EP3486375A1 - Anchoring system for a guardrail post - Google Patents
Anchoring system for a guardrail post Download PDFInfo
- Publication number
- EP3486375A1 EP3486375A1 EP18207173.8A EP18207173A EP3486375A1 EP 3486375 A1 EP3486375 A1 EP 3486375A1 EP 18207173 A EP18207173 A EP 18207173A EP 3486375 A1 EP3486375 A1 EP 3486375A1
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- European Patent Office
- Prior art keywords
- anchoring
- post
- rigid support
- anchor plate
- base
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Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0461—Supports, e.g. posts
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
- E01F15/0476—Foundations
Definitions
- the present invention relates to the technical field of safety rails arranged along road traffic routes to reduce the severity of accidents.
- the present invention relates to an anchoring system for a guardrail post.
- a guardrail is a barrier placed along a road lane to, in case of accident, cushion the shock and do not return the vehicle in the opposite direction so that it does not bounce to the left lane on the roads.
- a guardrail as understood throughout this text is a retaining device consisting of vertical elements anchored in the ground, the "posts", and horizontal elements, the "rails" Fixed to these posts. These vertical and horizontal elements generally consist mainly of metal, but any other material having adequate mechanical properties can be envisaged.
- Most of the energy dissipated by a guardrail is generally absorbed by the deformation of the rails, while a more limited amount of energy can also be absorbed by deformation of the posts and their anchoring system. ground.
- the document WO 2015/042656 discloses an anchoring system to a rigid support for a guardrail post in which the force exerted by the post on the anchoring means in case of impact is reduced by the presence of a plate anchor comprising a hinge zone capable of plastically deforming.
- the anchoring plate comprises in fact in its front part (i) an anchoring zone comprising fastening means for coupling said plate to the rigid support and (ii) a zone secured to the base of the column, these two zones being separated by slots extending from the front of the plate towards the rear thereof to the hinge zone.
- the zone secured to the base of the post indeed follows the rotation of the post caused by the moment of force associated with the impact force, while the anchoring zone of the plate remains coupled to the rigid support.
- the deformation thus generated in the hinge zone of the plate makes it possible to dissipate kinetic energy and thus to dampen the impact between the vehicle and the guardrail, but also to reduce the force borne by the coupling anchoring means.
- the anchor plate to the rigid support.
- the anchoring means typically comprising anchor bolts placed in through holes drilled in the anchor plate, are effects biased in tension during the application of a force on the post oriented from front to side. 'back.
- the anchoring system advantageously comprises a stop device, such as a notch at the rear of the post, for limiting the rotation amplitude of the post and therefore of the plastic deformation of the hinge zone. This has the effect of increasing the strength of the guardrail post once the plastic deformation of the hinge area has reached a maximum allowable amplitude.
- anchoring systems comprise an anchor plate secured to the base of the post which is anchored in the ground by means of anchor bolts inserted into through holes drilled in said plate.
- Each anchor bolt is in direct contact with the ground and is closed with a tight nut above the anchor plate.
- a washer including a hole that can be deformed is placed between the anchor bolt lock nut and the anchor plate.
- the hole of the washer deforms and tears under the constraint transmitted to it by the nut of closing.
- the anchor plate and thus the post uncouple from the ground because the closure nut has a size smaller than that of the through holes in the anchor plate.
- the anchor bolts comprising the deformable washers disclosed in the document US2010 / 0293870 are only "fusible" in traction. Therefore, in case of sufficient force exerted on the post, only the front part of the anchor plate is cut off the rigid support. The bolts at the rear of the anchor plate, are in turn subject to compression in case of impact of a vehicle against the guardrail. Since there are no compression fuse bolts in the disclosed anchoring system, the post therefore generally remains partially coupled to the rigid support even after a significant impact between a vehicle and the guardrail. As explained in the document, the absence of total decoupling makes it possible to increase the retention capacity of the guardrail because the partially decoupled post continues to hinder the passage of the vehicle.
- An object of the present invention is to provide an anchoring system in a rigid support for a guardrail post to limit to a threshold value the value of the forces transmitted to the rigid support in order to preserve it, while maximizing the amount of energy dissipated during an impact.
- Another object of the present invention is to provide an anchoring system in a rigid support for a guardrail post which can be implemented in existing civil engineering structures, such as bridges or dykes , without the need for adaptation civil engineering work.
- Another object of the invention is to provide an anchoring system for a guardrail that minimizes the risk of overturning a vehicle colliding with the guardrail.
- Another object of the invention is to provide an anchoring system comprising rigid support anchoring means which can be reused following an impact having caused damage to the post.
- the means for anchoring the at least one anchoring plate to the rigid support are configured to remain in their elastic limit when a moment of force equal to said second threshold value S 2 is applied to the anchoring system.
- the fragile zones of the mechanical coupling between the column base and the at least one anchor plate comprise a partial weld between the column base and the at least one anchor plate.
- the fragile zones of the mechanical coupling between the column base and the at least one anchor plate comprise an area with a thickness less than that of the column base and the anchor plate.
- the system comprises two lateral anchor plates disposed around the column base, said fragile zones being positioned at the interfaces between each lateral anchoring plate and the column base.
