Bagus Jaya Santosa, Ayi Syaeful Bahri, Sungkono : Combination of Active and Passive Seismic Analyses for Embankment
Prof.Dr. Bagus Jaya Santosa
Ayi Syaeful Bahri S.Si., M.T.
Applied Mechanics and Materials
Embankment Rayleigh wave shear wave velocity
Rayleigh wave dispersion is intensively used to determine near surface of shear wave
velocity (Vs). The method has been known as non-invasive techniques which is costly effective and
efficient to characterize subsurface. Acquisition of the Rayleigh wave can be approached in two
ways, i.e. passive and active. Passive seismic is accurate to estimate dispersion curve in low
frequency, although it is not accurate for high frequency. While active seismic is vice versa of
passive seismic. The high frequency of Rayleigh wave dispersion reflects to near surface and vice
versa. Therefore, we used the combination of both passive and active seismic methods to overcome
the limitations of each method. The shear wave velocity (Vs) which is resulted by inversion of the
combining data gives accurate model if compared to log and standard penetration test (N-SPT) data.
Further, the approach has been used to characterize LUSI (Lumpur Sidoarjo) embankments. The
result shows that embankment material (0-12 m) has higher Vs than that lower embankment