ISO/TS 17892-7-2004 土工勘查和检验.土壤的实验室检验.第7部分:细粒土壤的无侧限压缩试验

标准号：ISO/TS 17892-7-2004
中文标准名称：土工勘查和检验.土壤的实验室检验.第7部分:细粒土壤的无侧限压缩试验
英文标准名称：Geotechnical investigation and testing - Laboratory testing of soil - Part 7: Unconfined compression test on fine-grained soils
标准类型：P13
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：P13
国际标准分类号：13.080.20;93.020
适用范围：This document covers the determination of an approximate value of the unconfined compressive strength for a square or cylindrical water-saturated homogeneous specimen of undisturbed or remoulded cohesive soil of sufficiently low permeability to keep itself undrained during the time it takes to perform the test within the scope of geotechnical investigations according to prEN 1997-1 and -2. The unconfined compressive strength of cohesive soils is a measure of the apparent cohesion. A cohesive soil behaves as if it is truly cohesive, e.g. clay and clayey soils, but most soils in this group behave cohesively due to negative pore pressure and friction and not due to actual cohesion. This test method is useful to derive the undrained shear strength of soil. It should however be noted that no provisions are taken to prevent drainage. The derived value for undrained shear strength is therefore only valid for soils of low permeability, which behave sufficiently undrained during testing. The method is not appropriate for fissured or varved clays or silts or peats.