EP1728924B1 - Device for holding sliding masses or bodies - Google Patents

Device for holding sliding masses or bodies Download PDF

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Publication number
EP1728924B1
EP1728924B1 EP06011101A EP06011101A EP1728924B1 EP 1728924 B1 EP1728924 B1 EP 1728924B1 EP 06011101 A EP06011101 A EP 06011101A EP 06011101 A EP06011101 A EP 06011101A EP 1728924 B1 EP1728924 B1 EP 1728924B1
Authority
EP
European Patent Office
Prior art keywords
bearing rod
elements
structural bearing
framework
weakening
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.)
Not-in-force
Application number
EP06011101A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1728924A1 (en
Inventor
Paolo Orgnoni
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.)
Artigiana Costruzioni Srl
Original Assignee
Artigiana Costruzioni Srl
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Publication date
Application filed by Artigiana Costruzioni Srl filed Critical Artigiana Costruzioni Srl
Priority to SI200630495T priority Critical patent/SI1728924T1/sl
Publication of EP1728924A1 publication Critical patent/EP1728924A1/en
Application granted granted Critical
Publication of EP1728924B1 publication Critical patent/EP1728924B1/en
Not-in-force legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/20—Securing of slopes or inclines
    • 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 present invention relates to a retaining (i.e. holding) or braking device for sliding (i.e. downslope-moving) bodies or masses of/on slopes, of the type comprising a catch netting that is peripherally fastened to a support framework, which is, in turn, fixed to the ground by suitable mechanical means for anchorage to the soil.
  • sliding bodies or masses any assembly of entities comprising, either together or separately, rocks, soil, stones, gravel, snow, ice, etc. that break off from an inclined wall and tend to slide down under gravity.
  • the sliding bodies or masses can be, for example, earth-flows, landslides, ground failures, snow-slides, or even avalanches.
  • a known technique is to provide retaining devices for sliding bodies or masses which consist of nettings held in an extended position by a framework obtained by coupling a plurality of metallic orwooden girders or beams. This framework is then firmly anchored to the ground by means, for example, of a set of tie-rods connected to one or more posts that are deeply implanted into the soil.
  • the function performed by the netting which is usually made of synthetic or metallic meshes, is to cushion and/or retain the sliding masses or bodies, due to the shape and resilience thereof, without hindering the passage of the wind or other weather events, and allowing small wild animals to freely pass therethrough.
  • These devices are usually employed either as snow barriers, in which case they are arranged on slopes at those sites where a snow mass is likely to break off, or as soil retainers, in which case they can also be at least partially laid below ground level, and act as a static barrier for the soil, for the stabilization of slopes, river dykes and debris flows.
  • the Swiss Patent CH-A-674998 in the name of STREIFF, teaches to provide a retaining device for snow masses, or even avalanches, of the type in which a framework with beams rigidly fastened to each other supports a netting that is peripherally, loosely, fastened to this framework.
  • a rigid pyramidal framework is then arranged to fix said framework to the ground by means of anchoring means comprising screws or posts embedded (i.e. implanted) in the ground.
  • anchoring means comprising screws or posts embedded (i.e. implanted) in the ground.
  • the netting of the STREIFF device is arranged and shaped such as to absorb the impact and break the flow of snow and ice of possible snow-slides, snow masses or avalanches.
  • the European Patent EP-A-828897 in the name of LASER, describes a device for breaking snow masses such as avalanches and snow-slides according to the preamble of claim 1 by means of a netting supported, along the periphery thereof, by a framework formed by beams that are crossed and fastened to each other with some clearance therebetween.
  • a plurality of tie-rods being interposed between the ends of said beams and the one end of a strut, which is, in turn, coupled to the framework at the other end, connect said framework to a ground anchorage element.
  • the Spanish Utility Model ES-U-1057315 in the name of FATZER, relates to a retaining device for sliding masses of the type indicated above, in which the framework, of the type having crossed beams, lays on a plane and is pivotable on said laying plane.
  • US-A-5961099 discloses a safety net system for restraining mud or debris that includes at least one unit that comprises a net panel that is disposed between two columns and is secured to continuous top and bottom ropes. Further various elements of safety net system are provided with brake elements or load absorbing means.
  • the impact absorption is substantially demanded to the catch netting, essentially as a function of its elasticity, shape and arrangement on the framework.
  • the netting is subjected to a stress exceeding its resilience characteristics, the above conditions of abnormal or degraded operation of the device are likely to occur.
