EP0877122A1 - Dynamischer Auffangzaun für Steinschlag mit Energieumwandlungsvorrichtungen - Google Patents

Dynamischer Auffangzaun für Steinschlag mit Energieumwandlungsvorrichtungen Download PDF

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Publication number
EP0877122A1
EP0877122A1 EP98480032A EP98480032A EP0877122A1 EP 0877122 A1 EP0877122 A1 EP 0877122A1 EP 98480032 A EP98480032 A EP 98480032A EP 98480032 A EP98480032 A EP 98480032A EP 0877122 A1 EP0877122 A1 EP 0877122A1
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EP
European Patent Office
Prior art keywords
cable
carrying
fusible
fuse
cables
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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
EP98480032A
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English (en)
French (fr)
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EP0877122B1 (de
Inventor
Laurent Thomel
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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
    • E01F7/00—Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04—Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • E01F7/045—Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps

Definitions

  • the present invention relates to stopping falls from stones on sloping ground and in particular a dynamic rockfall arrest barrier in which the carrying cables have loops of energy dissipation.
  • Fall protection barriers stones generally consist of a net held by posts across the predicted path of the stones on sloping ground.
  • the net consists of cables metallic, for example stainless steel, the wefts of which can slide relative to each other at the level of knots and linked mechanically by cable ties with stirrup.
  • the net is supported by guy wires connected to poles whose the feet can be fixed or articulated at their level foundation in the ground, the posts being stabilized by cables anchored in the ground upstream and downstream.
  • the net has a faculty of relative movement conferred by organs of limited resistance link which are cables placed between the net and upstream anchors, and which include traction limiting devices likely to leave spin portions of spare cable between jaws tightened so as to dissipate part of the energy by friction.
  • organs of limited resistance link which are cables placed between the net and upstream anchors, and which include traction limiting devices likely to leave spin portions of spare cable between jaws tightened so as to dissipate part of the energy by friction.
  • the traction limiters fail when the sliding between the jaws reaches the end of its travel.
  • the object of the invention is to provide a dynamic rockfall stop barrier in which loops using fusible cables allow the dissipation of kinetic energy due to the impact of blocks without causing the breakage of the carrying cables.
  • the main object of the invention is therefore a loop of energy dissipation for dynamic barrier stop rock fall of the type comprising a net disposed between posts anchored to the ground and held in place with cables carriers connecting the posts to support plates anchored to the ground; such a loop being mounted on at least one of the cables carriers and comprising a fusible cable of a length determined with reduced yield strength and modulus lower in elasticity than that of the carrying cable, the cable fuse comprising at each end a blocking means connecting the fuse cable and the cable carrying so that at rest the length of the fuse cable located between the locking means is significantly less than the length of the carrying cable located between the locking means, and each of the blocking means being intended to block the fuse cable on the carrying cable after the carrying cable has been subjected to a tensile force due to a fall of stones so that the fuse cable subsequently suffers a tensile force first causing its elongation and then its rupture.
  • Another object of the invention is a barrier dynamic rock fall arrest in which one or several of the carrying cables include a set of energy dissipation loops according to the invention arranged in parallel or a set of dissipation loops of energy according to the invention arranged in series or a combination of the two.
  • a dynamic barrier according to the invention is installed along a contour line and looks like illustrated in Figures 1 and 2.
  • a metal net is secured to the ground by means of posts anchored to the ground and held by carrying cables 14 and guy lines 16 anchored on the ground by means of support plates 18 and anchors.
  • energy dissipation kinetics is carried out initially thanks to the mesh particular of the net which allows, upon impact, to make slide the cables forming the frame.
  • the supporting cables which can as in the example illustrated in figure 1, form a triangle using two pulleys 20 or recesses located at the bottom and top of the posts 12, collect after the shock of the block most of kinetic energy acquired by the block and therefore must be equipped with energy dissipation mechanisms.
  • These mechanisms are loops with fusible cables as we will see, and can be, according to modes individuals carrying out the invention, loops mounted in parallel 22 or 24 or loops mounted in series 26.
  • FIG. 3 A first embodiment of a loop of energy dissipation is shown in Figure 3.
  • the loop includes a fuse cable 30 which can slide with the carrying cable 14 in two sliding means such as sliding sleeves 32 and 34 generally made of aluminum in which the two cables are clamped against each other according to a greater or lesser clamping force determining the friction resistance to be opposed to a force of traction exerted on the carrying cable 14.
  • a stop sleeve 36 or 38 At each end of the fuse cable 30 is a stop sleeve 36 or 38, generally made of aluminum fixed on the cable.
  • AT the inside of the loop 40 formed by the carrying cable 14 find two other stop sleeves 42 and 44 fixed on the carrier cable 14.
  • the left part is identical to the first mode of realization, but on the right side, there is only one locking sleeve 46 which together blocks the carrying cable 14 and the fuse cable 30.
  • everything is therefore passes in the manner described with reference to the first mode illustrated in FIG. 3, while for the right side, there is blockage from the start.
  • the fuse cable 30 stretches, lengthens and breaks when the sliding sleeve 32 is in abutment on the stop sleeve 36.
  • the two right and left parts have also locking sleeves 46 and 48.
  • the cable fuse 30 goes directly into tension lengthens and breaks.
  • the loop 40 of the carrying cable must have a length such that when the sleeves sliding stops on the stop sleeve (s) in the embodiments of Figures 3 and 4 or immediately in the embodiment of Figure 5, the length of the fuse cable 30 is less than the length of the part of carrying cable between the two locking points.
  • the length of the loop 40 should not be is too large to prevent an acceleration too much of the carrying cable when the fuse cable.
  • a larger loop 40 must be provided as in the illustration in figure 1 since the two cables start by sliding against each other with the result of reducing the length of the loop 40 located between the sleeves.
  • FIG. 6B a tensile force due to the impact of a block is exerted on the carrying cable 14 in the direction of arrows.
  • the fuse cable 30 has slid against the cable carrier in the sliding sleeve 32 (which dissipates a part of kinetic energy) until the stop sleeve 42 comes into abutment against the sliding sleeve 32.
  • the length of the loop 40 between the sleeves was therefore scaled down.
  • an interest in energy dissipation loops according to the invention is to mount them in parallel or in series of so that when each fusible cable breaks, the voltage exercises on the following until all cables fuses of all the loops are broken.
  • An example mounting of parallel loops is illustrated in figure 7 where all the loops are according to the embodiment of the Figure 5.
  • the fuse cable 50 is stretched between the two locking sleeves 52 and 54.
  • the fuse cable 50 breaks and the second fuse cable 56 breaks tends between the two locking sleeves 58 and 60.
  • After break of the fuse cable 56 it is the turn of the fuse cable 62 to be stretched between the sleeves 64 and 66 and finally to the cable 68 between sleeves 70 and 72.
  • the carrying cable 14 itself tends to its turn since there are no more unbroken fuse cables.
  • the kinetic energy to be dissipated gradually weakens the rupture of successive fuse cables. That is why, it is possible to provide successive fuse cables of which the resistance force opposite to the traction force exerted on the carrying cable is decreasing. Normally, with optimal mounting, the resistance opposed by the last fuse cable should be relatively small as far where the kinetic energy to dissipate is low at this time.
  • Load-bearing cables used in barriers rock fall arrest dynamics are generally metal cables, preferably steel, with a diameter generally between 10 and 25mm.
  • Fuse cables are cables with a length for example between 0.5m and lm and which can be the same diameter as the carrier cables.
  • Fuse cables which must have a reduced elastic limit and a modulus of elasticity lower than that of carrier cables, can be metal, especially steel, but also a material plastic or composite with mechanical parameters equivalent to steel, fire and radiation resistant they are constantly exposed to.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Revetment (AREA)
  • Adornments (AREA)
  • Secondary Cells (AREA)
  • Artificial Fish Reefs (AREA)
EP98480032A 1997-05-07 1998-05-07 Energieumwandlungsvorrichtung und dynamischer Auffangzaun für Steinschlag mit solchen Energieumwandlungsvorrichtungen Expired - Lifetime EP0877122B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9705880A FR2763083B1 (fr) 1997-05-07 1997-05-07 Barriere dynamique d'arret de chutes de pierres a boucles de dissipation d'energie
FR9705880 1997-05-07

