东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (3): 446-451.DOI: 10.12068/j.issn.1005-3026.2016.03.030

• 资源与土木工程 • 上一篇    下一篇

土壤交流电阻率与其化学风化程度的关系

刘京铄1,2， 陈宇龙3， 聂闻4， 宁果果5   

  1. (1. 中南大学 资源与安全工程学院， 湖南 长沙410083； 2. 湖南水利水电职业技术学院， 湖南 长沙410131；3. 东京大学 土木工程系， 日本 东京113-8656； 4. 重庆大学 资源与环境工程学院， 重庆400030；5. 湘潭市安全生产监督管理局， 湖南 湘潭411100)
  • 收稿日期:2015-03-11 修回日期:2015-03-11 出版日期:2016-03-15 发布日期:2016-03-07
  • 通讯作者: 刘京铄
  • 作者简介:刘京铄(1979-)，男，湖南邵东人，中南大学博士研究生.
  • 基金资助:
    国家重点基础研究发展计划项目(2013CB035401)；国家自然科学基金资助项目(51174228)；湖南省教育厅科学研究项目(14C0746).

Relationship Between AC Electrical Resistivity and the Degree of Soil Chemical Weathering

LIU Jing-shuo1,2， CHEN Yu-long3， NIE Wen4， NING Guo-guo5   

  1. 1. School of Resources and Safety Engineering， Central South University， Changsha 410083， China; 2. Hunan Hydroelectric Occupational College， Changsha 410131， China; 3. Department of Civil Engineering， University of Tokyo， Tokyo 113–8656， Japan; 4. College of Resources and Environmental Sciences， Chongqing University， Chongqing 400030， China; 5. Xiangtan Municipal Administration of Work Safety， Xiangtan 411100，China.
  • Received:2015-03-11 Revised:2015-03-11 Online:2016-03-15 Published:2016-03-07
  • Contact: LIU Jing-shuo
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摘要： 利用交流电桥研究了含水率和电流频率对土体电阻率的影响，并探讨电阻率与土体的化学风化指数CWI的关系.试验结果表明，土样的电阻率随着含水率和电流频率的增加而减小；当含水率低时，随着含水率的增加，电阻率快速降低；当含水率高时，随着含水率的增加，电阻率的降幅较小；而电流频率引起的降幅较小；基于风化程度与电阻率正相关的观点，建立了电阻率与化学风化指数的关系式，并给出了拟合参数的计算方法；拟合公式预测的化学风化指数值与实测数值基本吻合，可为风化程度的评价提供参考依据.

关键词: 土力学, 电阻率, 化学风化指数, 含水率, 电流频率

Abstract: By using alternating current(AC) bridge， the effects of the water content and electric current frequency on the electrical resistivity of soils were studied to investigate the relationship between resistivity and soil chemical weathering index (CWI). The test results show that the electrical resistivity of soils decreases with the increase of water content and electric current frequency. When the water content is relatively low， the electrical resistivity decreases very sharply with the increase of water content， but turned slowly at relatively high water content. However， the electrical resistivity has only a smaller reduction with the increase of the electric frequency. Based on the viewpoint of that the weathering degree is positively related to the electric resistivity， the relationship between resistivity and chemical weathering index was established， and the computing method for fitted parameters was given. A comparison between CWI predicted by fitted equation and actual CWI was made to show its reliability. The electrical resistivity can provide reference for the evaluation of the degree of weathering.

Key words: soil mechanics, electrical resistivity, chemical weathering index(CWI), water content, electric current frequency

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