EP0527115A1 - Schallisolierte und -schluckende modulare Platteneinheit zur Bildung von Lärmbarrieren - Google Patents

Schallisolierte und -schluckende modulare Platteneinheit zur Bildung von Lärmbarrieren Download PDF

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Publication number
EP0527115A1
EP0527115A1 EP92830415A EP92830415A EP0527115A1 EP 0527115 A1 EP0527115 A1 EP 0527115A1 EP 92830415 A EP92830415 A EP 92830415A EP 92830415 A EP92830415 A EP 92830415A EP 0527115 A1 EP0527115 A1 EP 0527115A1
Authority
EP
European Patent Office
Prior art keywords
deadening
sound
layer
soundproofing
board
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.)
Granted
Application number
EP92830415A
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English (en)
French (fr)
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EP0527115B1 (de
Inventor
Giovanni C/O Insokell S.P.A. Rinaldi
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.)
INSOKELL SpA
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INSOKELL SpA
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Publication of EP0527115A1 publication Critical patent/EP0527115A1/de
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Publication of EP0527115B1 publication Critical patent/EP0527115B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
    • E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
    • E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
    • E01F8/0064—Perforated plate or mesh, e.g. as wall facing
    • E01F8/007—Perforated plate or mesh, e.g. as wall facing with damping material

