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钻孔灌注桩的质量与成孔期间造成的扩颈、缩径、孔斜等有很大的关系。介绍了在日产ＤＭ－６８６Ⅲ型超声波孔壁测定仪和无锡产ＪＸＹ－２型测井仪的基础上，研制出的一套新型的机电一体的ＹＤ１００－４型桩孔质量检测仪，包括原理、主要性能和操作方法。对现场具有代表性的桩孔进行了检测，并给出了打印结果
The quality of cast-in-place bored piles has a lot to do with such problems as expanding the neck, reducing the diameter, and slanting holes during the hole-forming process. This paper introduces a new set of electromechanical YD100-4 pile quality detector developed on the basis of Nissan DM-686Ⅲ ultrasonic wall analyzer and Wuxi production JXY-2 logging instrument, including the principle, The main performance and operation method. The representative pile hole was tested and the printing result was given