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在隧道施工过程中经常会遇到含水的破碎带,如果不能提前采取处理措施,将会引起突水、塌方等地质灾害,严重威胁施工安全。由于含水破碎带通常表现为地震波速降低,瑞雷波发生速度频率分散;而对于电法勘探则表现为低电阻率。本文提出了应用瑞雷波和瞬变电磁法相结合的综合探测方法,即综合分析低波速、低电阻率的“双低”区,能够较为准确的确定饱水断裂带、破碎带、含水溶洞的位置及大致规模。
In the process of tunnel construction often encounter water-containing broken belt, if not taken in advance, will cause water inrush, landslides and other geological disasters, a serious threat to construction safety. Due to the fact that the water-bearing fractures are usually characterized by a decrease in seismic velocity, the Rayleigh waves diverge at varying speeds and frequencies, whereas electrical exploration shows low resistivity. In this paper, a comprehensive detection method combining Rayleigh wave and transient electromagnetic method is put forward, that is, a comprehensive analysis of low-velocity, low-resistivity “double low” zone can be more accurate to determine the saturation fault zone, fractured zone, The location and general size of the cave.