  • a retaining device for sliding masses or bodies of the type comprising a catch netting that is fastened to a framework anchored to the ground, which is capable of absorbing impacts of masses provided with a non-negligible linear momentum.
  • the retaining device for sliding bodies or masses according to the present invention comprises the features of claim 1.
  • these weakening and/or failure means are arranged such as to facilitate the collapse of the rod-like element structure, on which they are provided, on the downhill side of the device, when the latter is installed.
  • the bearing rod-like elements forming the framework suitable to support the catch netting are mutually rigidly fastened to each other and also to the ground by means of tie-rods, preferably made of steel rope, and by means of at least one strut that is suitable to connect the mutual coupling point or area of the rod-like elements to a suitable ground connecting member.
  • the device 1 for retaining sliding bodies, or masses along a slope 9 comprises, as is known in the art, at least one catch netting 2 that is fastened to a framework 4a, 4b, 4c, 4d, 8a, 8b, 10, and means 5a, 5b, 5c, 5d, 6, 7, 11 for anchoring the framework 4a, 4b, 4c, 4d, 8a, 8b, 10 to the ground.
  • the catch netting 2 which has the purpose of braking any sliding bodies or breaking the impacting snow masses, comprises a plurality of concatenated meshes, which are made of synthetic or metal wire, contoured by a fixing cable 3 that is fastened at the ends of a plurality of bearing rod-like elements 4a, 4b, 4c, 4d, which, in turn, form the above-mentioned framework.
  • the netting 2 is arranged, with respect to the slope 9, uphill of these bearing rod-like elements 4a, 4b, 4c, 4d, when the device 1 is installed.
  • the netting 2 may be also arranged downhill of the rod-like elements 4a, 4b, 4c, 4d, without departing from what is contemplated in the present invention.
  • netting 2 as illustrated and described herein is of the type with annular concatenated meshes
  • any other type of netting such as with rectangular or rhomboidal meshes, or also of the type with twined or crossed ropes, can be alternatively employed in the retaining and/or braking device for sliding bodies, or masses being the object of this patent.
  • bearing rod-like element any structural element which has a predominant dimension over the other two, and which, by departing from at least one area or point of mutual coupling with other bearing rod-like elements, has the function of supporting or connecting at least one portion of said catch netting 2.
  • the bearing rod-like elements 4a, 4b, 4c, 4d that are preferably made of steel girders or beams, are mutually fastened at only one individual mutual coupling area, which is substantially at the geometrical centre of the netting 2.
  • the rod-like elements 4a, 4b, 4c, 4d are radially arranged relative to this mutual coupling area and consist of two beams 4a, 4c and 4b, 4d, made of steel, which are crossed and mutually fastened at this coupling area.
  • the two beams 4a, 4c; 4b, 4d are integrally fastened to each other via to two brackets 8a, 8b that are duly shaped to hold the two beams 4a, 4c; 4b, 4d crossed at a predetermined angle and are also fixed to each other by a plurality of bolts 10, or other equivalent threaded elements that are arranged at the clearances between the two crossed beams.
  • the two brackets 8a, 8b and the bolts 10 provide a rigid fastening between the two beams 4a, 4c and 4b, 4d, which thus have no degree of freedom, i.e. no clearance is allowed therebetween.
  • the two beams 4a, 4c; 4b, 4d, or the corresponding bearing rod-like elements can be integrally fastened to each other in a given area of mutual coupling by welding or directly bolting the rod-like elements 4a, 4b, 4c, 4d.
  • the rigidity of the fastening between said bearing rod-like elements 4a, 4b, 4c, 4d forming the framework, and thus the rigidity of the latter, is particularly useful in view of the static mechanical strength and accuracy upon installation, when the device 1 illustrated therein is employed as a soil retainer, and is thus at least partially laid below ground level.
  • the beams 4a, 4c and 4b, 4d of the framework also have, at their ends, suitably drilled and/or shaped coupling flanges to hold the peripheral fixing cable 3 for the netting 2.
  • any beam 4a, 4c and 4b, 4d of the device 1 illustrated herein thus defines two distinct rod-like elements 4a, 4c and 4b, 4d.
  • the rod-like elements 4a, 4b, 4c, 4d may be provided by means of four different beams, or girders, that are fastened to each other.
  • the tie-rods 5a, 5b, 5c, 5d can made of steel rope and can connect the body 6 at the ends of the rod-like elements 4a, 4b, 4c, 4d.
  • the engaging points of the tie-rods 5a, 5b, 5c, 5d with the respective rod-like elements 4a, 4b, 4c, 4d can be located in any intermediate point thereof, and particularly can be arranged at, or nearness to the middle point of these rod-like elements 4a, 4b, 4c, 4d, relative to their mutual coupling area.
  • a stiffening strut 7 that can be made of steel tube.
  • the strut 7, that may be integral with or made as one piece with the coupling body 6, can be advantageously just rested on, or however fastened, with at least one degree of freedom, to the framework 4a, 4b, 4c, 4d, 8a, 8b, 10, at the mutual coupling area of the rod-like elements 4a, 4b, 4c, 4d.
