高岭土-砂土混合介质电导率预测模型适用性及误差评估  

Applicability analysis and error evaluation of conductivity prediction models for kaolinite-sand mixed media

作　　者：梁美洁 柏巍[2] 孔令伟[2] 王勇[2] 李科 岳秀 LIANG Meijie;BAI Wei;KONG Lingwei;WANG Yong;LI Ke;YUE Xiu(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232000,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China;College of Water Resources and Architectural Engineering,Northwest Agriculture and Forestry University,Xianyang 712100,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232000 [2]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [3]西北农林科技大学水利与建筑工程学院,陕西咸阳712100

出　　处：《辽宁工程技术大学学报（自然科学版）》2024年第3期296-303,共8页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(41772339,51979269,52127815)。

摘　　要：为提高电导率预测模型对岩土体结构性质的反演精度,以不同黏土质量分数的高岭土-砂土混合介质为研究对象,测定其在不同孔隙液下的电导率。根据参数获取途径,将现有电导率预测模型分为拟合模型和经验模型,通过拟合计算得到各模型的电导率预测值,与实测值对比并建立误差评估体系。研究结果表明:对于高岭土-砂土混合介质,拟合模型的电导率预测效果优于经验模型。在经验模型中,不同黏土质量分数下广义Archie模型的预测值均大于实测值,在使用广义Archie模型进行电导率预测时,需进行修正和调整;Waxman-Smits模型适用于预测低黏土质量分数下混合介质的电导率;修正的Archie模型对中等黏土质量分数下混合介质的电导率预测效果较好;Rhoades模型对高黏土质量分数下混合介质的电导率预测效果最佳。In order to improve the inversion accuracy of the conductivity prediction model for the structural properties of rock and soil,the conductivity of kaolin-sand mixed media with different clay mass fractions was measured under different pore fluids.According to the way of parameter acquisition,the existing conductivity prediction models are divided into fitting models and empirical models.The conductivity prediction values of each model are obtained by fitting calculation,and the error evaluation system is established by comparing with the measured values.The research results show that for kaolin-sand mixed medium,the prediction effect of the fitting model is better than that of the empirical model.In the empirical model,the predicted values of the generalized Archie model under different clay mass fractions are greater than the measured values.Therefore,when using the generalized Archie model for conductivity prediction,it is necessary to correct and adjust.The Waxman-Smits model is suitable for predicting the conductivity of mixed media with low clay mass fraction.The modified Archie model has a good prediction result for the conductivity of the mixed medium with medium clay mass fraction.The Rhoades model has the best prediction effect on the conductivity of the mixed medium under high clay mass fraction.

关 键 词：高岭土-砂土混合介质 电导率 黏土质量 预测模型 误差评估 

分 类 号：TU411[建筑科学—岩土工程]