摘要
本文依据波动原理考查敲击桩头所生成的瞬态波在桩内的传播和反射,说明在桩头所记录的时域信号的构成,导出其振幅谱和相位谱的表达式.着重讨论了波动信号在桩-土体系中所发生的衰减和频散现象,分析它们对振幅谱中的峰值和峰值频率的影响,为桩身质量及桩基状态的评估提供了依据.
In this paper the wave theory is applied to study the propagation and reflection of the transient waves excited by hitting the top of piles,to explain the constitution of the response on the top and to derive the expressions of the amplitude and phase spectrums. Attention is given to the dissipation and dispersion of wave signal in pile-soil system, and a detailed discussion is devoted to the influence of these phenomina on the peak values and peak frequencies of the amplitude spectrum. So an adequate basis for evaluating the integrity of piles is provided.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
1992年第4期82-88,共7页
Journal of Hunan University:Natural Sciences
关键词
桩
非破坏性试验
敲击法
波动原理
pile
non-destructive tests
frequency dispersion
frequency domain analysis
