土粒比重试验比重瓶质量校准——线性拟合和多项式拟合曲线对比  

Mass Calibration of Pycnometer in Soil Particle Specific Gravity Test——Comparison of Linear Fitting and Polynomial Fitting Curves

作　　者：刘鹏华 曾利芳 袁仙红 杜宝林 苏伟航 Liu Penghua;Zeng Lifang;Yuan Xianhong;Du Baolin;Su Weihang(The Shenzhen Geological Bureau,Shenzhen,Guangdong 518028;Shenzhen Geology&Construction Company,Shenzhen 518028,China)

机构地区：[1]深圳市地质局,广东深圳518028 [2]深圳地质建设工程公司,广东深圳518028

出　　处：《广东化工》2021年第14期81-83,共3页Guangdong Chemical Industry

摘　　要：比重瓶法测土粒比重的关键,是准确得到温度与比重瓶、水总质量关系曲线。本文用线性拟合、多项式拟合温度与瓶、水总质量曲线,通过线性和多项式拟合方程式校准比重瓶,比较两者优劣。实验表明比重瓶校准,多项式拟合效果更好;土粒比重试验(比重瓶法)纯水水温保持在25~40℃时误差最小。The key to measuring the specific gravity of soil particles by Pycnometer method is to accurately obtain the relationship curve between temperature and the total mass of pycnometer and water. In this paper, To compare the advantages and disadvantages of linear fit and polynomial fitting, linear fitting and polynomial fitting are used to fit the curves of temperature and total mass of bottle and water. The results shows that,for the calibration of pycnometer, polynomial fitting is better. The soil grain proportion test(specific gravity bottle method) has the smallest error when the water temperature of pure water is kept at 25 to 40 ℃.

关 键 词：土粒比重 比重瓶校准 线性拟合 多项式拟合 

分 类 号：TU41[建筑科学—岩土工程]