Mukhtar, Muhammad Salman (2026) Analisis Perbaikan Tanah Lunak Pada Proyek Pembangunan Jalan Tol Probolinggo-Banyuwangi Paket 3 Dengan Berbagai Alternatif Metode Perbaikan Tanah. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The construction of the Probolinggo-Banyuwangi Toll Road Package 3 faces geotechnical constraints in the form of soft soil conditions with low bearing capacity and high compressibility, thus potentially causing land subsidence and disrupting the stability of the toll road embankment. This study aims to analyze the existing soil conditions (RTA) and evaluate the effect of various soil improvement methods on the settlement and stability of the embankment. The research method uses numerical analysis based on the finite element method through the PLAXIS 2D program with the Hardening Soil Model approach. The research data are in the form of secondary data including the results of the Standard Penetration Test (SPT), embankment soil parameters, and cross-section geometry. The analysis was carried out at STA. 42+450, STA. 42+675, and STA. 45+700 which represent variations in the thickness of the soft soil. Alternative improvement methods analyzed include replacement, a combination of cerucuk and bamboo mattresses, and a combination of Prefabricated Vertical Drain (PVD) and preloading. The analysis results show that the existing soil conditions do not meet the technical criteria because they have experienced a subsidence of more than 10 cm during the 10-year operational period and have a safety factor of less than 1.5 under service conditions and less than 1.1 under earthquake conditions. The replacement method is effectively applied to shallow compressible soil with a thickness of 3 m, the combination of cerucuk and bamboo mattresses is able to increase stability at a thickness of 5 m, while the combination of PVD and preloading is most effective for compressible soil with a thickness of 6-12 m because it is able to accelerate consolidation, reduce long-term settlement, and increase the safety factor to meet the design criteria. This study produces recommendations for soil improvement methods based on the thickness of the compressible soil to support the safety and long-term performance of the toll road.
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||||
| Divisions: | Faculty of Engineering > Departement of Civil Engineering | ||||||||||||
| Depositing User: | Muhammad Salman Mukhtar | ||||||||||||
| Date Deposited: | 29 May 2026 03:24 | ||||||||||||
| Last Modified: | 29 May 2026 03:24 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/52975 |
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