing device 4 in particular the metal plate 10, comprises further, at least one, in particular at least two bore holes 20, visible in particular in the example of figure 1.
  • at least two holes 20 are provided for fixing the metal plate 10 by dowels 18 to the concrete wall 2.
  • the holes 20 are located on opposed sides of the square section profile 12, as in particular visible in the example of figure 1.
  • the holes 20 are provided in a distance depending on the impact loads and the selected square section profile 12. .
  • the dowels 18 are, for example depending on static requirements, arranged on at least two opposed sides of the square section profile 12.
  • the dowels 18 are configured for transmitting forces along a direction perpendicular to the rear side 14 of the metal plate 10, in particular inside a deeper section of the concrete structural member. These forces are in particular forces that apply in a direction parallel to an axial direction of the dowels 18.
  • the dowels 18 are not configured to transmit fractions of forces in directions different from the direction perpendicular to the rear side 14 of the metal plate 10, such as parallel to the rear side 14.
  • the dowels 18 are of the type expansion bolt or dowels, such as of the type “HSL” or “FIDA(-T)” (registered trademarks).
  • the metal plate 10 comprises a plurality of ventilation holes 21 , shown in particular in figures 2 and 3.
  • the ventilation holes 21 allow filling of a filling material 22, such as a grout material, which develops compressive strength similar to concrete and embeds the square section profile 12 in a cavity 24 of the concrete wall 2.
  • the ventilation holes 21 are provided in the metal plate 10 for example to allow access to an inner space 30 of the square section profile 12 and/or to the outer section of the square section profile 12, in particular close to the outer surface of the square section profile 12, in particular when the plate is arranged on the concrete wall.
  • the square section profile 12 is configured to be fixed to the rear side 14 of the metal plate 10, in particular to be welded on the rear side 14.
  • the square section profile 12 is rigid. By “rigid”, it is understood that the square section profile 12 is configured to transmit a predefined maximum force between the metal plate 10 and the concrete wall 2 in the absence of a macroscopic deformation of the square section profile 12.
  • the design base loads to be transferred by the square section profile 12 are notably determined in function of the loads generated by the component supports to be fixed to the concrete wall 2.
  • the square section profile 12 is in particular made of metal, in particular steel.
  • the square section profile 12 has a hollow cross section 26, notably a rectangular hollow cross section.
  • the square section profile 12 comprises four flanks 28 delimiting the hollow cross section 26.
  • Each flank 28 of the square section profile 12 has for example a size between 80mm and 250mm, depending on structural design needs.
  • the square section profile 12 presents for example a length, in a direction perpendicular to the cross section of the square section profile 12, for example comprised between 150mm and 300mm.
  • the square section profile 12 forms the inner space 30 being delimited by the flanks 28 of the square section profile 12 and being delimited in length by the connection to the plate 10 and with an open section at the other end of the square section profile 12, along the direction perpendicular to the cross section.
  • the square section profile 12 is configured to be embedded in the concrete wall 2, such that the square section profile 12, and in particular the inner space 30, is filled with the filling material 22. As visible in the examples of figures 2 and 3, the square section profile 12 is configured to be embedded in the cavity 24 of the concrete wall 2.
  • the square section profile 12 is configured for transmitting, between the metal plate 10 and the concrete wall 2, at least one torsional moment applied on the metal plate 10.
  • the square section profile 12 is configured for transmitting the torsional moment that has an axis perpendicular to the rear side 14 of the metal plate 10.
  • the square section profile 12 is configured to transfer a plurality of torsional moments applied on the metal plate between the metal plate and the concrete wall.
  • the square section profile 12 is for example arranged in the center of the metal plate 10.
  • center of the metal plate it is understood the point of intersection of two diagonals connecting each two opposite edges on the rear side 14 of the metal plate 10 forming a rectangle.
  • the square section profile 12 is fixed to a zone of the rear side 14 comprising the center of the metal plate 10.
  • each flank 28 of the square section profile 12 is configured to transmit a part of the torsional moment from the metal plate 10 to the concrete wall 2.
  • each flank 28 is configured to transmit a substantially equally force on from another, resulting from the torsional moment, to the concrete wall 2.
