EP2415933B1 - Noise insulation device for rail - Google Patents

Noise insulation device for rail Download PDF

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Publication number
EP2415933B1
EP2415933B1 EP10758579.6A EP10758579A EP2415933B1 EP 2415933 B1 EP2415933 B1 EP 2415933B1 EP 10758579 A EP10758579 A EP 10758579A EP 2415933 B1 EP2415933 B1 EP 2415933B1
Authority
EP
European Patent Office
Prior art keywords
soundproof
cover
rail
covers
overlapped
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
Application number
EP10758579.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2415933A4 (en
EP2415933A1 (en
Inventor
Yoshifumi Matsuda
Takashi Oguchi
Hiroyuki Abe
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Publication of EP2415933A1 publication Critical patent/EP2415933A1/en
Publication of EP2415933A4 publication Critical patent/EP2415933A4/en
Application granted granted Critical
Publication of EP2415933B1 publication Critical patent/EP2415933B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
    • E01B19/003—Means for reducing the development or propagation of noise

Definitions

  • the present invention relates to a soundproof device for rails configured to prevent noise generated from railroad rails.
  • This soundproof device has a configuration as shown in Fig. 11 including three first to third rail ties S (only the second rail tie is illustrated) configured to fix a rail R arranged in sequence from one end to the other end of the rail in the longitudinal direction, a first soundproof cover 81 bridged between the first and second rail ties S, and a second soundproof cover 82 bridged between the second and third rail ties S, in which the length of the first soundproof cover 81 matches a pitch between the first and second rail ties, the length of the second soundproof cover 82 matches a pitch between the second and third rail ties, and required portions of a rail surface are covered with the first soundproof cover 81 and the second soundproof cover 82 in a state of forming a abutting portion 83 between opposed end surfaces of the first soundproof cover 81 and the second soundproof cover 82 on the second rail tie 2.
  • a soundproof device for rails includes: three first to third rail ties configured to fix a rail arranged in sequence from one end to the other end of the rail in the longitudinal direction, a first soundproof cover bridged between the first and second rail ties, and a second soundproof cover bridged between the second and third rail ties, and the respective soundproof covers have a fixed length which is longer than any of a pitch of the first and second rail ties and a pitch of the second and third rail ties, and required portions of a rail surface are covered with the first soundproof cover and the second soundproof cover in a state in which opposed end portions of the first soundproof cover and the second soundproof cover are overlapped with each other over a required width on the second rail tie.
  • the soundproof device for rails in the present invention since a single type of soundproof covers having a larger length than a rail tie pitch are used and the opposed end portions of the adjacent two soundproof covers are overlapped with each other by an extent corresponding to the difference in length, the required portions of the rail surface can be covered entirely without forming a clearance between the opposed end surfaces of the adjacent two soundproof covers.
  • the soundproof covers each include a cover body bridged from an upper end of a side surface of the waist portion to an extremity of an upper surface of the bottom portion, and a sound absorbing material bonded on an inner surface of the cover body, and a portion of the sound absorbing materials of the respective soundproof covers are removed so that only the cover bodies of the respective soundproof covers are overlapped with each other at a portion where the first soundproof cover and the second sound proof cover are overlapped with each other, the cover bodies only having relatively small thickness can be overlapped with each other with high degree of workability without being interfered by the sound absorbing material having a relatively large thickness at the overlapped portion of the soundproof cover.
  • the sound absorbing material is obtained by causing the resin to foam.
  • the resin polyethylene resin, EPDM, polypropylene resin, and polyvinyl chloride resin are exemplified.
  • a noise reduction effect in a range from 500 to 3.15 kHz which affects the noise level much when the train passes therethrough is achieved significantly.
  • a foaming magnification of 10 to 40 specifically a foaming magnification of 15 to 30 are preferable in view of soundproof property and workability.
  • a continuous cell ratio of 90% or higher, and a compression stress (25%) of 3 to 5 kPa are preferable.
  • the soundproof covers each include a side cover covering the side surface of the waist portion and the upper surface of the bottom portion, and a bottom cover covering the bottom surface of the rail so as to continue from a lower end of the side cover, a large surface area from the side surface of the waist portion of the rail to a lower surface of the bottom portion is covered with the soundproof cover, further soundproof effect can be expected.
  • a soundproof device for rails which does not require preparation of a number of soundproof covers having different lengths, and achieves effective prevention of the noise using a single type of soundproof covers having the same length.
  • a rail R includes a top portion Rt, a waist portion Rw, and a bottom portion Rb continuing from top to bottom in sequence.
  • Portions from both left and right surfaces of the waist portion Rw to a top surface of the bottom portion Rb are covered with a pair of left and right soundproof covers 11.
  • the both soundproof covers 11 have the same structure although being mirror reversed.
  • the respective soundproof covers 11 each include a cover body 11A formed of a steel plate bridged from the upper end of a side surface of the waist portion Rw to an extremity of an upper surface of the bottom portion Rb, a thin damping resin damping material 21 and a thick formed resin sound absorbing material 22 bonded on an inner surface of the cover body 11A.
  • Fig. 2 shows a state of installation of the soundproof cover 11.
  • Three first to third rail ties S1 to S3 are laid down in sequence from the left side to the right side, and the rail R extending in the lateral direction is supported thereby.
  • the rail R is fixed onto the respective first to third rail ties S1 to S3 with tightening members T.
  • a first soundproof cover 31 is bridged between the first and second rail ties S1, S2, and a second soundproof cover 32 is bridged between the second and third rail ties S2, S3.
