EP2554749B1 - Highway guardrail with joint and stiffener system - Google Patents

Highway guardrail with joint and stiffener system Download PDF

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Publication number
EP2554749B1
EP2554749B1 EP12177593.6A EP12177593A EP2554749B1 EP 2554749 B1 EP2554749 B1 EP 2554749B1 EP 12177593 A EP12177593 A EP 12177593A EP 2554749 B1 EP2554749 B1 EP 2554749B1
Authority
EP
European Patent Office
Prior art keywords
rail
stiffener
joint
guardrail
joint part
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.)
Active
Application number
EP12177593.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2554749A3 (en
EP2554749A2 (en
Inventor
Hannu Vesamäki
Vesa Järvinen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rautaruukki Oyj
Original Assignee
Rautaruukki Oyj
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Publication date
Application filed by Rautaruukki Oyj filed Critical Rautaruukki Oyj
Publication of EP2554749A2 publication Critical patent/EP2554749A2/en
Publication of EP2554749A3 publication Critical patent/EP2554749A3/en
Application granted granted Critical
Publication of EP2554749B1 publication Critical patent/EP2554749B1/en
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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
    • E01F15/0407—Metal rails
    • E01F15/0423—Details of rails

Definitions

  • the object of the present invention is a joint and stiffener system for a highway guardrail, which highway guardrail is composed of essentially vertical guardrail pillars installed at a distance from one another and of essentially horizontal rails fixed to them, which rails are open profiles, the open part of which is directed towards the guardrail pillar, and which joint and stiffener system comprises a joint part/stiffener part.
  • the invention relates generally to highway guardrails and more particularly to the center guardrails of traffic lanes, which have recently become rapidly more widespread. They are used for safety reasons to prevent head-on accidents of vehicles moving in opposite directions. By means of center guardrails, of course, overtaking can be prevented in places where it would be dangerous. Center guardrails have become widely adopted, particularly on highways with an overtaking lane.
  • Center guardrails are composed of essentially vertical metallic guardrail pillars that are embedded and/or fixed into the ground at a distance from each other, as well as of metallic guides, i.e. essentially horizontal guardrail parts, fixed to them.
  • the terms "vertical” and “horizontal” are not, of course, mathematically precise in this context, because they vary according to the profile of the ground surface on the highway.
  • the critical points are the point of connection between the guardrail pillar and the rail and also the point of connection between two rails.
  • a joint part comprising a number of parts is used between the guardrail pillar and the rail (e.g. EP 1947245 A1 ) as well as oval perforations in the rail/joint part, said perforations allowing small tolerances.
  • stiffener rods fabricated from L-shaped steel bars, said rods to be fastened to the bottom edge of the rail by welding, are often used as a stiffener. It is also typical that completely different types of parts are used as a stiffener, as a fastener of the guardrail pillar and as a splice of a rail.
  • WO 03104568 presents a solution wherein the rail of a guardrail is formed from a C-shaped beam. At the point of connection the beam is tapered and it is installed inside the next rail and locked with bolts and nuts. This publication does not disclose in more detail how the guardrail pillars and the rails are fastened to each other.
  • WO 9842918 presents a highway guardrail wherein the rails are also open profiles. They are joined together with a joint piece of essentially the same cross-sectional shape and of slightly smaller dimensions, on top of which joint piece the rails to be connected are installed, and which joint piece is also an open profile. Thus a joint piece is used here only in a splice joint between two rails.
  • KR101052243B1 relates to a multi-stage shock absorption guide rail.
  • a rail of rectangular pipe shape is connected to a post.
  • a protrusion and an opening are formed on the front and rear sides of the rail.
  • Reinforcing ribs are formed on both upper and lower sides of the opening.
  • a short support pipe of rectangular pipe shape is inserted in the rail.
  • a bracket includes a support panel which is attached to the rear side of the rail and a fixing panel which is welded to the post.
  • DE20113347U1 relates to a modular steel crash barrier in which sections may be attached to each other with pins.
  • DE102006038336B3 discloses an arrangement with C-shaped profile strands extending along a center elevational area and an upper end of an anchoring pole.
  • a protection plank strand extends before the strand in the area.
  • Two profile strand shots of the profile strands are arranged in a distance and are connected at a dilatation section by a dilatation shot.
  • a bracing profile is provided in the dilatation shot, overlaps the dilatation shot and the profile strand shot in a form-fit manner and connects the dilatation shot and the profile strand shots.
  • JP2005076349A discloses a protective fence for vehicles.
  • the fence is provided with a plurality of supports erected along a driveway, an upper step horizontal beam and a lower step horizontal beam erected at a driveway side of the plurality of the supports.
  • Each support has a steel-made casting and the upper step horizontal beam and the lower step horizontal beam are aluminum-made extrusion shaped materials.
  • the outer shape of the driveway side of the upper step horizontal beam and the lower step horizontal beam is formed into an elliptical circular-arc.
  • FR1220041A and JPS5465538U both relate to rails with vertical pillars and horizontal elements extending between the pillars.
  • the aim of the invention is to achieve a joint and stiffener arrangement for a highway guardrail that does not have the drawbacks occurring in prior art and that has many other advantages also compared to earlier guardrails.
  • the highway guardrail according to the invention is characterized in that the guardrail pillar has a planar top end having an essentially horizontal top edge against which the open side of the rail is placed and also a joint part/stiffener part is installed at least partly inside the rail, at said joint of the rail with the guardrail pillar, and in that the joint part/stiffener part is also used to stiffen the rails in the section between the guardail pillars.
