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【土木学会舗装工学論文集 第11集 2006年12月】 |
舗装工学論文集 Vol.11, pp.41-47, 2006.12 |
小林昭則 1 ・平川一成2 ・島広志3 ・丸山暉彦4
ゴム弾性舗装は，従来の排水性舗装より高い騒音低減効果が得られ，その騒音低減効果は，舗装体の吸音性，軟らかさ，衝撃吸収性およびこれらに影響を及ぼす舗装厚等に影響を受けると考えられる．今回，車両走行騒音，ショッピングカート騒音に及ぼす要因として後者の”衝撃吸収性”を取りあげ，室内試験ではゴム弾性舗装の衝撃加速度とタイヤ落下衝突音について，試験施工では衝撃加速度と普通車騒音および静的ばね定数とショッピングカート振動との関連について検討した．その結果，ゴム弾性舗装の衝撃加速度および静的ばね定数は，車両走行騒音やショッピングカート振動と密接な関係にあることを確認した．
Key
Words:rubber elastic pavements, elasticity, spring constant, impulsive acceleration, tire/road noise Akinori KOBAYASHI, Kazunari HIRAKAWA, Hiroshi SHIMA and Teruhiko MARUYAMA
As for the rubber elastic pavement, a high noise reduction effect is provided than conventional porous pa vement, and what can largely reduce the tire/road noise at the time of a low speed run and the shopping cart noise is found. It is thought that noise reduction effect of rubber elastic pavement is affected by noise absorption characteristics, thickness, the elasticity, impulsive relaxation characteristics of a pavement. In this study, it was examined the influence that the static spring constant as the elastic softness and the im pulsive acceleration as impulsive relaxation characteristics of rubber elastic pavement gave to the vehicle tire/road noise and the shopping cart noise. As a results, it was found that the static spring constant and the impulsive acceleration of rubber elastic pavement were related to influence on reduction characteristics of the vehicle tire/road noise and the shopping cart noise.
1正会員大成ロテック(株)生産技術本部技術部(〒365-0027鴻巣市上谷1456)
2正会員工修大成ロテック(株)生産技術本部技術研究所(〒365-0027鴻巣市上谷1456)
3正会員博(工)(株)ブリヂストン研究開発本部(〒187-8531小平市小川東町3-1-1)
4正会員工博長岡技術科学大学環境・建設系教授(〒940-2188長岡市上富岡町1603-1)
A STUDY ON THE RELATIONSHIP BETWEEN REDUCTION OF TIRE/ROAD NOISE AND ELASTICITY OF RUBBER ELASTIC PAVEMENTS