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该文介绍了在贵州某隧道面波检测中,利用GEODE24野外地震仪采集面波数据,经傅里叶变换在频率-波数域显示多模式(模态)面波能量团,之后手工提取相速度曲线做出速度剖面,并利用遗传算法对多模式表面波联合反演分析异常,发现了低速带,而且在反演模型中的相应位置也发现混凝土层的塌陷脱空。经钻探验证表明异常圈定较准确,效果令人满意。
This paper introduces a surface wave detection in a tunnel in Guizhou Province, using surface seismometer GEODE24 acquisition of surface wave data, the Fourier transform in the frequency - wave number domain shows multi-mode (mode) surface wave energy mass, and then manually extract the phase velocity Curve is used to make the velocity profile. Genetic algorithm is used to unite the inversion of multi-mode SAW. The low-speed zone is found, and the collapse of the concrete layer is also found in the corresponding position in the inversion model. After drilling proved abnormal delineation more accurate, the effect is satisfactory.