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Journal : Civil Engineering Journal

Compilation of Parameter Control for Mapping the Potential Landslide Areas P. A. Maha Agung; M. F. Rouf Hasan; Adi Susilo; Mustaffa A. Ahmad; Mohd. J. Bin Ahmad; U. A. Abdurrahman; A. T. Sudjianto; Eko Andi Suryo
Civil Engineering Journal Vol 9, No 4 (2023): April
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2023-09-04-016

Abstract

Batu Tourism City is located in a mountainous area, so based on information from the BNPB, it has quite a large potential for landslides. Landslide hazards can frequently disrupt public traffic due to road cuts. Landslide mapping digitally will contribute to handling and mitigation activities since the database can be updated in real time to anticipate landslide hazards. This study aims to map landslide-prone areas located in the Payung zone, Songgokerto Village, and Batu City. Landslide areas can be determined by mapping analysis using GIS software. GIS can determine the classification level for a landslide susceptible area. Some input data that will influence landslides, such as rainfall, wind, earthquakes, etc., was collected as the control parameters. All parts of the study area could be classified as areas with minor, medium, and major potential for landslides. Primary data are collected from geo-surveying (aerial images) using drone devices for interpretation of landslide susceptibility areas, geophysical to identify the type of soil or rock layers that completed their behavior, and slip planes as well using geo-electric, geotechnical engineering to predict slope stability with the correlation from cone penetration test (CPT) data, and geo-hydraulic to observe the rainfall and the catchment area model using the available secondary data. Geometrically, measurement data found that the average slope angle at the upper and lower of the East Java Province highway is around 40–50o. Studies from geophysical data identified that the hilly terrain in the object study area has been dominated by the weathered rock layer. Geotechnical data obtained shows the soil layers at the slope location will be stable with the water content under 35% during the dry season and may become unstable with the water content reaching over 50% due to the increase in saturation during the rainy season. The landslide that occurred was more caused by seepage behavior from surface water flow towards the sloping plane, and then the safety factor during the rainy season reached the critical values at SF = 0.58. During the dry season, the unsaturated process due to the temperature change generates a safety factor (SF) of more than 1.2. The compilation data produced maps of susceptible landslides and surface flow distribution. Doi: 10.28991/CEJ-2023-09-04-016 Full Text: PDF
Subsurface Analysis Using Microtremor and Resistivity to Determine Soil Vulnerability and Discovery of New Local Fault Adi Susilo; Alamsyah M. Juwono; Faridha Aprilia; Farizky Hisyam; Siti Rohmah; Muhammad Fathur Rouf Hasan
Civil Engineering Journal Vol 9, No 9 (2023): September
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2023-09-09-014

Abstract

Microtremor and geoelectrical resistivity surveys have been conducted in areas where the April 10, 2021, earthquake of 6.1 Mw caused the most damage. Wirotaman Village, Malang Regency, was one of the regions with the most extensive damage. This study aims to investigate the seismic vulnerability and subsurface conditions that result in severe damage at the research location. This study's Horizontal to Vertical Spectral Ratio Analysis (HVSR) curve was derived from the recorded microtremor signal in the frequency domain. The frequency parameter and amplification factor obtained from the curve are used to determine the seismic vulnerability index. In addition, a geoelectrical resistivity study with a dipole-dipole configuration was conducted at the site with the most extensive damage. The results of this study show the correlation between the results of the HVSR curve analysis and geoelectrical resistivity in determining the seismic vulnerability of an area. The results indicated that the high seismic vulnerability index value ranged from Kg= 12.0 to 18.0, with the most severe damage concentrated in the Southwest at SA 05 and SA 06. Based on the results of the geoelectrical survey, information was obtained that several points of damage to buildings at SA 05 (red circle) were on the same line, where this condition was associated with the possibility of new faults at that location. This microtremor and geoelectric resistivity investigation reveals thick sedimentary deposits with a high seismic vulnerability index and low resistivity. This study's findings can be utilized as a guide for micro zonation studies in research areas. This research contributes to the surrounding community in the form of disaster mitigation, where construction must avoid local fault positions that have been found to reduce the level of damage when natural geological disasters occur. Doi: 10.28991/CEJ-2023-09-09-014 Full Text: PDF
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.
Co-Authors A'isyah Salimah A. T. S. Azhar A. T. Sudjianto Achmad Achdan Annabil Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adinegara, Aldo W. Agung B. Broto Agung Budi Broto Agung Teguh Wibowo Almais Agung, P. A. Maha Agus Naba Agus Naba Ahmad Imron Rozuli Ahmad N. Faris Ahmad, Mustaffa A. Alamsyah M. Juwono Alamsyah M. Juwono Alamsyah M. Juwono Amalia Amalia Amalia Amalia Anggraeni, Ike Listya Anis Nurullaili Anis Rosyidah Anjar Pranggawan Azhari Aprilia, Faridha Arbad, Arliandy Pratama Ashari, Fadhil Muhamad Aunur Rofiq Aunur Rofiq Azzahro, Rossyda Bambang Setiahadi Budi Damianto Bunga Puspita, Mayang Daeng A. Suaidi Denny Yatmadi Denny Yatmadi Denny Yatmadi Didik Yudianto Dini Fitriani Dito Ibrahim Gumelar DYAH NURWIDYANINGRUM Eko Andi Suryo Faridha Aprilia Farizky Hisyam Ferdinal, Ferdinal Firdaus, Devan Maulana Germanus Tirta Tambing Gunawan, Fahdynia Karnira Habibiy Idmi, Mohammad Hakim, Meilia Aquina Hamdi Rifai Hapsoro, Cahyo Aji Hari Wisodo, Hari Hidayat, Lukman Hakim Hisyam, Farizky I Ketut Sucita Idmi, Mohammad Habibiy Imam H Sasongko Juwono, Alamsyah M. Karimah Karimah Kartikaningsih, Hartati Khuluq, Muhammad Husnul Komarruzaman, Abdul Razaq Linda Sari Wulandari M. I. S. Fazlina Maharani Pertiwi Koentjoro Mauludi Ariesto Pamungkas Mauludi Ariesto Pamungkas Mega Isnaeni Miftakhul Cahyati Mochammad Wafa Husain Mujtaba Mohammad Habibiy Idmi Mohd. J. Bin Ahmad Muhammad Gusti Alif Zuhry Hanafi Muhammad Nizam Zakaria Mustaffa A. Ahmad Mustaffa A. Ahmad Muwardi Sutasoma Nieske Ari Yunika Nur Aziza Putri Osa, Dominggus Benyamin P. A. Maha Agung Prastyo, Redy Eko Putera Agung Maha Agung Putri, Agustine Hanafi Razi, Mohd Adib Mohammad Riandi, Muhammad Alvaro Rinawati Rinawati Rinawati Rinawati Saffanatul Haniyyah Salimah, A’isyah Saputra, Jonathan Siti Rohmah Siti Zulaikah Solly Aryza Sri Herwiningsih Sri Sudaryanti, Sri Sukadi, Zefanya Nicko Sukarman Sukarman Sukir Maryanto Suripto Suripto Susilo, Adi SUTIKNO Sutrisno Sutrisno Sutrisno Sutrisno Swastirani, Astika Tri Widya Swastika Tri Widya Swastika, Tri Widya U. A. Abdurrahman Wiwik Handayani Yanuar Setiawan Yanuarini, Erlina Yelvi Yelvi Yoyok Adisetyo Laksono Yudianto, Didik Zainorabidin, Adnan