电阻率层析成像技术在岩土工程和地质环境工程中的应用

Md Jobair Bin Alam, Asif Ahmed, Md Zahangir Alam
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摘要

电阻率层析成像(ERT)已成为岩土工程和地质环境研究中最常用、最方便的地球物理方法之一。电阻率层析成像技术是一种新兴技术,如今已成为调查地下条件的常用方法。使用各种电极配置的该技术具有多种属性,可大大缩短测量时间,甚至适用于难以进入的山区。这是一种用于地下表征的非侵入式测试,也是一种非常灵敏的方法,用于确定地球物理特性,即结构完整性、含水量、流体成分等。本文旨在通过四个案例研究,阐明 ERT 技术的主要特点及其在岩土工程和地质环境工程中的应用。第一个案例研究调查了生物反应器垃圾填埋场渗滤液再循环后可能的流动路径和水分积聚区域。第二个案例研究试图确定公路路面的湿度变化。第三个案例研究探讨了利用 ERT 进行斜坡破坏调查的问题。第四个案例研究展示了 ERT 方法在垃圾填埋场蒸发蒸腾(ET)覆盖层中的效率,以在更大范围内调查湿度变化和性能监测。在所有四个案例中,ERT 都表现出了良好的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Application of Electrical Resistivity Tomography in Geotechnical and Geoenvironmental Engineering Aspect
Electrical resistivity tomography (ERT) has turned out to be one of the most applied and user-friendly geophysical methods in geotechnical and geoenvironmental research. ERT is an emerging technology that is becoming popular nowadays for investigating subsurface conditions. Multiple attributes of the technology using various electrode configurations significantly reduce measurement time and are suitable for applications even in hardly accessible mountain areas. It is a noninvasive test for subsurface characterization and a very sensitive method used to determine geophysical properties, i.e., structural integrity, water content, fluid composition, etc. This paper aimed to elucidate the ERT technique’s main features and applications in geotechnical and geoenvironmental engineering through four case studies. The first case study investigated the possible flow paths and areas of moisture accumulation after leachate recirculation in a bioreactor landfill. The second case study attempted to determine the moisture variation along highway pavement. The third case study explored the slope failure investigation by ERT. The fourth case study demonstrated the efficiency of the ERT method in the landfill evapotranspiration (ET) cover to investigate moisture variation on a broader scale and performance monitoring. In all of the four cases, ERT exhibited promising performance.
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