摘要： 为了研究粒径计法分析均匀细沙时沉降速率和沉降粒径产生误 差的原因和规律，从而实现对粒径计分析成果资料进行修正，本文中分 析了采用粒径计法分析均匀细沙时， 沉降速率和沉降粒径误差产生的 原因， 根据粒径计分析过程， 推导出沉降速率和沉降粒径理论计算公 式；通过实验资料与理论计算进行对比，总结出采用粒径计法分析均匀 细沙时沉降速率和沉降粒径误差分布规律。 

关键词：粒径计分析；均匀细沙；沉降速率；沉降粒径

Abstract：In order to study the reasons for errors and laws of sediment rate and sediment particle size in particle size analysis of the uniform sand and correct the results of the particle size analysis，the reasons of causing the settlement rate and settlement size errors during the particle size analysis of uniform sand were analyzed. The theoretical formulas for calculating the settlement rate and settlement size were derived according to the process of particle size analysis. The experimental data and the theoretical values were compared，and the errors distribution laws were summed for the sedi ment rate and sediment particle size in particle size analysis. 

Keywords：particle size analysis；uniform sand；sediment rate；settlement size