ISO 17892-9:2018 岩土工程勘察和测试 土壤的实验室测试 第9部分：水饱和土的固结三轴压缩试验

标准编号：ISO 17892-9:2018

中文名称：岩土工程勘察和测试 土壤的实验室测试 第9部分：水饱和土的固结三轴压缩试验

英文名称：Geotechnical investigation and testing — Laboratory testing of soil — Part 9: Consolidated triaxial compression tests on water saturated soils

发布日期：2018-02

标准范围

ISO 17892-9:2018规定了水饱和土壤固结三轴压缩试验的方法。ISO 17892-9:2018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。圆柱形试样可包括原状土、重新压实土、重塑土或重塑土，在排水条件下承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。该试验可以确定剪切强度、应力-应变关系和有效应力路径。压缩时，所有应力和应变均表示为正值。注1:本文件提供了单个试样的试验。需要一组至少三个相关试验来确定这些试验的抗剪强度参数。评估结果的程序包含在附录B中，如果需要，抗剪强度参数将包含在报告中。特别程序，例如:a） 端部润滑试验；b） 多阶段试验；c） 零侧向应变（K0）固结试验；d） 局部测量应变或局部测量孔隙压力的试验；e） 无橡胶膜试验；f） 扩展测试；g） 在细胞压力变化的地方进行剪切，本程序未完全涵盖。然而，这些具体测试可参考本文件中描述的一般程序。注2:本文件符合EN 1997-1和EN 1997-2规定的岩土工程勘察和试验的固结三轴压缩试验要求。

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.

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