ISO 17892-5:2017规定了通过增量负荷测量土壤压缩特性的方法。 ISO 17892-5:2017适用于岩土工程勘察范围内土壤压缩变形特征的实验室测定。 测厚仪测试在圆形测试样品上进行，该试样被刚性环横向限制。样品经受垂直轴向加载或卸载的离散增量，并允许从顶部和底部表面轴向排出。测试可以在不受干扰，重新组装，重新压实或重构的样品上进行。 地基的应力路径和排水条件通常是三维的，并且在沉降的大小和沉降速率的计算值中可能发生差异。 样品的小尺寸通常不足以代表天然土壤中存在的织物特征。 固结试验的分析通常基于土壤饱和的假设。在不饱和土壤的情况下，一些衍生参数可能不合适 注意本文件满足了岩土测厚仪土壤压缩特性的确定要求

ISO 17892-5:2017 specifies methods for the determination of the compressibility characteristics of soils by incremental loading in an oedometer. ISO 17892-5:2017 is applicable to the laboratory determination of the compression and deformation characteristics of soil within the scope of geotechnical investigations. The oedometer test is carried out on a cylindrical test specimen that is confined laterally by a rigid ring. The specimen is subjected to discrete increments of vertical axial loading or unloading and is allowed to drain axially from the top and bottom surfaces. Tests may be carried out on undisturbed, remoulded, recompacted or reconstituted specimens. The stress paths and drainage conditions in foundations are generally three dimensional and differences can occur in the calculated values of both the magnitude and the rate of settlement. The small size of the specimen generally does not adequately represent the fabric features present in natural soils. Analysis of consolidation tests is generally based on the assumption that the soil is saturated. In case of unsaturated soils, some of the derived parameters may not be appropriate NOTE This document fulfils the requirements of the determination of the compressibility characteristics of soils in the oedometer for geotechnical investigation and testing in accordance with EN 1997?1 and EN 1997?2.