EP3486375A1 - Verankerungssystem für einen pfosten eines leitplankensystems - Google Patents

Verankerungssystem für einen pfosten eines leitplankensystems Download PDF

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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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EP
European Patent Office
Prior art keywords
anchoring
post
rigid support
anchor plate
base
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP18207173.8A
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English (en)
French (fr)
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EP3486375B1 (de
Inventor
David De Saedeleer
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Desami Sprl
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Desami Sprl
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Publication of EP3486375A1 publication Critical patent/EP3486375A1/de
Application granted granted Critical
Publication of EP3486375B1 publication Critical patent/EP3486375B1/de
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Classifications

    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP18207173.8A 2017-11-20 2018-11-20 Verankerungssystem für einen pfosten eines leitplankensystems Active EP3486375B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2017/5848A BE1025272B1 (fr) 2017-11-20 2017-11-20 Système d'ancrage pour un poteau de glissière de sécurité

Publications (2)

Publication Number Publication Date
EP3486375A1 true EP3486375A1 (de) 2019-05-22
EP3486375B1 EP3486375B1 (de) 2021-03-03

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Family Applications (1)

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EP18207173.8A Active EP3486375B1 (de) 2017-11-20 2018-11-20 Verankerungssystem für einen pfosten eines leitplankensystems

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EP (1) EP3486375B1 (de)
BE (1) BE1025272B1 (de)
ES (1) ES2875771T3 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021080441A1 (en) * 2019-10-22 2021-04-29 Holmes Solutions Limited Partnership A mounting element
CN115354605A (zh) * 2021-09-30 2022-11-18 山东奥邦机械设备制造有限公司 一种护栏导向装置及使用方法
EP4234815A1 (de) 2022-02-23 2023-08-30 Van Eycken Metal Construction BV Verankerungssystem für eine metallische fahrzeugablenkstruktur und daraus hergestellte konstruktion
BE1030291A1 (nl) 2022-02-23 2023-09-14 Van Eycken Metal Construction Bvba Verankeringssysteem omvattende een steunvoet voor een metalen voertuigkerende constructie en een constructie hiermee samengesteld
BE1030292A1 (nl) 2022-02-23 2023-09-14 Van Eycken Metal Construction Bvba Verankeringssysteem met verlaagde krachtoverdracht voor een metalen voertuigkerende constructie en een constructie hiermee samengesteld

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115323961B (zh) * 2022-07-11 2024-03-19 泉州装备制造研究所 一种道路安全防护栏

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1784758B1 (de) * 1968-09-14 1972-08-03 A.Neher Maschinenfabrik,Stahl-U.Apparatebau Gmbh leitplanke
JP2010180577A (ja) * 2009-02-04 2010-08-19 Sekisui Jushi Co Ltd 防護柵
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
US20110095250A1 (en) * 2009-10-27 2011-04-28 Barrier Systems, Inc. Vehicle crash attenuator apparatus
WO2015042656A1 (en) 2013-09-30 2015-04-02 Safe Direction Pty Ltd Post assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1784758B1 (de) * 1968-09-14 1972-08-03 A.Neher Maschinenfabrik,Stahl-U.Apparatebau Gmbh leitplanke
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
JP2010180577A (ja) * 2009-02-04 2010-08-19 Sekisui Jushi Co Ltd 防護柵
US20110095250A1 (en) * 2009-10-27 2011-04-28 Barrier Systems, Inc. Vehicle crash attenuator apparatus
WO2015042656A1 (en) 2013-09-30 2015-04-02 Safe Direction Pty Ltd Post assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021080441A1 (en) * 2019-10-22 2021-04-29 Holmes Solutions Limited Partnership A mounting element
CN115354605A (zh) * 2021-09-30 2022-11-18 山东奥邦机械设备制造有限公司 一种护栏导向装置及使用方法
EP4234815A1 (de) 2022-02-23 2023-08-30 Van Eycken Metal Construction BV Verankerungssystem für eine metallische fahrzeugablenkstruktur und daraus hergestellte konstruktion
BE1030291A1 (nl) 2022-02-23 2023-09-14 Van Eycken Metal Construction Bvba Verankeringssysteem omvattende een steunvoet voor een metalen voertuigkerende constructie en een constructie hiermee samengesteld
BE1030292A1 (nl) 2022-02-23 2023-09-14 Van Eycken Metal Construction Bvba Verankeringssysteem met verlaagde krachtoverdracht voor een metalen voertuigkerende constructie en een constructie hiermee samengesteld
BE1030292B1 (nl) * 2022-02-23 2023-09-19 Van Eycken Metal Construction Bvba Verankeringssysteem met verlaagde krachtoverdracht voor een metalen voertuigkerende constructie en een constructie hiermee samengesteld

Also Published As

Publication number Publication date
EP3486375B1 (de) 2021-03-03
BE1025272B1 (fr) 2019-01-03
ES2875771T3 (es) 2021-11-11

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