摘要
建筑地基探测时,瞬变电磁早期信号易受地表噪声干扰,降低探测精度。为此,有必要研究瞬变电磁多参数反演在建筑地基隐伏断层探测中的应用。利用瞬变电磁法计算视电阻率,将视电阻率反演输入,获取地下电阻率分布,将观测数据与地质模型参数进行匹配,寻优并监测精度,确定地质结构。结果表明,瞬变电磁多参数反演结果与断层深度理论曲线接近,能捕捉地电参数突变特征以准确识别断层信息,该方法在建筑地基隐伏断层中的探测精度高,可满足工程要求。
In building foundation detection,the early signals from transient electromagnetic are easily disturbed by surface noise,which reduces the detection accuracy.In this regard,it is necessary to study the application of transient electromagnetic multi-parameter inversion in the detection of concealed faults in building foundations.The transient electromagnetic method is used to calculate the apparent resistivity,the apparent resistivity is input for inversion to obtain the underground resistivity distribution,and the observation data is matched with the geological model parameters to optimize and monitor the accuracy and determine the geological structure.The results show that the transient electromagnetic multi-parameter inversion results are close to the theoretical curve of fault depth,which can capture the mutation characteristics of geoelectric parameters to accurately identify fault information.The method has high accuracy in detection of concealed faults in building foundations and can meet the engineering requirements.
作者
吴李季
WU Liji(Guangdong Branch of China National Geological Exploration Center of Building Materials Industry,Guangzhou 510403,Guangdong,China)
出处
《工程技术研究》
2025年第18期14-16,共3页
Engineering and Technological Research
关键词
瞬变电磁
多参数反演
建筑地基
地基隐伏断层
断层探测
transient electromagnetic
multi-parameter inversion
building foundation
concealed fault in foundation
fault detection
