低应变基桩动测资料反演问题多解性与人工拟合的初步探讨

在实际低应变基桩动测资料解释工作中常发生误判,其原因除测试人员素质的主观因素外,客观上存在反演问题多解性亦是重要原因之一。这里从正演理论计算与物理概念上阐明,在一定桩土系统的物性、几何参数与拟合精度条件下,反演问题多解性是客观存在的。并且进一步探讨了进行人工拟合时应遵守的规则,正确运用此规则能尽量避免误判的产生。在此规则指导下,对易发生误判的实测曲线进行人工拟合,进一步说明了反演多解性问题的客观存在。

A discussion for the Multi-solutions of the inversion for low strain dynamic testing of foundation pile and the manual matching method

Misinterpretation often occurs in the analysis for the data of the low strain dynamic testing of foundation pile and it is the main reason for the problem of multi-solusions in the inversion besides the subjective factors of the interpreter.The paper discusses the conception of multi-solutions in the inversion using the forward modeling.Under certain physical and geometrical parameters of pile-soil system and precision of matching work,the problem of multi-solutions are impersonally existent in the inversion interpretation.The method and procedure of manual matching work are also given in this paper.The method can provide a quantitative guide for the interpretation work and help the interpreter to avoid misinterpretation.The existence of multi-solutions in inverse interpretation is further discussed by the manual matching work with real data.