基于细粒含量和孔隙比的砂砾石渗透系数估算方法  

Estimation Method of Permeability Coefficient of Gravel Based on Fine Grain Content and Pore Ratio

作　　者：谷思宇 宋彦辉[1,2] 冯满 GU Si-yu;SONG Yan-hui;FENG Man(School of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,China;Key Laboratory of Western Mineral Resources and Geological Engineering Ministry of Education,Xi’an 710054,China)

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]西部矿产资源与地质工程教育部重点实验室,陕西西安710054

出　　处：《水电能源科学》2025年第2期84-87,共4页Water Resources and Power

基　　金：中央高校研究基金项目(300102269202)。

摘　　要：砂砾石的渗透系数与土中矿物成分、颗粒级配、颗粒形状、干密度、孔隙比、温度、渗透液性质等有关,基于相关工程中已有数据,通过回归分析得出细粒含量与渗透系数相关性很好,两者呈非线性幂函数关系,相关系数0.9053,细粒含量和孔隙比双因素与渗透系数呈光滑的圆弧面,相关系数0.7525。对青海茨哈峡水电站坝体料源区的砂砾石进行室内渗透性试验,验证了所建公式较好地适用于不同孔隙比和不同级配的砂砾石,可供类似工程借鉴。The permeability coefficient of gravel is related to the mineral composition of the soil,particle gradation,particle shape,dry density,pore ratio,temperature,permeable fluid properties,etc.Based on the existing data in the relevant projects,regression analysis results show that the correlation between the fine grain content and the permeability coefficient was good;The relationship between the two is nonlinear power function with a correlation coefficient of 0.9053;The two factors of fine particle content and pore ratio have a smooth circular surface with the permeability coefficient,and the correlation coefficient is 0.7525.An indoor permeability experiment was carried out with gravel from the material source area of Qinghai Ciha-Gorge Hydropower Station to verify the applicability of the established formula.The results show that the formula can be applied to gravel with different pore ratio and particle size distribution,and can be used for similar projects.

关 键 词：砂砾石 细粒含量 孔隙比 渗透系数 经验公式 

分 类 号：TV139.1[水利工程—水力学及河流动力学] TU411.4[建筑科学—岩土工程]