| 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,2023,42(S1):70-75. |
| WNAG Haijun,XU Xingqian,ZHAO Xi,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,2023,42(S1):70-75. |
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| 摘要: |
| 【目的】探讨红黏土介电特性的影响因素并提升Topp模型精度。【方法】以云南红黏土为例，开展以干密度、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的变化规律，构建红黏土相对介电常数模型并对含水率进行预测。【结果】红黏土相对介电常数与含水率、温度、干密度呈正相关，影响因素的相关性程度依次为：含水率>温度>干密度。恒温条件下，Topp模型拟合精度较高；当温度发生变化时，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，引入温度改进后的Topp模型精度明显提高。 |
| 关键词: 红黏土；相对介电常数；介电特性；含水率 |
| DOI：10.13522/j.cnki.ggps. 2023001 |
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| Experimental Study on the Dielectric Properties of Laterite Based on the Improved Topp Model |
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WNAG Haijun, XU Xingqian, ZHAO Xi, QU Xin, PENG Guangcan, CAI Bo
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1. College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China;
2. School of Civil and Construction Engineering, Anyang Institute of Technology, Anyang 455000, China
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| Abstract: |
| 【Objective】Explore the influencing factors of the dielectric properties of laterite and improve the accuracy of the Topp model. 【Method】Taking Yunnan laterite as an example, the dielectric properties test with dry density, water content and temperature as variables were carried out. The variation law of relative dielectric constant of laterite under different conditions was analyzed. The relative dielectric constant model of laterite was constructed and the water content was predicted. 【Result】The relative dielectric constant of laterite are positively correlated with water content, temperature and dry density. The correlation degree of influencing factors is: water content > temperature > dry density. Under the condition of constant temperature, the fitting accuracy of Topp model is higher; when the temperature changes, the fitting accuracy of the 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 is quite different, and the accuracy of the Topp model improved by introducing temperature is obviously improved. |
| Key words: laterite; relative dielectric constant; dielectric properties; water content |