  • the square section profile 12 is configured to transmit forces applied on the metal plate 10 along a direction in parallel to the rear side 14 of the metal plate 10, in particular, along a direction in parallel to the concrete wall 2.
  • the square section profile 12 is configured to transfer the components of forces that extend parallel to the concrete wall 2, up to the design loads.
  • the length of the square section profile 12, in a direction perpendicular to the cross section, and/or the length of the flanks 28 of the square section profile 12 is chosen in function of the design loads to be transmitted.
  • the fixing device 4 further includes a bar 32 extending from the metal plate 10 in an opposite direction of the square section profile 12.
  • the bar 32 is configured to be fixed to the metal plate 10 for example by welding.
  • the concrete wall 2 is provided with a surface layer 34 comprising a surface leveling material.
  • the surface leveling material is a material that is configured to provide, applied on the concrete wall, a plane surface of the wall.
  • the surface leveling material is for example screed or plaster.
  • the surface layer 34 is notably unable to absorb the design loads and/or to transmit the design loads to the concrete wall 2.
  • the surface layer 34 comprising a leveling material, for example of screed or plaster, is removed from the part of the surface of the concrete wall 2 corresponding to the size of the metal plate 10 to be fixed to the concrete wall 2, such that the metal plate 10 on its rear face 14 is directly in contact with the concrete wall 2.
  • the square section profile 12 is intended to be flush with the concrete wall 2.
  • the rear side 14 of the metal plate 10 is for example intended to be fixed to an end of the square section profile 12 flush with the concrete wall 2.
  • An embodiment of the fixing device 4 will now be described with reference to figure 3.
  • the rear side 14 of the metal plate 10 is for example adapted to be arranged spaced apart from the concrete wall 2, such that a space 36 is formed between the rear side 14 of the metal plate 10 and the concrete wall 2.
  • the space 36 comprises the surface layer 34, for example of screed or of plaster.
  • the concrete wall 2 is provided with the surface layer 34 that is also present on the part of the surface of the concrete wall 2 on which the metal plate 10 is intended to be fixed.
  • the square section profile 12 is intended to protrude from the concrete wall 10.
  • the square section profile 12 is configured to be arranged such that it is flush with the outer surface of the surface layer 34.
  • the dowels 18 are configured to traverse the surface layer 34 and to be fixed in the concrete wall 2.
  • the dowels 18 are notably unable to transmit forces along a direction parallel to the concrete wall 2 between the metal plate 10 and the concrete wall 2.
  • the square section profile 12 is configured to transmit the forces along a direction parallel to the rear side 14 of the metal plate 10 between the metal plate 10 and the concrete wall 2, in the absence of forces applied on the dowels 18 along this direction.
  • the square section profile 12 is welded on the rear side 14 of the metal plate 10.
  • the metal plate 10 is intended to extend in parallel to the concrete wall 2.
  • the square section profile 12 is embedded in the concrete wall 2, for example by the square section profile 12 that is filled with a filling material 22, such as concrete and/or mortar.
  • the square section profile 12 is arranged such that the rear side 14 of the metal plate 10 is spaced apart from the concrete wall 2, once the metal plate 10 is fixed to the square section profile 12, and once the square section profile 12 is embedded into the concrete wall 2.
  • the space 36 is formed between the rear side 14 of the metal plate 10 and the concrete wall 2.
  • the square section profile 12 is embedded into the concrete wall 2 such that it is flush with the surface layer 34.
  • the square section profile 12 transmits, between the metal plate 10 and the concrete wall 2, the at least one torsional moment applied on the metal plate 10 and the forces applied on the metal plate 10 along a direction in parallel to the rear side 14 of the metal plate 10, when the filling material 22 has cured.
  • the supply component is fixed by welding to the metal plate 10, in particular via the bar 32.
  • the supply component is fixed to the metal plate 10 by means of the bar 32.
  • a first end of the bar 32 is fixed to the metal plate 10, in particular by welding, and a second end of the bar 32, opposed to the first end of the bar 32, is fixed to the supply component, for example by welding or by another fixing method such as gluing or riveting.
  • the embedding step is executed after the welding step of welding the square section profile 12 to the rear side 14.
  • the square section profile 12 is welded to the metal plate 10 at a location distant from the concrete wall 2, for example in a production facility geographically distant from the nuclear power plant.
