高精度钻孔超声波成像原理及解释技术

THE PRINCIPLE AND INTERPRETATION TECHNIQUE OF THE HIGH RESOLUTION BOREHOLE ACOUSTIC TELEVIEWER

介绍了钻孔超声波成像的工作原理。由于该系统具有图像分辨率高、方位确定准确的特点,特别适合于确定岩石节理(或岩层)的走向、倾向、倾角,裂隙和破碎发育情况。可根据工程的需要,提供多种综合分析图件,为大型工程的地基基础的地质结构分析、评价提供可靠依据,在香港开展的工程中使用了钻孔超声波成像,取得较好效果。

With the advantages of higher resolution, higher accuracy, in-situ image of borehole wall even in muddy slurry and sufficient post-processing softwares, the borehole acoustic televiewer can supply abundant useful information for foundation analysis in civil engineering investigation. This technique has been widely used abroad but has seldom been utilized in China. This paper gives a brief description of the principle of the borehole acoustic televiewer survey as well as the related technique and deals with the data interpretation.