Publications (2)

Publication Number Publication Date
EP0877122A1 true EP0877122A1 (de) 1998-11-11
EP0877122B1 EP0877122B1 (de) 2003-04-09

Family

ID=9506854

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98480032A Expired - Lifetime EP0877122B1 (de) 1997-05-07 1998-05-07 Energieumwandlungsvorrichtung und dynamischer Auffangzaun für Steinschlag mit solchen Energieumwandlungsvorrichtungen

Country Status (4)

Country Link
EP (1) EP0877122B1 (de)
AT (1) ATE237035T1 (de)
DE (1) DE69813073D1 (de)
FR (1) FR2763083B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001014646A1 (en) * 1999-08-23 2001-03-01 Rohde John R Energy absorbing breakaway steel guardrail post
EP1156158A1 (de) 2000-05-18 2001-11-21 Tecnap Sàrl Stoss-absorbierende Vorrichtung
EP1130166A3 (de) * 2000-02-25 2003-08-27 CARGNEL, Gianangelo Eine Schutzvorrichtung für Steinschlag, mit beutelförmigen Rückhaltenetz mit Verankerungskabeln an Ober- und Unterseite
EP1469130A1 (de) * 2003-04-14 2004-10-20 AVT Anker + Vorspanntechnik AG Bremselement
EP1840269A1 (de) * 2006-03-31 2007-10-03 Laurent Thomel Vorrichtung zum Bremsen eines sich in Bewegung befindlichen Körpers
WO2009052950A1 (de) * 2007-10-18 2009-04-30 Geobrugg Ag Bremsvorrichtung
FR2936786A1 (fr) * 2008-10-07 2010-04-09 Peugeot Citroen Automobiles Sa Dispositif de retenue d'objets empiles dans des zones de stockage.
EP2711461A1 (de) * 2012-09-21 2014-03-26 Trumer Schutzbauten GesmbH Stütze einer Steinschlagverbauung
WO2017103385A1 (fr) * 2015-12-16 2017-06-22 Technologie Alpine De Securite -Tas Dispositif de retenue de matériaux
CH713179A1 (de) * 2016-11-29 2018-05-31 Jakob Ag Seilbremse.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11391005B2 (en) 2017-08-04 2022-07-19 R&B Leasing, Llc System and method for mitigating rockfalls
CA3191473A1 (en) * 2020-08-10 2022-02-17 R&B Leasing, Llc System and method for mitigating rockfalls