  • the square section profile 12, welded to the metal plate 10 is introduced into the cavity 24 of the concrete wall 2.
  • the metal plate 10 is provided with the ventilation holes.
  • the concrete and/or mortar is introduced into the cavity 24 via one of the ventilation holes.
  • the metal plate 10 and the square section profile 12 are for example a set forming the fixing device 4 for fixing the supply component to the concrete wall 2 of the nuclear power plant.
  • the fixing device 4 allows to reduce the surface of the concrete member 2 occupied by the fixing device 4.
  • the surface layer 34 under the metal plate 10 is not to be removed, as the dowels 18 are not subjected to a shear force along a direction parallel to the concrete wall 2.
  • the metal plate 10 is configured to be spaced apart from the concrete wall 2. Thanks to the square section profile 12, the dowels 18 do not receive any shear forces as the square section profile 12 is configured to transmit these forces between the metal plate 10 and the concrete wall 2.
  • the dowels 18 are of the type expansion bolts or stradding dowels, and thus less complex and/or expensive than undercut anchors, such as of the type “FIDA” of “HITLI” (registered trademarks) traditionally used.

Abstract

A fixing device (4) for fixing at least one supply component to a concrete member (2) of a nuclear power plant, the fixing device (4) comprising a metal plate (10) adapted to extend in parallel to the concrete member (2), the metal plate (10) being configured to be fixed to the supply component and having a rear side (14) adapted to face the concrete member (2), and a square section profile (12) having a rectangular hollow cross section. The square section profile (12) is welded on a rear side (14) of the metal plate (10) and to be embedded in the concrete member (2), such that the square section profile (12) is filled with concrete and/or mortar, the square section profile (12) being configured for transmitting at least one torsional moment applied on the metal plate (10) and forces applied on the metal plate (10).

Description

Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device
The present invention generally concerns a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant.
The present invention also concerns a method for fixing a component to a concrete member of a nuclear power plant and to a set of a metal plate and a square section profile for forming a fixing device.
The present invention relates to the domain civil engineering in nuclear power plants, notably of mechanical fixing of components to a concrete wall of such nuclear power plants.
The document US 2018/0258632 A1 discloses a device for fixing at least one attachment member to a concrete wall.
Generally, in nuclear power plants, many supply components, such as cables or piping for transporting liquid or gaseous media, are to be fixed to concrete members. Such supply components induce high mechanical loads, for example due to their intended function and an internal system pressure of the components.. In order to fix the supply components to the concrete member, these high mechanical loads must be transmitted to the concrete member. Generally, so-called anchors are fixed to the concrete member, and the supply components are fixed on these anchors. The anchors comprise for example a metal plate that is fixed to the concrete member.
In order to transmit the high mechanical loads, the metal plates are large which requires in general a lot of space on the concrete member surface for each supply component so that static requirements are met. For example, elements fixing the metal plates to the concrete member must present a minimum required distance one of another on the surface of the concrete member.
As a consequence, the available surface area of the concrete member is often occupied by existing fixing devices for fixing supply components to the concrete member. Adding of further fixing devices on the concrete wall may require changes of the existing fixing devices, which induces complex planning and mechanical work.
An object of the present disclosure is to provide a fixing device that is configured to reduce the required space on the concrete member, and to meet requirements of mechanical load transmission.
According to one aspect, a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant comprises a metal plate adapted to extend in parallel to the concrete member, the metal plate being configured to be fixed to the supply component and having a rear side adapted to face the concrete member, and a square section profile having a rectangular hollow cross section. The square section profile is welded on a rear side of the metal plate and to be embedded in the concrete member, such that the square section profile is filled with concrete and/or mortar, the square section profile being configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the rear side of the metal plate.
The fixing device according to this invention allows to reduce the surface area at the concrete member due to a reduction of the dimensions of the fixing device. Thus, the fixing device allows respecting given space restrictions on the concrete member surface and to meet all requirements for load transmission.
The square section profile allows reducing the required size of the metal plate for a given load, such as excentric forces, i.e. forces that apply on the metal plate on a point outside of a center of the metal plate, for example in a direction in a direction parallel to the surface of the concrete member, such as shear forces, and/or rotational or torsional moments, to be transmitted to the concrete member.
