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
  • 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
• • 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
  • E01F8/0029—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with porous surfaces, e.g. concrete with porous fillers

Definitions

• the subject of the invention is an acoustic baffle, especially for placement in the railway zone, and escape stairs for the acoustic baffle, for the use along rail communication routes, especially for rapid rail traction.
• Rail vehicle consisting of a series of cars, when travelling with large speeds is a source of noise, caused by air flowing over it and by undercarriage trucks travelling over the rails, mainly the contact of wheels with the rails.
• baffles the height of which is basically equal to the lower edge of the car are allowed, whereas the closer to the car the baffle is located, the more efficient it is at dissipating and absorbing the sound.
• German patent description DE 3934489 presents a solution in which, on the concrete support from the side of the railway a lengthwise, shaped absorption panel was mounted.
• the panel is made of a uniform material, usually mineral wool, modularly shaped and placed in frames with a stiffening latticework, which is mounted to the support structure.
• the uniform material of the panel has a low acoustic insulation value and is not durable, due to humidity, pollution, mechanical intrusion by insects and birds, has low stiffness, which requires the use of stiff frames and latticework.
• this panel In order to achieve proper acoustic parameters, this panel has to have appropriate thickness. This causes difficulties in transport, requires the use of connectors with a special structure, mounting the panel to support elements of the acoustic baffle.
• the essence of the invention which is an acoustic baffle, especially for placement in the railway zone, in the form of a set of panels placed on supports, forming a shaped block, with envelope walls, having a front and rear wall, between which a layer of insulation material is placed, consists of a panel having a main surface, the cross section of which is the plane perpendicular to its lengthwise axis forms a curved shape and with a top edge situated approximately at the height of the lower edge of the car body, and placed on at least three supports connected to the pipe which is mounted on the head of a pile (micropile) parallel to the axis of the rails.
• a pile micropile
• a sole plate made of epoxy resins is attached, advantageously in the shape of a reverse "U" letter in a cross section in a plane perpendicular to its lengthwise axis. It is also advantageous when every of the supports has a screw length adjusters.
• the front wall of the panel is a perforated net, advantageously made of aluminium sheeting
• the rear wall is made from a shaped sheet of alloyed steel, which on the internal side is covered by a layer of quartz sand with a diameter of grains in the range of (1-3) mm, mixed with a synthetic epoxy, moreover between the layer of sand mixture and the front wall a mineral wool layer (14) is placed, with a thickness of (30 - 70) mm, advantageously 50 mm and thickness (100 - 150) kg/m3, advantageously 120 kg/m3, having from the perforated side a humidity protection layer.
• the front wall of the panel is a plane.
• the baffle has stairs, in order to evacuate persons from the railway zone, according to the invention, the essence of which consists of them being formed by two shaped plates, between which steps are mounted, connected with a rear wall, to which a support with installed escape steps is mounted, connected with the main pipe.
• a sole plate is attached to the base of the stairs, in the shape of a lengthwise profile, with a profile similar to the letter "U” in the plane perpendicular to the lengthwise axis.
• the stairs behind the entrance steps have a perforated aluminium wall, behind which, in the shape between the net and the rear wall and side walls sound insulation material is placed.
• Fig. 1 the baffle was presented in the railway zone
• Fig. 2 the panel supports for the implementation of the panel rotation were presented in a rest position
• Fig. 3 panel supports for the implementation of the panel rotation were presented in a raised panel position
• Fig. 4 a panel was shown in the cross section in a plane perpendicular to its main surface and in a parallel perspective
• Fig. 5 the stairs were shown in operational position
• Fig. 6 a view of supports and main pipe is shown.
• the acoustic baffle has a panel J_, having the main surface 2 the cross section of which in the plane perpendicular to its lengthwise axis forms a curved shape. Its edge is situated approximately at the height of the lower edge of the car body, not shown on the drawing. 1_ is placed on supports, lower 3 and upper 4, fixed to the pipe 6. Pipe 6 is mounted on piles (micropiles) 7, perpendicular to the axis of the rails. To the lower edge of the panel i a sole plate 8 made of epoxy resins is attached, in the shape of a reverse "U" letter in a cross section in a plane perpendicular to its lengthwise axis. Each of the 3, 4 supports has screw length adjusters 9.
• Piles (micropiles) 7 are installed in established distances along the railway, outside of the exclusion zone.
• the support structure 17 for the main pipe 6 is supported on piles (micropiles) 7.
• piles (micropiles) 7 To lower envelope wall of the panel i of the acoustic baffle sole plate 8 is mounted, made of epoxy resin based materials. Over the piles the pipe 6 is placed with the support structure 7. Then the length of supports 3 and 4 is changed with adjusters 9, in order to obtain appropriately vertical placement of the rear wall of the panel 1_, after which the panel 1 is mounted to the supports 3, 4, and the structure is connected to the hydraulic actuator J_L
• the panel 1 has a front wall 2, which is a perforated net, advantageously made of aluminium sheeting, whereas the rear wall is made from a shaped sheet of alloyed steel.
• the sheet on the internal side is covered by a layer of quartz sand with a diameter of grains in the range of (1-3) mm, mixed with a synthetic epoxy.
• a layer of mineral wool 14 is placed between the sand mixture layer 13 and the front wall 2 with a thickness of (30 - 70) mm, advantageously 50 mm and density of (100 - 150) kg/m3, advantageously 120 kg/m3, having from the perforated side a humidity protection layer 1_5.
• Stairs 20 for evacuation of personnel from the railway zone consist of two shaped side plates 21 , between which steps 22 are placed.
• Side plates 2J_ are connected to the rear wall 23, to which a support is mounted with installed steps 24.
• steps 24 There are versions, where on the descent side to the steps 24 protective barriers 25 are mounted.
• a sole plate 8 is attached to the base in the entrance zone, in the shape of a lengthwise profile, with a profile similar to the letter "U” in the plane perpendicular to the lengthwise axis.
• the sound insulation material J_3, 1_4, J_5 and 27 attenuates the sound and eliminates the refraction of waves, which would increase the noise.
• the stairs 20 are based on its own sole plate 8 or on an extended sole plate 8 of the adjacent panels 1 of the acoustic baffle.
• the person located in the hazardous zone may very easily move over the stairs 20 and go over to the other side of panels L
• hydraulic installation is turned on, which uses the actuator JJ_ to raise the panel I and stairs 2 ⁇ and rotates them around the axis of the pipe 6.

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Citations (15)

• 2012
  • 2012-01-30 EP EP12709711.1A patent/EP2670912A1/en not_active Withdrawn
  • 2012-01-30 WO PCT/PL2012/000006 patent/WO2012105860A1/en active Application Filing

Patent Citations (15)

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