- the system according to the invention comprises a central anchoring plate coupled to a column base comprising two lateral parts arranged around said central anchor plate, said fragile zones being positioned at the interfaces between the plate central anchor and each of the two side portions of the post base.
- said slot comprises an edge tangent to the through hole, said edge being in a medial position relative to the through hole and to a fragile zone of the mechanical coupling.
- the means for anchoring the at least one anchor plate to the rigid support comprise anchor bolts, said anchor bolts comprising screws and nuts.
- the bolts comprise washers inserted between the nuts and the at least one anchor plate.
- the invention relates to a kit for assembling an anchoring system to a rigid support as described above comprising a post base, at least one anchor plate mechanically coupled to said post base and means for anchoring the at least one anchor plate to the rigid support.
- the invention relates to a post anchored in a rigid support with the aid of an anchoring system as described above.
- the invention relates to a guardrail anchored in a rigid support comprising a plurality of posts as described above and a plurality of horizontal elements connecting said posts together.
- the post 1 thus comprises a post base 3 coupled to at least one anchor plate 4 by means of a mechanical coupling, said at least one anchor plate 4 being itself coupled to the rigid support 2 by means of anchoring means.
- FIG. 1 and 2 an embodiment of a post 1 compatible with the anchoring system according to the invention is shown.
- two lateral anchor plates 4a, 4b are mechanically coupled to the column base 3 which is in the medial position with respect to the two anchor plates 4a, 4b.
- the side plates 4a, 4b are coupled to the base of the post 3 by welds.
- the side plates 4a, 4b and the column base 3 may be integral parts of the same part.
- the anchoring means to the rigid support 2 of the anchor plate 4 may take different embodiments.
- the anchoring means of the side plates 4a, 4b comprise bolts inserted into through holes 6 drilled in said side plates 4a, 4b. These bolts comprise screws 8 partially embedded in the rigid support 2 to which they are fixed by mechanical and / or chemical means. Nuts 9 are used to close the bolts above the side plates 4a, 4b. Washers 10 may also be inserted between the nuts 9 and the side plates 4a, 4b.
- the pole 1 is also subjected to a force F comprising a component oriented along a direction vector -x2, that is to say oriented from the front face, to the rear face 1b of the pole.
- the side plates 4a, 4b are designed in such a way that the forces due to the force F and transmitted by the column base 3 generate a torsional deformation of the part of the lateral plates 4a, 4b fixed to the base of the pole 3.
- This deformation is the consequence of a greater structural rigidity of the column base 3 relative to that of the side plates 4a, 4b.
- This difference in structural rigidity can origin have the use of materials of different qualities for the side plates 4a, 4b and the base of column 3.
- the side plates 4a, 4b comprise a slot 7, which extends from the front edge to the rear of each side plate 4a, 4b to a certain depth without reaching the rear edge.
- This slot 7 structurally weakens the side plates 4a, 4b which are then more easily deformable in torsion when a moment M is applied to the anchoring system.
- the deformation of the plates 4a, 4b is represented in FIG. Figure 3 .
- Such a deformation is observable when the moment M generated by the force F has a sufficiently high value.
- the mechanical coupling between the plates 4a, 4b and the column base 3 enters plastic deformation.
- This plastic deformation in torsion is responsible for a significant energy dissipation in the anchoring system and thus allows to evacuate part of the kinetic energy of the vehicle, and thus reduce its speed at the time of the impact.
- the threshold value S2 of the moment before rupture which is therefore directly related to the maximum forces transmitted by the anchoring means to the rigid support 2 before rupture, can be modulated according to the mechanical strength properties of the brittle zones 5a, b.
- the fragile zones 5a, 5b are moreover configured so that their rupture causes a total decoupling between the column base 3 and the side plates 4a, 4b.
- these fragile zones 5a, 5b are advantageously located over the entire interface between the column base 3 and the side plates 4a, 4b so that the end of the rupture process, the side plates 4a, 4b and the column base 3 have become separate entities.
- the fragile zones 5a, 5b can be realized in different ways.
- the Figures 1-4 the fragile zones 5a, 5b correspond to a weld between the lateral plates 4a, 4b and the column base 3.
- This weld can be a partial weld, that is to say a weld not extending over the entire thickness of the interface side plates - column base, in order to obtain a suitable threshold value S2 for the moment M.
- the fragile zones 5a, 5b may correspond to areas of smaller thickness relative to the thickness of the side plates 4a, 4b and the column base 3.
- this maximum angle of deflection ⁇ is mainly governed by the torsional structural stiffness of the lateral plates 4a, 4b, which depends on the material used, the thickness of the plates as well as the exact location and the depth of the slot 7.
- the anchoring means of the plates 4a, 4b to the rigid support 2 can withstand the forces generated by the value S2 of the moment M
- the anchoring means which typically comprise anchor bolts, as shown in FIGS. Figures 3-4 , must resist in order for the decoupling to occur at the level of the fragile zones 5.
- the absence of rupture or tearing of the anchoring screws and nuts under the action of the moment of force M equal to S2 makes it possible to guarantee a decoupling total of the pole 1 by breaking the fragile areas 5a, 5b.
