标准编号：ISO 22476-3:2005
中文名称：土工技术 力场试验 第3部分：标准渗透试验
英文名称：Geotechnical investigation and testing — Field testing — Part 3: Standard penetration test
发布日期：2005-01
标准范围
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.
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