Drilling and Insitu Tests

Standard Penetration Test (SPT)

Standard penetration test (SPT) is performed by dropping a safety hammer weighting approximately 63 kgf from 762 mm height. The SPT test is performed as per ASTM D-1586, the SPT/N blow counts are recorded at the specified depths and representative and undisturbed samples are also taken from these depths. The SPT sampler has an outer diameter of 50.8 mm, a constant inner diameter of 35 mm and a total length of 600 mm.