## Overburden Correction for Shear Wave Velocity

## Overburden Correction for Shear Wave Velocity

(OP)

Determination of Liquefaction Susceptibility/Potential may involve utilization of shear wave velocity which is corrected for overburden stress.

My question is why/how is shear wave velocity impacted by overburden stress and why is a correction necessary (I cannot rationalize this in my mind)? Seems like if the shear wave velocity is higher at depth, then the soil/sands would be stiffer (more dense).

My question is why/how is shear wave velocity impacted by overburden stress and why is a correction necessary (I cannot rationalize this in my mind)? Seems like if the shear wave velocity is higher at depth, then the soil/sands would be stiffer (more dense).

## RE: Overburden Correction for Shear Wave Velocity

(Empirically, shear modulus is roughly proportional to (sigma'v)^0.5 By theory of elasticity, SWV is proportional to (shear modulus)^0.5. Therefore, SWV is roughly proportionals to (sigma'v)^0.25.)

I think I got that right, without taking time to look it up.