Interface prediction ahead of the excavation front by the tunnel-seismic-while-drilling (TSWD) method
Interface prediction ahead of the excavation front by the tunnel-seismic-while-drilling (TSWD) method
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DOI：
10.1190/1.2740712
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发表时间：
2007-06
期刊：
影响因子：
3.3
通讯作者：
L. Petronio;F. Poletto;A. Schleifer
中科院分区：
文献类型：
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作者：
L. Petronio;F. Poletto;A. Schleifer
预测隧道前方的地质界面在隧道掘进时是非常重要的。地层特性的意外变化可能会导致隧道掘进前进的问题和人身安全的风险。隧道随钻地震（TSWD）方法利用机械开挖过程中产生的噪声来获得可解释的地震数据。这种被动方法使用安装在前进的隧道掘进机上的加速度计（参考信号）以及位于隧道沿着和外部的地震传感器。固定传感器记录的数据与参考信号互相关，并按偏移量排序。类似于反向垂直地震剖面，互相关TSWD数据进行处理，以提取反射波场。在机械开挖穿越上三叠统白云岩的950 m隧道期间，进行了地质界面预测调查。在地震TSWD数据上观察到与隧道相交的断层，随后通过地质结构检查进行了确认。P-和S-波I.
Predicting geologic interfaces ahead of a tunnel front is of major importance when boring tunnels. Unexpected variations in ground properties can cause problems for tunnel-boring advance and risk for human safety. The tunnel-seismic-while-drilling (TSWD) method utilizes noise produced during mechanical excavation to obtain interpretable seismic data. This passive method uses accelerometers mounted on the advancing tunnel-boring machine (reference signals) together with seismic sensors located along and outside the tunnel. Data recorded by fixed sensors are crosscorrelated with the reference signal and sorted by offset. Similar to reverse vertical seismic profiling, crosscorrelated TSWD data are processed to extract the reflected wavefield. During mechanical excavation of a 950-m tunnel through upper Triassic dolomite, a survey was performed to predict geologic interfaces. Faults intersecting the tunnel were observed on seismic TSWD data and later were confirmed by geostructural inspection. P- and S-wave i...