  • One preferred embodiment of the joint and stiffener arrangement according to the invention is characterized in that the cross-section of the joint part/stiffener part is of essentially the same shape as the cross-section of the rail, and in that the outer dimensions of the joint part/stiffener part are smaller than the inner dimensions of the rail, in which case the joint part/stiffener part can be fitted inside the rail by threading from the end of the rail.
  • a second preferred embodiment of the joint and stiffener arrangement according to the invention is characterized in that the guardrail pillar has an essentially horizontal top edge, in which is a hole for a bolt, in that inside the rail at the point of connection is a joint part/stiffener part, in which is a corresponding hole for a bolt, and in that a nut is threaded onto the bolt for tightening the joint or there is a threaded hole in the joint part/stiffener part.
  • Yet another preferred embodiment of the joint and stiffener arrangement according to the invention is characterized in that between the top edge of the guardrail pillar and the joint part/stiffener part a shim of essentially the thickness of the material of the rail is installed, through which shim a bolt is also installed.
  • the guardrail pillar can be fixed to the rail at any point of the rail whatsoever.
  • the tight installation tolerances in the longitudinal direction of the joint between the guardrail pillar and the rail are eliminated and installation is essentially speeded up. Separate perforations are not needed in the rail at the point of the fastener.
  • stiffener parts to be fastened by welding that assist the permanence of the shape of the rail are not needed in the structure according to the invention. That being the case, fabrication of the rail is considerably facilitated and perforations in the rail at the point of the stiffener are not needed.
  • stiffener part of the rail, the fixing part of the guardrail pillar and the splice part of the rail are based on the same type of closed profile, in which case instead of the three completely different parts required earlier, only two parts of different lengths based on one closed profile are required.
  • the highway guardrail in this case more particularly the center guardrail of a highway, is composed of essentially vertical guardrail pillars 1, which are fixed into the ground 3 preferably at essentially regular intervals, and of rails 2 fixed to the guardrail pillars.
  • the detail A marked in Fig. 1 refers to the point of connection between a guardrail pillar 1 and a rail 2 and it is described in more detail in the cutaway drawing of Figs. 2 and 3 .
  • Fig. 1 the detail B refers to the stiffening point of the rail and it is presented in more detail in the cutaway drawing of Fig. 5 .
  • the detail C of Fig. 1 refers to the splice joint point between two rails and it is presented in more detail in Fig. 4 .
  • the guardrail pillar 1 is preferably an open profile, e.g. a C-profile or a sigma profile. On its top end is an essentially horizontal top edge 5, which is e.g. bent to be horizontal or is formed by welding a slab to the top end of the guardrail pillar or an angle bar is fixed to it with bolts.
  • the aperture side of a rail 2 having an open profile is installed against this planar top end, as can be seen in Fig. 3 .
  • a joint part/stiffener part 4 having a closed profile is pushed inside the rail 2, as can be seen more particularly in Fig. 3 .
  • the term closed profile refers here to all the embodiments in which the peripheral rigidity of the joint part/stiffener part 4 is essentially greater than that of the rails 2.
  • the term closed profile means an envelope wholly surrounding an empty space, i.e. a tubular profile, or a closed profile fabricated from completely solid material.
  • the term closed profile also refers to profiles of all shapes, the thickness of the wall of which profiles is essentially greater than that of the rail 2, preferably at least five times the wall thickness of the rail.
  • a joint system/stiffener system 4 is a tubular profile, which has a sufficient peripheral rigidity and at the same time a small material requirement.
  • the joint part/stiffener part 4 is of essentially the same cross-sectional shape as the rail 2 except for the aperture point of the rail.
  • the joint part/stiffener part 4 is, however, smaller in its outer dimensions than the inner dimension of the rail 2, in which case it fits to move in the rail. In practice the fitting is, however, rather tight, so that the joint part/stiffener part 4 stiffens the rail 2.
  • the length of the joint part/stiffener part is preferably approx. 100 mm, but the invention is not, of course, limited to this.
  • joint part/stiffener part is a hole, which is placed at the same point as the hole in the horizontal top edge 5 of the guardrail pillar 1. Through these holes a bolt is pushed in the manner presented by Figs. 2 and 3 . The bolt, and thereby the whole joint, is tightened with a nut. Additionally, a shim 6 of essentially the thickness of the material of the rail 2 is arranged at the point of the aperture of the rail.
  • the joint part/stiffener part 4 is also used to stiffen the rail 2 in the section between the guardrail pillars, in addition to at the point of a guardrail pillar. This is presented as a longitudinal section in Fig. 5 .
  • This stiffening is implemented such that a joint part/stiffener part 4, as already described, is threaded inside the rail 2 such that it is situated essentially mid-way between guardrail pillars
  • the joint part/stiffener part is locked into its position in the manner shown by Fig. 5 with a bolt/nut joint or alternatively with a nut and by means of a threaded hole in the joint part/stiffener part 4. In this case, also, approx. 100 mm is generally sufficient for the length of the joint part/stiffener part 4.
  • Fig. 4 presents a cross-section of the detail C of Fig. 1 .
  • Shown here is a splice joint of two rails 2, which is implemented by using a joint part/stiffener part of the type described earlier, which is actually longer, e.g. approx. 400 mm, when used for this purpose.
  • a joint part and stiffener part 4 is pushed inside the end of each rail to be joined together and the joint is locked with bolts 7, which are pushed through the holes in the top surface and bottom surface of the rail as well as through bushings 8 inside the joint part/stiffener part 4 and/or holes in the joint part/stiffener part 4 and tightened with nuts 9.
  • there are eight units of bolts in the whole splice joint i.e. four at each end of the rail.
  • the joint part/stiffener part 4 is preferably made of steel and it can therefore also be of the same material as the rail 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Bridges Or Land Bridges (AREA)
EP12177593.6A 2011-08-02 2012-07-24 Highway guardrail with joint and stiffener system Active EP2554749B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20115778A FI123422B (sv) 2011-08-02 2011-08-02 Förbindnings- och förstyvningssystem för ett vägräcke

