Article Per Year (5 Year)
p-Index From 2021 - 2026
4.081
P-Index
This Author published in this journals
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

Published : 28 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 28 Documents
Search

 1   2   3 
Pengaruh Penambahan Fly Ash Terhadap Nilai Indeks Plastisitas Tanah Lanau Berpasir di Jembatan Sine, Tulungagung Marco Dian Qinanta; Yerry Kahaditu Firmansyah; Himatul Farichah
Konstruksia Vol 17 No 2 (2026): Jurnal Konstruksia Vol 17 No. 2 Tahun 2026
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.17.2.11-18

Abstract

Pada pembangunan proyek jln Lot 6a, jenis material tanah yang dijadikan timbunan mengacu pada spesifikasi pekerjaan tanah 2016. Area jembatan sine merupakan salah satu lokasi yang kondisi tanahnya tidak memenuhi spesifikasi teknik yang ada, karena termasuk dalam klasifikasi jenis tanah A-7-5 menurut AASHTO dan MH (Lanau elastis dengan pasir) menurut U.S.C.S., maka dari itu diperlukan stabilitas terhadap tanah tersebut. Adapun stabilisasi yang digunakan yaitu dengan menambah fly ash kelas F kedalam tanah. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan fly ash terhadap nilai indeks plastisitas tanah lanau berpasir pada proyek pembangunan khususnya di area jembatan sine. Penambahan fly ash dilakukan dengan 3 variasi yaitu 15% (v1), 20% (v2), dan 25% (v3) dengan parameter pengujian diantaranya berat jenis (GS), batas cair (LL), batas plastis (PL), batas susut (SL), dan indeks plastisitas (PI). Hasil pengujian menunjukkan penurunan terbesar pada penambahan fly ash 25%(v3), dengan nilai pernurunan untuk berat jenis (GS) sebesar 19,33%, batas cair (LL) 13,20%, batas plastis (PL) 5,25%, batas susut (SL) 11,08%, serta indeks plastisitas (PI) 8,07%. Secara keseluruhan, penggunaan fly ash terbukti efektif dalam memperbaiki sifat fisis tanah lanau berpasir, sehingga berpotensi digunakan sebagai bahan stabilisasi alternatif untuk perbaikan tanah dasar (subgrade) pada proyek infrastruktur jalan. Kata kunci: fly ash, tanah lanau berpasir, sifat fisis tanah, stabilisasi tanah, pozzolan
Slope Stability Analysis at JLS Lot 3 Blitar with Soil Nailing Reinforcement under Seismic Loading Using Finite Element Method Siti Fauziah; Yerry Kahaditu Firmansyah; Bagas Aryaseta; Miguel Felix Wijaya
EPI International Journal of Engineering Vol 8 No 2 (2025): Volume 8 Number 2, August 2025
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Slope stability in hilly areas with high seismic activity requires thorough geotechnical assessment to prevent potential failures that could endanger infrastructure and human safety. This study evaluates the effectiveness of soil nailing combined with shotcrete in reinforcing slopes under both static and seismic conditions at JLS Lot 3, Blitar. A two-dimensional finite element method (FEM) with plane strain modeling was applied to simulate slope behavior, including staged construction procedures and soil-structure interaction. Soil parameters were derived from bore log data, corrected for groundwater table and overburden effects, and used to define unit weight, cohesion, internal friction angle, modulus of elasticity, and Poisson’s ratio. The slope geometry was carefully modeled with attention to benching, slope angles, and shotcrete coverage. Surface loads representing construction, traffic, and pavement conditions were applied to the model to reflect realistic field scenarios. Results show that, without seismic loading, the reinforced slope reached a safety factor of 1.575, exceeding the minimum criterion of 1.50. When seismic loading was applied, the safety factor decreased to 1.106 but remained above the required 1.10 threshold, demonstrating that soil nailing with shotcrete effectively improves slope stability and controls deformation. The study emphasizes the importance of reinforcement design parameters, such as nail length, spacing, inclination angle, and shotcrete thickness, providing insights for optimizing slope reinforcement strategies under seismic conditions. The findings contribute to safer and more resilient slope design practices in earthquake-prone areas.
Analisis Neraca Massa Penyisihan Ion Timbal (Pb²⁺) oleh Bioadsorben Daun Rami pada Sistem Adsorpsi Batch Rania Nurlita Sari; Raden Kokoh Haryo Putro; Yerry Kahaditu Firmansyah
Jurnal Sains dan Teknologi Vol. 5 No. 1 (2026): Juni : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v5i1.1116

