EP3631093B1 - Barrière dynamiques contre les chutes de pierres avec d'un dispositif d'absorption d'impact - Google Patents
Barrière dynamiques contre les chutes de pierres avec d'un dispositif d'absorption d'impact Download PDFInfo
- 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
- Authority
- EP
- European Patent Office
- Prior art keywords
- rope
- tube
- hole
- barrier against
- dynamic barrier
- 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
Links
- 230000004888 barrier function Effects 0.000 title claims description 31
- 230000008719 thickening Effects 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000006096 absorbing agent Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000012669 compression test Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
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
- 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.
Landscapes
- 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)
- Barrière dynamique contre les chutes de pierres comprenant un dispositif d'absorption des chocs (100),ledit dispositif comprenant au moins un tube (102),ledit au moins un tube ayant une paroi qui est munie de deux trous sur un premier côté (104, 106) et de deux trous sur un second côté (108, 110),ledit dispositif comprenant en outre un premier câble (112) et un second câble (118),ledit premier câble (112) passant à travers ledit au moins un tube (102) en commençant par un premier trou sur le premier côté (104) et en allant jusqu'à un premier trou sur le second côté (108),ledit premier câble (112) étant muni à son extrémité d'un premier épaississement (116) qui empêche ledit premier câble de glisser à travers ledit au moins un tube (102),ledit second câble (118) passant à travers ledit au moins un tube (102) en commençant par un second trou sur le second côté (110) et allant jusqu'à un second trou sur le premier côté (106),ledit second câble (118) étant muni à son extrémité d'un second épaississement (122) qui empêche ledit second câble de glisser à travers ledit au moins un tube,caractérisée en ce queledit premier élément d'épaississement est fixé audit premier câble et ne peut pas glisser le long dudit premier câble,ledit second élément d'épaississement est fixé audit second câble et ne peut pas glisser le long dudit second câble.
- Barrière dynamique contre les chutes de pierres selon la revendication 1,
dans laquelle ledit premier élément d'épaississement (116) et ledit second élément d'épaississement (122) sont une gaine, une soudure ou une sangle. - Barrière dynamique contre les chutes de pierres selon la revendication 1 ou 2,
dans laquelle ledit premier câble (112) et ledit second câble (118) sont sensiblement parallèles l'un à l'autre. - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes,
dans laquelle le premier trou sur le premier côté (202) est positionné de façon diamétrale par rapport au premier trou sur le second côté (206) et dans laquelle le second trou sur le premier côté (204) est positionné de façon diamétrale par rapport au second trou sur le second côté (208). - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes,
ledit dispositif comprenant deux tubes ou plus (302, 304) . - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes,
dans laquelle ledit au moins un tube a une section transversale circulaire. - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications 1 à 5, dans laquelle ledit au moins un tube a une section transversale rectangulaire.
- Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes,
dans laquelle ledit tube n'a pas de soudure. - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes,
dans laquelle des plaques rigides (310, 316) sont positionnées entre lesdits premier et/ou second épaississements (308, 314) et ledit au moins un tube (302, 304) . - Barrière dynamique contre les chutes de pierres selon l'une quelconque des revendications précédentes, comprenant en outre :des montants,des filets positionnés entre lesdits montants,des câbles périphériques suspendant lesdits filets entre lesdits montants,des câbles de support reliant lesdits montants aux ancres dans le sol, dans laquelle au moins un dispositif d'absorption des chocs est positionné sur l'un desdits câbles périphériques ou sur lesdits câbles de support.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17172793 | 2017-05-24 | ||
PCT/EP2018/062102 WO2018215216A1 (fr) | 2017-05-24 | 2018-05-09 | Dispositif d'absorption d'impact pour barrières dynamiques contre les chutes de pierres |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3631093A1 EP3631093A1 (fr) | 2020-04-08 |
EP3631093B1 true EP3631093B1 (fr) | 2022-12-14 |
Family
ID=58772765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18725793.6A Active EP3631093B1 (fr) | 2017-05-24 | 2018-05-09 | Barrière dynamiques contre les chutes de pierres avec d'un dispositif d'absorption d'impact |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3631093B1 (fr) |
CL (1) | CL2019003092A1 (fr) |
ES (1) | ES2939666T3 (fr) |
PE (1) | PE20210055A1 (fr) |
PL (1) | PL3631093T3 (fr) |
PT (1) | PT3631093T (fr) |
WO (1) | WO2018215216A1 (fr) |
Families Citing this family (4)
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 |
US10738424B2 (en) * | 2017-08-04 | 2020-08-11 | R&B Leasing, Llc | System and method for mitigating rockfalls |
WO2022035508A1 (fr) * | 2020-08-10 | 2022-02-17 | R&B Leasing, Llc | Système et procédé d'atténuation des chutes de pierres |
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)
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 |
-
2018
- 2018-05-09 PL PL18725793.6T patent/PL3631093T3/pl unknown
- 2018-05-09 PT PT187257936T patent/PT3631093T/pt unknown
- 2018-05-09 PE PE2019002036A patent/PE20210055A1/es unknown
- 2018-05-09 WO PCT/EP2018/062102 patent/WO2018215216A1/fr active Application Filing
- 2018-05-09 ES ES18725793T patent/ES2939666T3/es active Active
- 2018-05-09 EP EP18725793.6A patent/EP3631093B1/fr active Active
-
2019
- 2019-10-28 CL CL2019003092A patent/CL2019003092A1/es unknown
Also Published As
Publication number | Publication date |
---|---|
WO2018215216A1 (fr) | 2018-11-29 |
PT3631093T (pt) | 2023-02-21 |
ES2939666T3 (es) | 2023-04-25 |
PE20210055A1 (es) | 2021-01-11 |
EP3631093A1 (fr) | 2020-04-08 |
CL2019003092A1 (es) | 2020-02-21 |
PL3631093T3 (pl) | 2023-04-03 |
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