- This sufficient resistance of the anchoring means also makes it possible to prevent unpredictable interactions between these and the rigid support 2, which could be deleterious to it.
- the anchoring means which therefore typically comprise anchor bolts, must therefore have strength properties sufficient to withstand the forces they must transmit to the rigid support 2 up to a value S2 of the moment of force.
- the anchoring means are designed and dimensioned to remain in their elastic limit up to the value S2 of the moment of force causing rupture of the fragile zones 5a, 5b. This means that the various elements constituting the anchoring means undergo only elastic deformations, without entering into plasticity therefore, for values of force transmitted during the rupture of the mechanical coupling. In this way, the integrity of the anchoring means is totally preserved at the end of the process of breaking the mechanical coupling between the lateral plates 4a, 4b and the base of the post 3. Consequently, following a destructive accident for the post 1, these anchoring means can be reused to anchor a new post 1 replacing the previous one in the rigid support 2.
- the Figure 5 is a schematic sectional view of the anchoring zone of a post 1 according to one embodiment of the invention.
- the side plates 4a, 4b are thus coupled to the pole base 3 which is in the central position.
- Fragile zones 5a, 5b of the mechanical coupling are located at the interfaces between the column base 3 and the side plates 4a, 4b.
- the fragile zones 5a, 5b are welds, possibly partial, between the lateral plates 4a, 4b and the column base 3.
- the lateral plates 4a, 4b and the column base 3 are integral parts of the same room it can be an area with a reduced thickness.
- the parts 31 and 32 represent the front and rear walls of the post 1 which are anchored on its base 3.
- the Figure 6 is a schematic sectional view of the anchoring zone of a pole 1 according to another embodiment.
- the side plates 4a, 4b are replaced by a single central plate 4 coupled to a column base in two side portions 3a and 3b.
- a fragile zone 5a, 5b is located at each interface between the two-part post base 3a, 3b and the central plate 4.
- the central plate 4 advantageously comprises two through holes 6 to receive the anchoring means to the rigid support 2.
- Embodiments with a single through-hole in the central plate 4 may also be envisaged.
- the portions 31a, 32a and 31b, 32b represent the front and rear walls of the post 1 which are anchored to the side portions 3a and 3b of the post base. What has been said above about the embodiments comprising a central post base 3 and lateral anchor plates 4a, 4b is directly transferable this embodiment comprising a single central anchoring plate 4 and a base of post in two lateral parts 3a and 3b.
- At least one slot 7 is advantageously machined in the anchor plates 4, 4a, 4b.
- This slot is advantageously through an axis x3, through the thickness of the plate so, and it extends along an axis x2, the front edge of the plate to a certain depth towards the rear, without reaching the back edge.
- This slot 7 reduces the structural rigidity of the plate in torsion.
- the slot 7 is advantageously connected to the through hole 6 used to anchor the plate to the rigid support 2.
- the presence of the slot 7 connected to the through hole provides an additional possibility of obtaining a decoupling between the post 1 and the rigid support 2.
- the plates 4, 4a, 4b can indeed deform so as to widen the width of the slot 7 and allow the passage of the anchor screw 8 therethrough.
- the decoupling between the post 1 and the rigid substrate 2 is then obtained by a translational movement along the x2 axis of the post base 3 still coupled to the anchor plates 4, 4a, 4b.
- each slot 7 connected to a through hole 6 of an anchor plate 4, 4a, 4b advantageously comprises an edge 7a, 7b extending along an axis 11a, 11b parallel to x2 and tangent to the through hole 6.
- the axis 11a, 11b is in the medial position relative to the fragile zone 5a, 5b of the mechanical coupling and the through hole 6.
- medial position it is meant that the axis 11a, 11b, in addition to being tangent to the through hole 6, is located between the through hole 6 and the fragile zone 5a, 5b.
- the edge 7a, 7b of the slot 7 extends along an axis 11 which is parallel to x2 and tangential to the hole 6 on the side of the fragile zone 5a, 5b.
- the slot 7, generally narrower than the through hole 6, is connected to the through hole 6 while being shifted towards the fragile zone 5a, 5b with respect to the center of the through hole 6.
- This configuration for the anchoring plates 4, 4a 4b has proved particularly advantageous.
- the Figure 7 represents a guardrail comprising posts 1 anchored to a rigid support 2, which is here a sill concrete or metal, using an anchoring system as described above. Horizontal elements, the tubes 12 connect between them different posts 1.
