标准摘要
[中文适用范围]： 本文件规定了通过增量加载在固结仪中测定土壤压缩特性的方法。 本文件适用于岩土工程调查范围内土壤压缩和变形特性的实验室测定。 固结试验在圆柱形试样上进行，试样由刚性环横向约束。试样受到离散的垂直轴向加载或卸载增量，并允许从顶部和底部表面轴向排水。试验可在未扰动、重塑、再压实或重构的试样上进行。 地基中的应力路径和排水条件通常是三维的，计算沉降量和沉降速率时可能出现差异。 试样的尺寸通常不能充分代表天然土壤中存在的结构特征。 固结试验的分析通常基于土壤饱和的假设。对于非饱和土壤，某些导出参数可能不适用。 注：本文件符合EN 1997-1和EN 1997-2中关于岩土工程调查和测试的固结仪中土壤压缩特性测定的要求。 [外文原描述]： 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.
英文名称Geotechnical investigation and testing — Laboratory testing of soil — Part 5: Incremental loading oedometer test