標準號：ISO 22476-3-2005
中文標準名稱：土工調查和檢驗.現場檢驗.第3部分:標準滲透性試驗
英文標準名稱：Geotechnical investigation and testing - Field testing - Part 3: Standard penetration test
標準類型：P13
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：P13
國際標準分類號：93.020
適用范圍：This document specifies requirements for indirect investigations of soil by standard penetration test as part of geotechnical investigation and testing according to EN 1997-1 and EN 1997-2 to compliment direct investigations (e.g. sampling according to prEN ISO 22475-1). The standard penetration test aims to determine the resistance of soils at the base of a borehole to the dynamic penetration of a split -barrel sampler and the recovering of disturbed samples for identification purposes (SPT). In gravelly soils and in soft rocks a solid cone is also be used (SPT(C)). The standard penetration test is used mainly to assess the strength and deformation parameters of cohesionless soils, but some valuable data may also be obtained in other soil types. The basis of the test consists in driving a sampler by dropping a hammer of 63,5 kg mass on to an anvil or drive head from a height of 760 mm. The number of blows (N) necessary to achieve a penetration of the sampler of 300 mm (after its penetration under gravity and below a seating drive) is the penetration resistance.