公路陸橋噪音模式之研究

Abstract

立體交叉型式的公路陸橋往往是路政單位解決交通瓶頸的方策之一，但由 於公路陸橋結構的物理特性，造成了附近居民出入作息商業行為甚至，隱 私權都受到嚴重的干擾與排斥，尤其陸橋的高度變化，影響了駕駛行為的 改變，也就影響了噪音量的變化，因此，種種因素的關連，更突顯了陸橋 噪音問題的可研究性，是故，本研究特以陸橋結構因素考量，並將實例噪 音量資料予以經驗值乎差後導出公路陸橋噪音模式，利用本模式，在輸入 陸橋結構資料及交通資料(各車種各方向之流量及平均車速)後，可迅速推 得陸橋上任一點之平面、縱斷面、橫斷面等之噪音等音壓線圖，對於陸橋 沿線附近各點的噪音分佈狀態當能有所了解，而對陸橋防音的研究上也應 有所參考價值。 Grade Separation Bridge is usually one of the ways adopted by Highway Administration to resolve traffic bottlenecks. But due to the physical feature of the bridge structure, the citizen living close to bridges are seriously interfered in their daily life, commercial behavior and even privacy. Especially, the height variation of bridges influences on the changes of driving behavior, so noice volumn is varied simultane- ously. Therefore, because of the relations of various factors, the noise problem of bridge reveals more specifically its lity. This research is done especiall according to the of bridge structure. After figuring out the mean deviation of experience value about real cases noise volumn data, we will able to use the bridge noise model led to infer and get the chart of equal equivalent sound pressure leuel of the horizontal, vertical section and cross section at any point of the bridge by inputting bridge structure data and traffic data.( including all kinds of vehicles, their volumn in all directions and aeverage speed) To do so, we will be able to understand the distribution state of all points along the bridge nearby. Besides, it also could provide the reference value in noiseproof.