  • the strut 7 is inserted in a bush 15 integral with the bracket 8b, such as to be free to move along its own axis, i.e. in a sliding manner relative to this bracket 8b.
  • this facilitates the installation of the device 1, while ensuring an optimum stability to the latter.
  • the strut 7, tie-rods 5a, 5b, 5c, 5d, and ground connecting member 6, 11 are a particular embodiment of said ground anchoring means of the framework 4a, 4b, 4c, 4d, 8a, 8b, 10.
  • this ground anchoring means of the framework 4a, 4b, 4c, 4d, 8a, 8b, 10 are arranged such as to allow the latter to be anchored to the slope 9 uphill of the catch netting 2.
  • the framework 4a, 4b, 4c, 4d, 8a, 8b, 10 of the netting 2 can be anchored to the ground also downhill of this netting 2, along the slope 9.
  • At least one of the rod-like elements 4a, 4b, 4c, 4d has weakening and/or failure means acting on its structure, which are capable of allowing the same to collapse, at at least one portion thereof, when the kinetic energy of the sliding bodies or masses impacting the same exceeds a value preset during the design step.
  • said weakening or failure means are arranged such as to facilitate the collapse of the structure of the rod-like element to which they are associated downhill of the slope 9.
  • the impact of the sliding bodies or masses against the netting 2 may allow the failure of the rod-like element 4a, 4b, 4c o 4d in the forward direction of the sliding mass, thereby ensuring a further impact absorption by the whole device 1.
  • these weakening and/or failure means acting on the structure of at least one bearing rod-like element 4a, 4b, 4c, 4d can be shaped and arranged on this rod-like element such as to act at a distance that, relative to the mutual coupling point or area of the bearing rod-like elements 4a, 4b, 4c, 4d, is lower than or equal to half the length of the rod-like element.
  • a preferred embodiment of the present invention as shown in Fig.
  • these weakening and/or failure means can be provided on all the rod-like elements 4a, 4b, 4c, 4d, with which the framework of the device 1 is provided, and consist of notches 12a, 12b, 12c, 12d, or linear tracts with a reduced (i.e. smaller) section that are formed along the structure of each rod-like element 4a, 4b, 4c, 4d.
  • each of the two steel beams 4a, 4c and 4b, 4d of the device 1 illustrated in Fig. 4 can have a pair of notches 12a, 12c and 12b, 12d, that are arranged uphill of these beams and equally spaced relative to said mutual coupling area of the rod-like elements, i.e. equally spaced relative to the brackets 8a, 8b.
  • FIG. 5 another embodiment of the weakening and/or failure means is represented according to a preferred aspect of the present invention.
  • each rod-like element 4a, 4b, 4c, 4d has a through notch 13a, 13b, 13c, 13d that determines the separation of the relative rod-like element in two different segments, which are fastened to each other via a hinge 14a, 14b, 14c, 14d.
  • the arrangement of the notches 13a, 13b, 13c, 13d and respective hinges 14a, 14b, 14c, 14d is such to allow the failure of the structure, i.e. the relative rotation of the upper segments of each rod-like element 4a, 4b, 4c, 4d relative to the lower elements, only in a downhill direction relative to the slope 9, i.e. in accordance with the direction of the sliding masses impacting on the netting 2.
  • This embodiment of the weakening and/or failure means acting on the structure of the bearing rod-like elements 4a, 4b, 4c, 4d is adapted to be replicated several times throughout each rod-like element 4a, 4b, 4c, 4d, such that the latter is composed by a plurality of segments fastened by hinges 14a, 14b, 14c, 14d allowing the same to rotate in the way defined by the impact direction of the sliding bodies or masses.
  • At least one bearing element 4a is sectioned, by a through notch 16, in two segments 17a, 17b that are mutually fastened by a folding plate 18 fixed to these segments by means of bolts or other threaded fixing means 19a, 19b.
  • This folding plate 18 can be also welded on at least one of the segments 17a, 17b providing said bearing rod-like element 4a and be fastened to the other segment 17b, 17a by threaded means, or also be welded to both segments 17a, 17b.
  • the folding plate 18, for example a steel folding plate having a small thickness, can be advantageously arranged along the downhill side of the relative bearing rod-like element 4a, such as to bend and allow the relative rotation of the two segments 17a, 17b in the way as defined by the impact direction of the sliding bodies or masses.
  • this embodiment of the weakening and/or failure means can be replicated two or more times throughout the extension of the bearing rod-like element 4a to which it is associated, and can also be provided on two or more of the rod-like elements 4a, 4b, 4c, 4d forming the framework of the device 1.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP06011101A 2005-05-31 2006-05-30 Device for holding sliding masses or bodies Not-in-force EP1728924B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200630495T SI1728924T1 (sl) 2005-05-31 2006-05-30 Naprava za zadrževanje drsečih mas ali teles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001020A ITMI20051020A1 (it) 2005-05-31 2005-05-31 Dispositivo di contenimento di corpi, o masse, frananti

