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在市區進行夜間隧道鑽挖工程所產生的土傳噪音及震動,容易引起投訴。現時的技術難以準確預測噪音及震動的級數,而隧道工程的進度也常因進行隧道鑽挖工程時產生過大的土傳噪音及震動而延誤。本文所提述的新技術,可以更準確地量度及預測鑽機震動強度及土壤傳震的特性@個技術包括測量單位衝擊力及隧道鑽機摩擦力所產生的震動級數鋵嵲珈?80於代,美國政府運輸部門(U.S.DeptofTransportationFederalTransitAdministrative)已研發相關的技術,並將該技術應用於鐵路土傳噪音量度及預測上。本文報告隧道鑽機所產生的土傳噪音及震動級數1/3倍頻帶數值的量度及預測。比較地面震動峰值速度(PPV)、最高(Lmax)噪聲和振動級數按快速和緩慢的時間常數和整體百分比(Percentile)數值列出。
Soil noise and vibration caused by tunneling at night in tunnels in the urban area are prone to complaints. The current technology is difficult to accurately predict the levels of noise and vibration. The progress of tunneling projects is also often delayed due to excessive soil-borne noise and vibration during tunneling. The new technology referred to in this paper can more accurately measure and predict the vibration intensity of the rig and the characteristics of the earthquakes. The techniques include measuring the unit impact force and the vibration level of the tunnel rig friction force. 80 鋵 嵲? 80 80 In the meantime, the U.S. government transport department (USDeptofTransportFederalTransactionAdministrative) has developed related technologies and applied the technology to the measurement and prediction of railway soil-borne noise. This paper reports the measurement and prediction of the soil-borne noise and the 1/3 octave band values of tunneling rigs. Comparing Peak Surface Vibration Rates (PPV), the highest Lmax noise and vibration levels are listed with fast and slow time constants and Percentile values.