Abstract

Lead (Pb²⁺) contamination in wastewater is a major environmental concern due to its toxicity, persistence, and ability to accumulate in living organisms. Adsorption using biomass-based materials has been developed as an alternative treatment method because it is efficient, economical, and environmentally friendly. This study aimed to analyze the effect of bioadsorbent dosage and contact time on Pb²⁺ removal efficiency and evaluate Pb²⁺ mass distribution using mass balance analysis in a batch adsorption system. Ramie leaf (Boehmeria nivea) was utilized as a bioadsorbent due to its lignocellulosic content, which provides active sites for metal ion adsorption. The research was conducted experimentally through bioadsorbent preparation, chemical activation, and batch adsorption using artificial Pb²⁺ solutions with variations in bioadsorbent dosage and contact time. Pb²⁺ concentrations before and after adsorption were analyzed using Atomic Absorption Spectroscopy (AAS). The obtained data were used to determine removal efficiency and Pb²⁺ distribution between the liquid phase and bioadsorbent. The results showed that ramie leaf bioadsorbent effectively reduced Pb²⁺ concentration, with the optimum condition obtained at 4 g/L bioadsorbent dosage and 90 minutes contact time, achieving 98.46% removal efficiency. Mass balance analysis indicated that Pb²⁺ ions were successfully transferred from the solution phase onto the bioadsorbent surface. These findings demonstrate that ramie leaf bioadsorbent has potential as a sustainable alternative material for heavy metal removal in wastewater treatment.
ANALISIS MODIFIKASI TIANG PANCANG TERHADAP GAYA ANGKAT AKIBAT MUKA AIR TANAH M. Yusril Inza Mahendra; Yerry Kahaditu Firmansyah; Dian Purnamawati Solin
JITSi : Jurnal Ilmiah Teknik Sipil Vol. 6 No. 2 (2026): Juni 2026
Publisher : Universitas Perjuangan Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36423/jitsi.v6i2.2783

Abstract

Abstract— Fluctuations in the groundwater table not only generate hydrostatic uplift forces on the foundation slab but also alter the consolidation characteristics of the underlying clay (A. Rifai and T. S. Kurniadi, 2023). This study on a hotel construction project aims to analyze the performance of pile foundations subjected to uplift forces due to a rise in the groundwater level of up to 2.5 meters. The analysis examines axial bearing capacity using the method by Nakazawa, K. (1983), as well as deformations specifically axial settlement and lateral deflection using the finite element method. The analysis yielded an ultimate bearing capacity of 406.9 kN. Regarding deformation, initial uplift of 42 millimeters occurred in some foundation areas, followed by an additional 2.5-meter uplift. This issue confirms that uplift forces caused by groundwater exert a significant impact that can weaken foundation capacity and increase the risk of deformation. This condition is considered hazardous to structural stability if not addressed promptly. As a mitigation measure, this study recommends optimization efforts through changes in the dimensions of structural components. The proposed solution is to increase the pile diameter from 0.6 meters to 1 meter, to ensure that the overall foundation performance remains within safe limits and meets technical requirements. Keywords — Bearing Capacity, Foundation, Uplift Force Abstrak— Fluktuasi muka air tanah tidak hanya memicu gaya angkat hidrostatik pada pelat fondasi, tetapi juga mengubah karakteristik konsolidasi tanah lempung di bawahnya (A. Rifai and T. S. Kurniadi, 2023). Penelitian mengenai proyek pembngunan hotel ini bertujuan untuk menganalisis kinerja fondasi tiang pancang yang menglami kenaikan akibat muka air tanah dengan ketinggian maksimal sepanjang 2.5 meter. Analisis ini dilakukan terhadap kapasitas daya dukung aksial dengan menggunakan metode Nakazawa, K. (1983), deformasi berupa penurunan aksial dan defleksi lateral menggunakan finite element method. Pada analisis, diperoleh kapasitas daya dukung ultimit sebesar 406.9 kN. Dari sisi deformasi, pada beberapa area fondasi mengalami kenaikan awal sepanjang 42 meter, lalu mengalami kenaikan setinggi 2.5 meter. Dari permasalahan tersebut mengonfirmasi bahwa gaya angkat akibat air tanah memberikan dampak signifikan yang dapat memperlemah kapasitas serta meningkatkan risiko deformasi pada fondasi. Kondisi ini dinilai membahayakan stabilitas struktur jika tidak segera ditangani. Sebagai langkah mitigasi, penelitian ini merekomendasikan upaya optimasi melalui perubahan dimensi komponen struktur. Solusi yang diusulkan adalah memperbesar diameter tiang pancang dari ukuran semula 0,6 meter menjadi 1 meter, guna memastikan seluruh kinerja fondasi tetap berada dalam batas aman dan memenuhi persyaratan teknis. Kata kunci — Daya Dukung, Fondasi. Gaya Angkat
ANALISIS PENURUNAN PONDASI TIANG BOR PADA JEMBATAN DENGAN METODE ANALITIS DAN PEMODELAN NUMERIK Yufika, Alivia Wulan; Dana, Dinan; Firmansyah, Yerry Kahaditu
Jurnal Teknik Sipil dan Arsitektur Vol 31 No 2 (2026): Jurnal Teknik Sipil dan Arsitektur
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v31i2.5945

