EP3631093B1 - Dynamische barriere gegen steinschlag mit einer stossdämpfungsvorrichtung - Google Patents

Dynamische barriere gegen steinschlag mit einer stossdämpfungsvorrichtung Download PDF

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Publication number
EP3631093B1
EP3631093B1 EP18725793.6A EP18725793A EP3631093B1 EP 3631093 B1 EP3631093 B1 EP 3631093B1 EP 18725793 A EP18725793 A EP 18725793A EP 3631093 B1 EP3631093 B1 EP 3631093B1
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EP
European Patent Office
Prior art keywords
rope
tube
hole
barrier against
dynamic barrier
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Active
Application number
EP18725793.6A
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English (en)
French (fr)
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EP3631093A1 (de
Inventor
Daniel Castro Fresno
Elena BLANCO FERNANDEZ
Laura CASTANON - JANO
Alejandro ALONSO - ESTEBANEZ
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Bekaert NV SA
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Bekaert NV SA
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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

Definitions

  • the invention relates to an a dynamic barrier against rockfalls comprising an impact absorbing device and to a slope protection system with such an impact absorbing device in a dynamic barrier against rockfalls.
  • Dynamic barriers against rockfalls are in general not designed to absorb high energies caused by e.g. large rocks falling. Therefore, energy absorbing devices are added to the screen or fence system. Kinetic and potential energy released by rockfall must be transformed in deformation, fracture, or heat caused by friction of elements of the impact absorbing devices.
  • Impact absorbing devices must first assure continuity of the screen or fence and thus prevent the screen or fence to be broken in two or more parts.
  • impact absorbing devices must be able to absorb various levels of energy, since it is not known in advance how big the impact may be.
  • a third requirement is that the impact absorbing devices must be resistant to severe weather conditions. They should be resistant to corrosion, continue working under humid conditions or under varying temperatures.
  • a last and fourth requirement is that the impact absorbing devices must have a long life time since they are in general installed and used on locations that are not easy to reach.
  • Patent application KR-A-20150031259 discloses an impact absorbing mechanism where a rope is encircling a tube. Upon impact the released energy is transformed into deformation energy of the tube and in heat due to friction between the rope and the tube. The deformation of the tube is only locally in the region of the encircling rope.
  • Patent applications KR-A-20120083874 and KR-A-20110130077 disclose a rockfall protection fence. Upon impact the tension on the rope is transferred to a device with a tube shaped part that can deform to absorb the transferred impact energy. This impact absorbing device needs to be located on a post.
  • Patent application US-A-2010 0327244 discloses another rockfall protection fence.
  • Rope members go through posts in opposite directions and energy absorbers are provided to hold the ends of the ropes in place.
  • Absorbers included in this patent are friction-resistant type. When tensile force overcomes their friction resistance, ropes slide through the absorber. Posts does not deform, but act as a lock.
  • Utility model CN-U-205908105 discloses an electric power facility rail guard.
  • the tension of the ropes is obtained by regularly screwing tightening nuts.
  • Yet another object of the invention to provide an impact absorbing device that can be installed at various locations in a dynamic barrier against rockfalls.
  • a dynamic barrier against rockfalls comprising an impact absorbing device, said impact absorbing device comprising at least one tube.
  • This tube or these tubes have a wall that is provided with two holes at a first side and two holes at a second side.
  • the device further comprises a first rope and a second rope.
  • the first rope passes through the tube or tubes starting from a first hole at the first side and going to a first hole at the second side of a first tube, and so on until all tubes have been passed through.
  • the first rope is provided at its one end with a first thickening element such as a sleeve that prevents the first rope from slipping back or being pulled back through the tube or tubes.
