BS EN ISO 17892-4:2016规定了确定土壤粒度分布的方法。ISO 17892的本部分适用于粒度分布的实验室测定 在试验范围内，通过筛分、沉淀或二者的组合对土壤试样进行处理 岩土工程勘察。粒径分布是土壤最重要的物理特性之一。分类 土壤的粒径分布主要取决于土壤的粒径分布。许多岩土工程和地质水文 土壤的性质与粒度分布有关。粒度分布提供了基于离散类土壤细分的土壤描述 颗粒大小。每一类的大小可通过筛分和/或沉淀来确定。粗土 通常通过筛分进行测试，但细土和混合土通常通过筛分和 沉积作用，取决于土壤的成分。所述筛分方法适用于所有粒径小于 125毫米。描述了两种沉淀方法:比重计法和移液管法。注:ISO 17892的本部分符合以下要求的粒度分布测试: 与EN 1997-2合作。交叉引用:ISO 3310-1ISO 3310-2ISO 4788ISO 14688-1ISO 17892-1ISO 17892-3EN 1997-1EN 1997-2部分替代了BS 1377- 2:1990购买本文件时可获得的所有当前修订均包含在购买本文件中。

BS EN ISO 17892-4:2016 specifies a method of determining the particle size distribution of soils.This part of ISO 17892 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 This part of ISO 17892 fulfils the requirements of the particle size distribution testing in accordance with EN 1997-2.Cross References:ISO 3310-1ISO 3310-2ISO 4788ISO 14688-1ISO 17892-1ISO 17892-3EN 1997-1EN 1997-2Partially replaces BS 1377-2:1990All current amendments available at time of purchase are included with the purchase of this document.