標(biāo)準(zhǔn)號：ISO/TS 17892-7-2004
中文標(biāo)準(zhǔn)名稱：土工勘查和檢驗(yàn).土壤的實(shí)驗(yàn)室檢驗(yàn).第7部分:細(xì)粒土壤的無側(cè)限壓縮試驗(yàn)
英文標(biāo)準(zhǔn)名稱：Geotechnical investigation and testing - Laboratory testing of soil - Part 7: Unconfined compression test on fine-grained soils
標(biāo)準(zhǔn)類型：P13
發(fā)布日期：1999/12/31 12:00:00
實(shí)施日期：1999/12/31 12:00:00
中國標(biāo)準(zhǔn)分類號：P13
國際標(biāo)準(zhǔn)分類號：13.080.20;93.020
適用范圍：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.