【摘要】 低应变反射波法作为基桩检测的一种有效手段,广泛用来评价桩身完整性.本文主要从低应变法的理论出发,结合工程实践分析总结了基桩缺陷的波形曲线表现规律,包括一维弹性杆件的应力波波动理论、低应变反射波法存在的一些问题和局限及实测海南西环铁路改良基桩的检测波形分析和桩身缺陷的波形规律总结等.为了有效地利用分析总结的波形规律并考虑桩-土体系的影响,进而提出对于相同类型桩的缺陷在不同地质环境中波形曲线不同表现的规律,及建立充实波形缺陷判断数据库的展望.完善的数据库可用于辅助工程基桩检测实践和专业研究.更多还原

【Abstract】 As a kind of effective means of testing pile,low strain reflected wave method is widely used to evaluating integrity of pile.This paper proceed from theory of low strain method,analyzing and summarizing laws of waveform of pile with defects based on engineering practice.Main contents including one-dimensional wave theory,some existed problems and limitations,analysis of tested waveform at western fast railway project in Hainan and summarizing waveform’s law of pile with defects etc.In order to availably utilize laws of waveform which have been summarized and consider the system of pile-soil at the same time,the paper proposes outlook about laws of waveform curve corresponding to the same type of pile with defect in diffrent geological environment,enriches database of waveform used to judging defects.Completed database can be used for testing project and relevant studies.更多还原