Rofiq F. Awal, Selly Feranie, Adrin Tohari, Dadan D. Wardhana
A toll bridge was constructed in an old landslide zone in the Cikareteg area in Bogor, West Java. Knowledge of the slip surface is necessary to mitigate the hazard associated with the possible reactivation of the landslide. This paper presents the results of the resistivity tomography survey conducted in the vicinity of the toll bridge using dipole-dipole configuration to estimate the depth and geometry of the slip surface of the old landslide. Results of the resistivity tomography indicate that the non-circular sliding zones are located within a thick soil layer of low resistivity values at a depth of less than 10 m below the slope surface. The resistivity images also suggest that the groundwater table exists at shallow depth in the landslide masses. Thus, the thick landslide materials and shallow groundwater table in the vicinity of the bridge pose an imminent landslide hazard to the toll road. © 2023 AIP Publishing LLC.
Laboratory of Earth and Space Science, Physics Department, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudhi No. 229, Bandung, Indonesia; Research Center for Geotechnology, National Research and Innovation Agency (BRIN), Bandung, Indonesia
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