Studi Perkuatan Timbunan pada Tanah Lunak dengan Perkuatan Rigid Inclusion Studi Kasus: Jalan Tol Padang – Sicincin STA 5+825 – 5+925

Nafik, Muhron (2026) Studi Perkuatan Timbunan pada Tanah Lunak dengan Perkuatan Rigid Inclusion Studi Kasus: Jalan Tol Padang – Sicincin STA 5+825 – 5+925. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan jalan tol di atas tanah lunak memerlukan metode perbaikan tanah yang mampu mengurangi penurunan dan meningkatkan stabilitas timbunan. Penelitian ini bertujuan menganalisis pengaruh variasi diameter, spasi, dankedalaman Rigid Inclusion (RI) terhadap penurunan dan stabilitas timbunan, serta membandingkan efektivitasnya dengan metode Prefabricated Vertical Drain (PVD) Surcharge. Analisis dilakukan menggunakan Plaxis 2D pada studi kasus Jalan Tol Padang–Sicincin STA 5+825–5+925.Hasil analisis menunjukkan bahwa konfigurasi Rigid Inclusion eksisting dengan diameter 0,42 m, spasi 1,6 m, dan kedalaman 13 m menghasilkan penurunan 4,9 cm dalam 10 tahun, dengan faktor keamanan 1,612 pada kondisi statik dan 1,151 pada kondisi gempa, sehingga memenuhi kriteria desain. Variasi parameter menunjukkan bahwa peningkatan diameter dan kedalaman serta pengurangan spasi mampu meningkatkan kinerja timbunan, dengan kedalaman sebagai parameter yang paling berpengaruh. Dibandingkan dengan PVD Surcharge, metode Rigid Inclusion memberikan faktor keamanan yang lebih tinggi, sehingga lebih efektif dalam meningkatkan stabilitas timbunan pada kondisi lokasi penelitian.
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Highway construction on soft soil requires ground improvement methods capable of reducing settlement and improving embankment stability. This study aims to analyze the effects of Rigid Inclusion (RI) diameter, spacing, and depth on embankment settlement and stability, as well as to compare its effectiveness with the Prefabricated Vertical Drain (PVD) Surcharge method. The analysis was carried out using Plaxis 2D based on a case study of the Padang–Sicincin Toll Road, STA 5+825–5+925.The results indicate that the existing Rigid Inclusion configuration, with a diameter of 0.42 m, spacing of 1.6 m, and depth of 13 m, produced a 10-year settlement of 4.9 cm, with safety factors of 1.612 under static conditions and 1.151under seismic conditions, meeting the design requirements. The parametric studyshows that increasing the diameter and depth, as well as reducing the spacing, improves embankment performance, with depth being the most influential parameter. Compared with the PVD Surcharge method, Rigid Inclusion provides higher safety factors and is therefore more effective in improving embankment stability under the site conditions considered in this study.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Rigid Inclusion, Stabilitas Timbunan, Penurunan Tanah, Plaxis 2D, Prefabricated Vertical Drain, Rigid Inclusion, Embankment Stability, Ground Settlement, Plaxis 2D, Prefabricated Vertical Drain.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization T Technology > TE Highway engineering. Roads and pavements > TE175 Road and highway design
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Muhron Nafik
Date Deposited:	15 Jul 2026 08:23
Last Modified:	15 Jul 2026 08:23
URI:	http://repository.its.ac.id/id/eprint/135012

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