ISO 17892-9:2018规定了一种用于水饱和土壤三轴压缩试验的方法。 ISO 17892-9:2018适用于在岩土工程研究范围内的压缩载荷下三轴剪切强度的实验室测定。 可以包括未受干扰的，再压实的，重塑的或重构的土壤的圆柱形样本在排水条件下经受各向同性或各向异性应力，并且此后在不排水或排水条件下剪切。该测试允许测定剪切强度，应力 - 应变关系和有效应力路径。所有的应力和应变在压缩中被表示为正数值。 注1:本文件对单个试样进行了测试。需要一组至少三个相关测试来确定来自这些测试的剪切强度参数。评估结果的程序包含在附录B中，并且在需要时，剪切强度参数应包含在报告中。 特殊程序如: a）用润滑端测试; b）多阶段测试; c）零横向应变（K0）固结试验; d）用局部应变测量或局部孔隙压力测量进行测试; e）没有橡胶的测试膜; f）延伸测试; g）剪切细胞压力变化的地方， 在这个程序中没有完全覆盖。但是，这些特定的测试可以参考本文档中描述的一般程序。 注2:本文件符合EN 1997-1和EN 1997-2中关于岩土工程勘察和试验的三轴压缩试验的要求。

ISO 17892-9:2018 specifies a method for consolidated triaxial compression tests on water-saturated soils. ISO 17892-9:2018 is applicable to the laboratory determination of triaxial shear strength under compression loading within the scope of geotechnical investigations. The cylindrical specimen, which can comprise undisturbed, re-compacted, remoulded or reconstituted soil, is subjected to an isotropic or an anisotropic stress under drained conditions and thereafter is sheared under undrained or drained conditions. The test allows the determination of shear strength, stress-strain relationships and effective stress paths. All stresses and strains are denoted as positive numerical values in compression. NOTE 1 This document provides a test for a single specimen. A set of at least three relatable tests are required to determine the shear strength parameters from these tests. Procedures for evaluating the results are included in Annex B and, where required, the shear strength parameters are to be included in the report. Special procedures such as: a) tests with lubricated ends; b) multi-stage tests; c) tests with zero lateral strain (K0) consolidation; d) tests with local measurement of strain or local measurement of pore pressure; e) tests without rubber membranes; f) extension tests; g) shearing where cell pressure varies, are not fully covered in this procedure. However, these specific tests can refer to general procedures described in this document. NOTE 2 This document fulfils the requirements of consolidated triaxial compression tests for geotechnical investigation and testing in accordance with EN 1997‑1 and EN 1997‑2.