  • a first pitch P1 between the first and second rail ties S1, S2 and a second pitch P2 between the second and third rail ties S2, S3 are the same or the latter is larger than the former.
  • the length L of the first soundproof cover 31 and the second soundproof cover 32 is the same. These sizes have a relationship; P1 ⁇ P2 ⁇ L.
  • An overlapped portion 33 is formed at a right end portion of the first soundproof cover 31 and a left end portion of the second soundproof cover 32 on the second rail tie S2, where both are overlapped with each other over a required width B.
  • the width B of the overlapped portion 33 is on the order of 20 to 80 mm, according to the invention and, preferably, 50 mm considering variations in tie pitch and soundproof performance. If it is smaller than 20 mm, when the tie pitch varies significantly, the width of variations become larger than the overlapped portion 33, so that a clearance may be formed and a sound absorbing effect is lowered. If it exceeds 80 mm, the overlapped portion 33 is large, and hence a large amount of the sound absorbing material 22 must be removed, whereby the sound absorbing effect is lowered.
  • damping materials 21 and the sound absorbing materials 22 of the respective soundproof covers 31, 32 are removed so that only the cover bodies (not shown) of the respective soundproof covers 31, 32 are overlapped at the overlapped portion 33 of the right end portion of the first soundproof cover 31 and the second soundproof cover 32.
  • Fig. 3 shows a modification of a soundproof cover 41.
  • the soundproof cover 41 in this modification includes side covers 42 and a bottom cover 43 formed integrally as a whole.
  • the side covers 42 have basically the same structure as the soundproof covers 41 shown in Fig. 1 , and each include a side cover body 42A formed of a steel plate bridged from the upper end of the side surface of the waist portion Rw to the extremity of the upper surface of the bottom portion Rb, and a damping resin damping material 51 and a foamed resin sound absorbing material 52 bonded on the inner surface of the side cover body 42A.
  • the bottom cover 43 includes a bottom cover body 43A formed of a steel plate aligned at an upper end thereof with a lower end of the side cover body 42A and having a L-shape in lateral cross section, and a damping resin damping material 53 and a foamed resin sound absorbing material 54 bonded on an upper surface of a horizontal portion thereof.
  • the soundproof covers 41 in this modification includes an overlapped portion 61 formed on a single rail tie S by opposed end portions of the two adjacent soundproof covers 41 as shown in Fig 4 .
  • the side cover 42 is formed with notches 71, 72 in the same manner as the notches 31a, 32a shown in Fig. 2 .
  • the bottom cover 43 is formed with notches 73, 74 for avoiding interference with the rail tie S.
  • the method of measurement will be as follows.
  • the 50N rail R with a tie span of 600 mm is oscillated by pink noise fed from an oscillation speaker.
  • a microphone is placed at a position of 100 mm from the waist portion Rw of the rail R at a position of 2 m apart from a shaking point, and then the noise level is measured.
  • the soundproof effect is calculated by subtracting a sound pressure level of the rail R provided with the cover from a sound pressure level of the naked rail R, which is the rail R not provided with the cover.
  • Fig. 5 and Fig. 6 show the results of the measurement.
  • Fig. 5 shows total average values of the sound pressure in a range from 400 to 4kHz
  • Fig. 6 shows sound pressures at frequencies in a range from 400 to 4kHz, respectively.
  • a sign a represents a case where there is no clearance between the covers as shown in Fig. 7
  • a sign b represents a case where there is a clearance between the covers as shown in Fig. 8
  • a sign c represents a case where end portions of the covers are overlapped with each other as shown in Fig. 1
  • a sign d represents a case where a bottom surface of the rail R is covered with the cover as shown in Fig. 3 in addition to the covered surface shown by the sign c, respectively.
  • the sound pressure reduction effect is the lowest.
  • the sound pressure reduction effect is achieved by the same extent.
  • the fact that the sound pressure reduction effect is higher when the bottom surface of the rail R is covered with the cover is as shown by the sign d.
  • the cover body described above is not limited to be formed of the steel plate, but may be formed of resin. However, when the covers are abutted without clearance therebetween as shown by the sign a as described above, there is a probability of formation of the clearance due to the thermal contraction of the rail. In this case, the sound pressure reduction effect may be lowered.
  • Fig. 7 shows test conditions. Measured data of the sound reduction effect in a laboratory using the resins under the conditions shown in Fig. 7 is shown in Fig. 8 .
  • Fig. 9 shows sound measurement data measured when a train is actually passed therethrough using the resins under the same conditions.
  • Fig. 10 shows a result of simulation of the sound pressure reduction effects of the above-described various resins from the sound pressure levels when the train is passed therethrough using the data shown in Fig. 8 and Fig. 9 .
  • any of Fig. 8 to Fig. 10 it is understood that the soundproof performance of the sound absorbing material, polyethylene resin having a cell diameter of 0.5 to 1 mm and a foaming magnification of 30 is superior.
  • notches as a runout for the tightening member may be formed by on-the-spot adjustment on the spot of execution or may be formed in advance.
  • execution of the soundproof covers may be performed for the rails without being affected by a change of the tie pitch.
  • the soundproof covers can be prepared without being bound by the notches. Therefore, the soundproof covers having a length longer than the tie pitch can easily be used, and hence the workability is improved.
  • urethane foamed material or the like may be injected into clearances between the overlapped portion 33 of the soundproof covers and the rail R (positions where the sound absorbing materials 22 are omitted), whereby the sound absorbing effect can be enhanced by filling the clearances.
  • the soundproof device for rails according to the present invention does not require preparation of a number of soundproof covers having different lengths, and achieve the effective prevention of the noise using a single type of soundproof covers having the same length.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Railway Tracks (AREA)
EP10758579.6A 2009-04-03 2010-03-26 Noise insulation device for rail Active EP2415933B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009090649A JP5185877B2 (ja) 2009-04-03 2009-04-03 レールの防音装置
PCT/JP2010/055405 WO2010113807A1 (ja) 2009-04-03 2010-03-26 レールの防音装置

