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本文讨论了当前动力测桩中“小应变”法能否应用于确定单桩轴向承载力这一有争议的问题。作者通过多年的研究和积累的大量实测数据均表明：只要被测的校一土体系能产生请振的相应激励功率是足够的，这样的“小应变”动测法才可应用于生产实践。火箭式激振器给动力测桩提供了较为理想的激励手段。
This paper discusses the controversial issue of whether the “small strain” method in current dynamic pile surveying can be applied to determine the axial bearing capacity of single pile. The author’s many years of research and accumulated large amounts of measured data indicate that such “small strain” dynamic test can be applied to production practice as long as the measured excitation power is enough to generate the corresponding excitation power. The rocket exciter provides an ideal incentive measure for dynamic pile test.