Analisis Penurunan Serta Alternatif Penanganan pada Segmen Timbunan dan Slab On Pile (Studi Kasus: Jalan Tol Akses Patimban Paket 2 STA 25+600-25+700)

Tambunan, Andreanus Mooy (2026) Analisis Penurunan Serta Alternatif Penanganan pada Segmen Timbunan dan Slab On Pile (Studi Kasus: Jalan Tol Akses Patimban Paket 2 STA 25+600-25+700). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan Jalan Tol Akses Patimban merupakan salah satu Proyek Strategis Nasional yang berfungsi sebagai akses utama menuju Pelabuhan Patimban yang diharapkan menjadi salah satu pelabuhan terbesar di Indonesia. Lokasi pembangunan jalan tol berada dalam sebaran kondisi tanah lunak dan kondisi eksisting berupa areal persawahan yang memiliki kadar air tinggi. Oleh karena itu konstruksi pembangunan dilakukan dengan kombinasi timbunan dan Pile Slab. Lokasi penelitian berada di Paket 2 pada STA 25+600-25+700 dengan kondisi tanah lunak kedalaman rata-rata 11 m dengan rata-rata N-SPT < 10 blows/feet. Pada segmen timbunan dilakukan replacement dengan selected borrow material layer A dan B dengan total 1,5m. Untuk perkuatan tanah lunak dengan Pile Slab dengan diameter 60 cm sedalam rata-rata 21 m dengan jarak melintang antar pile 2,6 m dan jarak memanjang 5m. Berdasarkan hasil penyelidikan tanah, dengan metode soil replacement, pihak perencana proyek memprediksi konsolidasi primer yang ditargetkan selesai sampai dengan 12 bulan tersebut terindikasi tidak tercapai. Hal ini berpotensi terhadap keterlambatan penyelesaian pekerjaan dan terjadinya beda penurunan antara segmen timbunan dan Pile Slab saat konstruksi beroperasi. Berdasarkan hasil analisis menunjukkan bahwa beda penurunan antara timbunan dengan tiang Pile Slab antara Metode Terzaghi 1D (81,94 cm) dengan metode numerik Plaxis 2D (83 cm) menghasilkan deviasi yang tidak jauh sebesar 1,30%. Evaluasi alternatif penanganan menunjukan dengan penggunaan PVD menghasilkan laju penurunan 2cm/tahun (0,436 cm) dan 10cm/10 tahun (4,333 cm) namun masih melampaui batas izin perubahan kemiringan 0,3% (1,056%). Sebaliknya alternatif relieving platform menghasilkan laju penurunan 2cm/tahun (0,118 cm) dan 10cm/10 tahun (1,178 cm) serta perubahan kemiringan 0,071% sehingga memenuhi seluruh kriteria kinerja serta dinilai paling optimal dalam mengendalikan beda penurunan yang terjadi antara segmen timbunan dan Pile Slab.
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The Patimban Access Toll Road is one of Indonesia’s National Strategic Projects, serving as the main access route to Patimban Port, which is projected to become one of the largest ports in the country. The construction site is located inan area dominated by soft soil and irrigated rice fields, characterized by high water content. Consequently, the construction method adopted consists of a combination of embankment and Slab on Pile. The research is located on Package 2 at STA 25+600 - STA 25+700, where the average soft soil depth reaches approximately 11 meters and the average N-SPT value is less than 10 blows/feet. In the embankment segment, soil replacement was carried out using selected borrow material layers A dan B with a total thickness of 1,5 m. The soft soil reinforcement in the Slab on Pile segment employs 60 cm diameter piles with an average depth of 21 meters, spaced at 2,6 meters transversely and 5 meters longitudinally. Based on the results of the soil investigation, it was predicted that targeted completion of primary consolidation within 12 months using the soil replacement method would not be achieved. This condition may lead to construction delays and induce differential settlement between the embankment and Slab on Pile sections during the operational stage. Based on the analysis results, the differential settlement between the embankment and the Slab on Pile obtained from the Terzaghi 1D method (81,94 cm) and the numerical analysis using Plaxis 2D (83,0 cm) shows a relatively small deviation of 1,30%. The evaluation of ground improvement alternatives indicates that the use of prefabricated vertical drains (PVD) satisfies the settlement rate criteria of 2 cm/year (0,436 cm) and 10 cm/10 years (4,333 cm); however, it still exceeds the allowable slope change limit of 0,3% (1,056%). In contrast, the relieving platform alternative results in a settlement rate of 2 cm/year (0,118 cm) and 10 cm/10 years (1,178 cm), with a slope change of 0,071%, thereby fulfilling all performance criteria and being assessed as the most optimal solution for controlling differential settlement between the embankment and the Slab on Pile.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Tanah Lunak, Penurunan, Timbunan, Pile Slab Embankment, Settlement, Soft soil, Slab on Pile
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:	Andreanus Mooy Tambunan
Date Deposited:	26 Jan 2026 05:56
Last Modified:	26 Jan 2026 05:56
URI:	http://repository.its.ac.id/id/eprint/130338

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