Definitions

  • This invention relates to a soundproofing and deadening board modular unit for antinoise barriers.
  • this invention belongs in the framework of antinoise barrier technologies which are particularly suitable for employment as soundproofing members on highways, freeways, railways and the like.
  • barriers are made up of three fundamental members such as the modular boards making up the soundproofing shield, the supporting uprights consisting of steel structural work, and the foundation structures.
  • the latter exert a stronger action as in addition to interfere on the diffusion in the acoustic field preventing with their soundproofing characteristics it from propagating downstream of the soundproofing barrier, also realize a deadening effect of acoustic energy on the side of the barrier itself which is exposed to the noise source, which might be for instance the road or the railway traffic.
  • box-type boards or the boards made up of an outer structure consisting of a metal sheet (steel or aluminum alloys) or plastic or composite materials (ABS, plastic reinforced with glass fibres) or a combination of the same, and of a mattress or a plate of a sound-deadening material put inside the structure, and the so-called "sandwich” type boards, or boards built by mechanical coupling through gluing operations of a perfectly soundproofing member with a sound-deadening layer made up of plates of a fibrous or pit-bearing material.
  • the sound-deadening property of the material becomes degraded in time due to the effect of water and dust thrown against the boards by vehicles in transit.
  • the material so thrown against the board become absorbed by the surface of the porous material on the side facing the drilled hull and plug such surface, and in the long time the material projected lowers the sound-deadening properties of the board.
  • a further risk of degradation consists in vibrations induced in the board itself by wind forces and by the passing vehicles, which vibrations favour in time the flaking off of the porous material.
  • a solution intended for improving the protection degree of the box-type structure, so reducing the penetration of liquids is suggested in the patent application No. 47756-A/ 85 in the name of Hans Biegler.
  • a structural member is disclosed in said patent application, said member being intended for a protective wall and having a metal hull exposed to the noise sources and made up of an aluminum alloy, endowed with slits staggered with respect to each other and realized by shearing and drawing in the shape of a weathered roof so as to allow the sound wave to pass and the successive absorption of said wave to occur by the action of the porous mattress, but lowering at the same time the penetration of liquids and other atmospheric agents that cause the degradation of the good characteristics of the mattress itself.
  • the realization of a self-supporting multilayer structure for a soundproofing and sound-deadening board for antinoise barriers is proposed according to this invention in order to increase the sound-deadening power of the board itself, which realization removes the impregnation effects and exploits the principle of absorption of porous and waterproof membranes to realize the maximum absorption of the frequency range of the maximum sound emission of vehicles, and, in order to increase the soundproofing power of the board, it is proposed according to this invention to provide a layer made up of heavy waterproof rolled sections and to stiffen the outer hull that closes the board itself.
  • a soundproofing and sound-deadening board inside which a self-supporting multilayer structure is provided which is made up of layers of a material having differentiated densities, such layers being joined together by means of a pressing process and in which, in order to improve the soundproofing function, the presence is provided of a further layer made up of a heavy material, which is connected in its turn to said multilayer structure having differentiated densities, capable of giving also rise to a stiffening of the board itself without giving rise to any size changes at the front and back positions of the metal sheet.
  • a multilayer mattress closed by an outer membrane and realized with a plastic material film which is capable of preventing liquids from penetrating and to obtain protection against atmospheric agents to the whole system, said multilayer mattress being provided with at least two porous layers of different densities, the layer having the highest density facing toward the noise source.
  • the mathematical model for visualizing the acoustic properties of said multilayer structure is realized by means of the formalism of the transfer matrix, employing the characteristics of the single layers as parameters.
  • the characteristics of the layers considered in order to obtain the mathematical model capable of supplying the necessary sound-deadening and sound proofing values are the following:
  • the proposal is put forward of shaping the profile of the outer metallic hull and of the inner metallic hull in such a way as to have the possibility of fixing to the same by means of fixed-joints both the multilayer structure made up of the set of layers having different densities with a sound-deadening function, and the multilayer structure made up of the layers having different densities and of the inner soundproofing layer.
  • a self-supporting modular, soundproofing and sound-deadening board for antinoise barriers said board comprising a first metallic hull which is exposed to the noise source, a second metallic hull performing the function of a cover, a soundproofing and sound-deadening multilayer structure which is located inside said first and second hulls, wherein said outer hull which is exposed to the noise source has, at the points corresponding to said surface, a set of staggered slits protected by projecting fins which are obtained in the metal sheet itself for decreasing the seepage of water and other atmospheric agents, said board being characterized in that said sound-deadening multilayer structure is made up of a first layer exposed to the source of noise and is made up of a light waterproof membrane which is impermeable to liquids and atmospheric agents, a second layer which is made up of a high-density porous membrane endowed with a high resistance to the passage of air, and of a third layer of a low-
  • said first layer of said sound-deadening multilayer structure is fastened to the front surface of said second layer in a frontal way.
  • An alternative embodiment of this invention provides a self-supporting, soundproofing and sound-deadening modular board for antinoise barriers, said board comprising a first metallic hull exposed to the source of noise, a second metallic hull having the function of a cover, a soundproofing, sound-deadening multilayer structure placed inside said first and second hull, wherein said outer hull which is exposed to the source of noise has, at the points corresponding to said surface, a set of staggered slits which are protected by projecting fins obtained in the barrier itself for decreasing the seapage of water and of other atmospheric agents, said board being characterized in that said soundproofing and sound-deadening multilayer structure is made up of a first layer exposed to the source of noise, and made up of an impermeable light membrane, a second layer which is made up of a high-density porous membrane, of a third layer of a low-density porous material, and of a fourth layer of a heavy, impermeable rolled layer
  • said fourth layer of said soundproofing multilayer structure is applied mechanically or it is glued to said second outer metallic hull having the function of a cover.
  • said first layer of said sound-deadening, soundproofing multilayer structure is made up of a membrane consisting of an impermeable fabric or an impermeable film based on a polyurethane, polyester, polyamide plastic material, or an aluminum film weighing between 20 and 60 g/m2, and preferably 40 g/m2.
