通过分析超声波透射法和低应变反射法这2种动测法的基本原理，探讨其各自的优缺点；结合桩基完整性检测实践，研究发现影响超声法波形数据的外部因素有：声测管偏斜、声测管接头，影响低应变法波形数据采集的外部因素有：传感器、激振方式、桩头、桩周土。根据工程实例并结合钻芯芯样对这2种方法的检测效果进行了研究，认为在条件许可的情况下，可将这2种方法结合起来进行分析以减小其检测的局限性。%This paper analyzes basic principle of ultrasonic transmission method and low-strain reflected wave method, and studies their respective advantages and disadvantages. Based on the pile foundation integrity test, the research indicates that the external factors that influence the ultrasonic waveforms include the leaning of acoustic pipe and the joint of acoustic pipe,while the external factors that influence the low-strain reflected waveforms include detecting sensors, exciting models, pile head and soil surrounding pile. Based on the engineering project and core-drilling sample ,detection effect of the two methods is researched. The results show that combined analysis of two methods can reduce the impact of limitations of each method and have a good detection effect, when conditions permit.
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