  • the first thickening element is fixed to the first rope and unable to slide along the first rope.
  • the second rope passes through the tube or tubes starting from a second hole at the second side and going to a second hole at the first side of a first tube and so on until all tubes have been passed through.
  • the second rope is provided at its one end with a second thickening element such as a sleeve that prevents the second rope from slipping back or being pulled back through the tube or tubes.
  • the second thickening element is fixed to the second rope and unable to slide along the second rope.
  • this impact absorbing device allows to transform impact energy into energy needed to deform the tube or tubes, into energy needed to plastically elongate both ropes and into heat energy caused by friction of the ropes in the holes and with the stiff elements.
  • the tubes are preferably made of steel, aluminium or of another metallic alloy with a high level of deformation potential. These tubes or any of the rest of the parts can be made of neoprene, gum or other plastic material with similar properties. By selecting the proper tube material, by determining the number of tubes (one, two, three or more) and by designing the thickness of the tubes, one may obtain a large range of impact energy that can be absorbed.
  • first rope and the second rope are arranged substantially parallel to each other.
  • the first hole at the first side is positioned diametrically vis-à-vis the first hole at the second side.
  • the second hole at the first side is positioned preferably diametrically vis-à-vis the second hole at the second side.
  • the above design namely parallel ropes and diametrically opposed holes, aims at obtaining the maximum possible deformation energy from the tubes.
  • the tube or tubes may have a circular cross-section, a rectangular cross-section or a rhombic cross-section.
  • the tubes do not have irregularities in the material that may cause weakening of the tubes and decrease in the deformation energy. More particularly, the tubes do not have welds.
  • the thickening element at the end of the ropes may work together in combination with a stiff element.
  • Stiff elements e.g. stiff plates, are positioned between the first and/or the second thickenings and the at least one tube.
  • the thickening at the rope end and the stiff element must work together such that after complete compression of the tube or tubes, the ropes still do not slip back through the tubes. The ropes must be blocked so that ultimately plastic elongation of the ropes can occur until fracture of the ropes. Fracture of the thickened rope ends is to be avoided.
  • the first and/or said second thickenings transmit a compression force to the at least one tube and transform the impact energy into energy needed to deform the at least one tube by compression.
  • the impact energy can also be partially transformed into energy needed to plastically elongate the ropes and into heat energy caused by friction of the ropes in the holes and with the possible stiff elements.
  • absorbing devices acting by friction are not regular in their behavior.
  • Two devices with the same geometry and absorbing mechanism can have very different activation forces as well as different shape of the Force-displacement curve. This is related with the inaccuracy of (or difficulty on applying the same) the bolt pressure or small differences on the surface roughness.
  • Energy absorbers acting by buckling have a more regular behavior all along their characteristic curve, excepting the activation energy that could also vary for the same tube profile. On the contrary and as an advantage of the present invention, the present invention does not have these problems. Experimental tests have been carried out with the same geometry according to the present invention, and Force-Displacement curves obtained are identical one to each other.
  • a slope protection system as a dynamic barrier against rockfalls that comprises an impact absorbing device according to the first aspect of the invention.
  • the impact absorbing devices can be also used for mudflow barriers, debris barriers or snow barriers as different dynamic barriers for several applications.
  • the dynamic barrier may have several posts and nets, screens or fences positioned and installed between the posts at the dynamic barrier.
  • Perimeter ropes are hanging the nets, screens or fences to the posts.
  • Supporting ropes are connecting the posts to anchors in the ground.