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Abstract
Système d'ancrage pour un poteau (1) de glissière de sécurité dans un support rigide (2), ledit poteau comprenant une face avant (1a) et une face arrière (1b), ledit système comprenant : -une base de poteau (3) ; - une platine d'ancrage (4, 4a, 4b) au support rigide (2) ; -des moyens d'ancrage (8, 9, 10) de la platine d'ancrage (4, 4a, 4b) au support rigide (2) ; dans lequel ladite base de poteau (3) est couplée mécaniquement à ladite platine d'ancrage (4, 4a, 4b) par un couplage mécanique, ledit couplage mécanique étant un couplage rigide déformable en rotation sous l'action d'une force F appliquée sur le poteau (1) ayant une composante horizontale orientée de l'avant vers l'arrière du poteau, ledit couplage mécanique entrant en déformation plastique lorsque ladite composante horizontale génère un moment de force M supérieur à une première valeur seuil SI sur le système d'ancrage.Anchoring system for a post (1) of a guardrail in a rigid support (2), said post comprising a front face (1a) and a rear face (1b), said system comprising: a post base (3); - An anchor plate (4, 4a, 4b) to the rigid support (2); anchoring means (8, 9, 10) of the anchoring plate (4, 4a, 4b) to the rigid support (2); wherein said post base (3) is mechanically coupled to said anchor plate (4, 4a, 4b) by mechanical coupling, said mechanical coupling being a rigid coupling deformable in rotation under the action of an applied force F on the post (1) having a horizontal component oriented from the front to the back of the post, said mechanical coupling becoming plastic deformation when said horizontal component generates a moment of force M greater than a first threshold value SI on the system of anchor.
Description
La présente invention se rapporte au domaine technique des glissières de sécurité disposées le long des voies de circulation routières pour amoindrir la gravité de accidents.The present invention relates to the technical field of safety rails arranged along road traffic routes to reduce the severity of accidents.
La présente invention concerne un système d'ancrage pour un poteau de glissière de sécurité.The present invention relates to an anchoring system for a guardrail post.
Une glissière de sécurité est une barrière disposée le long d'une voie de circulation routière pour, en cas d'accident, amortir le choc et ne pas renvoyer le véhicule dans le sens inverse afin qu'il ne rebondisse pas vers la voie de gauche sur les routes. Pour atteindre ces objectifs, il est avantageux de concevoir les glissières de sécurité de telle manière qu'elles puissent se déformer lorsqu'elles sont percutées un véhicule en vue d'absorber l'énergie cinétique de ce dernier. Lors d'une collision avec un véhicule, l'énergie peut alors être absorbée à différents endroits de la glissière de sécurité. De manière générale, une glissière de sécurité telle qu'on l'entend tout au long de ce texte est un dispositif de retenue constitué d'éléments verticaux ancrés dans le sol, les «poteaux», et d'éléments horizontaux, les «rails», fixés à ces poteaux. Ces éléments verticaux et horizontaux sont en général constitués principalement de métal, mais tout autre matériau ayant des propriétés mécaniques adéquates peut être envisagé. Par convention, tout au long de ce texte, on désigne par « face avant » d'un poteau, la face du poteau, ou de l'un des éléments qui le composent, jouxtant la voie de circulation et se retrouvant en général en première ligne en cas d'impact avec un véhicule, tandis que la « face arrière » est la face opposée à la face avant. La majeure partie de l'énergie dissipée par une glissière de sécurité est en général absorbée par la déformation des rails, tandis qu'une quantité d'énergie plus limitée peut également être absorbée par une déformation des poteaux et de leur système d'ancrage au sol.A guardrail is a barrier placed along a road lane to, in case of accident, cushion the shock and do not return the vehicle in the opposite direction so that it does not bounce to the left lane on the roads. To achieve these objectives, it is advantageous to design the guardrails in such a way that they can deform when they are struck by a vehicle in order to absorb the kinetic energy of the latter. In a collision with a vehicle, the energy can then be absorbed at different points of the guardrail. In general, a guardrail as understood throughout this text is a retaining device consisting of vertical elements anchored in the ground, the "posts", and horizontal elements, the "rails" Fixed to these posts. These vertical and horizontal elements generally consist mainly of metal, but any other material having adequate mechanical properties can be envisaged. By convention, throughout this text, the term "front face" of a post, the face of the post, or one of the elements that compose it, adjacent to the lane and usually found in the first line in case of impact with a vehicle, while the "rear face" is the opposite side to the front. Most of the energy dissipated by a guardrail is generally absorbed by the deformation of the rails, while a more limited amount of energy can also be absorbed by deformation of the posts and their anchoring system. ground.
Le document
Cependant, lorsque la glissière de sécurité est placée sur un ouvrage d'art de génie civil tel qu'un pont ou une digue, il est en général très souhaitable de limiter à une valeur maximale les efforts transmis par les moyens d'ancrage au support rigide en vue de préserver ce dernier. Dans un tel cas de figure, le support rigide fait en effet en général partie d'une structure complexe de génie civil. Il est alors couteux et difficile à réparer en cas d'endommagement généré par des efforts excessifs au niveau des moyens d'ancrage. En vue de limiter les efforts transmis au support rigide via les moyens d'ancrage, des systèmes dits « à fusible » existent, dans lesquels le poteau se découple du support rigide au-delà d'une valeur seuil d'efforts transmis aux moyens d'ancrage. De tels systèmes pour maitriser la valeur maximale des efforts transmis au support rigide sont par exemple décrits dans le document
Par ailleurs, les boulons d'ancrage comprenant les rondelles déformables divulgués dans le document
Un but de la présente invention est de fournir un système d'ancrage dans un support rigide pour un poteau de glissière de sécurité permettant de limiter à une valeur seuil la valeur des efforts transmis au support rigide en vue de le préserver, tout en maximisant la quantité d'énergie dissipée lors d'un impact.An object of the present invention is to provide an anchoring system in a rigid support for a guardrail post to limit to a threshold value the value of the forces transmitted to the rigid support in order to preserve it, while maximizing the amount of energy dissipated during an impact.
