低频电阻率测试技术在特殊土场地中的应用研究进展

THE APPLICATION OF LOW-FREQUENCY RESISTIVITY TESTING TECHNIQUES IN SPECIAL SOIL SITES:A REVIEW

定量表征特殊土场地的复杂介质及其工程参数,是工程地质原位测试的重要需求。电阻率测试技术因其快速、无损、精确和经济的特点,常作为低频条件下电法测试的首选。本文综述了电阻率测试技术在导电介质复杂(如污染土、盐渍土、冻土)和高黏粒含量(如膨胀土、软土、黄土)的特殊土场地中的应用情况,系统总结了相关测试方法的综合应用及评价体系研究进展,并论述了低频电阻率测试技术与现有原位测试技术的耦合评价方法及其前景。分析显示,电阻率测试技术在特殊土场地的调查评价中表现出良好效果,具有巨大发展潜力,尤其在区域划分和物理属性监测方面表现突出。然而,其在原位膨胀土和污染土场地的工程应用尚需进一步探索与验证;在黄土、软土和冻土中的定量评价机理及应用研究也需加强。此外,场地电阻率参数的解译及影响因素的消除研究还需深化。有必要开展电学测试与原位测试相结合的联合测试方法研究,以增强对场地工程特性的解译和评价能力。预期成果将为我国特殊土场地调查评价提供发展方向,并提升我国在特殊土场地电阻率测试及原位测试的技术水平。

Quantitative characterization of complex media and engineering parameters at specialized soil sites is essential for in-situ geological testing.The resistivity testing technology,known for its speed,non-destructive nature,precision,and cost-effectiveness,is the preferred method for low-frequency electrical testing.This paper reviews the application of resistivity testing technology in special soil environments characterized by complex conductive media(such as contaminated soil,saline soil,and frozen soil)and high clay content(including expansive soil,soft soil,and loess).It systematically summarizes advancements in research concerning the comprehensive application and evaluation systems of related testing methods.Furthermore,it discusses coupling evaluation methods along with their prospects alongside existing in-situ testing techniques within low-frequency resistivity testing technology.The analysis indicates that resistivity testing has yielded favorable outcomes in investigating and evaluating special soil sites while demonstrating significant potential,particularly regarding regional classification and monitoring physical properties.However,further exploration and validation are required to enhance its engineering applications specifically within expansive soils and contaminated site contexts.Additionally,there is a need to strengthen research on quantitative evaluation mechanisms applicable to loess,soft soils,and frozen soils.Moreover,deeper investigation into interpreting site resistivity parameters while mitigating influencing factors is necessary.It is imperative to pursue research on integrated testing methodologies that combine electrical assessments with in-situ evaluations to improve our capacity for interpreting and assessing the engineering characteristics of these sites.The anticipated results will provide a developmental framework for investigating and evaluating special soil locations across China while advancing the nation s technical proficiency in both resistivity measurements as well as in-situ assessments of specialized soils.