APPLICATION OF SURFACE WAVE METHOD TO HAZARD REDUCTION:A CASE STUDY IN HONG KONG

摘要

A case study in Hong Kong has demonstrated the potential application of the surface wave method to slope safety assessment. In the study, CSW measurements using frequency from 6 Hz to 100 Hz was conducted. The phase velocity results were inverted to obtain shear wave vdocity and shear modulus profiles. Subsequent geotechnicsl investigation provided drillhole data at two locations that were consistent with the inversion model results. The uppermost colluvium layer was found to be about 5 m thick at the two locations and has a shear modulus of 200 - 500 MPa.The method is quick, portable and non- invasive, and may be applied in terrain at where drilling is difficult.