Un autre but de la présente invention est de fournir un système d'ancrage dans un support rigide pour un poteau de glissière de sécurité qui peut être mis en oeuvre dans des ouvrages d'art de génie civil existants, tels que des ponts ou des digues, sans nécessiter de travaux de génie civil d'adaptation.Another object of the present invention is to provide an anchoring system in a rigid support for a guardrail post which can be implemented in existing civil engineering structures, such as bridges or dykes , without the need for adaptation civil engineering work.
Un autre but de l'invention est de fournir un système d'ancrage pour une glissière de sécurité qui minimise les risques de renversement d'un véhicule entrant en collision avec la glissière de sécurité.Another object of the invention is to provide an anchoring system for a guardrail that minimizes the risk of overturning a vehicle colliding with the guardrail.
Un autre but de l'invention est de fournir un système d'ancrage comprenant des moyens d'ancrage au support rigide qui peuvent être réutilisés suite à un impact ayant provoqué un endommagement du poteau.Another object of the invention is to provide an anchoring system comprising rigid support anchoring means which can be reused following an impact having caused damage to the post.
La présente invention est définie dans la revendication indépendante annexée. Les modes de réalisations préférés sont définis dans les revendications dépendentes.The present invention is defined in the appended independent claim. Preferred embodiments are defined in the dependent claims.
Selon un premier aspect, l'invention se rapporte à un système d'ancrage pour un poteau de glissière de sécurité dans un support rigide, ledit poteau comprenant une face avant et une face arrière, ledit système comprenant :
- une base de poteau ;
- au moins une platine d'ancrage au support rigide ;
- des moyens d'ancrage de la au moins une platine d'ancrage au support rigide ; dans lequel ladite base de poteau est couplée mécaniquement à ladite au moins une platine d'ancrage par un couplage mécanique, ledit couplage mécanique étant un couplage rigide déformable en rotation sous l'action d'une force F appliquée sur le poteau ayant une composante horizontale orientée de l'avant vers l'arrière du poteau, ledit couplage mécanique entrant en déformation plastique lorsque ladite composante horizontale génère un moment de force M supérieur à une première valeur seuil S1 sur le système d'ancrage,
dans lequel,- ledit couplage mécanique est configuré pour entrer en rupture par torsion dans des zones fragiles du couplage mécanique lorsque ladite composante horizontale de la force appliquée génère un moment de force supérieur à une seconde valeur seuil S2 sur le système d'ancrage, lesdites zones fragiles étant configurées pour que la base du poteau soit totalement découplée de la au moins une platine d'ancrage après la rupture des zones fragiles, lesdits moyens d'ancrage de la au moins une platine d'ancrage au support rigide étant configurés pour résister à un moment de force égal à ladite seconde valeur seuil S2 ;
- la au moins une platine d'ancrage comprend une fente traversante s'étendant de l'avant vers l'arrière de ladite au moins une platine d'ancrage jusqu'à une certaine profondeur sans en atteindre le bord arrière ;
- la au moins une platine d'ancrage comprend au moins un trou traversant pour recevoir les moyens d'ancrage au support rigide, ledit trou traversant étant connecté à ladite fente.
- a pole base;
- at least one anchor plate to the rigid support;
- means for anchoring the at least one anchor plate to the rigid support; wherein said post base is mechanically coupled to said at least one anchor plate by a mechanical coupling, said mechanical coupling being a rigid coupling deformable in rotation under the action of a force F applied to the post having a horizontal component oriented from the front to the rear of the post, said mechanical coupling entering plastic deformation when said horizontal component generates a moment of force M greater than a first threshold value S1 on the anchoring system,
in which,- said mechanical coupling is configured to torsionally rupture in fragile areas of the mechanical coupling when said horizontal component of the applied force generates a moment of force greater than a second threshold value S2 on the anchoring system, said fragile zones being configured so that the base of the post is completely decoupled from the at least one anchor plate after the rupture of the fragile areas, said means for anchoring the at least one anchor plate to the rigid support being configured to resist a moment of force equal to said second threshold value S2;
- the at least one anchor plate comprises a through slot extending from the front to the rear of said at least one anchor plate to a certain depth without reaching the rear edge;
- the at least one anchor plate comprises at least one through hole for receiving the anchoring means to the rigid support, said through hole being connected to said slot.
Selon un mode de réalisation avantageux, les moyens d'ancrage de la au moins une platine d'ancrage au support rigide sont configurés pour rester dans leur limite d'élasticité lorsqu'un moment de force égal à ladite seconde valeur seuil S2 est appliqué sur le système d'ancrage.According to an advantageous embodiment, the means for anchoring the at least one anchoring plate to the rigid support are configured to remain in their elastic limit when a moment of force equal to said second
Selon un mode de réalisation avantageux, les zones fragiles du couplage mécanique entre la base de poteau et la au moins une platine d'ancrage comprennent une soudure partielle entre la base de poteau et la au moins une platine d'ancrage.According to an advantageous embodiment, the fragile zones of the mechanical coupling between the column base and the at least one anchor plate comprise a partial weld between the column base and the at least one anchor plate.
