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地震勘探中的反褶积积分广泛应用于地层系数的反演,但在桩基础完整性检测方面的应用还是空白。本文根据该两方面应用的相似性,尝试将反褶积应用于桩基检测中。首先,通过有限元软件ANSYS/LS-DYNA分别建立单缺陷、多缺陷桩模型进行数值模拟,通过低应变反射波法对其进行检测,提取速度时程曲线,应用最小平方反褶积进行曲线分析,将分析的结果与实际工程中检测得到的曲线进行对比,验证了反褶积方法的精确性与适用性,为桩的完整性检测提供了一种新思路。
The deconvolution integrals in seismic exploration are widely used in the inversion of formation coefficient, but the application in the integrity checking of pile foundation is still blank. Based on the similarities between the two aspects, this paper attempts to apply deconvolution to pile testing. First, the finite element software ANSYS / LS-DYNA was used to establish the single defect and multiple defect piles model for numerical simulation. The model was tested by low strain reflection wave method. The velocity time history curve was extracted and the curve was analyzed by least squares deconvolution The results of the analysis are compared with those obtained from the actual project. The accuracy and applicability of the deconvolution method are verified, which provides a new idea for the integrity testing of piles.