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All Journal Jurnal Teknik ITS Jurnal Fisika Unand REKAYASA PENA SAINS Jurnal Geosaintek Journal of Advanced Civil and Environmental Engineering RACIC : Rab Construction Research AGREGAT SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan EPI International Journal of Engineering Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Advance Sustainable Science, Engineering and Technology (ASSET) Journal of Civil Engineering Science & Technology (CI-TECH) Jurnal Abdimas Bina Bangsa Jurnal Teknik Sipil AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) KERN : Jurnal Ilmiah Teknik Sipil Jurnal Talenta Sipil Dharma: Jurnal Pengabdian Masyarakat Science and Education Journal International Journal of Mechanical, Electrical and Civil Engineering Advance Sustainable Science, Engineering and Technology (ASSET) Media Konstruksi : Jurnal Ilmiah Teknik Sipil Jurnal Geosaintek
Aryaseta, Bagas
Universitas Pembangunan Nasional Veteran Jawa Timur
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Journal : agregat

 1 
Penelitian Bagas Aryaseta
AGREGAT Vol 8 No 1 (2023)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v8i1.15682

Abstract

Penelitian Bagas
Analisis Potensi Likuifaksi Menggunakan Data CPT (Cone Penetration Test) Studi Kasus Proyek Konstruksi Tangki Bahan Bakar di Masohi Arifah Ismi Ambiya; Yerry Kahaditu Firmansyah; Bagas Aryaseta; 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.v11i1.31289

Abstract

The Maluku Province is a region with high seismicity that is vulnerable to liquefaction hazards, particularly in coastal areas with shallow groundwater levels and saturated soil conditions. This study aims to analyze soil behavior indices and liquefaction potential at the construction site of a fuel tank in Masohi, Central Maluku, using Cone Penetration Test (CPT) by comparing the methods of Cetin (2004) and Idriss–Boulanger (2014), as well as comparing the results with previous research by Latifi et al. (2023) using the methods of Olsen (1997), Juang (2003), and Robertson (1998) under different soil conditions. The classification results indicate a dominance of silty clay soils that are potentially susceptible to liquefaction. In the Masohi case study, relatively similar CSR patterns were obtained; however, the Idriss–Boulanger (2014) method yielded higher CSR values compared to the Cetin (2004) method. The CRR analysis revealed significant differences; the Idriss–Boulanger method exhibits higher sensitivity to changes in soil type and parameters, whereas the Cetin method tends to produce more stable values. A similar finding was observed in the study by Latifi et al. (2023), which demonstrated that soil characteristics and calculation formulations result in varying analysis outcomes across methods regarding liquefaction potential as indicated by CRR values.
Analisis Perbaikan Tanah Lunak Pada Proyek Pembangunan Jalan Tol Probolinggo-Banyuwangi Paket 3 Dengan Berbagai Alternatif Metode Perbaikan Tanah Muhammad Salman Mukhtar; Yerry Kahaditu Firmansyah; Bagas Aryaseta; 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.v11i1.31388

Abstract

The construction of Probolinggo–Banyuwangi Toll Road Package 3 faces geotechnical challenges due to variations in the thickness of compressible soft soil layers, which may cause excessive settlement and embankment instability. This study aims to analyze the influence of existing soil conditions on settlement and embankment stability and to determine the most appropriate ground improvement methods based on variations in compressible soil thickness. The research employed a quantitative method using secondary data, including Standard Penetration Test (SPT) data, embankment material parameters, ground improvement parameters, and seismic data for pseudostatic analysis. The N-SPT values were corrected and correlated into soil parameters, which were then modeled using PLAXIS 2D finite element software with the Hardening Soil model. The analysis results indicate that at STA 42+675, with a soft soil thickness of 5.5 m, the settlement difference under existing conditions was 16.22 cm and was successfully reduced to 7.9 cm after applying a combination of bamboo piles and bamboo mattress. At STA 45+700, with a soft soil thickness of 12 m, the existing condition experienced collapse during the embankment construction stage, whereas the combination of Prefabricated Vertical Drain (PVD) and preloading produced stable conditions with a settlement difference of 6.54 cm and a seismic safety factor of 1.375. This study concludes that selecting ground improvement methods based on the thickness of compressible soil layers can effectively improve embankment stability and control settlement.
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.
Analisis Pengaruh Variasi Laju Penimbunan terhadap Deformasi Lateral Tanah Lunak pada Metode Preloading dengan PVD (Studi Kasus Jalan Tol Pekanbaru–Padang STA 10+400) Dini Oktavia; Dian Purnamawati Solin; Bagas Aryaseta
AGREGAT Vol 11 No 1 (2026)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v11i1.31516

