反褶积法在桩基缺陷深度检测中的适用性研究
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摘要
反褶积法广泛应用于地震勘探中地层系数的反演,尝试将其应用于桩基检测进行深度方面的验证。利用ANSYS/LS-DYNA建立单缺陷离析桩模型,缺陷位置分别设立在8~18 m处,通过低应变反射波法检测,提取时程曲线,应用最小平方反褶积的频率域法进行数据处理、曲线分析,将分析结果与设置位置作对比,验证了反褶积法的适用性与精确性。
Deconvolution method has been widely applied in reversion of formation coefficient in earthquake exploration.This paper tries to use deconvolution method in verification of pile foundation depth.Disintegrated single defect pile model is established using ANSYS/LS-DYNA,with defect position separately setting at 8~18 m.Through detection with low strain reflected wave method,time curve is obtained.The frequency domain method of the least square deconvolution is applied for data processing and curve analysis.Through comparison between analysis result and setting position,deconvolution method is verified applicable and accurate.
引文
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