Analisis Stabilitas Dan Efektivitas Alternatif Perbaikan Pada Struktur Bokong Semar (Studi Kasus Jalan Tol Probolinggo Banyuwangi Sta 43+725)

Prayogo, Ardyan Tyo (2026) Analisis Stabilitas Dan Efektivitas Alternatif Perbaikan Pada Struktur Bokong Semar (Studi Kasus Jalan Tol Probolinggo Banyuwangi Sta 43+725). Other thesis, InstitutTeknologi Sepuluh Nopember.

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Abstract

Pembangunan Jalan Tol Probolinggo–Banyuwangi adalah bagian dari pengembangan infrastruktur di Pulau Jawa untuk meningkatkan konektivitas regional. Pada struktur Bokong Semar Jembatan Afvour Safila STA 43+725 ditemukan retakan dan pergeseran yang mengindikasikan ketidakstabilan timbunan. Penelitian ini bertujuan mengevaluasi kondisi timbunan eksisting serta menganalisis efektivitas alternatif perbaikan menggunakan EPS Geofoam dan struktur penahan tanah berupa retaining wall, gabion, dan turap beton pracetak berdasarkan aspek teknis. Analisis dilakukan menggunakan data investigasi tanah, perhitungan geoteknik, serta program bantu GEO5 untuk mengevaluasi stabilitas lereng, guling, geser, daya dukung tanah, dan stabilitas global. Hasil analisis menunjukkan bahwa timbunan eksisting mengalami kegagalan stabilitas internal dengan faktor keamanan 0,58, sedangkan stabilitas eksternal 1,42 masih memenuhi persyaratan. Penggunaan EPS Geofoam tipe EPS15 mampu meningkatkan faktor keamanan menjadi 6,63 sehingga efektif meningkatkan stabilitas timbunan. Seluruh alternatif struktur penahan tanah memenuhi persyaratan teknis sesuai fungsi dan mekanisme kerjanya, sedangkan retaining wall memberikan kinerja paling komprehensif karena memenuhi seluruh persyaratan stabilitas meliputi stabilitas global, guling, geser, dan daya dukung tanah sesuai SNI 8460:2017. Oleh karena itu, retaining wall direkomendasikan sebagai alternatif perbaikan yang paling efektif berdasarkan aspek teknis.
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The Probolinggo–Banyuwangi Toll Road is part of infrastructure development in Java aimed at improving regional connectivity. Cracks and structural displacement were identified at the Bokong Semar embankment of the Afvour Safila Bridge at STA 43+725, indicating embankment instability. This study aims to evaluate the existing embankment condition and assess the effectiveness of improvement alternatives using Expanded Polystyrene (EPS) Geofoam and retaining structures, including retaining walls, gabions, and precast concrete sheet piles, based on technical performance. The analysis was conducted using site investigation data, geotechnical calculations, and the GEO5 software to evaluate slope stability, overturning stability, sliding stability, bearing capacity, and global stability. The results indicate that the existing embankment experienced internal instability with a factor of safety of 0.58, while the external stability factor of safety of 1.42 still satisfied the required criterion. The use of EPS15 Geofoam increased the factor of safety to 6.63, demonstrating its effectiveness in improving embankment stability. All retaining structure alternatives satisfied the technical requirements according to their respective functions and failure mechanisms. Among these alternatives, the gabions exhibited the most comprehensive performance by satisfying all stability requirements, including global stability, overturning, sliding, and bearing capacity, in accordance with SNI 8460:2017. Therefore, the retaining wall is recommended as the most effective technical alternative for improving the Bokong Semar embankment.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	EPS Geofoam, Gabion, Retaining wall, Stabilitas, Turap, Stability, Sheet pile.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction)
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Ardyan Tyo Prayogo
Date Deposited:	28 Jul 2026 01:13
Last Modified:	28 Jul 2026 01:17
URI:	http://repository.its.ac.id/id/eprint/138257

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