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岩溶隧道掘进爆破震动效应分析

, PP. 56-59

Keywords: 隧道工程,隧道爆破,溶洞,震动

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Abstract:

针对岩溶地区隧道爆破开挖对溶洞围岩和施工安全的直接影响,对广东清(远)连(州)高速公路白须公隧道救援通道爆破震动进行了监测。通过对溶洞壁的质点振动速度峰值统计分析,总结了爆破地震波在溶洞壁上的衰减规律,得出了隧道爆破对于临近溶洞的安全质点振动速度峰值。监测结果表明隧道爆破震动中,相邻的溶洞壁径向的振动速度较小,垂直切向和纵向的振速相当;随着比例药量的减小,垂直切向和径向的振速逐渐接近。

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