Selon un mode de réalisation avantageux, les zones fragiles du couplage mécanique entre la base de poteau et la au moins une platine d'ancrage comprennent une zone avec une épaisseur inférieure à celle de la base de poteau et de la platine d'ancrage.According to an advantageous embodiment, the fragile zones of the mechanical coupling between the column base and the at least one anchor plate comprise an area with a thickness less than that of the column base and the anchor plate.
Selon un mode de réalisation avantageux, le système comprend deux platines d'ancrage latérales disposées autour de la base de poteau, lesdites zones fragiles étant positionnées aux interfaces entre chaque platine d'ancrage latérale et la base de poteau.According to an advantageous embodiment, the system comprises two lateral anchor plates disposed around the column base, said fragile zones being positioned at the interfaces between each lateral anchoring plate and the column base.
Selon un mode de réalisation avantageux, le système selon l'invention comprend une platine d'ancrage centrale couplée à une base de poteau comprenant deux parties latérales disposées autour de ladite platine d'ancrage centrale, lesdites zones fragiles étant positionnées aux interfaces entre la platine d'ancrage centrale et chacune des deux parties latérales de la base de poteau.According to an advantageous embodiment, the system according to the invention comprises a central anchoring plate coupled to a column base comprising two lateral parts arranged around said central anchor plate, said fragile zones being positioned at the interfaces between the plate central anchor and each of the two side portions of the post base.
Selon un mode de réalisation avantageux, ladite fente comprend un bord tangent au trou traversant, ledit bord étant en position médiale par rapport au trou traversant et à une zone fragile du couplage mécanique.According to an advantageous embodiment, said slot comprises an edge tangent to the through hole, said edge being in a medial position relative to the through hole and to a fragile zone of the mechanical coupling.
Selon un mode de réalisation avantageux, les moyens d'ancrage de la au moins une platine d'ancrage au support rigide comprennent des boulons d'ancrage, lesdits boulons d'ancrage comprenant des vis et des écrous.According to an advantageous embodiment, the means for anchoring the at least one anchor plate to the rigid support comprise anchor bolts, said anchor bolts comprising screws and nuts.
Selon un mode de réalisation avantageux, les boulons comprennent des rondelles insérées entre les écrous et la au moins une platine d'ancrage.According to an advantageous embodiment, the bolts comprise washers inserted between the nuts and the at least one anchor plate.
Selon un second aspect, l'invention se rapporte à un kit pour l'assemblage d'un système d'ancrage à un support rigide tel que décrit ci-dessus comprenant une base de poteau, au moins une platine d'ancrage couplée mécaniquement à ladite base de poteau et des moyens d'ancrage de la au moins une platine d'ancrage au support rigide.According to a second aspect, the invention relates to a kit for assembling an anchoring system to a rigid support as described above comprising a post base, at least one anchor plate mechanically coupled to said post base and means for anchoring the at least one anchor plate to the rigid support.
Selon un troisième aspect, l'invention se rapporte à un poteau ancré dans un support rigide à l'aide d'un système d'ancrage tel que décrit ci-dessus.According to a third aspect, the invention relates to a post anchored in a rigid support with the aid of an anchoring system as described above.
Selon un quatrième aspect, l'invention se rapporte à une glissière de sécurité ancrée dans un support rigide comprenant une pluralité de poteaux tels que décrits ci-dessus et une pluralité d'éléments horizontaux reliant lesdits poteaux entre eux.According to a fourth aspect, the invention relates to a guardrail anchored in a rigid support comprising a plurality of posts as described above and a plurality of horizontal elements connecting said posts together.
