超声波法在判定桩身缺陷范围中的应用

Application of Ultrasonic Method to Determine the Pile's Defect Range

该文简要介绍了超声波检测基桩的平测法、斜测法和扇形扫测法,并对上述方法的声波曲线特征进行了对比分析。在超声波检测中,发现缺陷后先运用低应变法进行辅助验证,然后,综合运用加密测点、斜测法、扇形扫测法判定缺陷的范围,并绘出缺陷部位的纵向剖面图和水平断面图。从图中可以清晰地反映出缺陷随深度的渐变过程和范围,为施工处理提供了可靠的依据。

This paper briefly introduces horizontal, inclined and fan-shaped scanning measurement method of ultrasonic testing foundation piles, and the acoustic curves characteristics ＇above methods are compariative ana- lyzed. In the course of ultrasonic testing, we first utilize low strain method to auxiliary validation after finding the detects, then comprehensive use encryption measuring point, inclined and fan-shaped scanning measure- ment method to determine the defects range, and the longitudinal profile and horizontal cross-section diagram of the defective parts are drew. From the figure, the defects gradual process with the depth and defects range can be clearly reflected, and it provides the reliable basis for construction treatment.