卵礫石層全套管基樁施工引致之地盤振動

GROUND VIBRATION INDUCED BY ALL CASING PILING IN A GRAVELLY COBBLE DEPOSIT

陳冠羽(Kuan-Yu Chen) ； 黃俊鴻(Jin-Hung Hwang) ； 林大鈞(Ta-Chun Lin) ； 謝致德(Je-Der Hseih)

《中國土木水利工程學刊》 36卷2期 (2024/04) Pp. 137-149

https://doi.org/10.6652/JoCICHE.202404_36(2).0003

摘要

為探討現地全套管基樁於卵礫石層施工所引致之地盤振動特性，以及評估其施工振動對鄰近結構物、環境及鄰近擋土柱施工作業安全性之影響。本研究進行一系列現地振動量測試驗，研究結果將全套管基樁施工之振動源機制概分為三類，並分別介紹不同振源型式所引致之地盤振動特性。依據試驗量測資料建立尖峰質點速度值與距離間之衰減關係，推求卵礫石地盤之振動衰減係數與衰減速率，並進一步應用振動隨距離衰減關係，搭配國際常見之振動管制準則所建議之容許振動值，提出全套管基樁施工與鄰近建物間之建議安全距離。此外，亦透過振動衰減率，推估卵礫石地層中人工擋土柱施工作業安全之影響範圍。最後，應用環境振動評估中常用的三分之一倍頻帶頻譜分析，評估全套管施工振動對鄰近結構物之影響程度。

關鍵字

地盤振動 ； 全套管基樁 ； 卵礫石 ； 衰減特性

並列摘要

This paper aims to explore the vibration characteristics of the gravelly cobble deposit caused by all casing piling and to evaluate the impact of vibration on the surrounding structures, the environment, and the construction safety of the adjacent retaining columns. A series of in-situ vibration measurement tests were carried out. This study classified the vibration source mechanism into three categories and introduced the vibration characteristics of the ground caused by different vibration source types. Based on the measured data, the attenuation relationship between the peak particle velocity value and the distance is established, and the vibration attenuation coefficient and rate are calculated for the gravelly cobble site. The safety distance between the location of all casing piling and the adjacent buildings is recommended by combining the attenuation relationship with distance and the vibration criteria. In addition, the vibration attenuation rate is also used to estimate the influence distance for the construction safety of hand-dug retaining piles commonly used in gravelly cobble deposits. Lastly, the one-third octave band spectrum analysis is used to evaluate the impact of vibration on adjacent structures.

並列關鍵字

ground vibration ； all casing pile ； gravelly cobble ； attenuation characteristics

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