The square section profile is configured for transmitting, between the metal plate and the concrete member, all torsional moments applied on a front side of the metal plate (supply component support) and forces applied on the metal plate in a parallel direction to the rear side of the metal plate. Less or no dowels are required for fixing the metal plate to the concrete member, because it remains that optional dowels transmit axial uplifting forces into the concrete only. As a consequence, the metal plate presents a reduced size.
All said torsional moments and forces are transmitted by the square section profile instead of dowels, so that simultaneously the dowels utilization and the plate size can be reduced which concludes in a smaller plate size and a smaller minimum distance one from another.
Thus, the space required on the concrete member for the fixing device is reduced.
Furthermore, the metal plate allows easy fixing of the supply component to the concrete member via said metal plate.
Further embodiments may relate to one or more of the following features, which may be combined in any technical feasible combination:
- the metal plate comprises at least two holes for fixing the metal plate by at least two dowels to the concrete member, wherein the dowels are configured for transmitting forces along a direction perpendicular to the rear side of the metal plate.
- the dowels are provided on opposed sides of the square section profile.
- the square section profile is arranged in the center of the metal plate. - the fixing device further includes a bar extending from the metal plate in an opposite direction of the square section profile, wherein the bar is adapted to be fixed to the supply component.
- the rear side of the metal plate is adapted to be arranged spaced apart from the concrete member, such that a space is formed between the rear side of the metal plate and the concrete member.
- the space is intended to comprise surface a surface leveling material, for example screed or plaster.
- the supply components are at least one cable and/or at least one piping for transporting liquid and/or gaseous media.
- the square section profile is rigid, in particular made of metal, for example steel.
- the metal plate comprises a plurality of ventilation holes configured for allowing access to an inner space of the square section profile from a front side of the metal plate being opposite to the rear side.
The invention further relates to a method for fixing at least one supply component to a concrete member of a nuclear power plant comprising: welding a square section profile having a rectangular hollow cross section on a rear side of a metal plate intended to extend in parallel to the concrete member; embedding the square section profile in the concrete member, such that the square section profile is filled with concrete and/or mortar, wherein the square section profile is configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the concrete member; and fixing the supply component to the metal plate.
According to an advantageous but not mandatory aspect of the invention, such method may comprise the following feature:
- the square section profile is arranged such that the rear side of the metal plate is spaced apart from the concrete member, such that a space is formed between the rear side of the metal plate and the concrete member.
The invention also relates to a set of a metal plate and a square section profile for forming a fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, the metal plate being adapted to extend in parallel to the concrete member, to be fixed to the supply component and having a rear side adapted to face the concrete member, the square section profile having a rectangular hollow cross section, the square section profile being adapted to be welded on the rear side of the metal plate and to be embedded in the concrete member, such that the square section profile is filled with concrete and/or mortar, the square section profile being configured for transmitting, between the metal plate and the concrete member, at least one torsional moment applied on the metal plate and forces applied on the metal plate along a direction in parallel to the concrete member.
According to an advantageous but not mandatory aspect of the invention, such set may comprise the following feature:
- the square section profile and the metal plate are provided to construct a fixing device as described above.
These features and advantages of the invention will be further explained in the following description, given only as non-limiting examples, and with reference to the attached drawings, on which:
- Figure 1 is a schematic partial section of a wall section view of a concrete wall and a fixing device according an embodiment in a sectional plane E of figures 2 or 3 being on the concrete wall surface,
- Figure 2 is a schematic section view according to section A-A of figure 1 , showing the fixing device fixed on a concrete wall without screed or plaster, and
- Figure 3 is a schematic section view according to section B-B of figure 1 , showing the fixing device fixed on a concrete wall with screed or plaster.
In the following specification, the expression "substantially equal to" is understood to specify an equality of plus or minus 10 percent of the indicated value, preferably of plus or minus 5 percent of the indicated value.
With reference to figure 1 , an assembly 1 of a nuclear power plant comprising a concrete member, such as a concrete wall 2 of the nuclear power plant and a fixing device 4 for fixing at least one supply component (not shown) to the concrete wall 2 is shown. In particular, the supply component(s) is/are fixed via the fixing device 4 to the concrete wall 2. According to embodiments, the concrete member is a member different from a concrete wall, such as a floor or a ceiling.
