土工勘查和检验.土壤的实验室检验.第9部分:饱水土壤的三轴压缩试验

[中文适用范围]： 本文件规定了水饱和土固结三轴压缩试验的方法。 本文件适用于岩土工程勘察范围内压缩荷载下三轴剪切强度的实验室测定。 圆柱形样本可以包括未扰动的、重新压实的、重塑的或重构的土壤，在排水条件下经受各向同性或各向异性应力，然后在不排水或排水条件下剪切。 该测试可以确定剪切强度、应力-应变关系和有效应力路径。 所有应力和应变均表示为压缩时的正数值。 注 1：本文件提供了对单个样本的测试。 需要一组至少三个相关测试来确定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，并且如果需要，剪切强度参数也应包含在报告中。 特殊程序，例如： a) 带润滑端部的测试； c) 零横向应变（K0）固结试验； e) 无橡胶膜的试验； b) 多阶段试验； d) 局部测量应变或局部测量孔隙压力的试验； f) 延伸试验； g) 细胞压力变化时的剪切，未完全包含在该程序中。 不过，这些具体测试可以参考本文档中描述的一般程序。 注 2：本文件满足根据 EN 1997-1 和 EN 1997-2 进行岩土勘察和测试的固结三轴压缩试验的要求。 [外文原描述]： 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.