Gunawan Handayani
Soil liquefaction is a natural disaster triggered by an earthquake. This is an event where a sandy soil deposit loses its bearing capacity (effective stress becomes zero) due to earthquake shocks. Not all sandy soil deposits have the potential to liquefy if an earthquake occurs. Only sand deposits with a relatively low mass density can experience liquefaction. This is associated with the build-up of pore water pressure which can be the same as the overburden pressure so that the effective stress is equal to ZERO.
With a non-destructive test method, namely using seismic waves, we want to know the relationship between P and S wave velocities and their build-up. pore water pressure. If the relationship between wave velocities Vp and Vs and pore water pressure is obtained, it is hoped that we can estimate the liquefaction potential of sand deposits using the surface seismic method.
Looking for the relationship between P and S wave velocities and pore water pressure
If we know the relationship between P and S wave velocities and pore water pressure, then we can use non-destructive tests such as seismic methods to determine the liquefaction potential of a sand deposit if it is shaken by an earthquake.