By “concrete wall”, it is understood that the wall comprises concrete, in particular at the section to which the fixing device is mounted.
The supply component comprises for example at least one line of piping for transporting fluids or gas and/or at least one cable.
The fixing device 4 comprises a metal plate 10 adapted to extend in parallel to the concrete wall 2 and a square section profile 12.
As shown in figures 2 and 3, the metal plate 10 has a rear side 14 adapted to face the concrete wall 2 and a front side 16 opposed to the rear side 14.
In the example of figure 1 , the metal plate 10 is represented with dotted lines, in order to show that figure 1 presents a partially sectional view in a plane E (shown in Figures 2 and 3) that represents the square section profile 12 configured to be arranged behind the metal plate 10 in the perspective direction of figure 1.
The metal plate 10 comprises a material that is weldable, such as weldable steel. The metal plate 10 is configured to be fixed to the supply component, for example by welding a bar 32 supporting the supply component to the metal plate 10, notably to the front side 16. The bar 32 is for example a section profile.
The metal plate 10 presents for example a thickness depending notably on the impact loads, a type and/or number of supply component(s) to be fixed to the metal plate 10. For example, the metal plate 10 presents a thickness comprised between 15mm and 30mm, for example about 25mm.
The metal plate 10 presents notably a rectangular form in a section parallel to the concrete wall 2 or the plane E. The size depends in particular on the impact loads, form and number of supply components to be fixed to the metal plate 10. For example, the metal plate presents a width comprised between 200mm and 350mm, for example about 250mm and a height comprised between 500mm and 700mm, for example about 650mm.
According to embodiments, the fixing device 4, in particular the metal plate 10, comprises further, at least one, in particular at least two bore holes 20, visible in particular in the example of figure 1. For example, at least two holes 20 are provided for fixing the metal plate 10 by dowels 18 to the concrete wall 2.
According to an embodiment, the holes 20 are located on opposed sides of the square section profile 12, as in particular visible in the example of figure 1. The holes 20 are provided in a distance depending on the impact loads and the selected square section profile 12. .
Thus, the dowels 18 are, for example depending on static requirements, arranged on at least two opposed sides of the square section profile 12.
The dowels 18 are configured for transmitting forces along a direction perpendicular to the rear side 14 of the metal plate 10, in particular inside a deeper section of the concrete structural member. These forces are in particular forces that apply in a direction parallel to an axial direction of the dowels 18. For example, the dowels 18 are not configured to transmit fractions of forces in directions different from the direction perpendicular to the rear side 14 of the metal plate 10, such as parallel to the rear side 14. For example, the dowels 18 are of the type expansion bolt or dowels, such as of the type “HSL” or “FIDA(-T)” (registered trademarks).
According to embodiments, the metal plate 10 comprises a plurality of ventilation holes 21 , shown in particular in figures 2 and 3. The ventilation holes 21 allow filling of a filling material 22, such as a grout material, which develops compressive strength similar to concrete and embeds the square section profile 12 in a cavity 24 of the concrete wall 2. The ventilation holes 21 are provided in the metal plate 10 for example to allow access to an inner space 30 of the square section profile 12 and/or to the outer section of the square section profile 12, in particular close to the outer surface of the square section profile 12, in particular when the plate is arranged on the concrete wall.
The square section profile 12 is configured to be fixed to the rear side 14 of the metal plate 10, in particular to be welded on the rear side 14.
According to embodiments, the square section profile 12 is rigid. By “rigid”, it is understood that the square section profile 12 is configured to transmit a predefined maximum force between the metal plate 10 and the concrete wall 2 in the absence of a macroscopic deformation of the square section profile 12. The design base loads to be transferred by the square section profile 12 are notably determined in function of the loads generated by the component supports to be fixed to the concrete wall 2.
The square section profile 12 is in particular made of metal, in particular steel.
The square section profile 12 has a hollow cross section 26, notably a rectangular hollow cross section. For example, the square section profile 12 comprises four flanks 28 delimiting the hollow cross section 26. Each flank 28 of the square section profile 12 has for example a size between 80mm and 250mm, depending on structural design needs. The square section profile 12 presents for example a length, in a direction perpendicular to the cross section of the square section profile 12, for example comprised between 150mm and 300mm.