Publications (3)

Publication Number Publication Date
EP2554749A2 EP2554749A2 (en) 2013-02-06
EP2554749A3 EP2554749A3 (en) 2015-01-21
EP2554749B1 true EP2554749B1 (en) 2017-02-01

Family

ID=44515413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12177593.6A Active EP2554749B1 (en) 2011-08-02 2012-07-24 Highway guardrail with joint and stiffener system

Country Status (2)

Country Link
EP (1) EP2554749B1 (sv)
FI (1) FI123422B (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114837113A (zh) * 2022-05-07 2022-08-02 江苏卡斯特桥梁构件有限公司 一种可变形的多功能道路护栏

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1220041A (fr) * 1957-12-13 1960-05-20 Grille à éléments verticaux et horizontaux
JPS5465538U (sv) * 1977-10-18 1979-05-09
SE511024C2 (sv) 1997-03-26 1999-07-26 Blue Systems Ab Vägräcke
DE20113347U1 (de) * 2001-08-20 2001-10-18 Spig Schutzplanken-Produktions-Gesellschaft mbH & Co KG, 66839 Schmelz Leitschwellenstrang
CH694335A5 (de) 2002-06-06 2004-11-30 Weleco Ag Leitschranke.
JP2005076349A (ja) * 2003-09-02 2005-03-24 Sumikei-Nikkei Engineering Co Ltd 車両用防護柵
DE102006038336B3 (de) * 2006-08-15 2007-12-20 Spig Schutzplanken-Produktions-Gesellschaft Mbh & Co. Kg Schutzplankenanordnung
FR2911351B1 (fr) 2007-01-15 2012-11-16 Sec Envel Barriere de securite pour voies de circulation, procede d'installation et procede d'absorption de chocs contre une telle barriere
KR101052243B1 (ko) * 2010-12-22 2011-07-29 (주) 한길산업 다단 충격흡수 가이드레일

Also Published As

Publication number Publication date
EP2554749A3 (en) 2015-01-21
EP2554749A2 (en) 2013-02-06
FI123422B (sv) 2013-04-30
FI20115778A (sv) 2013-02-03
FI20115778A0 (sv) 2011-08-02

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