南京地铁工程勘察中声波测试与分析

通过将声波测井及岩芯波速测量等方法运用于南京地铁工程勘察中,利用声波测井结果与岩芯物性参数对比,进行多参数综合分析,为岩体风化程度与岩体强度变化分析提供了有效的参数。原位声波波速测量,给出了岩体波速随深度的分布特征;通过原位测井波速与室内岩芯波速的对比测量,分析了不同强度岩石在不同测量条件下的差异;对原位测井波形特征的振幅变化、衰减特性分析,可进一步了解岩体的结构性质,从而证明声波测井是工程地质勘察中一种快速、经济、有效的岩体原位测试方法。

ACOUSTIC MEASUREMENT AND ANALYSIS IN NANJING SUBWAY ENGINEERING INVESTIGATION

Acoustic logging and wave velocity measurement of borehole cores are applied to get some important information about rock characteristics in Nanjing subway engineering investigation. Based on the comparison of physical properties between acoustic logging and borehole cores,using the synthetical analysis of multi- parameter,much efficient information about rock weathering and strength is achieved. Using rock acoustic wave velocity of in-situ measurement,the distributing characteristic of the wave velocity of rocks in different depths are presented. Compared with the velocity measurement of well-logging and borehole cores,the disparities of rocks with different strengths on different measuring conditions,the amplitude variation,and attenuation characteristics of wave features of well-logging,are analyzed,and the structure properties of the rocks are discussed. It is proved that acoustic logging is a rapid,economic,and efficient method on in-situ measurement in geology engineering investigation.