  • the impact absorbing device may be positioned on one or more of the perimeter ropes, or on one or more of the supporting ropes or on both types of ropes, thus giving flexibility to locate the impact absorbing device at the positions where the needs may be the highest.
  • FIG. 1 is a perspective view of an impact absorbing device 100 according to the invention.
  • the device 100 has one tube 102.
  • This tube 102 has a first hole 104 and a second hole 106 at a first side and a first hole 108 and a second hole 110 at a second side.
  • a first rope 112 passes through the first hole 104 at the first side and through the first hole 108 at the second side. Further on, the first rope also passes through a solid stiff block 114.
  • the first rope 112 is provided with a sleeve 116. The sleeve 116 transmits the force exercised on the first rope 112 to the solid stiff block 114.
  • the stiff block 114 prevents the first rope 112 from slipping back.
  • a second rope 118 passes through a hole in the stiff block 114 at the second side, through a second hole 110 at the second side, through a second hole 106 at the first side, and finally through a hole of a stiff block 120 at the first side.
  • the second rope 118 ends with a sleeve 122.
  • the forces on the screen or fence will be translated in pulling forces on the first rope 112 and the second rope 118.
  • the sleeves 114 and 140 will transform these pulling forces on the ropes 112, 118 into compressive forces on the stiff blocks 114, 120.
  • the tube 102 will start to deform plastically and absorb at least part of the impact energy. Simultaneously heat is generated between the ropes 112, 118 and the stiff blocks 114, 120 and between the ropes 112, 118 and the tube 102.
  • the ropes 112, 118 may start to deform plastically and absorb also part of the impact energy.
  • FIG. 2 is a perspective view of a further improvement of a tube 200 used in an impact absorbing device according to the invention.
  • the tube 200 has a first hole 202 and a second hole 204 at a first side and a first hole 206 and a second hole 208 at a second side.
  • Hole 202 is positioned diametrically vis-à-vis hole 206.
  • hole 204 is positioned diametrically vis-à-vis hole 208.
  • the presence of the holes 202, 204, 206, 208 may weaken section A-A in the tube 200 to such an extent that deformation starts only in section A-A.
  • the energy absorbable by the tube could be doubled by increasing somewhat the diameter D and the thickness T.
  • FIG 3 is a perspective view of a preferable embodiment of an impact absorbing device 300 according to the invention.
  • the impact absorbing device 300 has two tubes 302 and 304.
  • a first rope 306 passes through the two tubes 302, 304 and comprises a sleeve 308 at its one end at one side.
  • This sleeve 308 has an external diameter that is larger than the hole through a stiff, solid plate 310 where the first rope 306 passes through.
  • a second rope 312 passes through the tubes 302, 304 and ends with a sleeve 314 in contact with a stiff solid plate 316 at the other side.
  • Static tensile tests have been carried out separately on the ropes in order to measure the possible energy that can be absorbed by the ropes. This is done by recording a load displacement curve and by measuring the area under the curve.
  • Test speed was set at the value that is recommended by the ETAG for static tests on energy dissipators.
  • the outer diameter D of the two tubes and the thickness T of the tubes determined The displacement of the tubes, the displacement of the ropes and the displacement of the clamps in the test that were all recorded
  • Figure 4 is a schematic view of a dynamic barrier against rockfalls 400 comprising impact absorbing devices according to the invention .
  • a dynamic barrier against rockfalls 400 comprises a number of poles 402, 404, 406 between which fences, nets or screens 408, 410 are hung. These fences 408, 410 may preferably be chain link fences. The fences 408, 410 are stretched and attached to the poles 402, 404, 406 with the help of perimeter ropes 412, 414, 416 and 418. At the left side, supporting ropes 420, 422 attach the left most pole 402 to a support or anchor 424. At the left side, supporting ropes 426, 428 connect the right most pole 406 to a support or anchor 430. The poles in-between may also be connected or attached to a support.
  • Impact absorbing devices 434, 436 may be positioned on the upper perimeter ropes 412 and 414.
  • impact absorbing devices 432, 438 may be positioned on the supporting ropes 420, 428.