Abstract

Borepile are a critical component of bridge structures because they ensure the safe transfer of loads to deeper soil layers. In the Dhoho Kediri-Tulungagung Airport Toll Road Project, point P6 is one of the locations requiring in-depth evaluation of the bearing capacity and settlement of the foundation due to variations in local soil conditions. This study aims to analyze the performance of the borepile foundation at this point through analytical and empirical approaches, as well as numerical modeling using PLAXIS 2D to more comprehensively examine the soil-structure response. The analysis results indicate that the foundation was capable of meeting the required bearing capacity and producing settlement within tolerable limits. Numerical modeling also reveals deformation patterns and stress distributions consistent with the soil characteristics and foundation geometry. This combination of calculation and simulation methods provides a more comprehensive vision of the behavior of the borepile foundation at point P6. Overall, this study confirms that the borepile foundation at point P6 is suitable for use and capable of providing stable performance in supporting the bridge structure. These study can serve as a reference in the planning and evaluation of foundations in other segments with similar geotechnical conditions.
ANALISIS DAYA DUKUNG DAN PENURUNAN PONDASI BORED PILE METODE LUCIANO DECOURT & PROGRAM PLAXIS 2D Jatmiko, Muhammad Fauzi; Abidin, Farhan Zainul; Firmansyah, Yerry Kahaditu
Jurnal Teknik Sipil dan Arsitektur Vol 31 No 2 (2026): Jurnal Teknik Sipil dan Arsitektur
Publisher : Fakultas Teknik Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jtsa.v31i2.5947

Abstract

The demand for reliable transportation infrastructure requires accurate evaluation of foundation performance, particularly for deep foundations such as bored piles used in elevated road structures. This study aims to analyze the bearing capacity and settlement behavior of bored pile foundations at point P4 of the Kediri–Tulungagung Toll Road Project, specifically on the Access Road to Dhoho Airport. Subsurface investigations indicate a soil profile dominated by clay at shallow depths and loose to dense sand at deeper layers, necessitating detailed analysis of strength and deformation characteristics. The analytical approaches employed include the empirical Luciano Decourt method and numerical modeling using PLAXIS 2D based on the finite element method. The bearing capacity analysis of the P4 bored pile using the Luciano Decourt method resulted in an allowable capacity (Qijin) of 354.26 tons and an ultimate capacity (Qult) of 885.65 tons. Meanwhile, the settlement analysis performed using PLAXIS 2D yielded a value of 45.98 mm, which closely matches the empirical settlement of 41.7 mm. The difference of approximately 10% demonstrates good agreement between the two methods. The results confirm that the bored pile foundation at point P4 is capable of supporting the design load of 764.8 tons, with the measured settlement remaining within acceptable limits. The integration of empirical and numerical methods enhances the reliability of the evaluation and provides a more comprehensive understanding of soil–structure interaction. This combined approach has been proven effective and can serve as a reference for foundation design in similar infrastructure projects. Keyword : Bored Pile, Bearing Capacity, Settlement Analysis, PLAXIS 2D
Kajian Dewatering Sebagai Metode Darurat Pengairan Saluran Sekunder di Gumbasa, Sulawesi Tengah Yerry Kahaditu Firmansyah; Minarni Nur Trilita
Teras Jurnal : Jurnal Teknik Sipil Vol. 13 No. 2 (2023): Volume 13 Nomor 2, September 2023
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v13i2.947

