土石混合料电阻率模型研究综述

doi:10.3969/j.issn.1674-0696.2025.01.10

摘要/Abstract

摘要： 电阻率法能通过表面电导率对岩土体等多孔介质内部结构及特性进行探测与表征，被广泛应用于原位测试中。土石混合料是由多相介质组成的极端不均匀松散岩土介质系统，其整体导电性受各相介质的空间分布、导电能力及组合方式的影响。众多学者对土体电阻率进行了试验与理论研究，总结得到了多种土体电阻率理论模型。由于土石混合料的电阻率特性及相关理论研究起步较晚，笔者在土体电阻率模型的基础上，分析了土石混合料的导电机理，对已有的土石混合料电阻率模型及其局限性进行总结。结果表明：混合介质的导电原理，为土石混合料电学传导模型的研究奠定基础；基于电化学理论，单相介质的电导性已有成熟的理论，而多相介质体的导电模型还处于不断完善与改进中；已有土石混合料电阻率模型可分为串-并联模型与区域统计模型，区域统计模型多为经验公式，应用方便，但模型的普适性仍需提高，串-并联模型有较好的理论基础，模型中参数的物理意义明确，但将导电介质简化为串并联排列仍有别于土石混合料复杂的内部结构组成，模型仍需进一步完善。

关键词: 岩土工程；土石混合料；电阻率模型；串-并联模型；区域统计模型

Abstract: The electrical resistivity method can detect and characterize the internal structure and characteristics of porous media such as soil and rock through surface conductivity, so it is widely used in the in-situ tests. Soil-rock mixture (S-RM) is an extremely uneven and loose rock and soil medium system composed of multiphase media, and the conductivity of S-RM is influenced by the spatial distribution, conductivity and combination modes of each media. A large number of scholars have carried out experimental and theoretical studies on soil resistivity, and various theoretical models of soil resistivity have been summarized. Due to the late start of research on the electrical resistivity characteristics and related theories of S-RM, the conductivity mechanism of S-RM was analyzed on the basis of the soil electrical resistivity model, and the existing electrical resistivity models of S-RM and their limitations were summarized. The results indicate that the conductive principle of the mixed medium lays the foundation for the study of electrical conductivity models of S-RM. Based on the electrochemical theory, there is a mature theory for the conductivity of single-phase media, while the conductivity model of multiphase media is still being continuously improved and perfected. The existing electrical resistivity models for S-RM can be divided into series-parallel connection model and regional statistical model. The regional statistical model is mostly empirical formula, which is convenient to apply, but the generalizability of the model still needs to be improved. The series-parallel connection model has a good theoretical foundation, and the physical meanings of parameters in the model are clear. However, simplifying the conductive medium into a series-parallel arrangement is still different from the complex internal structure of S-RM, and the model still needs further improvement.

Key words: geotechnical engineering; soil-rock mixture; electrical resistivity model; series-parallel connection model; regional statistical model

中图分类号:

TV49

陈松林1,汪魁1,赵明阶1,2. 土石混合料电阻率模型研究综述[J]. 重庆交通大学学报（自然科学版）, 2025, 44(1): 75-85.

CHEN Songlin1, WANG Kui1, ZHAO Mingjie1, 2. Literature Review of Electrical Resistivity Model of Soil-Rock Mixture[J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(1): 75-85.

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