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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Manajemen Teknologi dan Teknik Sipil (JURMATEKS) Interdisciplinary Social Studies
Wahyudi, Herman
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Humanities Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Transportation Other

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Studi Mekanisme Kelongsoran dan Alternatif Penanganan Tanah Lunak Pada Ruas Jalan Tol Indrapura – Kisaran (STA 112+850 – STA 112+900) Haririi, Adnan; Wahyudi, Herman; Lastiasih, Yudhi
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 8 No. 1 (2025): JUNE
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v8i1.6652

Abstract

Embankment stability is a critical aspect of transportation infrastructure projects, especially in constructing on soft soil. Soft soil has low bearing capacity, high compressibility and low permeability. These characteristics increase the risk of structural failure, such as landslides and excessive settlement necessitating appropriate reinforcement methods. Beyond safety consedirations, soil strengthening must also factor in cost-effectiveness and construction time  to ensure an efficient and economical approach. This study aims to evaluate the effectiveness of Prefabricated Vertical Drain (PVD), geotextile, spun pile, as well as a combination of PVD and geotextile reinforcement methods. Field investigations and laboratory test provided soil and geometric data. This data is used as input in modeling using a finite element approach with Plaxis 2D software. The analysis results include safety factor (SF) values, ​​which are then calculated for strengthening costs and implementation time. A multi-criteria analysis is employed to determine the most optimal reinforcement method based on SF, cost, and implementation duration. The results indicate that the combination of PVD and geotextile provides the highest value, with a safety factor of 1.73, construction costs of IDR 1.57 billion, and implementation duration of 90 days. This strengthening is able to balance the three aspects considered. The combination of PVD which accelerates consolidation and geotextiles which strengthen the embankment structure has been proven to increase stability without significantly increasing costs. These findings contribute to the optimization of soft soil strengthening strategies in selecting efficient and economical strengthening methods.
Alternatif Metode dan Perbaikan Tanah Lunak pada Jalan Tol Akses Patimban Sta 28+305 – Sta 28+450 Aziz, Irfan Ulumuddin; Wahyudi, Herman; Sari, Putu Tantri Kumala
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i7.60743

Abstract

Penelitian ini membahas alternatif metode dan perbaikan tanah lunak pada proyek Jalan Tol Akses Patimban STA 28+305 – STA 28+450 yang merupakan bagian dari Proyek Strategis Nasional di Indonesia. Berdasarkan hasil investigasi tanah, diketahui bahwa lapisan tanah lempung lunak dengan konsistensi medium mendominasi lokasi penelitian dan berpotensi menyebabkan pemampatan dan ketidakstabilan timbunan. Penelitian ini bertujuan mengevaluasi desain eksisting terhadap waktu pencapaian derajat konsolidasi 90% (U90) dan stabilitas timbunan, serta merancang metode perbaikan tanah yang efektif dan efisien. Metode yang digunakan meliputi evaluasi data sekunder, simulasi konsolidasi, dan analisis stabilitas menggunakan perangkat lunak Geo5. Hasil penelitian menunjukkan bahwa desain eksisting tidak memenuhi target waktu konsolidasi U90 dalam satu tahun. Alternatif perbaikan menggunakan kombinasi preloading dan Prefabricated Vertical Drain (PVD) dengan pola segiempat jarak 2 meter terbukti dapat mempercepat proses pemampatan hingga U90 tercapai dalam 21 minggu dan menyelesaikan pekerjaan timbunan dalam 38 minggu, lebih cepat 58 minggu dari rencana awal. Stabilitas timbunan juga memenuhi standar keamanan sesuai SNI tanpa perlu perkuatan tambahan. Temuan ini memberikan kontribusi terhadap optimalisasi perencanaan proyek infrastruktur di atas tanah lunak.
Determination of Soft Soil Permeability Parameters Using Plaxis 2D Based on Settlement Plate Monitoring Data Pratama, Bagas Hendi; Lastiasih, Yudhi; Wahyudi, Herman
Interdisciplinary Social Studies Vol. 5 No. 2 (2026): Interdisciplinary Social Studies
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v5i2.1051

Abstract

Road infrastructure development on soft soils often faces geotechnical challenges in the form of large and time-consuming settlement. Discrepancies often occur between analytical settlement predictions and actual conditions in the field. This study aims to determine valid soil permeability parameters (k) through the back calculation method using Plaxis 2D numerical modeling calibrated with settlement plate monitoring data. The research employs a quantitative analytical approach combining field monitoring, observational methods, and finite element numerical simulation to establish representative soil parameters for consolidation analysis. The research methodology includes interpretation of soil investigation data (Borlog and CPTu), prediction of final settlement using the Asaoka observation method, and finite element simulations using the Mohr-Coulomb and Hardening Soil models. Based on the analysis of the Asaoka method on monitoring data during the construction phase, the predicted final settlement (Sult) is 148.93 cm with a time to achieve a degree of consolidation of 90% (t90) of 1.27 years. The results of the Plaxis 2D simulation show an exponential relationship between the permeability value and the consolidation time. Through the back calculation analysis, the most representative soil permeability value (k) for the field conditions is 1.26 × 10?? m/day. This value validates the agreement between the numerical model and the actual consolidation behavior in the field, providing practical guidance for geotechnical engineers in soft soil design and construction monitoring.
Co-Authors Aziz, Irfan Ulumuddin Haririi, Adnan Lastiasih, Yudhi Pratama, Bagas Hendi Sari, Putu Tantri Kumala