The square section profile 12 forms the inner space 30 being delimited by the flanks 28 of the square section profile 12 and being delimited in length by the connection to the plate 10 and with an open section at the other end of the square section profile 12, along the direction perpendicular to the cross section.
The square section profile 12 is configured to be embedded in the concrete wall 2, such that the square section profile 12, and in particular the inner space 30, is filled with the filling material 22. As visible in the examples of figures 2 and 3, the square section profile 12 is configured to be embedded in the cavity 24 of the concrete wall 2.
The square section profile 12 is configured for transmitting, between the metal plate 10 and the concrete wall 2, at least one torsional moment applied on the metal plate 10. In particular, the square section profile 12 is configured for transmitting the torsional moment that has an axis perpendicular to the rear side 14 of the metal plate 10.
According to embodiments, the square section profile 12 is configured to transfer a plurality of torsional moments applied on the metal plate between the metal plate and the concrete wall. The square section profile 12 is for example arranged in the center of the metal plate 10. By “center of the metal plate”, it is understood the point of intersection of two diagonals connecting each two opposite edges on the rear side 14 of the metal plate 10 forming a rectangle. For example, the square section profile 12 is fixed to a zone of the rear side 14 comprising the center of the metal plate 10.
When the square section profile 12 is fixed to the zone comprising the center, the transmission of the torsional moment(s), in particular of the torsional moment having an axis perpendicular to the rear side 14 of the metal plate 10, is improved. Indeed, each flank 28 of the square section profile 12 is configured to transmit a part of the torsional moment from the metal plate 10 to the concrete wall 2. For example, each flank 28 is configured to transmit a substantially equally force on from another, resulting from the torsional moment, to the concrete wall 2.
The square section profile 12 is configured to transmit forces applied on the metal plate 10 along a direction in parallel to the rear side 14 of the metal plate 10, in particular, along a direction in parallel to the concrete wall 2. In particular, the square section profile 12 is configured to transfer the components of forces that extend parallel to the concrete wall 2, up to the design loads. For example, the length of the square section profile 12, in a direction perpendicular to the cross section, and/or the length of the flanks 28 of the square section profile 12 is chosen in function of the design loads to be transmitted.
The fixing device 4 further includes a bar 32 extending from the metal plate 10 in an opposite direction of the square section profile 12. The bar 32 is configured to be fixed to the metal plate 10 for example by welding.
An embodiment of the fixing device 4 will now be described with reference to figure 2. As visible in the example of figure 2, the concrete wall 2 is provided with a surface layer 34 comprising a surface leveling material. The surface leveling material is a material that is configured to provide, applied on the concrete wall, a plane surface of the wall. The surface leveling material is for example screed or plaster.
The surface layer 34 is notably unable to absorb the design loads and/or to transmit the design loads to the concrete wall 2. For example, the surface layer 34 comprising a leveling material, for example of screed or plaster, is removed from the part of the surface of the concrete wall 2 corresponding to the size of the metal plate 10 to be fixed to the concrete wall 2, such that the metal plate 10 on its rear face 14 is directly in contact with the concrete wall 2.
For example, the square section profile 12 is intended to be flush with the concrete wall 2. The rear side 14 of the metal plate 10 is for example intended to be fixed to an end of the square section profile 12 flush with the concrete wall 2. An embodiment of the fixing device 4 will now be described with reference to figure 3. The rear side 14 of the metal plate 10 is for example adapted to be arranged spaced apart from the concrete wall 2, such that a space 36 is formed between the rear side 14 of the metal plate 10 and the concrete wall 2. The space 36 comprises the surface layer 34, for example of screed or of plaster.
For example, the concrete wall 2 is provided with the surface layer 34 that is also present on the part of the surface of the concrete wall 2 on which the metal plate 10 is intended to be fixed.
For example, the square section profile 12 is intended to protrude from the concrete wall 10. For example, the square section profile 12 is configured to be arranged such that it is flush with the outer surface of the surface layer 34.
