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  • 學位論文

高速鐵路引致地盤振動之簡易預測模式研究

A prediction method of ground vibration for Taiwan high-speed rail

指導教授 : 陳逸駿

摘要


本研究經由對台灣高速鐵路之振動量測資料,探討其於橋樑及路堤結構引致之地盤振動特徵,包括近域之基準位置振動量、遠域振動衰減係數及影響距離。這些振動特徵之探討包括不同之影響因子,如車速、土層狀況、基礎型式、頻率因素及結構體積等。最後藉由這些近域及遠域之振動特徵評估分析,建立一套適合於台灣高速鐵路行駛於橋樑及路堤之預測模式。 在近域振動量之評估,首先不論結構型式為橋樑或路堤,振動量均隨著列車速度的增加而增大。於橋樑結構之車速160~300 km/hr,整體振動量介於53~72 dB之間,且淺基礎之振動量有大於深基礎之趨勢。路堤於車速150~300 km/hr,振動量為52~71 dB之間。橋樑與路堤均有隨著土壤剪力波速的增加,振動量有減小之趨勢。 在遠域振動衰減之分析,橋樑結構之衰減係數隨土壤剪力波速的增加,衰減係數增大。橋樑結構之整體衰減係數在沖積層為0.51~1.13×10-3 (1/m)、卵礫石層為0.95~1.83×10-3 (1/m)、岩盤為1.98~2.09×10-3 (1/m)。另在相同土壤狀況下,淺基礎之衰減係數一般大於深基礎。路堤結構之衰減係數則隨著土壤剪力波速的增加而減小,與橋樑結構有所不同,在沖積層為2.70~4.12×10-3 (1/m)、卵礫石層為2.35×10-3 (1/m)、岩盤為1.26×10-3 (1/m)。 在遠域振動影響距離之評估,橋樑結構在淺基礎之影響距離於岩盤為260~290 m、於卵礫石為140~220 m。在深基礎狀況,沖積層之影響距離為360~470 m、卵礫石層為340~450 m、岩盤為220~320 m。深基礎於沖積層之影響距離最遠,而淺基礎於卵礫石最近。路堤之影響距離於沖積層為205~220 m、於卵礫石層為210~230 m、於岩盤為250~310 m。路堤於岩盤有較遠之影響距離,而於沖積層則較近。 本研究最後利用台灣高鐵行駛在橋樑及路堤結構於不同條件下之評估結果,建立一套高速鐵路引致地盤振動之簡易預測模式,該預測模式之表示以圖及表為主。

並列摘要


This study explores the characteristics of ground vibration induced by Taiwan high-speed trains on bridge and embankment structures. Both near-field vibration and far-field vibration propagation are evaluated. Various influence factors such as train speed, soil type, foundation type, frequency dependence, volume of the structure, and vibration influence distance are examined. For near-field vibration assessment, the ground vibrations increase with increasing train speed on both bridge and embankment structures. The overall vibration level for bridge structures is in the range of 53~72 dB when the speed is between 160 and 300 km/hr. The bridge-shallow foundation has greater vibration level than the bridge-deep foundation. For embankment structures, the overall vibration level is in the range of 52~71 dB for train speed between 150~300 km/hr. In addition, the vibration level reduces on both bridge and embankment structures when the ground shear wave velocity increases. For far-field vibration attenuation analysis, the attenuation coefficient of bridge structure increases as the ground shear wave velocity increases. The overall attenuation coefficients in the alluvial soils, gravelly soils, and rock are 0.51~1.13×10-3 (1/m), 0.95~1.83×10-3 (1/m), and 1.98~2.09×10-3 (1/m), respectively. For the same geological conditions, shallow foundation has greater attenuation coefficient than the deep foundation. For embankment structures, the attenuation coefficient decreases as the ground shear wave velocity increases. The overall attenuation coefficients in the alluvial soils, gravelly soils, and rock are 2.70~4.12×10-3 (1/m), 2.35×10-3 (1/m), and 1.26×10-3 (1/m), respectively. Based on the far-field assessment, the vibration influence distance for bridge-shallow foundation in the rock and gravel are 260~290 m and 140~220 m, respectively. For deep foundation, the influence distance for alluvial soils, gravelly soils, and rock are 360~470 m, 340~450 m, and 220~320 m, respectively. The deep foundation in alluvium has the farthest influence distance while the shallow foundation in gravels has the shortest influence distance. Moreover, the influence distance of embankment structures in alluvial soils, gravelly soils, and rock are 205~220 m, 210~230 m, and 250~310 m, respectively. The embankment in rock has the farthest influence distance, while the alluvium has the shortest influence distance. Finally, the specific ground vibration prediction models are established for Taiwan high-speed trains on bridge and embankment structures. The prediction models are expressed in the figures and tables.

參考文獻


22.韓卓高,「高鐵列車於路堤結構引致地盤振動之影響因子評估」,碩士論文,中原大學土木工程研究所,桃園,2009。
21.邱廷銳,「高鐵列車於橋樑結構引致地盤振動之影響因子評估」,碩士論文,中原大學土木工程研究所,桃園,2009。
20.張仕銘,「高鐵列車於路堤結構引致地盤振動之評估」,碩士論文,中原大學土木工程研究所,桃園,2008。
19.陳國彥,「高鐵列車於橋樑結構引致地盤振動之評估」,碩士論文,中原大學土木工程研究所,桃園,2008。
23.黃宗宸,「台南科學園區地盤振動試驗與其衰減特性之研究」,博士論文,台灣大學土木工程研究所,台北,2010。

被引用紀錄


劉志豪(2017)。高速鐵路引致地盤振動之自動預測模式評估〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840%2fcycu201700041
魏碩賢(2014)。高鐵列車引致地盤振動之遠域影響範圍評估〔碩士論文,中原大學〕。華藝線上圖書館。https://doi.org/10.6840%2fcycu201400085

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