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All Journal Paulus Civil Engineering Journal
Andjani, Ni Made Ayu Juli
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Civil Engineering, Building, Construction & Architecture Transportation

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Evaluasi Perilaku Tanah Dasar Embung Rano Tadulako terhadap Pengaruh Gempa Rodiah , Fiisyatin; Sarika , Hardiyanti; Amaliah , Rizki; Warliawati , Sri; Andjani, Ni Made Ayu Juli
Paulus Civil Engineering Journal Vol. 7 No. 4 (2025): Paulus Civil Engineering Journal, Vol.7, No.4
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/zj8j2t19

Abstract

Palu City is an earthquake-prone area, notably marked by the September 28, 2018 earthquake (Mw 7.4) which caused significant damage. Rano Tadulako Reservoir serves as a crucial raw water supply for Tadulako University, necessitating evaluation of its subgrade stability against seismic effects. This study evaluates subgrade stability through dynamic bearing capacity analysis using the pseudostatic method. Primary data includes Cone Penetration Tests at 4 points across 20 cross-sections, while secondary data comprises seismic parameters showing PGA = 0.919 g. Analysis involved calculating horizontal seismic coefficient (kh = 0.46), ultimate bearing capacity using Terzaghi's method, and seismic capacity reduction. Results show 84% of the reservoir (16 of 19 segments) meets safety criteria with SF ≥ 1.5, ranging from 0.150 to 7.402. Critical points were identified at segments 9-10 with SF = 0.150. Overall, the subgrade is relatively safe, though local reinforcement and continuous monitoring are essential for long-term stability.
Co-Authors Amaliah , Rizki Fiisyatin Rodiah Firhansyah Sarika , Hardiyanti Warliawati , Sri