高鐵列車引致地盤振動之遠域影響範圍評估

魏碩賢

doi:10.6840/CYCU.2014.00081、10.6840/cycu201400085

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高鐵列車引致地盤振動之遠域影響範圍評估

Evaluation of Influence Distance of Ground Vibration by High-Speed Trains

魏碩賢 , Masters　　Advisor：陳逸駿　　

繁體中文 DOI： 10.6840/CYCU.2014.00081、10.6840/cycu201400085

路堤；地盤振動；衰減係數；橋梁；高速鐵路；影響距離； Ground vibration ； Bridges ； Influence distance. ； Embankments ； Attenuation coefficient ； High-speed trains

Abstract │ Reference (53) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

ABSTRACT
This study used the vibration measurement data to evaluate the vibration attenuation coefficient (α) and influence distance (D) for Taiwan high-speed trains on embankments, bridge with shallow foundations, and bridge with deep foundations. All possible influence factors, including train speed, structure volume, soil type, ground shear wave velocity (Vs), and frequency dependence are further explored in the study. To observe the impact of background vibration, analysis methods consist of original vibration data, net vibration data, and the correction vibration data by Japanese specifications. The related vibration characteristics induced by high-speed trains were also discussed.
Analysis results show that the method by Japanese specification’s correction data has the larger variation in the attenuation coefficient and influence distance. Therefore, it is not suitable as a basis for ground vibration assessment. On the other hand, the methods of original vibration data and net vibration data present more reliable and reasonable results.
For the evaluation of attenuation coefficient (α), the attenuation coefficient of overall vibration for embankments using original vibration data and net vibration data is in the range of 1.2~3.8 (10-3/m) and 3.3~7.9 (10-3/m), respectively. The α value for bridge with shallow foundations using original vibration data and net vibration data is in the range of 1.8~2.9 (10-3/m) and 4.2~8.8 (10-3/m), respectively, and bridge with deep foundations is in the range of 0.9~1.9 (10-3/m) and 2.4~6.3 (10-3/m), respectively. Embankments and shallow foundations present consistent result and the α value decreases with increasing Vs. But, the trend of deep foundations is different with embankments and shallow foundations.
For the evaluation of influence distance, the factors of train speed, ground shear wave velocity, and frequency dependence were analyzed. The influence distance of overall vibration for embankments using the original vibration data and net vibration data is in the range of 172~306 m and 273~811 m, respectively. The influence distance for bridge with shallow foundations using original vibration data and net vibration data is in the range of 151~338 m and 306~698 m, respectively, and bridge with deep foundations is in the range of 194~475 m and 414~1280 m, respectively. For the factor of train speed, embankments and deep foundations present consistent result and the influence distance increase with increasing train speed. But the trend of shallow foundations is different. For the factor of ground shear wave velocity, embankments and shallow foundations present consistent result and the influence distance increase with increasing Vs. But, the trend of deep foundations is different.
  The attenuation coefficient and influence distance were also analyzed using 21 frequencies for the 1/3 octave band. The maximum attenuation coefficient happens at 63~100 Hz, 25 Hz and 63 Hz, and 40~63 Hz for embankments, shallow foundations, and deep foundations, respectively. For all structures of high-speed trains, the influence distance becomes smaller when the frequency of the 1/3 octave band increases.

Reference ( 53 ) 〈TOP〉

6. 沈怡君、顏彬任、倪勝火，「高速鐵路引致地盤振動之地工防治對策討論」，地工技術，第88期，第15-22頁，2001。
連結：
9. 楊智幃，「捷運列車引致土層振動與衰減特性之研究」，碩士論文，國立成功大學土木工程研究所，台南，2002。
連結：
10. 黃俊鴻、李建中、莊家瑄，「打樁振動對建築結構物影響之評估」，中國土木水利工程學刊，第十五卷，第四期，第631-641頁，2003。
連結：
12. 黃宗宸，「南科園區高鐵沿線道路鋪面與排水溝渠之減振成效分析」，碩士論文，國立台灣大學，台北，2004。
連結：
13. 張德文、鄭世豪、段永定、梁尹齡，「高鐵橋梁基礎和鄰近地表振動反應分析」，2005兩岸鐵道工程技術與營運管理學術研討會論文集，台灣，淡水，第233-252頁，2005。
連結：

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