标准摘要
[中文适用范围]： ISO 17892 的这一部分规定了确定土壤粒度分布的方法。 ISO 17892 的这一部分适用于岩土工程调查范围内通过筛分或沉降或两者结合来实验室测定土壤样品的粒度分布。 粒度分布是土壤最重要的物理参数之一。 土壤的分类主要根据粒径分布。 土壤的许多岩土工程和地质水力学特性取决于粒度分布。 粒度分布允许根据细分为特定粒度类别来描述土壤。 每个类别的大小可以通过筛分和/或沉淀来确定。 粗粒土壤通常通过筛分进行分析，而细粒和混合粒土壤通常通过筛分和沉降相结合进行分析，具体取决于土壤的成分。 所述筛分方法可用于所有粒径小于125毫米的非胶结土。 描述了两种沉降方法：面积计法和移液管法。 注：ISO 17892 的本部分符合 EN 1997-2 确定晶粒尺寸分布的要求。 [外文原描述]： ISO 17892-4.2016 specifies a method of determining the particle size distribution of soils. ISO 17892-4.2016 is applicable to the laboratory determination of the particle size distribution of a soil test specimen by sieving, or sedimentation, or a combination of both within the scope of geotechnical investigations. The particle size distribution is one of the most important physical characteristics of soil. Classification of soils is mainly based on the particle size distribution. Many geotechnical and geohydrological properties of soil are related to the particle size distribution. The particle size distribution provides a description of soil based on a subdivision in discrete classes of particle sizes. The size of each class can be determined by sieving and/or sedimentation. Coarse soils are usually tested by sieving, but fine and mixed soils are usually tested by a combination of sieving and sedimentation, depending on the composition of the soil. The sieving method described is applicable to all non-cemented soils with particle sizes less than 125 mm. Two sedimentation methods are described: the hydrometer method and the pipette method. NOTE ISO 17892-4.2016 fulfils the requirements of the particle size distribution testing in accordance with EN 1997-2.
英文名称Geotechnical investigation and testing — Laboratory testing of soil — Part 4: Determination of particle size distribution