Abstract

Abstrak Sebagai negara agraris, masyarakat Indonesia banyak menggantungkan hidupnya pada sektor pertanian. Dalam pertanian, irigasi sangatlah penting untuk memastikan hasil tani sekaligus mengembangkan sektor pertanian. Untuk itu, Daerah Irigasi Gumbasa, Palu, Sulawesi Tengah dilakukan rehabilitasi di saluran primer. Namun saat proses rehabilitasi berjalan, saluran sekunder ke bawahnya tetap memerlukan aliran air irigasi agar tidak mengganggu pertanian yang dialirinya. Oleh karenai itu direncanakan untuk digunakan metode dewatering sebagai metode pengairan darurat. Metode dewatering jamak dilakukan pada pekerjaan konstruksi. Namun, karena metode tersebut belum pernah digunakan pada keperluan irigasi, maka perlu untuk dikaji secara mendalam. Dalam kajian ini akan dihitung jumlah sumuran yang diperlukan dan seberapa lama untuk memenuhi debit yang dibutuhkan dalam sehari. Hasil dari kajian tersebut adalah metode dewatering tidak sesuai untuk kegunaan darurat pengairan saluran irigasi karena jumlah sumuran yang diperlukan mencapai ribuan, sehingga perlu dilakukan kajian metode lain untuk memenuhi debit saluran sekunder tersebut. Kata kunci: Dewatering, Irigasi, Saluran Sekunder, Rehabilitasi, Pertanian   Abstract As citizens in an agricultural country, most Indonesians depend on the agricultural sector for their livelihood. Irrigation is crucial to ensure farming yields while developing the agricultural sector. For this reason, the Gumbasa Irrigation Area, Palu, Central Sulawesi, is rehabilitating the primary channel. However, during the rehabilitation process, the secondary channels still need irrigation water flow so as not to interfere with the agriculture it flows through. Therefore, it was planned to use the dewatering method as an emergency irrigation method. The dewatering method is commonly used in construction works. However, since the method has never been used for irrigation purposes, it needs to be studied. The study will calculate the number of wells required and how long it takes to fulfil the required discharge in a day. The result of the study is that the dewatering method is not suitable for irrigation purposes because the number of pits required is in the thousands, so it is necessary to study other methods to fulfil the secondary channel discharge. Keywords: Dewatering, Irrigation, Secondary Channel, Rehabilitation, Agriculture
Structural Capacity Assessment of Cremona Steel Bracing and Connections for Coastal Embankment Strengthening: A Case Study of Muara Baru, Jakarta Kusuma Indrasurya; Kohar Yudoprasetyo; Yerry Kahaditu Firmansyah
Indonesian Journal of Multidisciplinary on Social and Technology Vol. 4 No. 3 (2026): Juli - Oktober
Publisher : PT Ilmu Data Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69693/ijmst.v4i3.13783

Abstract

Damage to the coastal protection embankment at Muara Baru required a strengthening system capable of controlling wall response while providing a structural load path that could be verified at both member and connection levels. This case study evaluates the capacity of a Cremona-type steel bracing system and its connections using data from an actual rehabilitation project. A global SAP2000 model was developed using structural loads transferred from PLAXIS 2D geotechnical analysis. Piles and tiebacks were represented by frame elements, the pilecap by shell elements, and soil-structure interaction by soil springs. Steel-member adequacy was assessed using a demand-to-capacity ratio limit of 1.0. Local connection checks were subsequently performed using finite-element analysis in IDEA StatiCa for two critical details: the WF 200×200-to-pilecap connection and the WF 200×200 Cremona bracing connection. The global model indicated that all steel members remained below the specified unity ratio. For the 1200-mm-diameter spun pile, the maximum axial utilization ratio was 0.211, whereas the maximum bending utilization ratio reached 0.933 based on the project capacity-check table. Both local steel connection details satisfied the reported acceptance criteria. The principal connection configuration comprised ASTM A572 Grade 50 plates, ASTM A325 bolts, ASTM A307 anchors, and 16-mm gusset and base plates. The results show that a staged assessment from global structural response to local connection verification provides a practical means of checking force-transfer continuity in pile-supported coastal embankment strengthening and highlights bending demand as the more critical response for the spun-pile wall.
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