  • said second layer of said soundproofing/sound-deadenint modular structure consisting of said high-density porous membrane is made up of fibrous tufts of the TACA-ABX type and pressed, or of mineral wool, or of a pierced plastic filme or fabric, and it should have a resistance to the flow of air of optimized value as a function of the characteristics of the third layer, the preferred values oscillating between 800 and 1,200 Rayls/m.
  • said third layer of said sound-deadening/soundproofing modular structure with a low-density porous material, as for instance TACA-ABX fibrous tufts, or mineral wool or open-cell foams as for instance polyurethane or melamine foamed material, with thicknesses ranging from 2 to 5 cm and with a specific resistance to the flow of air between 10,000 and 30,000 Rayls/m.
  • a low-density porous material as for instance TACA-ABX fibrous tufts, or mineral wool or open-cell foams as for instance polyurethane or melamine foamed material
  • said fourth layer will be realized advantageously with heavy rolled material based on bituminous or rubber matter, whose weight ranges from to 4 to 10 kg/m2.
  • stiffening materials or inserts will be put into the layer, in case the bow-type member having the function of a cover is to be strengthened.
  • the board 1 is made up schematically of a metallic hull 2 which is exposed to the source of noise and is illustrated in a more detailed way in Figure 5, and it is also made up of a back metallic hull 3 performing the function of a cover, said board being made up of a multilayer modular structure as well, said structure consisting of sound-deadening materials having differentiated densities.
  • Such multilayer structure 4 is housed and positioned in a fixed way between the hulls 2 and 3 so as not to require any further member for being fastened and so as not to reduce its own structural integrity.
  • the metallic hull 2 exposed to the source of noise has a set of slits 5 at the points corresponding to such surface, said slits being obtained by drawing in the metal sheet that makes up the hull itself, so as to reduce the seepage of water and of other atmospheric agents into the board.
  • the sound-deadening multilayer structure is made up of three different layers.
  • the first layer 7 Is made up of an impermeable, liquid-tight film, preferably made up of a polyurethane, a polyester or a polyamide material or of an aluminum film whose weight ranges between 30 and 60 g/m2, preferably 40 g/m2, said film being fastened during a process of hot-gluing to the successive second and third layers at the points corresponding to the longitudinal edges.
  • an impermeable, liquid-tight film preferably made up of a polyurethane, a polyester or a polyamide material or of an aluminum film whose weight ranges between 30 and 60 g/m2, preferably 40 g/m2, said film being fastened during a process of hot-gluing to the successive second and third layers at the points corresponding to the longitudinal edges.
  • said layer 7 is glued at some points to adjacent layer.
  • Such layer which is labelled with the reference numeral 8 in Figure 1, is made up of a high-density porous membrane, preferably in the shape of a molded or pressed mattress of the TACA-ABX type or made up of a mineral fibre fabric or of plastic materials or a pierced film of a plastic material.
  • such layer has a thickness of about 3 mm, a weight ranging from 1,000-15,000 g/m2 and a resistance to the flow of air of 800-1,200 Rayls.
  • the third layer has a lower value of density and is made up of TACA-ABX or of mineral wool or of an open-cell foamed material and its thickness varies in the range between 20 and 50 mm.
  • the layers 7, 8 and 9 are joined by means of a hot-pressing procedure.
  • said multilayer sound-deadening structure is made up also of a further layer 10 in addition to the layers 7A, 8A and 9A realized with the same materials as those already illustrated for the board 1.
  • Such configuration completed with a layer for making the containment cover heavier and sound-deadening, is employed in the cases in which a high soundproofing power is required.
  • the layer 10 which has a tray-like shaping, and inside which the low-density layer 9A is housed, is made up of heavy impermeable rolled materials consisting of a plastic or a metallic material of thickness ranging from 2 mm to 10 mm and having weights ranging from 5 to 15 kg/m2.
  • Such layer is fastened by hot gluing to the layers 7A, 8A and 9A and is fastened mechanically or glued to the inner surface of the metallic hull 3A, so as to supply the same with further stiffness and so as to increase the soundproofing effect.
  • Figure 3 shows a further kind of embodiment of the board of Figure 2 in which the low-density layer 9B is partially substituted with an air gap or jacket and in which the layer 10B is fastened mechanically to the hull 3B in order to perform its stiffening function.
  • Figure 4 represents in cross-sectional vertical view and in a non-assembled position, the profile of the metallic hull which is exposed to the noise source 2 and of the outer hull 3.
  • This last portion together with the portion 12 and also together with the inner portion of the metallic hull 2 which is exposed to the source of noise, delimits the cavity in which the sound-deadening multilayer structure 4 goes according to the design, so as to become fastened by a fixed-joint and keeping so fastened in the position delimited by said cavity and without the need for particular fastening systems.
  • the metallic hulls 2 and 3 are fastened reciprocally on the contrary at the points corresponding to the holes 13.
  • Such fixed-joint type of fastening system so designed allows, once the hull 2 is available, the sound-deadening multilayer structure 4 to be positioned on the same and then allows the assembling with the hull 3 to be completed together with the fastening of said pull with the hull 2, so fastening in the correct position the structure 4 by means of a fixed joint.
  • the shaping of the two hulls 2 and 3 is so realized as to allow a number of boards to be assembled in a set, on steel-structure work, in order to build continuous antinoise barriers.
  • An impermeable membrane made up of a waterproof or fluid impermeable fabric or of a film consisting of a plastic material: a polyurethane, a polyamide or a polyester and so on, or an aluminum film.
  • the resonance is set at frequencies of about 1,000-1,500 Hz by acting on the weight of the membrane, and this gives rise to a remarkable increase in the sound-deadening coefficient in that field of frequency, with respect to the case in which the layers II and III are only involved, and a very low loss at the high frequencies.
  • the optimal weight can vary between 20 and 60 g/m2 as a function of the thickness of the layers II and III.
  • the membrane is fastened all along the perimeter, and just partially on the surface of the underlying layers; glue lines or points at distances not lower than 5 cm are acceptable.
  • the membrane covers accurately the perimeter of all underlying porous layers in order to avoid the absorption of liquid matter due to capillarity phenomena.
  • the membrane can be realized with a pressed porous mattress having a suitable density or with a mineral fibre or plastic fibre fabric or with a pierced plastic material film having a suitable resistance to the air flow.
  • a low-density porous mattress (mineral wool or TACA ABX or an open-cell foamed material), having the following optimal characteristics:
  • the porous material can be partially or totally substituted with air or with a "honey-comb" shaped spacer of an equivalent thickness.
  • the function of the layers II and III is that of supplying a sound-deadening system having a sound-deadening coefficient higher than 0.7 in the frequency range in which the vehicle noise is maximum.
  • a heavy rolled sheet (based on a bituminous, or an elastomeric or a fibrous material) of thickness variable between 2 and 10 mm, whose functions are:

