Kajian Alternatif Metode Perbaikan Tanah pada Jalan Tol Trans Sumatera: Menggunakan Program Bantu Berbasis Metode Elemen Hingga

Hardono, Dony Afi (2026) Kajian Alternatif Metode Perbaikan Tanah pada Jalan Tol Trans Sumatera: Menggunakan Program Bantu Berbasis Metode Elemen Hingga. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan Jalan Tol Trans Sumatera Ruas Betung (Sp. Sekayu)–Tempino–Jambi Seksi 4 menghadapi permasalahan geoteknik berupa terjadinya keruntuhan timbunan pada STA 156+500–156+575. Kondisi tersebut menunjukkan bahwa metode penanganan awal berdasarkan Rencana Teknik Akhir (RTA), yaitu metode stripping, belum sepenuhnya mampu mengatasi karakteristik tanah pada lokasi penelitian. Oleh karena itu, diperlukan evaluasi terhadap alternatif metode perbaikan tanah yang lebih efektif untuk menjamin stabilitas dan kinerja timbunan.
Penelitian ini menggunakan pendekatan kuantitatif melalui analisis numerik berbasis Metode Elemen Hingga dengan bantuan perangkat lunak geoteknik. Data yang digunakan meliputi bore log, Standard Penetration Test (SPT), Cone Penetration Test (CPTu), hasil pengujian laboratorium, data kegempaan, serta data Rencana Teknik Akhir (RTA). Alternatif metode perbaikan tanah yang dianalisis meliputi Soil Substitution 3 m + Preloading, Soil Substitution 3 m + Geofoam 2 m, dan metode Pile Slab. Evaluasi dilakukan berdasarkan parameter penurunan (settlement), faktor keamanan (Safety Factor), serta kapasitas struktur.
Hasil penelitian menunjukkan bahwa desain eksisting menghasilkan penurunan sebesar 7,7 cm dalam 1 tahun maupun 10 tahun sehingga belum memenuhi persyaratan deformasi, meskipun nilai Safety Factor sebesar 1,70 pada kondisi pseudostatik dan 1,53 pada kondisi gempa masih memenuhi batas minimum. Alternatif Soil Substitution 3 m + Preloading memberikan performa paling seimbang dengan penurunan sebesar 2 cm serta nilai Safety Factor sebesar 1,70 pada kondisi pseudostatik dan 1,65 pada kondisi gempa. Alternatif Soil Substitution 3 m + Geofoam 2 m menghasilkan penurunan sebesar 6 cm dengan nilai Safety Factor sebesar 1,90 pada kondisi pseudostatik maupun gempa. Sementara itu, metode Pile Slab memberikan kinerja terbaik dengan momen lentur maksimum sebesar 250 kNm dan 161,1 kNm, masih berada di bawah kapasitas izin 251,3 kNm, serta nilai Safety Factor sebesar 2,00 pada kondisi pseudostatik dan gempa. Berdasarkan hasil tersebut, metode Pile Slab merupakan alternatif paling efektif dalam memenuhi persyaratan stabilitas dan deformasi timbunan pada lokasi penelitian.
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The construction of the Trans-Sumatra Toll Road, Betung (Sp. Sekayu)–Tempino–Jambi Section 4, encountered geotechnical problems marked by embankment failure at STA 156+500–156+575. This condition indicates that the initial treatment proposed in the Final Engineering Design (FED), namely the stripping method, was not fully sufficient to address the soil characteristics at the study location. Therefore, an evaluation of alternative soil improvement methods is required to ensure embankment stability and performance.
This study employed a quantitative approach using Finite Element Method-based numerical analysis through geotechnical software. The analysis utilized bore log data, Standard Penetration Test (SPT), Cone Penetration Test (CPTu), laboratory soil testing results, seismic data, and the Final Engineering Design (FED). The evaluated soil improvement alternatives consisted of 3 m Soil Substitution + Preloading, 3 m Soil Substitution + 2 m Geofoam, and the Pile Slab method. Their performances were assessed based on settlement, safety factor, and structural capacity.
The results indicate that the existing FED design produced a settlement of 7.7 cm after both one and ten years, which did not satisfy the allowable deformation criteria, although the Safety Factor values of 1.70 under pseudostatic conditions and 1.53 under seismic conditions remained above the minimum requirement. The 3 m Soil Substitution + Preloading alternative demonstrated the most balanced performance, producing only 2 cm of settlement with Safety Factor values of 1.70 under pseudostatic conditions and 1.65 under seismic conditions. The 3 m Soil Substitution + 2 m Geofoam alternative resulted in 6 cm of settlement with Safety Factor values of 1.90 under both pseudostatic and seismic conditions. The Pile Slab method provided the best overall performance, with maximum bending moments of 250 kNm and 161.1 kNm, both below the allowable limit of 251.3 kNm, and a Safety Factor of 2.00 under both loading conditions. These findings show that the Pile Slab method is the most effective alternative for satisfying both settlement and embankment stability requirements at the study location.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	metode perbaikan tanah, Metode Elemen Hingga, stabilitas timbunan,settlement, Jalan Tol Trans Sumatera, soil improvement method, Finite Element Method, embankmentstability, settlement, Trans-Sumatra Toll Road.
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:	Dony Afi Hardono
Date Deposited:	15 Jul 2026 08:02
Last Modified:	15 Jul 2026 08:03
URI:	http://repository.its.ac.id/id/eprint/135015

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