Standard penetration test procedure

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Standard Penetration Test Geotechdata. This article is about testing of geotechnical properties of soil. Although this is not a standard penetration test, and should not be regarded as such, it may at least give an indication as to whether the deposit is really as loose as the standard test may indicate. The SPT is used to provide results for empirical determination of a sand layer's susceptibility to soil liquefactionbased on research performed by Harry Seed, T. In certain circumstances, it can be useful to continue driving the sampler beyond the distance specified, adding further drilling rods as necessary. Penetration tests and bearing capacity of cohesionless soils. Public Works Research Institute.

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Correlation between SPT-N value, friction angle, and relative density

The first 6 inches is considered as seating drive. Views Read Edit View history. The consistency of clayey soils can often be estimated from this test. The number of blows required for the last two intervals are added to give the standard penetration number at that depth. Water should be added as necessary to maintain the water table level in the bore hole. Soil liquefaction Response spectrum Seismic hazard Ground—structure interaction.

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