高密度电法概率成像技术在堤防隐患探测中的应用

堤坝渗漏是危害堤防安全的重要原因之一,如何确定堤防隐患点是人们关心的重点。在堤防隐患探测中,高密度电法能实现快速、准确的探测,为分析堤坝渗漏的原因和位置提供了依据。本文简要介绍了高密度电法的基本原理和概率成像技术。通过对河南武陟沁河大堤童关段高密度电法勘察的应用情况进行分析,引入概率成像技术对测量资料进行了成像处理,结果较准确地勾绘出了异常体的位置和大致形态。与采用传统最小二乘优化反演方法的解释结果进行了对比,结果展示了高密度电法在堤防隐患探测的作用,验证了概率成像技术的有效性和实用性。

THE APPLICATION OF HIGH DENSITY RESISTIVITY PROBABILITY TOMOGRAPHY IMAGE IN DIKE ENGINEERING EXPLORATION

Dike leakage is one of the main dangers for the safety of the dike.How to accurately confirm the hidden defects in dike is the most concerned problem.As exploring the hidden defects of dike,the high density resistivity method can achieve high-speed,exact detection,which can provide foundation for analyzing the position and configuration of dike leakage.In this paper,the rationale of the high density resistivity and probability image is introduced.We review the application of high density resistivity to dike engineering exploration of Qin River in Henan province and present a new method of data processing which is named probability image.The result of probability image is compared with the inversion result by least-square method,which shows high density resistivity is applicable and the probability image method is effective.