Analisis Penurunan Diferensial Dan Stabilitas Pada Zona Transisi Segmen Timbunan Dan Slab On Pile (Studi Kasus: Jalan Tol Serang - Panimbang Seksi III)

Ihsani, Hanifan (2026) Analisis Penurunan Diferensial Dan Stabilitas Pada Zona Transisi Segmen Timbunan Dan Slab On Pile (Studi Kasus: Jalan Tol Serang - Panimbang Seksi III). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan infrastruktur jalan tol di atas tanah lunak seringkali dihadapkan pada permasalahan geoteknik yang kompleks, terutama pada zona transisi oprit jembatan yang rentan terhadap penurunan diferensial (differential settlement). Studi ini difokuskan pada analisis kinerja zona transisi di Proyek Jalan Tol Serang- Panimbang Seksi III, di mana kondisi tanah dasar didominasi oleh lapisan lempung lunak yang tebal (>18 m). Penelitian ini bertujuan untuk mengevaluasi kinerja metode penanganan eksisting (Free Draining Granular Material/FDGM) serta membandingkan efektivitas tiga skenario mitigasi alternatif yaitu Prefabricated Vertical Drain (PVD) dengan Preloading, struktur Relieving Platform dan sistem Kombinasi (Hybrid System). Metodologi penelitian dilakukan melalui pendekatan ganda yaitu perhitungan analitik serta pemodelan numerik Metode Elemen Hingga (Plaxis 2D) dan Keseimbangan Batas (Geo5) untuk simulasi perilaku deformasi dan stabilitas. Evaluasi penentuan penanganan optimal dilakukan menggunakan analisis keputusan multi-kriteria dengan parameter penentu meliputi batas izin penurunan, distorsi angular, laju penurunan (rate of settlement), Faktor Keamanan (SF), biaya, dan waktu pelaksanaan. Hasil analisis menunjukkan bahwa metode penanganan eksisting tidak memadai untuk kondisi tanah lunak yang sangat dalam dari kriteria penurunan diferensial dan stabilitas. Alternatif Kombinasi (PVD + Relieving Platform) tercatat sebagai solusi teknis paling superior yang mampu menghasilkan transisi geometri paling mulus dengan distorsi angular 1:476 (0,21%). Namun, berdasarkan evaluasi multi-kriteria yang mempertimbangkan efisiensi investasi, metode PVD + Preloading ditetapkan sebagai solusi paling optimal dengan skor tertinggi (4,10). Metode ini terbukti andal memenuhi kriteria keamanan (SF = 1,68 > 1,5), mengontrol laju penurunan sisa di bawah 2 cm/tahun, memperbaiki distorsi angular menjadi 1:215, serta menawarkan efisiensi biaya konstruksi hingga 30-50% dibandingkan alternatif lainnya.
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The construction of toll road infrastructure over soft soil often faces complex geotechnical challenges, particularly in the bridge approach transition zone which is susceptible to differential settlement. This study focuses on the performance analysis of the transition zone in the Serang-Panimbang Toll Road Project Section III, where the subgrade is dominated by thick soft clay layers (>18 m). This research aims to evaluate the performance of the existing treatment method (Free Draining Granular Material/FDGM) and compare the effectiveness of three alternative mitigation scenarios: Prefabricated Vertical Drain (PVD) with Preloading, Relieving Platform structure, and a Combination system (Hybrid System). The research methodology was conducted using a dual approach involving analytical calculations and numerical modeling utilizing the Finite Element Method (Plaxis 2D) and Limit Equilibrium Method (Geo5) to simulate deformation and stability behavior. The evaluation to determine the optimal treatment was performed using Multi-Criteria Decision Analysis (MCDA), with determining parameters including allowable settlement limits, angular distortion, rate of settlement, Safety Factor (SF), cost, and implementation time. The analysis results indicate that the existing treatment method is inadequate for deep soft soil conditions regarding differential settlement and stability criteria. The Combination Alternative (PVD + Relieving Platform) was recorded as the most superior technical solution, capable of producing the smoothest geometric transition with an angular distortion of 1:476 (0.21%). However, based on the multi-criteria evaluation considering investment efficiency, the PVD + Preloading method was determined as the most optimal solution with the highest score (4.10). This method proved reliable in meeting safety criteria (SF = 1.68 > 1.5), controlling the residual settlement rate below 2 cm/year, improving angular distortion to 1:215, and offering construction cost efficiency of up to 30-50% compared to other alternatives.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Tanah Lunak, Penurunan Diferensial, Stabilitas Timbunan, Zona Transisi, PVD, Relieving Platform. Soft Soil, Differential Settlement, Embankment Stability, Transition Zone, PVD, Relieving Platform
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TE Highway engineering. Roads and pavements > TE7 TG300 Bridges--Design and construction.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis
Depositing User:	Hanifan Ihsani
Date Deposited:	23 Jan 2026 09:37
Last Modified:	23 Jan 2026 09:37
URI:	http://repository.its.ac.id/id/eprint/130274

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