Publications (3)

Publication Number Publication Date
EP2415933A1 EP2415933A1 (en) 2012-02-08
EP2415933A4 EP2415933A4 (en) 2014-04-02
EP2415933B1 true EP2415933B1 (en) 2017-10-25

Family

ID=42828098

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10758579.6A Active EP2415933B1 (en) 2009-04-03 2010-03-26 Noise insulation device for rail

Country Status (4)

Country Link
EP (1) EP2415933B1 (zh)
JP (1) JP5185877B2 (zh)
CN (1) CN102187035B (zh)
WO (1) WO2010113807A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2770107B1 (en) * 2011-10-17 2017-11-08 Sekisui Chemical Co., Ltd. Noise insulation device for rail and method of attaching same
JP5852477B2 (ja) * 2012-03-07 2016-02-03 積水化学工業株式会社 レールの防音装置
CN103343496B (zh) 2013-07-10 2016-06-08 铁道第三勘察设计院集团有限公司 一种轨道吸振器
JP6475476B2 (ja) * 2014-11-18 2019-02-27 積水化学工業株式会社 レールの防音装置
DE102016217852B4 (de) 2016-09-19 2018-04-26 Günther Veit Schallisolationsvorrichtung für Schienen und entsprechende Anordnung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4036124A1 (de) * 1990-10-29 1992-04-30 Schwartz Heinz Vorrichtung fuer die reduzierung von schallenergie am verkehrssystem rad/schiene
WO1993001354A1 (de) * 1991-07-11 1993-01-21 Jenbacher Transportsysteme Aktiengesellschaft Lärmschutzvorrichtung für eisenbahngleise
DE10045001A1 (de) * 2000-09-11 2002-04-04 Johann Resch Schienenstegbedämpfung
CN2692194Y (zh) * 2003-12-19 2005-04-13 钱国桢 一种用于道轨的消音套
JP4280206B2 (ja) * 2004-06-17 2009-06-17 財団法人鉄道総合技術研究所 レールの防音構造
JP4921833B2 (ja) * 2005-08-30 2012-04-25 積水化学工業株式会社 レールの防音装置
JP4695487B2 (ja) * 2005-10-25 2011-06-08 財団法人鉄道総合技術研究所 レールの防音構造
JP5156209B2 (ja) * 2006-09-07 2013-03-06 積水化学工業株式会社 レールの防音装置
CN1928235B (zh) * 2006-09-21 2011-02-09 尹学军 减振轨道

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2415933A4 (en) 2014-04-02
CN102187035A (zh) 2011-09-14
CN102187035B (zh) 2012-12-26
JP5185877B2 (ja) 2013-04-17
EP2415933A1 (en) 2012-02-08
WO2010113807A1 (ja) 2010-10-07
JP2010242337A (ja) 2010-10-28

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