For example, the dowels 18 are configured to traverse the surface layer 34 and to be fixed in the concrete wall 2. In such configuration, the dowels 18 are notably unable to transmit forces along a direction parallel to the concrete wall 2 between the metal plate 10 and the concrete wall 2. In particular, the square section profile 12 is configured to transmit the forces along a direction parallel to the rear side 14 of the metal plate 10 between the metal plate 10 and the concrete wall 2, in the absence of forces applied on the dowels 18 along this direction.
A method for fixing the at least one supply component to the concrete wall 2 of the nuclear power plant is now described.
In a welding step, the square section profile 12 is welded on the rear side 14 of the metal plate 10. The metal plate 10 is intended to extend in parallel to the concrete wall 2.
In an embedding step, the square section profile 12 is embedded in the concrete wall 2, for example by the square section profile 12 that is filled with a filling material 22, such as concrete and/or mortar.
According to embodiments, the square section profile 12 is arranged such that the rear side 14 of the metal plate 10 is spaced apart from the concrete wall 2, once the metal plate 10 is fixed to the square section profile 12, and once the square section profile 12 is embedded into the concrete wall 2. In particular, the space 36 is formed between the rear side 14 of the metal plate 10 and the concrete wall 2. For example, the square section profile 12 is embedded into the concrete wall 2 such that it is flush with the surface layer 34.
The square section profile 12 transmits, between the metal plate 10 and the concrete wall 2, the at least one torsional moment applied on the metal plate 10 and the forces applied on the metal plate 10 along a direction in parallel to the rear side 14 of the metal plate 10, when the filling material 22 has cured. In a fixing step, the supply component is fixed by welding to the metal plate 10, in particular via the bar 32.
According to embodiments, the supply component is fixed to the metal plate 10 by means of the bar 32. For example, a first end of the bar 32 is fixed to the metal plate 10, in particular by welding, and a second end of the bar 32, opposed to the first end of the bar 32, is fixed to the supply component, for example by welding or by another fixing method such as gluing or riveting.
According to embodiments, the embedding step is executed after the welding step of welding the square section profile 12 to the rear side 14. For example, in this welding step, the square section profile 12 is welded to the metal plate 10 at a location distant from the concrete wall 2, for example in a production facility geographically distant from the nuclear power plant. The square section profile 12, welded to the metal plate 10, is introduced into the cavity 24 of the concrete wall 2. The metal plate 10 is provided with the ventilation holes. The concrete and/or mortar is introduced into the cavity 24 via one of the ventilation holes.
The metal plate 10 and the square section profile 12 are for example a set forming the fixing device 4 for fixing the supply component to the concrete wall 2 of the nuclear power plant.
It will be understood that the present invention provides a number of advantages.
The fixing device 4 according to the invention allows to reduce the surface of the concrete member 2 occupied by the fixing device 4.
The surface layer 34 under the metal plate 10 is not to be removed, as the dowels 18 are not subjected to a shear force along a direction parallel to the concrete wall 2. For example, according to embodiments of the invention, the metal plate 10 is configured to be spaced apart from the concrete wall 2. Thanks to the square section profile 12, the dowels 18 do not receive any shear forces as the square section profile 12 is configured to transmit these forces between the metal plate 10 and the concrete wall 2.
Furthermore, thanks to the square section profile 12, the dowels 18 are of the type expansion bolts or stradding dowels, and thus less complex and/or expensive than undercut anchors, such as of the type “FIDA” of “HITLI” (registered trademarks) traditionally used.

Claims

1. Fixing device (4) for fixing at least one supply component to a concrete member (2) of a nuclear power plant, the fixing device (4) comprising a metal plate (10) adapted to extend in parallel to the concrete member (2), the metal plate (10) being configured to be fixed to the supply component and having a rear side (14) adapted to face the concrete member (2), and a square section profile (12) having a rectangular hollow cross section, characterized in that the square section profile (12) is welded on a rear side (14) of the metal plate (10) and to be embedded in the concrete member (2), such that the square section profile (12) is filled with concrete and/or mortar, the square section profile (12) being configured for transmitting, between the metal plate (10) and the concrete member (2), at least one torsional moment applied on the metal plate (10) and forces applied on the metal plate (10) along a direction in parallel to the rear side (14) of the metal plate (10).
2. The fixing device (4) according to claim 1 , wherein the metal plate (10) comprises at least two holes (20) for fixing the metal plate (10) by at least two dowels (18) to the concrete member (2), wherein the dowels (18) are configured for transmitting forces along a direction perpendicular to the rear side (14) of the metal plate (10).
