考虑尺寸效应的红黏土电阻率特性及其模型研究

杨昌文; 彭光灿; 贺壹婷; 刘征辉

引用本文:	杨昌文,彭光灿,贺壹婷,等.考虑尺寸效应的红黏土电阻率特性及其模型研究[J].灌溉排水学报,0,():-.
	YANG Changwen,Peng guangcan,He yiting,et al.考虑尺寸效应的红黏土电阻率特性及其模型研究[J].灌溉排水学报,0,():-.

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考虑尺寸效应的红黏土电阻率特性及其模型研究
杨昌文¹, 彭光灿², 贺壹婷³, 刘征辉⁴
1.长春工程学院;2.云南农业大学水利学院;3.云南农业大学;4.吉林省中部城市供水股份有限公司

摘要:

【目的】为探究不同尺寸土样对电阻率带来的影响。【方法】以云南地区红黏土为研究对象,制备不同含水率、干密度和几何尺寸的重塑红黏土,研究不同几何尺寸下电阻率特性变化关系,构建合理、可靠且适用于不同几何尺寸红黏土的电阻率模型。【结果】结果表明,相同条件下,电阻率随着含水率增加而降低,随着孔隙率增大而增大,随着体积含水率的增大而减小；几何尺寸的变化使土体孔隙结构和饱和度分布变化,引起电阻率变化,呈现几何尺寸增大,电阻率增大趋势；基于电阻率特性变化关系,构建适用于不同几何尺寸大小的电阻率体积含水率模型,该模型拟合精度高。【结论】该实验为高密度电法无损快速且经济的预估尺寸体积差异化的红黏土区域水分含量提供途径与参考。

关键词: 电阻率;红黏土;体积含水率;几何尺寸;模型

DOI：

分类号:P631

基金项目:吉林省科技发展计划项目（20210202010NC）

Study on Resistivity Characteristics and Model of Laterite Considering Size Effect

YANG Changwen¹, Peng guangcan², He yiting³, Liu zhenghui⁴

1.changchun institute of technology;2.College of Water Resources and Hydraulic Engineering,Yunnan Agricultural University;3.College of Big Data Translation，Yunnan Agricultural University;4.Jilin Province Central City Water Supply Co., Ltd,

Abstract:

【Objective】In order 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 show 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.