南方电网技术2017，Vol.11Issue(9)：23-29,7.DOI:10.13648/j.cnki.issn1674-0629.2017.09.004
深井型直流接地极固井混凝土电阻率变化规律
Electrical Resistivity Variation Law of Well Cementing Concrete of DC Deep Well Grounding Electrode
摘要
Abstract
When constant direct current( DC) is impressed on DC deep well grounding electrode, electrochemical, corrosion reaction occurs between the well cementing concrete and the steel tube, and the well cementing concrete acts as electrolyte.The reaction leads to the electrical resistivity variation of the well cementing concrete.In order to study the electrical resistivity variation law of well ce-menting concrete in different conditions with the DC duration, experiments are carried out in this paper.According to the water cement ratio of the practical deep well grounding electrode engineering, the concrete samples are prepared.The DC experiments for concrete samples which are cured for 3~7 days and entirely cured are conducted.The results show that the concrete electrical resistivity con-forms to Archie formula at the beginning of curing period, the concrete electrical resistivity during curing period increases with the DC duration and so does the entirely cured and impregnated concrete, while the electrical resistivity of entirely cured and dried concrete de-creases with the DC duration.The analysis shows that DC polarization is the main reason leading to the difference of the two trends.关键词
深井接地极/固井混凝土/固结时间/电极反应/直流极化/电阻率Key words
deep well grounding electrode/well cementing concrete/curing time/electrode reaction/DC polarization/electrical re-sistivity分类
信息技术与安全科学引用本文复制引用
蔡汉生,滕芸,贾磊,郑智慧,胡上茂,鲁海亮,刘刚,文习山..深井型直流接地极固井混凝土电阻率变化规律[J].南方电网技术,2017,11(9):23-29,7.基金项目
南方电网重大专项项目(WY-KJXM-20150901).Foundation item: Supported by the Major Project of China Southern Power Grid (WY-KJXM-20150901). （WY-KJXM-20150901）
