中南大学学报（自然科学版）2023，Vol.54Issue(12)：4817-4827,11.DOI:10.11817/j.issn.1672-7207.2023.12.019
考虑极化效应的冻土电导率测试频率研究
Study on test frequency of frozen soil electrical conductivity considering polarization effect
摘要
Abstract
To investigate the effect of test frequency on the electrical conductivity of the soil,the electrical conductivity tests on various unsaturated soils at positive and negative temperature were carried out to investigate the effects of frequency.Based on the test results,taking soil properties and temperatures into account,the optimal test frequency was calibrated.The results show that the electrical conductivity of sand at positive temperature is not sensitive to the frequency below 10 kHz,while the electrical conductivity of sand increases when it is over 10 kHz,and silt is not sensitive to the frequency below 100 kHz.Compared with the positive temperature,the impact of frequency in negative temperature results in a conspicuous shift in electrical conductivity.In different polarization regions,the higher the frequency,the greater the electrical conductivity of silt and sand,and the changes domain gradually expands to the low frequency region with the decrease of temperature.Meanwhile,coarse-grained soil is more sensitive to this phenomenon than fine-grained soil.关键词
冻土/电导率/测试频率/极化/粒径Key words
frozen soil/electrical conductivity/test frequency/polarization/particle size分类
建筑与水利引用本文复制引用
成昌帅,冯学茂,滕继东,罗豪良,张升..考虑极化效应的冻土电导率测试频率研究[J].中南大学学报（自然科学版）,2023,54(12):4817-4827,11.基金项目
国家自然科学基金资助项目(52178376,51878665,U1834206) （52178376,51878665,U1834206）
湖南省湖湘青年英才项目(2020RC3008) （2020RC3008）
中南大学创新驱动项目(2020CX034) （2020CX034）
湖南省研究生科研创新项目(CX20210126)(Projects(52178376,51878665,U1834206)supported by the National Natural Science Foundation of China （CX20210126）
Project(2020RC3008)supported by the Program of Youth Talent Support of Hunan Province （2020RC3008）
Project(2020CX034)supported by the Innovation-Driven Program of Central South University （2020CX034）
Project(CX20210126)supported by the Hunan Provincial Innovation Foundation for Postgraduate) （CX20210126）
