The required effect of any deep compaction technique can be set directly in terms of measured cone resistance, or in terms of “equivalent relative density”.
   
 
Pressuremeter and the seismic cone
   

Other analytical approaches that utilise the CPT platform for compliance testing of deep compaction projects include the full displacement push pressuremeter and the seismic cone.
 

The shear wave velocity obtained from the seismic cone, like the pressuremeter, can be directly related to the small strain shear modulus (Go), and is therefore a direct measure of the soil stiffness. Hence, a compaction specification of compliance criterion could also include a minimum normalized shear wave velocity, or the pressuremeter limit pressure.
  
 
Liquefaction potential
 

A further advantage in earthquake prone geographic regions, is that the shear wave velocity can be used as an additional measure of liquefaction potential, especially in silty sands.