<![CDATA[The development of tourism on the Lombok Island is increasing along with the development of the Mandalika Special Economic Zone (KEK), so that many homestay are built, both hotels and villas. One of the developing tourist areas around the KEK is the Grupuk area. One of the cases of land mass movement, namely the Sekeq Villa building which is located on a hilly slope with a slope ranging from 60° - 75 ° which has experienced geological symptoms. To prevent potential landslides on the slopes of Vila Sekeq, it is necessary to carry out an analysis of its stability and deformation. The method used is to study laboratory data and field data resulting from bore logs to obtain soil and rock characteristics. Furthermore, laboratory data and field data are used as input parameters in numerical simulations with Plaxis. Simulations were carried out with 2D idealization under plane strain conditions and using the Mohr-Coulomb model for subgrade. The retaining wall of the bore pile that extends at the foot of the slope with the material is approximated by a linear elastic model. Numerical simulations are carried out in pre-villa conditions, existing slope conditions and slope conditions after bore pile installation. Geometry models and subsurface bedding based on the stratigraphic soil layers resulted from geotechnical investigations consisting of sandy silt, silt, sandy silt and limestone breccias. Numerical simulation with Plaxis shows that the deformation from the existing condition to the bore pile installatio, condition has increased because the bore pile increases the load on the slope but the deformation increase is not too significant. The slope condition before the villa was stable because the safe number (SF) was 1.3587, then the slope stability in the existing condition was marked with a safe number (SF) 1.1878 so that the slope became unstable because SF was less than 1.2. To increase the safe number so that landslides do not occur, deep of bore pile is 12 meter installed, after the installation of the bore pile the safe number (SF) has increased to 1.2154 so that the slope becomes stable (safe).]]>
