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All Journal Teknik Sipil dan Arsitektur IPTEK Journal of Proceedings Series Jurnal Konstruksia Briliant: Jurnal Riset dan Konseptual Teras Jurnal RACIC : Rab Construction Research AGREGAT Jurnal Pensil : Pendidikan Teknik Sipil Jurnal Desain EPI International Journal of Engineering Border: Jurnal Arsitektur Jurnal Teslink : Teknik Sipil dan Lingkungan International Journal of Eco-Innovation in Science and Engineering (IJEISE) JITSi : Jurnal Ilmiah Teknik Sipil Jurnal Penelitian Rumpun Ilmu Teknik Indonesian Journal of Multidisciplinary on Social and Technology Jurnal Sains dan Teknologi Media Konstruksi : Jurnal Ilmiah Teknik Sipil Jurnal Ilmiah Teknik Sipil Open Access DRIVERset Jurnal Teknik Sipil
Yerry Kahaditu Firmansyah
Department Of Civil Engineering, Faculty Of Engineering And Science, Universitas Pembangunan Nasional “Veteran” Jawa Timur.
Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation Other

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Journal : agregat

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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 Deformasi Lateral dan Getaran Tanah Akibat Pemancangan Tiang pada Pipa Minyak dan Gas Arraya Fredericko Romanza; Yerry Kahaditu Firmansyah; Dian Purnamawati Solin
AGREGAT Vol 11 No 1 (2026)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v11i1.31313

Abstract

The reclamation project of Triangle Island within the Java Integrated Industrial Port Estate (JIIPE) necessitates the installation of driven deep foundations in soft clay deposits adjacent to existing oil and gas pipelines. The pile driving process induces lateral soil deformation and ground vibration, posing a severe threat to pipeline integrity. This study evaluates the geotechnical impacts of pile driving and proposes effective mitigation measures. The structural viability of the foundation was initially validated using the Nakazawa method with corrected parameters for bearing capacity, alongside immediate settlement analysis using the Bowles equivalent raft approach for a 37-meter deep, 600 mm diameter steel pipe pile group. Subsequently, two-dimensional numerical modeling using finite element methods was conducted to simulate lateral soil displacement and ground vibration generated by a Junttan HHK 7A hydraulic impact hammer. Several mitigation scenarios, primarily focusing on pre-boring configurations, were analyzed. The unmitigated numerical results demonstrate that stress and lateral displacement around the pipeline approach or exceed allowable design limits. However, the implementation of optimized pre-boring significantly attenuates soil heave and vibration response, keeping pipeline deformations within safe operational thresholds. These findings provide a robust
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.
Co-Authors Abidin, Farhan Zainul Achmad Firman Maulana Al Firdaus Nawawi Alfin Reza Saputra Alfin Arifah Ismi Ambiya Arraya Fredericko Romanza Aryaseta, Bagas Avenzoar, Azkia Damayanti, Apta Kania Dana, Dinan Dian Purnamawati Solin Dominikus Aditya Fitriyanto Dwi Septy Wahyuningdiah Evandra Sebastian Farah Salsabila Rahma Himatul Farichah Himatul Farichah Ifthar Ramadhana Wahyudi Irmawan, Mudji Jatmiko, Muhammad Fauzi Kohar Yudoprasetyo Kresnawati, Megahnanda Alidyan Kusuma Indrasurya Kusuma, Ade Laily Endah Fatmawati M. Yusril Inza Mahendra Marco Dian Qinanta Miguel Felix Wijaya Miguel Felix Wijaya Minarni Nur Trilita Muhammad Ainun Nashrul Majid Muhammad Salman Mukhtar Nia Dwi Puspitasari Prasetyo, Querida Addisty Prayudi Prayudi Raden Kokoh Haryo Putro Ramadhan, Arya Galih Rania Nurlita Sari Refani, Afif Navir Siti Fauziah Sofi Suhaimah Yufika, Alivia Wulan