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ELASTIC WAVE PROBE METHOD FOR TUNNEL, AND ELASTIC WAVE PROBE SYSTEM FOR TUNNEL USING THE SAME
ELASTIC WAVE PROBE METHOD FOR TUNNEL, AND ELASTIC WAVE PROBE SYSTEM FOR TUNNEL USING THE SAME
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机译:隧道的弹性波探测方法以及使用该方法的隧道弹性波探测系统
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摘要
PROBLEM TO BE SOLVED: To accurately estimate a reflection plane three-dimensionally in front of a pit face in a tunnel by data analysis using a simple algorithm, while suppressing the device cost.;SOLUTION: A direct wave is extracted from an elastic wave recorded in a multicomponent recording device 3 for each pit face drilling, an elastic wave speed in the tunnel is measured on the basis of the direct wave data, and a reflection wave is extracted from the elastic wave recorded in the multicomponent recording device 3. A delay time of the reflection wave is measured on the basis of the reflection wave data, and a reflection wave arrival direction is determined in the vertical direction and lateral direction on the basis of the delay time of the reflection wave. A three-dimensional position of the reflection plane of the elastic wave is estimated on the basis of the results of the analysis of the reflection/diffraction wave related to one single-component seismometer (3-1) and the determination in the reflection wave arrival direction.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT
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