| Cite this article: | 王海军,徐兴倩,赵熹,等.基于改进Topp模型的红黏土介电特性试验研究[J].灌溉排水学报,,():-. |
| wanghaijun,xuxingqian,zhaoxi,et al.基于改进Topp模型的红黏土介电特性试验研究[J].灌溉排水学报,,():-. |
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| Experimental Study on the Dielectric Properties of Laterite Based on the Improved Topp Model |
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wanghaijun1, xuxingqian1, zhaoxi1, quxin2, pengguangcan1, caibo1
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1.College of Water Conservancy，Yunnan Agricultural University;2.School of Civil and Construction Engineering, Anyang Institute of Technology
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| Abstract: |
| 【Objective】The sensitive factors of dielectric properties of laterite and the accuracy of improved Topp model are discussed, which provides a theoretical reference for the evaluation of water content of laterite under the climatic conditions of large temperature difference between day and night.【Method】Taking Yunnan laterite as an example, the dielectric characteristic tests with dry density, water content and temperature as variables were carried out to analyze the variation law of relative dielectric constant of laterite under different conditions. Considering the influence of key control factor temperature, the relative dielectric constant model of laterite was constructed to predict the water content. 【Result】 The relative dielectric constant of laterite are positively correlated with water content, temperature and dry density. The correlation of influencing factors is: water content > temperature > dry density. When the temperature was constant, the fitting accuracy of Topp model was higher ; when the temperature changes, the fitting accuracy of Topp model decreases significantly. 【Conclusion】The relationship between the relative dielectric constant () and the volumetric water content () fitted by the Topp model under different temperature conditions were quite different. The accuracy of the Topp model improved by introducing the temperature factor was significantly improved, and it has achieved good application effect for the evaluation of laterite water content. |
| Key words: Laterite; Relative dielectric constant; Dielectric properties; Influencing factor; Water content; Model |
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