Publications (2)

Publication Number Publication Date
EP1728924A1 EP1728924A1 (en) 2006-12-06
EP1728924B1 true EP1728924B1 (en) 2009-11-25

Family

ID=36888918

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06011101A Not-in-force EP1728924B1 (en) 2005-05-31 2006-05-30 Device for holding sliding masses or bodies

Country Status (8)

Country Link
EP (1) EP1728924B1 (it)
AT (1) ATE449883T1 (it)
DE (1) DE602006010617D1 (it)
ES (1) ES2336349T3 (it)
HK (1) HK1098802A1 (it)
IT (1) ITMI20051020A1 (it)
PT (1) PT1728924E (it)
SI (1) SI1728924T1 (it)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITVR20090005U1 (it) * 2009-03-31 2010-10-01 Betonform S R L Dispositivo di contenimento, cosiddetto dispositivo fermaneve, paravalanghe, paramassi, o simile dispositivo.
FR2949480B1 (fr) * 2009-09-01 2011-09-23 Heaven Climber Invest H C Invest Module pour barriere de protection contre les risques naturels et barriere de protection
EP2575423B1 (en) 2010-03-26 2014-11-26 Santorum, Lucillo Structure for the protection and/or consolidation of slopes
EP2385174A1 (en) * 2010-12-27 2011-11-09 Centrum Dopravního Vyzkumu, V.v.i. Fastening pin for geosynthetics
FR2971273B1 (fr) * 2011-02-03 2013-08-02 Acro Btp Ecran metallique souple pour retenue collinaire et confortement de sol
IT1404819B1 (it) 2011-02-10 2013-11-29 Betonform S R L Dispositivo di contenimento
FR2992335B1 (fr) * 2012-06-21 2014-08-29 Acro Btp Structure de soutenement, dispositif de soutenement associe et dispositif d'amenagement de bord de piste skiable utilisant ceux-ci
WO2014111755A1 (en) 2013-01-16 2014-07-24 Incofil Srl Umbrella-shaped structure for the protection and/or consolidation of slopes
EP2848737B1 (de) * 2013-09-13 2016-11-02 Mair Wilfried GmbH / Srl Verbauungsschild
FR3026117B1 (fr) * 2014-09-24 2018-03-09 Technologie Alpine De Securite -Tas Dispositif de retenue de materiaux et systeme de retenue de materiaux comprenant un tel dispositif de retenue
JP6681681B2 (ja) * 2015-08-10 2020-04-15 吉佳エンジニアリング株式会社 受圧板
FR3045682B1 (fr) 2015-12-16 2019-07-12 Technologie Alpine De Securite -Tas Dispositif de retenue de materiaux
JP6847444B2 (ja) * 2017-02-15 2021-03-24 吉佳エンジニアリング株式会社 斜面保護システム
FR3117136B1 (fr) * 2020-12-04 2024-01-12 Sbj & Co Sa Structure de soutènement et dispositif de soutènement correspondant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1288181B1 (it) * 1996-03-29 1998-09-11 Ennio Lattisi Elemento fermaneve a rete con struttura ad ombrello.
US5961099A (en) * 1998-01-23 1999-10-05 Brugg Cable Products, Inc. Safety net system for debris and mud slides

Also Published As

Publication number Publication date
ATE449883T1 (de) 2009-12-15
SI1728924T1 (sl) 2010-02-26
PT1728924E (pt) 2010-02-03
HK1098802A1 (en) 2007-07-27
ES2336349T3 (es) 2010-04-12
DE602006010617D1 (de) 2010-01-07
ITMI20051020A1 (it) 2006-12-01
EP1728924A1 (en) 2006-12-06

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