桩基岩溶注浆模型高密度电法二维正演模拟

摘要

研究目的:高密度电法是一种常用的桩基岩溶注浆质量无损检测方法,为使该方法更好地应用于生产实践,本文采用RES2DMOD软件(版本号3.0)对桩基岩溶注浆地质-地球物理模型进行了高密度电法二维正演数值模拟.研究结论:数值模拟结果表明,完整注浆体和岩溶注浆缺陷在高密度电法视电阻率断面图上均有反应,分别为高阻异常和低阻异常.温纳装置高密度电法对于异常的反应相对明显,异常的范围比较大,但幅值相对较小；施伦贝谢装置对于异常的反应幅值较大,但范围较小,且呈垂向分布,相对不易识别.%Research purposes; The high -density resistivity method (HDR) is a commonly used method for detecting the quality of grouting karst of pile foundation. In order to guide the production practice, RES2DM0D 3.0 was used for 2D forward simulation with high - density resistivity for grouting karst of pile foundation to the geology - earth physical model . Research conclusions: The result of numerical simulation shows the full grouting body and defects of grouting karst can be reflected on the resistivity profile drawing respectively by abnormal high resistance and low resistance. The geophysical anomaly is obvious with large abnormal range and small amplitude when using the Wenner array HDR method, and the geophysical anomaly is weaker with small reflection amplitude and vertical distribution when using the Wenner - Schlumberger array and it is difficult to distinguish.