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All Journal REKAYASA AGREGAT Prosiding SNITP (Seminar Nasional Inovasi Teknologi Penerbangan) EPI International Journal of Engineering International Journal of Engineering, Science and Information Technology Extrapolasi AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Talenta Sipil International Journal Science and Technology (IJST) JITSi : Jurnal Ilmiah Teknik Sipil Journal Serambi Engineering (JSE) Jurnal Teknik Sipil Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Abdi Karya Sipil Proceeding of The International Conferences on Engineering Sciences
Karina Meilawati Eka Putri
Universitas Pembangunan Nasional Veteran Jawa Timur
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation

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Journal : agregat

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Analisis Evaluasi Tiang untuk Stabilisasi Lereng dengan Metode Elemen Hingga Dua Dimensi Karina Meilawati Eka Putri; Griselda Junianda Velantika; Rizqi Alghiffary; Elok Dewi Widowati; Muhamad Fauzan Akbari
AGREGAT Vol 11 No 1 (2026)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v11i1.31293

Abstract

Landslides due to slope instability are natural phenomena that can lead to substantial damage to infrastructure, loss of property, and human fatalities. Slope-stabilizing piles are among the most effective and widely used recently to increase slope stability. This paper presents an evaluation of slope-stabilizing piles using 2D finite element method (FEM), including a parametric study on the effects of pile diameter, pile spacing, and pile length on the pile responses, such as bending moment and deformation. The analysis conducted in this research employed the 2D FEM. FEM modeling was performed with the plane strain model and the Hardening Soil (HS) soil constitutive model. A parametric study was conducted by varying the pile parameters, such as pile length (12, 16, and 20 meters), diameter of pile (0.6, 0.8, 1.0, and 1.2 meters), and pile spacing (1.5D, 2D, 3D, and 4D). Based on the analysis results, pile length shows the most significant influence on slope stability; an increase in pile length is proportional to an increase of the factor of safety and bending moments but inversely proportional to the resulting deformation. On the other hand, pile diameter was found to have no significant impact on the improvement of the Factor of Safety in this study, although dimensional variations affect internal forces, specifically regarding deformation and bending moment distribution within the pile. Furthermore, increasing the spacing between piles tends to decrease the factor of safety because it weakens the soil arching mechanism, which subsequently increases deformation at the pile head. This research suggested that the optimization of slope stability is more dependent on the embedment length of pile and pile spacing rather than the pile diameter.
Analisis Komparatif Potensi Likuefaksi Menggunakan Metode Youd & Idriss dan Idriss & Boulanger Berdasarkan Data SPT M Naufal Ramadhan Naufal; Bagas Aryaseta; Karina Meilawati Eka Putri; Miguel Felix Wijaya
AGREGAT Vol 11 No 1 (2026)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v11i1.31444

Abstract

Indonesia is one of the countries with high levels of seismic activity because it lies at the junction of three major tectonic plates and along the Pacific Ring of Fire. These conditions make several regions, including the Special Region of Yogyakarta, vulnerable to earthquakes and their associated impacts, one of which is liquefaction. This study aims to analyze the potential for liquefaction in the Yogyakarta Toll Road Construction Project, Section 2, Package 2.1, Sleman, using the Youd & Idriss and Idriss & Boulanger methods based on Standard Penetration Test (SPT) data. The analysis was conducted at three borehole locations—BH-86, BH-89, and BH-93—selected because they have the highest groundwater levels, thereby representing the most critical conditions regarding the likelihood of liquefaction. Earthquake magnitude variations of 6, 6.3, and 7 were used in this study to evaluate the influence of magnitude on liquefaction potential at the study site. The analysis was conducted by calculating soil resistance parameters against liquefaction based on each method, then comparing the results for each borehole and earthquake magnitude variation. The analysis results indicate that an increase in earthquake magnitude leads to an increase in soil cyclic load and a decrease in the Safety Factor value, thereby increasing the potential for liquefaction. Soil layers located below the groundwater table exhibit higher vulnerability to liquefaction compared to those above it. A comparison of the results shows that both methods exhibit similar trends, namely that the potential for liquefaction increases as earthquake magnitude increases. However, the Idriss & Boulanger (2008) method generally yields lower Safety Factor values compared to the Youd & Idriss (2001) method, making it more conservative in evaluating liquefaction potential. Thus, this study demonstrates that variations in earthquake magnitude and differences in analytical methods influence the results of liquefaction potential evaluations at the study site.
Co-Authors Ali Zainal Abidin Isa Alhabsyi Alivia Wulan Yufika Arasi Arahman Aryaseta, Bagas Aulia Dewi Fatikasari Ayu Fatimah Sari Bambang Wasito Dian Purnamawati Solin Dimas Bagus Prasetyo Dwi Cahya, Maulana Zidan Elang Wijaya Kusuma Elok Dewi Widowati Fatika Putri Setianingsih Griselda Junianda Velantika Griselda Junianda Velantika Griselda Junianda Velantika Hendrata Wibisana Ifthar Ramadhana W Ika Salsabila Nurahida Karina Jelita Putri Kemal Aziz Khafidh, Syarif Nur M Naufal Ramadhan Naufal Miguel Felix Wijaya Muhamad Fauzan Akbari Rani Ardiansyah Ardjito Reguel Mikhail Rizqi Alghiffary Rizqi Alghiffary Sanhaji, Salsabila Faranande Septiono, Wisnu Panji Syahputra, Aldy Vio Aditya Pratama Wijaya