钻孔灌注桩由于其具有的优越性,在现代工程上被广泛应用。但由于其具有的隐蔽性,现在在检测钻孔质量时往往还是采用古老的钢筋笼探孔器加测绳进行较粗的检查。超声波技术的应用使得对钻孔进行全面而直观的检测变的可能。文章以超声波钻孔侧壁测定仪在下沙大桥建设中的实际应用,对钻孔检测进行了探讨。 Because of its advantages, bored piles have been widely used in modern engineering. However, due to its hidden nature, it is often still used in the detection of the quality of the ancient hole cage steel reinforcement rope plus test coarser inspection. The application of ultrasonic technology makes it possible to conduct a comprehensive and intuitive inspection of the borehole. In this paper, the practical application of ultrasonic drilling side wall detector in the construction of Xiasha Bridge was discussed in this paper.