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Journal : Civil Engineering Journal

Stability Analysis of Dike Pond Due to Pore-Water Pressure Changes Agung, P. A. Maha; Hasan, Muhammad Fathur Rouf; Yatmadi, Denny; Susilo, Adi; Sutikno; Osa, Dominggus Benyamin; Adinegara, Aldo W.; Razi, Mohd Adib Mohammad; Ahmad, Mustaffa A.; Zainorabidin, Adnan
Civil Engineering Journal Vol. 11 No. 8 (2025): August
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-08-017

Abstract

The Brigif retention pond not only serves to temporarily store rainwater for groundwater reserving but also reduces the risk of flooding in the Southern Jakarta area. Research was purposed to study two critical conditions of a dike made from clayey material from before to after water impounding stages correlating with its stability. The research will investigate pore-water pressure (u) parameter changes at any stage in both conditions. The parameter of (u) can be predicted (upre) using the laboratory consolidation or oedometer test and measured (uact) completely with hydrostatic pressure (u0) directly in the field. Actual measurements using a piezometer were also conducted on the body of the dike. The prediction analysis used the self-developed program and conventional geotechnical software. The critical peak depth of (u) was found at 3.0 to 4.0 m. The actual settlement potential values reached -0.10 to -1.42 m and matched the prediction result. Safety factor (SF) was around 2.0 to 4.0, or in stable condition. Research results found that the magnitude parameter of (u) could be influenced by groundwater flow and porosity or void ratio fluctuations. The consolidation process also would affect the physical soil pore, contributing to the change of (SF) the dike pond.
Subsurface Mapping and Geotechnical Design for Landslide Mitigation Hasan, Muhammad Fathur Rouf; Susilo, Adi; Sutan Haji, Alexander T.; Suryo, Eko Andi; Agung, P. A. Maha; Idmi, Mohammad Habibiy; Musta, Baba
Civil Engineering Journal Vol. 11 No. 9 (2025): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-09-015

Abstract

The landslide near the PT Molindo Incinerator Unit poses a significant threat to the facility’s structural integrity. Without immediate mitigation measures, the incinerator building is at risk of collapse, potentially impacting adjacent settlements due to cascading structural failures. To reduce the risk of further instability, urgent geophysical investigation is required to characterize the subsurface lithology and assess the groundwater table conditions. A geoelectrical resistivity survey was conducted using the Schlumberger configuration across 8 measurement points along a 100-meter survey line, with 10-meter electrode spacing. The resistivity measurements ranged from 3.30 to 25 Ωm, which were interpreted as clay-rich layers; 26 to 167 Ωm, corresponding to sandy clay; and 167 to 15,944 Ωm, indicating bedrock. The potential slip zone is interpreted at an average depth of 20 to 25 meters, indicated by very low resistivity values with resistivity values between 3.30 and 25 Ωm. Field observations confirmed that the landslide materials predominantly consisted of clay soils, distributed within two distinct layers beneath the incinerator unit. The combined depth of the clay and overlying sandy layers was estimated to reach approximately 20-25 meters from the ground surface. To ensure the effectiveness of structural mitigation, a retaining wall must be designed to extend beyond this depth threshold. Numerical simulations using Slope/W software indicated that soil nailing techniques yielded safety factors ranging from 1.32 to 1.81 under static conditions and 1.22 to 1.43 under dynamic conditions. Predicted deformations ranged from 0.01 to 0.02 meters (static) and 0.02 to 0.03 meters (dynamic). These results suggest that soil nailing is a viable reinforcement method to stabilize slope movements, particularly during periods of high rainfall. Additional recommended mitigation strategies include the installation of surface and subsurface drainage systems to control water flow, constructing retaining structures to serve as physical barriers to soil movement, and using vegetative cover to enhance slope stability.
Co-Authors Achmad Fakhrus Shomim, Achmad Fakhrus Adinegara, Aldo W. Agastya, Ida Bagus Oka Agung Teguh Wibowo Almais Agung, P. A. Maha Agus Naba Agus Pajrin Ahmad Hanif Al Fathoni, Ahmad Hanif Ahmad Luthfin Ahmad, Mustaffa A. Akhmad Jufriadi Alamsyah Muhammad Juwono ALathief Fashihullisan Andriansyah, M. Annabil, Achmad Achdan Aprilia, Faridha Asep Setiyo Budi Atok Yuliantono aunur rozaq B. Heri Purwanto Bagus Suryawan Bambang Aviantara Bambang Avianthara Barika Novanta Bunga Puspita, Mayang Chandra, Yuliana Iik Iswanti Dadan Dani Wardhana Denny Denny Yatmadi Deny Saputra Devita Fisas Riyanti Diah Ayu Chumairoh Dimas Pramudito Dipika Anggun Ardianti, Dipika Anggun Dolly Priatna dwi ajeng enggarwati Dwi Febriana Rochmah, Dwi Febriana Dwinanda, Indah Gumilang Eko Andi Suryo Fadly Usman Fajar Rakhmanto Fajrin, Rahma Annisa Fakhruddin, Fian Farid Hosni Faridha Aprilia Ganjar Sulastomo Gumelar, Dito Ibrahim Habibiy Idmi, Mohammad Halimah Halimah Hanafi, Muhammad Gusti Alif Zuhry Haniyyah, Saffanatul Hartiningtias, Diny Hermawan, Erwan Hetty Triastuty Hikhmadhan Gultaf Hisyam, Farizky Ibnu fajar sidik Idmi, Mohammad Habibiy Ilham Ilham indria restika anggraeni Intan Dewi Meutia Sari Juhari Juhari, Juhari Juwono, Alamsyah M Juwono, Alamsyah M. Kamali, Ahmad Byan Kardina, Dalendra Kevin Aulia Sandi Pratama Kukuh Suprayogi, Kukuh Kuni Azizah Lambertus Francisco Lestari, Santi Arum Puspita Maryanto - Mauludi Ariesto Pamungkas Mayang Bunga Puspita Moechammad Sarosa Monk, Kathryn A Mu'in, Fatkhul Muhajir Anshori Muhammad Fathur Rouf Hasan Muhammad Hendrasto Muhardi Muhardi Mujtaba, Mochammad Wafa Husain Muslih Udin Muslim, Teguh Musta, Baba Muwardi Sutasoma Nefrizal Nefrizal Nosevin Mangasi Onrizal Onrizal Osa, Dominggus Benyamin Pegatariana, I Ketut Ari Pratiwie, Dessy Lutfiani Putu Ayu Saraswati Razi, Mohd Adib Mohammad Rika Mayasyafa, Rika rizky gustiansyah Rofi Ridho Nurbilad, Rofi Ridho Rohana, Tatang Salman Hamja Siombone sania cahya maulida Sasmita Fidyaningrum Siti Jazimah Iswarin Sri Herwiningsih Sukir Maryanto Sunaryo - Surya Aji Ermanto Suryanto Suryanto Sutan Haji, Alexander T. SUTIKNO Teguh Suroso Titi Kalima Tri Deni Rachman Ulfah, Syarifatul Wasis M.AB, Wasis Wasis Wasis Wasis Wasis Welayaturromadhona Widyasandy, Dhony Yana Cahyana Yasa Suparman Yesika Wahyu Indrianti Yudianto, Didik Yunika, Nieske Ari Zainatul Afidah, Zainatul Zainorabidin, Adnan