垂直孔爆破試驗引致振動之量測與分析

MEASUREMENT AND ANALYSIS OF VIBRATION INDUCED BY VERTICAL-HOLE BLAST TESTING

黃俊鴻(Jin-Hung Hwang) ； 鄧源昌(Yuan-Chang Deng) ； 歐怡岑(Yi-Tsen Ou) ； 柯永彥(Yung-Yen Ko)

《中國土木水利工程學刊》 29卷3期 (2017/09) Pp. 183-194

https://doi.org/10.6652/JoCICHE.201709_29(3).0005

摘要

為避免隧道開炸對既有工程結構物與鄰近聚落之影響，本研究設計與執行「新烏山嶺引水隧道工程」之前導爆破試驗。前導試驗模擬此隧道工程鑽炸法單孔爆破及多孔延遲爆破之最大裝藥量來進行，量測並分析爆炸時於距爆破點不同距離處之鄰近自由場、邊坡、水工結構物與舊引水隧道所引致之振動量。根據其波形、振幅隨距離衰減關係、富氏譜以及反應譜，探討並比較其振動量與振動特性。依據量測分析結果，進而評估新建隧道採鑽炸法開挖時所產生之振動影響，可作為擬定新隧道施工開炸程序、既有工程結構物之安全監測以及施工期間各項減振與隔振對策之參考。

關鍵字

新烏山嶺引水隧道 ； 爆破振動 ； 地盤最大速度 ； 現地振動量測

並列摘要

This study aims to perform in-situ measurement and analysis on the vibration induced by the pilot blast testing in the New Wushanling Tunnel Project. In the test, the maximum charge amount for both single-hole blasting and multi-hole short-delay blasting of the drill and blast method for this project was simulated. The vibration level in the free field at different distances to the blasting point, as well as at the slope, the hydraulic structures and the original Wushanling Tunnel in the surrounding area, were measured. In addition, the vibration characteristics were investigated and compared according to the wave forms, the amplitude attenuation with respect to distance, the Fourier spectra and the response spectra. Based on the results, the influence of the vibration induced by the drill and blast during the construction of a new tunnel on the neighboring residential area and existing engineering structures can be evaluated. Furthermore, the procedures of blasting, the safety monitoring and management for existing engineering structures and the vibration mitigation and isolation measures can be implemented accordingly.

並列關鍵字

new wushanling tunnel ； blast-induced vibration ； peak ground velocity ； in-situ vibration measurement