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)
  • Connection Or Junction Boxes (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
  • Building Environments (AREA)
EP92830415A 1991-08-05 1992-07-27 Schallisolierte und -schluckende modulare Platteneinheit zur Bildung von Lärmbarrieren Expired - Lifetime EP0527115B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910597 1991-08-05
ITRM910597A IT1249829B (it) 1991-08-05 1991-08-05 Elemento modulare di pannello fonoisolante e fonoassorbente per barriere antirumore

Publications (2)

Publication Number Publication Date
EP0527115A1 true EP0527115A1 (de) 1993-02-10
EP0527115B1 EP0527115B1 (de) 1995-09-06

Family

ID=11400309

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92830415A Expired - Lifetime EP0527115B1 (de) 1991-08-05 1992-07-27 Schallisolierte und -schluckende modulare Platteneinheit zur Bildung von Lärmbarrieren

Country Status (4)

Country Link
EP (1) EP0527115B1 (de)
AT (1) ATE127560T1 (de)
DE (1) DE69204601D1 (de)
IT (1) IT1249829B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704880A1 (fr) * 1993-05-07 1994-11-10 Colas Sa Dispositif de protection routière polyvalent.
FR2732382A1 (fr) * 1995-04-03 1996-10-04 Clelial Sarl Materiau a proprietes d'absorption acoustique, procede de fabrication d'un element de paroi a absorption acoustique et element de paroi resultant
EP0964108A2 (de) 1998-06-10 1999-12-15 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Verschalung
EP1148175A1 (de) 2000-04-17 2001-10-24 Tielaitos Tuotanto Lärmschutzwand
EP1295991A1 (de) * 2001-09-20 2003-03-26 Thomas Lorenz Industrietechnik Schallschutzelement
WO2003083217A1 (en) * 2002-03-25 2003-10-09 Commonwealth Industries, Inc. Sound barrier system
WO2007132964A1 (en) * 2006-05-15 2007-11-22 Ki Soung Park Soundproofing board
EP2427602A1 (de) * 2009-05-04 2012-03-14 Z-Bloc International AB Akustische abschirmungsvorrichtung zur dämpfung von verkehrslärm
CN106320196A (zh) * 2015-06-29 2017-01-11 宜兴市昊诚环保科技有限公司 一种新型中空背板式隔声屏
EP4053337A1 (de) * 2021-03-05 2022-09-07 KRAIBURG STRAIL GmbH & Co. KG Schalldämmwandelement für eine gleisanlage
WO2023227302A1 (de) * 2022-05-25 2023-11-30 KRAIBURG STRAIL GmbH & Co. KG Schalldämmwandelement für eine gleisanlage

