Determination of Slip Surface area using Geoelectric, MASW, and Soil Mechanics Data in Cimuncang Village, West Java

The research of soil movement has been conducted using resistivity method, MASW, and soil mechanical data in Cimuncang, Malausma, Majalengka. The research has done in order to know resistivity distribution value and shear wave velocity VS30, to determine and analyzing rock layers pattern, slip area depth through 2D and 3D modelling result, and analyzing slope Safety Factor (SF) based on soil mechanical laboratory testing. The estimation of resistivity value is done by applying resistivity modelling, the value is vary from 6–200 Ωm which the depth of slip area is 5–7 m. The estimation of shear wave velocity value is done by applying MASW modelling, the value is vary from 40–500 m/s which depth of slip area is about 5 m. The layer that used as slip area based on resistivity modelling is contact between clay (<25 Ωm) and tuff (25–75 Ωm), and based on MASW modelling that considered as slip area is between soft soil layer (VS <183 m/s) and stiff soil layer (VS 183–366 m/s). Based on Geoslope modelling gained slope Safety Factor (SF) is valued 1,26 in southeast that means the slope is relatively stable and in northwest is valued 0,98 that means the slope is unstable area.