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Sefrina, Ani
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Stabilitas Lereng Perkuatan Dinding Penahan Tanah Menggunakan Software GEO5 dan Perhitungan Empiris pada Proyek Jalan Lintas Selatan Lot 1A STA 4+600 Ramadhan, Arya Galih; Sefrina, Ani; Farichah, Himatul
Jurnal Talenta Sipil Vol 8, No 1 (2025): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i1.814

Abstract

Jalan Lintas Selatan LOT 1A is located in Brumbun to Sine Beach, Tulungagung Regency which stretches for 9.560 kilometers. The existing condition of the southern coast of Tulungagung regency is surrounded by steep and steep rocky hills that require excavation and embankment work that will produce a slope. In the construction project of Jalan Lintas Selatan (JLS) LOT 1A STA 4+600 there is a slope located on the shoulder of the road. Slope planning with retaining walls is needed to prevent landslides. Retaining walls are built to maintain slope stability and protect the main road infrastructure. In this study, slope stability calculations with retaining wall reinforcement were carried out using GEO5 software and empirical calculations. In the GEO5 software, the slope is modeled and analyzed according to the existing slope conditions before and after being reinforced with retaining walls. The results obtained were that the slope without reinforcement showed a factor of safety value of 1.45. This value does not meet the minimum standard set in SNI 8460:2017. To improve the stability of the slope, an analysis was carried out by adding retaining wall reinforcement, which resulted in a safety factor value of 2.20, exceeding the minimum standard set, namely SF ≥ 1.5 In addition to the slope stability analysis, an evaluation of the retaining wall was also carried out to ensure its safety against the danger of overturning, sliding, and collapse of the soil bearing capacity. The calculation of the safety factor of the retaining wall was carried out using the empirical method and numerical analysis with Geo5 software. The results of the software analysis showed safety factor values of 6.48 for overturning, 5.43 for sliding, and 3.01 for bearing capacity collapse. Meanwhile, the empirical calculation results showed values of 3.44 for overturning, 5.37 for sliding, and 3.20 for bearing capacity collapse. 
Pengaruh Soil Nailing Terhadap Stabilitas Lereng Menggunakan Software LEM Dan Perhitungan Manual Sefrina, Ani; Solin, Dian Purnawati; Farichah, Himatul
Konstruksia Vol 16 No 2 (2025): Jurnal Konstruksia Vol 16 No. 2 Tahun 2025
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.16.2.97-106

Abstract

Stabilitas lereng merupakan hal yang penting untuk mencegah terjadinya longsor, yang dapat disebabkan oleh berbagai faktor, baik internal (kekuatan tanah) maupun eksternal (aktivitas manusia). Salah satu metode yang sering digunakan untuk memperkuat lereng adalah teknik soil nailing, yang memberikan solusi perkuatan lereng yang efektif dan efisien dari segi biaya dan waktu. Penelitian ini bertujuan untuk menganalisis pengaruh perkuatan soil nailing terhadap stabilitas lereng dengan membandingkan nilai faktor keamanan sebelum dan sesudah perkuatan, menggunakan perhitungan manual (metode Fellenius) serta perangkat lunak LEM. Hasil perhitungan manual menunjukkan bahwa lereng tanpa perkuatan memiliki faktor keamanan sebesar 1,123, sedangkan analisis dengan software LEM menghasilkan nilai 1,352, dimana nilai faktor keamanan dari kedua metode tersebut di bawah batas aman yaitu SF ≥ 1,5, sehingga lereng dinyatakan kritis dan berpotensi longsor. Setelah penerapan soil nailing, faktor keamanan meningkat signifikan: secara manual menjadi 1,792 dan dengan software LEM menjadi 1,858. Analisis lebih lanjut menunjukkan bahwa soil nailing efektif dalam meningkatkan faktor keamanan terhadap keruntuhan global, penggeseran, serta kestabilan internal terhadap kegagalan tarik dan cabut tulangan. Dengan demikian, penerapan soil nailing dapat dianggap sebagai solusi yang aman dan efektif untuk meningkatkan stabilitas lereng sesuai dengan standar yang ditetapkan oleh SNI 8460:2017.
Co-Authors Dian Purnamawati Solin Ramadhan, Arya Galih