Abstract

Construction of embankments on soft soil often encounters stability issues due to low shear strength and high compressibility, particularly when the loading rate is not properly controlled. This study aims to analyze the effect of embankment loading rate on lateral deformation behavior of soft soil improved using preloading combined with Prefabricated Vertical Drains (PVD). The research is based on a case study of the Pekanbaru–Padang Toll Road STA 10+400. The methodology involves numerical analysis using the Finite Element Method (FEM), preceded by manual calculations to determine staged loading scenarios with target degrees of consolidation. Three loading rates were evaluated, namely 0,2; 0,3 and 0,4 m/week. The analysis focuses on settlement, safety factor, and lateral deformation. The results indicate that all loading rate variations produce similar final settlements (approximately 3,7 m) and meet the required degree of consolidation. However, significant differences are observed in lateral deformation and stability. Lower loading rates result in smaller lateral deformation and higher safety factors, indicating improved stability performance. Conversely, higher loading rates generate greater excess pore water pressure, leading to increased lateral deformation and reduced stability margins. It can be concluded that controlling the loading rate plays a critical role in minimizing lateral deformation and ensuring embankment stability on soft soil. A lower loading rate is more effective in providing sufficient time for consolidation and strength gain, thereby improving overall performance.
Co-Authors Achmad Dzulfiqar Alfiansyah Amien Widodo Arifah Ismi Ambiya Arzalia Novia Putri Aulia Dewi Fatikasari Bima Hanggara Nasrullah Bobby Ardianto Dian Purnamawati Solin Difha Trisadi Dini Oktavia Dini Oktavia Dwa Desa Warnana Evan, Faishal Faishal Evan Fatikasari, Aulia Dewi Femmy Kindanti Fithri Estikhamah Fithri Estikhamah Fithri Estikhamah Fithri Estikhamah Hendrata Wibisana Hendrata Wibisana Hendrata Wibisana Himatul Farichah Ifthar Ramadhana Wahyudi Jovanda Anggie Hirza Rivansyah Julian Tri Kurnia Utomo Karina Meilawati Eka Putri Lia Nirawati M Naufal Ramadhan Naufal Miguel Felix Wijaya Miguel Felix Wijaya Miguel Felix Wijaya Minarni Nur Trilita Moch. Syahrul Mochammad Fahreeza Yuniar Effendi Muhammad Ainun Nashrul Majid Muhammad Farid Abdillah Muhammad Fauzi Jatmiko Muhammad Rafli Bimo Prasetyo Muhammad Salman Mukhtar Naufal Angger Wasesa Nia Dwi Puspitasari Nur Aini Fauziyah Pardi Sampe Tola Primasari Cahya Wardhani Putri, Arzalia Novia Sakinah Sakinah Sakinah Sakinah Siti Fauziah Siti Zainab Siti Zainab Siti Zainab, Siti Syahrul Munir Syahrul Munir Syahrul Munir Tri Anggono Prijo Tri Anggono Prijo, Tri Anggono Wahyuni Wahyuni Widya Rachma Wulan Wulan, Widya Rachma Yerry Kahaditu Firmansyah Yudhistira Rizky Al Ikhsani Zakiyah Dania Billah Zakiyah Dania Billah Zetta Rasullia Kamandang