Pangestu, I Made Surya Wisnu (2026) Analisis Penyebab Terjadinya Kerusakan Timbunan Jalan dan Alternatif Perencanaan Jalan di Atas Timbunan dengan Perkuatan Encapsulated Stone Column (ESC) dan Deep Cement-Soil Mixing (DCSM) pada Ruas Jalan Aruk – Sp. Take STA 99+000 S.D. STA 99+550, Kalimantan Barat. Masters thesis, Institut Teknologi Sepuluh November.
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Abstract
Pembangunan jalan di wilayah perbatasan Kalimantan Barat sering menghadapi kendala geoteknik berupa lapisan tanah lunak yang sangat tebal. Penelitian ini berfokus pada Ruas Jalan Aruk – Sp. Take STA 99+000 s.d. STA 99+550 yang mengalami kerusakan berat. Balai Pelaksanaan Jalan Nasional (BPJN) Kalimantan Barat sebelumnya merencanakan konstruksi pile slab sepanjang 550 m, namun solusi ini memerlukan biaya konstruksi yang sangat tinggi. Penelitian ini bertujuan untuk menganalisis penyebab kerusakan timbunan eksisting serta mencari alternatif perkuatan tanah lunak yang paling efektif dari segi teknis, ekonomis dan waktu konstruksi paling singkat. Metode yang dikaji sebagai alternatif adalah Encapsulated Stone Column (ESC) dan Deep Cement-Soil Mixing (DCSM) dengan berbagai variasi diameter serta jarak antar kolom. Analisis stabilitas dilakukan menggunakan perangkat lunak GEO5. Hasil analisis menunjukkan bahwa kegagalan timbunan eksisting disebabkan oleh kapasitas aliran box culvert yang tidak memadai (menyebabkan overtopping) serta daya dukung tanah dasar yang rendah. Secara teknis, konfigurasi paling optimal untuk ESC adalah diameter 0,7 m dengan jarak 1,50 m, sedangkan untuk DCSM adalah diameter 0,7 m dengan jarak 1,50 m. Berdasarkan aspek ekonomi dan waktu, metode ESC terbukti lebih efisien dibandingkan DCSM dan pile slab. Estimasi biaya konstruksi ESC adalah Rp 57.429.932.323,00 (lebih hemat 33,75% dibandingkan pile slab) dengan durasi pelaksanaan 371 hari. Namun, perbandingan lebih lanjut menunjukkan bahwa penggunaan 100% Timbunan Biasa dengan Prefabricated Vertical Drain (PVD) merupakan solusi yang paling efisien untuk lokasi studi karena memberikan stabilitas yang memenuhi syarat dengan biaya paling rendah dan waktu pelaksanaan tercepat.
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Road construction in the border areas of West Kalimantan frequently encounters geotechnical constraints due to very thick soft soil layers. This research focuses on the Aruk – Sp. Take road section, STA 99+000 to STA 99+550, which experienced severe damage characterized by settlement and sliding. The West Kalimantan National Road Construction Agency (BPJN) previously planned a 550-meter pile slab construction; however, this solution requires exceptionally high construction costs. The objective of this research is to analyse the causes of the existing embankment failure and to identify the most effective soil improvement alternatives based on technical performance, economic feasibility, and construction duration. The methods evaluated include Encapsulated Stone Column (ESC) and Deep Cement-Soil Mixing (DCSM) with various diameter and spacing configurations. Stability analysis was performed using GEO5 software. The results indicate that the existing embankment failure was caused by inadequate flow capacity of the box culvert (leading to overtopping) and low subgrade bearing capacity. Technically, the optimal configuration for ESC is a 0.7 m diameter with 1.50 m spacing, while for DCSM, it is a 0.7 m diameter with 1.50 m spacing. From economic and time perspectives, the ESC method proved to be more efficient than both DCSM and pile slabs. The estimated construction cost for ESC is IDR 57.429.932.323,00 (a 33.75% saving compared to pile slabs) with a 371-day construction period. However, further comparison reveals that utilizing 100% Common Embankment with Prefabricated Vertical Drain (PVD) is the most efficient solution for this site, as it provides required stability at the lowest cost and fastest construction time.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Tanah Lunak, Encapsulated Stone Column, Deep Cement-Soil Mixing, Stabilitas Timbunan Soft Soil, Encapsulated Stone Column, Deep Cement-Soil Mixing, Embankment Stability |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA174 Computer-aided design. T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA780.C29 Piling (Civil engineering) 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: | I Made Surya Wisnu Pangestu |
| Date Deposited: | 26 Jan 2026 06:59 |
| Last Modified: | 26 Jan 2026 06:59 |
| URI: | http://repository.its.ac.id/id/eprint/130366 |
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