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323070A1 (fr) * 1975-09-08 1977-04-01 Brugg Ag Kabelwerke Dispositif pour supporter de grandes charges dynamiques adapte a un ouvrage en cable metallique
FR2414586A1 (fr) 1978-01-16 1979-08-10 Ind Entreprise Barriere de protection et de securite, notamment contre les chutes de pierres
WO1987000878A1 (en) * 1985-07-31 1987-02-12 Gianangelo Cargnel Flexible barrier for arresting falling rocks
FR2593509A1 (fr) 1986-01-27 1987-07-31 Oreal Nouveaux ethers de polyglycerols et leur utilisation en cosmetique et en pharmacie
CH676259A5 (de) * 1988-10-12 1990-12-28 Isofer Ag
US5435524A (en) * 1993-12-06 1995-07-25 Ingram; L. Howard Impact fence

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2323070A1 (fr) * 1975-09-08 1977-04-01 Brugg Ag Kabelwerke Dispositif pour supporter de grandes charges dynamiques adapte a un ouvrage en cable metallique
FR2414586A1 (fr) 1978-01-16 1979-08-10 Ind Entreprise Barriere de protection et de securite, notamment contre les chutes de pierres
WO1987000878A1 (en) * 1985-07-31 1987-02-12 Gianangelo Cargnel Flexible barrier for arresting falling rocks
FR2593509A1 (fr) 1986-01-27 1987-07-31 Oreal Nouveaux ethers de polyglycerols et leur utilisation en cosmetique et en pharmacie
CH676259A5 (de) * 1988-10-12 1990-12-28 Isofer Ag
US5435524A (en) * 1993-12-06 1995-07-25 Ingram; L. Howard Impact fence

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001014646A1 (en) * 1999-08-23 2001-03-01 Rohde John R Energy absorbing breakaway steel guardrail post
EP1130166A3 (de) * 2000-02-25 2003-08-27 CARGNEL, Gianangelo Eine Schutzvorrichtung für Steinschlag, mit beutelförmigen Rückhaltenetz mit Verankerungskabeln an Ober- und Unterseite
EP1156158A1 (de) 2000-05-18 2001-11-21 Tecnap Sàrl Stoss-absorbierende Vorrichtung
EP1469130A1 (de) * 2003-04-14 2004-10-20 AVT Anker + Vorspanntechnik AG Bremselement
EP1840269A1 (de) * 2006-03-31 2007-10-03 Laurent Thomel Vorrichtung zum Bremsen eines sich in Bewegung befindlichen Körpers
FR2899251A1 (fr) * 2006-03-31 2007-10-05 Laurent Thomel Dispositif de freinage d'un corps en mouvement
WO2009052950A1 (de) * 2007-10-18 2009-04-30 Geobrugg Ag Bremsvorrichtung
CH701591B1 (de) * 2007-10-18 2011-02-15 Geobrugg Ag Bremsvorrichtung.
FR2936786A1 (fr) * 2008-10-07 2010-04-09 Peugeot Citroen Automobiles Sa Dispositif de retenue d'objets empiles dans des zones de stockage.
EP2174892A1 (de) * 2008-10-07 2010-04-14 Peugeot Citroën Automobiles S.A. Haltevorrichtung für in Speicherzonen gestapelte Gegenstände
EP2711461A1 (de) * 2012-09-21 2014-03-26 Trumer Schutzbauten GesmbH Stütze einer Steinschlagverbauung
WO2017103385A1 (fr) * 2015-12-16 2017-06-22 Technologie Alpine De Securite -Tas Dispositif de retenue de matériaux
FR3045682A1 (fr) * 2015-12-16 2017-06-23 Tech Alpine De Securite -Tas Dispositif de retenue de materiaux
CH713179A1 (de) * 2016-11-29 2018-05-31 Jakob Ag Seilbremse.
EP3330439A1 (de) * 2016-11-29 2018-06-06 Jakob AG Seilbremse

Also Published As

Publication number Publication date
FR2763083B1 (fr) 1999-07-02
EP0877122B1 (de) 2003-04-09
FR2763083A1 (fr) 1998-11-13
DE69813073D1 (de) 2003-05-15
ATE237035T1 (de) 2003-04-15

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