A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
VIADUCT AND NOISE REDUCTION DEVICE
To provide a viaduct and a noise reduction device that can reduce the noise radiated from the floor opening of the bridge along the railway line with a simple structure.SOLUTION: A viaduct 4 is provided with a floor opening 4d. A sound-proof wall 3 is installed between the side of a track 1 and the side of a railway line so as to attenuate the noise from a sound source. A noise passing portion 7 is a portion having a predetermined length through which noise from the sound source passes from the floor opening 4d toward a lower space S. A sound absorbing portion absorbs the noise passing through a noise passing portion 7 on the inner surface of the noise passing portion 7. Of the noise from the sound source, the noise entering an entrance 7b of the noise passing portion 7 from the floor opening 4d is reflected in a multiplexing manner in a passage 7a of the noise passing portion 7 and absorbed by the sound absorbing portion in the passage 7a. Of the noise from the sound source, the noise toward a sound-proof wall 3 is reduced by being insulated by the sound-proof wall 3.SELECTED DRAWING: Figure 2
【課題】簡単な構造によって橋梁の床開口部から沿線に放射する騒音を低減することができる高架橋及び騒音低減装置を提供する。【解決手段】高架橋４は、床開口部４ｄを備えている。防音壁３は、軌道１側と沿線側との間に設置されており、音源からの騒音を減衰させる。騒音通過部７は、床開口部４ｄから下空間Ｓに向かって、音源からの騒音が通過する所定長さの部分である。吸音部は、騒音通過部７を通過する騒音をこの騒音通過部７の内面で吸収する。音源からの騒音のうち床開口部４ｄから騒音通過部７の進入口７ｂに進入する騒音が、この騒音通過部７の通路７ａ内で多重反射するとともに、この通路７ａ内の吸音部によって吸収される。音源からの騒音のうち防音壁３に向かう騒音が防音壁３に遮音されて低減する。【選択図】図２
VIADUCT AND NOISE REDUCTION DEVICE
To provide a viaduct and a noise reduction device that can reduce the noise radiated from the floor opening of the bridge along the railway line with a simple structure.SOLUTION: A viaduct 4 is provided with a floor opening 4d. A sound-proof wall 3 is installed between the side of a track 1 and the side of a railway line so as to attenuate the noise from a sound source. A noise passing portion 7 is a portion having a predetermined length through which noise from the sound source passes from the floor opening 4d toward a lower space S. A sound absorbing portion absorbs the noise passing through a noise passing portion 7 on the inner surface of the noise passing portion 7. Of the noise from the sound source, the noise entering an entrance 7b of the noise passing portion 7 from the floor opening 4d is reflected in a multiplexing manner in a passage 7a of the noise passing portion 7 and absorbed by the sound absorbing portion in the passage 7a. Of the noise from the sound source, the noise toward a sound-proof wall 3 is reduced by being insulated by the sound-proof wall 3.SELECTED DRAWING: Figure 2
【課題】簡単な構造によって橋梁の床開口部から沿線に放射する騒音を低減することができる高架橋及び騒音低減装置を提供する。【解決手段】高架橋４は、床開口部４ｄを備えている。防音壁３は、軌道１側と沿線側との間に設置されており、音源からの騒音を減衰させる。騒音通過部７は、床開口部４ｄから下空間Ｓに向かって、音源からの騒音が通過する所定長さの部分である。吸音部は、騒音通過部７を通過する騒音をこの騒音通過部７の内面で吸収する。音源からの騒音のうち床開口部４ｄから騒音通過部７の進入口７ｂに進入する騒音が、この騒音通過部７の通路７ａ内で多重反射するとともに、この通路７ａ内の吸音部によって吸収される。音源からの騒音のうち防音壁３に向かう騒音が防音壁３に遮音されて低減する。【選択図】図２
VIADUCT AND NOISE REDUCTION DEVICE
高架橋及び騒音低減装置
OGATA YUKIE (author) / KITAGAWA TOSHIKI (author) / UDA TOKI (author) / MURATA KO (author)
2020-12-24
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
/
E01B
PERMANENT WAY
,
Gleisoberbau
/
E01F
ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
,
Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl.
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