| 引用本文: | 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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| 摘要: |
| 【目的】探讨红黏土介电特性敏感因素及改进Topp模型精度，为昼夜温差较大气候条件下红黏土含水率的评价提供理论参考。【方法】以云南红黏土为例，开展干密度、含水率、温度为变量的介电特性试验，分析不同条件下红黏土相对介电常数变化规律，考虑关键控制因子温度的影响，构建红黏土相对介电常数模型对含水率进行预测。【结果】红黏土相对介电常数与含水率、温度、干密度均呈正相关，影响因素的相关度依次为：含水率>温度>干密度。当恒温时，Topp模型拟合精度较高；当温度变化时，Topp模型拟合精度显著降低。【结论】不同温度条件下Topp模型拟合得到的相对介电常数（）与体积含水率（）的关系存在较大差异，引入温度因素改进后的Topp模型精度明显提高，用于红黏土含水率评价取得较好的应用效果。 |
| 关键词: 红黏土；相对介电常数；介电特性；影响因素；含水率；模型 |
| DOI： |
| 分类号:S152 |
| 基金项目:云南省基础研究计划面上基金项目(202101AT070271)；云南省高层次人才培养支持计划“青年拔尖人才”专项(徐兴倩)；国家自然科学基金项目(41867040)；云南省教育厅科学研究基金项目(2023Y1017) |
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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 |
