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在确定工程现场粗粒料颗粒级配过程中,所取试样量大小是保证所得结果准确性及可靠性的决定性因素之一。结合抽样分析可靠性理论,提出了一种为确定粗粒料整体颗粒级配情况所需试样量的方法,发现颗粒总体含量、颗粒间尺寸差异性大小、精度要求是决定抽样量的3个因素。通过开展筛分试验,验证了方法的合理性,并将其应用于具体工程实践。所得结果可以为相关工程实践及规范的发展和完善提供参考。
In determining the grading process of coarse aggregate particles at the project site, the size of the sample taken is one of the decisive factors to ensure the accuracy and reliability of the obtained results. In combination with the reliability theory of sampling and analysis, a method for determining the sample size needed to determine the overall particle size distribution of coarse aggregate was proposed. The results showed that the total content of particles and the size difference between particles were large. The accuracy required was 3 factor. Through the screening test, the rationality of the method is verified and applied to specific engineering practice. The results can provide reference for the development and improvement of related engineering practices and norms.