<p><p><strong>Reference(s):</strong></p><p><em>Gohl et al. (2000)<br>Narin van Court and Mitchell (1994a)</em></p><p><strong>Method Summary</strong></p><p>Standard Penetration Tests (SPTs) should be performed before and after the test and production blasts to ensure that the specified ground improvement has occurred. As with CPTs, there may need to be a time lapse between the end of the blasting densification program and performing SPTs because experience has shown that the penetration resistance of the soil usually increases with time.</p><p><strong>Accuracy and Precision</strong></p><p>In certain soil conditions, SPTs can produce acceptable estimates of soil properties through correlations.</p><p><strong>Adequacy of Coverage</strong></p><p>SPTs can be performed at locations specified by the engineer. At least one SPT should be performed every 2000 m².</p><p><strong>Implementation Requirements </strong></p><p>SPTs are commonly used in geotechnical investigations and are relatively inexpensive and easy to perform.</p><p><strong>General Comments</strong></p><p>Standard penetration test are applicable in all blasting densification programs, provided the soil being densified does not contain excessive amounts of gravel or cobbles.</p></p>