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Journal : IJOG : Indonesian Journal on Geoscience

The Sliding Surface Determination of A Deep-seated Landslide on Cisumdawu Highway, West Java, Based on The Electrical Resistivity Tomography Santosa, Imam; Sulaksana, Nana; Yuningsih, Euis Tintin; Zakaria, Zufialdi
Indonesian Journal on Geoscience Vol. 11 No. 2 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.2.189-199

Abstract

Sumedang is one of the regencies in West Java Province that usually experiences landslides due to its lithology, slopes, and water level conditions. Previously slow-moving landslides occurred between 2016 and February 2021, affected the new Cileunyi-Sumedang-Dawuan (Cisumdawu) Highway at Section 2, Station 21 in the North Sumedang District. This research aims to identify the causes of these landslides using a combination of geological field observation, subsurface geo-electric resistivity-based survey, and borehole drilling. A total of fourteen boreholes were drilled to collect geotechnical data from the subsurface of the researched area, including the soil material and N-SPT value. The soil hardness and resistivity were measured and compared to establish the relationship between resistivity and engineering properties. The result of the resistivity measurement showed that the percolating water zone in the permeable loose soil was located above the impermeable layer, estimated as a slip surface. The subsurface measurement and borehole data show that the lithology of the sliding surface is a layer of clay with a thickness of 5 - 12 m, the slope of the sliding surface is 20o, and the depth is between 24 - 26 m. The cover layer of the sliding surface is a layer of silty clay and gravelly clay with a thickness of 5 - 10 m. Thus, based on the data presented, installation of bore piles and groundwater level monitoring need to be done as mitigation efforts.
Co-Authors abdullah, Fajar Abu Abdillah Ali, Abu Abdillah Adiwijaya, Annisa Ayungingtyas Pratiwi Adriansyah, Yan Agung Mulyo Alam, Boy Yoseph Cahya Sunan Sakti Syah Alpionisa, Salsabila Nur Andriani, Tati Andriani, Tati APRILIAN, YOGA Arie Afriadi Asykarulloh, Abdul Wahid Aton Patonah, Aton Bakhtiar, Taufiq Basuki, Jodi Prakoso Bustomi, Zhafran Muhammad Asyam Chaniago, Aulia Eka P S Chen, Reynara Davin Dicky Muslim Emi Sukiyah Ersyari, Jodistriawan Euis Tintin Yuningsih Firmansyah, M. Nizar Hendarmawan Hendarmawan, Hendarmawan Heriwaseso, Anjar Imam Santosa Irvan Sophian Irvan Sophian, Irvan Ismawan Ismawan, Ismawan Iyan Haryanto, Iyan Jakah, Jakah Johanes Hutabarat Khoirullah, Nur Kristiawan, Yohandi Luthfan H. Jihadi, Luthfan H. Luthfan Harisan Jihadi, Luthfan Harisan MANIK, VITO ARISTO Mubarak, Aziez Muhammad Bey Anural, Muhammad Bey Muhammad Kurniawan Alfadli Mursito, Anggoro Nana Sulaksana NINGRUM, WIWIN JUNITA Oscar, Agus Wiramsya Oscar, Agus Wiramsya Pajrin, Ulfia Sari Pradnya Paramarta Raditya Rendra Putra, Rafino Kurnia Putri, Revena Denia Raden Irvan Sophian, Raden Irvan Rahmi, Nisa Shafira Muthia Ramsof, Rani Amalia Retnoningtyas, Widya Ika Rizky Narendra Utomo, Rizky Narendra Rukmana, Yanwar Yusup Sabila, Zahra Syahida Seraphine, Nadhirah Seru, Imanuel Seru, Imanuel Shafira, Nisa Siahaan, Yakub Sidarto Sidarto Sihotang, Josua Washington Sulastri, Murni Sumarnadi, Eko Sumaryono Sumaryono Taufiq, Mochamad Muslim Ulhaque, Thaha Rizal Wicaksana, Kintan Adelia Arum Wicaksono, Danny Wiguna, Purwa Yogi Prianda, Yogi Yohanes Tan, Yohanes Yuda, Himmes Fitra Yusi Firmansyah, Yusi Yusuf, Muhammad Farhan