3. The fixing device (4) according to claim 2, wherein the dowels (18) are provided on opposed sides of the square section profile (12).
4. The fixing device (4) according to one of the preceding claims, wherein the square section profile (12) is arranged in the center of the metal plate (10).
5. The fixing device (4) according to one of the preceding claims, wherein the fixing device (4) further includes a bar (32) extending from the metal plate (10) in an opposite direction of the square section profile (12), wherein the bar (32) is adapted to be fixed to the supply component.
6. The fixing device (4) according to any of the preceding claims, wherein the rear side (14) of the metal plate (10) is adapted to be arranged spaced apart from the concrete member (2), such that a space (36) is formed between the rear side (14) of the metal plate (10) and the concrete member (2).
7. The fixing device (4) according to claim 6, wherein the space (36) is intended to comprise surface a surface leveling material, for example screed or plaster.
8. The fixing device (4) according to one of the preceding claims, wherein the supply components are at least one cable and/or at least one piping for transporting liquid and/or gaseous media.
9. The fixing device (4) according to one of the preceding claims, wherein the square section profile (12) is rigid, in particular made of metal, for example steel.
10. The fixing device (4) according to one of the preceding claims, wherein the metal plate (10) comprises a plurality of ventilation holes (21) configured for allowing access to an inner space (30) of the square section profile (12) from a front side of the metal plate being opposite to the rear side (14).
11 . Method for fixing at least one supply component to a concrete member (2) of a nuclear power plant comprising: welding a square section profile (12) having a rectangular hollow cross section on a rear side (14) of a metal plate (10) intended to extend in parallel to the concrete member (2); embedding the square section profile (12) in the concrete member (2), such that the square section profile (12) is filled with concrete and/or mortar, wherein the square section profile (12) is configured for transmitting, between the metal plate (10) and the concrete member (2), at least one torsional moment applied on the metal plate (10) and forces applied on the metal plate (10) along a direction in parallel to the concrete member (2); and fixing the supply component to the metal plate (10).
12. The method according to claim 11 , wherein the square section profile (12) is arranged such that the rear side (14) of the metal plate (10) is spaced apart from the concrete member (2), such that a space (36) is formed between the rear side (14) of the metal plate (10) and the concrete member (2).
13. Set of a metal plate (10) and a square section profile (12) for forming a fixing device (4) for fixing at least one supply component to a concrete member (2) of a nuclear power plant, the metal plate (10) being adapted to extend in parallel to the concrete member (2), to be fixed to the supply component and having a rear side (14) adapted to face the concrete member (2), the square section profile (12) having a rectangular hollow cross section, the square section profile (12) being adapted to be welded on the rear side (14) of the metal plate (10) and to be embedded in the concrete member (2), such that the square section profile (12) is filled with concrete and/or mortar, the square section profile (12) being configured for transmitting, between the metal plate (10) and the concrete member (2), at least one torsional moment applied on the metal plate (10) and forces applied on the metal plate (10) along a direction in parallel to the concrete member (2).
14. The set according to claim 13, wherein the square section profile (12) and the metal plate (10) are provided to construct a fixing device according to any one of claims 1 to 10.
PCT/EP2020/052501 2020-01-31 2020-01-31 Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device WO2021151512A1 (en)

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PCT/EP2020/052501 WO2021151512A1 (en) 2020-01-31 2020-01-31 Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device

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PCT/EP2020/052501 WO2021151512A1 (en) 2020-01-31 2020-01-31 Fixing device for fixing at least one supply component to a concrete member of a nuclear power plant, related method and set forming such fixing device

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1113115A2 (en) * 1999-12-30 2001-07-04 SCHÖCK BAUTEILE GmbH Sleeve and pin connection of adjacent construction elements
US20180258632A1 (en) 2017-03-08 2018-09-13 Maestro International, Llc Rotating pin locking connector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1113115A2 (en) * 1999-12-30 2001-07-04 SCHÖCK BAUTEILE GmbH Sleeve and pin connection of adjacent construction elements
US20180258632A1 (en) 2017-03-08 2018-09-13 Maestro International, Llc Rotating pin locking connector

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