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302413B (de) *
DE2321676A1 (de) * 1973-04-28 1974-11-21 Bayer Ag Schallschutzwand aus gummi-verbundwerkstoffen
DD116487A5 (de) * 1973-12-05 1975-11-20
FR2462522A1 (fr) * 1979-07-27 1981-02-13 Scal Gp Condit Aluminium Panneau d'isolation acoustique industrielle
DE2929853A1 (de) * 1979-07-24 1981-02-19 Rheinhold & Mahla Gmbh Laermschutzelement
CH672932A5 (en) * 1987-07-28 1990-01-15 Montana Stahl Ag Noise-attenuating wall section - contains insulating layers of different densities, with first layer held clear of front wall by distance piece
EP0368135A1 (de) * 1988-11-07 1990-05-16 Luigi Menichini Modulschalldämmendes Element, insbesondere zur Abgrenzung von Schallquellen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302413B (de) *
DE2321676A1 (de) * 1973-04-28 1974-11-21 Bayer Ag Schallschutzwand aus gummi-verbundwerkstoffen
DD116487A5 (de) * 1973-12-05 1975-11-20
DE2929853A1 (de) * 1979-07-24 1981-02-19 Rheinhold & Mahla Gmbh Laermschutzelement
FR2462522A1 (fr) * 1979-07-27 1981-02-13 Scal Gp Condit Aluminium Panneau d'isolation acoustique industrielle
CH672932A5 (en) * 1987-07-28 1990-01-15 Montana Stahl Ag Noise-attenuating wall section - contains insulating layers of different densities, with first layer held clear of front wall by distance piece
EP0368135A1 (de) * 1988-11-07 1990-05-16 Luigi Menichini Modulschalldämmendes Element, insbesondere zur Abgrenzung von Schallquellen

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2704880A1 (fr) * 1993-05-07 1994-11-10 Colas Sa Dispositif de protection routière polyvalent.
BE1007984A5 (fr) * 1993-05-07 1995-12-05 Colas Sa Dispositif de protection routiere polyvalent.
FR2732382A1 (fr) * 1995-04-03 1996-10-04 Clelial Sarl Materiau a proprietes d'absorption acoustique, procede de fabrication d'un element de paroi a absorption acoustique et element de paroi resultant
EP0964108A2 (de) 1998-06-10 1999-12-15 ALOIS SCHEUCH GESELLSCHAFT m.b.H. Verschalung
AT406917B (de) * 1998-06-10 2000-10-25 Scheuch Alois Gmbh Verschalung
EP1148175A1 (de) 2000-04-17 2001-10-24 Tielaitos Tuotanto Lärmschutzwand
EP1295991A1 (de) * 2001-09-20 2003-03-26 Thomas Lorenz Industrietechnik Schallschutzelement
WO2003083217A1 (en) * 2002-03-25 2003-10-09 Commonwealth Industries, Inc. Sound barrier system
US6827179B2 (en) 2002-03-25 2004-12-07 Commonwealth Industries, Inc. Sound barrier system
WO2007132964A1 (en) * 2006-05-15 2007-11-22 Ki Soung Park Soundproofing board
EP2427602A1 (de) * 2009-05-04 2012-03-14 Z-Bloc International AB Akustische abschirmungsvorrichtung zur dämpfung von verkehrslärm
EP2427602A4 (de) * 2009-05-04 2015-04-08 Bloc Internat Ab Z Akustische abschirmungsvorrichtung zur dämpfung von verkehrslärm
CN106320196A (zh) * 2015-06-29 2017-01-11 宜兴市昊诚环保科技有限公司 一种新型中空背板式隔声屏
EP4053337A1 (de) * 2021-03-05 2022-09-07 KRAIBURG STRAIL GmbH & Co. KG Schalldämmwandelement für eine gleisanlage
WO2023227302A1 (de) * 2022-05-25 2023-11-30 KRAIBURG STRAIL GmbH & Co. KG Schalldämmwandelement für eine gleisanlage

Also Published As

Publication number Publication date
ATE127560T1 (de) 1995-09-15
DE69204601D1 (de) 1995-10-12
ITRM910597A1 (it) 1993-02-05
IT1249829B (it) 1995-03-28
EP0527115B1 (de) 1995-09-06
ITRM910597A0 (it) 1991-08-05

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