Ces aspects de l'invention et d'autres aspects complémentaires seront expliqués plus en détails au moyen d'exemples et par référence au dessin annexé :
- La
Figure 1 représente un mode de réalisation d'un poteau comprenant une base de poteau et des platines d'ancrage selon un mode de réalisation de l'invention ; - La
Figure 2 est un agrandissement de la zone d'ancrage du poteau représenté à laFigure 1 ; - La
Figure 3 représente un mode de réalisation du système d'ancrage selon l'invention comprenant le poteau représenté auxFigures 1 &2 sur lequel est appliqué une force d'impact F, juste avant la que la rupture se produise ; - La
Figure 4 représente le système d'ancrage représenté à laFigure 3 dans lequel la force d'impact F a provoqué la rupture du couplage entre la base de poteau et les platines d'ancrage ; - La
Figure 5 représente une vue en coupe schématique de la zone d'ancrage du poteau desFigures 1 &2 ; - La
Figure 6 représente une vue en coupe schématique de la zone d'ancrage d'un poteau dans un autre mode de réalisation du système d'ancrage selon l'invention ; - La
Figure 7 représente une glissière de sécurité comprenant des systèmes d'ancrage selon l'invention ;
- The
Figure 1 represents an embodiment of a post comprising a post base and anchor plates according to an embodiment of the invention; - The
Figure 2 is an enlargement of the anchorage area of the post shown inFigure 1 ; - The
Figure 3 represents an embodiment of the anchoring system according to the invention comprising the pole shown inFigures 1 & 2 on which an impact force F is applied, just before the break occurs; - The
Figure 4 represents the anchoring system shown inFigure 3 wherein the impact force F has caused the coupling between the post base and the anchor plates to break; - The
Figure 5 represents a schematic sectional view of the anchoring zone of the column ofFigures 1 &2; - The
Figure 6 is a schematic sectional view of the anchoring zone of a pole in another embodiment of the anchoring system according to the invention; - The
Figure 7 represents a guardrail comprising anchoring systems according to the invention;
L'invention se rapporte donc à un système d'ancrage pour un poteau 1 de glissière de sécurité dans un support rigide 2, ledit poteau 1 comprenant une face avant la et une face arrière 1b, ledit système d'ancrage comprenant :
- une base de poteau 3 ;
- au moins une platine d'ancrage 4
au support rigide 2 ; - des moyens d'ancrage de la au moins une platine d'ancrage 4
au support rigide 2 ;
dans lequel ledit couplage mécanique est configuré pour entrer en rupture par torsion dans des zones fragiles 5a, 5b du couplage mécanique lorsque ladite composante horizontale de la force appliquée génère un moment de force supérieur à une seconde valeur seuil S2 sur le système d'ancrage, lesdites zones fragiles 5a, 5b étant configurées pour que la base du poteau 3 soit totalement découplée de la au moins une platine d'ancrage après la rupture des zones fragiles 5a, 5b, lesdits moyens d'ancrage de la au moins une platine d'ancrage 4
- a
post base 3; - at least one anchor plate 4 to the
rigid support 2; - means for anchoring the at least one anchoring plate 4 to the
rigid support 2;
wherein said mechanical coupling is configured to torsionally rupture in
Dans le système d'ancrage selon l'invention, le poteau 1 comprend donc une base de poteau 3 couplée à au moins une platine d'ancrage 4 à l'aide d'un couplage mécanique, ladite au moins une platine d'ancrage 4 étant elle-même couplée au support rigide 2 à l'aide de moyens d'ancrage.In the anchoring system according to the invention, the
Aux
Les moyens d'ancrage au support rigide 2 de la platine d'ancrage 4 peuvent revêtir différents modes de réalisation. A la
A la
Cette force génère donc un moment M selon un axe x1 sur le système d'ancrage, et provoque donc la déformation en rotation du couplage mécanique entre les platines latérales 4a, 4b et la base de poteau 3. Dans le mode de réalisation représenté à la
La déformation des platines 4a, 4b est représentée à la
Si la collision entre le véhicule et la glissière de sécurité est telle que la force F engendre un moment M ayant une valeur supérieure à une valeur seuil S2 sur le système d'ancrage, le couplage mécanique entre les platines latérales 4a, 4b et la base de poteau entre une rupture dans des zones fragiles 5a, 5b dudit couplage mécanique. Cette rupture par torsion se produit lorsque la déformation plastique en torsion dans les platines latérales 4a, 4b atteint un certain de niveau au-delà duquel la contrainte pour continuer à déformer plastiquement les platines latérales 4a, 4b devient trop élevée à supporter pour les zones fragiles 5a, 5b, qui entrent alors en rupture. Cette rupture permet donc de limiter les efforts transmis par les moyens d'ancrage des platines latérales 4a, 4b au support rigide 2 à une valeur maximale. De cette manière, le support rigide 2 est préservé des endommagements qui peuvent survenir en cas d'efforts excessifs générés par les moyens d'ancrage des platines latérales 4a, 4b. La valeur seuil S2 du moment avant rupture, qui est donc directement liée aux efforts maximaux transmis par les moyens d'ancrage au support rigide 2 avant rupture, peut être modulée suivant les propriétés de résistance mécanique à la rupture des zones fragiles 5a, b. Les zones fragiles 5a, 5b sont par ailleurs configurées pour que leur rupture provoque un découplage total entre la base de poteau 3 et les platines latérales 4a, 4b. Ainsi, ces zones fragiles 5a, 5b sont avantageusement localisées sur l'ensemble de l'interface entre la base de poteau 3 et les platines latérales 4a, 4b de manière à ce que l'issue du processus de rupture, les platines latérales 4a, 4b et la base de poteau 3 soient devenues des entités distinctes.Ces zones fragiles 5a, 5b peuvent être réalisées de différentes manières. Aux
