Preparation of the non-cohesive soil sample and calibration of the pneumatical launcher in the dynamic soil test SHPB

The paper analyzes the problem of initial compaction a non-cohesive soil sample on example dry silty sand samples. Two different methodologies were used: I) dynamic - using split Hopkinson pressure bar and II) vibration vibrating shaker. A better result process was obtained for with an value 0.5 (small difference in both methods comparable results). also includes numerical analysis calibration pneumatic launcher Matlab environment basis system equations. carried out range from to 3.0 three variants bar-projectile length: 100 mm, 200 mm 250 compared experimental results consistent.