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试验研究
              试验研究

              DOI:10.11973/wsjc202408003


                        考虑谐振信号干扰的陡坡段基桩低应变


                                                 检测优化方法




                                                           李 胜
                                           (山东正元工程检测有限公司,济南 250101)

                       摘  要:单一分析应力波信号相位参数时,应变波分析过程中忽略了谐振信号的干扰,而导致
                   陡坡段基桩低应变检测结果准确度较低,因此,提出一种考虑谐振信号干扰的陡坡段基桩低应变检
                   测优化方法。基于陡坡段基桩的土体建设方法,获取其应力波信号,通过求解谐振信号的概率密度
                   函数,结合最大化似然函数修正谐振信号的干扰,优化应力波信号,解析应力波在基桩中的行波过
                   程,分析低应变检测结果。试验结果表明,所提方法得出的陡坡段基桩检测结果表现出的荷载一致
                   度较高,结果准确度较高,能够满足陡坡段基桩安全检测工作的实际需求。
                       关键词:陡坡段基桩;基桩应变;低应变;谐振信号;应变检测;信号干扰
                       中图分类号:TU473;TG115.28      文献标志码:A    文章编号:1000-6656(2024)08-0013-05

                        Optimization method for low strain detection of steep slope foundation piles

                                         considering resonance signal interference


                                                           LI Sheng
                                 (Shandong Zhengyuan Engineering Testing Co., Ltd., Jinan 250101, China)
                      Abstract: When analyzing the phase parameters of stress wave signals alone, the strain wave analysis process ignores
                   the interference of resonance signals, resulting in low accuracy of low strain detection results for steep slope section piles.
                   Therefore, an optimization method for low strain detection of steep slope section piles considering the interference of
                   resonance signals is proposed. Based on the soil construction method of steep slope foundation piles, the stress wave
                   signal is obtained. By solving the probability density function of the resonance signal and combining it with the maximum
                   likelihood function to correct the interference of the resonance signal, the stress wave signal is optimized, the traveling
                   wave process of the stress wave in the foundation pile is analyzed, and the low strain detection results are analyzed.
                   The experimental results show that the load consistency of the pile detection results obtained after the application of the
                   proposed method is high, indicating that the accuracy of the results is high and meets the practical needs of pile safety
                   detection in steep slope sections.
                      Key words: steep slope foundation pile; pile strain; low strain; resonant signal; strain detection; signal interference


                  基桩低应变检测技术是一种常用的建筑基桩                           水平,诸多技术人员对基桩低应变检测方法进行了
              检测技术,近年来已经有了初步的应用 。低应变                            研究。
                                                  [1]
              检测方法能够发射沿桩身传播的应力波来评定基                                  陈伟池等 针对软土地层中的基桩低应变检测
                                                                             [2]
              桩桩身的完整性。为了进一步提高基桩检测的技术
                                                                方法进行研究,分析软土地层的基本地质参数并以
                                                                此设定检测的循环次数,以基桩的水平向力为基准
                 收稿日期:2024-03-12

                                                                构建基桩模型;再利用该模型分析基桩的地基反力
                 作者简介:李 胜(1990—),男,本科,工程师,主要研究方向为
                                                                分布情况,根据分析结果在基桩周围设置低应变检
              岩土工程地基基础检测
                 通信作者:   李 胜,t838658@163.com                    测点,采用反射波法获取基桩低应变信号并进行信
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                                                                                         2024 年 第 46 卷 第 8 期
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