Cette rupture aboutit à un découplage total entre les platines latérales 4a, 4b et la base de poteau 3. Le poteau est donc totalement désolidarisé du support rigide 2 à l'issue du processus de rupture. Un tel découplage total, représenté à la
En vue d'atteindre cette rupture du couplage mécanique bien nette dans les zones fragiles 5a, 5b, il est important que les moyens d'ancrage des platines 4a, 4b au support rigide 2 puissent supporter les efforts générés par la valeur S2 du moment M. En effet, les moyens d'ancrage, qui comprennent typiquement des boulons d'ancrage, tels que représentés aux
La
La
Comme discuté plus haut, au moins une fente 7 est avantageusement usinée dans les platines d'ancrage 4, 4a, 4b. Cette fente est avantageusement traversante selon un axe x3, à travers l'épaisseur de la platine donc, et elle s'étend selon un axe x2, du bord avant de la platine jusqu'à une certaine profondeur vers l'arrière, sans atteindre le bord arrière. Cette fente 7 permet de réduire la rigidité structurale de la platine en torsion. Comme représenté aux
Aux
La
Claims (12)
caractérisé en ce que
characterized in that
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2017/5848A BE1025272B1 (en) | 2017-11-20 | 2017-11-20 | ANCHORING SYSTEM FOR A SECURITY SLIDE POST |
Publications (2)
Publication Number | Publication Date |
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EP3486375A1 true EP3486375A1 (en) | 2019-05-22 |
EP3486375B1 EP3486375B1 (en) | 2021-03-03 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP18207173.8A Active EP3486375B1 (en) | 2017-11-20 | 2018-11-20 | Anchoring system for a guardrail post |
Country Status (3)
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EP (1) | EP3486375B1 (en) |
BE (1) | BE1025272B1 (en) |
ES (1) | ES2875771T3 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021080441A1 (en) * | 2019-10-22 | 2021-04-29 | Holmes Solutions Limited Partnership | A mounting element |
CN115354605A (en) * | 2021-09-30 | 2022-11-18 | 山东奥邦机械设备制造有限公司 | Guardrail guiding device and using method |
EP4234815A1 (en) | 2022-02-23 | 2023-08-30 | Van Eycken Metal Construction BV | Anchoring system for a metal vehicle deflection structure and a construction made up of these |
BE1030292A1 (en) | 2022-02-23 | 2023-09-14 | Van Eycken Metal Construction Bvba | ANCHOR SYSTEM WITH REDUCED FORCE TRANSMISSION FOR A METAL VEHICLE-RETAINING CONSTRUCTION AND A STRUCTURE COMPOSED WITH IT |
BE1030291A1 (en) | 2022-02-23 | 2023-09-14 | Van Eycken Metal Construction Bvba | ANCHOR SYSTEM INCLUDING A SUPPORT FOOT FOR A METAL VEHICLE-RETAINING CONSTRUCTION AND A STRUCTURE COMPOSED THEREWITH |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115323961B (en) * | 2022-07-11 | 2024-03-19 | 泉州装备制造研究所 | Road safety guard rail |
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DE1784758B1 (en) * | 1968-09-14 | 1972-08-03 | A.Neher Maschinenfabrik,Stahl-U.Apparatebau Gmbh | guardrail |
JP2010180577A (en) * | 2009-02-04 | 2010-08-19 | Sekisui Jushi Co Ltd | Guard fence |
US20100293870A1 (en) | 2007-10-01 | 2010-11-25 | Hierros Y Aplanaciones, S.A., | System Of Direct Fusible Anchoring For A Support Post Of A Security Barrier Or Parapet In Rigid Ground |
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WO2015042656A1 (en) | 2013-09-30 | 2015-04-02 | Safe Direction Pty Ltd | Post assembly |
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- 2017-11-20 BE BE2017/5848A patent/BE1025272B1/en active IP Right Grant
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2018
- 2018-11-20 ES ES18207173T patent/ES2875771T3/en active Active
- 2018-11-20 EP EP18207173.8A patent/EP3486375B1/en active Active
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DE1784758B1 (en) * | 1968-09-14 | 1972-08-03 | A.Neher Maschinenfabrik,Stahl-U.Apparatebau Gmbh | guardrail |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2021080441A1 (en) * | 2019-10-22 | 2021-04-29 | Holmes Solutions Limited Partnership | A mounting element |
CN115354605A (en) * | 2021-09-30 | 2022-11-18 | 山东奥邦机械设备制造有限公司 | Guardrail guiding device and using method |
EP4234815A1 (en) | 2022-02-23 | 2023-08-30 | Van Eycken Metal Construction BV | Anchoring system for a metal vehicle deflection structure and a construction made up of these |
BE1030292A1 (en) | 2022-02-23 | 2023-09-14 | Van Eycken Metal Construction Bvba | ANCHOR SYSTEM WITH REDUCED FORCE TRANSMISSION FOR A METAL VEHICLE-RETAINING CONSTRUCTION AND A STRUCTURE COMPOSED WITH IT |
BE1030291A1 (en) | 2022-02-23 | 2023-09-14 | Van Eycken Metal Construction Bvba | ANCHOR SYSTEM INCLUDING A SUPPORT FOOT FOR A METAL VEHICLE-RETAINING CONSTRUCTION AND A STRUCTURE COMPOSED THEREWITH |
BE1030292B1 (en) * | 2022-02-23 | 2023-09-19 | Van Eycken Metal Construction Bvba | ANCHOR SYSTEM WITH REDUCED FORCE TRANSMISSION FOR A METAL VEHICLE-RETAINING CONSTRUCTION AND A STRUCTURE COMPOSED WITH IT |
Also Published As
Publication number | Publication date |
---|---|
BE1025272B1 (en) | 2019-01-03 |
ES2875771T3 (en) | 2021-11-11 |
EP3486375B1 (en) | 2021-03-03 |
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