Abstract：Research purposes: Being an important part of the soil test, the grain analysis test is a test to analyze the gradation of the soil grain size. This paper introduces the composition of soil grain and its testing methods, analyzes the causes of the testing errors and their consequences by focusing on the items and operating points during the grain analysis test. It is hoped to find proper solutions for the test to reduce or lower the errors, thus to make the test results be more similar to the true state of the soil.
Research conclusions: After analyzing causes of errors in the test, attention should be paid to the following points during the test :(1)A proper test method should be chosen aiming at the condition of soil samples; (2) Periodic metrological verification should be done for all the instruments and apparatus;(3)Test operators should be trained for updating of specifications and equipment，and they should operate strictly according to test specifications so as to minimize errors; (4) Precautions of grain analysis test proposed in this article have certain reference significance for reducing errors in grain analysis of soil tests.
曹晓娟. 关于颗粒分析试验的误差分析和对策研究[J]. 铁道工程学报, 2014, 31(2): 38-40.
CAO Xiao-juan. Study on the Errors and Countermeasures of Grain Analysis Test. 铁道工程学报, 2014, 31(2): 38-40.
Ren Liyuan, etc. Study of the Impact of Particle in Clayey soil on Densimeter Method in Grain Analysis Test [J]. Shandong Water Resources, 2008(10):7-10.
Xiao Jimin, etc. The Issues for Caution on Implement of Code for Rock and Soil Chemical Analyses for Railway Engineering[J]. Journal of Railway Engineering Society, 2009 (8):37-40.
2014, Vol. 31 
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