对汶川地震后,具有承台和桥墩的某成桥桩进行小波分析,选择db10为小波基对PIT检测的低应变波进行小波分解,判定桩身完整性。并对分解的第一层信号d1做Hilbert包络和谱分析,评估桩身损害的程度。提出一套成桥桩基在低应变完整性检测下的小波快速分析方法。 After the Wenchuan earthquake, wavelet analysis was carried out on a bridge with piles and piers, and db10 was selected as the wavelet basis to decompose the low strain wave detected by PIT by wavelet to determine the integrity of pile. Hilbert envelope and spectral analysis are performed on the decomposed signal d1 of the first layer to evaluate the degree of damage to the pile body. A fast wavelet analysis method of pile foundation under low strain integrity is proposed.