声波测井确定滑坡滑动面的效果

Effect Analysis on the Acoustical Logging to Probe Sliding Plane

通过两个滑坡勘查应用实例，论述了声波测井技术在确定滑坡滑动面中的实用性和准确性。由于滑动面上部和下部组成物质在结构、岩性等方面存在着较大的差异，导致声波测井曲线在滑动面位置产生异常跃变现象。利用异常跃变特征点，可准确判定滑面埋深及滑带厚度。本文还分析了利用声波测井曲线判定滑面的效果及精度，并与钻探方法判定滑面的效果和精度进行了对比。结合地层岩性、钻孔孔径以及孔内是否出现缩径、塌孔等问题，对两种方法取得结果之间的差异，进行了综合分析和修正。经后期治理工程验证，声波测井判定滑面位置准确可靠。

Through two examples of application of landslide exploration finished recent years, the paper illustrates the practice and accuracy of using sound logging method to identify the sliding plane of landslide There exists fair variance of the structure and lithological character of materials both at the top and the bottom sliding plane, resulting in the unusual jump points of the curve of sound logging in the sliding plane By using the unusual jump points of the curve of sound logging, we can identify the depth of sliding face and thickness of sliding zone Meanwhile , the present paper analyzes and discusses the effectiveness and precision of using the curve of sound logging to identify the sliding face, and it is compared with the effectiveness and precision of using boring method to identify the sliding face Based on the lithological character of stratum and the internal width of borehole, and whether having shrinkage hole and snakes in hole or not and so on, the variance between the results by the two methods has been comprehensively analyzed and corrected By using the curve of sound logging to identify the location of sliding face is accurate and reliable through the test of the last treatment engineering