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| DOI：10.13522/j.cnki.ggps.2023498 |
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| Study on resistivity characteristics and model of laterite considering size effect |
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YANG Changwen, PENG Guangcan, HE Yiting, LIU Zhenghui, ZHANG Zhao
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1. School of Changchun Institute of Technology, Changchun 132012, China; 2. Yunnan Agricultural University,
Kunming 650201, China; 3. Jilin Province Central City Water Supply Co., Ltd, Changchun 130000, China;
4. Jilin Kaijiang Construction Engineering Co., Ltd, Jilin 132001, China
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| Abstract: |
| 【Objective】The purpose of this paper is to explore the influence of different size soil samples on resistivity.【Method】Taking the laterite in Yunnan area as the research object, the remolded laterite with different water content, dry density and geometric size was prepared. The relationship between the resistivity characteristics under different geometric sizes was studied, and a reasonable, reliable and suitable resistivity model for laterite with different geometric sizes was constructed.【Result】The results showed that under the same conditions, the resistivity decreases with the increase of water content, increases with the increase of porosity, and decreases with the increase of volumetric water content. The change of geometric size changes the pore structure and saturation distribution of the soil, causing the change of resistivity, showing the increase of geometric size and the increase of resistivity. Based on the change relationship of resistivity characteristics, a resistivity volumetric water content model suitable for different geometric sizes is constructed, and the model has high fitting accuracy.【Conclusion】This experiment provides a way and reference for the non-destructive, rapid and economical estimation of water content in laterite areas with size and volume differentiation by high-density electrical method. |
| Key words: resistivity; laterite; volume water content; geometric size; model |
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