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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)
  • Fluid-Damping Devices (AREA)

Claims (10)

  1. Dynamische Sperre gegen Steinschlag, umfassend eine stoßdämpfende Vorrichtung (100),
    wobei die Vorrichtung mindestens ein Rohr (102) umfasst,
    wobei das mindestens eine Rohr eine Wand hat, die mit zwei Löchern an einer ersten Seite (104, 106) und zwei Löchern an einer zweiten Seite (108, 110) versehen ist,
    wobei die Vorrichtung ferner ein erstes Seil (112) und ein zweites Seil (118) umfasst,
    wobei das erste Seil (112) durch das mindestens eine Rohr (102) geht, ausgehend von einem ersten Loch an der ersten Seite (104) und weiter zu einem ersten Loch an der zweiten Seite (108),
    wobei das erste Seil (112) an seinem einen Ende mit einer ersten Verdickung (116) versehen ist, die verhindert, dass das erste Seil durch das mindestens eine Rohr (102) zurückrutscht,
    wobei das zweite Seil (118) durch das mindestens eine Rohr (102) geht, ausgehend von einem zweiten Loch an der zweiten Seite (110) und weiter zu einem zweiten Loch an der ersten Seite (106),
    wobei das zweite Seil (118) an seinem einen Ende mit einer zweiten Verdickung (122) versehen ist, die verhindert, dass das zweite Seil durch das mindestens eine Rohr zurückrutscht,
    dadurch gekennzeichnet, dass
    das erste Verdickungselement an dem ersten Seil festgelegt ist und nicht entlang des ersten Seils gleiten kann,
    das zweite Verdickungselement an dem zweiten Seil festgelegt ist und nicht entlang des zweiten Seils gleiten kann.
  2. Dynamische Sperre gegen Steinschlag nach Anspruch 1,
    wobei das erste Verdickungselement (116) und das zweite Verdickungselement (122) eine Hülse, eine Verschweißung oder eine Schlinge sind.
  3. Dynamische Sperre gegen Steinschlag nach Anspruch 1 oder 2,
    wobei das erste Seil (112) und das zweite Seil (118) im Wesentlichen parallel zueinander sind.
  4. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche,
    wobei das erste Loch an der ersten Seite (202) dem ersten Loch an der zweiten Seite (206) diametral gegenüber positioniert ist und wobei das zweite Loch an der ersten Seite (204) dem zweiten Loch an der zweiten Seite (208) diametral gegenüber positioniert ist.
  5. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche,
    wobei die Vorrichtung zwei oder mehr Rohre (302, 304) umfasst.
  6. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche,
    wobei das mindestens eine Rohr einen kreisförmigen Querschnitt hat.
  7. Dynamische Sperre gegen Steinschlag nach einem der Ansprüche 1 bis 5, wobei das mindestens eine Rohr einen rechteckigen Querschnitt hat.
  8. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche,
    wobei das Rohr keine Verschweißungen hat.
  9. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche,
    wobei steife Platten (310, 316) zwischen der ersten und/oder zweiten Verdickung (308, 314) und dem mindestens einen Rohr (302, 304) positioniert sind.
  10. Dynamische Sperre gegen Steinschlag nach einem der vorhergehenden Ansprüche, ferner umfassend:
    - Pfosten,
    - zwischen den Pfosten positionierte Netze,
    - Begrenzungsseile, an denen die Netze zwischen den Pfosten aufgehängt sind,
    - Stützseile, die die Pfosten mit den Ankern im Boden verbinden,
    wobei mindestens stoßdämpfende Vorrichtung an einem der Begrenzungsseile oder an den Stützseilen positioniert ist.
EP18725793.6A 2017-05-24 2018-05-09 Dynamische barriere gegen steinschlag mit einer stossdämpfungsvorrichtung Active EP3631093B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17172793 2017-05-24
PCT/EP2018/062102 WO2018215216A1 (en) 2017-05-24 2018-05-09 Impact absorbing device for dynamic barriers against rockfalls

Publications (2)

Publication Number Publication Date
EP3631093A1 EP3631093A1 (de) 2020-04-08
EP3631093B1 true EP3631093B1 (de) 2022-12-14

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EP18725793.6A Active EP3631093B1 (de) 2017-05-24 2018-05-09 Dynamische barriere gegen steinschlag mit einer stossdämpfungsvorrichtung

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EP (1) EP3631093B1 (de)
CL (1) CL2019003092A1 (de)
ES (1) ES2939666T3 (de)
PE (1) PE20210055A1 (de)
PL (1) PL3631093T3 (de)
PT (1) PT3631093T (de)
WO (1) WO2018215216A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10738424B2 (en) * 2017-08-04 2020-08-11 R&B Leasing, Llc System and method for mitigating rockfalls
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
JP7200420B1 (ja) 2022-04-19 2023-01-06 東京製綱株式会社 防護柵、緩衝装置及びその製造方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US600964A (en) * 1898-03-22 End post for line-wire fences
US4518953A (en) * 1980-10-20 1985-05-21 Kent Hunter Security fence system
JP4808226B2 (ja) 2008-02-06 2011-11-02 株式会社プロテックエンジニアリング 衝撃吸収柵
KR101207714B1 (ko) 2010-05-27 2012-12-03 주식회사 도영엔지니어링 충격에너지의 분배 및 흡수가 가능한 낙석방지 울타리
KR101174619B1 (ko) 2012-07-12 2012-08-16 주식회사 도영엔지니어링 충격에너지의 분배 및 흡수가 가능한 낙석방지 울타리
KR20150031259A (ko) 2015-02-23 2015-03-23 공주대학교 산학협력단 파이프형 에너지 소산 장치가 부설된 낙석방지 울타리
CN205908105U (zh) * 2016-08-08 2017-01-25 国网山西省电力公司大同供电公司 一种电力设施防护栏

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Publication number Publication date
PL3631093T3 (pl) 2023-04-03
ES2939666T3 (es) 2023-04-25
PT3631093T (pt) 2023-02-21
WO2018215216A1 (en) 2018-11-29
PE20210055A1 (es) 2021-01-11
CL2019003092A1 (es) 2020-02-21
EP3631093A1 (de) 2020-04-08

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